/*

  OpenLayers.js -- OpenLayers Map Viewer Library

  Copyright (c) 2006-2012 by OpenLayers Contributors
  Published under the 2-clause BSD license.
  See http://openlayers.org/dev/license.txt for the full text of the license, and http://openlayers.org/dev/authors.txt for full list of contributors.

  Includes compressed code under the following licenses:

  (For uncompressed versions of the code used, please see the
  OpenLayers Github repository: <https://github.com/openlayers/openlayers>)

*/

/**
 * Contains XMLHttpRequest.js <http://code.google.com/p/xmlhttprequest/>
 * Copyright 2007 Sergey Ilinsky (http://www.ilinsky.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 */

/**
 * OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is
 * Copyright (c) 2006, Yahoo! Inc.
 * All rights reserved.
 * 
 * Redistribution and use of this software in source and binary forms, with or
 * without modification, are permitted provided that the following conditions
 * are met:
 * 
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * 
 * * Neither the name of Yahoo! Inc. nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission of Yahoo! Inc.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */
/* ======================================================================
    OpenLayers/SingleFile.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

var OpenLayers = {
    /**
     * Constant: VERSION_NUMBER
     */
    VERSION_NUMBER: "Release 2.12",

    /**
     * Constant: singleFile
     * TODO: remove this in 3.0 when we stop supporting build profiles that
     * include OpenLayers.js
     */
    singleFile: true,

    /**
     * Method: _getScriptLocation
     * Return the path to this script. This is also implemented in
     * OpenLayers.js
     *
     * Returns:
     * {String} Path to this script
     */
    _getScriptLocation: (function() {
        var r = new RegExp("(^|(.*?\\/))(OpenLayers[^\\/]*?\\.js)(\\?|$)"),
            s = document.getElementsByTagName('script'),
            src, m, l = "";
        for(var i=0, len=s.length; i<len; i++) {
            src = s[i].getAttribute('src');
            if(src) {
                m = src.match(r);
                if(m) {
                    l = m[1];
                    break;
                }
            }
        }
        return (function() { return l; });
    })(),
    
    /**
     * Property: ImgPath
     * {String} Set this to the path where control images are stored, a path  
     * given here must end with a slash. If set to '' (which is the default) 
     * OpenLayers will use its script location + "img/".
     * 
     * You will need to set this property when you have a singlefile build of 
     * OpenLayers that either is not named "OpenLayers.js" or if you move
     * the file in a way such that the image directory cannot be derived from 
     * the script location.
     * 
     * If your custom OpenLayers build is named "my-custom-ol.js" and the images
     * of OpenLayers are in a folder "/resources/external/images/ol" a correct
     * way of including OpenLayers in your HTML would be:
     * 
     * (code)
     *   <script src="/path/to/my-custom-ol.js" type="text/javascript"></script>
     *   <script type="text/javascript">
     *      // tell OpenLayers where the control images are
     *      // remember the trailing slash
     *      OpenLayers.ImgPath = "/resources/external/images/ol/";
     *   </script>
     * (end code)
     * 
     * Please remember that when your OpenLayers script is not named 
     * "OpenLayers.js" you will have to make sure that the default theme is 
     * loaded into the page by including an appropriate <link>-tag, 
     * e.g.:
     * 
     * (code)
     *   <link rel="stylesheet" href="/path/to/default/style.css"  type="text/css">
     * (end code)
     */
    ImgPath : ''
};
/* ======================================================================
    OpenLayers/BaseTypes/Class.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/SingleFile.js
 */

/**
 * Constructor: OpenLayers.Class
 * Base class used to construct all other classes. Includes support for 
 *     multiple inheritance. 
 *     
 * This constructor is new in OpenLayers 2.5.  At OpenLayers 3.0, the old 
 *     syntax for creating classes and dealing with inheritance 
 *     will be removed.
 * 
 * To create a new OpenLayers-style class, use the following syntax:
 * (code)
 *     var MyClass = OpenLayers.Class(prototype);
 * (end)
 *
 * To create a new OpenLayers-style class with multiple inheritance, use the
 *     following syntax:
 * (code)
 *     var MyClass = OpenLayers.Class(Class1, Class2, prototype);
 * (end)
 * 
 * Note that instanceof reflection will only reveal Class1 as superclass.
 *
 */
OpenLayers.Class = function() {
    var len = arguments.length;
    var P = arguments[0];
    var F = arguments[len-1];

    var C = typeof F.initialize == "function" ?
        F.initialize :
        function(){ P.prototype.initialize.apply(this, arguments); };

    if (len > 1) {
        var newArgs = [C, P].concat(
                Array.prototype.slice.call(arguments).slice(1, len-1), F);
        OpenLayers.inherit.apply(null, newArgs);
    } else {
        C.prototype = F;
    }
    return C;
};

/**
 * Function: OpenLayers.inherit
 *
 * Parameters:
 * C - {Object} the class that inherits
 * P - {Object} the superclass to inherit from
 *
 * In addition to the mandatory C and P parameters, an arbitrary number of
 * objects can be passed, which will extend C.
 */
OpenLayers.inherit = function(C, P) {
   var F = function() {};
   F.prototype = P.prototype;
   C.prototype = new F;
   var i, l, o;
   for(i=2, l=arguments.length; i<l; i++) {
       o = arguments[i];
       if(typeof o === "function") {
           o = o.prototype;
       }
       OpenLayers.Util.extend(C.prototype, o);
   }
};

/**
 * APIFunction: extend
 * Copy all properties of a source object to a destination object.  Modifies
 *     the passed in destination object.  Any properties on the source object
 *     that are set to undefined will not be (re)set on the destination object.
 *
 * Parameters:
 * destination - {Object} The object that will be modified
 * source - {Object} The object with properties to be set on the destination
 *
 * Returns:
 * {Object} The destination object.
 */
OpenLayers.Util = OpenLayers.Util || {};
OpenLayers.Util.extend = function(destination, source) {
    destination = destination || {};
    if (source) {
        for (var property in source) {
            var value = source[property];
            if (value !== undefined) {
                destination[property] = value;
            }
        }

        /**
         * IE doesn't include the toString property when iterating over an object's
         * properties with the for(property in object) syntax.  Explicitly check if
         * the source has its own toString property.
         */

        /*
         * FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
         * prototype object" when calling hawOwnProperty if the source object
         * is an instance of window.Event.
         */

        var sourceIsEvt = typeof window.Event == "function"
                          && source instanceof window.Event;

        if (!sourceIsEvt
           && source.hasOwnProperty && source.hasOwnProperty("toString")) {
            destination.toString = source.toString;
        }
    }
    return destination;
};
/* ======================================================================
    OpenLayers/BaseTypes.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/SingleFile.js
 */

/** 
 * Header: OpenLayers Base Types
 * OpenLayers custom string, number and function functions are described here.
 */

/**
 * Namespace: OpenLayers.String
 * Contains convenience functions for string manipulation.
 */
OpenLayers.String = {

    /**
     * APIFunction: startsWith
     * Test whether a string starts with another string. 
     * 
     * Parameters:
     * str - {String} The string to test.
     * sub - {String} The substring to look for.
     *  
     * Returns:
     * {Boolean} The first string starts with the second.
     */
    startsWith: function(str, sub) {
        return (str.indexOf(sub) == 0);
    },

    /**
     * APIFunction: contains
     * Test whether a string contains another string.
     * 
     * Parameters:
     * str - {String} The string to test.
     * sub - {String} The substring to look for.
     * 
     * Returns:
     * {Boolean} The first string contains the second.
     */
    contains: function(str, sub) {
        return (str.indexOf(sub) != -1);
    },
    
    /**
     * APIFunction: trim
     * Removes leading and trailing whitespace characters from a string.
     * 
     * Parameters:
     * str - {String} The (potentially) space padded string.  This string is not
     *     modified.
     * 
     * Returns:
     * {String} A trimmed version of the string with all leading and 
     *     trailing spaces removed.
     */
    trim: function(str) {
        return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
    },
    
    /**
     * APIFunction: camelize
     * Camel-case a hyphenated string. 
     *     Ex. "chicken-head" becomes "chickenHead", and
     *     "-chicken-head" becomes "ChickenHead".
     *
     * Parameters:
     * str - {String} The string to be camelized.  The original is not modified.
     * 
     * Returns:
     * {String} The string, camelized
     */
    camelize: function(str) {
        var oStringList = str.split('-');
        var camelizedString = oStringList[0];
        for (var i=1, len=oStringList.length; i<len; i++) {
            var s = oStringList[i];
            camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
        }
        return camelizedString;
    },
    
    /**
     * APIFunction: format
     * Given a string with tokens in the form ${token}, return a string
     *     with tokens replaced with properties from the given context
     *     object.  Represent a literal "${" by doubling it, e.g. "${${".
     *
     * Parameters:
     * template - {String} A string with tokens to be replaced.  A template
     *     has the form "literal ${token}" where the token will be replaced
     *     by the value of context["token"].
     * context - {Object} An optional object with properties corresponding
     *     to the tokens in the format string.  If no context is sent, the
     *     window object will be used.
     * args - {Array} Optional arguments to pass to any functions found in
     *     the context.  If a context property is a function, the token
     *     will be replaced by the return from the function called with
     *     these arguments.
     *
     * Returns:
     * {String} A string with tokens replaced from the context object.
     */
    format: function(template, context, args) {
        if(!context) {
            context = window;
        }

        // Example matching: 
        // str   = ${foo.bar}
        // match = foo.bar
        var replacer = function(str, match) {
            var replacement;

            // Loop through all subs. Example: ${a.b.c}
            // 0 -> replacement = context[a];
            // 1 -> replacement = context[a][b];
            // 2 -> replacement = context[a][b][c];
            var subs = match.split(/\.+/);
            for (var i=0; i< subs.length; i++) {
                if (i == 0) {
                    replacement = context;
                }

                replacement = replacement[subs[i]];
            }

            if(typeof replacement == "function") {
                replacement = args ?
                    replacement.apply(null, args) :
                    replacement();
            }

            // If replacement is undefined, return the string 'undefined'.
            // This is a workaround for a bugs in browsers not properly 
            // dealing with non-participating groups in regular expressions:
            // http://blog.stevenlevithan.com/archives/npcg-javascript
            if (typeof replacement == 'undefined') {
                return 'undefined';
            } else {
                return replacement; 
            }
        };

        return template.replace(OpenLayers.String.tokenRegEx, replacer);
    },

    /**
     * Property: tokenRegEx
     * Used to find tokens in a string.
     * Examples: ${a}, ${a.b.c}, ${a-b}, ${5}
     */
    tokenRegEx:  /\$\{([\w.]+?)\}/g,
    
    /**
     * Property: numberRegEx
     * Used to test strings as numbers.
     */
    numberRegEx: /^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/,
    
    /**
     * APIFunction: isNumeric
     * Determine whether a string contains only a numeric value.
     *
     * Examples:
     * (code)
     * OpenLayers.String.isNumeric("6.02e23") // true
     * OpenLayers.String.isNumeric("12 dozen") // false
     * OpenLayers.String.isNumeric("4") // true
     * OpenLayers.String.isNumeric(" 4 ") // false
     * (end)
     *
     * Returns:
     * {Boolean} String contains only a number.
     */
    isNumeric: function(value) {
        return OpenLayers.String.numberRegEx.test(value);
    },
    
    /**
     * APIFunction: numericIf
     * Converts a string that appears to be a numeric value into a number.
     * 
     * Parameters:
     * value - {String}
     *
     * Returns:
     * {Number|String} a Number if the passed value is a number, a String
     *     otherwise. 
     */
    numericIf: function(value) {
        return OpenLayers.String.isNumeric(value) ? parseFloat(value) : value;
    }

};

/**
 * Namespace: OpenLayers.Number
 * Contains convenience functions for manipulating numbers.
 */
OpenLayers.Number = {

    /**
     * Property: decimalSeparator
     * Decimal separator to use when formatting numbers.
     */
    decimalSeparator: ".",
    
    /**
     * Property: thousandsSeparator
     * Thousands separator to use when formatting numbers.
     */
    thousandsSeparator: ",",
    
    /**
     * APIFunction: limitSigDigs
     * Limit the number of significant digits on a float.
     * 
     * Parameters:
     * num - {Float}
     * sig - {Integer}
     * 
     * Returns:
     * {Float} The number, rounded to the specified number of significant
     *     digits.
     */
    limitSigDigs: function(num, sig) {
        var fig = 0;
        if (sig > 0) {
            fig = parseFloat(num.toPrecision(sig));
        }
        return fig;
    },
    
    /**
     * APIFunction: format
     * Formats a number for output.
     * 
     * Parameters:
     * num  - {Float}
     * dec  - {Integer} Number of decimal places to round to.
     *        Defaults to 0. Set to null to leave decimal places unchanged.
     * tsep - {String} Thousands separator.
     *        Default is ",".
     * dsep - {String} Decimal separator.
     *        Default is ".".
     *
     * Returns:
     * {String} A string representing the formatted number.
     */
    format: function(num, dec, tsep, dsep) {
        dec = (typeof dec != "undefined") ? dec : 0; 
        tsep = (typeof tsep != "undefined") ? tsep :
            OpenLayers.Number.thousandsSeparator; 
        dsep = (typeof dsep != "undefined") ? dsep :
            OpenLayers.Number.decimalSeparator;

        if (dec != null) {
            num = parseFloat(num.toFixed(dec));
        }

        var parts = num.toString().split(".");
        if (parts.length == 1 && dec == null) {
            // integer where we do not want to touch the decimals
            dec = 0;
        }
        
        var integer = parts[0];
        if (tsep) {
            var thousands = /(-?[0-9]+)([0-9]{3})/; 
            while(thousands.test(integer)) { 
                integer = integer.replace(thousands, "$1" + tsep + "$2"); 
            }
        }
        
        var str;
        if (dec == 0) {
            str = integer;
        } else {
            var rem = parts.length > 1 ? parts[1] : "0";
            if (dec != null) {
                rem = rem + new Array(dec - rem.length + 1).join("0");
            }
            str = integer + dsep + rem;
        }
        return str;
    }
};

/**
 * Namespace: OpenLayers.Function
 * Contains convenience functions for function manipulation.
 */
OpenLayers.Function = {
    /**
     * APIFunction: bind
     * Bind a function to an object.  Method to easily create closures with
     *     'this' altered.
     * 
     * Parameters:
     * func - {Function} Input function.
     * object - {Object} The object to bind to the input function (as this).
     * 
     * Returns:
     * {Function} A closure with 'this' set to the passed in object.
     */
    bind: function(func, object) {
        // create a reference to all arguments past the second one
        var args = Array.prototype.slice.apply(arguments, [2]);
        return function() {
            // Push on any additional arguments from the actual function call.
            // These will come after those sent to the bind call.
            var newArgs = args.concat(
                Array.prototype.slice.apply(arguments, [0])
            );
            return func.apply(object, newArgs);
        };
    },
    
    /**
     * APIFunction: bindAsEventListener
     * Bind a function to an object, and configure it to receive the event
     *     object as first parameter when called. 
     * 
     * Parameters:
     * func - {Function} Input function to serve as an event listener.
     * object - {Object} A reference to this.
     * 
     * Returns:
     * {Function}
     */
    bindAsEventListener: function(func, object) {
        return function(event) {
            return func.call(object, event || window.event);
        };
    },
    
    /**
     * APIFunction: False
     * A simple function to that just does "return false". We use this to 
     * avoid attaching anonymous functions to DOM event handlers, which 
     * causes "issues" on IE<8.
     * 
     * Usage:
     * document.onclick = OpenLayers.Function.False;
     * 
     * Returns:
     * {Boolean}
     */
    False : function() {
        return false;
    },

    /**
     * APIFunction: True
     * A simple function to that just does "return true". We use this to 
     * avoid attaching anonymous functions to DOM event handlers, which 
     * causes "issues" on IE<8.
     * 
     * Usage:
     * document.onclick = OpenLayers.Function.True;
     * 
     * Returns:
     * {Boolean}
     */
    True : function() {
        return true;
    },
    
    /**
     * APIFunction: Void
     * A reusable function that returns ``undefined``.
     *
     * Returns:
     * {undefined}
     */
    Void: function() {}

};

/**
 * Namespace: OpenLayers.Array
 * Contains convenience functions for array manipulation.
 */
OpenLayers.Array = {

    /**
     * APIMethod: filter
     * Filter an array.  Provides the functionality of the
     *     Array.prototype.filter extension to the ECMA-262 standard.  Where
     *     available, Array.prototype.filter will be used.
     *
     * Based on well known example from http://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter
     *
     * Parameters:
     * array - {Array} The array to be filtered.  This array is not mutated.
     *     Elements added to this array by the callback will not be visited.
     * callback - {Function} A function that is called for each element in
     *     the array.  If this function returns true, the element will be
     *     included in the return.  The function will be called with three
     *     arguments: the element in the array, the index of that element, and
     *     the array itself.  If the optional caller parameter is specified
     *     the callback will be called with this set to caller.
     * caller - {Object} Optional object to be set as this when the callback
     *     is called.
     *
     * Returns:
     * {Array} An array of elements from the passed in array for which the
     *     callback returns true.
     */
    filter: function(array, callback, caller) {
        var selected = [];
        if (Array.prototype.filter) {
            selected = array.filter(callback, caller);
        } else {
            var len = array.length;
            if (typeof callback != "function") {
                throw new TypeError();
            }
            for(var i=0; i<len; i++) {
                if (i in array) {
                    var val = array[i];
                    if (callback.call(caller, val, i, array)) {
                        selected.push(val);
                    }
                }
            }        
        }
        return selected;
    }
    
};
/* ======================================================================
    OpenLayers/BaseTypes/Bounds.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Bounds
 * Instances of this class represent bounding boxes.  Data stored as left,
 * bottom, right, top floats. All values are initialized to null, however,
 * you should make sure you set them before using the bounds for anything.
 * 
 * Possible use case:
 * (code)
 *     bounds = new OpenLayers.Bounds();
 *     bounds.extend(new OpenLayers.LonLat(4,5));
 *     bounds.extend(new OpenLayers.LonLat(5,6));
 *     bounds.toBBOX(); // returns 4,5,5,6
 * (end)
 */
OpenLayers.Bounds = OpenLayers.Class({

    /**
     * Property: left
     * {Number} Minimum horizontal coordinate.
     */
    left: null,

    /**
     * Property: bottom
     * {Number} Minimum vertical coordinate.
     */
    bottom: null,

    /**
     * Property: right
     * {Number} Maximum horizontal coordinate.
     */
    right: null,

    /**
     * Property: top
     * {Number} Maximum vertical coordinate.
     */
    top: null,
    
    /**
     * Property: centerLonLat
     * {<OpenLayers.LonLat>} A cached center location.  This should not be
     *     accessed directly.  Use <getCenterLonLat> instead.
     */
    centerLonLat: null,

    /**
     * Constructor: OpenLayers.Bounds
     * Construct a new bounds object. Coordinates can either be passed as four
     * arguments, or as a single argument.
     *
     * Parameters (four arguments):
     * left - {Number} The left bounds of the box.  Note that for width
     *        calculations, this is assumed to be less than the right value.
     * bottom - {Number} The bottom bounds of the box.  Note that for height
     *          calculations, this is assumed to be more than the top value.
     * right - {Number} The right bounds.
     * top - {Number} The top bounds.
     *
     * Parameters (single argument):
     * bounds - {Array(Number)} [left, bottom, right, top]
     */
    initialize: function(left, bottom, right, top) {
        if (OpenLayers.Util.isArray(left)) {
            top = left[3];
            right = left[2];
            bottom = left[1];
            left = left[0];
        }
        if (left != null) {
            this.left = OpenLayers.Util.toFloat(left);
        }
        if (bottom != null) {
            this.bottom = OpenLayers.Util.toFloat(bottom);
        }
        if (right != null) {
            this.right = OpenLayers.Util.toFloat(right);
        }
        if (top != null) {
            this.top = OpenLayers.Util.toFloat(top);
        }
    },

    /**
     * Method: clone
     * Create a cloned instance of this bounds.
     *
     * Returns:
     * {<OpenLayers.Bounds>} A fresh copy of the bounds
     */
    clone:function() {
        return new OpenLayers.Bounds(this.left, this.bottom, 
                                     this.right, this.top);
    },

    /**
     * Method: equals
     * Test a two bounds for equivalence.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {Boolean} The passed-in bounds object has the same left,
     *           right, top, bottom components as this.  Note that if bounds 
     *           passed in is null, returns false.
     */
    equals:function(bounds) {
        var equals = false;
        if (bounds != null) {
            equals = ((this.left == bounds.left) && 
                      (this.right == bounds.right) &&
                      (this.top == bounds.top) && 
                      (this.bottom == bounds.bottom));
        }
        return equals;
    },

    /** 
     * APIMethod: toString
     * 
     * Returns:
     * {String} String representation of bounds object. 
     */
    toString:function() {
        return [this.left, this.bottom, this.right, this.top].join(",");
    },

    /**
     * APIMethod: toArray
     *
     * Parameters:
     * reverseAxisOrder - {Boolean} Should we reverse the axis order?
     *
     * Returns:
     * {Array} array of left, bottom, right, top
     */
    toArray: function(reverseAxisOrder) {
        if (reverseAxisOrder === true) {
            return [this.bottom, this.left, this.top, this.right];
        } else {
            return [this.left, this.bottom, this.right, this.top];
        }
    },    

    /** 
     * APIMethod: toBBOX
     * 
     * Parameters:
     * decimal - {Integer} How many significant digits in the bbox coords?
     *                     Default is 6
     * reverseAxisOrder - {Boolean} Should we reverse the axis order?
     * 
     * Returns:
     * {String} Simple String representation of bounds object.
     *          (e.g. <i>"5,42,10,45"</i>)
     */
    toBBOX:function(decimal, reverseAxisOrder) {
        if (decimal== null) {
            decimal = 6; 
        }
        var mult = Math.pow(10, decimal);
        var xmin = Math.round(this.left * mult) / mult;
        var ymin = Math.round(this.bottom * mult) / mult;
        var xmax = Math.round(this.right * mult) / mult;
        var ymax = Math.round(this.top * mult) / mult;
        if (reverseAxisOrder === true) {
            return ymin + "," + xmin + "," + ymax + "," + xmax;
        } else {
            return xmin + "," + ymin + "," + xmax + "," + ymax;
        }
    },
 
    /**
     * APIMethod: toGeometry
     * Create a new polygon geometry based on this bounds.
     *
     * Returns:
     * {<OpenLayers.Geometry.Polygon>} A new polygon with the coordinates
     *     of this bounds.
     */
    toGeometry: function() {
        return new OpenLayers.Geometry.Polygon([
            new OpenLayers.Geometry.LinearRing([
                new OpenLayers.Geometry.Point(this.left, this.bottom),
                new OpenLayers.Geometry.Point(this.right, this.bottom),
                new OpenLayers.Geometry.Point(this.right, this.top),
                new OpenLayers.Geometry.Point(this.left, this.top)
            ])
        ]);
    },
    
    /**
     * APIMethod: getWidth
     * 
     * Returns:
     * {Float} The width of the bounds
     */
    getWidth:function() {
        return (this.right - this.left);
    },

    /**
     * APIMethod: getHeight
     * 
     * Returns:
     * {Float} The height of the bounds (top minus bottom).
     */
    getHeight:function() {
        return (this.top - this.bottom);
    },

    /**
     * APIMethod: getSize
     * 
     * Returns:
     * {<OpenLayers.Size>} The size of the box.
     */
    getSize:function() {
        return new OpenLayers.Size(this.getWidth(), this.getHeight());
    },

    /**
     * APIMethod: getCenterPixel
     * 
     * Returns:
     * {<OpenLayers.Pixel>} The center of the bounds in pixel space.
     */
    getCenterPixel:function() {
        return new OpenLayers.Pixel( (this.left + this.right) / 2,
                                     (this.bottom + this.top) / 2);
    },

    /**
     * APIMethod: getCenterLonLat
     * 
     * Returns:
     * {<OpenLayers.LonLat>} The center of the bounds in map space.
     */
    getCenterLonLat:function() {
        if(!this.centerLonLat) {
            this.centerLonLat = new OpenLayers.LonLat(
                (this.left + this.right) / 2, (this.bottom + this.top) / 2
            );
        }
        return this.centerLonLat;
    },

    /**
     * APIMethod: scale
     * Scales the bounds around a pixel or lonlat. Note that the new 
     *     bounds may return non-integer properties, even if a pixel
     *     is passed. 
     * 
     * Parameters:
     * ratio - {Float} 
     * origin - {<OpenLayers.Pixel> or <OpenLayers.LonLat>}
     *          Default is center.
     *
     * Returns:
     * {<OpenLayers.Bounds>} A new bounds that is scaled by ratio
     *                      from origin.
     */
    scale: function(ratio, origin){
        if(origin == null){
            origin = this.getCenterLonLat();
        }
        
        var origx,origy;

        // get origin coordinates
        if(origin.CLASS_NAME == "OpenLayers.LonLat"){
            origx = origin.lon;
            origy = origin.lat;
        } else {
            origx = origin.x;
            origy = origin.y;
        }

        var left = (this.left - origx) * ratio + origx;
        var bottom = (this.bottom - origy) * ratio + origy;
        var right = (this.right - origx) * ratio + origx;
        var top = (this.top - origy) * ratio + origy;
        
        return new OpenLayers.Bounds(left, bottom, right, top);
    },

    /**
     * APIMethod: add
     * 
     * Parameters:
     * x - {Float}
     * y - {Float}
     * 
     * Returns:
     * {<OpenLayers.Bounds>} A new bounds whose coordinates are the same as
     *     this, but shifted by the passed-in x and y values.
     */
    add:function(x, y) {
        if ( (x == null) || (y == null) ) {
            throw new TypeError('Bounds.add cannot receive null values');
        }
        return new OpenLayers.Bounds(this.left + x, this.bottom + y,
                                     this.right + x, this.top + y);
    },
    
    /**
     * APIMethod: extend
     * Extend the bounds to include the point, lonlat, or bounds specified.
     *     Note, this function assumes that left < right and bottom < top.
     * 
     * Parameters: 
     * object - {Object} Can be LonLat, Point, or Bounds
     */
    extend:function(object) {
        var bounds = null;
        if (object) {
            // clear cached center location
            switch(object.CLASS_NAME) {
                case "OpenLayers.LonLat":    
                    bounds = new OpenLayers.Bounds(object.lon, object.lat,
                                                    object.lon, object.lat);
                    break;
                case "OpenLayers.Geometry.Point":
                    bounds = new OpenLayers.Bounds(object.x, object.y,
                                                    object.x, object.y);
                    break;
                    
                case "OpenLayers.Bounds":    
                    bounds = object;
                    break;
            }
    
            if (bounds) {
                this.centerLonLat = null;
                if ( (this.left == null) || (bounds.left < this.left)) {
                    this.left = bounds.left;
                }
                if ( (this.bottom == null) || (bounds.bottom < this.bottom) ) {
                    this.bottom = bounds.bottom;
                } 
                if ( (this.right == null) || (bounds.right > this.right) ) {
                    this.right = bounds.right;
                }
                if ( (this.top == null) || (bounds.top > this.top) ) { 
                    this.top = bounds.top;
                }
            }
        }
    },

    /**
     * APIMethod: containsLonLat
     * 
     * Parameters:
     * ll - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
     *     object with a 'lon' and 'lat' properties.
     * options - {Object} Optional parameters
     *
     * Acceptable options:
     * inclusive - {Boolean} Whether or not to include the border.
     *     Default is true.
     * worldBounds - {<OpenLayers.Bounds>} If a worldBounds is provided, the
     *     ll will be considered as contained if it exceeds the world bounds,
     *     but can be wrapped around the dateline so it is contained by this
     *     bounds.
     *
     * Returns:
     * {Boolean} The passed-in lonlat is within this bounds.
     */
    containsLonLat: function(ll, options) {
        if (typeof options === "boolean") {
            options =  {inclusive: options};
        }
        options = options || {};
        var contains = this.contains(ll.lon, ll.lat, options.inclusive),
            worldBounds = options.worldBounds;
        if (worldBounds && !contains) {
            var worldWidth = worldBounds.getWidth();
            var worldCenterX = (worldBounds.left + worldBounds.right) / 2;
            var worldsAway = Math.round((ll.lon - worldCenterX) / worldWidth);
            contains = this.containsLonLat({
                lon: ll.lon - worldsAway * worldWidth,
                lat: ll.lat
            }, {inclusive: options.inclusive});
        }
        return contains;
    },

    /**
     * APIMethod: containsPixel
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     * inclusive - {Boolean} Whether or not to include the border. Default is
     *     true.
     *
     * Returns:
     * {Boolean} The passed-in pixel is within this bounds.
     */
    containsPixel:function(px, inclusive) {
        return this.contains(px.x, px.y, inclusive);
    },
    
    /**
     * APIMethod: contains
     * 
     * Parameters:
     * x - {Float}
     * y - {Float}
     * inclusive - {Boolean} Whether or not to include the border. Default is
     *     true.
     *
     * Returns:
     * {Boolean} Whether or not the passed-in coordinates are within this
     *     bounds.
     */
    contains:function(x, y, inclusive) {
        //set default
        if (inclusive == null) {
            inclusive = true;
        }

        if (x == null || y == null) {
            return false;
        }

        x = OpenLayers.Util.toFloat(x);
        y = OpenLayers.Util.toFloat(y);

        var contains = false;
        if (inclusive) {
            contains = ((x >= this.left) && (x <= this.right) && 
                        (y >= this.bottom) && (y <= this.top));
        } else {
            contains = ((x > this.left) && (x < this.right) && 
                        (y > this.bottom) && (y < this.top));
        }              
        return contains;
    },

    /**
     * APIMethod: intersectsBounds
     * Determine whether the target bounds intersects this bounds.  Bounds are
     *     considered intersecting if any of their edges intersect or if one
     *     bounds contains the other.
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} The target bounds.
     * options - {Object} Optional parameters.
     * 
     * Acceptable options:
     * inclusive - {Boolean} Treat coincident borders as intersecting.  Default
     *     is true.  If false, bounds that do not overlap but only touch at the
     *     border will not be considered as intersecting.
     * worldBounds - {<OpenLayers.Bounds>} If a worldBounds is provided, two
     *     bounds will be considered as intersecting if they intersect when 
     *     shifted to within the world bounds.  This applies only to bounds that
     *     cross or are completely outside the world bounds.
     *
     * Returns:
     * {Boolean} The passed-in bounds object intersects this bounds.
     */
    intersectsBounds:function(bounds, options) {
        if (typeof options === "boolean") {
            options =  {inclusive: options};
        }
        options = options || {};
        if (options.worldBounds) {
            var self = this.wrapDateLine(options.worldBounds);
            bounds = bounds.wrapDateLine(options.worldBounds);
        } else {
            self = this;
        }
        if (options.inclusive == null) {
            options.inclusive = true;
        }
        var intersects = false;
        var mightTouch = (
            self.left == bounds.right ||
            self.right == bounds.left ||
            self.top == bounds.bottom ||
            self.bottom == bounds.top
        );
        
        // if the two bounds only touch at an edge, and inclusive is false,
        // then the bounds don't *really* intersect.
        if (options.inclusive || !mightTouch) {
            // otherwise, if one of the boundaries even partially contains another,
            // inclusive of the edges, then they do intersect.
            var inBottom = (
                ((bounds.bottom >= self.bottom) && (bounds.bottom <= self.top)) ||
                ((self.bottom >= bounds.bottom) && (self.bottom <= bounds.top))
            );
            var inTop = (
                ((bounds.top >= self.bottom) && (bounds.top <= self.top)) ||
                ((self.top > bounds.bottom) && (self.top < bounds.top))
            );
            var inLeft = (
                ((bounds.left >= self.left) && (bounds.left <= self.right)) ||
                ((self.left >= bounds.left) && (self.left <= bounds.right))
            );
            var inRight = (
                ((bounds.right >= self.left) && (bounds.right <= self.right)) ||
                ((self.right >= bounds.left) && (self.right <= bounds.right))
            );
            intersects = ((inBottom || inTop) && (inLeft || inRight));
        }
        // document me
        if (options.worldBounds && !intersects) {
            var world = options.worldBounds;
            var width = world.getWidth();
            var selfCrosses = !world.containsBounds(self);
            var boundsCrosses = !world.containsBounds(bounds);
            if (selfCrosses && !boundsCrosses) {
                bounds = bounds.add(-width, 0);
                intersects = self.intersectsBounds(bounds, {inclusive: options.inclusive});
            } else if (boundsCrosses && !selfCrosses) {
                self = self.add(-width, 0);
                intersects = bounds.intersectsBounds(self, {inclusive: options.inclusive});                
            }
        }
        return intersects;
    },
    
    /**
     * APIMethod: containsBounds
     * Determine whether the target bounds is contained within this bounds.
     * 
     * bounds - {<OpenLayers.Bounds>} The target bounds.
     * partial - {Boolean} If any of the target corners is within this bounds
     *     consider the bounds contained.  Default is false.  If false, the
     *     entire target bounds must be contained within this bounds.
     * inclusive - {Boolean} Treat shared edges as contained.  Default is
     *     true.
     *
     * Returns:
     * {Boolean} The passed-in bounds object is contained within this bounds. 
     */
    containsBounds:function(bounds, partial, inclusive) {
        if (partial == null) {
            partial = false;
        }
        if (inclusive == null) {
            inclusive = true;
        }
        var bottomLeft  = this.contains(bounds.left, bounds.bottom, inclusive);
        var bottomRight = this.contains(bounds.right, bounds.bottom, inclusive);
        var topLeft  = this.contains(bounds.left, bounds.top, inclusive);
        var topRight = this.contains(bounds.right, bounds.top, inclusive);
        
        return (partial) ? (bottomLeft || bottomRight || topLeft || topRight)
                         : (bottomLeft && bottomRight && topLeft && topRight);
    },

    /** 
     * APIMethod: determineQuadrant
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     * 
     * Returns:
     * {String} The quadrant ("br" "tr" "tl" "bl") of the bounds in which the
     *     coordinate lies.
     */
    determineQuadrant: function(lonlat) {
    
        var quadrant = "";
        var center = this.getCenterLonLat();
        
        quadrant += (lonlat.lat < center.lat) ? "b" : "t";
        quadrant += (lonlat.lon < center.lon) ? "l" : "r";
    
        return quadrant; 
    },
    
    /**
     * APIMethod: transform
     * Transform the Bounds object from source to dest. 
     *
     * Parameters: 
     * source - {<OpenLayers.Projection>} Source projection. 
     * dest   - {<OpenLayers.Projection>} Destination projection. 
     *
     * Returns:
     * {<OpenLayers.Bounds>} Itself, for use in chaining operations.
     */
    transform: function(source, dest) {
        // clear cached center location
        this.centerLonLat = null;
        var ll = OpenLayers.Projection.transform(
            {'x': this.left, 'y': this.bottom}, source, dest);
        var lr = OpenLayers.Projection.transform(
            {'x': this.right, 'y': this.bottom}, source, dest);
        var ul = OpenLayers.Projection.transform(
            {'x': this.left, 'y': this.top}, source, dest);
        var ur = OpenLayers.Projection.transform(
            {'x': this.right, 'y': this.top}, source, dest);
        this.left   = Math.min(ll.x, ul.x);
        this.bottom = Math.min(ll.y, lr.y);
        this.right  = Math.max(lr.x, ur.x);
        this.top    = Math.max(ul.y, ur.y);
        return this;
    },

    /**
     * APIMethod: wrapDateLine
     *  
     * Parameters:
     * maxExtent - {<OpenLayers.Bounds>}
     * options - {Object} Some possible options are:
     *
     * Allowed Options:
     *                    leftTolerance - {float} Allow for a margin of error 
     *                                            with the 'left' value of this 
     *                                            bound.
     *                                            Default is 0.
     *                    rightTolerance - {float} Allow for a margin of error 
     *                                             with the 'right' value of 
     *                                             this bound.
     *                                             Default is 0.
     * 
     * Returns:
     * {<OpenLayers.Bounds>} A copy of this bounds, but wrapped around the 
     *                       "dateline" (as specified by the borders of 
     *                       maxExtent). Note that this function only returns 
     *                       a different bounds value if this bounds is 
     *                       *entirely* outside of the maxExtent. If this 
     *                       bounds straddles the dateline (is part in/part 
     *                       out of maxExtent), the returned bounds will always 
     *                       cross the left edge of the given maxExtent.
     *.
     */
    wrapDateLine: function(maxExtent, options) {    
        options = options || {};
        
        var leftTolerance = options.leftTolerance || 0;
        var rightTolerance = options.rightTolerance || 0;

        var newBounds = this.clone();
    
        if (maxExtent) {
            var width = maxExtent.getWidth();

            //shift right?
            while (newBounds.left < maxExtent.left && 
                   newBounds.right - rightTolerance <= maxExtent.left ) { 
                newBounds = newBounds.add(width, 0);
            }

            //shift left?
            while (newBounds.left + leftTolerance >= maxExtent.right && 
                   newBounds.right > maxExtent.right ) { 
                newBounds = newBounds.add(-width, 0);
            }
           
            // crosses right only? force left
            var newLeft = newBounds.left + leftTolerance;
            if (newLeft < maxExtent.right && newLeft > maxExtent.left && 
                   newBounds.right - rightTolerance > maxExtent.right) {
                newBounds = newBounds.add(-width, 0);
            }
        }
                
        return newBounds;
    },

    CLASS_NAME: "OpenLayers.Bounds"
});

/** 
 * APIFunction: fromString
 * Alternative constructor that builds a new OpenLayers.Bounds from a 
 *     parameter string
 * 
 * Parameters: 
 * str - {String}Comma-separated bounds string. (e.g. <i>"5,42,10,45"</i>)
 * reverseAxisOrder - {Boolean} Does the string use reverse axis order?
 * 
 * Returns:
 * {<OpenLayers.Bounds>} New bounds object built from the 
 *                       passed-in String.
 */
OpenLayers.Bounds.fromString = function(str, reverseAxisOrder) {
    var bounds = str.split(",");
    return OpenLayers.Bounds.fromArray(bounds, reverseAxisOrder);
};

/** 
 * APIFunction: fromArray
 * Alternative constructor that builds a new OpenLayers.Bounds
 *     from an array
 * 
 * Parameters:
 * bbox - {Array(Float)} Array of bounds values (e.g. <i>[5,42,10,45]</i>)
 * reverseAxisOrder - {Boolean} Does the array use reverse axis order?
 *
 * Returns:
 * {<OpenLayers.Bounds>} New bounds object built from the passed-in Array.
 */
OpenLayers.Bounds.fromArray = function(bbox, reverseAxisOrder) {
    return reverseAxisOrder === true ?
           new OpenLayers.Bounds(bbox[1], bbox[0], bbox[3], bbox[2]) :
           new OpenLayers.Bounds(bbox[0], bbox[1], bbox[2], bbox[3]);
};

/** 
 * APIFunction: fromSize
 * Alternative constructor that builds a new OpenLayers.Bounds
 *     from a size
 * 
 * Parameters:
 * size - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
 *     a 'w' and 'h' properties.
 *
 * Returns:
 * {<OpenLayers.Bounds>} New bounds object built from the passed-in size.
 */
OpenLayers.Bounds.fromSize = function(size) {
    return new OpenLayers.Bounds(0,
                                 size.h,
                                 size.w,
                                 0);
};

/**
 * Function: oppositeQuadrant
 * Get the opposite quadrant for a given quadrant string.
 *
 * Parameters:
 * quadrant - {String} two character quadrant shortstring
 *
 * Returns:
 * {String} The opposing quadrant ("br" "tr" "tl" "bl"). For Example, if 
 *          you pass in "bl" it returns "tr", if you pass in "br" it 
 *          returns "tl", etc.
 */
OpenLayers.Bounds.oppositeQuadrant = function(quadrant) {
    var opp = "";
    
    opp += (quadrant.charAt(0) == 't') ? 'b' : 't';
    opp += (quadrant.charAt(1) == 'l') ? 'r' : 'l';
    
    return opp;
};
/* ======================================================================
    OpenLayers/BaseTypes/Element.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Util.js
 * @requires OpenLayers/BaseTypes.js
 */

/**
 * Namespace: OpenLayers.Element
 */
OpenLayers.Element = {

    /**
     * APIFunction: visible
     * 
     * Parameters: 
     * element - {DOMElement}
     * 
     * Returns:
     * {Boolean} Is the element visible?
     */
    visible: function(element) {
        return OpenLayers.Util.getElement(element).style.display != 'none';
    },

    /**
     * APIFunction: toggle
     * Toggle the visibility of element(s) passed in
     * 
     * Parameters:
     * element - {DOMElement} Actually user can pass any number of elements
     */
    toggle: function() {
        for (var i=0, len=arguments.length; i<len; i++) {
            var element = OpenLayers.Util.getElement(arguments[i]);
            var display = OpenLayers.Element.visible(element) ? 'none' 
                                                              : '';
            element.style.display = display;
        }
    },

    /**
     * APIFunction: remove
     * Remove the specified element from the DOM.
     * 
     * Parameters:
     * element - {DOMElement}
     */
    remove: function(element) {
        element = OpenLayers.Util.getElement(element);
        element.parentNode.removeChild(element);
    },

    /**
     * APIFunction: getHeight
     *  
     * Parameters:
     * element - {DOMElement}
     * 
     * Returns:
     * {Integer} The offset height of the element passed in
     */
    getHeight: function(element) {
        element = OpenLayers.Util.getElement(element);
        return element.offsetHeight;
    },

    /**
     * Function: hasClass
     * Tests if an element has the given CSS class name.
     *
     * Parameters:
     * element - {DOMElement} A DOM element node.
     * name - {String} The CSS class name to search for.
     *
     * Returns:
     * {Boolean} The element has the given class name.
     */
    hasClass: function(element, name) {
        var names = element.className;
        return (!!names && new RegExp("(^|\\s)" + name + "(\\s|$)").test(names));
    },
    
    /**
     * Function: addClass
     * Add a CSS class name to an element.  Safe where element already has
     *     the class name.
     *
     * Parameters:
     * element - {DOMElement} A DOM element node.
     * name - {String} The CSS class name to add.
     *
     * Returns:
     * {DOMElement} The element.
     */
    addClass: function(element, name) {
        if(!OpenLayers.Element.hasClass(element, name)) {
            element.className += (element.className ? " " : "") + name;
        }
        return element;
    },

    /**
     * Function: removeClass
     * Remove a CSS class name from an element.  Safe where element does not
     *     have the class name.
     *
     * Parameters:
     * element - {DOMElement} A DOM element node.
     * name - {String} The CSS class name to remove.
     *
     * Returns:
     * {DOMElement} The element.
     */
    removeClass: function(element, name) {
        var names = element.className;
        if(names) {
            element.className = OpenLayers.String.trim(
                names.replace(
                    new RegExp("(^|\\s+)" + name + "(\\s+|$)"), " "
                )
            );
        }
        return element;
    },

    /**
     * Function: toggleClass
     * Remove a CSS class name from an element if it exists.  Add the class name
     *     if it doesn't exist.
     *
     * Parameters:
     * element - {DOMElement} A DOM element node.
     * name - {String} The CSS class name to toggle.
     *
     * Returns:
     * {DOMElement} The element.
     */
    toggleClass: function(element, name) {
        if(OpenLayers.Element.hasClass(element, name)) {
            OpenLayers.Element.removeClass(element, name);
        } else {
            OpenLayers.Element.addClass(element, name);
        }
        return element;
    },

    /**
     * APIFunction: getStyle
     * 
     * Parameters:
     * element - {DOMElement}
     * style - {?}
     * 
     * Returns:
     * {?}
     */
    getStyle: function(element, style) {
        element = OpenLayers.Util.getElement(element);

        var value = null;
        if (element && element.style) {
            value = element.style[OpenLayers.String.camelize(style)];
            if (!value) {
                if (document.defaultView && 
                    document.defaultView.getComputedStyle) {
                    
                    var css = document.defaultView.getComputedStyle(element, null);
                    value = css ? css.getPropertyValue(style) : null;
                } else if (element.currentStyle) {
                    value = element.currentStyle[OpenLayers.String.camelize(style)];
                }
            }
        
            var positions = ['left', 'top', 'right', 'bottom'];
            if (window.opera &&
                (OpenLayers.Util.indexOf(positions,style) != -1) &&
                (OpenLayers.Element.getStyle(element, 'position') == 'static')) { 
                value = 'auto';
            }
        }
    
        return value == 'auto' ? null : value;
    }

};
/* ======================================================================
    OpenLayers/BaseTypes/LonLat.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.LonLat
 * This class represents a longitude and latitude pair
 */
OpenLayers.LonLat = OpenLayers.Class({

    /** 
     * APIProperty: lon
     * {Float} The x-axis coodinate in map units
     */
    lon: 0.0,
    
    /** 
     * APIProperty: lat
     * {Float} The y-axis coordinate in map units
     */
    lat: 0.0,

    /**
     * Constructor: OpenLayers.LonLat
     * Create a new map location. Coordinates can be passed either as two
     * arguments, or as a single argument.
     *
     * Parameters (two arguments):
     * lon - {Number} The x-axis coordinate in map units.  If your map is in
     *     a geographic projection, this will be the Longitude.  Otherwise,
     *     it will be the x coordinate of the map location in your map units.
     * lat - {Number} The y-axis coordinate in map units.  If your map is in
     *     a geographic projection, this will be the Latitude.  Otherwise,
     *     it will be the y coordinate of the map location in your map units.
     *
     * Parameters (single argument):
     * location - {Array(Float)} [lon, lat]
     */
    initialize: function(lon, lat) {
        if (OpenLayers.Util.isArray(lon)) {
            lat = lon[1];
            lon = lon[0];
        }
        this.lon = OpenLayers.Util.toFloat(lon);
        this.lat = OpenLayers.Util.toFloat(lat);
    },
    
    /**
     * Method: toString
     * Return a readable string version of the lonlat
     *
     * Returns:
     * {String} String representation of OpenLayers.LonLat object. 
     *           (e.g. <i>"lon=5,lat=42"</i>)
     */
    toString:function() {
        return ("lon=" + this.lon + ",lat=" + this.lat);
    },

    /** 
     * APIMethod: toShortString
     * 
     * Returns:
     * {String} Shortened String representation of OpenLayers.LonLat object. 
     *         (e.g. <i>"5, 42"</i>)
     */
    toShortString:function() {
        return (this.lon + ", " + this.lat);
    },

    /** 
     * APIMethod: clone
     * 
     * Returns:
     * {<OpenLayers.LonLat>} New OpenLayers.LonLat object with the same lon 
     *                       and lat values
     */
    clone:function() {
        return new OpenLayers.LonLat(this.lon, this.lat);
    },

    /** 
     * APIMethod: add
     * 
     * Parameters:
     * lon - {Float}
     * lat - {Float}
     * 
     * Returns:
     * {<OpenLayers.LonLat>} A new OpenLayers.LonLat object with the lon and 
     *                       lat passed-in added to this's. 
     */
    add:function(lon, lat) {
        if ( (lon == null) || (lat == null) ) {
            throw new TypeError('LonLat.add cannot receive null values');
        }
        return new OpenLayers.LonLat(this.lon + OpenLayers.Util.toFloat(lon), 
                                     this.lat + OpenLayers.Util.toFloat(lat));
    },

    /** 
     * APIMethod: equals
     * 
     * Parameters:
     * ll - {<OpenLayers.LonLat>}
     * 
     * Returns:
     * {Boolean} Boolean value indicating whether the passed-in 
     *           <OpenLayers.LonLat> object has the same lon and lat 
     *           components as this.
     *           Note: if ll passed in is null, returns false
     */
    equals:function(ll) {
        var equals = false;
        if (ll != null) {
            equals = ((this.lon == ll.lon && this.lat == ll.lat) ||
                      (isNaN(this.lon) && isNaN(this.lat) && isNaN(ll.lon) && isNaN(ll.lat)));
        }
        return equals;
    },

    /**
     * APIMethod: transform
     * Transform the LonLat object from source to dest. This transformation is
     *    *in place*: if you want a *new* lonlat, use .clone() first.
     *
     * Parameters: 
     * source - {<OpenLayers.Projection>} Source projection. 
     * dest   - {<OpenLayers.Projection>} Destination projection. 
     *
     * Returns:
     * {<OpenLayers.LonLat>} Itself, for use in chaining operations.
     */
    transform: function(source, dest) {
        var point = OpenLayers.Projection.transform(
            {'x': this.lon, 'y': this.lat}, source, dest);
        this.lon = point.x;
        this.lat = point.y;
        return this;
    },
    
    /**
     * APIMethod: wrapDateLine
     * 
     * Parameters:
     * maxExtent - {<OpenLayers.Bounds>}
     * 
     * Returns:
     * {<OpenLayers.LonLat>} A copy of this lonlat, but wrapped around the 
     *                       "dateline" (as specified by the borders of 
     *                       maxExtent)
     */
    wrapDateLine: function(maxExtent) {    

        var newLonLat = this.clone();
    
        if (maxExtent) {
            //shift right?
            while (newLonLat.lon < maxExtent.left) {
                newLonLat.lon +=  maxExtent.getWidth();
            }    
           
            //shift left?
            while (newLonLat.lon > maxExtent.right) {
                newLonLat.lon -= maxExtent.getWidth();
            }    
        }
                
        return newLonLat;
    },

    CLASS_NAME: "OpenLayers.LonLat"
});

/** 
 * Function: fromString
 * Alternative constructor that builds a new <OpenLayers.LonLat> from a 
 *     parameter string
 * 
 * Parameters:
 * str - {String} Comma-separated Lon,Lat coordinate string. 
 *                 (e.g. <i>"5,40"</i>)
 * 
 * Returns:
 * {<OpenLayers.LonLat>} New <OpenLayers.LonLat> object built from the 
 *                       passed-in String.
 */
OpenLayers.LonLat.fromString = function(str) {
    var pair = str.split(",");
    return new OpenLayers.LonLat(pair[0], pair[1]);
};

/** 
 * Function: fromArray
 * Alternative constructor that builds a new <OpenLayers.LonLat> from an 
 *     array of two numbers that represent lon- and lat-values.
 * 
 * Parameters:
 * arr - {Array(Float)} Array of lon/lat values (e.g. [5,-42])
 * 
 * Returns:
 * {<OpenLayers.LonLat>} New <OpenLayers.LonLat> object built from the 
 *                       passed-in array.
 */
OpenLayers.LonLat.fromArray = function(arr) {
    var gotArr = OpenLayers.Util.isArray(arr),
        lon = gotArr && arr[0],
        lat = gotArr && arr[1];
    return new OpenLayers.LonLat(lon, lat);
};
/* ======================================================================
    OpenLayers/BaseTypes/Pixel.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Pixel
 * This class represents a screen coordinate, in x and y coordinates
 */
OpenLayers.Pixel = OpenLayers.Class({
    
    /**
     * APIProperty: x
     * {Number} The x coordinate
     */
    x: 0.0,

    /**
     * APIProperty: y
     * {Number} The y coordinate
     */
    y: 0.0,
    
    /**
     * Constructor: OpenLayers.Pixel
     * Create a new OpenLayers.Pixel instance
     *
     * Parameters:
     * x - {Number} The x coordinate
     * y - {Number} The y coordinate
     *
     * Returns:
     * An instance of OpenLayers.Pixel
     */
    initialize: function(x, y) {
        this.x = parseFloat(x);
        this.y = parseFloat(y);
    },
    
    /**
     * Method: toString
     * Cast this object into a string
     *
     * Returns:
     * {String} The string representation of Pixel. ex: "x=200.4,y=242.2"
     */
    toString:function() {
        return ("x=" + this.x + ",y=" + this.y);
    },

    /**
     * APIMethod: clone
     * Return a clone of this pixel object
     *
     * Returns:
     * {<OpenLayers.Pixel>} A clone pixel
     */
    clone:function() {
        return new OpenLayers.Pixel(this.x, this.y); 
    },
    
    /**
     * APIMethod: equals
     * Determine whether one pixel is equivalent to another
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
     *                                  a 'x' and 'y' properties.
     *
     * Returns:
     * {Boolean} The point passed in as parameter is equal to this. Note that
     * if px passed in is null, returns false.
     */
    equals:function(px) {
        var equals = false;
        if (px != null) {
            equals = ((this.x == px.x && this.y == px.y) ||
                      (isNaN(this.x) && isNaN(this.y) && isNaN(px.x) && isNaN(px.y)));
        }
        return equals;
    },

    /**
     * APIMethod: distanceTo
     * Returns the distance to the pixel point passed in as a parameter.
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     *
     * Returns:
     * {Float} The pixel point passed in as parameter to calculate the
     *     distance to.
     */
    distanceTo:function(px) {
        return Math.sqrt(
            Math.pow(this.x - px.x, 2) +
            Math.pow(this.y - px.y, 2)
        );
    },

    /**
     * APIMethod: add
     *
     * Parameters:
     * x - {Integer}
     * y - {Integer}
     *
     * Returns:
     * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the 
     * values passed in.
     */
    add:function(x, y) {
        if ( (x == null) || (y == null) ) {
            throw new TypeError('Pixel.add cannot receive null values');
        }
        return new OpenLayers.Pixel(this.x + x, this.y + y);
    },

    /**
    * APIMethod: offset
    * 
    * Parameters
    * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
    *                                  a 'x' and 'y' properties.
    * 
    * Returns:
    * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the 
    *                      x&y values of the pixel passed in.
    */
    offset:function(px) {
        var newPx = this.clone();
        if (px) {
            newPx = this.add(px.x, px.y);
        }
        return newPx;
    },

    CLASS_NAME: "OpenLayers.Pixel"
});
/* ======================================================================
    OpenLayers/BaseTypes/Size.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Size
 * Instances of this class represent a width/height pair
 */
OpenLayers.Size = OpenLayers.Class({

    /**
     * APIProperty: w
     * {Number} width
     */
    w: 0.0,
    
    /**
     * APIProperty: h
     * {Number} height
     */
    h: 0.0,


    /**
     * Constructor: OpenLayers.Size
     * Create an instance of OpenLayers.Size
     *
     * Parameters:
     * w - {Number} width
     * h - {Number} height
     */
    initialize: function(w, h) {
        this.w = parseFloat(w);
        this.h = parseFloat(h);
    },

    /**
     * Method: toString
     * Return the string representation of a size object
     *
     * Returns:
     * {String} The string representation of OpenLayers.Size object. 
     * (e.g. <i>"w=55,h=66"</i>)
     */
    toString:function() {
        return ("w=" + this.w + ",h=" + this.h);
    },

    /**
     * APIMethod: clone
     * Create a clone of this size object
     *
     * Returns:
     * {<OpenLayers.Size>} A new OpenLayers.Size object with the same w and h
     * values
     */
    clone:function() {
        return new OpenLayers.Size(this.w, this.h);
    },

    /**
     *
     * APIMethod: equals
     * Determine where this size is equal to another
     *
     * Parameters:
     * sz - {<OpenLayers.Size>|Object} An OpenLayers.Size or an object with
     *                                  a 'w' and 'h' properties.
     *
     * Returns: 
     * {Boolean} The passed in size has the same h and w properties as this one.
     * Note that if sz passed in is null, returns false.
     */
    equals:function(sz) {
        var equals = false;
        if (sz != null) {
            equals = ((this.w == sz.w && this.h == sz.h) ||
                      (isNaN(this.w) && isNaN(this.h) && isNaN(sz.w) && isNaN(sz.h)));
        }
        return equals;
    },

    CLASS_NAME: "OpenLayers.Size"
});
/* ======================================================================
    OpenLayers/Console.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Namespace: OpenLayers.Console
 * The OpenLayers.Console namespace is used for debugging and error logging.
 * If the Firebug Lite (../Firebug/firebug.js) is included before this script,
 * calls to OpenLayers.Console methods will get redirected to window.console.
 * This makes use of the Firebug extension where available and allows for
 * cross-browser debugging Firebug style.
 *
 * Note:
 * Note that behavior will differ with the Firebug extention and Firebug Lite.
 * Most notably, the Firebug Lite console does not currently allow for
 * hyperlinks to code or for clicking on object to explore their properties.
 * 
 */
OpenLayers.Console = {
    /**
     * Create empty functions for all console methods.  The real value of these
     * properties will be set if Firebug Lite (../Firebug/firebug.js script) is
     * included.  We explicitly require the Firebug Lite script to trigger
     * functionality of the OpenLayers.Console methods.
     */
    
    /**
     * APIFunction: log
     * Log an object in the console.  The Firebug Lite console logs string
     * representation of objects.  Given multiple arguments, they will
     * be cast to strings and logged with a space delimiter.  If the first
     * argument is a string with printf-like formatting, subsequent arguments
     * will be used in string substitution.  Any additional arguments (beyond
     * the number substituted in a format string) will be appended in a space-
     * delimited line.
     * 
     * Parameters:
     * object - {Object}
     */
    log: function() {},

    /**
     * APIFunction: debug
     * Writes a message to the console, including a hyperlink to the line
     * where it was called.
     *
     * May be called with multiple arguments as with OpenLayers.Console.log().
     * 
     * Parameters:
     * object - {Object}
     */
    debug: function() {},

    /**
     * APIFunction: info
     * Writes a message to the console with the visual "info" icon and color
     * coding and a hyperlink to the line where it was called.
     *
     * May be called with multiple arguments as with OpenLayers.Console.log().
     * 
     * Parameters:
     * object - {Object}
     */
    info: function() {},

    /**
     * APIFunction: warn
     * Writes a message to the console with the visual "warning" icon and
     * color coding and a hyperlink to the line where it was called.
     *
     * May be called with multiple arguments as with OpenLayers.Console.log().
     * 
     * Parameters:
     * object - {Object}
     */
    warn: function() {},

    /**
     * APIFunction: error
     * Writes a message to the console with the visual "error" icon and color
     * coding and a hyperlink to the line where it was called.
     *
     * May be called with multiple arguments as with OpenLayers.Console.log().
     * 
     * Parameters:
     * object - {Object}
     */
    error: function() {},
    
    /**
     * APIFunction: userError
     * A single interface for showing error messages to the user. The default
     * behavior is a Javascript alert, though this can be overridden by
     * reassigning OpenLayers.Console.userError to a different function.
     *
     * Expects a single error message
     * 
     * Parameters:
     * error - {Object}
     */
    userError: function(error) {
        alert(error);
    },

    /**
     * APIFunction: assert
     * Tests that an expression is true. If not, it will write a message to
     * the console and throw an exception.
     *
     * May be called with multiple arguments as with OpenLayers.Console.log().
     * 
     * Parameters:
     * object - {Object}
     */
    assert: function() {},

    /**
     * APIFunction: dir
     * Prints an interactive listing of all properties of the object. This
     * looks identical to the view that you would see in the DOM tab.
     * 
     * Parameters:
     * object - {Object}
     */
    dir: function() {},

    /**
     * APIFunction: dirxml
     * Prints the XML source tree of an HTML or XML element. This looks
     * identical to the view that you would see in the HTML tab. You can click
     * on any node to inspect it in the HTML tab.
     * 
     * Parameters:
     * object - {Object}
     */
    dirxml: function() {},

    /**
     * APIFunction: trace
     * Prints an interactive stack trace of JavaScript execution at the point
     * where it is called.  The stack trace details the functions on the stack,
     * as well as the values that were passed as arguments to each function.
     * You can click each function to take you to its source in the Script tab,
     * and click each argument value to inspect it in the DOM or HTML tabs.
     * 
     */
    trace: function() {},

    /**
     * APIFunction: group
     * Writes a message to the console and opens a nested block to indent all
     * future messages sent to the console. Call OpenLayers.Console.groupEnd()
     * to close the block.
     *
     * May be called with multiple arguments as with OpenLayers.Console.log().
     * 
     * Parameters:
     * object - {Object}
     */
    group: function() {},

    /**
     * APIFunction: groupEnd
     * Closes the most recently opened block created by a call to
     * OpenLayers.Console.group
     */
    groupEnd: function() {},
    
    /**
     * APIFunction: time
     * Creates a new timer under the given name. Call
     * OpenLayers.Console.timeEnd(name)
     * with the same name to stop the timer and print the time elapsed.
     *
     * Parameters:
     * name - {String}
     */
    time: function() {},

    /**
     * APIFunction: timeEnd
     * Stops a timer created by a call to OpenLayers.Console.time(name) and
     * writes the time elapsed.
     *
     * Parameters:
     * name - {String}
     */
    timeEnd: function() {},

    /**
     * APIFunction: profile
     * Turns on the JavaScript profiler. The optional argument title would
     * contain the text to be printed in the header of the profile report.
     *
     * This function is not currently implemented in Firebug Lite.
     * 
     * Parameters:
     * title - {String} Optional title for the profiler
     */
    profile: function() {},

    /**
     * APIFunction: profileEnd
     * Turns off the JavaScript profiler and prints its report.
     * 
     * This function is not currently implemented in Firebug Lite.
     */
    profileEnd: function() {},

    /**
     * APIFunction: count
     * Writes the number of times that the line of code where count was called
     * was executed. The optional argument title will print a message in
     * addition to the number of the count.
     *
     * This function is not currently implemented in Firebug Lite.
     *
     * Parameters:
     * title - {String} Optional title to be printed with count
     */
    count: function() {},

    CLASS_NAME: "OpenLayers.Console"
};

/**
 * Execute an anonymous function to extend the OpenLayers.Console namespace
 * if the firebug.js script is included.  This closure is used so that the
 * "scripts" and "i" variables don't pollute the global namespace.
 */
(function() {
    /**
     * If Firebug Lite is included (before this script), re-route all
     * OpenLayers.Console calls to the console object.
     */
    var scripts = document.getElementsByTagName("script");
    for(var i=0, len=scripts.length; i<len; ++i) {
        if(scripts[i].src.indexOf("firebug.js") != -1) {
            if(console) {
                OpenLayers.Util.extend(OpenLayers.Console, console);
                break;
            }
        }
    }
})();
/* ======================================================================
    OpenLayers/Lang.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes.js
 * @requires OpenLayers/Console.js
 */

/**
 * Namespace: OpenLayers.Lang
 * Internationalization namespace.  Contains dictionaries in various languages
 *     and methods to set and get the current language.
 */
OpenLayers.Lang = {
    
    /** 
     * Property: code
     * {String}  Current language code to use in OpenLayers.  Use the
     *     <setCode> method to set this value and the <getCode> method to
     *     retrieve it.
     */
    code: null,

    /** 
     * APIProperty: defaultCode
     * {String} Default language to use when a specific language can't be
     *     found.  Default is "en".
     */
    defaultCode: "en",
        
    /**
     * APIFunction: getCode
     * Get the current language code.
     *
     * Returns:
     * {String} The current language code.
     */
    getCode: function() {
        if(!OpenLayers.Lang.code) {
            OpenLayers.Lang.setCode();
        }
        return OpenLayers.Lang.code;
    },
    
    /**
     * APIFunction: setCode
     * Set the language code for string translation.  This code is used by
     *     the <OpenLayers.Lang.translate> method.
     *
     * Parameters:
     * code - {String} These codes follow the IETF recommendations at
     *     http://www.ietf.org/rfc/rfc3066.txt.  If no value is set, the
     *     browser's language setting will be tested.  If no <OpenLayers.Lang>
     *     dictionary exists for the code, the <OpenLayers.String.defaultLang>
     *     will be used.
     */
    setCode: function(code) {
        var lang;
        if(!code) {
            code = (OpenLayers.BROWSER_NAME == "msie") ?
                navigator.userLanguage : navigator.language;
        }
        var parts = code.split('-');
        parts[0] = parts[0].toLowerCase();
        if(typeof OpenLayers.Lang[parts[0]] == "object") {
            lang = parts[0];
        }

        // check for regional extensions
        if(parts[1]) {
            var testLang = parts[0] + '-' + parts[1].toUpperCase();
            if(typeof OpenLayers.Lang[testLang] == "object") {
                lang = testLang;
            }
        }
        if(!lang) {
            OpenLayers.Console.warn(
                'Failed to find OpenLayers.Lang.' + parts.join("-") +
                ' dictionary, falling back to default language'
            );
            lang = OpenLayers.Lang.defaultCode;
        }
        
        OpenLayers.Lang.code = lang;
    },

    /**
     * APIMethod: translate
     * Looks up a key from a dictionary based on the current language string.
     *     The value of <getCode> will be used to determine the appropriate
     *     dictionary.  Dictionaries are stored in <OpenLayers.Lang>.
     *
     * Parameters:
     * key - {String} The key for an i18n string value in the dictionary.
     * context - {Object} Optional context to be used with
     *     <OpenLayers.String.format>.
     * 
     * Returns:
     * {String} A internationalized string.
     */
    translate: function(key, context) {
        var dictionary = OpenLayers.Lang[OpenLayers.Lang.getCode()];
        var message = dictionary && dictionary[key];
        if(!message) {
            // Message not found, fall back to message key
            message = key;
        }
        if(context) {
            message = OpenLayers.String.format(message, context);
        }
        return message;
    }
    
};


/**
 * APIMethod: OpenLayers.i18n
 * Alias for <OpenLayers.Lang.translate>.  Looks up a key from a dictionary
 *     based on the current language string. The value of
 *     <OpenLayers.Lang.getCode> will be used to determine the appropriate
 *     dictionary.  Dictionaries are stored in <OpenLayers.Lang>.
 *
 * Parameters:
 * key - {String} The key for an i18n string value in the dictionary.
 * context - {Object} Optional context to be used with
 *     <OpenLayers.String.format>.
 * 
 * Returns:
 * {String} A internationalized string.
 */
OpenLayers.i18n = OpenLayers.Lang.translate;
/* ======================================================================
    OpenLayers/Util.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes.js
 * @requires OpenLayers/BaseTypes/Bounds.js
 * @requires OpenLayers/BaseTypes/Element.js
 * @requires OpenLayers/BaseTypes/LonLat.js
 * @requires OpenLayers/BaseTypes/Pixel.js
 * @requires OpenLayers/BaseTypes/Size.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Namespace: Util
 */
OpenLayers.Util = OpenLayers.Util || {};

/** 
 * Function: getElement
 * This is the old $() from prototype
 *
 * Parameters:
 * e - {String or DOMElement or Window}
 *
 * Returns:
 * {Array(DOMElement) or DOMElement}
 */
OpenLayers.Util.getElement = function() {
    var elements = [];

    for (var i=0, len=arguments.length; i<len; i++) {
        var element = arguments[i];
        if (typeof element == 'string') {
            element = document.getElementById(element);
        }
        if (arguments.length == 1) {
            return element;
        }
        elements.push(element);
    }
    return elements;
};

/**
 * Function: isElement
 * A cross-browser implementation of "e instanceof Element".
 *
 * Parameters:
 * o - {Object} The object to test.
 *
 * Returns:
 * {Boolean}
 */
OpenLayers.Util.isElement = function(o) {
    return !!(o && o.nodeType === 1);
};

/**
 * Function: isArray
 * Tests that the provided object is an array.
 * This test handles the cross-IFRAME case not caught
 * by "a instanceof Array" and should be used instead.
 * 
 * Parameters:
 * a - {Object} the object test.
 * 
 * Returns:
 * {Boolean} true if the object is an array.
 */
OpenLayers.Util.isArray = function(a) {
	return (Object.prototype.toString.call(a) === '[object Array]');
};

/** 
 * Maintain existing definition of $.
 */
if(typeof window.$  === "undefined") {
    window.$ = OpenLayers.Util.getElement;
}

/** 
 * Function: removeItem
 * Remove an object from an array. Iterates through the array
 *     to find the item, then removes it.
 *
 * Parameters:
 * array - {Array}
 * item - {Object}
 * 
 * Returns:
 * {Array} A reference to the array
 */
OpenLayers.Util.removeItem = function(array, item) {
    for(var i = array.length - 1; i >= 0; i--) {
        if(array[i] == item) {
            array.splice(i,1);
            //break;more than once??
        }
    }
    return array;
};

/** 
 * Function: indexOf
 * Seems to exist already in FF, but not in MOZ.
 * 
 * Parameters:
 * array - {Array}
 * obj - {*}
 * 
 * Returns:
 * {Integer} The index at, which the first object was found in the array.
 *           If not found, returns -1.
 */
OpenLayers.Util.indexOf = function(array, obj) {
    // use the build-in function if available.
    if (typeof array.indexOf == "function") {
        return array.indexOf(obj);
    } else {
        for (var i = 0, len = array.length; i < len; i++) {
            if (array[i] == obj) {
                return i;
            }
        }
        return -1;   
    }
};



/**
 * Function: modifyDOMElement
 * 
 * Modifies many properties of a DOM element all at once.  Passing in 
 * null to an individual parameter will avoid setting the attribute.
 *
 * Parameters:
 * element - {DOMElement} DOM element to modify.
 * id - {String} The element id attribute to set.
 * px - {<OpenLayers.Pixel>|Object} The element left and top position,
 *                                  OpenLayers.Pixel or an object with
 *                                  a 'x' and 'y' properties.
 * sz - {<OpenLayers.Size>|Object} The element width and height,
 *                                 OpenLayers.Size or an object with a
 *                                 'w' and 'h' properties.
 * position - {String}       The position attribute.  eg: absolute, 
 *                           relative, etc.
 * border - {String}         The style.border attribute.  eg:
 *                           solid black 2px
 * overflow - {String}       The style.overview attribute.  
 * opacity - {Float}         Fractional value (0.0 - 1.0)
 */
OpenLayers.Util.modifyDOMElement = function(element, id, px, sz, position, 
                                            border, overflow, opacity) {

    if (id) {
        element.id = id;
    }
    if (px) {
        element.style.left = px.x + "px";
        element.style.top = px.y + "px";
    }
    if (sz) {
        element.style.width = sz.w + "px";
        element.style.height = sz.h + "px";
    }
    if (position) {
        element.style.position = position;
    }
    if (border) {
        element.style.border = border;
    }
    if (overflow) {
        element.style.overflow = overflow;
    }
    if (parseFloat(opacity) >= 0.0 && parseFloat(opacity) < 1.0) {
        element.style.filter = 'alpha(opacity=' + (opacity * 100) + ')';
        element.style.opacity = opacity;
    } else if (parseFloat(opacity) == 1.0) {
        element.style.filter = '';
        element.style.opacity = '';
    }
};

/** 
 * Function: createDiv
 * Creates a new div and optionally set some standard attributes.
 * Null may be passed to each parameter if you do not wish to
 * set a particular attribute.
 * Note - zIndex is NOT set on the resulting div.
 * 
 * Parameters:
 * id - {String} An identifier for this element.  If no id is
 *               passed an identifier will be created 
 *               automatically.
 * px - {<OpenLayers.Pixel>|Object} The element left and top position,
 *                                  OpenLayers.Pixel or an object with
 *                                  a 'x' and 'y' properties.
 * sz - {<OpenLayers.Size>|Object} The element width and height,
 *                                 OpenLayers.Size or an object with a
 *                                 'w' and 'h' properties.
 * imgURL - {String} A url pointing to an image to use as a 
 *                   background image.
 * position - {String} The style.position value. eg: absolute,
 *                     relative etc.
 * border - {String} The the style.border value. 
 *                   eg: 2px solid black
 * overflow - {String} The style.overflow value. Eg. hidden
 * opacity - {Float} Fractional value (0.0 - 1.0)
 * 
 * Returns: 
 * {DOMElement} A DOM Div created with the specified attributes.
 */
OpenLayers.Util.createDiv = function(id, px, sz, imgURL, position, 
                                     border, overflow, opacity) {

    var dom = document.createElement('div');

    if (imgURL) {
        dom.style.backgroundImage = 'url(' + imgURL + ')';
    }

    //set generic properties
    if (!id) {
        id = OpenLayers.Util.createUniqueID("OpenLayersDiv");
    }
    if (!position) {
        position = "absolute";
    }
    OpenLayers.Util.modifyDOMElement(dom, id, px, sz, position, 
                                     border, overflow, opacity);

    return dom;
};

/**
 * Function: createImage
 * Creates an img element with specific attribute values.
 *  
 * Parameters:
 * id - {String} The id field for the img.  If none assigned one will be
 *               automatically generated.
 * px - {<OpenLayers.Pixel>|Object} The element left and top position,
 *                                  OpenLayers.Pixel or an object with
 *                                  a 'x' and 'y' properties.
 * sz - {<OpenLayers.Size>|Object} The element width and height,
 *                                 OpenLayers.Size or an object with a
 *                                 'w' and 'h' properties.
 * imgURL - {String} The url to use as the image source.
 * position - {String} The style.position value.
 * border - {String} The border to place around the image.
 * opacity - {Float} Fractional value (0.0 - 1.0)
 * delayDisplay - {Boolean} If true waits until the image has been
 *                          loaded.
 * 
 * Returns:
 * {DOMElement} A DOM Image created with the specified attributes.
 */
OpenLayers.Util.createImage = function(id, px, sz, imgURL, position, border,
                                       opacity, delayDisplay) {

    var image = document.createElement("img");

    //set generic properties
    if (!id) {
        id = OpenLayers.Util.createUniqueID("OpenLayersDiv");
    }
    if (!position) {
        position = "relative";
    }
    OpenLayers.Util.modifyDOMElement(image, id, px, sz, position, 
                                     border, null, opacity);

    if (delayDisplay) {
        image.style.display = "none";
        function display() {
            image.style.display = "";
            OpenLayers.Event.stopObservingElement(image);
        }
        OpenLayers.Event.observe(image, "load", display);
        OpenLayers.Event.observe(image, "error", display);
    }
    
    //set special properties
    image.style.alt = id;
    image.galleryImg = "no";
    if (imgURL) {
        image.src = imgURL;
    }
        
    return image;
};

/**
 * Property: IMAGE_RELOAD_ATTEMPTS
 * {Integer} How many times should we try to reload an image before giving up?
 *           Default is 0
 */
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 0;

/**
 * Property: alphaHackNeeded
 * {Boolean} true if the png alpha hack is necessary and possible, false otherwise.
 */
OpenLayers.Util.alphaHackNeeded = null;

/**
 * Function: alphaHack
 * Checks whether it's necessary (and possible) to use the png alpha
 * hack which allows alpha transparency for png images under Internet
 * Explorer.
 * 
 * Returns:
 * {Boolean} true if the png alpha hack is necessary and possible, false otherwise.
 */
OpenLayers.Util.alphaHack = function() {
    if (OpenLayers.Util.alphaHackNeeded == null) {
        var arVersion = navigator.appVersion.split("MSIE");
        var version = parseFloat(arVersion[1]);
        var filter = false;
    
        // IEs4Lin dies when trying to access document.body.filters, because 
        // the property is there, but requires a DLL that can't be provided. This
        // means that we need to wrap this in a try/catch so that this can
        // continue.
    
        try { 
            filter = !!(document.body.filters);
        } catch (e) {}    
    
        OpenLayers.Util.alphaHackNeeded = (filter && 
                                           (version >= 5.5) && (version < 7));
    }
    return OpenLayers.Util.alphaHackNeeded;
};

/** 
 * Function: modifyAlphaImageDiv
 * 
 * Parameters:
 * div - {DOMElement} Div containing Alpha-adjusted Image
 * id - {String}
 * px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with
 *                                  a 'x' and 'y' properties.
 * sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
 *                                 a 'w' and 'h' properties.
 * imgURL - {String}
 * position - {String}
 * border - {String}
 * sizing - {String} 'crop', 'scale', or 'image'. Default is "scale"
 * opacity - {Float} Fractional value (0.0 - 1.0)
 */ 
OpenLayers.Util.modifyAlphaImageDiv = function(div, id, px, sz, imgURL, 
                                               position, border, sizing, 
                                               opacity) {

    OpenLayers.Util.modifyDOMElement(div, id, px, sz, position,
                                     null, null, opacity);

    var img = div.childNodes[0];

    if (imgURL) {
        img.src = imgURL;
    }
    OpenLayers.Util.modifyDOMElement(img, div.id + "_innerImage", null, sz, 
                                     "relative", border);
    
    if (OpenLayers.Util.alphaHack()) {
        if(div.style.display != "none") {
            div.style.display = "inline-block";
        }
        if (sizing == null) {
            sizing = "scale";
        }
        
        div.style.filter = "progid:DXImageTransform.Microsoft" +
                           ".AlphaImageLoader(src='" + img.src + "', " +
                           "sizingMethod='" + sizing + "')";
        if (parseFloat(div.style.opacity) >= 0.0 && 
            parseFloat(div.style.opacity) < 1.0) {
            div.style.filter += " alpha(opacity=" + div.style.opacity * 100 + ")";
        }

        img.style.filter = "alpha(opacity=0)";
    }
};

/** 
 * Function: createAlphaImageDiv
 * 
 * Parameters:
 * id - {String}
 * px - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or an object with
 *                                  a 'x' and 'y' properties.
 * sz - {<OpenLayers.Size>|Object} OpenLayers.Size or an object with
 *                                 a 'w' and 'h' properties.
 * imgURL - {String}
 * position - {String}
 * border - {String}
 * sizing - {String} 'crop', 'scale', or 'image'. Default is "scale"
 * opacity - {Float} Fractional value (0.0 - 1.0)
 * delayDisplay - {Boolean} If true waits until the image has been
 *                          loaded.
 * 
 * Returns:
 * {DOMElement} A DOM Div created with a DOM Image inside it. If the hack is 
 *              needed for transparency in IE, it is added.
 */ 
OpenLayers.Util.createAlphaImageDiv = function(id, px, sz, imgURL, 
                                               position, border, sizing, 
                                               opacity, delayDisplay) {
    
    var div = OpenLayers.Util.createDiv();
    var img = OpenLayers.Util.createImage(null, null, null, null, null, null, 
                                          null, delayDisplay);
    img.className = "olAlphaImg";
    div.appendChild(img);

    OpenLayers.Util.modifyAlphaImageDiv(div, id, px, sz, imgURL, position, 
                                        border, sizing, opacity);
    
    return div;
};


/** 
 * Function: upperCaseObject
 * Creates a new hashtable and copies over all the keys from the 
 *     passed-in object, but storing them under an uppercased
 *     version of the key at which they were stored.
 * 
 * Parameters: 
 * object - {Object}
 * 
 * Returns: 
 * {Object} A new Object with all the same keys but uppercased
 */
OpenLayers.Util.upperCaseObject = function (object) {
    var uObject = {};
    for (var key in object) {
        uObject[key.toUpperCase()] = object[key];
    }
    return uObject;
};

/** 
 * Function: applyDefaults
 * Takes an object and copies any properties that don't exist from
 *     another properties, by analogy with OpenLayers.Util.extend() from
 *     Prototype.js.
 * 
 * Parameters:
 * to - {Object} The destination object.
 * from - {Object} The source object.  Any properties of this object that
 *     are undefined in the to object will be set on the to object.
 *
 * Returns:
 * {Object} A reference to the to object.  Note that the to argument is modified
 *     in place and returned by this function.
 */
OpenLayers.Util.applyDefaults = function (to, from) {
    to = to || {};
    /*
     * FF/Windows < 2.0.0.13 reports "Illegal operation on WrappedNative
     * prototype object" when calling hawOwnProperty if the source object is an
     * instance of window.Event.
     */
    var fromIsEvt = typeof window.Event == "function"
                    && from instanceof window.Event;

    for (var key in from) {
        if (to[key] === undefined ||
            (!fromIsEvt && from.hasOwnProperty
             && from.hasOwnProperty(key) && !to.hasOwnProperty(key))) {
            to[key] = from[key];
        }
    }
    /**
     * IE doesn't include the toString property when iterating over an object's
     * properties with the for(property in object) syntax.  Explicitly check if
     * the source has its own toString property.
     */
    if(!fromIsEvt && from && from.hasOwnProperty
       && from.hasOwnProperty('toString') && !to.hasOwnProperty('toString')) {
        to.toString = from.toString;
    }
    
    return to;
};

/**
 * Function: getParameterString
 * 
 * Parameters:
 * params - {Object}
 * 
 * Returns:
 * {String} A concatenation of the properties of an object in 
 *          http parameter notation. 
 *          (ex. <i>"key1=value1&key2=value2&key3=value3"</i>)
 *          If a parameter is actually a list, that parameter will then
 *          be set to a comma-seperated list of values (foo,bar) instead
 *          of being URL escaped (foo%3Abar). 
 */
OpenLayers.Util.getParameterString = function(params) {
    var paramsArray = [];
    
    for (var key in params) {
      var value = params[key];
      if ((value != null) && (typeof value != 'function')) {
        var encodedValue;
        if (typeof value == 'object' && value.constructor == Array) {
          /* value is an array; encode items and separate with "," */
          var encodedItemArray = [];
          var item;
          for (var itemIndex=0, len=value.length; itemIndex<len; itemIndex++) {
            item = value[itemIndex];
            encodedItemArray.push(encodeURIComponent(
                (item === null || item === undefined) ? "" : item)
            );
          }
          encodedValue = encodedItemArray.join(",");
        }
        else {
          /* value is a string; simply encode */
          encodedValue = encodeURIComponent(value);
        }
        paramsArray.push(encodeURIComponent(key) + "=" + encodedValue);
      }
    }
    
    return paramsArray.join("&");
};

/**
 * Function: urlAppend
 * Appends a parameter string to a url. This function includes the logic for
 * using the appropriate character (none, & or ?) to append to the url before
 * appending the param string.
 * 
 * Parameters:
 * url - {String} The url to append to
 * paramStr - {String} The param string to append
 * 
 * Returns:
 * {String} The new url
 */
OpenLayers.Util.urlAppend = function(url, paramStr) {
    var newUrl = url;
    if(paramStr) {
        var parts = (url + " ").split(/[?&]/);
        newUrl += (parts.pop() === " " ?
            paramStr :
            parts.length ? "&" + paramStr : "?" + paramStr);
    }
    return newUrl;
};

/** 
 * Function: getImagesLocation
 * 
 * Returns:
 * {String} The fully formatted image location string
 */
OpenLayers.Util.getImagesLocation = function() {
    return OpenLayers.ImgPath || (OpenLayers._getScriptLocation() + "img/");
};

/** 
 * Function: getImageLocation
 * 
 * Returns:
 * {String} The fully formatted location string for a specified image
 */
OpenLayers.Util.getImageLocation = function(image) {
    return OpenLayers.Util.getImagesLocation() + image;
};


/** 
 * Function: Try
 * Execute functions until one of them doesn't throw an error. 
 *     Capitalized because "try" is a reserved word in JavaScript.
 *     Taken directly from OpenLayers.Util.Try()
 * 
 * Parameters:
 * [*] - {Function} Any number of parameters may be passed to Try()
 *    It will attempt to execute each of them until one of them 
 *    successfully executes. 
 *    If none executes successfully, returns null.
 * 
 * Returns:
 * {*} The value returned by the first successfully executed function.
 */
OpenLayers.Util.Try = function() {
    var returnValue = null;

    for (var i=0, len=arguments.length; i<len; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) {}
    }

    return returnValue;
};

/**
 * Function: getXmlNodeValue
 * 
 * Parameters:
 * node - {XMLNode}
 * 
 * Returns:
 * {String} The text value of the given node, without breaking in firefox or IE
 */
OpenLayers.Util.getXmlNodeValue = function(node) {
    var val = null;
    OpenLayers.Util.Try( 
        function() {
            val = node.text;
            if (!val) {
                val = node.textContent;
            }
            if (!val) {
                val = node.firstChild.nodeValue;
            }
        }, 
        function() {
            val = node.textContent;
        }); 
    return val;
};

/** 
 * Function: mouseLeft
 * 
 * Parameters:
 * evt - {Event}
 * div - {HTMLDivElement}
 * 
 * Returns:
 * {Boolean}
 */
OpenLayers.Util.mouseLeft = function (evt, div) {
    // start with the element to which the mouse has moved
    var target = (evt.relatedTarget) ? evt.relatedTarget : evt.toElement;
    // walk up the DOM tree.
    while (target != div && target != null) {
        target = target.parentNode;
    }
    // if the target we stop at isn't the div, then we've left the div.
    return (target != div);
};

/**
 * Property: precision
 * {Number} The number of significant digits to retain to avoid
 * floating point precision errors.
 *
 * We use 14 as a "safe" default because, although IEEE 754 double floats
 * (standard on most modern operating systems) support up to about 16
 * significant digits, 14 significant digits are sufficient to represent
 * sub-millimeter accuracy in any coordinate system that anyone is likely to
 * use with OpenLayers.
 *
 * If DEFAULT_PRECISION is set to 0, the original non-truncating behavior
 * of OpenLayers <2.8 is preserved. Be aware that this will cause problems
 * with certain projections, e.g. spherical Mercator.
 *
 */
OpenLayers.Util.DEFAULT_PRECISION = 14;

/**
 * Function: toFloat
 * Convenience method to cast an object to a Number, rounded to the
 * desired floating point precision.
 *
 * Parameters:
 * number    - {Number} The number to cast and round.
 * precision - {Number} An integer suitable for use with
 *      Number.toPrecision(). Defaults to OpenLayers.Util.DEFAULT_PRECISION.
 *      If set to 0, no rounding is performed.
 *
 * Returns:
 * {Number} The cast, rounded number.
 */
OpenLayers.Util.toFloat = function (number, precision) {
    if (precision == null) {
        precision = OpenLayers.Util.DEFAULT_PRECISION;
    }
    if (typeof number !== "number") {
        number = parseFloat(number);
    }
    return precision === 0 ? number :
                             parseFloat(number.toPrecision(precision));
};

/**
 * Function: rad
 * 
 * Parameters:
 * x - {Float}
 * 
 * Returns:
 * {Float}
 */
OpenLayers.Util.rad = function(x) {return x*Math.PI/180;};

/**
 * Function: deg
 *
 * Parameters:
 * x - {Float}
 *
 * Returns:
 * {Float}
 */
OpenLayers.Util.deg = function(x) {return x*180/Math.PI;};

/**
 * Property: VincentyConstants
 * {Object} Constants for Vincenty functions.
 */
OpenLayers.Util.VincentyConstants = {
    a: 6378137,
    b: 6356752.3142,
    f: 1/298.257223563
};

/**
 * APIFunction: distVincenty
 * Given two objects representing points with geographic coordinates, this
 *     calculates the distance between those points on the surface of an
 *     ellipsoid.
 *
 * Parameters:
 * p1 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties)
 * p2 - {<OpenLayers.LonLat>} (or any object with both .lat, .lon properties)
 *
 * Returns:
 * {Float} The distance (in km) between the two input points as measured on an
 *     ellipsoid.  Note that the input point objects must be in geographic
 *     coordinates (decimal degrees) and the return distance is in kilometers.
 */
OpenLayers.Util.distVincenty = function(p1, p2) {
    var ct = OpenLayers.Util.VincentyConstants;
    var a = ct.a, b = ct.b, f = ct.f;

    var L = OpenLayers.Util.rad(p2.lon - p1.lon);
    var U1 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p1.lat)));
    var U2 = Math.atan((1-f) * Math.tan(OpenLayers.Util.rad(p2.lat)));
    var sinU1 = Math.sin(U1), cosU1 = Math.cos(U1);
    var sinU2 = Math.sin(U2), cosU2 = Math.cos(U2);
    var lambda = L, lambdaP = 2*Math.PI;
    var iterLimit = 20;
    while (Math.abs(lambda-lambdaP) > 1e-12 && --iterLimit>0) {
        var sinLambda = Math.sin(lambda), cosLambda = Math.cos(lambda);
        var sinSigma = Math.sqrt((cosU2*sinLambda) * (cosU2*sinLambda) +
        (cosU1*sinU2-sinU1*cosU2*cosLambda) * (cosU1*sinU2-sinU1*cosU2*cosLambda));
        if (sinSigma==0) {
            return 0;  // co-incident points
        }
        var cosSigma = sinU1*sinU2 + cosU1*cosU2*cosLambda;
        var sigma = Math.atan2(sinSigma, cosSigma);
        var alpha = Math.asin(cosU1 * cosU2 * sinLambda / sinSigma);
        var cosSqAlpha = Math.cos(alpha) * Math.cos(alpha);
        var cos2SigmaM = cosSigma - 2*sinU1*sinU2/cosSqAlpha;
        var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
        lambdaP = lambda;
        lambda = L + (1-C) * f * Math.sin(alpha) *
        (sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));
    }
    if (iterLimit==0) {
        return NaN;  // formula failed to converge
    }
    var uSq = cosSqAlpha * (a*a - b*b) / (b*b);
    var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
    var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));
    var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
        B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
    var s = b*A*(sigma-deltaSigma);
    var d = s.toFixed(3)/1000; // round to 1mm precision
    return d;
};

/**
 * APIFunction: destinationVincenty
 * Calculate destination point given start point lat/long (numeric degrees),
 * bearing (numeric degrees) & distance (in m).
 * Adapted from Chris Veness work, see
 * http://www.movable-type.co.uk/scripts/latlong-vincenty-direct.html
 *
 * Parameters:
 * lonlat  - {<OpenLayers.LonLat>} (or any object with both .lat, .lon
 *     properties) The start point.
 * brng     - {Float} The bearing (degrees).
 * dist     - {Float} The ground distance (meters).
 *
 * Returns:
 * {<OpenLayers.LonLat>} The destination point.
 */
OpenLayers.Util.destinationVincenty = function(lonlat, brng, dist) {
    var u = OpenLayers.Util;
    var ct = u.VincentyConstants;
    var a = ct.a, b = ct.b, f = ct.f;

    var lon1 = lonlat.lon;
    var lat1 = lonlat.lat;

    var s = dist;
    var alpha1 = u.rad(brng);
    var sinAlpha1 = Math.sin(alpha1);
    var cosAlpha1 = Math.cos(alpha1);

    var tanU1 = (1-f) * Math.tan(u.rad(lat1));
    var cosU1 = 1 / Math.sqrt((1 + tanU1*tanU1)), sinU1 = tanU1*cosU1;
    var sigma1 = Math.atan2(tanU1, cosAlpha1);
    var sinAlpha = cosU1 * sinAlpha1;
    var cosSqAlpha = 1 - sinAlpha*sinAlpha;
    var uSq = cosSqAlpha * (a*a - b*b) / (b*b);
    var A = 1 + uSq/16384*(4096+uSq*(-768+uSq*(320-175*uSq)));
    var B = uSq/1024 * (256+uSq*(-128+uSq*(74-47*uSq)));

    var sigma = s / (b*A), sigmaP = 2*Math.PI;
    while (Math.abs(sigma-sigmaP) > 1e-12) {
        var cos2SigmaM = Math.cos(2*sigma1 + sigma);
        var sinSigma = Math.sin(sigma);
        var cosSigma = Math.cos(sigma);
        var deltaSigma = B*sinSigma*(cos2SigmaM+B/4*(cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)-
            B/6*cos2SigmaM*(-3+4*sinSigma*sinSigma)*(-3+4*cos2SigmaM*cos2SigmaM)));
        sigmaP = sigma;
        sigma = s / (b*A) + deltaSigma;
    }

    var tmp = sinU1*sinSigma - cosU1*cosSigma*cosAlpha1;
    var lat2 = Math.atan2(sinU1*cosSigma + cosU1*sinSigma*cosAlpha1,
        (1-f)*Math.sqrt(sinAlpha*sinAlpha + tmp*tmp));
    var lambda = Math.atan2(sinSigma*sinAlpha1, cosU1*cosSigma - sinU1*sinSigma*cosAlpha1);
    var C = f/16*cosSqAlpha*(4+f*(4-3*cosSqAlpha));
    var L = lambda - (1-C) * f * sinAlpha *
        (sigma + C*sinSigma*(cos2SigmaM+C*cosSigma*(-1+2*cos2SigmaM*cos2SigmaM)));

    var revAz = Math.atan2(sinAlpha, -tmp);  // final bearing

    return new OpenLayers.LonLat(lon1+u.deg(L), u.deg(lat2));
};

/**
 * Function: getParameters
 * Parse the parameters from a URL or from the current page itself into a 
 *     JavaScript Object. Note that parameter values with commas are separated
 *     out into an Array.
 * 
 * Parameters:
 * url - {String} Optional url used to extract the query string.
 *                If url is null or is not supplied, query string is taken 
 *                from the page location.
 * 
 * Returns:
 * {Object} An object of key/value pairs from the query string.
 */
OpenLayers.Util.getParameters = function(url) {
    // if no url specified, take it from the location bar
    url = (url === null || url === undefined) ? window.location.href : url;

    //parse out parameters portion of url string
    var paramsString = "";
    if (OpenLayers.String.contains(url, '?')) {
        var start = url.indexOf('?') + 1;
        var end = OpenLayers.String.contains(url, "#") ?
                    url.indexOf('#') : url.length;
        paramsString = url.substring(start, end);
    }

    var parameters = {};
    var pairs = paramsString.split(/[&;]/);
    for(var i=0, len=pairs.length; i<len; ++i) {
        var keyValue = pairs[i].split('=');
        if (keyValue[0]) {

            var key = keyValue[0];
            try {
                key = decodeURIComponent(key);
            } catch (err) {
                key = unescape(key);
            }
            
            // being liberal by replacing "+" with " "
            var value = (keyValue[1] || '').replace(/\+/g, " ");

            try {
                value = decodeURIComponent(value);
            } catch (err) {
                value = unescape(value);
            }
            
            // follow OGC convention of comma delimited values
            value = value.split(",");

            //if there's only one value, do not return as array                    
            if (value.length == 1) {
                value = value[0];
            }                
            
            parameters[key] = value;
         }
     }
    return parameters;
};

/**
 * Property: lastSeqID
 * {Integer} The ever-incrementing count variable.
 *           Used for generating unique ids.
 */
OpenLayers.Util.lastSeqID = 0;

/**
 * Function: createUniqueID
 * Create a unique identifier for this session.  Each time this function
 *     is called, a counter is incremented.  The return will be the optional
 *     prefix (defaults to "id_") appended with the counter value.
 * 
 * Parameters:
 * prefix - {String} Optional string to prefix unique id. Default is "id_".
 * 
 * Returns:
 * {String} A unique id string, built on the passed in prefix.
 */
OpenLayers.Util.createUniqueID = function(prefix) {
    if (prefix == null) {
        prefix = "id_";
    }
    OpenLayers.Util.lastSeqID += 1; 
    return prefix + OpenLayers.Util.lastSeqID;        
};

/**
 * Constant: INCHES_PER_UNIT
 * {Object} Constant inches per unit -- borrowed from MapServer mapscale.c
 * derivation of nautical miles from http://en.wikipedia.org/wiki/Nautical_mile
 * Includes the full set of units supported by CS-MAP (http://trac.osgeo.org/csmap/)
 * and PROJ.4 (http://trac.osgeo.org/proj/)
 * The hardcoded table is maintain in a CS-MAP source code module named CSdataU.c
 * The hardcoded table of PROJ.4 units are in pj_units.c.
 */
OpenLayers.INCHES_PER_UNIT = { 
    'inches': 1.0,
    'ft': 12.0,
    'mi': 63360.0,
    'm': 39.3701,
    'km': 39370.1,
    'dd': 4374754,
    'yd': 36
};
OpenLayers.INCHES_PER_UNIT["in"]= OpenLayers.INCHES_PER_UNIT.inches;
OpenLayers.INCHES_PER_UNIT["degrees"] = OpenLayers.INCHES_PER_UNIT.dd;
OpenLayers.INCHES_PER_UNIT["nmi"] = 1852 * OpenLayers.INCHES_PER_UNIT.m;

// Units from CS-Map
OpenLayers.METERS_PER_INCH = 0.02540005080010160020;
OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, {
    "Inch": OpenLayers.INCHES_PER_UNIT.inches,
    "Meter": 1.0 / OpenLayers.METERS_PER_INCH,   //EPSG:9001
    "Foot": 0.30480060960121920243 / OpenLayers.METERS_PER_INCH,   //EPSG:9003
    "IFoot": 0.30480000000000000000 / OpenLayers.METERS_PER_INCH,   //EPSG:9002
    "ClarkeFoot": 0.3047972651151 / OpenLayers.METERS_PER_INCH,   //EPSG:9005
    "SearsFoot": 0.30479947153867624624 / OpenLayers.METERS_PER_INCH,   //EPSG:9041
    "GoldCoastFoot": 0.30479971018150881758 / OpenLayers.METERS_PER_INCH,   //EPSG:9094
    "IInch": 0.02540000000000000000 / OpenLayers.METERS_PER_INCH,
    "MicroInch": 0.00002540000000000000 / OpenLayers.METERS_PER_INCH,
    "Mil": 0.00000002540000000000 / OpenLayers.METERS_PER_INCH,
    "Centimeter": 0.01000000000000000000 / OpenLayers.METERS_PER_INCH,
    "Kilometer": 1000.00000000000000000000 / OpenLayers.METERS_PER_INCH,   //EPSG:9036
    "Yard": 0.91440182880365760731 / OpenLayers.METERS_PER_INCH,
    "SearsYard": 0.914398414616029 / OpenLayers.METERS_PER_INCH,   //EPSG:9040
    "IndianYard": 0.91439853074444079983 / OpenLayers.METERS_PER_INCH,   //EPSG:9084
    "IndianYd37": 0.91439523 / OpenLayers.METERS_PER_INCH,   //EPSG:9085
    "IndianYd62": 0.9143988 / OpenLayers.METERS_PER_INCH,   //EPSG:9086
    "IndianYd75": 0.9143985 / OpenLayers.METERS_PER_INCH,   //EPSG:9087
    "IndianFoot": 0.30479951 / OpenLayers.METERS_PER_INCH,   //EPSG:9080
    "IndianFt37": 0.30479841 / OpenLayers.METERS_PER_INCH,   //EPSG:9081
    "IndianFt62": 0.3047996 / OpenLayers.METERS_PER_INCH,   //EPSG:9082
    "IndianFt75": 0.3047995 / OpenLayers.METERS_PER_INCH,   //EPSG:9083
    "Mile": 1609.34721869443738887477 / OpenLayers.METERS_PER_INCH,
    "IYard": 0.91440000000000000000 / OpenLayers.METERS_PER_INCH,   //EPSG:9096
    "IMile": 1609.34400000000000000000 / OpenLayers.METERS_PER_INCH,   //EPSG:9093
    "NautM": 1852.00000000000000000000 / OpenLayers.METERS_PER_INCH,   //EPSG:9030
    "Lat-66": 110943.316488932731 / OpenLayers.METERS_PER_INCH,
    "Lat-83": 110946.25736872234125 / OpenLayers.METERS_PER_INCH,
    "Decimeter": 0.10000000000000000000 / OpenLayers.METERS_PER_INCH,
    "Millimeter": 0.00100000000000000000 / OpenLayers.METERS_PER_INCH,
    "Dekameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH,
    "Decameter": 10.00000000000000000000 / OpenLayers.METERS_PER_INCH,
    "Hectometer": 100.00000000000000000000 / OpenLayers.METERS_PER_INCH,
    "GermanMeter": 1.0000135965 / OpenLayers.METERS_PER_INCH,   //EPSG:9031
    "CaGrid": 0.999738 / OpenLayers.METERS_PER_INCH,
    "ClarkeChain": 20.1166194976 / OpenLayers.METERS_PER_INCH,   //EPSG:9038
    "GunterChain": 20.11684023368047 / OpenLayers.METERS_PER_INCH,   //EPSG:9033
    "BenoitChain": 20.116782494375872 / OpenLayers.METERS_PER_INCH,   //EPSG:9062
    "SearsChain": 20.11676512155 / OpenLayers.METERS_PER_INCH,   //EPSG:9042
    "ClarkeLink": 0.201166194976 / OpenLayers.METERS_PER_INCH,   //EPSG:9039
    "GunterLink": 0.2011684023368047 / OpenLayers.METERS_PER_INCH,   //EPSG:9034
    "BenoitLink": 0.20116782494375872 / OpenLayers.METERS_PER_INCH,   //EPSG:9063
    "SearsLink": 0.2011676512155 / OpenLayers.METERS_PER_INCH,   //EPSG:9043
    "Rod": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
    "IntnlChain": 20.1168 / OpenLayers.METERS_PER_INCH,   //EPSG:9097
    "IntnlLink": 0.201168 / OpenLayers.METERS_PER_INCH,   //EPSG:9098
    "Perch": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
    "Pole": 5.02921005842012 / OpenLayers.METERS_PER_INCH,
    "Furlong": 201.1684023368046 / OpenLayers.METERS_PER_INCH,
    "Rood": 3.778266898 / OpenLayers.METERS_PER_INCH,
    "CapeFoot": 0.3047972615 / OpenLayers.METERS_PER_INCH,
    "Brealey": 375.00000000000000000000 / OpenLayers.METERS_PER_INCH,
    "ModAmFt": 0.304812252984505969011938 / OpenLayers.METERS_PER_INCH,
    "Fathom": 1.8288 / OpenLayers.METERS_PER_INCH,
    "NautM-UK": 1853.184 / OpenLayers.METERS_PER_INCH,
    "50kilometers": 50000.0 / OpenLayers.METERS_PER_INCH,
    "150kilometers": 150000.0 / OpenLayers.METERS_PER_INCH
});

//unit abbreviations supported by PROJ.4
OpenLayers.Util.extend(OpenLayers.INCHES_PER_UNIT, {
    "mm": OpenLayers.INCHES_PER_UNIT["Meter"] / 1000.0,
    "cm": OpenLayers.INCHES_PER_UNIT["Meter"] / 100.0,
    "dm": OpenLayers.INCHES_PER_UNIT["Meter"] * 100.0,
    "km": OpenLayers.INCHES_PER_UNIT["Meter"] * 1000.0,
    "kmi": OpenLayers.INCHES_PER_UNIT["nmi"],    //International Nautical Mile
    "fath": OpenLayers.INCHES_PER_UNIT["Fathom"], //International Fathom
    "ch": OpenLayers.INCHES_PER_UNIT["IntnlChain"],  //International Chain
    "link": OpenLayers.INCHES_PER_UNIT["IntnlLink"], //International Link
    "us-in": OpenLayers.INCHES_PER_UNIT["inches"], //U.S. Surveyor's Inch
    "us-ft": OpenLayers.INCHES_PER_UNIT["Foot"],	//U.S. Surveyor's Foot
    "us-yd": OpenLayers.INCHES_PER_UNIT["Yard"],	//U.S. Surveyor's Yard
    "us-ch": OpenLayers.INCHES_PER_UNIT["GunterChain"], //U.S. Surveyor's Chain
    "us-mi": OpenLayers.INCHES_PER_UNIT["Mile"],   //U.S. Surveyor's Statute Mile
    "ind-yd": OpenLayers.INCHES_PER_UNIT["IndianYd37"],  //Indian Yard
    "ind-ft": OpenLayers.INCHES_PER_UNIT["IndianFt37"],  //Indian Foot
    "ind-ch": 20.11669506 / OpenLayers.METERS_PER_INCH  //Indian Chain
});

/** 
 * Constant: DOTS_PER_INCH
 * {Integer} 72 (A sensible default)
 */
OpenLayers.DOTS_PER_INCH = 72;

/**
 * Function: normalizeScale
 * 
 * Parameters:
 * scale - {float}
 * 
 * Returns:
 * {Float} A normalized scale value, in 1 / X format. 
 *         This means that if a value less than one ( already 1/x) is passed
 *         in, it just returns scale directly. Otherwise, it returns 
 *         1 / scale
 */
OpenLayers.Util.normalizeScale = function (scale) {
    var normScale = (scale > 1.0) ? (1.0 / scale) 
                                  : scale;
    return normScale;
};

/**
 * Function: getResolutionFromScale
 * 
 * Parameters:
 * scale - {Float}
 * units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable.
 *                  Default is degrees
 * 
 * Returns:
 * {Float} The corresponding resolution given passed-in scale and unit 
 *     parameters.  If the given scale is falsey, the returned resolution will
 *     be undefined.
 */
OpenLayers.Util.getResolutionFromScale = function (scale, units) {
    var resolution;
    if (scale) {
        if (units == null) {
            units = "degrees";
        }
        var normScale = OpenLayers.Util.normalizeScale(scale);
        resolution = 1 / (normScale * OpenLayers.INCHES_PER_UNIT[units]
                                        * OpenLayers.DOTS_PER_INCH);        
    }
    return resolution;
};

/**
 * Function: getScaleFromResolution
 * 
 * Parameters:
 * resolution - {Float}
 * units - {String} Index into OpenLayers.INCHES_PER_UNIT hashtable.
 *                  Default is degrees
 * 
 * Returns:
 * {Float} The corresponding scale given passed-in resolution and unit 
 *         parameters.
 */
OpenLayers.Util.getScaleFromResolution = function (resolution, units) {

    if (units == null) {
        units = "degrees";
    }

    var scale = resolution * OpenLayers.INCHES_PER_UNIT[units] *
                    OpenLayers.DOTS_PER_INCH;
    return scale;
};

/**
 * Function: pagePosition
 * Calculates the position of an element on the page (see
 * http://code.google.com/p/doctype/wiki/ArticlePageOffset)
 *
 * OpenLayers.Util.pagePosition is based on Yahoo's getXY method, which is
 * Copyright (c) 2006, Yahoo! Inc.
 * All rights reserved.
 * 
 * Redistribution and use of this software in source and binary forms, with or
 * without modification, are permitted provided that the following conditions
 * are met:
 * 
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * 
 * * Neither the name of Yahoo! Inc. nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission of Yahoo! Inc.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * Parameters:
 * forElement - {DOMElement}
 * 
 * Returns:
 * {Array} two item array, Left value then Top value.
 */
OpenLayers.Util.pagePosition =  function(forElement) {
    // NOTE: If element is hidden (display none or disconnected or any the
    // ancestors are hidden) we get (0,0) by default but we still do the
    // accumulation of scroll position.

    var pos = [0, 0];
    var viewportElement = OpenLayers.Util.getViewportElement();
    if (!forElement || forElement == window || forElement == viewportElement) {
        // viewport is always at 0,0 as that defined the coordinate system for
        // this function - this avoids special case checks in the code below
        return pos;
    }

    // Gecko browsers normally use getBoxObjectFor to calculate the position.
    // When invoked for an element with an implicit absolute position though it
    // can be off by one. Therefore the recursive implementation is used in
    // those (relatively rare) cases.
    var BUGGY_GECKO_BOX_OBJECT =
        OpenLayers.IS_GECKO && document.getBoxObjectFor &&
        OpenLayers.Element.getStyle(forElement, 'position') == 'absolute' &&
        (forElement.style.top == '' || forElement.style.left == '');

    var parent = null;
    var box;

    if (forElement.getBoundingClientRect) { // IE
        box = forElement.getBoundingClientRect();
        var scrollTop = viewportElement.scrollTop;
        var scrollLeft = viewportElement.scrollLeft;

        pos[0] = box.left + scrollLeft;
        pos[1] = box.top + scrollTop;

    } else if (document.getBoxObjectFor && !BUGGY_GECKO_BOX_OBJECT) { // gecko
        // Gecko ignores the scroll values for ancestors, up to 1.9.  See:
        // https://bugzilla.mozilla.org/show_bug.cgi?id=328881 and
        // https://bugzilla.mozilla.org/show_bug.cgi?id=330619

        box = document.getBoxObjectFor(forElement);
        var vpBox = document.getBoxObjectFor(viewportElement);
        pos[0] = box.screenX - vpBox.screenX;
        pos[1] = box.screenY - vpBox.screenY;

    } else { // safari/opera
        pos[0] = forElement.offsetLeft;
        pos[1] = forElement.offsetTop;
        parent = forElement.offsetParent;
        if (parent != forElement) {
            while (parent) {
                pos[0] += parent.offsetLeft;
                pos[1] += parent.offsetTop;
                parent = parent.offsetParent;
            }
        }

        var browser = OpenLayers.BROWSER_NAME;

        // opera & (safari absolute) incorrectly account for body offsetTop
        if (browser == "opera" || (browser == "safari" &&
              OpenLayers.Element.getStyle(forElement, 'position') == 'absolute')) {
            pos[1] -= document.body.offsetTop;
        }

        // accumulate the scroll positions for everything but the body element
        parent = forElement.offsetParent;
        while (parent && parent != document.body) {
            pos[0] -= parent.scrollLeft;
            // see https://bugs.opera.com/show_bug.cgi?id=249965
            if (browser != "opera" || parent.tagName != 'TR') {
                pos[1] -= parent.scrollTop;
            }
            parent = parent.offsetParent;
        }
    }
    
    return pos;
};

/**
 * Function: getViewportElement
 * Returns die viewport element of the document. The viewport element is
 * usually document.documentElement, except in IE,where it is either
 * document.body or document.documentElement, depending on the document's
 * compatibility mode (see
 * http://code.google.com/p/doctype/wiki/ArticleClientViewportElement)
 *
 * Returns:
 * {DOMElement}
 */
OpenLayers.Util.getViewportElement = function() {
    var viewportElement = arguments.callee.viewportElement;
    if (viewportElement == undefined) {
        viewportElement = (OpenLayers.BROWSER_NAME == "msie" &&
            document.compatMode != 'CSS1Compat') ? document.body :
            document.documentElement;
        arguments.callee.viewportElement = viewportElement;
    }
    return viewportElement;
};

/** 
 * Function: isEquivalentUrl
 * Test two URLs for equivalence. 
 * 
 * Setting 'ignoreCase' allows for case-independent comparison.
 * 
 * Comparison is based on: 
 *  - Protocol
 *  - Host (evaluated without the port)
 *  - Port (set 'ignorePort80' to ignore "80" values)
 *  - Hash ( set 'ignoreHash' to disable)
 *  - Pathname (for relative <-> absolute comparison) 
 *  - Arguments (so they can be out of order)
 *  
 * Parameters:
 * url1 - {String}
 * url2 - {String}
 * options - {Object} Allows for customization of comparison:
 *                    'ignoreCase' - Default is True
 *                    'ignorePort80' - Default is True
 *                    'ignoreHash' - Default is True
 *
 * Returns:
 * {Boolean} Whether or not the two URLs are equivalent
 */
OpenLayers.Util.isEquivalentUrl = function(url1, url2, options) {
    options = options || {};

    OpenLayers.Util.applyDefaults(options, {
        ignoreCase: true,
        ignorePort80: true,
        ignoreHash: true
    });

    var urlObj1 = OpenLayers.Util.createUrlObject(url1, options);
    var urlObj2 = OpenLayers.Util.createUrlObject(url2, options);

    //compare all keys except for "args" (treated below)
    for(var key in urlObj1) {
        if(key !== "args") {
            if(urlObj1[key] != urlObj2[key]) {
                return false;
            }
        }
    }

    // compare search args - irrespective of order
    for(var key in urlObj1.args) {
        if(urlObj1.args[key] != urlObj2.args[key]) {
            return false;
        }
        delete urlObj2.args[key];
    }
    // urlObj2 shouldn't have any args left
    for(var key in urlObj2.args) {
        return false;
    }
    
    return true;
};

/**
 * Function: createUrlObject
 * 
 * Parameters:
 * url - {String}
 * options - {Object} A hash of options.
 *
 * Valid options:
 *   ignoreCase - {Boolean} lowercase url,
 *   ignorePort80 - {Boolean} don't include explicit port if port is 80,
 *   ignoreHash - {Boolean} Don't include part of url after the hash (#).
 * 
 * Returns:
 * {Object} An object with separate url, a, port, host, and args parsed out 
 *          and ready for comparison
 */
OpenLayers.Util.createUrlObject = function(url, options) {
    options = options || {};

    // deal with relative urls first
    if(!(/^\w+:\/\//).test(url)) {
        var loc = window.location;
        var port = loc.port ? ":" + loc.port : "";
        var fullUrl = loc.protocol + "//" + loc.host.split(":").shift() + port;
        if(url.indexOf("/") === 0) {
            // full pathname
            url = fullUrl + url;
        } else {
            // relative to current path
            var parts = loc.pathname.split("/");
            parts.pop();
            url = fullUrl + parts.join("/") + "/" + url;
        }
    }
  
    if (options.ignoreCase) {
        url = url.toLowerCase(); 
    }

    var a = document.createElement('a');
    a.href = url;
    
    var urlObject = {};
    
    //host (without port)
    urlObject.host = a.host.split(":").shift();

    //protocol
    urlObject.protocol = a.protocol;  

    //port (get uniform browser behavior with port 80 here)
    if(options.ignorePort80) {
        urlObject.port = (a.port == "80" || a.port == "0") ? "" : a.port;
    } else {
        urlObject.port = (a.port == "" || a.port == "0") ? "80" : a.port;
    }

    //hash
    urlObject.hash = (options.ignoreHash || a.hash === "#") ? "" : a.hash;  
    
    //args
    var queryString = a.search;
    if (!queryString) {
        var qMark = url.indexOf("?");
        queryString = (qMark != -1) ? url.substr(qMark) : "";
    }
    urlObject.args = OpenLayers.Util.getParameters(queryString);

    // pathname
    //
    // This is a workaround for Internet Explorer where
    // window.location.pathname has a leading "/", but
    // a.pathname has no leading "/".
    urlObject.pathname = (a.pathname.charAt(0) == "/") ? a.pathname : "/" + a.pathname;
    
    return urlObject; 
};
 
/**
 * Function: removeTail
 * Takes a url and removes everything after the ? and #
 * 
 * Parameters:
 * url - {String} The url to process
 * 
 * Returns:
 * {String} The string with all queryString and Hash removed
 */
OpenLayers.Util.removeTail = function(url) {
    var head = null;
    
    var qMark = url.indexOf("?");
    var hashMark = url.indexOf("#");

    if (qMark == -1) {
        head = (hashMark != -1) ? url.substr(0,hashMark) : url;
    } else {
        head = (hashMark != -1) ? url.substr(0,Math.min(qMark, hashMark)) 
                                  : url.substr(0, qMark);
    }
    return head;
};

/**
 * Constant: IS_GECKO
 * {Boolean} True if the userAgent reports the browser to use the Gecko engine
 */
OpenLayers.IS_GECKO = (function() {
    var ua = navigator.userAgent.toLowerCase();
    return ua.indexOf("webkit") == -1 && ua.indexOf("gecko") != -1;
})();

/**
 * Constant: CANVAS_SUPPORTED
 * {Boolean} True if canvas 2d is supported.
 */
OpenLayers.CANVAS_SUPPORTED = (function() {
    var elem = document.createElement('canvas');
    return !!(elem.getContext && elem.getContext('2d'));
})();

/**
 * Constant: BROWSER_NAME
 * {String}
 * A substring of the navigator.userAgent property.  Depending on the userAgent
 *     property, this will be the empty string or one of the following:
 *     * "opera" -- Opera
 *     * "msie"  -- Internet Explorer
 *     * "safari" -- Safari
 *     * "firefox" -- Firefox
 *     * "mozilla" -- Mozilla
 */
OpenLayers.BROWSER_NAME = (function() {
    var name = "";
    var ua = navigator.userAgent.toLowerCase();
    if (ua.indexOf("opera") != -1) {
        name = "opera";
    } else if (ua.indexOf("msie") != -1) {
        name = "msie";
    } else if (ua.indexOf("safari") != -1) {
        name = "safari";
    } else if (ua.indexOf("mozilla") != -1) {
        if (ua.indexOf("firefox") != -1) {
            name = "firefox";
        } else {
            name = "mozilla";
        }
    }
    return name;
})();

/**
 * Function: getBrowserName
 * 
 * Returns:
 * {String} A string which specifies which is the current 
 *          browser in which we are running. 
 * 
 *          Currently-supported browser detection and codes:
 *           * 'opera' -- Opera
 *           * 'msie'  -- Internet Explorer
 *           * 'safari' -- Safari
 *           * 'firefox' -- Firefox
 *           * 'mozilla' -- Mozilla
 * 
 *          If we are unable to property identify the browser, we 
 *           return an empty string.
 */
OpenLayers.Util.getBrowserName = function() {
    return OpenLayers.BROWSER_NAME;
};

/**
 * Method: getRenderedDimensions
 * Renders the contentHTML offscreen to determine actual dimensions for
 *     popup sizing. As we need layout to determine dimensions the content
 *     is rendered -9999px to the left and absolute to ensure the 
 *     scrollbars do not flicker
 *     
 * Parameters:
 * contentHTML
 * size - {<OpenLayers.Size>} If either the 'w' or 'h' properties is 
 *     specified, we fix that dimension of the div to be measured. This is 
 *     useful in the case where we have a limit in one dimension and must 
 *     therefore meaure the flow in the other dimension.
 * options - {Object}
 *
 * Allowed Options:
 *     displayClass - {String} Optional parameter.  A CSS class name(s) string
 *         to provide the CSS context of the rendered content.
 *     containerElement - {DOMElement} Optional parameter. Insert the HTML to 
 *         this node instead of the body root when calculating dimensions. 
 * 
 * Returns:
 * {<OpenLayers.Size>}
 */
OpenLayers.Util.getRenderedDimensions = function(contentHTML, size, options) {
    
    var w, h;
    
    // create temp container div with restricted size
    var container = document.createElement("div");
    container.style.visibility = "hidden";
        
    var containerElement = (options && options.containerElement) 
    	? options.containerElement : document.body;
    
    // Opera and IE7 can't handle a node with position:aboslute if it inherits
    // position:absolute from a parent.
    var parentHasPositionAbsolute = false;
    var superContainer = null;
    var parent = containerElement;
    while (parent && parent.tagName.toLowerCase()!="body") {
        var parentPosition = OpenLayers.Element.getStyle(parent, "position");
        if(parentPosition == "absolute") {
            parentHasPositionAbsolute = true;
            break;
        } else if (parentPosition && parentPosition != "static") {
            break;
        }
        parent = parent.parentNode;
    }
    if(parentHasPositionAbsolute && (containerElement.clientHeight === 0 || 
                                     containerElement.clientWidth === 0) ){
        superContainer = document.createElement("div");
        superContainer.style.visibility = "hidden";
        superContainer.style.position = "absolute";
        superContainer.style.overflow = "visible";
        superContainer.style.width = document.body.clientWidth + "px";
        superContainer.style.height = document.body.clientHeight + "px";
        superContainer.appendChild(container);
    }
    container.style.position = "absolute";

    //fix a dimension, if specified.
    if (size) {
        if (size.w) {
            w = size.w;
            container.style.width = w + "px";
        } else if (size.h) {
            h = size.h;
            container.style.height = h + "px";
        }
    }

    //add css classes, if specified
    if (options && options.displayClass) {
        container.className = options.displayClass;
    }
    
    // create temp content div and assign content
    var content = document.createElement("div");
    content.innerHTML = contentHTML;
    
    // we need overflow visible when calculating the size
    content.style.overflow = "visible";
    if (content.childNodes) {
        for (var i=0, l=content.childNodes.length; i<l; i++) {
            if (!content.childNodes[i].style) continue;
            content.childNodes[i].style.overflow = "visible";
        }
    }
    
    // add content to restricted container 
    container.appendChild(content);
    
    // append container to body for rendering
    if (superContainer) {
        containerElement.appendChild(superContainer);
    } else {
        containerElement.appendChild(container);
    }
    
    // calculate scroll width of content and add corners and shadow width
    if (!w) {
        w = parseInt(content.scrollWidth);
    
        // update container width to allow height to adjust
        container.style.width = w + "px";
    }        
    // capture height and add shadow and corner image widths
    if (!h) {
        h = parseInt(content.scrollHeight);
    }

    // remove elements
    container.removeChild(content);
    if (superContainer) {
        superContainer.removeChild(container);
        containerElement.removeChild(superContainer);
    } else {
        containerElement.removeChild(container);
    }
    
    return new OpenLayers.Size(w, h);
};

/**
 * APIFunction: getScrollbarWidth
 * This function has been modified by the OpenLayers from the original version,
 *     written by Matthew Eernisse and released under the Apache 2 
 *     license here:
 * 
 *     http://www.fleegix.org/articles/2006/05/30/getting-the-scrollbar-width-in-pixels
 * 
 *     It has been modified simply to cache its value, since it is physically 
 *     impossible that this code could ever run in more than one browser at 
 *     once. 
 * 
 * Returns:
 * {Integer}
 */
OpenLayers.Util.getScrollbarWidth = function() {
    
    var scrollbarWidth = OpenLayers.Util._scrollbarWidth;
    
    if (scrollbarWidth == null) {
        var scr = null;
        var inn = null;
        var wNoScroll = 0;
        var wScroll = 0;
    
        // Outer scrolling div
        scr = document.createElement('div');
        scr.style.position = 'absolute';
        scr.style.top = '-1000px';
        scr.style.left = '-1000px';
        scr.style.width = '100px';
        scr.style.height = '50px';
        // Start with no scrollbar
        scr.style.overflow = 'hidden';
    
        // Inner content div
        inn = document.createElement('div');
        inn.style.width = '100%';
        inn.style.height = '200px';
    
        // Put the inner div in the scrolling div
        scr.appendChild(inn);
        // Append the scrolling div to the doc
        document.body.appendChild(scr);
    
        // Width of the inner div sans scrollbar
        wNoScroll = inn.offsetWidth;
    
        // Add the scrollbar
        scr.style.overflow = 'scroll';
        // Width of the inner div width scrollbar
        wScroll = inn.offsetWidth;
    
        // Remove the scrolling div from the doc
        document.body.removeChild(document.body.lastChild);
    
        // Pixel width of the scroller
        OpenLayers.Util._scrollbarWidth = (wNoScroll - wScroll);
        scrollbarWidth = OpenLayers.Util._scrollbarWidth;
    }

    return scrollbarWidth;
};

/**
 * APIFunction: getFormattedLonLat
 * This function will return latitude or longitude value formatted as 
 *
 * Parameters:
 * coordinate - {Float} the coordinate value to be formatted
 * axis - {String} value of either 'lat' or 'lon' to indicate which axis is to
 *          to be formatted (default = lat)
 * dmsOption - {String} specify the precision of the output can be one of:
 *           'dms' show degrees minutes and seconds
 *           'dm' show only degrees and minutes
 *           'd' show only degrees
 * 
 * Returns:
 * {String} the coordinate value formatted as a string
 */
OpenLayers.Util.getFormattedLonLat = function(coordinate, axis, dmsOption) {
    if (!dmsOption) {
        dmsOption = 'dms';    //default to show degree, minutes, seconds
    }
	
	coordinate = (coordinate+540)%360 - 180; // normalize for sphere being round
	
    var abscoordinate = Math.abs(coordinate);
    var coordinatedegrees = Math.floor(abscoordinate);

    var coordinateminutes = (abscoordinate - coordinatedegrees)/(1/60);
    var tempcoordinateminutes = coordinateminutes;
    coordinateminutes = Math.floor(coordinateminutes);
    var coordinateseconds = (tempcoordinateminutes - coordinateminutes)/(1/60);
    coordinateseconds =  Math.round(coordinateseconds*10);
    coordinateseconds /= 10;

    if( coordinateseconds >= 60) { 
        coordinateseconds -= 60; 
        coordinateminutes += 1; 
        if( coordinateminutes >= 60) { 
            coordinateminutes -= 60; 
            coordinatedegrees += 1; 
        } 
    }
    
    if( coordinatedegrees < 10 ) {
        coordinatedegrees = "0" + coordinatedegrees;
    }
    var str = coordinatedegrees + "\u00B0";

    if (dmsOption.indexOf('dm') >= 0) {
        if( coordinateminutes < 10 ) {
            coordinateminutes = "0" + coordinateminutes;
        }
        str += coordinateminutes + "'";
  
        if (dmsOption.indexOf('dms') >= 0) {
            if( coordinateseconds < 10 ) {
                coordinateseconds = "0" + coordinateseconds;
            }
            str += coordinateseconds + '"';
        }
    }
    
    if (axis == "lon") {
        str += coordinate < 0 ? OpenLayers.i18n("W") : OpenLayers.i18n("E");
    } else {
        str += coordinate < 0 ? OpenLayers.i18n("S") : OpenLayers.i18n("N");
    }
    return str;
};

/* ======================================================================
    OpenLayers/Format.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 */

/**
 * Class: OpenLayers.Format
 * Base class for format reading/writing a variety of formats.  Subclasses
 *     of OpenLayers.Format are expected to have read and write methods.
 */
OpenLayers.Format = OpenLayers.Class({
    
    /**
     * Property: options
     * {Object} A reference to options passed to the constructor.
     */
    options: null,
    
    /**
     * APIProperty: externalProjection
     * {<OpenLayers.Projection>} When passed a externalProjection and
     *     internalProjection, the format will reproject the geometries it
     *     reads or writes. The externalProjection is the projection used by
     *     the content which is passed into read or which comes out of write.
     *     In order to reproject, a projection transformation function for the
     *     specified projections must be available. This support may be 
     *     provided via proj4js or via a custom transformation function. See
     *     {<OpenLayers.Projection.addTransform>} for more information on
     *     custom transformations.
     */
    externalProjection: null,

    /**
     * APIProperty: internalProjection
     * {<OpenLayers.Projection>} When passed a externalProjection and
     *     internalProjection, the format will reproject the geometries it
     *     reads or writes. The internalProjection is the projection used by
     *     the geometries which are returned by read or which are passed into
     *     write.  In order to reproject, a projection transformation function
     *     for the specified projections must be available. This support may be
     *     provided via proj4js or via a custom transformation function. See
     *     {<OpenLayers.Projection.addTransform>} for more information on
     *     custom transformations.
     */
    internalProjection: null,

    /**
     * APIProperty: data
     * {Object} When <keepData> is true, this is the parsed string sent to
     *     <read>.
     */
    data: null,

    /**
     * APIProperty: keepData
     * {Object} Maintain a reference (<data>) to the most recently read data.
     *     Default is false.
     */
    keepData: false,

    /**
     * Constructor: OpenLayers.Format
     * Instances of this class are not useful.  See one of the subclasses.
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *           format
     *
     * Valid options:
     * keepData - {Boolean} If true, upon <read>, the data property will be
     *     set to the parsed object (e.g. the json or xml object).
     *
     * Returns:
     * An instance of OpenLayers.Format
     */
    initialize: function(options) {
        OpenLayers.Util.extend(this, options);
        this.options = options;
    },
    
    /**
     * APIMethod: destroy
     * Clean up.
     */
    destroy: function() {
    },

    /**
     * Method: read
     * Read data from a string, and return an object whose type depends on the
     * subclass. 
     * 
     * Parameters:
     * data - {string} Data to read/parse.
     *
     * Returns:
     * Depends on the subclass
     */
    read: function(data) {
        throw new Error('Read not implemented.');
    },
    
    /**
     * Method: write
     * Accept an object, and return a string. 
     *
     * Parameters:
     * object - {Object} Object to be serialized
     *
     * Returns:
     * {String} A string representation of the object.
     */
    write: function(object) {
        throw new Error('Write not implemented.');
    },

    CLASS_NAME: "OpenLayers.Format"
});     
/* ======================================================================
    OpenLayers/Format/CSWGetRecords.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format.js
 */

/**
 * Class: OpenLayers.Format.CSWGetRecords
 * Default version is 2.0.2.
 *
 * Returns:
 * {<OpenLayers.Format>} A CSWGetRecords format of the given version.
 */
OpenLayers.Format.CSWGetRecords = function(options) {
    options = OpenLayers.Util.applyDefaults(
        options, OpenLayers.Format.CSWGetRecords.DEFAULTS
    );
    var cls = OpenLayers.Format.CSWGetRecords["v"+options.version.replace(/\./g, "_")];
    if(!cls) {
        throw "Unsupported CSWGetRecords version: " + options.version;
    }
    return new cls(options);
};

/**
 * Constant: DEFAULTS
 * {Object} Default properties for the CSWGetRecords format.
 */
OpenLayers.Format.CSWGetRecords.DEFAULTS = {
    "version": "2.0.2"
};
/* ======================================================================
    OpenLayers/Control.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Control
 * Controls affect the display or behavior of the map. They allow everything
 * from panning and zooming to displaying a scale indicator. Controls by 
 * default are added to the map they are contained within however it is
 * possible to add a control to an external div by passing the div in the
 * options parameter.
 * 
 * Example:
 * The following example shows how to add many of the common controls
 * to a map.
 * 
 * > var map = new OpenLayers.Map('map', { controls: [] });
 * >
 * > map.addControl(new OpenLayers.Control.PanZoomBar());
 * > map.addControl(new OpenLayers.Control.LayerSwitcher({'ascending':false}));
 * > map.addControl(new OpenLayers.Control.Permalink());
 * > map.addControl(new OpenLayers.Control.Permalink('permalink'));
 * > map.addControl(new OpenLayers.Control.MousePosition());
 * > map.addControl(new OpenLayers.Control.OverviewMap());
 * > map.addControl(new OpenLayers.Control.KeyboardDefaults());
 *
 * The next code fragment is a quick example of how to intercept 
 * shift-mouse click to display the extent of the bounding box
 * dragged out by the user.  Usually controls are not created
 * in exactly this manner.  See the source for a more complete 
 * example:
 *
 * > var control = new OpenLayers.Control();
 * > OpenLayers.Util.extend(control, {
 * >     draw: function () {
 * >         // this Handler.Box will intercept the shift-mousedown
 * >         // before Control.MouseDefault gets to see it
 * >         this.box = new OpenLayers.Handler.Box( control, 
 * >             {"done": this.notice},
 * >             {keyMask: OpenLayers.Handler.MOD_SHIFT});
 * >         this.box.activate();
 * >     },
 * >
 * >     notice: function (bounds) {
 * >         OpenLayers.Console.userError(bounds);
 * >     }
 * > }); 
 * > map.addControl(control);
 * 
 */
OpenLayers.Control = OpenLayers.Class({

    /** 
     * Property: id 
     * {String} 
     */
    id: null,
    
    /** 
     * Property: map 
     * {<OpenLayers.Map>} this gets set in the addControl() function in
     * OpenLayers.Map 
     */
    map: null,

    /** 
     * APIProperty: div 
     * {DOMElement} The element that contains the control, if not present the 
     *     control is placed inside the map.
     */
    div: null,

    /** 
     * APIProperty: type 
     * {Number} Controls can have a 'type'. The type determines the type of
     * interactions which are possible with them when they are placed in an
     * <OpenLayers.Control.Panel>. 
     */
    type: null, 

    /** 
     * Property: allowSelection
     * {Boolean} By default, controls do not allow selection, because
     * it may interfere with map dragging. If this is true, OpenLayers
     * will not prevent selection of the control.
     * Default is false.
     */
    allowSelection: false,  

    /** 
     * Property: displayClass 
     * {string}  This property is used for CSS related to the drawing of the
     * Control. 
     */
    displayClass: "",
    
    /**
    * APIProperty: title  
    * {string}  This property is used for showing a tooltip over the  
    * Control.  
    */ 
    title: "",

    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     false.
     */
    autoActivate: false,

    /** 
     * APIProperty: active 
     * {Boolean} The control is active (read-only).  Use <activate> and 
     *     <deactivate> to change control state.
     */
    active: null,

    /** 
     * Property: handler 
     * {<OpenLayers.Handler>} null
     */
    handler: null,

    /**
     * APIProperty: eventListeners
     * {Object} If set as an option at construction, the eventListeners
     *     object will be registered with <OpenLayers.Events.on>.  Object
     *     structure must be a listeners object as shown in the example for
     *     the events.on method.
     */
    eventListeners: null,

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Listeners will be called with a reference to an event object.  The
     *     properties of this event depends on exactly what happened.
     *
     * All event objects have at least the following properties:
     * object - {Object} A reference to control.events.object (a reference
     *      to the control).
     * element - {DOMElement} A reference to control.events.element (which
     *      will be null unless documented otherwise).
     *
     * Supported map event types:
     * activate - Triggered when activated.
     * deactivate - Triggered when deactivated.
     */
    events: null,

    /**
     * Constructor: OpenLayers.Control
     * Create an OpenLayers Control.  The options passed as a parameter
     * directly extend the control.  For example passing the following:
     * 
     * > var control = new OpenLayers.Control({div: myDiv});
     *
     * Overrides the default div attribute value of null.
     * 
     * Parameters:
     * options - {Object} 
     */
    initialize: function (options) {
        // We do this before the extend so that instances can override
        // className in options.
        this.displayClass = 
            this.CLASS_NAME.replace("OpenLayers.", "ol").replace(/\./g, "");
        
        OpenLayers.Util.extend(this, options);
        
        this.events = new OpenLayers.Events(this);
        if(this.eventListeners instanceof Object) {
            this.events.on(this.eventListeners);
        }
        if (this.id == null) {
            this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
        }
    },

    /**
     * Method: destroy
     * The destroy method is used to perform any clean up before the control
     * is dereferenced.  Typically this is where event listeners are removed
     * to prevent memory leaks.
     */
    destroy: function () {
        if(this.events) {
            if(this.eventListeners) {
                this.events.un(this.eventListeners);
            }
            this.events.destroy();
            this.events = null;
        }
        this.eventListeners = null;

        // eliminate circular references
        if (this.handler) {
            this.handler.destroy();
            this.handler = null;
        }
        if(this.handlers) {
            for(var key in this.handlers) {
                if(this.handlers.hasOwnProperty(key) &&
                   typeof this.handlers[key].destroy == "function") {
                    this.handlers[key].destroy();
                }
            }
            this.handlers = null;
        }
        if (this.map) {
            this.map.removeControl(this);
            this.map = null;
        }
        this.div = null;
    },

    /** 
     * Method: setMap
     * Set the map property for the control. This is done through an accessor
     * so that subclasses can override this and take special action once 
     * they have their map variable set. 
     *
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        this.map = map;
        if (this.handler) {
            this.handler.setMap(map);
        }
    },
  
    /**
     * Method: draw
     * The draw method is called when the control is ready to be displayed
     * on the page.  If a div has not been created one is created.  Controls
     * with a visual component will almost always want to override this method 
     * to customize the look of control. 
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>} The top-left pixel position of the control
     *      or null.
     *
     * Returns:
     * {DOMElement} A reference to the DIV DOMElement containing the control
     */
    draw: function (px) {
        if (this.div == null) {
            this.div = OpenLayers.Util.createDiv(this.id);
            this.div.className = this.displayClass;
            if (!this.allowSelection) {
                this.div.className += " olControlNoSelect";
                this.div.setAttribute("unselectable", "on", 0);
                this.div.onselectstart = OpenLayers.Function.False; 
            }    
            if (this.title != "") {
                this.div.title = this.title;
            }
        }
        if (px != null) {
            this.position = px.clone();
        }
        this.moveTo(this.position);
        return this.div;
    },

    /**
     * Method: moveTo
     * Sets the left and top style attributes to the passed in pixel 
     * coordinates.
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     */
    moveTo: function (px) {
        if ((px != null) && (this.div != null)) {
            this.div.style.left = px.x + "px";
            this.div.style.top = px.y + "px";
        }
    },

    /**
     * APIMethod: activate
     * Explicitly activates a control and it's associated
     * handler if one has been set.  Controls can be
     * deactivated by calling the deactivate() method.
     * 
     * Returns:
     * {Boolean}  True if the control was successfully activated or
     *            false if the control was already active.
     */
    activate: function () {
        if (this.active) {
            return false;
        }
        if (this.handler) {
            this.handler.activate();
        }
        this.active = true;
        if(this.map) {
            OpenLayers.Element.addClass(
                this.map.viewPortDiv,
                this.displayClass.replace(/ /g, "") + "Active"
            );
        }
        this.events.triggerEvent("activate");
        return true;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivates a control and it's associated handler if any.  The exact
     * effect of this depends on the control itself.
     * 
     * Returns:
     * {Boolean} True if the control was effectively deactivated or false
     *           if the control was already inactive.
     */
    deactivate: function () {
        if (this.active) {
            if (this.handler) {
                this.handler.deactivate();
            }
            this.active = false;
            if(this.map) {
                OpenLayers.Element.removeClass(
                    this.map.viewPortDiv,
                    this.displayClass.replace(/ /g, "") + "Active"
                );
            }
            this.events.triggerEvent("deactivate");
            return true;
        }
        return false;
    },

    CLASS_NAME: "OpenLayers.Control"
});

/**
 * Constant: OpenLayers.Control.TYPE_BUTTON
 */
OpenLayers.Control.TYPE_BUTTON = 1;

/**
 * Constant: OpenLayers.Control.TYPE_TOGGLE
 */
OpenLayers.Control.TYPE_TOGGLE = 2;

/**
 * Constant: OpenLayers.Control.TYPE_TOOL
 */
OpenLayers.Control.TYPE_TOOL   = 3;
/* ======================================================================
    OpenLayers/Events.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Util.js
 */

/**
 * Namespace: OpenLayers.Event
 * Utility functions for event handling.
 */
OpenLayers.Event = {

    /** 
     * Property: observers 
     * {Object} A hashtable cache of the event observers. Keyed by
     * element._eventCacheID 
     */
    observers: false,

    /**
     * Constant: KEY_SPACE
     * {int}
     */
    KEY_SPACE: 32,
    
    /** 
     * Constant: KEY_BACKSPACE 
     * {int} 
     */
    KEY_BACKSPACE: 8,

    /** 
     * Constant: KEY_TAB 
     * {int} 
     */
    KEY_TAB: 9,

    /** 
     * Constant: KEY_RETURN 
     * {int} 
     */
    KEY_RETURN: 13,

    /** 
     * Constant: KEY_ESC 
     * {int} 
     */
    KEY_ESC: 27,

    /** 
     * Constant: KEY_LEFT 
     * {int} 
     */
    KEY_LEFT: 37,

    /** 
     * Constant: KEY_UP 
     * {int} 
     */
    KEY_UP: 38,

    /** 
     * Constant: KEY_RIGHT 
     * {int} 
     */
    KEY_RIGHT: 39,

    /** 
     * Constant: KEY_DOWN 
     * {int} 
     */
    KEY_DOWN: 40,

    /** 
     * Constant: KEY_DELETE 
     * {int} 
     */
    KEY_DELETE: 46,


    /**
     * Method: element
     * Cross browser event element detection.
     * 
     * Parameters:
     * event - {Event} 
     * 
     * Returns:
     * {DOMElement} The element that caused the event 
     */
    element: function(event) {
        return event.target || event.srcElement;
    },

    /**
     * Method: isSingleTouch
     * Determine whether event was caused by a single touch
     *
     * Parameters:
     * event - {Event}
     *
     * Returns:
     * {Boolean}
     */
    isSingleTouch: function(event) {
        return event.touches && event.touches.length == 1;
    },

    /**
     * Method: isMultiTouch
     * Determine whether event was caused by a multi touch
     *
     * Parameters:
     * event - {Event}
     *
     * Returns:
     * {Boolean}
     */
    isMultiTouch: function(event) {
        return event.touches && event.touches.length > 1;
    },

    /**
     * Method: isLeftClick
     * Determine whether event was caused by a left click. 
     *
     * Parameters:
     * event - {Event} 
     * 
     * Returns:
     * {Boolean}
     */
    isLeftClick: function(event) {
        return (((event.which) && (event.which == 1)) ||
                ((event.button) && (event.button == 1)));
    },

    /**
     * Method: isRightClick
     * Determine whether event was caused by a right mouse click. 
     *
     * Parameters:
     * event - {Event} 
     * 
     * Returns:
     * {Boolean}
     */
     isRightClick: function(event) {
        return (((event.which) && (event.which == 3)) ||
                ((event.button) && (event.button == 2)));
    },
     
    /**
     * Method: stop
     * Stops an event from propagating. 
     *
     * Parameters: 
     * event - {Event} 
     * allowDefault - {Boolean} If true, we stop the event chain but 
     *     still allow the default browser behaviour (text selection,
     *     radio-button clicking, etc).  Default is false.
     */
    stop: function(event, allowDefault) {
        
        if (!allowDefault) { 
            if (event.preventDefault) {
                event.preventDefault();
            } else {
                event.returnValue = false;
            }
        }
                
        if (event.stopPropagation) {
            event.stopPropagation();
        } else {
            event.cancelBubble = true;
        }
    },

    /** 
     * Method: findElement
     * 
     * Parameters:
     * event - {Event} 
     * tagName - {String} 
     * 
     * Returns:
     * {DOMElement} The first node with the given tagName, starting from the
     * node the event was triggered on and traversing the DOM upwards
     */
    findElement: function(event, tagName) {
        var element = OpenLayers.Event.element(event);
        while (element.parentNode && (!element.tagName ||
              (element.tagName.toUpperCase() != tagName.toUpperCase()))){
            element = element.parentNode;
        }
        return element;
    },

    /** 
     * Method: observe
     * 
     * Parameters:
     * elementParam - {DOMElement || String} 
     * name - {String} 
     * observer - {function} 
     * useCapture - {Boolean} 
     */
    observe: function(elementParam, name, observer, useCapture) {
        var element = OpenLayers.Util.getElement(elementParam);
        useCapture = useCapture || false;

        if (name == 'keypress' &&
           (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
           || element.attachEvent)) {
            name = 'keydown';
        }

        //if observers cache has not yet been created, create it
        if (!this.observers) {
            this.observers = {};
        }

        //if not already assigned, make a new unique cache ID
        if (!element._eventCacheID) {
            var idPrefix = "eventCacheID_";
            if (element.id) {
                idPrefix = element.id + "_" + idPrefix;
            }
            element._eventCacheID = OpenLayers.Util.createUniqueID(idPrefix);
        }

        var cacheID = element._eventCacheID;

        //if there is not yet a hash entry for this element, add one
        if (!this.observers[cacheID]) {
            this.observers[cacheID] = [];
        }

        //add a new observer to this element's list
        this.observers[cacheID].push({
            'element': element,
            'name': name,
            'observer': observer,
            'useCapture': useCapture
        });

        //add the actual browser event listener
        if (element.addEventListener) {
            element.addEventListener(name, observer, useCapture);
        } else if (element.attachEvent) {
            element.attachEvent('on' + name, observer);
        }
    },

    /** 
     * Method: stopObservingElement
     * Given the id of an element to stop observing, cycle through the 
     *   element's cached observers, calling stopObserving on each one, 
     *   skipping those entries which can no longer be removed.
     * 
     * parameters:
     * elementParam - {DOMElement || String} 
     */
    stopObservingElement: function(elementParam) {
        var element = OpenLayers.Util.getElement(elementParam);
        var cacheID = element._eventCacheID;

        this._removeElementObservers(OpenLayers.Event.observers[cacheID]);
    },

    /**
     * Method: _removeElementObservers
     *
     * Parameters:
     * elementObservers - {Array(Object)} Array of (element, name, 
     *                                         observer, usecapture) objects, 
     *                                         taken directly from hashtable
     */
    _removeElementObservers: function(elementObservers) {
        if (elementObservers) {
            for(var i = elementObservers.length-1; i >= 0; i--) {
                var entry = elementObservers[i];
                var args = new Array(entry.element,
                                     entry.name,
                                     entry.observer,
                                     entry.useCapture);
                var removed = OpenLayers.Event.stopObserving.apply(this, args);
            }
        }
    },

    /**
     * Method: stopObserving
     * 
     * Parameters:
     * elementParam - {DOMElement || String} 
     * name - {String} 
     * observer - {function} 
     * useCapture - {Boolean} 
     *  
     * Returns:
     * {Boolean} Whether or not the event observer was removed
     */
    stopObserving: function(elementParam, name, observer, useCapture) {
        useCapture = useCapture || false;
    
        var element = OpenLayers.Util.getElement(elementParam);
        var cacheID = element._eventCacheID;

        if (name == 'keypress') {
            if ( navigator.appVersion.match(/Konqueror|Safari|KHTML/) || 
                 element.detachEvent) {
              name = 'keydown';
            }
        }

        // find element's entry in this.observers cache and remove it
        var foundEntry = false;
        var elementObservers = OpenLayers.Event.observers[cacheID];
        if (elementObservers) {
    
            // find the specific event type in the element's list
            var i=0;
            while(!foundEntry && i < elementObservers.length) {
                var cacheEntry = elementObservers[i];
    
                if ((cacheEntry.name == name) &&
                    (cacheEntry.observer == observer) &&
                    (cacheEntry.useCapture == useCapture)) {
    
                    elementObservers.splice(i, 1);
                    if (elementObservers.length == 0) {
                        delete OpenLayers.Event.observers[cacheID];
                    }
                    foundEntry = true;
                    break; 
                }
                i++;           
            }
        }
    
        //actually remove the event listener from browser
        if (foundEntry) {
            if (element.removeEventListener) {
                element.removeEventListener(name, observer, useCapture);
            } else if (element && element.detachEvent) {
                element.detachEvent('on' + name, observer);
            }
        }
        return foundEntry;
    },
    
    /** 
     * Method: unloadCache
     * Cycle through all the element entries in the events cache and call
     *   stopObservingElement on each. 
     */
    unloadCache: function() {
        // check for OpenLayers.Event before checking for observers, because
        // OpenLayers.Event may be undefined in IE if no map instance was
        // created
        if (OpenLayers.Event && OpenLayers.Event.observers) {
            for (var cacheID in OpenLayers.Event.observers) {
                var elementObservers = OpenLayers.Event.observers[cacheID];
                OpenLayers.Event._removeElementObservers.apply(this, 
                                                           [elementObservers]);
            }
            OpenLayers.Event.observers = false;
        }
    },

    CLASS_NAME: "OpenLayers.Event"
};

/* prevent memory leaks in IE */
OpenLayers.Event.observe(window, 'unload', OpenLayers.Event.unloadCache, false);

/**
 * Class: OpenLayers.Events
 */
OpenLayers.Events = OpenLayers.Class({

    /** 
     * Constant: BROWSER_EVENTS
     * {Array(String)} supported events 
     */
    BROWSER_EVENTS: [
        "mouseover", "mouseout",
        "mousedown", "mouseup", "mousemove", 
        "click", "dblclick", "rightclick", "dblrightclick",
        "resize", "focus", "blur",
        "touchstart", "touchmove", "touchend",
        "keydown"
    ],

    /** 
     * Property: listeners 
     * {Object} Hashtable of Array(Function): events listener functions  
     */
    listeners: null,

    /** 
     * Property: object 
     * {Object}  the code object issuing application events 
     */
    object: null,

    /** 
     * Property: element 
     * {DOMElement}  the DOM element receiving browser events 
     */
    element: null,

    /** 
     * Property: eventHandler 
     * {Function}  bound event handler attached to elements 
     */
    eventHandler: null,

    /** 
     * APIProperty: fallThrough 
     * {Boolean} 
     */
    fallThrough: null,

    /** 
     * APIProperty: includeXY
     * {Boolean} Should the .xy property automatically be created for browser
     *    mouse events? In general, this should be false. If it is true, then
     *    mouse events will automatically generate a '.xy' property on the 
     *    event object that is passed. (Prior to OpenLayers 2.7, this was true
     *    by default.) Otherwise, you can call the getMousePosition on the
     *    relevant events handler on the object available via the 'evt.object'
     *    property of the evt object. So, for most events, you can call:
     *    function named(evt) { 
     *        this.xy = this.object.events.getMousePosition(evt) 
     *    } 
     *
     *    This option typically defaults to false for performance reasons:
     *    when creating an events object whose primary purpose is to manage
     *    relatively positioned mouse events within a div, it may make
     *    sense to set it to true.
     *
     *    This option is also used to control whether the events object caches
     *    offsets. If this is false, it will not: the reason for this is that
     *    it is only expected to be called many times if the includeXY property
     *    is set to true. If you set this to true, you are expected to clear 
     *    the offset cache manually (using this.clearMouseCache()) if:
     *        the border of the element changes
     *        the location of the element in the page changes
    */
    includeXY: false,      
    
    /**
     * APIProperty: extensions
     * {Object} Event extensions registered with this instance. Keys are
     *     event types, values are {OpenLayers.Events.*} extension instances or
     *     {Boolean} for events that an instantiated extension provides in
     *     addition to the one it was created for.
     *
     * Extensions create an event in addition to browser events, which usually
     * fires when a sequence of browser events is completed. Extensions are
     * automatically instantiated when a listener is registered for an event
     * provided by an extension.
     *
     * Extensions are created in the <OpenLayers.Events> namespace using
     * <OpenLayers.Class>, and named after the event they provide.
     * The constructor receives the target <OpenLayers.Events> instance as
     * argument. Extensions that need to capture browser events before they
     * propagate can register their listeners events using <register>, with
     * {extension: true} as 4th argument.
     *
     * If an extension creates more than one event, an alias for each event
     * type should be created and reference the same class. The constructor
     * should set a reference in the target's extensions registry to itself.
     *
     * Below is a minimal extension that provides the "foostart" and "fooend"
     * event types, which replace the native "click" event type if clicked on
     * an element with the css class "foo":
     *
     * (code)
     *   OpenLayers.Events.foostart = OpenLayers.Class({
     *       initialize: function(target) {
     *           this.target = target;
     *           this.target.register("click", this, this.doStuff, {extension: true});
     *           // only required if extension provides more than one event type
     *           this.target.extensions["foostart"] = true;
     *           this.target.extensions["fooend"] = true;
     *       },
     *       destroy: function() {
     *           var target = this.target;
     *           target.unregister("click", this, this.doStuff);
     *           delete this.target;
     *           // only required if extension provides more than one event type
     *           delete target.extensions["foostart"];
     *           delete target.extensions["fooend"];
     *       },
     *       doStuff: function(evt) {
     *           var propagate = true;
     *           if (OpenLayers.Event.element(evt).className === "foo") {
     *               propagate = false;
     *               var target = this.target;
     *               target.triggerEvent("foostart");
     *               window.setTimeout(function() {
     *                   target.triggerEvent("fooend");
     *               }, 1000);
     *           }
     *           return propagate;
     *       }
     *   });
     *   // only required if extension provides more than one event type
     *   OpenLayers.Events.fooend = OpenLayers.Events.foostart;
     * (end)
     * 
     */
    extensions: null,
    
    /**
     * Property: extensionCount
     * {Object} Keys are event types (like in <listeners>), values are the
     *     number of extension listeners for each event type.
     */
    extensionCount: null,

    /**
     * Method: clearMouseListener
     * A version of <clearMouseCache> that is bound to this instance so that
     *     it can be used with <OpenLayers.Event.observe> and
     *     <OpenLayers.Event.stopObserving>.
     */
    clearMouseListener: null,

    /**
     * Constructor: OpenLayers.Events
     * Construct an OpenLayers.Events object.
     *
     * Parameters:
     * object - {Object} The js object to which this Events object  is being added
     * element - {DOMElement} A dom element to respond to browser events
     * eventTypes - {Array(String)} Deprecated.  Array of custom application
     *     events.  A listener may be registered for any named event, regardless
     *     of the values provided here.
     * fallThrough - {Boolean} Allow events to fall through after these have
     *                         been handled?
     * options - {Object} Options for the events object.
     */
    initialize: function (object, element, eventTypes, fallThrough, options) {
        OpenLayers.Util.extend(this, options);
        this.object     = object;
        this.fallThrough = fallThrough;
        this.listeners  = {};
        this.extensions = {};
        this.extensionCount = {};
        
        // if a dom element is specified, add a listeners list 
        // for browser events on the element and register them
        if (element != null) {
            this.attachToElement(element);
        }
    },

    /**
     * APIMethod: destroy
     */
    destroy: function () {
        for (var e in this.extensions) {
            if (typeof this.extensions[e] !== "boolean") {
                this.extensions[e].destroy();
            }
        }
        this.extensions = null;
        if (this.element) {
            OpenLayers.Event.stopObservingElement(this.element);
            if(this.element.hasScrollEvent) {
                OpenLayers.Event.stopObserving(
                    window, "scroll", this.clearMouseListener
                );
            }
        }
        this.element = null;

        this.listeners = null;
        this.object = null;
        this.fallThrough = null;
        this.eventHandler = null;
    },

    /**
     * APIMethod: addEventType
     * Deprecated.  Any event can be triggered without adding it first.
     * 
     * Parameters:
     * eventName - {String}
     */
    addEventType: function(eventName) {
    },

    /**
     * Method: attachToElement
     *
     * Parameters:
     * element - {HTMLDOMElement} a DOM element to attach browser events to
     */
    attachToElement: function (element) {
        if (this.element) {
            OpenLayers.Event.stopObservingElement(this.element);
        } else {
            // keep a bound copy of handleBrowserEvent() so that we can
            // pass the same function to both Event.observe() and .stopObserving()
            this.eventHandler = OpenLayers.Function.bindAsEventListener(
                this.handleBrowserEvent, this
            );
            
            // to be used with observe and stopObserving
            this.clearMouseListener = OpenLayers.Function.bind(
                this.clearMouseCache, this
            );
        }
        this.element = element;
        for (var i = 0, len = this.BROWSER_EVENTS.length; i < len; i++) {
            // register the event cross-browser
            OpenLayers.Event.observe(
                element, this.BROWSER_EVENTS[i], this.eventHandler
            );
        }
        // disable dragstart in IE so that mousedown/move/up works normally
        OpenLayers.Event.observe(element, "dragstart", OpenLayers.Event.stop);
    },
    
    /**
     * APIMethod: on
     * Convenience method for registering listeners with a common scope.
     *     Internally, this method calls <register> as shown in the examples
     *     below.
     *
     * Example use:
     * (code)
     * // register a single listener for the "loadstart" event
     * events.on({"loadstart": loadStartListener});
     *
     * // this is equivalent to the following
     * events.register("loadstart", undefined, loadStartListener);
     *
     * // register multiple listeners to be called with the same `this` object
     * events.on({
     *     "loadstart": loadStartListener,
     *     "loadend": loadEndListener,
     *     scope: object
     * });
     *
     * // this is equivalent to the following
     * events.register("loadstart", object, loadStartListener);
     * events.register("loadend", object, loadEndListener);
     * (end)
     *
     * Parameters:
     *  object - {Object}     
     */
    on: function(object) {
        for(var type in object) {
            if(type != "scope" && object.hasOwnProperty(type)) {
                this.register(type, object.scope, object[type]);
            }
        }
    },

    /**
     * APIMethod: register
     * Register an event on the events object.
     *
     * When the event is triggered, the 'func' function will be called, in the
     * context of 'obj'. Imagine we were to register an event, specifying an 
     * OpenLayers.Bounds Object as 'obj'. When the event is triggered, the 
     * context in the callback function will be our Bounds object. This means
     * that within our callback function, we can access the properties and 
     * methods of the Bounds object through the "this" variable. So our 
     * callback could execute something like: 
     * :    leftStr = "Left: " + this.left;
     *   
     *                   or
     *  
     * :    centerStr = "Center: " + this.getCenterLonLat();
     *
     * Parameters:
     * type - {String} Name of the event to register
     * obj - {Object} The object to bind the context to for the callback#.
     *     If no object is specified, default is the Events's 'object' property.
     * func - {Function} The callback function. If no callback is 
     *     specified, this function does nothing.
     * priority - {Boolean|Object} If true, adds the new listener to the
     *     *front* of the events queue instead of to the end.
     *
     * Valid options for priority:
     * extension - {Boolean} If true, then the event will be registered as
     *     extension event. Extension events are handled before all other
     *     events.
     */
    register: function (type, obj, func, priority) {
        if (type in OpenLayers.Events && !this.extensions[type]) {
            this.extensions[type] = new OpenLayers.Events[type](this);
        }
        if (func != null) {
            if (obj == null)  {
                obj = this.object;
            }
            var listeners = this.listeners[type];
            if (!listeners) {
                listeners = [];
                this.listeners[type] = listeners;
                this.extensionCount[type] = 0;
            }
            var listener = {obj: obj, func: func};
            if (priority) {
                listeners.splice(this.extensionCount[type], 0, listener);
                if (typeof priority === "object" && priority.extension) {
                    this.extensionCount[type]++;
                }
            } else {
                listeners.push(listener);
            }
        }
    },

    /**
     * APIMethod: registerPriority
     * Same as register() but adds the new listener to the *front* of the
     *     events queue instead of to the end.
     *    
     *     TODO: get rid of this in 3.0 - Decide whether listeners should be 
     *     called in the order they were registered or in reverse order.
     *
     *
     * Parameters:
     * type - {String} Name of the event to register
     * obj - {Object} The object to bind the context to for the callback#.
     *                If no object is specified, default is the Events's 
     *                'object' property.
     * func - {Function} The callback function. If no callback is 
     *                   specified, this function does nothing.
     */
    registerPriority: function (type, obj, func) {
        this.register(type, obj, func, true);
    },
    
    /**
     * APIMethod: un
     * Convenience method for unregistering listeners with a common scope.
     *     Internally, this method calls <unregister> as shown in the examples
     *     below.
     *
     * Example use:
     * (code)
     * // unregister a single listener for the "loadstart" event
     * events.un({"loadstart": loadStartListener});
     *
     * // this is equivalent to the following
     * events.unregister("loadstart", undefined, loadStartListener);
     *
     * // unregister multiple listeners with the same `this` object
     * events.un({
     *     "loadstart": loadStartListener,
     *     "loadend": loadEndListener,
     *     scope: object
     * });
     *
     * // this is equivalent to the following
     * events.unregister("loadstart", object, loadStartListener);
     * events.unregister("loadend", object, loadEndListener);
     * (end)
     */
    un: function(object) {
        for(var type in object) {
            if(type != "scope" && object.hasOwnProperty(type)) {
                this.unregister(type, object.scope, object[type]);
            }
        }
    },

    /**
     * APIMethod: unregister
     *
     * Parameters:
     * type - {String} 
     * obj - {Object} If none specified, defaults to this.object
     * func - {Function} 
     */
    unregister: function (type, obj, func) {
        if (obj == null)  {
            obj = this.object;
        }
        var listeners = this.listeners[type];
        if (listeners != null) {
            for (var i=0, len=listeners.length; i<len; i++) {
                if (listeners[i].obj == obj && listeners[i].func == func) {
                    listeners.splice(i, 1);
                    break;
                }
            }
        }
    },

    /** 
     * Method: remove
     * Remove all listeners for a given event type. If type is not registered,
     *     does nothing.
     *
     * Parameters:
     * type - {String} 
     */
    remove: function(type) {
        if (this.listeners[type] != null) {
            this.listeners[type] = [];
        }
    },

    /**
     * APIMethod: triggerEvent
     * Trigger a specified registered event.  
     * 
     * Parameters:
     * type - {String} 
     * evt - {Event}
     *
     * Returns:
     * {Boolean} The last listener return.  If a listener returns false, the
     *     chain of listeners will stop getting called.
     */
    triggerEvent: function (type, evt) {
        var listeners = this.listeners[type];

        // fast path
        if(!listeners || listeners.length == 0) {
            return undefined;
        }

        // prep evt object with object & div references
        if (evt == null) {
            evt = {};
        }
        evt.object = this.object;
        evt.element = this.element;
        if(!evt.type) {
            evt.type = type;
        }
    
        // execute all callbacks registered for specified type
        // get a clone of the listeners array to
        // allow for splicing during callbacks
        listeners = listeners.slice();
        var continueChain;
        for (var i=0, len=listeners.length; i<len; i++) {
            var callback = listeners[i];
            // bind the context to callback.obj
            continueChain = callback.func.apply(callback.obj, [evt]);

            if ((continueChain != undefined) && (continueChain == false)) {
                // if callback returns false, execute no more callbacks.
                break;
            }
        }
        // don't fall through to other DOM elements
        if (!this.fallThrough) {           
            OpenLayers.Event.stop(evt, true);
        }
        return continueChain;
    },

    /**
     * Method: handleBrowserEvent
     * Basically just a wrapper to the triggerEvent() function, but takes 
     *     care to set a property 'xy' on the event with the current mouse 
     *     position.
     *
     * Parameters:
     * evt - {Event} 
     */
    handleBrowserEvent: function (evt) {
        var type = evt.type, listeners = this.listeners[type];
        if(!listeners || listeners.length == 0) {
            // noone's listening, bail out
            return;
        }
        // add clientX & clientY to all events - corresponds to average x, y
        var touches = evt.touches;
        if (touches && touches[0]) {
            var x = 0;
            var y = 0;
            var num = touches.length;
            var touch;
            for (var i=0; i<num; ++i) {
                touch = touches[i];
                x += touch.clientX;
                y += touch.clientY;
            }
            evt.clientX = x / num;
            evt.clientY = y / num;
        }
        if (this.includeXY) {
            evt.xy = this.getMousePosition(evt);
        } 
        this.triggerEvent(type, evt);
    },

    /**
     * APIMethod: clearMouseCache
     * Clear cached data about the mouse position. This should be called any 
     *     time the element that events are registered on changes position 
     *     within the page.
     */
    clearMouseCache: function() { 
        this.element.scrolls = null;
        this.element.lefttop = null;
        // OpenLayers.Util.pagePosition needs to use
        // element.getBoundingClientRect to correctly calculate the offsets
        // for the iPhone, but once the page is scrolled, getBoundingClientRect
        // returns incorrect offsets. So our best bet is to not invalidate the
        // offsets once we have them, and hope that the page was not scrolled
        // when we did the initial calculation.
        var body = document.body;
        if (body && !((body.scrollTop != 0 || body.scrollLeft != 0) &&
                                    navigator.userAgent.match(/iPhone/i))) {
            this.element.offsets = null;
        }
    },      

    /**
     * Method: getMousePosition
     * 
     * Parameters:
     * evt - {Event} 
     * 
     * Returns:
     * {<OpenLayers.Pixel>} The current xy coordinate of the mouse, adjusted
     *                      for offsets
     */
    getMousePosition: function (evt) {
        if (!this.includeXY) {
            this.clearMouseCache();
        } else if (!this.element.hasScrollEvent) {
            OpenLayers.Event.observe(window, "scroll", this.clearMouseListener);
            this.element.hasScrollEvent = true;
        }
        
        if (!this.element.scrolls) {
            var viewportElement = OpenLayers.Util.getViewportElement();
            this.element.scrolls = [
                viewportElement.scrollLeft,
                viewportElement.scrollTop
            ];
        }

        if (!this.element.lefttop) {
            this.element.lefttop = [
                (document.documentElement.clientLeft || 0),
                (document.documentElement.clientTop  || 0)
            ];
        }
        
        if (!this.element.offsets) {
            this.element.offsets = OpenLayers.Util.pagePosition(this.element);
        }

        return new OpenLayers.Pixel(
            (evt.clientX + this.element.scrolls[0]) - this.element.offsets[0]
                         - this.element.lefttop[0], 
            (evt.clientY + this.element.scrolls[1]) - this.element.offsets[1]
                         - this.element.lefttop[1]
        ); 
    },

    CLASS_NAME: "OpenLayers.Events"
});
/* ======================================================================
    OpenLayers/Events/buttonclick.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Events.js
 */

/**
 * Class: OpenLayers.Events.buttonclick
 * Extension event type for handling buttons on top of a dom element. This
 *     event type fires "buttonclick" on its <target> when a button was
 *     clicked. Buttons are detected by the "olButton" class.
 *
 * This event type makes sure that button clicks do not interfere with other
 *     events that are registered on the same <element>.
 *
 * Event types provided by this extension:
 * - *buttonclick* Triggered when a button is clicked. Listeners receive an
 *     object with a *buttonElement* property referencing the dom element of
 *     the clicked button, and an *buttonXY* property with the click position
 *     relative to the button.
 */
OpenLayers.Events.buttonclick = OpenLayers.Class({
    
    /**
     * Property: target
     * {<OpenLayers.Events>} The events instance that the buttonclick event will
     * be triggered on.
     */
    target: null,
    
    /**
     * Property: events
     * {Array} Events to observe and conditionally stop from propagating when
     *     an element with the olButton class (or its olAlphaImg child) is
     *     clicked.
     */
    events: [
        'mousedown', 'mouseup', 'click', 'dblclick',
        'touchstart', 'touchmove', 'touchend', 'keydown'
    ],
    
    /**
     * Property: startRegEx
     * {RegExp} Regular expression to test Event.type for events that start
     *     a buttonclick sequence.
     */
    startRegEx: /^mousedown|touchstart$/,

    /**
     * Property: cancelRegEx
     * {RegExp} Regular expression to test Event.type for events that cancel
     *     a buttonclick sequence.
     */
    cancelRegEx: /^touchmove$/,

    /**
     * Property: completeRegEx
     * {RegExp} Regular expression to test Event.type for events that complete
     *     a buttonclick sequence.
     */
    completeRegEx: /^mouseup|touchend$/,
    
    /**
     * Property: startEvt
     * {Event} The event that started the click sequence
     */
    
    /**
     * Constructor: OpenLayers.Events.buttonclick
     * Construct a buttonclick event type. Applications are not supposed to
     *     create instances of this class - they are created on demand by
     *     <OpenLayers.Events> instances.
     *
     * Parameters:
     * target - {<OpenLayers.Events>} The events instance that the buttonclick
     *     event will be triggered on.
     */
    initialize: function(target) {
        this.target = target;
        for (var i=this.events.length-1; i>=0; --i) {
            this.target.register(this.events[i], this, this.buttonClick, {
                extension: true
            });
        }
    },
    
    /**
     * Method: destroy
     */
    destroy: function() {
        for (var i=this.events.length-1; i>=0; --i) {
            this.target.unregister(this.events[i], this, this.buttonClick);
        }
        delete this.target;
    },

    /**
     * Method: getPressedButton
     * Get the pressed button, if any. Returns undefined if no button
     * was pressed.
     *
     * Arguments:
     * element - {DOMElement} The event target.
     *
     * Returns:
     * {DOMElement} The button element, or undefined.
     */
    getPressedButton: function(element) {
        var depth = 3, // limit the search depth
            button;
        do {
            if(OpenLayers.Element.hasClass(element, "olButton")) {
                // hit!
                button = element;
                break;
            }
            element = element.parentNode;
        } while(--depth > 0 && element);
        return button;
    },

    /**
     * Method: buttonClick
     * Check if a button was clicked, and fire the buttonclick event
     *
     * Parameters:
     * evt - {Event}
     */
    buttonClick: function(evt) {
        var propagate = true,
            element = OpenLayers.Event.element(evt);
        if (element && (OpenLayers.Event.isLeftClick(evt) || !~evt.type.indexOf("mouse"))) {
            // was a button pressed?
            var button = this.getPressedButton(element);
            if (button) {
                if (evt.type === "keydown") {
                    switch (evt.keyCode) {
                    case OpenLayers.Event.KEY_RETURN:
                    case OpenLayers.Event.KEY_SPACE:
                        this.target.triggerEvent("buttonclick", {
                            buttonElement: button
                        });
                        OpenLayers.Event.stop(evt);
                        propagate = false;
                        break;
                    }
                } else if (this.startEvt) {
                    if (this.completeRegEx.test(evt.type)) {
                        var pos = OpenLayers.Util.pagePosition(button);
                        this.target.triggerEvent("buttonclick", {
                            buttonElement: button,
                            buttonXY: {
                                x: this.startEvt.clientX - pos[0],
                                y: this.startEvt.clientY - pos[1]
                            }
                        });
                    }
                    if (this.cancelRegEx.test(evt.type)) {
                        delete this.startEvt;
                    }
                    OpenLayers.Event.stop(evt);
                    propagate = false;
                }
                if (this.startRegEx.test(evt.type)) {
                    this.startEvt = evt;
                    OpenLayers.Event.stop(evt);
                    propagate = false;
                }
            } else {
                delete this.startEvt;
            }
        }
        return propagate;
    }
    
});
/* ======================================================================
    OpenLayers/Control/OverviewMap.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/** 
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/BaseTypes.js
 * @requires OpenLayers/Events/buttonclick.js
 */

/**
 * Class: OpenLayers.Control.OverviewMap
 * The OverMap control creates a small overview map, useful to display the 
 * extent of a zoomed map and your main map and provide additional 
 * navigation options to the User.  By default the overview map is drawn in
 * the lower right corner of the main map. Create a new overview map with the
 * <OpenLayers.Control.OverviewMap> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.OverviewMap = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: element
     * {DOMElement} The DOM element that contains the overview map
     */
    element: null,
    
    /**
     * APIProperty: ovmap
     * {<OpenLayers.Map>} A reference to the overview map itself.
     */
    ovmap: null,

    /**
     * APIProperty: size
     * {<OpenLayers.Size>} The overvew map size in pixels.  Note that this is
     * the size of the map itself - the element that contains the map (default
     * class name olControlOverviewMapElement) may have padding or other style
     * attributes added via CSS.
     */
    size: {w: 180, h: 90},

    /**
     * APIProperty: layers
     * {Array(<OpenLayers.Layer>)} Ordered list of layers in the overview map.
     * If none are sent at construction, the base layer for the main map is used.
     */
    layers: null,
    
    /**
     * APIProperty: minRectSize
     * {Integer} The minimum width or height (in pixels) of the extent
     *     rectangle on the overview map.  When the extent rectangle reaches
     *     this size, it will be replaced depending on the value of the
     *     <minRectDisplayClass> property.  Default is 15 pixels.
     */
    minRectSize: 15,
    
    /**
     * APIProperty: minRectDisplayClass
     * {String} Replacement style class name for the extent rectangle when
     *     <minRectSize> is reached.  This string will be suffixed on to the
     *     displayClass.  Default is "RectReplacement".
     *
     * Example CSS declaration:
     * (code)
     * .olControlOverviewMapRectReplacement {
     *     overflow: hidden;
     *     cursor: move;
     *     background-image: url("img/overview_replacement.gif");
     *     background-repeat: no-repeat;
     *     background-position: center;
     * }
     * (end)
     */
    minRectDisplayClass: "RectReplacement",

    /**
     * APIProperty: minRatio
     * {Float} The ratio of the overview map resolution to the main map
     *     resolution at which to zoom farther out on the overview map.
     */
    minRatio: 8,

    /**
     * APIProperty: maxRatio
     * {Float} The ratio of the overview map resolution to the main map
     *     resolution at which to zoom farther in on the overview map.
     */
    maxRatio: 32,
    
    /**
     * APIProperty: mapOptions
     * {Object} An object containing any non-default properties to be sent to
     *     the overview map's map constructor.  These should include any
     *     non-default options that the main map was constructed with.
     */
    mapOptions: null,

    /**
     * APIProperty: autoPan
     * {Boolean} Always pan the overview map, so the extent marker remains in
     *     the center.  Default is false.  If true, when you drag the extent
     *     marker, the overview map will update itself so the marker returns
     *     to the center.
     */
    autoPan: false,
    
    /**
     * Property: handlers
     * {Object}
     */
    handlers: null,

    /**
     * Property: resolutionFactor
     * {Object}
     */
    resolutionFactor: 1,

    /**
     * APIProperty: maximized
     * {Boolean} Start as maximized (visible). Defaults to false.
     */
    maximized: false,

    /**
     * Constructor: OpenLayers.Control.OverviewMap
     * Create a new overview map
     *
     * Parameters:
     * options - {Object} Properties of this object will be set on the overview
     * map object.  Note, to set options on the map object contained in this
     * control, set <mapOptions> as one of the options properties.
     */
    initialize: function(options) {
        this.layers = [];
        this.handlers = {};
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * APIMethod: destroy
     * Deconstruct the control
     */
    destroy: function() {
        if (!this.mapDiv) { // we've already been destroyed
            return;
        }
        if (this.handlers.click) {
            this.handlers.click.destroy();
        }
        if (this.handlers.drag) {
            this.handlers.drag.destroy();
        }

        this.ovmap && this.ovmap.viewPortDiv.removeChild(this.extentRectangle);
        this.extentRectangle = null;

        if (this.rectEvents) {
            this.rectEvents.destroy();
            this.rectEvents = null;
        }

        if (this.ovmap) {
            this.ovmap.destroy();
            this.ovmap = null;
        }
        
        this.element.removeChild(this.mapDiv);
        this.mapDiv = null;

        this.div.removeChild(this.element);
        this.element = null;

        if (this.maximizeDiv) {
            this.div.removeChild(this.maximizeDiv);
            this.maximizeDiv = null;
        }
        
        if (this.minimizeDiv) {
            this.div.removeChild(this.minimizeDiv);
            this.minimizeDiv = null;
        }

        this.map.events.un({
            buttonclick: this.onButtonClick,
            moveend: this.update,
            changebaselayer: this.baseLayerDraw,
            scope: this
        });

        OpenLayers.Control.prototype.destroy.apply(this, arguments);    
    },

    /**
     * Method: draw
     * Render the control in the browser.
     */    
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        if (this.layers.length === 0) {
            if (this.map.baseLayer) {
                var layer = this.map.baseLayer.clone();
                this.layers = [layer];
            } else {
                this.map.events.register("changebaselayer", this, this.baseLayerDraw);
                return this.div;
            }
        }

        // create overview map DOM elements
        this.element = document.createElement('div');
        this.element.className = this.displayClass + 'Element';
        this.element.style.display = 'none';

        this.mapDiv = document.createElement('div');
        this.mapDiv.style.width = this.size.w + 'px';
        this.mapDiv.style.height = this.size.h + 'px';
        this.mapDiv.style.position = 'relative';
        this.mapDiv.style.overflow = 'hidden';
        this.mapDiv.id = OpenLayers.Util.createUniqueID('overviewMap');
        
        this.extentRectangle = document.createElement('div');
        this.extentRectangle.style.position = 'absolute';
        this.extentRectangle.style.zIndex = 1000;  //HACK
        this.extentRectangle.className = this.displayClass+'ExtentRectangle';

        this.element.appendChild(this.mapDiv);  

        this.div.appendChild(this.element);

        // Optionally add min/max buttons if the control will go in the
        // map viewport.
        if(!this.outsideViewport) {
            this.div.className += " " + this.displayClass + 'Container';
            // maximize button div
            var img = OpenLayers.Util.getImageLocation('layer-switcher-maximize.png');
            this.maximizeDiv = OpenLayers.Util.createAlphaImageDiv(
                                        this.displayClass + 'MaximizeButton', 
                                        null, 
                                        null, 
                                        img, 
                                        'absolute');
            this.maximizeDiv.style.display = 'none';
            this.maximizeDiv.className = this.displayClass + 'MaximizeButton olButton';
            this.div.appendChild(this.maximizeDiv);
    
            // minimize button div
            var img = OpenLayers.Util.getImageLocation('layer-switcher-minimize.png');
            this.minimizeDiv = OpenLayers.Util.createAlphaImageDiv(
                                        'OpenLayers_Control_minimizeDiv', 
                                        null, 
                                        null, 
                                        img, 
                                        'absolute');
            this.minimizeDiv.style.display = 'none';
            this.minimizeDiv.className = this.displayClass + 'MinimizeButton olButton';
            this.div.appendChild(this.minimizeDiv);            
            this.minimizeControl();
        } else {
            // show the overview map
            this.element.style.display = '';
        }
        if(this.map.getExtent()) {
            this.update();
        }
        
        this.map.events.on({
            buttonclick: this.onButtonClick,
            moveend: this.update,
            scope: this
        });
        
        if (this.maximized) {
            this.maximizeControl();
        }
        return this.div;
    },
    
    /**
     * Method: baseLayerDraw
     * Draw the base layer - called if unable to complete in the initial draw
     */
    baseLayerDraw: function() {
        this.draw();
        this.map.events.unregister("changebaselayer", this, this.baseLayerDraw);
    },

    /**
     * Method: rectDrag
     * Handle extent rectangle drag
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>} The pixel location of the drag.
     */
    rectDrag: function(px) {
        var deltaX = this.handlers.drag.last.x - px.x;
        var deltaY = this.handlers.drag.last.y - px.y;
        if(deltaX != 0 || deltaY != 0) {
            var rectTop = this.rectPxBounds.top;
            var rectLeft = this.rectPxBounds.left;
            var rectHeight = Math.abs(this.rectPxBounds.getHeight());
            var rectWidth = this.rectPxBounds.getWidth();
            // don't allow dragging off of parent element
            var newTop = Math.max(0, (rectTop - deltaY));
            newTop = Math.min(newTop,
                              this.ovmap.size.h - this.hComp - rectHeight);
            var newLeft = Math.max(0, (rectLeft - deltaX));
            newLeft = Math.min(newLeft,
                               this.ovmap.size.w - this.wComp - rectWidth);
            this.setRectPxBounds(new OpenLayers.Bounds(newLeft,
                                                       newTop + rectHeight,
                                                       newLeft + rectWidth,
                                                       newTop));
        }
    },
    
    /**
     * Method: mapDivClick
     * Handle browser events
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} evt
     */
    mapDivClick: function(evt) {
        var pxCenter = this.rectPxBounds.getCenterPixel();
        var deltaX = evt.xy.x - pxCenter.x;
        var deltaY = evt.xy.y - pxCenter.y;
        var top = this.rectPxBounds.top;
        var left = this.rectPxBounds.left;
        var height = Math.abs(this.rectPxBounds.getHeight());
        var width = this.rectPxBounds.getWidth();
        var newTop = Math.max(0, (top + deltaY));
        newTop = Math.min(newTop, this.ovmap.size.h - height);
        var newLeft = Math.max(0, (left + deltaX));
        newLeft = Math.min(newLeft, this.ovmap.size.w - width);
        this.setRectPxBounds(new OpenLayers.Bounds(newLeft,
                                                   newTop + height,
                                                   newLeft + width,
                                                   newTop));
        this.updateMapToRect();
    },
    
    /**
     * Method: onButtonClick
     *
     * Parameters:
     * evt - {Event}
     */
    onButtonClick: function(evt) {
        if (evt.buttonElement === this.minimizeDiv) {
            this.minimizeControl();
        } else if (evt.buttonElement === this.maximizeDiv) {
            this.maximizeControl();
        }
    },

    /**
     * Method: maximizeControl
     * Unhide the control.  Called when the control is in the map viewport.
     *
     * Parameters:
     * e - {<OpenLayers.Event>}
     */
    maximizeControl: function(e) {
        this.element.style.display = '';
        this.showToggle(false);
        if (e != null) {
            OpenLayers.Event.stop(e);                                            
        }
    },

    /**
     * Method: minimizeControl
     * Hide all the contents of the control, shrink the size, 
     * add the maximize icon
     * 
     * Parameters:
     * e - {<OpenLayers.Event>}
     */
    minimizeControl: function(e) {
        this.element.style.display = 'none';
        this.showToggle(true);
        if (e != null) {
            OpenLayers.Event.stop(e);                                            
        }
    },

    /**
     * Method: showToggle
     * Hide/Show the toggle depending on whether the control is minimized
     *
     * Parameters:
     * minimize - {Boolean} 
     */
    showToggle: function(minimize) {
        this.maximizeDiv.style.display = minimize ? '' : 'none';
        this.minimizeDiv.style.display = minimize ? 'none' : '';
    },

    /**
     * Method: update
     * Update the overview map after layers move.
     */
    update: function() {
        if(this.ovmap == null) {
            this.createMap();
        }
        
        if(this.autoPan || !this.isSuitableOverview()) {
            this.updateOverview();
        }
        
        // update extent rectangle
        this.updateRectToMap();
    },
    
    /**
     * Method: isSuitableOverview
     * Determines if the overview map is suitable given the extent and
     * resolution of the main map.
     */
    isSuitableOverview: function() {
        var mapExtent = this.map.getExtent();
        var maxExtent = this.map.maxExtent;
        var testExtent = new OpenLayers.Bounds(
                                Math.max(mapExtent.left, maxExtent.left),
                                Math.max(mapExtent.bottom, maxExtent.bottom),
                                Math.min(mapExtent.right, maxExtent.right),
                                Math.min(mapExtent.top, maxExtent.top));        

        if (this.ovmap.getProjection() != this.map.getProjection()) {
            testExtent = testExtent.transform(
                this.map.getProjectionObject(),
                this.ovmap.getProjectionObject() );
        }

        var resRatio = this.ovmap.getResolution() / this.map.getResolution();
        return ((resRatio > this.minRatio) &&
                (resRatio <= this.maxRatio) &&
                (this.ovmap.getExtent().containsBounds(testExtent)));
    },
    
    /**
     * Method updateOverview
     * Called by <update> if <isSuitableOverview> returns true
     */
    updateOverview: function() {
        var mapRes = this.map.getResolution();
        var targetRes = this.ovmap.getResolution();
        var resRatio = targetRes / mapRes;
        if(resRatio > this.maxRatio) {
            // zoom in overview map
            targetRes = this.minRatio * mapRes;            
        } else if(resRatio <= this.minRatio) {
            // zoom out overview map
            targetRes = this.maxRatio * mapRes;
        }
        var center;
        if (this.ovmap.getProjection() != this.map.getProjection()) {
            center = this.map.center.clone();
            center.transform(this.map.getProjectionObject(),
                this.ovmap.getProjectionObject() );
        } else {
            center = this.map.center;
        }
        this.ovmap.setCenter(center, this.ovmap.getZoomForResolution(
            targetRes * this.resolutionFactor));
        this.updateRectToMap();
    },
    
    /**
     * Method: createMap
     * Construct the map that this control contains
     */
    createMap: function() {
        // create the overview map
        var options = OpenLayers.Util.extend(
                        {controls: [], maxResolution: 'auto', 
                         fallThrough: false}, this.mapOptions);
        this.ovmap = new OpenLayers.Map(this.mapDiv, options);
        this.ovmap.viewPortDiv.appendChild(this.extentRectangle);
        
        // prevent ovmap from being destroyed when the page unloads, because
        // the OverviewMap control has to do this (and does it).
        OpenLayers.Event.stopObserving(window, 'unload', this.ovmap.unloadDestroy);
        
        this.ovmap.addLayers(this.layers);
        this.ovmap.zoomToMaxExtent();
        // check extent rectangle border width
        this.wComp = parseInt(OpenLayers.Element.getStyle(this.extentRectangle,
                                               'border-left-width')) +
                     parseInt(OpenLayers.Element.getStyle(this.extentRectangle,
                                               'border-right-width'));
        this.wComp = (this.wComp) ? this.wComp : 2;
        this.hComp = parseInt(OpenLayers.Element.getStyle(this.extentRectangle,
                                               'border-top-width')) +
                     parseInt(OpenLayers.Element.getStyle(this.extentRectangle,
                                               'border-bottom-width'));
        this.hComp = (this.hComp) ? this.hComp : 2;

        this.handlers.drag = new OpenLayers.Handler.Drag(
            this, {move: this.rectDrag, done: this.updateMapToRect},
            {map: this.ovmap}
        );
        this.handlers.click = new OpenLayers.Handler.Click(
            this, {
                "click": this.mapDivClick
            },{
                "single": true, "double": false,
                "stopSingle": true, "stopDouble": true,
                "pixelTolerance": 1,
                map: this.ovmap
            }
        );
        this.handlers.click.activate();
        
        this.rectEvents = new OpenLayers.Events(this, this.extentRectangle,
                                                null, true);
        this.rectEvents.register("mouseover", this, function(e) {
            if(!this.handlers.drag.active && !this.map.dragging) {
                this.handlers.drag.activate();
            }
        });
        this.rectEvents.register("mouseout", this, function(e) {
            if(!this.handlers.drag.dragging) {
                this.handlers.drag.deactivate();
            }
        });

        if (this.ovmap.getProjection() != this.map.getProjection()) {
            var sourceUnits = this.map.getProjectionObject().getUnits() ||
                this.map.units || this.map.baseLayer.units;
            var targetUnits = this.ovmap.getProjectionObject().getUnits() ||
                this.ovmap.units || this.ovmap.baseLayer.units;
            this.resolutionFactor = sourceUnits && targetUnits ?
                OpenLayers.INCHES_PER_UNIT[sourceUnits] /
                OpenLayers.INCHES_PER_UNIT[targetUnits] : 1;
        }
    },
        
    /**
     * Method: updateRectToMap
     * Updates the extent rectangle position and size to match the map extent
     */
    updateRectToMap: function() {
        // If the projections differ we need to reproject
        var bounds;
        if (this.ovmap.getProjection() != this.map.getProjection()) {
            bounds = this.map.getExtent().transform(
                this.map.getProjectionObject(), 
                this.ovmap.getProjectionObject() );
        } else {
            bounds = this.map.getExtent();
        }
        var pxBounds = this.getRectBoundsFromMapBounds(bounds);
        if (pxBounds) {
            this.setRectPxBounds(pxBounds);
        }
    },
    
    /**
     * Method: updateMapToRect
     * Updates the map extent to match the extent rectangle position and size
     */
    updateMapToRect: function() {
        var lonLatBounds = this.getMapBoundsFromRectBounds(this.rectPxBounds);
        if (this.ovmap.getProjection() != this.map.getProjection()) {
            lonLatBounds = lonLatBounds.transform(
                this.ovmap.getProjectionObject(),
                this.map.getProjectionObject() );
        }
        this.map.panTo(lonLatBounds.getCenterLonLat());
    },

    /**
     * Method: setRectPxBounds
     * Set extent rectangle pixel bounds.
     *
     * Parameters:
     * pxBounds - {<OpenLayers.Bounds>}
     */
    setRectPxBounds: function(pxBounds) {
        var top = Math.max(pxBounds.top, 0);
        var left = Math.max(pxBounds.left, 0);
        var bottom = Math.min(pxBounds.top + Math.abs(pxBounds.getHeight()),
                              this.ovmap.size.h - this.hComp);
        var right = Math.min(pxBounds.left + pxBounds.getWidth(),
                             this.ovmap.size.w - this.wComp);
        var width = Math.max(right - left, 0);
        var height = Math.max(bottom - top, 0);
        if(width < this.minRectSize || height < this.minRectSize) {
            this.extentRectangle.className = this.displayClass +
                                             this.minRectDisplayClass;
            var rLeft = left + (width / 2) - (this.minRectSize / 2);
            var rTop = top + (height / 2) - (this.minRectSize / 2);
            this.extentRectangle.style.top = Math.round(rTop) + 'px';
            this.extentRectangle.style.left = Math.round(rLeft) + 'px';
            this.extentRectangle.style.height = this.minRectSize + 'px';
            this.extentRectangle.style.width = this.minRectSize + 'px';
        } else {
            this.extentRectangle.className = this.displayClass +
                                             'ExtentRectangle';
            this.extentRectangle.style.top = Math.round(top) + 'px';
            this.extentRectangle.style.left = Math.round(left) + 'px';
            this.extentRectangle.style.height = Math.round(height) + 'px';
            this.extentRectangle.style.width = Math.round(width) + 'px';
        }
        this.rectPxBounds = new OpenLayers.Bounds(
            Math.round(left), Math.round(bottom),
            Math.round(right), Math.round(top)
        );
    },

    /**
     * Method: getRectBoundsFromMapBounds
     * Get the rect bounds from the map bounds.
     *
     * Parameters:
     * lonLatBounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {<OpenLayers.Bounds>}A bounds which is the passed-in map lon/lat extent
     * translated into pixel bounds for the overview map
     */
    getRectBoundsFromMapBounds: function(lonLatBounds) {
        var leftBottomPx = this.getOverviewPxFromLonLat({
            lon: lonLatBounds.left,
            lat: lonLatBounds.bottom
        });
        var rightTopPx = this.getOverviewPxFromLonLat({
            lon: lonLatBounds.right,
            lat: lonLatBounds.top
        });
        var bounds = null;
        if (leftBottomPx && rightTopPx) {
            bounds = new OpenLayers.Bounds(leftBottomPx.x, leftBottomPx.y,
                                           rightTopPx.x, rightTopPx.y);
        }
        return bounds;
    },

    /**
     * Method: getMapBoundsFromRectBounds
     * Get the map bounds from the rect bounds.
     *
     * Parameters:
     * pxBounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {<OpenLayers.Bounds>} Bounds which is the passed-in overview rect bounds
     * translated into lon/lat bounds for the overview map
     */
    getMapBoundsFromRectBounds: function(pxBounds) {
        var leftBottomLonLat = this.getLonLatFromOverviewPx({
            x: pxBounds.left,
            y: pxBounds.bottom
        });
        var rightTopLonLat = this.getLonLatFromOverviewPx({
            x: pxBounds.right,
            y: pxBounds.top
        });
        return new OpenLayers.Bounds(leftBottomLonLat.lon, leftBottomLonLat.lat,
                                     rightTopLonLat.lon, rightTopLonLat.lat);
    },

    /**
     * Method: getLonLatFromOverviewPx
     * Get a map location from a pixel location
     *
     * Parameters:
     * overviewMapPx - {<OpenLayers.Pixel>|Object} OpenLayers.Pixel or
     *                                             an object with a
     *                                             'x' and 'y' properties.
     *
     * Returns:
     * {Object} Location which is the passed-in overview map
     * OpenLayers.Pixel, translated into lon/lat by the overview
     * map. An object with a 'lon' and 'lat' properties.
     */
    getLonLatFromOverviewPx: function(overviewMapPx) {
        var size = this.ovmap.size;
        var res  = this.ovmap.getResolution();
        var center = this.ovmap.getExtent().getCenterLonLat();
    
        var deltaX = overviewMapPx.x - (size.w / 2);
        var deltaY = overviewMapPx.y - (size.h / 2);

        return {
            lon: center.lon + deltaX * res,
            lat: center.lat - deltaY * res
        };
    },

    /**
     * Method: getOverviewPxFromLonLat
     * Get a pixel location from a map location
     *
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
     *     object with a 'lon' and 'lat' properties.
     *
     * Returns:
     * {Object} Location which is the passed-in OpenLayers.LonLat, 
     * translated into overview map pixels
     */
    getOverviewPxFromLonLat: function(lonlat) {
        var res = this.ovmap.getResolution();
        var extent = this.ovmap.getExtent();
        if (extent) {
            return {
                x: Math.round(1/res * (lonlat.lon - extent.left)),
                y: Math.round(1/res * (extent.top - lonlat.lat))
            };
        } 
    },

    CLASS_NAME: 'OpenLayers.Control.OverviewMap'
});
/* ======================================================================
    OpenLayers/Animation.js
   ====================================================================== */

/**
 * Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. 
 *
 * @requires OpenLayers/SingleFile.js
 */

/**
 * Namespace: OpenLayers.Animation
 * A collection of utility functions for executing methods that repaint a 
 *     portion of the browser window.  These methods take advantage of the
 *     browser's scheduled repaints where requestAnimationFrame is available.
 */
OpenLayers.Animation = (function(window) {
    
    /**
     * Property: isNative
     * {Boolean} true if a native requestAnimationFrame function is available
     */
    var isNative = !!(window.requestAnimationFrame ||
        window.webkitRequestAnimationFrame ||
        window.mozRequestAnimationFrame ||
        window.oRequestAnimationFrame ||
        window.msRequestAnimationFrame);
    
    /**
     * Function: requestFrame
     * Schedule a function to be called at the next available animation frame.
     *     Uses the native method where available.  Where requestAnimationFrame is
     *     not available, setTimeout will be called with a 16ms delay.
     *
     * Parameters:
     * callback - {Function} The function to be called at the next animation frame.
     * element - {DOMElement} Optional element that visually bounds the animation.
     */
    var requestFrame = (function() {
        var request = window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function(callback, element) {
                window.setTimeout(callback, 16);
            };
        // bind to window to avoid illegal invocation of native function
        return function(callback, element) {
            request.apply(window, [callback, element]);
        };
    })();
    
    // private variables for animation loops
    var counter = 0;
    var loops = {};
    
    /**
     * Function: start
     * Executes a method with <requestFrame> in series for some 
     *     duration.
     *
     * Parameters:
     * callback - {Function} The function to be called at the next animation frame.
     * duration - {Number} Optional duration for the loop.  If not provided, the
     *     animation loop will execute indefinitely.
     * element - {DOMElement} Optional element that visually bounds the animation.
     *
     * Returns:
     * {Number} Identifier for the animation loop.  Used to stop animations with
     *     <stop>.
     */
    function start(callback, duration, element) {
        duration = duration > 0 ? duration : Number.POSITIVE_INFINITY;
        var id = ++counter;
        var start = +new Date;
        loops[id] = function() {
            if (loops[id] && +new Date - start <= duration) {
                callback();
                if (loops[id]) {
                    requestFrame(loops[id], element);
                }
            } else {
                delete loops[id];
            }
        };
        requestFrame(loops[id], element);
        return id;
    }
    
    /**
     * Function: stop
     * Terminates an animation loop started with <start>.
     *
     * Parameters:
     * id - {Number} Identifier returned from <start>.
     */
    function stop(id) {
        delete loops[id];
    }
    
    return {
        isNative: isNative,
        requestFrame: requestFrame,
        start: start,
        stop: stop
    };
    
})(window);
/* ======================================================================
    OpenLayers/Tween.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Animation.js
 */

/**
 * Namespace: OpenLayers.Tween
 */
OpenLayers.Tween = OpenLayers.Class({
    
    /**
     * APIProperty: easing
     * {<OpenLayers.Easing>(Function)} Easing equation used for the animation
     *     Defaultly set to OpenLayers.Easing.Expo.easeOut
     */
    easing: null,
    
    /**
     * APIProperty: begin
     * {Object} Values to start the animation with
     */
    begin: null,
    
    /**
     * APIProperty: finish
     * {Object} Values to finish the animation with
     */
    finish: null,
    
    /**
     * APIProperty: duration
     * {int} duration of the tween (number of steps)
     */
    duration: null,
    
    /**
     * APIProperty: callbacks
     * {Object} An object with start, eachStep and done properties whose values
     *     are functions to be call during the animation. They are passed the
     *     current computed value as argument.
     */
    callbacks: null,
    
    /**
     * Property: time
     * {int} Step counter
     */
    time: null,
    
    /**
     * Property: animationId
     * {int} Loop id returned by OpenLayers.Animation.start
     */
    animationId: null,
    
    /**
     * Property: playing
     * {Boolean} Tells if the easing is currently playing
     */
    playing: false,
    
    /** 
     * Constructor: OpenLayers.Tween
     * Creates a Tween.
     *
     * Parameters:
     * easing - {<OpenLayers.Easing>(Function)} easing function method to use
     */ 
    initialize: function(easing) {
        this.easing = (easing) ? easing : OpenLayers.Easing.Expo.easeOut;
    },
    
    /**
     * APIMethod: start
     * Plays the Tween, and calls the callback method on each step
     * 
     * Parameters:
     * begin - {Object} values to start the animation with
     * finish - {Object} values to finish the animation with
     * duration - {int} duration of the tween (number of steps)
     * options - {Object} hash of options (for example callbacks (start, eachStep, done))
     */
    start: function(begin, finish, duration, options) {
        this.playing = true;
        this.begin = begin;
        this.finish = finish;
        this.duration = duration;
        this.callbacks = options.callbacks;
        this.time = 0;
        OpenLayers.Animation.stop(this.animationId);
        this.animationId = null;
        if (this.callbacks && this.callbacks.start) {
            this.callbacks.start.call(this, this.begin);
        }
        this.animationId = OpenLayers.Animation.start(
            OpenLayers.Function.bind(this.play, this)
        );
    },
    
    /**
     * APIMethod: stop
     * Stops the Tween, and calls the done callback
     *     Doesn't do anything if animation is already finished
     */
    stop: function() {
        if (!this.playing) {
            return;
        }
        
        if (this.callbacks && this.callbacks.done) {
            this.callbacks.done.call(this, this.finish);
        }
        OpenLayers.Animation.stop(this.animationId);
        this.animationId = null;
        this.playing = false;
    },
    
    /**
     * Method: play
     * Calls the appropriate easing method
     */
    play: function() {
        var value = {};
        for (var i in this.begin) {
            var b = this.begin[i];
            var f = this.finish[i];
            if (b == null || f == null || isNaN(b) || isNaN(f)) {
                throw new TypeError('invalid value for Tween');
            }

            var c = f - b;
            value[i] = this.easing.apply(this, [this.time, b, c, this.duration]);
        }
        this.time++;
        
        if (this.callbacks && this.callbacks.eachStep) {
            this.callbacks.eachStep.call(this, value);
        }
        
        if (this.time > this.duration) {
            this.stop();
        }
    },
    
    /**
     * Create empty functions for all easing methods.
     */
    CLASS_NAME: "OpenLayers.Tween"
});

/**
 * Namespace: OpenLayers.Easing
 * 
 * Credits:
 *      Easing Equations by Robert Penner, <http://www.robertpenner.com/easing/>
 */
OpenLayers.Easing = {
    /**
     * Create empty functions for all easing methods.
     */
    CLASS_NAME: "OpenLayers.Easing"
};

/**
 * Namespace: OpenLayers.Easing.Linear
 */
OpenLayers.Easing.Linear = {
    
    /**
     * Function: easeIn
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeIn: function(t, b, c, d) {
        return c*t/d + b;
    },
    
    /**
     * Function: easeOut
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeOut: function(t, b, c, d) {
        return c*t/d + b;
    },
    
    /**
     * Function: easeInOut
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeInOut: function(t, b, c, d) {
        return c*t/d + b;
    },

    CLASS_NAME: "OpenLayers.Easing.Linear"
};

/**
 * Namespace: OpenLayers.Easing.Expo
 */
OpenLayers.Easing.Expo = {
    
    /**
     * Function: easeIn
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeIn: function(t, b, c, d) {
        return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
    },
    
    /**
     * Function: easeOut
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeOut: function(t, b, c, d) {
        return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
    },
    
    /**
     * Function: easeInOut
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeInOut: function(t, b, c, d) {
        if (t==0) return b;
        if (t==d) return b+c;
        if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
        return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
    },

    CLASS_NAME: "OpenLayers.Easing.Expo"
};

/**
 * Namespace: OpenLayers.Easing.Quad
 */
OpenLayers.Easing.Quad = {
    
    /**
     * Function: easeIn
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeIn: function(t, b, c, d) {
        return c*(t/=d)*t + b;
    },
    
    /**
     * Function: easeOut
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeOut: function(t, b, c, d) {
        return -c *(t/=d)*(t-2) + b;
    },
    
    /**
     * Function: easeInOut
     * 
     * Parameters:
     * t - {Float} time
     * b - {Float} beginning position
     * c - {Float} total change
     * d - {Float} duration of the transition
     *
     * Returns:
     * {Float}
     */
    easeInOut: function(t, b, c, d) {
        if ((t/=d/2) < 1) return c/2*t*t + b;
        return -c/2 * ((--t)*(t-2) - 1) + b;
    },

    CLASS_NAME: "OpenLayers.Easing.Quad"
};
/* ======================================================================
    OpenLayers/Projection.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 */

/**
 * Namespace: OpenLayers.Projection
 * Methods for coordinate transforms between coordinate systems.  By default,
 *     OpenLayers ships with the ability to transform coordinates between
 *     geographic (EPSG:4326) and web or spherical mercator (EPSG:900913 et al.)
 *     coordinate reference systems.  See the <transform> method for details
 *     on usage.
 *
 * Additional transforms may be added by using the <proj4js at http://proj4js.org/>
 *     library.  If the proj4js library is included, the <transform> method 
 *     will work between any two coordinate reference systems with proj4js 
 *     definitions.
 *
 * If the proj4js library is not included, or if you wish to allow transforms
 *     between arbitrary coordinate reference systems, use the <addTransform>
 *     method to register a custom transform method.
 */
OpenLayers.Projection = OpenLayers.Class({

    /**
     * Property: proj
     * {Object} Proj4js.Proj instance.
     */
    proj: null,
    
    /**
     * Property: projCode
     * {String}
     */
    projCode: null,
    
    /**
     * Property: titleRegEx
     * {RegExp} regular expression to strip the title from a proj4js definition
     */
    titleRegEx: /\+title=[^\+]*/,

    /**
     * Constructor: OpenLayers.Projection
     * This class offers several methods for interacting with a wrapped 
     *     pro4js projection object. 
     *
     * Parameters:
     * projCode - {String} A string identifying the Well Known Identifier for
     *    the projection.
     * options - {Object} An optional object to set additional properties
     *     on the projection.
     *
     * Returns:
     * {<OpenLayers.Projection>} A projection object.
     */
    initialize: function(projCode, options) {
        OpenLayers.Util.extend(this, options);
        this.projCode = projCode;
        if (window.Proj4js) {
            this.proj = new Proj4js.Proj(projCode);
        }
    },
    
    /**
     * APIMethod: getCode
     * Get the string SRS code.
     *
     * Returns:
     * {String} The SRS code.
     */
    getCode: function() {
        return this.proj ? this.proj.srsCode : this.projCode;
    },
   
    /**
     * APIMethod: getUnits
     * Get the units string for the projection -- returns null if 
     *     proj4js is not available.
     *
     * Returns:
     * {String} The units abbreviation.
     */
    getUnits: function() {
        return this.proj ? this.proj.units : null;
    },

    /**
     * Method: toString
     * Convert projection to string (getCode wrapper).
     *
     * Returns:
     * {String} The projection code.
     */
    toString: function() {
        return this.getCode();
    },

    /**
     * Method: equals
     * Test equality of two projection instances.  Determines equality based
     *     soley on the projection code.
     *
     * Returns:
     * {Boolean} The two projections are equivalent.
     */
    equals: function(projection) {
        var p = projection, equals = false;
        if (p) {
            if (!(p instanceof OpenLayers.Projection)) {
                p = new OpenLayers.Projection(p);
            }
            if (window.Proj4js && this.proj.defData && p.proj.defData) {
                equals = this.proj.defData.replace(this.titleRegEx, "") ==
                    p.proj.defData.replace(this.titleRegEx, "");
            } else if (p.getCode) {
                var source = this.getCode(), target = p.getCode();
                equals = source == target ||
                    !!OpenLayers.Projection.transforms[source] &&
                    OpenLayers.Projection.transforms[source][target] ===
                        OpenLayers.Projection.nullTransform;
            }
        }
        return equals;   
    },

    /* Method: destroy
     * Destroy projection object.
     */
    destroy: function() {
        delete this.proj;
        delete this.projCode;
    },
    
    CLASS_NAME: "OpenLayers.Projection" 
});     

/**
 * Property: transforms
 * {Object} Transforms is an object, with from properties, each of which may
 * have a to property. This allows you to define projections without 
 * requiring support for proj4js to be included.
 *
 * This object has keys which correspond to a 'source' projection object.  The
 * keys should be strings, corresponding to the projection.getCode() value.
 * Each source projection object should have a set of destination projection
 * keys included in the object. 
 * 
 * Each value in the destination object should be a transformation function,
 * where the function is expected to be passed an object with a .x and a .y
 * property.  The function should return the object, with the .x and .y
 * transformed according to the transformation function.
 *
 * Note - Properties on this object should not be set directly.  To add a
 *     transform method to this object, use the <addTransform> method.  For an
 *     example of usage, see the OpenLayers.Layer.SphericalMercator file.
 */
OpenLayers.Projection.transforms = {};

/**
 * APIProperty: defaults
 * {Object} Defaults for the SRS codes known to OpenLayers (currently
 * EPSG:4326, CRS:84, urn:ogc:def:crs:EPSG:6.6:4326, EPSG:900913, EPSG:3857,
 * EPSG:102113 and EPSG:102100). Keys are the SRS code, values are units,
 * maxExtent (the validity extent for the SRS) and yx (true if this SRS is
 * known to have a reverse axis order).
 */
OpenLayers.Projection.defaults = {
    "EPSG:4326": {
        units: "degrees",
        maxExtent: [-180, -90, 180, 90],
        yx: true
    },
    "CRS:84": {
        units: "degrees",
        maxExtent: [-180, -90, 180, 90]
    },
    "EPSG:900913": {
        units: "m",
        maxExtent: [-20037508.34, -20037508.34, 20037508.34, 20037508.34]
    }
};

/**
 * APIMethod: addTransform
 * Set a custom transform method between two projections.  Use this method in
 *     cases where the proj4js lib is not available or where custom projections
 *     need to be handled.
 *
 * Parameters:
 * from - {String} The code for the source projection
 * to - {String} the code for the destination projection
 * method - {Function} A function that takes a point as an argument and
 *     transforms that point from the source to the destination projection
 *     in place.  The original point should be modified.
 */
OpenLayers.Projection.addTransform = function(from, to, method) {
    if (method === OpenLayers.Projection.nullTransform) {
        var defaults = OpenLayers.Projection.defaults[from];
        if (defaults && !OpenLayers.Projection.defaults[to]) {
            OpenLayers.Projection.defaults[to] = defaults;
        }
    }
    if(!OpenLayers.Projection.transforms[from]) {
        OpenLayers.Projection.transforms[from] = {};
    }
    OpenLayers.Projection.transforms[from][to] = method;
};

/**
 * APIMethod: transform
 * Transform a point coordinate from one projection to another.  Note that
 *     the input point is transformed in place.
 * 
 * Parameters:
 * point - {<OpenLayers.Geometry.Point> | Object} An object with x and y
 *     properties representing coordinates in those dimensions.
 * source - {OpenLayers.Projection} Source map coordinate system
 * dest - {OpenLayers.Projection} Destination map coordinate system
 *
 * Returns:
 * point - {object} A transformed coordinate.  The original point is modified.
 */
OpenLayers.Projection.transform = function(point, source, dest) {
    if (source && dest) {
        if (!(source instanceof OpenLayers.Projection)) {
            source = new OpenLayers.Projection(source);
        }
        if (!(dest instanceof OpenLayers.Projection)) {
            dest = new OpenLayers.Projection(dest);
        }
        if (source.proj && dest.proj) {
            point = Proj4js.transform(source.proj, dest.proj, point);
        } else {
            var sourceCode = source.getCode();
            var destCode = dest.getCode();
            var transforms = OpenLayers.Projection.transforms;
            if (transforms[sourceCode] && transforms[sourceCode][destCode]) {
                transforms[sourceCode][destCode](point);
            }
        }
    }
    return point;
};

/**
 * APIFunction: nullTransform
 * A null transformation - useful for defining projection aliases when
 * proj4js is not available:
 *
 * (code)
 * OpenLayers.Projection.addTransform("EPSG:3857", "EPSG:900913",
 *     OpenLayers.Projection.nullTransform);
 * OpenLayers.Projection.addTransform("EPSG:900913", "EPSG:3857",
 *     OpenLayers.Projection.nullTransform);
 * (end)
 */
OpenLayers.Projection.nullTransform = function(point) {
    return point;
};

/**
 * Note: Transforms for web mercator <-> geographic
 * OpenLayers recognizes EPSG:3857, EPSG:900913, EPSG:102113 and EPSG:102100.
 * OpenLayers originally started referring to EPSG:900913 as web mercator.
 * The EPSG has declared EPSG:3857 to be web mercator.
 * ArcGIS 10 recognizes the EPSG:3857, EPSG:102113, and EPSG:102100 as
 * equivalent.  See http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/11/20/ArcGIS-Online-moving-to-Google-_2F00_-Bing-tiling-scheme_3A00_-What-does-this-mean-for-you_3F00_.aspx#12084.
 * For geographic, OpenLayers recognizes EPSG:4326, CRS:84 and
 * urn:ogc:def:crs:EPSG:6.6:4326. OpenLayers also knows about the reverse axis
 * order for EPSG:4326. 
 */
(function() {

    var pole = 20037508.34;

    function inverseMercator(xy) {
        xy.x = 180 * xy.x / pole;
        xy.y = 180 / Math.PI * (2 * Math.atan(Math.exp((xy.y / pole) * Math.PI)) - Math.PI / 2);
        return xy;
    }

    function forwardMercator(xy) {
        xy.x = xy.x * pole / 180;
        xy.y = Math.log(Math.tan((90 + xy.y) * Math.PI / 360)) / Math.PI * pole;
        return xy;
    }

    function map(base, codes) {
        var add = OpenLayers.Projection.addTransform;
        var same = OpenLayers.Projection.nullTransform;
        var i, len, code, other, j;
        for (i=0, len=codes.length; i<len; ++i) {
            code = codes[i];
            add(base, code, forwardMercator);
            add(code, base, inverseMercator);
            for (j=i+1; j<len; ++j) {
                other = codes[j];
                add(code, other, same);
                add(other, code, same);
            }
        }
    }
    
    // list of equivalent codes for web mercator
    var mercator = ["EPSG:900913", "EPSG:3857", "EPSG:102113", "EPSG:102100"],
        geographic = ["CRS:84", "urn:ogc:def:crs:EPSG:6.6:4326", "EPSG:4326"],
        i;
    for (i=mercator.length-1; i>=0; --i) {
        map(mercator[i], geographic);
    }
    for (i=geographic.length-1; i>=0; --i) {
        map(geographic[i], mercator);
    }

})();
/* ======================================================================
    OpenLayers/Map.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 * @requires OpenLayers/Events.js
 * @requires OpenLayers/Tween.js
 * @requires OpenLayers/Projection.js
 */

/**
 * Class: OpenLayers.Map
 * Instances of OpenLayers.Map are interactive maps embedded in a web page.
 * Create a new map with the <OpenLayers.Map> constructor.
 * 
 * On their own maps do not provide much functionality.  To extend a map
 * it's necessary to add controls (<OpenLayers.Control>) and 
 * layers (<OpenLayers.Layer>) to the map. 
 */
OpenLayers.Map = OpenLayers.Class({
    
    /**
     * Constant: Z_INDEX_BASE
     * {Object} Base z-indexes for different classes of thing 
     */
    Z_INDEX_BASE: {
        BaseLayer: 100,
        Overlay: 325,
        Feature: 725,
        Popup: 750,
        Control: 1000
    },

    /**
     * APIProperty: events
     * {<OpenLayers.Events>}
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * map.events.register(type, obj, listener);
     * (end)
     *
     * Listeners will be called with a reference to an event object.  The
     *     properties of this event depends on exactly what happened.
     *
     * All event objects have at least the following properties:
     * object - {Object} A reference to map.events.object.
     * element - {DOMElement} A reference to map.events.element.
     *
     * Browser events have the following additional properties:
     * xy - {<OpenLayers.Pixel>} The pixel location of the event (relative
     *     to the the map viewport).
     *
     * Supported map event types:
     * preaddlayer - triggered before a layer has been added.  The event
     *     object will include a *layer* property that references the layer  
     *     to be added. When a listener returns "false" the adding will be 
     *     aborted.
     * addlayer - triggered after a layer has been added.  The event object
     *     will include a *layer* property that references the added layer.
     * preremovelayer - triggered before a layer has been removed. The event
     *     object will include a *layer* property that references the layer  
     *     to be removed. When a listener returns "false" the removal will be 
     *     aborted.
     * removelayer - triggered after a layer has been removed.  The event
     *     object will include a *layer* property that references the removed
     *     layer.
     * changelayer - triggered after a layer name change, order change,
     *     opacity change, params change, visibility change (due to resolution
     *     thresholds) or attribution change (due to extent change). Listeners
     *     will receive an event object with *layer* and *property* properties.
     *     The *layer* property will be a reference to the changed layer. The
     *     *property* property will be a key to the changed property (name,
     *     order, opacity, params, visibility or attribution).
     * movestart - triggered after the start of a drag, pan, or zoom
     * move - triggered after each drag, pan, or zoom
     * moveend - triggered after a drag, pan, or zoom completes
     * zoomend - triggered after a zoom completes
     * mouseover - triggered after mouseover the map
     * mouseout - triggered after mouseout the map
     * mousemove - triggered after mousemove the map
     * changebaselayer - triggered after the base layer changes
     */

    /**
     * Property: id
     * {String} Unique identifier for the map
     */
    id: null,
    
    /**
     * Property: fractionalZoom
     * {Boolean} For a base layer that supports it, allow the map resolution
     *     to be set to a value between one of the values in the resolutions
     *     array.  Default is false.
     *
     * When fractionalZoom is set to true, it is possible to zoom to
     *     an arbitrary extent.  This requires a base layer from a source
     *     that supports requests for arbitrary extents (i.e. not cached
     *     tiles on a regular lattice).  This means that fractionalZoom
     *     will not work with commercial layers (Google, Yahoo, VE), layers
     *     using TileCache, or any other pre-cached data sources.
     *
     * If you are using fractionalZoom, then you should also use
     *     <getResolutionForZoom> instead of layer.resolutions[zoom] as the
     *     former works for non-integer zoom levels.
     */
    fractionalZoom: false,
    
    /**
     * APIProperty: events
     * {<OpenLayers.Events>} An events object that handles all 
     *                       events on the map
     */
    events: null,
    
    /**
     * APIProperty: allOverlays
     * {Boolean} Allow the map to function with "overlays" only.  Defaults to
     *     false.  If true, the lowest layer in the draw order will act as
     *     the base layer.  In addition, if set to true, all layers will
     *     have isBaseLayer set to false when they are added to the map.
     *
     * Note:
     * If you set map.allOverlays to true, then you *cannot* use
     *     map.setBaseLayer or layer.setIsBaseLayer.  With allOverlays true,
     *     the lowest layer in the draw layer is the base layer.  So, to change
     *     the base layer, use <setLayerIndex> or <raiseLayer> to set the layer
     *     index to 0.
     */
    allOverlays: false,

    /**
     * APIProperty: div
     * {DOMElement|String} The element that contains the map (or an id for
     *     that element).  If the <OpenLayers.Map> constructor is called
     *     with two arguments, this should be provided as the first argument.
     *     Alternatively, the map constructor can be called with the options
     *     object as the only argument.  In this case (one argument), a
     *     div property may or may not be provided.  If the div property
     *     is not provided, the map can be rendered to a container later
     *     using the <render> method.
     *     
     * Note:
     * If you are calling <render> after map construction, do not use
     *     <maxResolution>  auto.  Instead, divide your <maxExtent> by your
     *     maximum expected dimension.
     */
    div: null,
    
    /**
     * Property: dragging
     * {Boolean} The map is currently being dragged.
     */
    dragging: false,

    /**
     * Property: size
     * {<OpenLayers.Size>} Size of the main div (this.div)
     */
    size: null,
    
    /**
     * Property: viewPortDiv
     * {HTMLDivElement} The element that represents the map viewport
     */
    viewPortDiv: null,

    /**
     * Property: layerContainerOrigin
     * {<OpenLayers.LonLat>} The lonlat at which the later container was
     *                       re-initialized (on-zoom)
     */
    layerContainerOrigin: null,

    /**
     * Property: layerContainerDiv
     * {HTMLDivElement} The element that contains the layers.
     */
    layerContainerDiv: null,

    /**
     * APIProperty: layers
     * {Array(<OpenLayers.Layer>)} Ordered list of layers in the map
     */
    layers: null,

    /**
     * APIProperty: controls
     * {Array(<OpenLayers.Control>)} List of controls associated with the map.
     *
     * If not provided in the map options at construction, the map will
     *     by default be given the following controls if present in the build:
     *  - <OpenLayers.Control.Navigation> or <OpenLayers.Control.TouchNavigation>
     *  - <OpenLayers.Control.Zoom> or <OpenLayers.Control.PanZoom>
     *  - <OpenLayers.Control.ArgParser>
     *  - <OpenLayers.Control.Attribution>
     */
    controls: null,

    /**
     * Property: popups
     * {Array(<OpenLayers.Popup>)} List of popups associated with the map
     */
    popups: null,

    /**
     * APIProperty: baseLayer
     * {<OpenLayers.Layer>} The currently selected base layer.  This determines
     * min/max zoom level, projection, etc.
     */
    baseLayer: null,
    
    /**
     * Property: center
     * {<OpenLayers.LonLat>} The current center of the map
     */
    center: null,

    /**
     * Property: resolution
     * {Float} The resolution of the map.
     */
    resolution: null,

    /**
     * Property: zoom
     * {Integer} The current zoom level of the map
     */
    zoom: 0,    

    /**
     * Property: panRatio
     * {Float} The ratio of the current extent within
     *         which panning will tween.
     */
    panRatio: 1.5,    

    /**
     * APIProperty: options
     * {Object} The options object passed to the class constructor. Read-only.
     */
    options: null,

  // Options

    /**
     * APIProperty: tileSize
     * {<OpenLayers.Size>} Set in the map options to override the default tile
     *                     size for this map.
     */
    tileSize: null,

    /**
     * APIProperty: projection
     * {String} Set in the map options to specify the default projection 
     *          for layers added to this map. When using a projection other than EPSG:4326
     *          (CRS:84, Geographic) or EPSG:3857 (EPSG:900913, Web Mercator),
     *          also set maxExtent, maxResolution or resolutions.  Default is "EPSG:4326".
     *          Note that the projection of the map is usually determined
     *          by that of the current baseLayer (see <baseLayer> and <getProjectionObject>).
     */
    projection: "EPSG:4326",    
        
    /**
     * APIProperty: units
     * {String} The map units.  Possible values are 'degrees' (or 'dd'), 'm', 
     *     'ft', 'km', 'mi', 'inches'.  Normally taken from the projection.
     *     Only required if both map and layers do not define a projection,
     *     or if they define a projection which does not define units
     */
    units: null,

    /**
     * APIProperty: resolutions
     * {Array(Float)} A list of map resolutions (map units per pixel) in 
     *     descending order.  If this is not set in the layer constructor, it 
     *     will be set based on other resolution related properties 
     *     (maxExtent, maxResolution, maxScale, etc.).
     */
    resolutions: null,

    /**
     * APIProperty: maxResolution
     * {Float} Required if you are not displaying the whole world on a tile
     * with the size specified in <tileSize>.
     */
    maxResolution: null,

    /**
     * APIProperty: minResolution
     * {Float}
     */
    minResolution: null,

    /**
     * APIProperty: maxScale
     * {Float}
     */
    maxScale: null,

    /**
     * APIProperty: minScale
     * {Float}
     */
    minScale: null,

    /**
     * APIProperty: maxExtent
     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
     *     should consist of four values (left, bottom, right, top).
     *     The maximum extent for the map.  Defaults to the
     *     whole world in decimal degrees (-180, -90, 180, 90).  Specify a 
     *     different extent in the map options if you are not using a geographic
     *     projection and displaying the whole  world. To restrict user panning
     *     and zooming of the map, use <restrictedExtent> instead.  The value 
     *     for <maxExtent> will change calculations for tile URLs.
     */
    maxExtent: null,
    
    /**
     * APIProperty: minExtent
     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
     *     should consist of four values (left, bottom, right, top).
     *     The minimum extent for the map.  Defaults to null.
     */
    minExtent: null,
    
    /**
     * APIProperty: restrictedExtent
     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
     *     should consist of four values (left, bottom, right, top).
     *     Limit map navigation to this extent where possible.
     *     If a non-null restrictedExtent is set, panning will be restricted
     *     to the given bounds.  In addition, zooming to a resolution that
     *     displays more than the restricted extent will center the map
     *     on the restricted extent.  If you wish to limit the zoom level
     *     or resolution, use maxResolution.
     */
    restrictedExtent: null,

    /**
     * APIProperty: numZoomLevels
     * {Integer} Number of zoom levels for the map.  Defaults to 16.  Set a
     *           different value in the map options if needed.
     */
    numZoomLevels: 16,

    /**
     * APIProperty: theme
     * {String} Relative path to a CSS file from which to load theme styles.
     *          Specify null in the map options (e.g. {theme: null}) if you 
     *          want to get cascading style declarations - by putting links to 
     *          stylesheets or style declarations directly in your page.
     */
    theme: null,
    
    /** 
     * APIProperty: displayProjection
     * {<OpenLayers.Projection>} Requires proj4js support for projections other
     *     than EPSG:4326 or EPSG:900913/EPSG:3857. Projection used by
     *     several controls to display data to user. If this property is set,
     *     it will be set on any control which has a null displayProjection
     *     property at the time the control is added to the map. 
     */
    displayProjection: null,

    /**
     * APIProperty: fallThrough
     * {Boolean} Should OpenLayers allow events on the map to fall through to
     *           other elements on the page, or should it swallow them? (#457)
     *           Default is to fall through.
     */
    fallThrough: true,
    
    /**
     * Property: panTween
     * {<OpenLayers.Tween>} Animated panning tween object, see panTo()
     */
    panTween: null,

    /**
     * APIProperty: eventListeners
     * {Object} If set as an option at construction, the eventListeners
     *     object will be registered with <OpenLayers.Events.on>.  Object
     *     structure must be a listeners object as shown in the example for
     *     the events.on method.
     */
    eventListeners: null,

    /**
     * APIProperty: panMethod
     * {Function} The Easing function to be used for tweening.  Default is
     * OpenLayers.Easing.Expo.easeOut. Setting this to 'null' turns off
     * animated panning.
     */
    panMethod: OpenLayers.Easing.Expo.easeOut,
    
    /**
     * Property: panDuration
     * {Integer} The number of steps to be passed to the
     * OpenLayers.Tween.start() method when the map is
     * panned.
     * Default is 50.
     */
    panDuration: 50,
    
    /**
     * Property: paddingForPopups
     * {<OpenLayers.Bounds>} Outside margin of the popup. Used to prevent 
     *     the popup from getting too close to the map border.
     */
    paddingForPopups : null,
    
    /**
     * Property: minPx
     * {Object} An object with a 'x' and 'y' values that is the lower
     *     left of maxExtent in viewport pixel space.
     *     Used to verify in moveByPx that the new location we're moving to
     *     is valid. It is also used in the getLonLatFromViewPortPx function
     *     of Layer.
     */
    minPx: null,
    
    /**
     * Property: maxPx
     * {Object} An object with a 'x' and 'y' values that is the top
     *     right of maxExtent in viewport pixel space.
     *     Used to verify in moveByPx that the new location we're moving to
     *     is valid.
     */
    maxPx: null,
    
    /**
     * Constructor: OpenLayers.Map
     * Constructor for a new OpenLayers.Map instance.  There are two possible
     *     ways to call the map constructor.  See the examples below.
     *
     * Parameters:
     * div - {DOMElement|String}  The element or id of an element in your page
     *     that will contain the map.  May be omitted if the <div> option is
     *     provided or if you intend to call the <render> method later.
     * options - {Object} Optional object with properties to tag onto the map.
     *
     * Valid options (in addition to the listed API properties):
     * center - {<OpenLayers.LonLat>|Array} The default initial center of the map.
     *     If provided as array, the first value is the x coordinate,
     *     and the 2nd value is the y coordinate.
     *     Only specify if <layers> is provided.
     *     Note that if an ArgParser/Permalink control is present,
     *     and the querystring contains coordinates, center will be set
     *     by that, and this option will be ignored.
     * zoom - {Number} The initial zoom level for the map. Only specify if
     *     <layers> is provided.
     *     Note that if an ArgParser/Permalink control is present,
     *     and the querystring contains a zoom level, zoom will be set
     *     by that, and this option will be ignored.
     * extent - {<OpenLayers.Bounds>|Array} The initial extent of the map.
     *     If provided as an array, the array should consist of
     *     four values (left, bottom, right, top).
     *     Only specify if <center> and <zoom> are not provided.
     * 
     * Examples:
     * (code)
     * // create a map with default options in an element with the id "map1"
     * var map = new OpenLayers.Map("map1");
     *
     * // create a map with non-default options in an element with id "map2"
     * var options = {
     *     projection: "EPSG:3857",
     *     maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000),
     *     center: new OpenLayers.LonLat(-12356463.476333, 5621521.4854095)
     * };
     * var map = new OpenLayers.Map("map2", options);
     *
     * // map with non-default options - same as above but with a single argument,
     * // a restricted extent, and using arrays for bounds and center
     * var map = new OpenLayers.Map({
     *     div: "map_id",
     *     projection: "EPSG:3857",
     *     maxExtent: [-18924313.432222, -15538711.094146, 18924313.432222, 15538711.094146],
     *     restrictedExtent: [-13358338.893333, -9608371.5085962, 13358338.893333, 9608371.5085962],
     *     center: [-12356463.476333, 5621521.4854095]
     * });
     *
     * // create a map without a reference to a container - call render later
     * var map = new OpenLayers.Map({
     *     projection: "EPSG:3857",
     *     maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000)
     * });
     * (end)
     */    
    initialize: function (div, options) {
        
        // If only one argument is provided, check if it is an object.
        if(arguments.length === 1 && typeof div === "object") {
            options = div;
            div = options && options.div;
        }

        // Simple-type defaults are set in class definition. 
        //  Now set complex-type defaults 
        this.tileSize = new OpenLayers.Size(OpenLayers.Map.TILE_WIDTH,
                                            OpenLayers.Map.TILE_HEIGHT);
        
        this.paddingForPopups = new OpenLayers.Bounds(15, 15, 15, 15);

        this.theme = OpenLayers._getScriptLocation() + 
                             'theme/default/style.css'; 

        // backup original options
        this.options = OpenLayers.Util.extend({}, options);

        // now override default options 
        OpenLayers.Util.extend(this, options);
        
        var projCode = this.projection instanceof OpenLayers.Projection ?
            this.projection.projCode : this.projection;
        OpenLayers.Util.applyDefaults(this, OpenLayers.Projection.defaults[projCode]);
        
        // allow extents and center to be arrays
        if (this.maxExtent && !(this.maxExtent instanceof OpenLayers.Bounds)) {
            this.maxExtent = new OpenLayers.Bounds(this.maxExtent);
        }
        if (this.minExtent && !(this.minExtent instanceof OpenLayers.Bounds)) {
            this.minExtent = new OpenLayers.Bounds(this.minExtent);
        }
        if (this.restrictedExtent && !(this.restrictedExtent instanceof OpenLayers.Bounds)) {
            this.restrictedExtent = new OpenLayers.Bounds(this.restrictedExtent);
        }
        if (this.center && !(this.center instanceof OpenLayers.LonLat)) {
            this.center = new OpenLayers.LonLat(this.center);
        }

        // initialize layers array
        this.layers = [];

        this.id = OpenLayers.Util.createUniqueID("OpenLayers.Map_");

        this.div = OpenLayers.Util.getElement(div);
        if(!this.div) {
            this.div = document.createElement("div");
            this.div.style.height = "1px";
            this.div.style.width = "1px";
        }
        
        OpenLayers.Element.addClass(this.div, 'olMap');

        // the viewPortDiv is the outermost div we modify
        var id = this.id + "_OpenLayers_ViewPort";
        this.viewPortDiv = OpenLayers.Util.createDiv(id, null, null, null,
                                                     "relative", null,
                                                     "hidden");
        this.viewPortDiv.style.width = "100%";
        this.viewPortDiv.style.height = "100%";
        this.viewPortDiv.className = "olMapViewport";
        this.div.appendChild(this.viewPortDiv);

        this.events = new OpenLayers.Events(
            this, this.viewPortDiv, null, this.fallThrough, 
            {includeXY: true}
        );

        // the layerContainerDiv is the one that holds all the layers
        id = this.id + "_OpenLayers_Container";
        this.layerContainerDiv = OpenLayers.Util.createDiv(id);
        this.layerContainerDiv.style.width = '100px';
        this.layerContainerDiv.style.height = '100px';
        this.layerContainerDiv.style.zIndex=this.Z_INDEX_BASE['Popup']-1;
        
        this.viewPortDiv.appendChild(this.layerContainerDiv);

        this.updateSize();
        if(this.eventListeners instanceof Object) {
            this.events.on(this.eventListeners);
        }
 
        // Because Mozilla does not support the "resize" event for elements 
        // other than "window", we need to put a hack here. 
        if (parseFloat(navigator.appVersion.split("MSIE")[1]) < 9) {
            // If IE < 9, register the resize on the div
            this.events.register("resize", this, this.updateSize);
        } else {
            // Else updateSize on catching the window's resize
            //  Note that this is ok, as updateSize() does nothing if the 
            //  map's size has not actually changed.
            this.updateSizeDestroy = OpenLayers.Function.bind(this.updateSize, 
                this);
            OpenLayers.Event.observe(window, 'resize',
                            this.updateSizeDestroy);
        }
        
        // only append link stylesheet if the theme property is set
        if(this.theme) {
            // check existing links for equivalent url
            var addNode = true;
            var nodes = document.getElementsByTagName('link');
            for(var i=0, len=nodes.length; i<len; ++i) {
                if(OpenLayers.Util.isEquivalentUrl(nodes.item(i).href,
                                                   this.theme)) {
                    addNode = false;
                    break;
                }
            }
            // only add a new node if one with an equivalent url hasn't already
            // been added
            if(addNode) {
                var cssNode = document.createElement('link');
                cssNode.setAttribute('rel', 'stylesheet');
                cssNode.setAttribute('type', 'text/css');
                cssNode.setAttribute('href', this.theme);
                document.getElementsByTagName('head')[0].appendChild(cssNode);
            }
        }
        
        if (this.controls == null) { // default controls
            this.controls = [];
            if (OpenLayers.Control != null) { // running full or lite?
                // Navigation or TouchNavigation depending on what is in build
                if (OpenLayers.Control.Navigation) {
                    this.controls.push(new OpenLayers.Control.Navigation());
                } else if (OpenLayers.Control.TouchNavigation) {
                    this.controls.push(new OpenLayers.Control.TouchNavigation());
                }
                if (OpenLayers.Control.Zoom) {
                    this.controls.push(new OpenLayers.Control.Zoom());
                } else if (OpenLayers.Control.PanZoom) {
                    this.controls.push(new OpenLayers.Control.PanZoom());
                }

                if (OpenLayers.Control.ArgParser) {
                    this.controls.push(new OpenLayers.Control.ArgParser());
                }
                if (OpenLayers.Control.Attribution) {
                    this.controls.push(new OpenLayers.Control.Attribution());
                }
            }
        }

        for(var i=0, len=this.controls.length; i<len; i++) {
            this.addControlToMap(this.controls[i]);
        }

        this.popups = [];

        this.unloadDestroy = OpenLayers.Function.bind(this.destroy, this);
        

        // always call map.destroy()
        OpenLayers.Event.observe(window, 'unload', this.unloadDestroy);
        
        // add any initial layers
        if (options && options.layers) {
            /** 
             * If you have set options.center, the map center property will be
             * set at this point.  However, since setCenter has not been called,
             * addLayers gets confused.  So we delete the map center in this 
             * case.  Because the check below uses options.center, it will
             * be properly set below.
             */
            delete this.center;
            this.addLayers(options.layers);
            // set center (and optionally zoom)
            if (options.center && !this.getCenter()) {
                // zoom can be undefined here
                this.setCenter(options.center, options.zoom);
            }
        }
    },

    /** 
     * APIMethod: getViewport
     * Get the DOMElement representing the view port.
     *
     * Returns:
     * {DOMElement}
     */
    getViewport: function() {
        return this.viewPortDiv;
    },
    
    /**
     * APIMethod: render
     * Render the map to a specified container.
     * 
     * Parameters:
     * div - {String|DOMElement} The container that the map should be rendered
     *     to. If different than the current container, the map viewport
     *     will be moved from the current to the new container.
     */
    render: function(div) {
        this.div = OpenLayers.Util.getElement(div);
        OpenLayers.Element.addClass(this.div, 'olMap');
        this.viewPortDiv.parentNode.removeChild(this.viewPortDiv);
        this.div.appendChild(this.viewPortDiv);
        this.updateSize();
    },

    /**
     * Method: unloadDestroy
     * Function that is called to destroy the map on page unload. stored here
     *     so that if map is manually destroyed, we can unregister this.
     */
    unloadDestroy: null,
    
    /**
     * Method: updateSizeDestroy
     * When the map is destroyed, we need to stop listening to updateSize
     *    events: this method stores the function we need to unregister in 
     *    non-IE browsers.
     */
    updateSizeDestroy: null,

    /**
     * APIMethod: destroy
     * Destroy this map.
     *    Note that if you are using an application which removes a container
     *    of the map from the DOM, you need to ensure that you destroy the
     *    map *before* this happens; otherwise, the page unload handler
     *    will fail because the DOM elements that map.destroy() wants
     *    to clean up will be gone. (See 
     *    http://trac.osgeo.org/openlayers/ticket/2277 for more information).
     *    This will apply to GeoExt and also to other applications which
     *    modify the DOM of the container of the OpenLayers Map.
     */
    destroy:function() {
        // if unloadDestroy is null, we've already been destroyed
        if (!this.unloadDestroy) {
            return false;
        }
        
        // make sure panning doesn't continue after destruction
        if(this.panTween) {
            this.panTween.stop();
            this.panTween = null;
        }

        // map has been destroyed. dont do it again!
        OpenLayers.Event.stopObserving(window, 'unload', this.unloadDestroy);
        this.unloadDestroy = null;

        if (this.updateSizeDestroy) {
            OpenLayers.Event.stopObserving(window, 'resize', 
                                           this.updateSizeDestroy);
        } else {
            this.events.unregister("resize", this, this.updateSize);
        }    
        
        this.paddingForPopups = null;    

        if (this.controls != null) {
            for (var i = this.controls.length - 1; i>=0; --i) {
                this.controls[i].destroy();
            } 
            this.controls = null;
        }
        if (this.layers != null) {
            for (var i = this.layers.length - 1; i>=0; --i) {
                //pass 'false' to destroy so that map wont try to set a new 
                // baselayer after each baselayer is removed
                this.layers[i].destroy(false);
            } 
            this.layers = null;
        }
        if (this.viewPortDiv) {
            this.div.removeChild(this.viewPortDiv);
        }
        this.viewPortDiv = null;

        if(this.eventListeners) {
            this.events.un(this.eventListeners);
            this.eventListeners = null;
        }
        this.events.destroy();
        this.events = null;

        this.options = null;
    },

    /**
     * APIMethod: setOptions
     * Change the map options
     *
     * Parameters:
     * options - {Object} Hashtable of options to tag to the map
     */
    setOptions: function(options) {
        var updatePxExtent = this.minPx &&
            options.restrictedExtent != this.restrictedExtent;
        OpenLayers.Util.extend(this, options);
        // force recalculation of minPx and maxPx
        updatePxExtent && this.moveTo(this.getCachedCenter(), this.zoom, {
            forceZoomChange: true
        });
    },

    /**
     * APIMethod: getTileSize
     * Get the tile size for the map
     *
     * Returns:
     * {<OpenLayers.Size>}
     */
     getTileSize: function() {
         return this.tileSize;
     },


    /**
     * APIMethod: getBy
     * Get a list of objects given a property and a match item.
     *
     * Parameters:
     * array - {String} A property on the map whose value is an array.
     * property - {String} A property on each item of the given array.
     * match - {String | Object} A string to match.  Can also be a regular
     *     expression literal or object.  In addition, it can be any object
     *     with a method named test.  For reqular expressions or other, if
     *     match.test(map[array][i][property]) evaluates to true, the item will
     *     be included in the array returned.  If no items are found, an empty
     *     array is returned.
     *
     * Returns:
     * {Array} An array of items where the given property matches the given
     *     criteria.
     */
    getBy: function(array, property, match) {
        var test = (typeof match.test == "function");
        var found = OpenLayers.Array.filter(this[array], function(item) {
            return item[property] == match || (test && match.test(item[property]));
        });
        return found;
    },

    /**
     * APIMethod: getLayersBy
     * Get a list of layers with properties matching the given criteria.
     *
     * Parameters:
     * property - {String} A layer property to be matched.
     * match - {String | Object} A string to match.  Can also be a regular
     *     expression literal or object.  In addition, it can be any object
     *     with a method named test.  For reqular expressions or other, if
     *     match.test(layer[property]) evaluates to true, the layer will be
     *     included in the array returned.  If no layers are found, an empty
     *     array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Layer>)} A list of layers matching the given criteria.
     *     An empty array is returned if no matches are found.
     */
    getLayersBy: function(property, match) {
        return this.getBy("layers", property, match);
    },

    /**
     * APIMethod: getLayersByName
     * Get a list of layers with names matching the given name.
     *
     * Parameters:
     * match - {String | Object} A layer name.  The name can also be a regular
     *     expression literal or object.  In addition, it can be any object
     *     with a method named test.  For reqular expressions or other, if
     *     name.test(layer.name) evaluates to true, the layer will be included
     *     in the list of layers returned.  If no layers are found, an empty
     *     array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Layer>)} A list of layers matching the given name.
     *     An empty array is returned if no matches are found.
     */
    getLayersByName: function(match) {
        return this.getLayersBy("name", match);
    },

    /**
     * APIMethod: getLayersByClass
     * Get a list of layers of a given class (CLASS_NAME).
     *
     * Parameters:
     * match - {String | Object} A layer class name.  The match can also be a
     *     regular expression literal or object.  In addition, it can be any
     *     object with a method named test.  For reqular expressions or other,
     *     if type.test(layer.CLASS_NAME) evaluates to true, the layer will
     *     be included in the list of layers returned.  If no layers are
     *     found, an empty array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Layer>)} A list of layers matching the given class.
     *     An empty array is returned if no matches are found.
     */
    getLayersByClass: function(match) {
        return this.getLayersBy("CLASS_NAME", match);
    },

    /**
     * APIMethod: getControlsBy
     * Get a list of controls with properties matching the given criteria.
     *
     * Parameters:
     * property - {String} A control property to be matched.
     * match - {String | Object} A string to match.  Can also be a regular
     *     expression literal or object.  In addition, it can be any object
     *     with a method named test.  For reqular expressions or other, if
     *     match.test(layer[property]) evaluates to true, the layer will be
     *     included in the array returned.  If no layers are found, an empty
     *     array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Control>)} A list of controls matching the given
     *     criteria.  An empty array is returned if no matches are found.
     */
    getControlsBy: function(property, match) {
        return this.getBy("controls", property, match);
    },

    /**
     * APIMethod: getControlsByClass
     * Get a list of controls of a given class (CLASS_NAME).
     *
     * Parameters:
     * match - {String | Object} A control class name.  The match can also be a
     *     regular expression literal or object.  In addition, it can be any
     *     object with a method named test.  For reqular expressions or other,
     *     if type.test(control.CLASS_NAME) evaluates to true, the control will
     *     be included in the list of controls returned.  If no controls are
     *     found, an empty array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Control>)} A list of controls matching the given class.
     *     An empty array is returned if no matches are found.
     */
    getControlsByClass: function(match) {
        return this.getControlsBy("CLASS_NAME", match);
    },

  /********************************************************/
  /*                                                      */
  /*                  Layer Functions                     */
  /*                                                      */
  /*     The following functions deal with adding and     */
  /*        removing Layers to and from the Map           */
  /*                                                      */
  /********************************************************/         

    /**
     * APIMethod: getLayer
     * Get a layer based on its id
     *
     * Parameters:
     * id - {String} A layer id
     *
     * Returns:
     * {<OpenLayers.Layer>} The Layer with the corresponding id from the map's 
     *                      layer collection, or null if not found.
     */
    getLayer: function(id) {
        var foundLayer = null;
        for (var i=0, len=this.layers.length; i<len; i++) {
            var layer = this.layers[i];
            if (layer.id == id) {
                foundLayer = layer;
                break;
            }
        }
        return foundLayer;
    },

    /**
    * Method: setLayerZIndex
    * 
    * Parameters:
    * layer - {<OpenLayers.Layer>} 
    * zIdx - {int} 
    */    
    setLayerZIndex: function (layer, zIdx) {
        layer.setZIndex(
            this.Z_INDEX_BASE[layer.isBaseLayer ? 'BaseLayer' : 'Overlay']
            + zIdx * 5 );
    },

    /**
     * Method: resetLayersZIndex
     * Reset each layer's z-index based on layer's array index
     */
    resetLayersZIndex: function() {
        for (var i=0, len=this.layers.length; i<len; i++) {
            var layer = this.layers[i];
            this.setLayerZIndex(layer, i);
        }
    },

    /**
    * APIMethod: addLayer
    *
    * Parameters:
    * layer - {<OpenLayers.Layer>} 
    *
    * Returns:
    * {Boolean} True if the layer has been added to the map.
    */    
    addLayer: function (layer) {
        for(var i = 0, len = this.layers.length; i < len; i++) {
            if (this.layers[i] == layer) {
                return false;
            }
        }
        if (this.events.triggerEvent("preaddlayer", {layer: layer}) === false) {
            return false;
        }
        if(this.allOverlays) {
            layer.isBaseLayer = false;
        }
        
        layer.div.className = "olLayerDiv";
        layer.div.style.overflow = "";
        this.setLayerZIndex(layer, this.layers.length);

        if (layer.isFixed) {
            this.viewPortDiv.appendChild(layer.div);
        } else {
            this.layerContainerDiv.appendChild(layer.div);
        }
        this.layers.push(layer);
        layer.setMap(this);

        if (layer.isBaseLayer || (this.allOverlays && !this.baseLayer))  {
            if (this.baseLayer == null) {
                // set the first baselaye we add as the baselayer
                this.setBaseLayer(layer);
            } else {
                layer.setVisibility(false);
            }
        } else {
            layer.redraw();
        }

        this.events.triggerEvent("addlayer", {layer: layer});
        layer.events.triggerEvent("added", {map: this, layer: layer});
        layer.afterAdd();

        return true;
    },

    /**
    * APIMethod: addLayers 
    *
    * Parameters:
    * layers - {Array(<OpenLayers.Layer>)} 
    */    
    addLayers: function (layers) {
        for (var i=0, len=layers.length; i<len; i++) {
            this.addLayer(layers[i]);
        }
    },

    /** 
     * APIMethod: removeLayer
     * Removes a layer from the map by removing its visual element (the 
     *   layer.div property), then removing it from the map's internal list 
     *   of layers, setting the layer's map property to null. 
     * 
     *   a "removelayer" event is triggered.
     * 
     *   very worthy of mention is that simply removing a layer from a map
     *   will not cause the removal of any popups which may have been created
     *   by the layer. this is due to the fact that it was decided at some
     *   point that popups would not belong to layers. thus there is no way 
     *   for us to know here to which layer the popup belongs.
     *    
     *     A simple solution to this is simply to call destroy() on the layer.
     *     the default OpenLayers.Layer class's destroy() function
     *     automatically takes care to remove itself from whatever map it has
     *     been attached to. 
     * 
     *     The correct solution is for the layer itself to register an 
     *     event-handler on "removelayer" and when it is called, if it 
     *     recognizes itself as the layer being removed, then it cycles through
     *     its own personal list of popups, removing them from the map.
     * 
     * Parameters:
     * layer - {<OpenLayers.Layer>} 
     * setNewBaseLayer - {Boolean} Default is true
     */
    removeLayer: function(layer, setNewBaseLayer) {
        if (this.events.triggerEvent("preremovelayer", {layer: layer}) === false) {
            return;
        }
        if (setNewBaseLayer == null) {
            setNewBaseLayer = true;
        }

        if (layer.isFixed) {
            this.viewPortDiv.removeChild(layer.div);
        } else {
            this.layerContainerDiv.removeChild(layer.div);
        }
        OpenLayers.Util.removeItem(this.layers, layer);
        layer.removeMap(this);
        layer.map = null;

        // if we removed the base layer, need to set a new one
        if(this.baseLayer == layer) {
            this.baseLayer = null;
            if(setNewBaseLayer) {
                for(var i=0, len=this.layers.length; i<len; i++) {
                    var iLayer = this.layers[i];
                    if (iLayer.isBaseLayer || this.allOverlays) {
                        this.setBaseLayer(iLayer);
                        break;
                    }
                }
            }
        }

        this.resetLayersZIndex();

        this.events.triggerEvent("removelayer", {layer: layer});
        layer.events.triggerEvent("removed", {map: this, layer: layer});
    },

    /**
     * APIMethod: getNumLayers
     * 
     * Returns:
     * {Int} The number of layers attached to the map.
     */
    getNumLayers: function () {
        return this.layers.length;
    },

    /** 
     * APIMethod: getLayerIndex
     *
     * Parameters:
     * layer - {<OpenLayers.Layer>}
     *
     * Returns:
     * {Integer} The current (zero-based) index of the given layer in the map's
     *           layer stack. Returns -1 if the layer isn't on the map.
     */
    getLayerIndex: function (layer) {
        return OpenLayers.Util.indexOf(this.layers, layer);
    },
    
    /** 
     * APIMethod: setLayerIndex
     * Move the given layer to the specified (zero-based) index in the layer
     *     list, changing its z-index in the map display. Use
     *     map.getLayerIndex() to find out the current index of a layer. Note
     *     that this cannot (or at least should not) be effectively used to
     *     raise base layers above overlays.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer>} 
     * idx - {int} 
     */
    setLayerIndex: function (layer, idx) {
        var base = this.getLayerIndex(layer);
        if (idx < 0) {
            idx = 0;
        } else if (idx > this.layers.length) {
            idx = this.layers.length;
        }
        if (base != idx) {
            this.layers.splice(base, 1);
            this.layers.splice(idx, 0, layer);
            for (var i=0, len=this.layers.length; i<len; i++) {
                this.setLayerZIndex(this.layers[i], i);
            }
            this.events.triggerEvent("changelayer", {
                layer: layer, property: "order"
            });
            if(this.allOverlays) {
                if(idx === 0) {
                    this.setBaseLayer(layer);
                } else if(this.baseLayer !== this.layers[0]) {
                    this.setBaseLayer(this.layers[0]);
                }
            }
        }
    },

    /** 
     * APIMethod: raiseLayer
     * Change the index of the given layer by delta. If delta is positive, 
     *     the layer is moved up the map's layer stack; if delta is negative,
     *     the layer is moved down.  Again, note that this cannot (or at least
     *     should not) be effectively used to raise base layers above overlays.
     *
     * Paremeters:
     * layer - {<OpenLayers.Layer>} 
     * delta - {int} 
     */
    raiseLayer: function (layer, delta) {
        var idx = this.getLayerIndex(layer) + delta;
        this.setLayerIndex(layer, idx);
    },
    
    /** 
     * APIMethod: setBaseLayer
     * Allows user to specify one of the currently-loaded layers as the Map's
     *     new base layer.
     * 
     * Parameters:
     * newBaseLayer - {<OpenLayers.Layer>}
     */
    setBaseLayer: function(newBaseLayer) {
        
        if (newBaseLayer != this.baseLayer) {
          
            // ensure newBaseLayer is already loaded
            if (OpenLayers.Util.indexOf(this.layers, newBaseLayer) != -1) {

                // preserve center and scale when changing base layers
                var center = this.getCachedCenter();
                var newResolution = OpenLayers.Util.getResolutionFromScale(
                    this.getScale(), newBaseLayer.units
                );

                // make the old base layer invisible 
                if (this.baseLayer != null && !this.allOverlays) {
                    this.baseLayer.setVisibility(false);
                }

                // set new baselayer
                this.baseLayer = newBaseLayer;
                
                if(!this.allOverlays || this.baseLayer.visibility) {
                    this.baseLayer.setVisibility(true);
                    // Layer may previously have been visible but not in range.
                    // In this case we need to redraw it to make it visible.
                    if (this.baseLayer.inRange === false) {
                        this.baseLayer.redraw();
                    }
                }

                // recenter the map
                if (center != null) {
                    // new zoom level derived from old scale
                    var newZoom = this.getZoomForResolution(
                        newResolution || this.resolution, true
                    );
                    // zoom and force zoom change
                    this.setCenter(center, newZoom, false, true);
                }

                this.events.triggerEvent("changebaselayer", {
                    layer: this.baseLayer
                });
            }        
        }
    },


  /********************************************************/
  /*                                                      */
  /*                 Control Functions                    */
  /*                                                      */
  /*     The following functions deal with adding and     */
  /*        removing Controls to and from the Map         */
  /*                                                      */
  /********************************************************/         

    /**
     * APIMethod: addControl
     * Add the passed over control to the map. Optionally 
     *     position the control at the given pixel.
     * 
     * Parameters:
     * control - {<OpenLayers.Control>}
     * px - {<OpenLayers.Pixel>}
     */    
    addControl: function (control, px) {
        this.controls.push(control);
        this.addControlToMap(control, px);
    },
    
    /**
     * APIMethod: addControls
     * Add all of the passed over controls to the map. 
     *     You can pass over an optional second array
     *     with pixel-objects to position the controls.
     *     The indices of the two arrays should match and
     *     you can add null as pixel for those controls 
     *     you want to be autopositioned.   
     *     
     * Parameters:
     * controls - {Array(<OpenLayers.Control>)}
     * pixels - {Array(<OpenLayers.Pixel>)}
     */    
    addControls: function (controls, pixels) {
        var pxs = (arguments.length === 1) ? [] : pixels;
        for (var i=0, len=controls.length; i<len; i++) {
            var ctrl = controls[i];
            var px = (pxs[i]) ? pxs[i] : null;
            this.addControl( ctrl, px );
        }
    },

    /**
     * Method: addControlToMap
     * 
     * Parameters:
     * 
     * control - {<OpenLayers.Control>}
     * px - {<OpenLayers.Pixel>}
     */    
    addControlToMap: function (control, px) {
        // If a control doesn't have a div at this point, it belongs in the
        // viewport.
        control.outsideViewport = (control.div != null);
        
        // If the map has a displayProjection, and the control doesn't, set 
        // the display projection.
        if (this.displayProjection && !control.displayProjection) {
            control.displayProjection = this.displayProjection;
        }    
        
        control.setMap(this);
        var div = control.draw(px);
        if (div) {
            if(!control.outsideViewport) {
                div.style.zIndex = this.Z_INDEX_BASE['Control'] +
                                    this.controls.length;
                this.viewPortDiv.appendChild( div );
            }
        }
        if(control.autoActivate) {
            control.activate();
        }
    },
    
    /**
     * APIMethod: getControl
     * 
     * Parameters:
     * id - {String} ID of the control to return.
     * 
     * Returns:
     * {<OpenLayers.Control>} The control from the map's list of controls 
     *                        which has a matching 'id'. If none found, 
     *                        returns null.
     */    
    getControl: function (id) {
        var returnControl = null;
        for(var i=0, len=this.controls.length; i<len; i++) {
            var control = this.controls[i];
            if (control.id == id) {
                returnControl = control;
                break;
            }
        }
        return returnControl;
    },
    
    /** 
     * APIMethod: removeControl
     * Remove a control from the map. Removes the control both from the map 
     *     object's internal array of controls, as well as from the map's 
     *     viewPort (assuming the control was not added outsideViewport)
     * 
     * Parameters:
     * control - {<OpenLayers.Control>} The control to remove.
     */    
    removeControl: function (control) {
        //make sure control is non-null and actually part of our map
        if ( (control) && (control == this.getControl(control.id)) ) {
            if (control.div && (control.div.parentNode == this.viewPortDiv)) {
                this.viewPortDiv.removeChild(control.div);
            }
            OpenLayers.Util.removeItem(this.controls, control);
        }
    },

  /********************************************************/
  /*                                                      */
  /*                  Popup Functions                     */
  /*                                                      */
  /*     The following functions deal with adding and     */
  /*        removing Popups to and from the Map           */
  /*                                                      */
  /********************************************************/         

    /** 
     * APIMethod: addPopup
     * 
     * Parameters:
     * popup - {<OpenLayers.Popup>}
     * exclusive - {Boolean} If true, closes all other popups first
     */
    addPopup: function(popup, exclusive) {

        if (exclusive) {
            //remove all other popups from screen
            for (var i = this.popups.length - 1; i >= 0; --i) {
                this.removePopup(this.popups[i]);
            }
        }

        popup.map = this;
        this.popups.push(popup);
        var popupDiv = popup.draw();
        if (popupDiv) {
            popupDiv.style.zIndex = this.Z_INDEX_BASE['Popup'] +
                                    this.popups.length;
            this.layerContainerDiv.appendChild(popupDiv);
        }
    },
    
    /** 
    * APIMethod: removePopup
    * 
    * Parameters:
    * popup - {<OpenLayers.Popup>}
    */
    removePopup: function(popup) {
        OpenLayers.Util.removeItem(this.popups, popup);
        if (popup.div) {
            try { this.layerContainerDiv.removeChild(popup.div); }
            catch (e) { } // Popups sometimes apparently get disconnected
                      // from the layerContainerDiv, and cause complaints.
        }
        popup.map = null;
    },

  /********************************************************/
  /*                                                      */
  /*              Container Div Functions                 */
  /*                                                      */
  /*   The following functions deal with the access to    */
  /*    and maintenance of the size of the container div  */
  /*                                                      */
  /********************************************************/     

    /**
     * APIMethod: getSize
     * 
     * Returns:
     * {<OpenLayers.Size>} An <OpenLayers.Size> object that represents the 
     *                     size, in pixels, of the div into which OpenLayers 
     *                     has been loaded. 
     *                     Note - A clone() of this locally cached variable is
     *                     returned, so as not to allow users to modify it.
     */
    getSize: function () {
        var size = null;
        if (this.size != null) {
            size = this.size.clone();
        }
        return size;
    },

    /**
     * APIMethod: updateSize
     * This function should be called by any external code which dynamically
     *     changes the size of the map div (because mozilla wont let us catch 
     *     the "onresize" for an element)
     */
    updateSize: function() {
        // the div might have moved on the page, also
        var newSize = this.getCurrentSize();
        if (newSize && !isNaN(newSize.h) && !isNaN(newSize.w)) {
            this.events.clearMouseCache();
            var oldSize = this.getSize();
            if (oldSize == null) {
                this.size = oldSize = newSize;
            }
            if (!newSize.equals(oldSize)) {
                
                // store the new size
                this.size = newSize;
    
                //notify layers of mapresize
                for(var i=0, len=this.layers.length; i<len; i++) {
                    this.layers[i].onMapResize();                
                }
    
                var center = this.getCachedCenter();
    
                if (this.baseLayer != null && center != null) {
                    var zoom = this.getZoom();
                    this.zoom = null;
                    this.setCenter(center, zoom);
                }
    
            }
        }
    },
    
    /**
     * Method: getCurrentSize
     * 
     * Returns:
     * {<OpenLayers.Size>} A new <OpenLayers.Size> object with the dimensions 
     *                     of the map div
     */
    getCurrentSize: function() {

        var size = new OpenLayers.Size(this.div.clientWidth, 
                                       this.div.clientHeight);

        if (size.w == 0 && size.h == 0 || isNaN(size.w) && isNaN(size.h)) {
            size.w = this.div.offsetWidth;
            size.h = this.div.offsetHeight;
        }
        if (size.w == 0 && size.h == 0 || isNaN(size.w) && isNaN(size.h)) {
            size.w = parseInt(this.div.style.width);
            size.h = parseInt(this.div.style.height);
        }
        return size;
    },

    /** 
     * Method: calculateBounds
     * 
     * Parameters:
     * center - {<OpenLayers.LonLat>} Default is this.getCenter()
     * resolution - {float} Default is this.getResolution() 
     * 
     * Returns:
     * {<OpenLayers.Bounds>} A bounds based on resolution, center, and 
     *                       current mapsize.
     */
    calculateBounds: function(center, resolution) {

        var extent = null;
        
        if (center == null) {
            center = this.getCachedCenter();
        }                
        if (resolution == null) {
            resolution = this.getResolution();
        }
    
        if ((center != null) && (resolution != null)) {
            var halfWDeg = (this.size.w * resolution) / 2;
            var halfHDeg = (this.size.h * resolution) / 2;
        
            extent = new OpenLayers.Bounds(center.lon - halfWDeg,
                                           center.lat - halfHDeg,
                                           center.lon + halfWDeg,
                                           center.lat + halfHDeg);
        }

        return extent;
    },


  /********************************************************/
  /*                                                      */
  /*            Zoom, Center, Pan Functions               */
  /*                                                      */
  /*    The following functions handle the validation,    */
  /*   getting and setting of the Zoom Level and Center   */
  /*       as well as the panning of the Map              */
  /*                                                      */
  /********************************************************/
    /**
     * APIMethod: getCenter
     * 
     * Returns:
     * {<OpenLayers.LonLat>}
     */
    getCenter: function () {
        var center = null;
        var cachedCenter = this.getCachedCenter();
        if (cachedCenter) {
            center = cachedCenter.clone();
        }
        return center;
    },

    /**
     * Method: getCachedCenter
     *
     * Returns:
     * {<OpenLayers.LonLat>}
     */
    getCachedCenter: function() {
        if (!this.center && this.size) {
            this.center = this.getLonLatFromViewPortPx({
                x: this.size.w / 2,
                y: this.size.h / 2
            });
        }
        return this.center;
    },

    /**
     * APIMethod: getZoom
     * 
     * Returns:
     * {Integer}
     */
    getZoom: function () {
        return this.zoom;
    },
    
    /** 
     * APIMethod: pan
     * Allows user to pan by a value of screen pixels
     * 
     * Parameters:
     * dx - {Integer}
     * dy - {Integer}
     * options - {Object} Options to configure panning:
     *  - *animate* {Boolean} Use panTo instead of setCenter. Default is true.
     *  - *dragging* {Boolean} Call setCenter with dragging true.  Default is
     *    false.
     */
    pan: function(dx, dy, options) {
        options = OpenLayers.Util.applyDefaults(options, {
            animate: true,
            dragging: false
        });
        if (options.dragging) {
            if (dx != 0 || dy != 0) {
                this.moveByPx(dx, dy);
            }
        } else {
            // getCenter
            var centerPx = this.getViewPortPxFromLonLat(this.getCachedCenter());

            // adjust
            var newCenterPx = centerPx.add(dx, dy);

            if (this.dragging || !newCenterPx.equals(centerPx)) {
                var newCenterLonLat = this.getLonLatFromViewPortPx(newCenterPx);
                if (options.animate) {
                    this.panTo(newCenterLonLat);
                } else {
                    this.moveTo(newCenterLonLat);
                    if(this.dragging) {
                        this.dragging = false;
                        this.events.triggerEvent("moveend");
                    }
                }    
            }
        }        

   },
   
   /** 
     * APIMethod: panTo
     * Allows user to pan to a new lonlat
     * If the new lonlat is in the current extent the map will slide smoothly
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     */
    panTo: function(lonlat) {
        if (this.panMethod && this.getExtent().scale(this.panRatio).containsLonLat(lonlat)) {
            if (!this.panTween) {
                this.panTween = new OpenLayers.Tween(this.panMethod);
            }
            var center = this.getCachedCenter();

            // center will not change, don't do nothing
            if (lonlat.equals(center)) {
                return;
            }

            var from = this.getPixelFromLonLat(center);
            var to = this.getPixelFromLonLat(lonlat);
            var vector = { x: to.x - from.x, y: to.y - from.y };
            var last = { x: 0, y: 0 };

            this.panTween.start( { x: 0, y: 0 }, vector, this.panDuration, {
                callbacks: {
                    eachStep: OpenLayers.Function.bind(function(px) {
                        var x = px.x - last.x,
                            y = px.y - last.y;
                        this.moveByPx(x, y);
                        last.x = Math.round(px.x);
                        last.y = Math.round(px.y);
                    }, this),
                    done: OpenLayers.Function.bind(function(px) {
                        this.moveTo(lonlat);
                        this.dragging = false;
                        this.events.triggerEvent("moveend");
                    }, this)
                }
            });
        } else {
            this.setCenter(lonlat);
        }
    },

    /**
     * APIMethod: setCenter
     * Set the map center (and optionally, the zoom level).
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>|Array} The new center location.
     *     If provided as array, the first value is the x coordinate,
     *     and the 2nd value is the y coordinate.
     * zoom - {Integer} Optional zoom level.
     * dragging - {Boolean} Specifies whether or not to trigger 
     *                      movestart/end events
     * forceZoomChange - {Boolean} Specifies whether or not to trigger zoom 
     *                             change events (needed on baseLayer change)
     *
     * TBD: reconsider forceZoomChange in 3.0
     */
    setCenter: function(lonlat, zoom, dragging, forceZoomChange) {
        this.panTween && this.panTween.stop();             
        this.moveTo(lonlat, zoom, {
            'dragging': dragging,
            'forceZoomChange': forceZoomChange
        });
    },
    
    /** 
     * Method: moveByPx
     * Drag the map by pixels.
     *
     * Parameters:
     * dx - {Number}
     * dy - {Number}
     */
    moveByPx: function(dx, dy) {
        var hw = this.size.w / 2;
        var hh = this.size.h / 2;
        var x = hw + dx;
        var y = hh + dy;
        var wrapDateLine = this.baseLayer.wrapDateLine;
        var xRestriction = 0;
        var yRestriction = 0;
        if (this.restrictedExtent) {
            xRestriction = hw;
            yRestriction = hh;
            // wrapping the date line makes no sense for restricted extents
            wrapDateLine = false;
        }
        dx = wrapDateLine ||
                    x <= this.maxPx.x - xRestriction &&
                    x >= this.minPx.x + xRestriction ? Math.round(dx) : 0;
        dy = y <= this.maxPx.y - yRestriction &&
                    y >= this.minPx.y + yRestriction ? Math.round(dy) : 0;
        if (dx || dy) {
            if (!this.dragging) {
                this.dragging = true;
                this.events.triggerEvent("movestart");
            }
            this.center = null;
            if (dx) {
                this.layerContainerDiv.style.left =
                    parseInt(this.layerContainerDiv.style.left) - dx + "px";
                this.minPx.x -= dx;
                this.maxPx.x -= dx;
            }
            if (dy) {
                this.layerContainerDiv.style.top =
                    parseInt(this.layerContainerDiv.style.top) - dy + "px";
                this.minPx.y -= dy;
                this.maxPx.y -= dy;
            }
            var layer, i, len;
            for (i=0, len=this.layers.length; i<len; ++i) {
                layer = this.layers[i];
                if (layer.visibility &&
                    (layer === this.baseLayer || layer.inRange)) {
                    layer.moveByPx(dx, dy);
                    layer.events.triggerEvent("move");
                }
            }
            this.events.triggerEvent("move");
        }
    },
    
    /**
     * Method: adjustZoom
     *
     * Parameters:
     * zoom - {Number} The zoom level to adjust
     *
     * Returns:
     * {Integer} Adjusted zoom level that shows a map not wider than its
     * <baseLayer>'s maxExtent.
     */
    adjustZoom: function(zoom) {
        var resolution, resolutions = this.baseLayer.resolutions,
            maxResolution = this.getMaxExtent().getWidth() / this.size.w;
        if (this.getResolutionForZoom(zoom) > maxResolution) {
            for (var i=zoom|0, ii=resolutions.length; i<ii; ++i) {
                if (resolutions[i] <= maxResolution) {
                    zoom = i;
                    break;
                }
            }
        }
        return zoom;
    },

    /**
     * Method: moveTo
     *
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     * zoom - {Integer}
     * options - {Object}
     */
    moveTo: function(lonlat, zoom, options) {
        if (lonlat != null && !(lonlat instanceof OpenLayers.LonLat)) {
            lonlat = new OpenLayers.LonLat(lonlat);
        }
        if (!options) { 
            options = {};
        }
        if (zoom != null) {
            zoom = parseFloat(zoom);
            if (!this.fractionalZoom) {
                zoom = Math.round(zoom);
            }
        }
        if (this.baseLayer.wrapDateLine) {
            var requestedZoom = zoom;
            zoom = this.adjustZoom(zoom);
            if (zoom !== requestedZoom) {
                // zoom was adjusted, so keep old lonlat to avoid panning
                lonlat = this.getCenter();
            }
        }
        // dragging is false by default
        var dragging = options.dragging || this.dragging;
        // forceZoomChange is false by default
        var forceZoomChange = options.forceZoomChange;

        if (!this.getCachedCenter() && !this.isValidLonLat(lonlat)) {
            lonlat = this.maxExtent.getCenterLonLat();
            this.center = lonlat.clone();
        }

        if(this.restrictedExtent != null) {
            // In 3.0, decide if we want to change interpretation of maxExtent.
            if(lonlat == null) { 
                lonlat = this.center; 
            }
            if(zoom == null) { 
                zoom = this.getZoom(); 
            }
            var resolution = this.getResolutionForZoom(zoom);
            var extent = this.calculateBounds(lonlat, resolution); 
            if(!this.restrictedExtent.containsBounds(extent)) {
                var maxCenter = this.restrictedExtent.getCenterLonLat(); 
                if(extent.getWidth() > this.restrictedExtent.getWidth()) { 
                    lonlat = new OpenLayers.LonLat(maxCenter.lon, lonlat.lat); 
                } else if(extent.left < this.restrictedExtent.left) {
                    lonlat = lonlat.add(this.restrictedExtent.left -
                                        extent.left, 0); 
                } else if(extent.right > this.restrictedExtent.right) { 
                    lonlat = lonlat.add(this.restrictedExtent.right -
                                        extent.right, 0); 
                } 
                if(extent.getHeight() > this.restrictedExtent.getHeight()) { 
                    lonlat = new OpenLayers.LonLat(lonlat.lon, maxCenter.lat); 
                } else if(extent.bottom < this.restrictedExtent.bottom) { 
                    lonlat = lonlat.add(0, this.restrictedExtent.bottom -
                                        extent.bottom); 
                } 
                else if(extent.top > this.restrictedExtent.top) { 
                    lonlat = lonlat.add(0, this.restrictedExtent.top -
                                        extent.top); 
                } 
            }
        }
        
        var zoomChanged = forceZoomChange || (
                            (this.isValidZoomLevel(zoom)) && 
                            (zoom != this.getZoom()) );

        var centerChanged = (this.isValidLonLat(lonlat)) && 
                            (!lonlat.equals(this.center));

        // if neither center nor zoom will change, no need to do anything
        if (zoomChanged || centerChanged || dragging) {
            dragging || this.events.triggerEvent("movestart");

            if (centerChanged) {
                if (!zoomChanged && this.center) { 
                    // if zoom hasnt changed, just slide layerContainer
                    //  (must be done before setting this.center to new value)
                    this.centerLayerContainer(lonlat);
                }
                this.center = lonlat.clone();
            }

            var res = zoomChanged ?
                this.getResolutionForZoom(zoom) : this.getResolution();
            // (re)set the layerContainerDiv's location
            if (zoomChanged || this.layerContainerOrigin == null) {
                this.layerContainerOrigin = this.getCachedCenter();
                this.layerContainerDiv.style.left = "0px";
                this.layerContainerDiv.style.top  = "0px";
                var maxExtent = this.getMaxExtent({restricted: true});
                var maxExtentCenter = maxExtent.getCenterLonLat();
                var lonDelta = this.center.lon - maxExtentCenter.lon;
                var latDelta = maxExtentCenter.lat - this.center.lat;
                var extentWidth = Math.round(maxExtent.getWidth() / res);
                var extentHeight = Math.round(maxExtent.getHeight() / res);
                this.minPx = {
                    x: (this.size.w - extentWidth) / 2 - lonDelta / res,
                    y: (this.size.h - extentHeight) / 2 - latDelta / res
                };
                this.maxPx = {
                    x: this.minPx.x + Math.round(maxExtent.getWidth() / res),
                    y: this.minPx.y + Math.round(maxExtent.getHeight() / res)
                };
            }

            if (zoomChanged) {
                this.zoom = zoom;
                this.resolution = res;
            }    
            
            var bounds = this.getExtent();
            
            //send the move call to the baselayer and all the overlays    

            if(this.baseLayer.visibility) {
                this.baseLayer.moveTo(bounds, zoomChanged, options.dragging);
                options.dragging || this.baseLayer.events.triggerEvent(
                    "moveend", {zoomChanged: zoomChanged}
                );
            }
            
            bounds = this.baseLayer.getExtent();
            
            for (var i=this.layers.length-1; i>=0; --i) {
                var layer = this.layers[i];
                if (layer !== this.baseLayer && !layer.isBaseLayer) {
                    var inRange = layer.calculateInRange();
                    if (layer.inRange != inRange) {
                        // the inRange property has changed. If the layer is
                        // no longer in range, we turn it off right away. If
                        // the layer is no longer out of range, the moveTo
                        // call below will turn on the layer.
                        layer.inRange = inRange;
                        if (!inRange) {
                            layer.display(false);
                        }
                        this.events.triggerEvent("changelayer", {
                            layer: layer, property: "visibility"
                        });
                    }
                    if (inRange && layer.visibility) {
                        layer.moveTo(bounds, zoomChanged, options.dragging);
                        options.dragging || layer.events.triggerEvent(
                            "moveend", {zoomChanged: zoomChanged}
                        );
                    }
                }                
            }
            
            this.events.triggerEvent("move");
            dragging || this.events.triggerEvent("moveend");

            if (zoomChanged) {
                //redraw popups
                for (var i=0, len=this.popups.length; i<len; i++) {
                    this.popups[i].updatePosition();
                }
                this.events.triggerEvent("zoomend");
            }
        }
    },

    /** 
     * Method: centerLayerContainer
     * This function takes care to recenter the layerContainerDiv.
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     */
    centerLayerContainer: function (lonlat) {
        var originPx = this.getViewPortPxFromLonLat(this.layerContainerOrigin);
        var newPx = this.getViewPortPxFromLonLat(lonlat);

        if ((originPx != null) && (newPx != null)) {
            var oldLeft = parseInt(this.layerContainerDiv.style.left);
            var oldTop = parseInt(this.layerContainerDiv.style.top);
            var newLeft = Math.round(originPx.x - newPx.x);
            var newTop = Math.round(originPx.y - newPx.y);
            this.layerContainerDiv.style.left = newLeft + "px";
            this.layerContainerDiv.style.top  = newTop + "px";
            var dx = oldLeft - newLeft;
            var dy = oldTop - newTop;
            this.minPx.x -= dx;
            this.maxPx.x -= dx;
            this.minPx.y -= dy;
            this.maxPx.y -= dy;
        }        
    },

    /**
     * Method: isValidZoomLevel
     * 
     * Parameters:
     * zoomLevel - {Integer}
     * 
     * Returns:
     * {Boolean} Whether or not the zoom level passed in is non-null and 
     *           within the min/max range of zoom levels.
     */
    isValidZoomLevel: function(zoomLevel) {
        return ( (zoomLevel != null) &&
                 (zoomLevel >= 0) && 
                 (zoomLevel < this.getNumZoomLevels()) );
    },
    
    /**
     * Method: isValidLonLat
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     * 
     * Returns:
     * {Boolean} Whether or not the lonlat passed in is non-null and within
     *           the maxExtent bounds
     */
    isValidLonLat: function(lonlat) {
        var valid = false;
        if (lonlat != null) {
            var maxExtent = this.getMaxExtent();
            var worldBounds = this.baseLayer.wrapDateLine && maxExtent;
            valid = maxExtent.containsLonLat(lonlat, {worldBounds: worldBounds});
        }
        return valid;
    },

  /********************************************************/
  /*                                                      */
  /*                 Layer Options                        */
  /*                                                      */
  /*    Accessor functions to Layer Options parameters    */
  /*                                                      */
  /********************************************************/
    
    /**
     * APIMethod: getProjection
     * This method returns a string representing the projection. In 
     *     the case of projection support, this will be the srsCode which
     *     is loaded -- otherwise it will simply be the string value that
     *     was passed to the projection at startup.
     *
     * FIXME: In 3.0, we will remove getProjectionObject, and instead
     *     return a Projection object from this function. 
     * 
     * Returns:
     * {String} The Projection string from the base layer or null. 
     */
    getProjection: function() {
        var projection = this.getProjectionObject();
        return projection ? projection.getCode() : null;
    },
    
    /**
     * APIMethod: getProjectionObject
     * Returns the projection obect from the baselayer.
     *
     * Returns:
     * {<OpenLayers.Projection>} The Projection of the base layer.
     */
    getProjectionObject: function() {
        var projection = null;
        if (this.baseLayer != null) {
            projection = this.baseLayer.projection;
        }
        return projection;
    },
    
    /**
     * APIMethod: getMaxResolution
     * 
     * Returns:
     * {String} The Map's Maximum Resolution
     */
    getMaxResolution: function() {
        var maxResolution = null;
        if (this.baseLayer != null) {
            maxResolution = this.baseLayer.maxResolution;
        }
        return maxResolution;
    },
        
    /**
     * APIMethod: getMaxExtent
     *
     * Parameters:
     * options - {Object} 
     * 
     * Allowed Options:
     * restricted - {Boolean} If true, returns restricted extent (if it is 
     *     available.)
     *
     * Returns:
     * {<OpenLayers.Bounds>} The maxExtent property as set on the current 
     *     baselayer, unless the 'restricted' option is set, in which case
     *     the 'restrictedExtent' option from the map is returned (if it
     *     is set).
     */
    getMaxExtent: function (options) {
        var maxExtent = null;
        if(options && options.restricted && this.restrictedExtent){
            maxExtent = this.restrictedExtent;
        } else if (this.baseLayer != null) {
            maxExtent = this.baseLayer.maxExtent;
        }        
        return maxExtent;
    },
    
    /**
     * APIMethod: getNumZoomLevels
     * 
     * Returns:
     * {Integer} The total number of zoom levels that can be displayed by the 
     *           current baseLayer.
     */
    getNumZoomLevels: function() {
        var numZoomLevels = null;
        if (this.baseLayer != null) {
            numZoomLevels = this.baseLayer.numZoomLevels;
        }
        return numZoomLevels;
    },

  /********************************************************/
  /*                                                      */
  /*                 Baselayer Functions                  */
  /*                                                      */
  /*    The following functions, all publicly exposed     */
  /*       in the API?, are all merely wrappers to the    */
  /*       the same calls on whatever layer is set as     */
  /*                the current base layer                */
  /*                                                      */
  /********************************************************/

    /**
     * APIMethod: getExtent
     * 
     * Returns:
     * {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat 
     *                       bounds of the current viewPort. 
     *                       If no baselayer is set, returns null.
     */
    getExtent: function () {
        var extent = null;
        if (this.baseLayer != null) {
            extent = this.baseLayer.getExtent();
        }
        return extent;
    },

    /**
     * APIMethod: getResolution
     * 
     * Returns:
     * {Float} The current resolution of the map. 
     *         If no baselayer is set, returns null.
     */
    getResolution: function () {
        var resolution = null;
        if (this.baseLayer != null) {
            resolution = this.baseLayer.getResolution();
        } else if(this.allOverlays === true && this.layers.length > 0) {
            // while adding the 1st layer to the map in allOverlays mode,
            // this.baseLayer is not set yet when we need the resolution
            // for calculateInRange.
            resolution = this.layers[0].getResolution();
        }
        return resolution;
    },

    /**
     * APIMethod: getUnits
     * 
     * Returns:
     * {Float} The current units of the map. 
     *         If no baselayer is set, returns null.
     */
    getUnits: function () {
        var units = null;
        if (this.baseLayer != null) {
            units = this.baseLayer.units;
        }
        return units;
    },

     /**
      * APIMethod: getScale
      * 
      * Returns:
      * {Float} The current scale denominator of the map. 
      *         If no baselayer is set, returns null.
      */
    getScale: function () {
        var scale = null;
        if (this.baseLayer != null) {
            var res = this.getResolution();
            var units = this.baseLayer.units;
            scale = OpenLayers.Util.getScaleFromResolution(res, units);
        }
        return scale;
    },


    /**
     * APIMethod: getZoomForExtent
     * 
     * Parameters: 
     * bounds - {<OpenLayers.Bounds>}
     * closest - {Boolean} Find the zoom level that most closely fits the 
     *     specified bounds. Note that this may result in a zoom that does 
     *     not exactly contain the entire extent.
     *     Default is false.
     * 
     * Returns:
     * {Integer} A suitable zoom level for the specified bounds.
     *           If no baselayer is set, returns null.
     */
    getZoomForExtent: function (bounds, closest) {
        var zoom = null;
        if (this.baseLayer != null) {
            zoom = this.baseLayer.getZoomForExtent(bounds, closest);
        }
        return zoom;
    },

    /**
     * APIMethod: getResolutionForZoom
     * 
     * Parameters:
     * zoom - {Float}
     * 
     * Returns:
     * {Float} A suitable resolution for the specified zoom.  If no baselayer
     *     is set, returns null.
     */
    getResolutionForZoom: function(zoom) {
        var resolution = null;
        if(this.baseLayer) {
            resolution = this.baseLayer.getResolutionForZoom(zoom);
        }
        return resolution;
    },

    /**
     * APIMethod: getZoomForResolution
     * 
     * Parameters:
     * resolution - {Float}
     * closest - {Boolean} Find the zoom level that corresponds to the absolute 
     *     closest resolution, which may result in a zoom whose corresponding
     *     resolution is actually smaller than we would have desired (if this
     *     is being called from a getZoomForExtent() call, then this means that
     *     the returned zoom index might not actually contain the entire 
     *     extent specified... but it'll be close).
     *     Default is false.
     * 
     * Returns:
     * {Integer} A suitable zoom level for the specified resolution.
     *           If no baselayer is set, returns null.
     */
    getZoomForResolution: function(resolution, closest) {
        var zoom = null;
        if (this.baseLayer != null) {
            zoom = this.baseLayer.getZoomForResolution(resolution, closest);
        }
        return zoom;
    },

  /********************************************************/
  /*                                                      */
  /*                  Zooming Functions                   */
  /*                                                      */
  /*    The following functions, all publicly exposed     */
  /*       in the API, are all merely wrappers to the     */
  /*               the setCenter() function               */
  /*                                                      */
  /********************************************************/
  
    /** 
     * APIMethod: zoomTo
     * Zoom to a specific zoom level
     * 
     * Parameters:
     * zoom - {Integer}
     */
    zoomTo: function(zoom) {
        if (this.isValidZoomLevel(zoom)) {
            this.setCenter(null, zoom);
        }
    },
    
    /**
     * APIMethod: zoomIn
     * 
     */
    zoomIn: function() {
        this.zoomTo(this.getZoom() + 1);
    },
    
    /**
     * APIMethod: zoomOut
     * 
     */
    zoomOut: function() {
        this.zoomTo(this.getZoom() - 1);
    },

    /**
     * APIMethod: zoomToExtent
     * Zoom to the passed in bounds, recenter
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>|Array} If provided as an array, the array
     *     should consist of four values (left, bottom, right, top).
     * closest - {Boolean} Find the zoom level that most closely fits the 
     *     specified bounds. Note that this may result in a zoom that does 
     *     not exactly contain the entire extent.
     *     Default is false.
     * 
     */
    zoomToExtent: function(bounds, closest) {
        if (!(bounds instanceof OpenLayers.Bounds)) {
            bounds = new OpenLayers.Bounds(bounds);
        }
        var center = bounds.getCenterLonLat();
        if (this.baseLayer.wrapDateLine) {
            var maxExtent = this.getMaxExtent();

            //fix straddling bounds (in the case of a bbox that straddles the 
            // dateline, it's left and right boundaries will appear backwards. 
            // we fix this by allowing a right value that is greater than the
            // max value at the dateline -- this allows us to pass a valid 
            // bounds to calculate zoom)
            //
            bounds = bounds.clone();
            while (bounds.right < bounds.left) {
                bounds.right += maxExtent.getWidth();
            }
            //if the bounds was straddling (see above), then the center point 
            // we got from it was wrong. So we take our new bounds and ask it
            // for the center.
            //
            center = bounds.getCenterLonLat().wrapDateLine(maxExtent);
        }
        this.setCenter(center, this.getZoomForExtent(bounds, closest));
    },

    /** 
     * APIMethod: zoomToMaxExtent
     * Zoom to the full extent and recenter.
     *
     * Parameters:
     * options - {Object}
     * 
     * Allowed Options:
     * restricted - {Boolean} True to zoom to restricted extent if it is 
     *     set. Defaults to true.
     */
    zoomToMaxExtent: function(options) {
        //restricted is true by default
        var restricted = (options) ? options.restricted : true;

        var maxExtent = this.getMaxExtent({
            'restricted': restricted 
        });
        this.zoomToExtent(maxExtent);
    },

    /** 
     * APIMethod: zoomToScale
     * Zoom to a specified scale 
     * 
     * Parameters:
     * scale - {float}
     * closest - {Boolean} Find the zoom level that most closely fits the 
     *     specified scale. Note that this may result in a zoom that does 
     *     not exactly contain the entire extent.
     *     Default is false.
     * 
     */
    zoomToScale: function(scale, closest) {
        var res = OpenLayers.Util.getResolutionFromScale(scale, 
                                                         this.baseLayer.units);

        var halfWDeg = (this.size.w * res) / 2;
        var halfHDeg = (this.size.h * res) / 2;
        var center = this.getCachedCenter();

        var extent = new OpenLayers.Bounds(center.lon - halfWDeg,
                                           center.lat - halfHDeg,
                                           center.lon + halfWDeg,
                                           center.lat + halfHDeg);
        this.zoomToExtent(extent, closest);
    },
    
  /********************************************************/
  /*                                                      */
  /*             Translation Functions                    */
  /*                                                      */
  /*      The following functions translate between       */
  /*           LonLat, LayerPx, and ViewPortPx            */
  /*                                                      */
  /********************************************************/
      
  //
  // TRANSLATION: LonLat <-> ViewPortPx
  //

    /**
     * Method: getLonLatFromViewPortPx
     * 
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
     *                                          an object with a 'x'
     *                                          and 'y' properties.
     * 
     * Returns:
     * {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in view 
     *                       port <OpenLayers.Pixel>, translated into lon/lat
     *                       by the current base layer.
     */
    getLonLatFromViewPortPx: function (viewPortPx) {
        var lonlat = null; 
        if (this.baseLayer != null) {
            lonlat = this.baseLayer.getLonLatFromViewPortPx(viewPortPx);
        }
        return lonlat;
    },

    /**
     * APIMethod: getViewPortPxFromLonLat
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     * 
     * Returns:
     * {<OpenLayers.Pixel>} An OpenLayers.Pixel which is the passed-in 
     *                      <OpenLayers.LonLat>, translated into view port 
     *                      pixels by the current base layer.
     */
    getViewPortPxFromLonLat: function (lonlat) {
        var px = null; 
        if (this.baseLayer != null) {
            px = this.baseLayer.getViewPortPxFromLonLat(lonlat);
        }
        return px;
    },

    
  //
  // CONVENIENCE TRANSLATION FUNCTIONS FOR API
  //

    /**
     * APIMethod: getLonLatFromPixel
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
     *                                  a 'x' and 'y' properties.
     *
     * Returns:
     * {<OpenLayers.LonLat>} An OpenLayers.LonLat corresponding to the given
     *                       OpenLayers.Pixel, translated into lon/lat by the 
     *                       current base layer
     */
    getLonLatFromPixel: function (px) {
        return this.getLonLatFromViewPortPx(px);
    },

    /**
     * APIMethod: getPixelFromLonLat
     * Returns a pixel location given a map location.  The map location is
     *     translated to an integer pixel location (in viewport pixel
     *     coordinates) by the current base layer.
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>} A map location.
     * 
     * Returns: 
     * {<OpenLayers.Pixel>} An OpenLayers.Pixel corresponding to the 
     *     <OpenLayers.LonLat> translated into view port pixels by the current
     *     base layer.
     */
    getPixelFromLonLat: function (lonlat) {
        var px = this.getViewPortPxFromLonLat(lonlat);
        px.x = Math.round(px.x);
        px.y = Math.round(px.y);
        return px;
    },
    
    /**
     * Method: getGeodesicPixelSize
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>} The pixel to get the geodesic length for. If
     *     not provided, the center pixel of the map viewport will be used.
     * 
     * Returns:
     * {<OpenLayers.Size>} The geodesic size of the pixel in kilometers.
     */
    getGeodesicPixelSize: function(px) {
        var lonlat = px ? this.getLonLatFromPixel(px) : (
            this.getCachedCenter() || new OpenLayers.LonLat(0, 0));
        var res = this.getResolution();
        var left = lonlat.add(-res / 2, 0);
        var right = lonlat.add(res / 2, 0);
        var bottom = lonlat.add(0, -res / 2);
        var top = lonlat.add(0, res / 2);
        var dest = new OpenLayers.Projection("EPSG:4326");
        var source = this.getProjectionObject() || dest;
        if(!source.equals(dest)) {
            left.transform(source, dest);
            right.transform(source, dest);
            bottom.transform(source, dest);
            top.transform(source, dest);
        }
        
        return new OpenLayers.Size(
            OpenLayers.Util.distVincenty(left, right),
            OpenLayers.Util.distVincenty(bottom, top)
        );
    },



  //
  // TRANSLATION: ViewPortPx <-> LayerPx
  //

    /**
     * APIMethod: getViewPortPxFromLayerPx
     * 
     * Parameters:
     * layerPx - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {<OpenLayers.Pixel>} Layer Pixel translated into ViewPort Pixel 
     *                      coordinates
     */
    getViewPortPxFromLayerPx:function(layerPx) {
        var viewPortPx = null;
        if (layerPx != null) {
            var dX = parseInt(this.layerContainerDiv.style.left);
            var dY = parseInt(this.layerContainerDiv.style.top);
            viewPortPx = layerPx.add(dX, dY);            
        }
        return viewPortPx;
    },
    
    /**
     * APIMethod: getLayerPxFromViewPortPx
     * 
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {<OpenLayers.Pixel>} ViewPort Pixel translated into Layer Pixel 
     *                      coordinates
     */
    getLayerPxFromViewPortPx:function(viewPortPx) {
        var layerPx = null;
        if (viewPortPx != null) {
            var dX = -parseInt(this.layerContainerDiv.style.left);
            var dY = -parseInt(this.layerContainerDiv.style.top);
            layerPx = viewPortPx.add(dX, dY);
            if (isNaN(layerPx.x) || isNaN(layerPx.y)) {
                layerPx = null;
            }
        }
        return layerPx;
    },
    
  //
  // TRANSLATION: LonLat <-> LayerPx
  //

    /**
     * Method: getLonLatFromLayerPx
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     *
     * Returns:
     * {<OpenLayers.LonLat>}
     */
    getLonLatFromLayerPx: function (px) {
       //adjust for displacement of layerContainerDiv
       px = this.getViewPortPxFromLayerPx(px);
       return this.getLonLatFromViewPortPx(px);         
    },
    
    /**
     * APIMethod: getLayerPxFromLonLat
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>} lonlat
     *
     * Returns:
     * {<OpenLayers.Pixel>} An OpenLayers.Pixel which is the passed-in 
     *                      <OpenLayers.LonLat>, translated into layer pixels 
     *                      by the current base layer
     */
    getLayerPxFromLonLat: function (lonlat) {
       //adjust for displacement of layerContainerDiv
       var px = this.getPixelFromLonLat(lonlat);
       return this.getLayerPxFromViewPortPx(px);         
    },

    CLASS_NAME: "OpenLayers.Map"
});

/**
 * Constant: TILE_WIDTH
 * {Integer} 256 Default tile width (unless otherwise specified)
 */
OpenLayers.Map.TILE_WIDTH = 256;
/**
 * Constant: TILE_HEIGHT
 * {Integer} 256 Default tile height (unless otherwise specified)
 */
OpenLayers.Map.TILE_HEIGHT = 256;
/* ======================================================================
    OpenLayers/Layer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Map.js
 * @requires OpenLayers/Projection.js
 */

/**
 * Class: OpenLayers.Layer
 */
OpenLayers.Layer = OpenLayers.Class({

    /**
     * APIProperty: id
     * {String}
     */
    id: null,

    /** 
     * APIProperty: name
     * {String}
     */
    name: null,

    /** 
     * APIProperty: div
     * {DOMElement}
     */
    div: null,

    /**
     * APIProperty: opacity
     * {Float} The layer's opacity. Float number between 0.0 and 1.0. Default
     * is 1.
     */
    opacity: 1,

    /**
     * APIProperty: alwaysInRange
     * {Boolean} If a layer's display should not be scale-based, this should 
     *     be set to true. This will cause the layer, as an overlay, to always 
     *     be 'active', by always returning true from the calculateInRange() 
     *     function. 
     * 
     *     If not explicitly specified for a layer, its value will be 
     *     determined on startup in initResolutions() based on whether or not 
     *     any scale-specific properties have been set as options on the 
     *     layer. If no scale-specific options have been set on the layer, we 
     *     assume that it should always be in range.
     * 
     *     See #987 for more info.
     */
    alwaysInRange: null,   

    /**
     * Constant: RESOLUTION_PROPERTIES
     * {Array} The properties that are used for calculating resolutions
     *     information.
     */
    RESOLUTION_PROPERTIES: [
        'scales', 'resolutions',
        'maxScale', 'minScale',
        'maxResolution', 'minResolution',
        'numZoomLevels', 'maxZoomLevel'
    ],

    /**
     * APIProperty: events
     * {<OpenLayers.Events>}
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * layer.events.register(type, obj, listener);
     * (end)
     *
     * Listeners will be called with a reference to an event object.  The
     *     properties of this event depends on exactly what happened.
     *
     * All event objects have at least the following properties:
     * object - {Object} A reference to layer.events.object.
     * element - {DOMElement} A reference to layer.events.element.
     *
     * Supported map event types:
     * loadstart - Triggered when layer loading starts.
     * loadend - Triggered when layer loading ends.
     * visibilitychanged - Triggered when layer visibility is changed.
     * move - Triggered when layer moves (triggered with every mousemove
     *     during a drag).
     * moveend - Triggered when layer is done moving, object passed as
     *     argument has a zoomChanged boolean property which tells that the
     *     zoom has changed.
     * added - Triggered after the layer is added to a map.  Listeners will
     *     receive an object with a *map* property referencing the map and a
     *     *layer* property referencing the layer.
     * removed - Triggered after the layer is removed from the map.  Listeners
     *     will receive an object with a *map* property referencing the map and
     *     a *layer* property referencing the layer.
     */
    events: null,

    /**
     * APIProperty: map
     * {<OpenLayers.Map>} This variable is set when the layer is added to 
     *     the map, via the accessor function setMap().
     */
    map: null,
    
    /**
     * APIProperty: isBaseLayer
     * {Boolean} Whether or not the layer is a base layer. This should be set 
     *     individually by all subclasses. Default is false
     */
    isBaseLayer: false,
 
    /**
     * Property: alpha
     * {Boolean} The layer's images have an alpha channel.  Default is false. 
     */
    alpha: false,

    /** 
     * APIProperty: displayInLayerSwitcher
     * {Boolean} Display the layer's name in the layer switcher.  Default is
     *     true.
     */
    displayInLayerSwitcher: true,

    /**
     * APIProperty: visibility
     * {Boolean} The layer should be displayed in the map.  Default is true.
     */
    visibility: true,

    /**
     * APIProperty: attribution
     * {String} Attribution string, displayed when an 
     *     <OpenLayers.Control.Attribution> has been added to the map.
     */
    attribution: null, 

    /** 
     * Property: inRange
     * {Boolean} The current map resolution is within the layer's min/max 
     *     range. This is set in <OpenLayers.Map.setCenter> whenever the zoom 
     *     changes.
     */
    inRange: false,
    
    /**
     * Propery: imageSize
     * {<OpenLayers.Size>} For layers with a gutter, the image is larger than 
     *     the tile by twice the gutter in each dimension.
     */
    imageSize: null,
    
  // OPTIONS

    /** 
     * Property: options
     * {Object} An optional object whose properties will be set on the layer.
     *     Any of the layer properties can be set as a property of the options
     *     object and sent to the constructor when the layer is created.
     */
    options: null,

    /**
     * APIProperty: eventListeners
     * {Object} If set as an option at construction, the eventListeners
     *     object will be registered with <OpenLayers.Events.on>.  Object
     *     structure must be a listeners object as shown in the example for
     *     the events.on method.
     */
    eventListeners: null,

    /**
     * APIProperty: gutter
     * {Integer} Determines the width (in pixels) of the gutter around image
     *     tiles to ignore.  By setting this property to a non-zero value,
     *     images will be requested that are wider and taller than the tile
     *     size by a value of 2 x gutter.  This allows artifacts of rendering
     *     at tile edges to be ignored.  Set a gutter value that is equal to
     *     half the size of the widest symbol that needs to be displayed.
     *     Defaults to zero.  Non-tiled layers always have zero gutter.
     */ 
    gutter: 0, 

    /**
     * APIProperty: projection
     * {<OpenLayers.Projection>} or {<String>} Specifies the projection of the layer.
     *     Can be set in the layer options. If not specified in the layer options,
     *     it is set to the default projection specified in the map,
     *     when the layer is added to the map.
     *     Projection along with default maxExtent and resolutions
     *     are set automatically with commercial baselayers in EPSG:3857,
     *     such as Google, Bing and OpenStreetMap, and do not need to be specified.
     *     Otherwise, if specifying projection, also set maxExtent,
     *     maxResolution or resolutions as appropriate.
     *     When using vector layers with strategies, layer projection should be set
     *     to the projection of the source data if that is different from the map default.
     * 
     *     Can be either a string or an <OpenLayers.Projection> object;
     *     if a string is passed, will be converted to an object when
     *     the layer is added to the map.
     * 
     */
    projection: null,    
    
    /**
     * APIProperty: units
     * {String} The layer map units.  Defaults to null.  Possible values
     *     are 'degrees' (or 'dd'), 'm', 'ft', 'km', 'mi', 'inches'.
     *     Normally taken from the projection.
     *     Only required if both map and layers do not define a projection,
     *     or if they define a projection which does not define units.
     */
    units: null,

    /**
     * APIProperty: scales
     * {Array}  An array of map scales in descending order.  The values in the
     *     array correspond to the map scale denominator.  Note that these
     *     values only make sense if the display (monitor) resolution of the
     *     client is correctly guessed by whomever is configuring the
     *     application.  In addition, the units property must also be set.
     *     Use <resolutions> instead wherever possible.
     */
    scales: null,

    /**
     * APIProperty: resolutions
     * {Array} A list of map resolutions (map units per pixel) in descending
     *     order.  If this is not set in the layer constructor, it will be set
     *     based on other resolution related properties (maxExtent,
     *     maxResolution, maxScale, etc.).
     */
    resolutions: null,
    
    /**
     * APIProperty: maxExtent
     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
     *     should consist of four values (left, bottom, right, top).
     *     The maximum extent for the layer.  Defaults to null.
     * 
     *     The center of these bounds will not stray outside
     *     of the viewport extent during panning.  In addition, if
     *     <displayOutsideMaxExtent> is set to false, data will not be
     *     requested that falls completely outside of these bounds.
     */
    maxExtent: null,
    
    /**
     * APIProperty: minExtent
     * {<OpenLayers.Bounds>|Array} If provided as an array, the array
     *     should consist of four values (left, bottom, right, top).
     *     The minimum extent for the layer.  Defaults to null.
     */
    minExtent: null,
    
    /**
     * APIProperty: maxResolution
     * {Float} Default max is 360 deg / 256 px, which corresponds to
     *     zoom level 0 on gmaps.  Specify a different value in the layer 
     *     options if you are not using the default <OpenLayers.Map.tileSize>
     *     and displaying the whole world.
     */
    maxResolution: null,

    /**
     * APIProperty: minResolution
     * {Float}
     */
    minResolution: null,

    /**
     * APIProperty: numZoomLevels
     * {Integer}
     */
    numZoomLevels: null,
    
    /**
     * APIProperty: minScale
     * {Float}
     */
    minScale: null,
    
    /**
     * APIProperty: maxScale
     * {Float}
     */
    maxScale: null,

    /**
     * APIProperty: displayOutsideMaxExtent
     * {Boolean} Request map tiles that are completely outside of the max 
     *     extent for this layer. Defaults to false.
     */
    displayOutsideMaxExtent: false,

    /**
     * APIProperty: wrapDateLine
     * {Boolean} Wraps the world at the international dateline, so the map can
     * be panned infinitely in longitudinal direction. Only use this on the
     * base layer, and only if the layer's maxExtent equals the world bounds.
     * #487 for more info.   
     */
    wrapDateLine: false,
    
    /**
     * Property: metadata
     * {Object} This object can be used to store additional information on a
     *     layer object.
     */
    metadata: null,
    
    /**
     * Constructor: OpenLayers.Layer
     *
     * Parameters:
     * name - {String} The layer name
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, options) {

        this.metadata = {};
        
        this.addOptions(options);

        this.name = name;
        
        if (this.id == null) {

            this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");

            this.div = OpenLayers.Util.createDiv(this.id);
            this.div.style.width = "100%";
            this.div.style.height = "100%";
            this.div.dir = "ltr";

            this.events = new OpenLayers.Events(this, this.div);
            if(this.eventListeners instanceof Object) {
                this.events.on(this.eventListeners);
            }

        }
    },
    
    /**
     * Method: destroy
     * Destroy is a destructor: this is to alleviate cyclic references which
     *     the Javascript garbage cleaner can not take care of on its own.
     *
     * Parameters:
     * setNewBaseLayer - {Boolean} Set a new base layer when this layer has
     *     been destroyed.  Default is true.
     */
    destroy: function(setNewBaseLayer) {
        if (setNewBaseLayer == null) {
            setNewBaseLayer = true;
        }
        if (this.map != null) {
            this.map.removeLayer(this, setNewBaseLayer);
        }
        this.projection = null;
        this.map = null;
        this.name = null;
        this.div = null;
        this.options = null;

        if (this.events) {
            if(this.eventListeners) {
                this.events.un(this.eventListeners);
            }
            this.events.destroy();
        }
        this.eventListeners = null;
        this.events = null;
    },
    
   /**
    * Method: clone
    *
    * Parameters:
    * obj - {<OpenLayers.Layer>} The layer to be cloned
    *
    * Returns:
    * {<OpenLayers.Layer>} An exact clone of this <OpenLayers.Layer>
    */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer(this.name, this.getOptions());
        }
        
        // catch any randomly tagged-on properties
        OpenLayers.Util.applyDefaults(obj, this);
        
        // a cloned layer should never have its map property set
        //  because it has not been added to a map yet. 
        obj.map = null;
        
        return obj;
    },
    
    /**
     * Method: getOptions
     * Extracts an object from the layer with the properties that were set as
     *     options, but updates them with the values currently set on the
     *     instance.
     * 
     * Returns:
     * {Object} the <options> of the layer, representing the current state.
     */
    getOptions: function() {
        var options = {};
        for(var o in this.options) {
            options[o] = this[o];
        }
        return options;
    },
    
    /** 
     * APIMethod: setName
     * Sets the new layer name for this layer.  Can trigger a changelayer event
     *     on the map.
     *
     * Parameters:
     * newName - {String} The new name.
     */
    setName: function(newName) {
        if (newName != this.name) {
            this.name = newName;
            if (this.map != null) {
                this.map.events.triggerEvent("changelayer", {
                    layer: this,
                    property: "name"
                });
            }
        }
    },    
    
   /**
    * APIMethod: addOptions
    * 
    * Parameters:
    * newOptions - {Object}
    * reinitialize - {Boolean} If set to true, and if resolution options of the
    *     current baseLayer were changed, the map will be recentered to make
    *     sure that it is displayed with a valid resolution, and a
    *     changebaselayer event will be triggered.
    */
    addOptions: function (newOptions, reinitialize) {

        if (this.options == null) {
            this.options = {};
        }
        
        if (newOptions) {
            // make sure this.projection references a projection object
            if(typeof newOptions.projection == "string") {
                newOptions.projection = new OpenLayers.Projection(newOptions.projection);
            }
            if (newOptions.projection) {
                // get maxResolution, units and maxExtent from projection defaults if
                // they are not defined already
                OpenLayers.Util.applyDefaults(newOptions,
                    OpenLayers.Projection.defaults[newOptions.projection.getCode()]);
            }
            // allow array for extents
            if (newOptions.maxExtent && !(newOptions.maxExtent instanceof OpenLayers.Bounds)) {
                newOptions.maxExtent = new OpenLayers.Bounds(newOptions.maxExtent);
            }
            if (newOptions.minExtent && !(newOptions.minExtent instanceof OpenLayers.Bounds)) {
                newOptions.minExtent = new OpenLayers.Bounds(newOptions.minExtent);
            }
        }

        // update our copy for clone
        OpenLayers.Util.extend(this.options, newOptions);

        // add new options to this
        OpenLayers.Util.extend(this, newOptions);
        
        // get the units from the projection, if we have a projection
        // and it it has units
        if(this.projection && this.projection.getUnits()) {
            this.units = this.projection.getUnits();
        }

        // re-initialize resolutions if necessary, i.e. if any of the
        // properties of the "properties" array defined below is set
        // in the new options
        if(this.map) {
            // store current resolution so we can try to restore it later
            var resolution = this.map.getResolution();
            var properties = this.RESOLUTION_PROPERTIES.concat(
                ["projection", "units", "minExtent", "maxExtent"]
            );
            for(var o in newOptions) {
                if(newOptions.hasOwnProperty(o) &&
                   OpenLayers.Util.indexOf(properties, o) >= 0) {

                    this.initResolutions();
                    if (reinitialize && this.map.baseLayer === this) {
                        // update map position, and restore previous resolution
                        this.map.setCenter(this.map.getCenter(),
                            this.map.getZoomForResolution(resolution),
                            false, true
                        );
                        // trigger a changebaselayer event to make sure that
                        // all controls (especially
                        // OpenLayers.Control.PanZoomBar) get notified of the
                        // new options
                        this.map.events.triggerEvent("changebaselayer", {
                            layer: this
                        });
                    }
                    break;
                }
            }
        }
    },

    /**
     * APIMethod: onMapResize
     * This function can be implemented by subclasses
     */
    onMapResize: function() {
        //this function can be implemented by subclasses  
    },

    /**
     * APIMethod: redraw
     * Redraws the layer.  Returns true if the layer was redrawn, false if not.
     *
     * Returns:
     * {Boolean} The layer was redrawn.
     */
    redraw: function() {
        var redrawn = false;
        if (this.map) {

            // min/max Range may have changed
            this.inRange = this.calculateInRange();

            // map's center might not yet be set
            var extent = this.getExtent();

            if (extent && this.inRange && this.visibility) {
                var zoomChanged = true;
                this.moveTo(extent, zoomChanged, false);
                this.events.triggerEvent("moveend",
                    {"zoomChanged": zoomChanged});
                redrawn = true;
            }
        }
        return redrawn;
    },

    /**
     * Method: moveTo
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * zoomChanged - {Boolean} Tells when zoom has changed, as layers have to
     *     do some init work in that case.
     * dragging - {Boolean}
     */
    moveTo:function(bounds, zoomChanged, dragging) {
        var display = this.visibility;
        if (!this.isBaseLayer) {
            display = display && this.inRange;
        }
        this.display(display);
    },

    /**
     * Method: moveByPx
     * Move the layer based on pixel vector. To be implemented by subclasses.
     *
     * Parameters:
     * dx - {Number} The x coord of the displacement vector.
     * dy - {Number} The y coord of the displacement vector.
     */
    moveByPx: function(dx, dy) {
    },

    /**
     * Method: setMap
     * Set the map property for the layer. This is done through an accessor
     *     so that subclasses can override this and take special action once 
     *     they have their map variable set. 
     * 
     *     Here we take care to bring over any of the necessary default 
     *     properties from the map. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        if (this.map == null) {
        
            this.map = map;
            
            // grab some essential layer data from the map if it hasn't already
            //  been set
            this.maxExtent = this.maxExtent || this.map.maxExtent;
            this.minExtent = this.minExtent || this.map.minExtent;

            this.projection = this.projection || this.map.projection;
            if (typeof this.projection == "string") {
                this.projection = new OpenLayers.Projection(this.projection);
            }

            // Check the projection to see if we can get units -- if not, refer
            // to properties.
            this.units = this.projection.getUnits() ||
                         this.units || this.map.units;
            
            this.initResolutions();
            
            if (!this.isBaseLayer) {
                this.inRange = this.calculateInRange();
                var show = ((this.visibility) && (this.inRange));
                this.div.style.display = show ? "" : "none";
            }
            
            // deal with gutters
            this.setTileSize();
        }
    },
    
    /**
     * Method: afterAdd
     * Called at the end of the map.addLayer sequence.  At this point, the map
     *     will have a base layer.  To be overridden by subclasses.
     */
    afterAdd: function() {
    },
    
    /**
     * APIMethod: removeMap
     * Just as setMap() allows each layer the possibility to take a 
     *     personalized action on being added to the map, removeMap() allows
     *     each layer to take a personalized action on being removed from it. 
     *     For now, this will be mostly unused, except for the EventPane layer,
     *     which needs this hook so that it can remove the special invisible
     *     pane. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        //to be overridden by subclasses
    },
    
    /**
     * APIMethod: getImageSize
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} optional tile bounds, can be used
     *     by subclasses that have to deal with different tile sizes at the
     *     layer extent edges (e.g. Zoomify)
     * 
     * Returns:
     * {<OpenLayers.Size>} The size that the image should be, taking into 
     *     account gutters.
     */ 
    getImageSize: function(bounds) { 
        return (this.imageSize || this.tileSize); 
    },    
  
    /**
     * APIMethod: setTileSize
     * Set the tile size based on the map size.  This also sets layer.imageSize
     *     or use by Tile.Image.
     * 
     * Parameters:
     * size - {<OpenLayers.Size>}
     */
    setTileSize: function(size) {
        var tileSize = (size) ? size :
                                ((this.tileSize) ? this.tileSize :
                                                   this.map.getTileSize());
        this.tileSize = tileSize;
        if(this.gutter) {
          // layers with gutters need non-null tile sizes
          //if(tileSize == null) {
          //    OpenLayers.console.error("Error in layer.setMap() for " +
          //                              this.name + ": layers with " +
          //                              "gutters need non-null tile sizes");
          //}
            this.imageSize = new OpenLayers.Size(tileSize.w + (2*this.gutter), 
                                                 tileSize.h + (2*this.gutter)); 
        }
    },

    /**
     * APIMethod: getVisibility
     * 
     * Returns:
     * {Boolean} The layer should be displayed (if in range).
     */
    getVisibility: function() {
        return this.visibility;
    },

    /** 
     * APIMethod: setVisibility
     * Set the visibility flag for the layer and hide/show & redraw 
     *     accordingly. Fire event unless otherwise specified
     * 
     * Note that visibility is no longer simply whether or not the layer's
     *     style.display is set to "block". Now we store a 'visibility' state 
     *     property on the layer class, this allows us to remember whether or 
     *     not we *desire* for a layer to be visible. In the case where the 
     *     map's resolution is out of the layer's range, this desire may be 
     *     subverted.
     * 
     * Parameters:
     * visibility - {Boolean} Whether or not to display the layer (if in range)
     */
    setVisibility: function(visibility) {
        if (visibility != this.visibility) {
            this.visibility = visibility;
            this.display(visibility);
            this.redraw();
            if (this.map != null) {
                this.map.events.triggerEvent("changelayer", {
                    layer: this,
                    property: "visibility"
                });
            }
            this.events.triggerEvent("visibilitychanged");
        }
    },

    /** 
     * APIMethod: display
     * Hide or show the Layer. This is designed to be used internally, and 
     *     is not generally the way to enable or disable the layer. For that,
     *     use the setVisibility function instead..
     * 
     * Parameters:
     * display - {Boolean}
     */
    display: function(display) {
        if (display != (this.div.style.display != "none")) {
            this.div.style.display = (display && this.calculateInRange()) ? "block" : "none";
        }
    },

    /**
     * APIMethod: calculateInRange
     * 
     * Returns:
     * {Boolean} The layer is displayable at the current map's current
     *     resolution. Note that if 'alwaysInRange' is true for the layer, 
     *     this function will always return true.
     */
    calculateInRange: function() {
        var inRange = false;

        if (this.alwaysInRange) {
            inRange = true;
        } else {
            if (this.map) {
                var resolution = this.map.getResolution();
                inRange = ( (resolution >= this.minResolution) &&
                            (resolution <= this.maxResolution) );
            }
        }
        return inRange;
    },

    /** 
     * APIMethod: setIsBaseLayer
     * 
     * Parameters:
     * isBaseLayer - {Boolean}
     */
    setIsBaseLayer: function(isBaseLayer) {
        if (isBaseLayer != this.isBaseLayer) {
            this.isBaseLayer = isBaseLayer;
            if (this.map != null) {
                this.map.events.triggerEvent("changebaselayer", {
                    layer: this
                });
            }
        }
    },

  /********************************************************/
  /*                                                      */
  /*                 Baselayer Functions                  */
  /*                                                      */
  /********************************************************/
  
    /** 
     * Method: initResolutions
     * This method's responsibility is to set up the 'resolutions' array 
     *     for the layer -- this array is what the layer will use to interface
     *     between the zoom levels of the map and the resolution display 
     *     of the layer.
     * 
     * The user has several options that determine how the array is set up.
     *  
     * For a detailed explanation, see the following wiki from the 
     *     openlayers.org homepage:
     *     http://trac.openlayers.org/wiki/SettingZoomLevels
     */
    initResolutions: function() {

        // ok we want resolutions, here's our strategy:
        //
        // 1. if resolutions are defined in the layer config, use them
        // 2. else, if scales are defined in the layer config then derive
        //    resolutions from these scales
        // 3. else, attempt to calculate resolutions from maxResolution,
        //    minResolution, numZoomLevels, maxZoomLevel set in the
        //    layer config
        // 4. if we still don't have resolutions, and if resolutions
        //    are defined in the same, use them
        // 5. else, if scales are defined in the map then derive
        //    resolutions from these scales
        // 6. else, attempt to calculate resolutions from maxResolution,
        //    minResolution, numZoomLevels, maxZoomLevel set in the
        //    map
        // 7. hope for the best!

        var i, len, p;
        var props = {}, alwaysInRange = true;

        // get resolution data from layer config
        // (we also set alwaysInRange in the layer as appropriate)
        for(i=0, len=this.RESOLUTION_PROPERTIES.length; i<len; i++) {
            p = this.RESOLUTION_PROPERTIES[i];
            props[p] = this.options[p];
            if(alwaysInRange && this.options[p]) {
                alwaysInRange = false;
            }
        }
        if(this.alwaysInRange == null) {
            this.alwaysInRange = alwaysInRange;
        }

        // if we don't have resolutions then attempt to derive them from scales
        if(props.resolutions == null) {
            props.resolutions = this.resolutionsFromScales(props.scales);
        }

        // if we still don't have resolutions then attempt to calculate them
        if(props.resolutions == null) {
            props.resolutions = this.calculateResolutions(props);
        }

        // if we couldn't calculate resolutions then we look at we have
        // in the map
        if(props.resolutions == null) {
            for(i=0, len=this.RESOLUTION_PROPERTIES.length; i<len; i++) {
                p = this.RESOLUTION_PROPERTIES[i];
                props[p] = this.options[p] != null ?
                    this.options[p] : this.map[p];
            }
            if(props.resolutions == null) {
                props.resolutions = this.resolutionsFromScales(props.scales);
            }
            if(props.resolutions == null) {
                props.resolutions = this.calculateResolutions(props);
            }
        }

        // ok, we new need to set properties in the instance

        // get maxResolution from the config if it's defined there
        var maxResolution;
        if(this.options.maxResolution &&
           this.options.maxResolution !== "auto") {
            maxResolution = this.options.maxResolution;
        }
        if(this.options.minScale) {
            maxResolution = OpenLayers.Util.getResolutionFromScale(
                this.options.minScale, this.units);
        }

        // get minResolution from the config if it's defined there
        var minResolution;
        if(this.options.minResolution &&
           this.options.minResolution !== "auto") {
            minResolution = this.options.minResolution;
        }
        if(this.options.maxScale) {
            minResolution = OpenLayers.Util.getResolutionFromScale(
                this.options.maxScale, this.units);
        }

        if(props.resolutions) {

            //sort resolutions array descendingly
            props.resolutions.sort(function(a, b) {
                return (b - a);
            });

            // if we still don't have a maxResolution get it from the
            // resolutions array
            if(!maxResolution) {
                maxResolution = props.resolutions[0];
            }

            // if we still don't have a minResolution get it from the
            // resolutions array
            if(!minResolution) {
                var lastIdx = props.resolutions.length - 1;
                minResolution = props.resolutions[lastIdx];
            }
        }

        this.resolutions = props.resolutions;
        if(this.resolutions) {
            len = this.resolutions.length;
            this.scales = new Array(len);
            for(i=0; i<len; i++) {
                this.scales[i] = OpenLayers.Util.getScaleFromResolution(
                    this.resolutions[i], this.units);
            }
            this.numZoomLevels = len;
        }
        this.minResolution = minResolution;
        if(minResolution) {
            this.maxScale = OpenLayers.Util.getScaleFromResolution(
                minResolution, this.units);
        }
        this.maxResolution = maxResolution;
        if(maxResolution) {
            this.minScale = OpenLayers.Util.getScaleFromResolution(
                maxResolution, this.units);
        }
    },

    /**
     * Method: resolutionsFromScales
     * Derive resolutions from scales.
     *
     * Parameters:
     * scales - {Array(Number)} Scales
     *
     * Returns
     * {Array(Number)} Resolutions
     */
    resolutionsFromScales: function(scales) {
        if(scales == null) {
            return;
        }
        var resolutions, i, len;
        len = scales.length;
        resolutions = new Array(len);
        for(i=0; i<len; i++) {
            resolutions[i] = OpenLayers.Util.getResolutionFromScale(
                scales[i], this.units);
        }
        return resolutions;
    },

    /**
     * Method: calculateResolutions
     * Calculate resolutions based on the provided properties.
     *
     * Parameters:
     * props - {Object} Properties
     *
     * Returns:
     * {Array({Number})} Array of resolutions.
     */
    calculateResolutions: function(props) {

        var viewSize, wRes, hRes;

        // determine maxResolution
        var maxResolution = props.maxResolution;
        if(props.minScale != null) {
            maxResolution =
                OpenLayers.Util.getResolutionFromScale(props.minScale,
                                                       this.units);
        } else if(maxResolution == "auto" && this.maxExtent != null) {
            viewSize = this.map.getSize();
            wRes = this.maxExtent.getWidth() / viewSize.w;
            hRes = this.maxExtent.getHeight() / viewSize.h;
            maxResolution = Math.max(wRes, hRes);
        }

        // determine minResolution
        var minResolution = props.minResolution;
        if(props.maxScale != null) {
            minResolution =
                OpenLayers.Util.getResolutionFromScale(props.maxScale,
                                                       this.units);
        } else if(props.minResolution == "auto" && this.minExtent != null) {
            viewSize = this.map.getSize();
            wRes = this.minExtent.getWidth() / viewSize.w;
            hRes = this.minExtent.getHeight()/ viewSize.h;
            minResolution = Math.max(wRes, hRes);
        }

        if(typeof maxResolution !== "number" &&
           typeof minResolution !== "number" &&
           this.maxExtent != null) {
            // maxResolution for default grid sets assumes that at zoom
            // level zero, the whole world fits on one tile.
            var tileSize = this.map.getTileSize();
            maxResolution = Math.max(
                this.maxExtent.getWidth() / tileSize.w,
                this.maxExtent.getHeight() / tileSize.h
            );
        }

        // determine numZoomLevels
        var maxZoomLevel = props.maxZoomLevel;
        var numZoomLevels = props.numZoomLevels;
        if(typeof minResolution === "number" &&
           typeof maxResolution === "number" && numZoomLevels === undefined) {
            var ratio = maxResolution / minResolution;
            numZoomLevels = Math.floor(Math.log(ratio) / Math.log(2)) + 1;
        } else if(numZoomLevels === undefined && maxZoomLevel != null) {
            numZoomLevels = maxZoomLevel + 1;
        }

        // are we able to calculate resolutions?
        if(typeof numZoomLevels !== "number" || numZoomLevels <= 0 ||
           (typeof maxResolution !== "number" &&
                typeof minResolution !== "number")) {
            return;
        }

        // now we have numZoomLevels and at least one of maxResolution
        // or minResolution, we can populate the resolutions array

        var resolutions = new Array(numZoomLevels);
        var base = 2;
        if(typeof minResolution == "number" &&
           typeof maxResolution == "number") {
            // if maxResolution and minResolution are set, we calculate
            // the base for exponential scaling that starts at
            // maxResolution and ends at minResolution in numZoomLevels
            // steps.
            base = Math.pow(
                    (maxResolution / minResolution),
                (1 / (numZoomLevels - 1))
            );
        }

        var i;
        if(typeof maxResolution === "number") {
            for(i=0; i<numZoomLevels; i++) {
                resolutions[i] = maxResolution / Math.pow(base, i);
            }
        } else {
            for(i=0; i<numZoomLevels; i++) {
                resolutions[numZoomLevels - 1 - i] =
                    minResolution * Math.pow(base, i);
            }
        }

        return resolutions;
    },

    /**
     * APIMethod: getResolution
     * 
     * Returns:
     * {Float} The currently selected resolution of the map, taken from the
     *     resolutions array, indexed by current zoom level.
     */
    getResolution: function() {
        var zoom = this.map.getZoom();
        return this.getResolutionForZoom(zoom);
    },

    /** 
     * APIMethod: getExtent
     * 
     * Returns:
     * {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat 
     *     bounds of the current viewPort.
     */
    getExtent: function() {
        // just use stock map calculateBounds function -- passing no arguments
        //  means it will user map's current center & resolution
        //
        return this.map.calculateBounds();
    },

    /**
     * APIMethod: getZoomForExtent
     * 
     * Parameters:
     * extent - {<OpenLayers.Bounds>}
     * closest - {Boolean} Find the zoom level that most closely fits the 
     *     specified bounds. Note that this may result in a zoom that does 
     *     not exactly contain the entire extent.
     *     Default is false.
     *
     * Returns:
     * {Integer} The index of the zoomLevel (entry in the resolutions array) 
     *     for the passed-in extent. We do this by calculating the ideal 
     *     resolution for the given extent (based on the map size) and then 
     *     calling getZoomForResolution(), passing along the 'closest'
     *     parameter.
     */
    getZoomForExtent: function(extent, closest) {
        var viewSize = this.map.getSize();
        var idealResolution = Math.max( extent.getWidth()  / viewSize.w,
                                        extent.getHeight() / viewSize.h );

        return this.getZoomForResolution(idealResolution, closest);
    },
    
    /** 
     * Method: getDataExtent
     * Calculates the max extent which includes all of the data for the layer.
     *     This function is to be implemented by subclasses.
     * 
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getDataExtent: function () {
        //to be implemented by subclasses
    },

    /**
     * APIMethod: getResolutionForZoom
     * 
     * Parameters:
     * zoom - {Float}
     * 
     * Returns:
     * {Float} A suitable resolution for the specified zoom.
     */
    getResolutionForZoom: function(zoom) {
        zoom = Math.max(0, Math.min(zoom, this.resolutions.length - 1));
        var resolution;
        if(this.map.fractionalZoom) {
            var low = Math.floor(zoom);
            var high = Math.ceil(zoom);
            resolution = this.resolutions[low] -
                ((zoom-low) * (this.resolutions[low]-this.resolutions[high]));
        } else {
            resolution = this.resolutions[Math.round(zoom)];
        }
        return resolution;
    },

    /**
     * APIMethod: getZoomForResolution
     * 
     * Parameters:
     * resolution - {Float}
     * closest - {Boolean} Find the zoom level that corresponds to the absolute 
     *     closest resolution, which may result in a zoom whose corresponding
     *     resolution is actually smaller than we would have desired (if this
     *     is being called from a getZoomForExtent() call, then this means that
     *     the returned zoom index might not actually contain the entire 
     *     extent specified... but it'll be close).
     *     Default is false.
     * 
     * Returns:
     * {Integer} The index of the zoomLevel (entry in the resolutions array) 
     *     that corresponds to the best fit resolution given the passed in 
     *     value and the 'closest' specification.
     */
    getZoomForResolution: function(resolution, closest) {
        var zoom, i, len;
        if(this.map.fractionalZoom) {
            var lowZoom = 0;
            var highZoom = this.resolutions.length - 1;
            var highRes = this.resolutions[lowZoom];
            var lowRes = this.resolutions[highZoom];
            var res;
            for(i=0, len=this.resolutions.length; i<len; ++i) {
                res = this.resolutions[i];
                if(res >= resolution) {
                    highRes = res;
                    lowZoom = i;
                }
                if(res <= resolution) {
                    lowRes = res;
                    highZoom = i;
                    break;
                }
            }
            var dRes = highRes - lowRes;
            if(dRes > 0) {
                zoom = lowZoom + ((highRes - resolution) / dRes);
            } else {
                zoom = lowZoom;
            }
        } else {
            var diff;
            var minDiff = Number.POSITIVE_INFINITY;
            for(i=0, len=this.resolutions.length; i<len; i++) {            
                if (closest) {
                    diff = Math.abs(this.resolutions[i] - resolution);
                    if (diff > minDiff) {
                        break;
                    }
                    minDiff = diff;
                } else {
                    if (this.resolutions[i] < resolution) {
                        break;
                    }
                }
            }
            zoom = Math.max(0, i-1);
        }
        return zoom;
    },
    
    /**
     * APIMethod: getLonLatFromViewPortPx
     * 
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
     *                                          an object with a 'x'
     *                                          and 'y' properties.
     *
     * Returns:
     * {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in 
     *     view port <OpenLayers.Pixel>, translated into lon/lat by the layer.
     */
    getLonLatFromViewPortPx: function (viewPortPx) {
        var lonlat = null;
        var map = this.map;
        if (viewPortPx != null && map.minPx) {
            var res = map.getResolution();
            var maxExtent = map.getMaxExtent({restricted: true});
            var lon = (viewPortPx.x - map.minPx.x) * res + maxExtent.left;
            var lat = (map.minPx.y - viewPortPx.y) * res + maxExtent.top;
            lonlat = new OpenLayers.LonLat(lon, lat);

            if (this.wrapDateLine) {
                lonlat = lonlat.wrapDateLine(this.maxExtent);
            }
        }
        return lonlat;
    },

    /**
     * APIMethod: getViewPortPxFromLonLat
     * Returns a pixel location given a map location.  This method will return
     *     fractional pixel values.
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>|Object} An OpenLayers.LonLat or
     *                                       an object with a 'lon'
     *                                       and 'lat' properties.
     *
     * Returns: 
     * {<OpenLayers.Pixel>} An <OpenLayers.Pixel> which is the passed-in 
     *     lonlat translated into view port pixels.
     */
    getViewPortPxFromLonLat: function (lonlat, resolution) {
        var px = null; 
        if (lonlat != null) {
            resolution = resolution || this.map.getResolution();
            var extent = this.map.calculateBounds(null, resolution);
            px = new OpenLayers.Pixel(
                (1/resolution * (lonlat.lon - extent.left)),
                (1/resolution * (extent.top - lonlat.lat))
            );    
        }
        return px;
    },
    
    /**
     * APIMethod: setOpacity
     * Sets the opacity for the entire layer (all images)
     * 
     * Parameters:
     * opacity - {Float}
     */
    setOpacity: function(opacity) {
        if (opacity != this.opacity) {
            this.opacity = opacity;
            var childNodes = this.div.childNodes;
            for(var i = 0, len = childNodes.length; i < len; ++i) {
                var element = childNodes[i].firstChild || childNodes[i];
                var lastChild = childNodes[i].lastChild;
                //TODO de-uglify this
                if (lastChild && lastChild.nodeName.toLowerCase() === "iframe") {
                    element = lastChild.parentNode;
                }
                OpenLayers.Util.modifyDOMElement(element, null, null, null, 
                                                 null, null, null, opacity);
            }
            if (this.map != null) {
                this.map.events.triggerEvent("changelayer", {
                    layer: this,
                    property: "opacity"
                });
            }
        }
    },

    /**
     * Method: getZIndex
     * 
     * Returns: 
     * {Integer} the z-index of this layer
     */    
    getZIndex: function () {
        return this.div.style.zIndex;
    },

    /**
     * Method: setZIndex
     * 
     * Parameters: 
     * zIndex - {Integer}
     */    
    setZIndex: function (zIndex) {
        this.div.style.zIndex = zIndex;
    },

    /**
     * Method: adjustBounds
     * This function will take a bounds, and if wrapDateLine option is set
     *     on the layer, it will return a bounds which is wrapped around the 
     *     world. We do not wrap for bounds which *cross* the 
     *     maxExtent.left/right, only bounds which are entirely to the left 
     *     or entirely to the right.
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     */
    adjustBounds: function (bounds) {

        if (this.gutter) {
            // Adjust the extent of a bounds in map units by the 
            // layer's gutter in pixels.
            var mapGutter = this.gutter * this.map.getResolution();
            bounds = new OpenLayers.Bounds(bounds.left - mapGutter,
                                           bounds.bottom - mapGutter,
                                           bounds.right + mapGutter,
                                           bounds.top + mapGutter);
        }

        if (this.wrapDateLine) {
            // wrap around the date line, within the limits of rounding error
            var wrappingOptions = { 
                'rightTolerance':this.getResolution(),
                'leftTolerance':this.getResolution()
            };    
            bounds = bounds.wrapDateLine(this.maxExtent, wrappingOptions);
                              
        }
        return bounds;
    },

    CLASS_NAME: "OpenLayers.Layer"
});
/* ======================================================================
    OpenLayers/Layer/SphericalMercator.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer.js
 * @requires OpenLayers/Projection.js
 */

/**
 * Class: OpenLayers.Layer.SphericalMercator
 * A mixin for layers that wraps up the pieces neccesary to have a coordinate
 *     conversion for working with commercial APIs which use a spherical
 *     mercator projection.  Using this layer as a base layer, additional
 *     layers can be used as overlays if they are in the same projection.
 *
 * A layer is given properties of this object by setting the sphericalMercator
 *     property to true.
 *
 * More projection information:
 *  - http://spatialreference.org/ref/user/google-projection/
 *
 * Proj4 Text:
 *     +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0
 *     +k=1.0 +units=m +nadgrids=@null +no_defs
 *
 * WKT:
 *     900913=PROJCS["WGS84 / Simple Mercator", GEOGCS["WGS 84",
 *     DATUM["WGS_1984", SPHEROID["WGS_1984", 6378137.0, 298.257223563]], 
 *     PRIMEM["Greenwich", 0.0], UNIT["degree", 0.017453292519943295], 
 *     AXIS["Longitude", EAST], AXIS["Latitude", NORTH]],
 *     PROJECTION["Mercator_1SP_Google"], 
 *     PARAMETER["latitude_of_origin", 0.0], PARAMETER["central_meridian", 0.0], 
 *     PARAMETER["scale_factor", 1.0], PARAMETER["false_easting", 0.0], 
 *     PARAMETER["false_northing", 0.0], UNIT["m", 1.0], AXIS["x", EAST],
 *     AXIS["y", NORTH], AUTHORITY["EPSG","900913"]]
 */
OpenLayers.Layer.SphericalMercator = {

    /**
     * Method: getExtent
     * Get the map's extent.
     *
     * Returns:
     * {<OpenLayers.Bounds>} The map extent.
     */
    getExtent: function() {
        var extent = null;
        if (this.sphericalMercator) {
            extent = this.map.calculateBounds();
        } else {
            extent = OpenLayers.Layer.FixedZoomLevels.prototype.getExtent.apply(this);
        }
        return extent;
    },

    /**
     * Method: getLonLatFromViewPortPx
     * Get a map location from a pixel location
     * 
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>}
     *
     * Returns:
     *  {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in view
     *  port OpenLayers.Pixel, translated into lon/lat by map lib
     *  If the map lib is not loaded or not centered, returns null
     */
    getLonLatFromViewPortPx: function (viewPortPx) {
        return OpenLayers.Layer.prototype.getLonLatFromViewPortPx.apply(this, arguments);
    },
    
    /**
     * Method: getViewPortPxFromLonLat
     * Get a pixel location from a map location
     *
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     *
     * Returns:
     * {<OpenLayers.Pixel>} An OpenLayers.Pixel which is the passed-in
     * OpenLayers.LonLat, translated into view port pixels by map lib
     * If map lib is not loaded or not centered, returns null
     */
    getViewPortPxFromLonLat: function (lonlat) {
        return OpenLayers.Layer.prototype.getViewPortPxFromLonLat.apply(this, arguments);
    },

    /** 
     * Method: initMercatorParameters 
     * Set up the mercator parameters on the layer: resolutions,
     *     projection, units.
     */
    initMercatorParameters: function() {
        // set up properties for Mercator - assume EPSG:900913
        this.RESOLUTIONS = [];
        var maxResolution = 156543.03390625;
        for(var zoom=0; zoom<=this.MAX_ZOOM_LEVEL; ++zoom) {
            this.RESOLUTIONS[zoom] = maxResolution / Math.pow(2, zoom);
        }
        this.units = "m";
        this.projection = this.projection || "EPSG:900913";
    },

    /**
     * APIMethod: forwardMercator
     * Given a lon,lat in EPSG:4326, return a point in Spherical Mercator.
     *
     * Parameters:
     * lon - {float} 
     * lat - {float}
     * 
     * Returns:
     * {<OpenLayers.LonLat>} The coordinates transformed to Mercator.
     */
    forwardMercator: (function() {
        var gg = new OpenLayers.Projection("EPSG:4326");
        var sm = new OpenLayers.Projection("EPSG:900913");
        return function(lon, lat) {
            var point = OpenLayers.Projection.transform({x: lon, y: lat}, gg, sm);
            return new OpenLayers.LonLat(point.x, point.y);
        };
    })(),

    /**
     * APIMethod: inverseMercator
     * Given a x,y in Spherical Mercator, return a point in EPSG:4326.
     *
     * Parameters:
     * x - {float} A map x in Spherical Mercator.
     * y - {float} A map y in Spherical Mercator.
     * 
     * Returns:
     * {<OpenLayers.LonLat>} The coordinates transformed to EPSG:4326.
     */
    inverseMercator: (function() {
        var gg = new OpenLayers.Projection("EPSG:4326");
        var sm = new OpenLayers.Projection("EPSG:900913");
        return function(x, y) {
            var point = OpenLayers.Projection.transform({x: x, y: y}, sm, gg);
            return new OpenLayers.LonLat(point.x, point.y);
        };
    })()

};
/* ======================================================================
    OpenLayers/Layer/EventPane.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer.js
 * @requires OpenLayers/Util.js
 */

/**
 * Class: OpenLayers.Layer.EventPane
 * Base class for 3rd party layers, providing a DOM element which isolates
 * the 3rd-party layer from mouse events.
 * Only used by Google layers.
 *
 * Automatically instantiated by the Google constructor, and not usually instantiated directly.
 *
 * Create a new event pane layer with the
 * <OpenLayers.Layer.EventPane> constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Layer>
 */
OpenLayers.Layer.EventPane = OpenLayers.Class(OpenLayers.Layer, {
    
    /**
     * APIProperty: smoothDragPan
     * {Boolean} smoothDragPan determines whether non-public/internal API
     *     methods are used for better performance while dragging EventPane 
     *     layers. When not in sphericalMercator mode, the smoother dragging 
     *     doesn't actually move north/south directly with the number of 
     *     pixels moved, resulting in a slight offset when you drag your mouse 
     *     north south with this option on. If this visual disparity bothers 
     *     you, you should turn this option off, or use spherical mercator. 
     *     Default is on.
     */
    smoothDragPan: true,

    /**
     * Property: isBaseLayer
     * {Boolean} EventPaned layers are always base layers, by necessity.
     */ 
    isBaseLayer: true,

    /**
     * APIProperty: isFixed
     * {Boolean} EventPaned layers are fixed by default.
     */ 
    isFixed: true,

    /**
     * Property: pane
     * {DOMElement} A reference to the element that controls the events.
     */
    pane: null,


    /**
     * Property: mapObject
     * {Object} This is the object which will be used to load the 3rd party library
     * in the case of the google layer, this will be of type GMap, 
     * in the case of the ve layer, this will be of type VEMap
     */ 
    mapObject: null,


    /**
     * Constructor: OpenLayers.Layer.EventPane
     * Create a new event pane layer
     *
     * Parameters:
     * name - {String}
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, options) {
        OpenLayers.Layer.prototype.initialize.apply(this, arguments);
        if (this.pane == null) {
            this.pane = OpenLayers.Util.createDiv(this.div.id + "_EventPane");
        }
    },
    
    /**
     * APIMethod: destroy
     * Deconstruct this layer.
     */
    destroy: function() {
        this.mapObject = null;
        this.pane = null;
        OpenLayers.Layer.prototype.destroy.apply(this, arguments); 
    },

    
    /**
     * Method: setMap
     * Set the map property for the layer. This is done through an accessor
     * so that subclasses can override this and take special action once 
     * they have their map variable set. 
     *
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        OpenLayers.Layer.prototype.setMap.apply(this, arguments);
        
        this.pane.style.zIndex = parseInt(this.div.style.zIndex) + 1;
        this.pane.style.display = this.div.style.display;
        this.pane.style.width="100%";
        this.pane.style.height="100%";
        if (OpenLayers.BROWSER_NAME == "msie") {
            this.pane.style.background = 
                "url(" + OpenLayers.Util.getImageLocation("blank.gif") + ")";
        }

        if (this.isFixed) {
            this.map.viewPortDiv.appendChild(this.pane);
        } else {
            this.map.layerContainerDiv.appendChild(this.pane);
        }

        // once our layer has been added to the map, we can load it
        this.loadMapObject();
    
        // if map didn't load, display warning
        if (this.mapObject == null) {
            this.loadWarningMessage();
        }
    },

    /**
     * APIMethod: removeMap
     * On being removed from the map, we'll like to remove the invisible 'pane'
     *     div that we added to it on creation. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        if (this.pane && this.pane.parentNode) {
            this.pane.parentNode.removeChild(this.pane);
        }
        OpenLayers.Layer.prototype.removeMap.apply(this, arguments);
    },
  
    /**
     * Method: loadWarningMessage
     * If we can't load the map lib, then display an error message to the 
     *     user and tell them where to go for help.
     * 
     *     This function sets up the layout for the warning message. Each 3rd
     *     party layer must implement its own getWarningHTML() function to 
     *     provide the actual warning message.
     */
    loadWarningMessage:function() {

        this.div.style.backgroundColor = "darkblue";

        var viewSize = this.map.getSize();
        
        var msgW = Math.min(viewSize.w, 300);
        var msgH = Math.min(viewSize.h, 200);
        var size = new OpenLayers.Size(msgW, msgH);

        var centerPx = new OpenLayers.Pixel(viewSize.w/2, viewSize.h/2);

        var topLeft = centerPx.add(-size.w/2, -size.h/2);            

        var div = OpenLayers.Util.createDiv(this.name + "_warning", 
                                            topLeft, 
                                            size,
                                            null,
                                            null,
                                            null,
                                            "auto");

        div.style.padding = "7px";
        div.style.backgroundColor = "yellow";

        div.innerHTML = this.getWarningHTML();
        this.div.appendChild(div);
    },
  
    /** 
     * Method: getWarningHTML
     * To be implemented by subclasses.
     * 
     * Returns:
     * {String} String with information on why layer is broken, how to get
     *          it working.
     */
    getWarningHTML:function() {
        //should be implemented by subclasses
        return "";
    },
  
    /**
     * Method: display
     * Set the display on the pane
     *
     * Parameters:
     * display - {Boolean}
     */
    display: function(display) {
        OpenLayers.Layer.prototype.display.apply(this, arguments);
        this.pane.style.display = this.div.style.display;
    },
  
    /**
     * Method: setZIndex
     * Set the z-index order for the pane.
     * 
     * Parameters:
     * zIndex - {int}
     */
    setZIndex: function (zIndex) {
        OpenLayers.Layer.prototype.setZIndex.apply(this, arguments);
        this.pane.style.zIndex = parseInt(this.div.style.zIndex) + 1;
    },
    
    /**
     * Method: moveByPx
     * Move the layer based on pixel vector. To be implemented by subclasses.
     *
     * Parameters:
     * dx - {Number} The x coord of the displacement vector.
     * dy - {Number} The y coord of the displacement vector.
     */
    moveByPx: function(dx, dy) {
        OpenLayers.Layer.prototype.moveByPx.apply(this, arguments);
        
        if (this.dragPanMapObject) {
            this.dragPanMapObject(dx, -dy);
        } else {
            this.moveTo(this.map.getCachedCenter());
        }
    },

    /**
     * Method: moveTo
     * Handle calls to move the layer.
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * zoomChanged - {Boolean}
     * dragging - {Boolean}
     */
    moveTo:function(bounds, zoomChanged, dragging) {
        OpenLayers.Layer.prototype.moveTo.apply(this, arguments);

        if (this.mapObject != null) {

            var newCenter = this.map.getCenter();
            var newZoom = this.map.getZoom();

            if (newCenter != null) {

                var moOldCenter = this.getMapObjectCenter();
                var oldCenter = this.getOLLonLatFromMapObjectLonLat(moOldCenter);

                var moOldZoom = this.getMapObjectZoom();
                var oldZoom= this.getOLZoomFromMapObjectZoom(moOldZoom);

                if (!(newCenter.equals(oldCenter)) || newZoom != oldZoom) {

                    if (!zoomChanged && oldCenter && this.dragPanMapObject && 
                        this.smoothDragPan) {
                        var oldPx = this.map.getViewPortPxFromLonLat(oldCenter);
                        var newPx = this.map.getViewPortPxFromLonLat(newCenter);
                        this.dragPanMapObject(newPx.x-oldPx.x, oldPx.y-newPx.y);
                    } else {
                        var center = this.getMapObjectLonLatFromOLLonLat(newCenter);
                        var zoom = this.getMapObjectZoomFromOLZoom(newZoom);
                        this.setMapObjectCenter(center, zoom, dragging);
                    }
                }
            }
        }
    },


  /********************************************************/
  /*                                                      */
  /*                 Baselayer Functions                  */
  /*                                                      */
  /********************************************************/

    /**
     * Method: getLonLatFromViewPortPx
     * Get a map location from a pixel location
     * 
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>}
     *
     * Returns:
     *  {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in view
     *  port OpenLayers.Pixel, translated into lon/lat by map lib
     *  If the map lib is not loaded or not centered, returns null
     */
    getLonLatFromViewPortPx: function (viewPortPx) {
        var lonlat = null;
        if ( (this.mapObject != null) && 
             (this.getMapObjectCenter() != null) ) {
            var moPixel = this.getMapObjectPixelFromOLPixel(viewPortPx);
            var moLonLat = this.getMapObjectLonLatFromMapObjectPixel(moPixel);
            lonlat = this.getOLLonLatFromMapObjectLonLat(moLonLat);
        }
        return lonlat;
    },

 
    /**
     * Method: getViewPortPxFromLonLat
     * Get a pixel location from a map location
     *
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>}
     *
     * Returns:
     * {<OpenLayers.Pixel>} An OpenLayers.Pixel which is the passed-in
     * OpenLayers.LonLat, translated into view port pixels by map lib
     * If map lib is not loaded or not centered, returns null
     */
    getViewPortPxFromLonLat: function (lonlat) {
        var viewPortPx = null;
        if ( (this.mapObject != null) && 
             (this.getMapObjectCenter() != null) ) {

            var moLonLat = this.getMapObjectLonLatFromOLLonLat(lonlat);
            var moPixel = this.getMapObjectPixelFromMapObjectLonLat(moLonLat);
        
            viewPortPx = this.getOLPixelFromMapObjectPixel(moPixel);
        }
        return viewPortPx;
    },

  /********************************************************/
  /*                                                      */
  /*               Translation Functions                  */
  /*                                                      */
  /*   The following functions translate Map Object and   */
  /*            OL formats for Pixel, LonLat              */
  /*                                                      */
  /********************************************************/

  //
  // TRANSLATION: MapObject LatLng <-> OpenLayers.LonLat
  //

    /**
     * Method: getOLLonLatFromMapObjectLonLat
     * Get an OL style map location from a 3rd party style map location
     *
     * Parameters
     * moLonLat - {Object}
     * 
     * Returns:
     * {<OpenLayers.LonLat>} An OpenLayers.LonLat, translated from the passed in 
     *          MapObject LonLat
     *          Returns null if null value is passed in
     */
    getOLLonLatFromMapObjectLonLat: function(moLonLat) {
        var olLonLat = null;
        if (moLonLat != null) {
            var lon = this.getLongitudeFromMapObjectLonLat(moLonLat);
            var lat = this.getLatitudeFromMapObjectLonLat(moLonLat);
            olLonLat = new OpenLayers.LonLat(lon, lat);
        }
        return olLonLat;
    },

    /**
     * Method: getMapObjectLonLatFromOLLonLat
     * Get a 3rd party map location from an OL map location.
     *
     * Parameters:
     * olLonLat - {<OpenLayers.LonLat>}
     * 
     * Returns:
     * {Object} A MapObject LonLat, translated from the passed in 
     *          OpenLayers.LonLat
     *          Returns null if null value is passed in
     */
    getMapObjectLonLatFromOLLonLat: function(olLonLat) {
        var moLatLng = null;
        if (olLonLat != null) {
            moLatLng = this.getMapObjectLonLatFromLonLat(olLonLat.lon,
                                                         olLonLat.lat);
        }
        return moLatLng;
    },


  //
  // TRANSLATION: MapObject Pixel <-> OpenLayers.Pixel
  //

    /**
     * Method: getOLPixelFromMapObjectPixel
     * Get an OL pixel location from a 3rd party pixel location.
     *
     * Parameters:
     * moPixel - {Object}
     * 
     * Returns:
     * {<OpenLayers.Pixel>} An OpenLayers.Pixel, translated from the passed in 
     *          MapObject Pixel
     *          Returns null if null value is passed in
     */
    getOLPixelFromMapObjectPixel: function(moPixel) {
        var olPixel = null;
        if (moPixel != null) {
            var x = this.getXFromMapObjectPixel(moPixel);
            var y = this.getYFromMapObjectPixel(moPixel);
            olPixel = new OpenLayers.Pixel(x, y);
        }
        return olPixel;
    },

    /**
     * Method: getMapObjectPixelFromOLPixel
     * Get a 3rd party pixel location from an OL pixel location
     *
     * Parameters:
     * olPixel - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {Object} A MapObject Pixel, translated from the passed in 
     *          OpenLayers.Pixel
     *          Returns null if null value is passed in
     */
    getMapObjectPixelFromOLPixel: function(olPixel) {
        var moPixel = null;
        if (olPixel != null) {
            moPixel = this.getMapObjectPixelFromXY(olPixel.x, olPixel.y);
        }
        return moPixel;
    },

    CLASS_NAME: "OpenLayers.Layer.EventPane"
});
/* ======================================================================
    OpenLayers/Layer/FixedZoomLevels.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer.js
 */

/**
 * Class: OpenLayers.Layer.FixedZoomLevels
 *   Some Layers will already have established zoom levels (like google 
 *    or ve). Instead of trying to determine them and populate a resolutions[]
 *    Array with those values, we will hijack the resolution functionality
 *    here.
 * 
 *   When you subclass FixedZoomLevels: 
 * 
 *   The initResolutions() call gets nullified, meaning no resolutions[] array 
 *    is set up. Which would be a big problem getResolution() in Layer, since 
 *    it merely takes map.zoom and indexes into resolutions[]... but....
 * 
 *   The getResolution() call is also overridden. Instead of using the 
 *    resolutions[] array, we simply calculate the current resolution based
 *    on the current extent and the current map size. But how will we be able
 *    to calculate the current extent without knowing the resolution...?
 *  
 *   The getExtent() function is also overridden. Instead of calculating extent
 *    based on the center point and the current resolution, we instead 
 *    calculate the extent by getting the lonlats at the top-left and 
 *    bottom-right by using the getLonLatFromViewPortPx() translation function,
 *    taken from the pixel locations (0,0) and the size of the map. But how 
 *    will we be able to do lonlat-px translation without resolution....?
 * 
 *   The getZoomForResolution() method is overridden. Instead of indexing into
 *    the resolutions[] array, we call OpenLayers.Layer.getExent(), passing in
 *    the desired resolution. With this extent, we then call getZoomForExtent() 
 * 
 * 
 *   Whenever you implement a layer using OpenLayers.Layer.FixedZoomLevels, 
 *    it is your responsibility to provide the following three functions:
 * 
 *   - getLonLatFromViewPortPx
 *   - getViewPortPxFromLonLat
 *   - getZoomForExtent
 * 
 *  ...those three functions should generally be provided by any reasonable 
 *  API that you might be working from.
 *
 */
OpenLayers.Layer.FixedZoomLevels = OpenLayers.Class({
      
  /********************************************************/
  /*                                                      */
  /*                 Baselayer Functions                  */
  /*                                                      */
  /*    The following functions must all be implemented   */
  /*                  by all base layers                  */
  /*                                                      */
  /********************************************************/
    
    /**
     * Constructor: OpenLayers.Layer.FixedZoomLevels
     * Create a new fixed zoom levels layer.
     */
    initialize: function() {
        //this class is only just to add the following functions... 
        // nothing to actually do here... but it is probably a good
        // idea to have layers that use these functions call this 
        // inititalize() anyways, in case at some point we decide we 
        // do want to put some functionality or state in here. 
    },
    
    /**
     * Method: initResolutions
     * Populate the resolutions array
     */
    initResolutions: function() {

        var props = ['minZoomLevel', 'maxZoomLevel', 'numZoomLevels'];
          
        for(var i=0, len=props.length; i<len; i++) {
            var property = props[i];
            this[property] = (this.options[property] != null)  
                                     ? this.options[property] 
                                     : this.map[property];
        }

        if ( (this.minZoomLevel == null) ||
             (this.minZoomLevel < this.MIN_ZOOM_LEVEL) ){
            this.minZoomLevel = this.MIN_ZOOM_LEVEL;
        }        

        //
        // At this point, we know what the minimum desired zoom level is, and
        //  we must calculate the total number of zoom levels. 
        //  
        //  Because we allow for the setting of either the 'numZoomLevels'
        //   or the 'maxZoomLevel' properties... on either the layer or the  
        //   map, we have to define some rules to see which we take into
        //   account first in this calculation. 
        //
        // The following is the precedence list for these properties:
        // 
        // (1) numZoomLevels set on layer
        // (2) maxZoomLevel set on layer
        // (3) numZoomLevels set on map
        // (4) maxZoomLevel set on map*
        // (5) none of the above*
        //
        // *Note that options (4) and (5) are only possible if the user 
        //  _explicitly_ sets the 'numZoomLevels' property on the map to 
        //  null, since it is set by default to 16. 
        //

        //
        // Note to future: In 3.0, I think we should remove the default 
        // value of 16 for map.numZoomLevels. Rather, I think that value 
        // should be set as a default on the Layer.WMS class. If someone
        // creates a 3rd party layer and does not specify any 'minZoomLevel', 
        // 'maxZoomLevel', or 'numZoomLevels', and has not explicitly 
        // specified any of those on the map object either.. then I think
        // it is fair to say that s/he wants all the zoom levels available.
        // 
        // By making map.numZoomLevels *null* by default, that will be the 
        // case. As it is, I don't feel comfortable changing that right now
        // as it would be a glaring API change and actually would probably
        // break many peoples' codes. 
        //

        //the number of zoom levels we'd like to have.
        var desiredZoomLevels;

        //this is the maximum number of zoom levels the layer will allow, 
        // given the specified starting minimum zoom level.
        var limitZoomLevels = this.MAX_ZOOM_LEVEL - this.minZoomLevel + 1;

        if ( ((this.options.numZoomLevels == null) && 
              (this.options.maxZoomLevel != null)) // (2)
              ||
             ((this.numZoomLevels == null) &&
              (this.maxZoomLevel != null)) // (4)
           ) {
            //calculate based on specified maxZoomLevel (on layer or map)
            desiredZoomLevels = this.maxZoomLevel - this.minZoomLevel + 1;
        } else {
            //calculate based on specified numZoomLevels (on layer or map)
            // this covers cases (1) and (3)
            desiredZoomLevels = this.numZoomLevels;
        }

        if (desiredZoomLevels != null) {
            //Now that we know what we would *like* the number of zoom levels
            // to be, based on layer or map options, we have to make sure that
            // it does not conflict with the actual limit, as specified by 
            // the constants on the layer itself (and calculated into the
            // 'limitZoomLevels' variable). 
            this.numZoomLevels = Math.min(desiredZoomLevels, limitZoomLevels);
        } else {
            // case (5) -- neither 'numZoomLevels' not 'maxZoomLevel' was 
            // set on either the layer or the map. So we just use the 
            // maximum limit as calculated by the layer's constants.
            this.numZoomLevels = limitZoomLevels;
        }

        //now that the 'numZoomLevels' is appropriately, safely set, 
        // we go back and re-calculate the 'maxZoomLevel'.
        this.maxZoomLevel = this.minZoomLevel + this.numZoomLevels - 1;

        if (this.RESOLUTIONS != null) {
            var resolutionsIndex = 0;
            this.resolutions = [];
            for(var i= this.minZoomLevel; i <= this.maxZoomLevel; i++) {
                this.resolutions[resolutionsIndex++] = this.RESOLUTIONS[i];            
            }
            this.maxResolution = this.resolutions[0];
            this.minResolution = this.resolutions[this.resolutions.length - 1];
        }       
    },
    
    /**
     * APIMethod: getResolution
     * Get the current map resolution
     * 
     * Returns:
     * {Float} Map units per Pixel
     */
    getResolution: function() {

        if (this.resolutions != null) {
            return OpenLayers.Layer.prototype.getResolution.apply(this, arguments);
        } else {
            var resolution = null;
            
            var viewSize = this.map.getSize();
            var extent = this.getExtent();
            
            if ((viewSize != null) && (extent != null)) {
                resolution = Math.max( extent.getWidth()  / viewSize.w,
                                       extent.getHeight() / viewSize.h );
            }
            return resolution;
        }
     },

    /**
     * APIMethod: getExtent
     * Calculates using px-> lonlat translation functions on tl and br 
     *     corners of viewport
     * 
     * Returns:
     * {<OpenLayers.Bounds>} A Bounds object which represents the lon/lat 
     *                       bounds of the current viewPort.
     */
    getExtent: function () {
        var size = this.map.getSize();
        var tl = this.getLonLatFromViewPortPx({
            x: 0, y: 0
        });
        var br = this.getLonLatFromViewPortPx({
            x: size.w, y: size.h
        });
        
        if ((tl != null) && (br != null)) {
            return new OpenLayers.Bounds(tl.lon, br.lat, br.lon, tl.lat);
        } else {
            return null;
        }
    },

    /**
     * Method: getZoomForResolution
     * Get the zoom level for a given resolution
     *
     * Parameters:
     * resolution - {Float}
     *
     * Returns:
     * {Integer} A suitable zoom level for the specified resolution.
     *           If no baselayer is set, returns null.
     */
    getZoomForResolution: function(resolution) {
      
        if (this.resolutions != null) {
            return OpenLayers.Layer.prototype.getZoomForResolution.apply(this, arguments);
        } else {
            var extent = OpenLayers.Layer.prototype.getExtent.apply(this, []);
            return this.getZoomForExtent(extent);
        }
    },



    
    /********************************************************/
    /*                                                      */
    /*             Translation Functions                    */
    /*                                                      */
    /*    The following functions translate GMaps and OL    */ 
    /*     formats for Pixel, LonLat, Bounds, and Zoom      */
    /*                                                      */
    /********************************************************/
    
    
    //
    // TRANSLATION: MapObject Zoom <-> OpenLayers Zoom
    //
  
    /**
     * Method: getOLZoomFromMapObjectZoom
     * Get the OL zoom index from the map object zoom level
     *
     * Parameters:
     * moZoom - {Integer}
     * 
     * Returns:
     * {Integer} An OpenLayers Zoom level, translated from the passed in zoom
     *           Returns null if null value is passed in
     */
    getOLZoomFromMapObjectZoom: function(moZoom) {
        var zoom = null;
        if (moZoom != null) {
            zoom = moZoom - this.minZoomLevel;
            if (this.map.baseLayer !== this) {
                zoom = this.map.baseLayer.getZoomForResolution(
                    this.getResolutionForZoom(zoom)
                );
            }
        }
        return zoom;
    },
    
    /**
     * Method: getMapObjectZoomFromOLZoom
     * Get the map object zoom level from the OL zoom level
     *
     * Parameters:
     * olZoom - {Integer}
     * 
     * Returns:
     * {Integer} A MapObject level, translated from the passed in olZoom
     *           Returns null if null value is passed in
     */
    getMapObjectZoomFromOLZoom: function(olZoom) {
        var zoom = null; 
        if (olZoom != null) {
            zoom = olZoom + this.minZoomLevel;
            if (this.map.baseLayer !== this) {
                zoom = this.getZoomForResolution(
                    this.map.baseLayer.getResolutionForZoom(zoom)
                );
            }
        }
        return zoom;
    },

    CLASS_NAME: "OpenLayers.Layer.FixedZoomLevels"
});

/* ======================================================================
    OpenLayers/Layer/Google.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/SphericalMercator.js
 * @requires OpenLayers/Layer/EventPane.js
 * @requires OpenLayers/Layer/FixedZoomLevels.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Class: OpenLayers.Layer.Google
 * 
 * Provides a wrapper for Google's Maps API
 * Normally the Terms of Use for this API do not allow wrapping, but Google
 * have provided written consent to OpenLayers for this - see email in 
 * http://osgeo-org.1560.n6.nabble.com/Google-Maps-API-Terms-of-Use-changes-tp4910013p4911981.html
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.SphericalMercator>
 *  - <OpenLayers.Layer.EventPane>
 *  - <OpenLayers.Layer.FixedZoomLevels>
 */
OpenLayers.Layer.Google = OpenLayers.Class(
    OpenLayers.Layer.EventPane, 
    OpenLayers.Layer.FixedZoomLevels, {
    
    /** 
     * Constant: MIN_ZOOM_LEVEL
     * {Integer} 0 
     */
    MIN_ZOOM_LEVEL: 0,
    
    /** 
     * Constant: MAX_ZOOM_LEVEL
     * {Integer} 21
     */
    MAX_ZOOM_LEVEL: 21,

    /** 
     * Constant: RESOLUTIONS
     * {Array(Float)} Hardcode these resolutions so that they are more closely
     *                tied with the standard wms projection
     */
    RESOLUTIONS: [
        1.40625, 
        0.703125, 
        0.3515625, 
        0.17578125, 
        0.087890625, 
        0.0439453125,
        0.02197265625, 
        0.010986328125, 
        0.0054931640625, 
        0.00274658203125,
        0.001373291015625, 
        0.0006866455078125, 
        0.00034332275390625,
        0.000171661376953125, 
        0.0000858306884765625, 
        0.00004291534423828125,
        0.00002145767211914062, 
        0.00001072883605957031,
        0.00000536441802978515, 
        0.00000268220901489257,
        0.0000013411045074462891,
        0.00000067055225372314453
    ],

    /**
     * APIProperty: type
     * {GMapType}
     */
    type: null,

    /**
     * APIProperty: wrapDateLine
     * {Boolean} Allow user to pan forever east/west.  Default is true.  
     *     Setting this to false only restricts panning if 
     *     <sphericalMercator> is true. 
     */
    wrapDateLine: true,

    /**
     * APIProperty: sphericalMercator
     * {Boolean} Should the map act as a mercator-projected map? This will
     *     cause all interactions with the map to be in the actual map 
     *     projection, which allows support for vector drawing, overlaying 
     *     other maps, etc. 
     */
    sphericalMercator: false, 
    
    /**
     * Property: version
     * {Number} The version of the Google Maps API
     */
    version: null,

    /** 
     * Constructor: OpenLayers.Layer.Google
     * 
     * Parameters:
     * name - {String} A name for the layer.
     * options - {Object} An optional object whose properties will be set
     *     on the layer.
     */
    initialize: function(name, options) {
        options = options || {};
        if(!options.version) {
            options.version = typeof GMap2 === "function" ? "2" : "3";
        }
        var mixin = OpenLayers.Layer.Google["v" +
            options.version.replace(/\./g, "_")];
        if (mixin) {
            OpenLayers.Util.applyDefaults(options, mixin);
        } else {
            throw "Unsupported Google Maps API version: " + options.version;
        }

        OpenLayers.Util.applyDefaults(options, mixin.DEFAULTS);
        if (options.maxExtent) {
            options.maxExtent = options.maxExtent.clone();
        }

        OpenLayers.Layer.EventPane.prototype.initialize.apply(this,
            [name, options]);
        OpenLayers.Layer.FixedZoomLevels.prototype.initialize.apply(this, 
            [name, options]);

        if (this.sphericalMercator) {
            OpenLayers.Util.extend(this, OpenLayers.Layer.SphericalMercator);
            this.initMercatorParameters();
        }    
    },

    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Returns:
     * {<OpenLayers.Layer.Google>} An exact clone of this layer
     */
    clone: function() {
        /**
         * This method isn't intended to be called by a subclass and it
         * doesn't call the same method on the superclass.  We don't call
         * the super's clone because we don't want properties that are set
         * on this layer after initialize (i.e. this.mapObject etc.).
         */
        return new OpenLayers.Layer.Google(
            this.name, this.getOptions()
        );
    },

    /**
     * APIMethod: setVisibility
     * Set the visibility flag for the layer and hide/show & redraw 
     *     accordingly. Fire event unless otherwise specified
     * 
     * Note that visibility is no longer simply whether or not the layer's
     *     style.display is set to "block". Now we store a 'visibility' state 
     *     property on the layer class, this allows us to remember whether or 
     *     not we *desire* for a layer to be visible. In the case where the 
     *     map's resolution is out of the layer's range, this desire may be 
     *     subverted.
     * 
     * Parameters:
     * visible - {Boolean} Display the layer (if in range)
     */
    setVisibility: function(visible) {
        // sharing a map container, opacity has to be set per layer
        var opacity = this.opacity == null ? 1 : this.opacity;
        OpenLayers.Layer.EventPane.prototype.setVisibility.apply(this, arguments);
        this.setOpacity(opacity);
    },
    
    /** 
     * APIMethod: display
     * Hide or show the Layer
     * 
     * Parameters:
     * visible - {Boolean}
     */
    display: function(visible) {
        if (!this._dragging) {
            this.setGMapVisibility(visible);
        }
        OpenLayers.Layer.EventPane.prototype.display.apply(this, arguments);
    },
    
    /**
     * Method: moveTo
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * zoomChanged - {Boolean} Tells when zoom has changed, as layers have to
     *     do some init work in that case.
     * dragging - {Boolean}
     */
    moveTo: function(bounds, zoomChanged, dragging) {
        this._dragging = dragging;
        OpenLayers.Layer.EventPane.prototype.moveTo.apply(this, arguments);
        delete this._dragging;
    },
    
    /**
     * APIMethod: setOpacity
     * Sets the opacity for the entire layer (all images)
     * 
     * Parameters:
     * opacity - {Float}
     */
    setOpacity: function(opacity) {
        if (opacity !== this.opacity) {
            if (this.map != null) {
                this.map.events.triggerEvent("changelayer", {
                    layer: this,
                    property: "opacity"
                });
            }
            this.opacity = opacity;
        }
        // Though this layer's opacity may not change, we're sharing a container
        // and need to update the opacity for the entire container.
        if (this.getVisibility()) {
            var container = this.getMapContainer();
            OpenLayers.Util.modifyDOMElement(
                container, null, null, null, null, null, null, opacity
            );
        }
    },

    /**
     * APIMethod: destroy
     * Clean up this layer.
     */
    destroy: function() {
        /**
         * We have to override this method because the event pane destroy
         * deletes the mapObject reference before removing this layer from
         * the map.
         */
        if (this.map) {
            this.setGMapVisibility(false);
            var cache = OpenLayers.Layer.Google.cache[this.map.id];
            if (cache && cache.count <= 1) {
                this.removeGMapElements();
            }            
        }
        OpenLayers.Layer.EventPane.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: removeGMapElements
     * Remove all elements added to the dom.  This should only be called if
     * this is the last of the Google layers for the given map.
     */
    removeGMapElements: function() {
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            // remove shared elements from dom
            var container = this.mapObject && this.getMapContainer();                
            if (container && container.parentNode) {
                container.parentNode.removeChild(container);
            }
            var termsOfUse = cache.termsOfUse;
            if (termsOfUse && termsOfUse.parentNode) {
                termsOfUse.parentNode.removeChild(termsOfUse);
            }
            var poweredBy = cache.poweredBy;
            if (poweredBy && poweredBy.parentNode) {
                poweredBy.parentNode.removeChild(poweredBy);
            }
        }
    },

    /**
     * APIMethod: removeMap
     * On being removed from the map, also remove termsOfUse and poweredBy divs
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        // hide layer before removing
        if (this.visibility && this.mapObject) {
            this.setGMapVisibility(false);
        }
        // check to see if last Google layer in this map
        var cache = OpenLayers.Layer.Google.cache[map.id];
        if (cache) {
            if (cache.count <= 1) {
                this.removeGMapElements();
                delete OpenLayers.Layer.Google.cache[map.id];
            } else {
                // decrement the layer count
                --cache.count;
            }
        }
        // remove references to gmap elements
        delete this.termsOfUse;
        delete this.poweredBy;
        delete this.mapObject;
        delete this.dragObject;
        OpenLayers.Layer.EventPane.prototype.removeMap.apply(this, arguments);
    },
    
  //
  // TRANSLATION: MapObject Bounds <-> OpenLayers.Bounds
  //

    /**
     * APIMethod: getOLBoundsFromMapObjectBounds
     * 
     * Parameters:
     * moBounds - {Object}
     * 
     * Returns:
     * {<OpenLayers.Bounds>} An <OpenLayers.Bounds>, translated from the 
     *                       passed-in MapObject Bounds.
     *                       Returns null if null value is passed in.
     */
    getOLBoundsFromMapObjectBounds: function(moBounds) {
        var olBounds = null;
        if (moBounds != null) {
            var sw = moBounds.getSouthWest();
            var ne = moBounds.getNorthEast();
            if (this.sphericalMercator) {
                sw = this.forwardMercator(sw.lng(), sw.lat());
                ne = this.forwardMercator(ne.lng(), ne.lat());
            } else {
                sw = new OpenLayers.LonLat(sw.lng(), sw.lat()); 
                ne = new OpenLayers.LonLat(ne.lng(), ne.lat()); 
            }    
            olBounds = new OpenLayers.Bounds(sw.lon, 
                                             sw.lat, 
                                             ne.lon, 
                                             ne.lat );
        }
        return olBounds;
    },

    /** 
     * APIMethod: getWarningHTML
     * 
     * Returns: 
     * {String} String with information on why layer is broken, how to get
     *          it working.
     */
    getWarningHTML:function() {
        return OpenLayers.i18n("googleWarning");
    },


    /************************************
     *                                  *
     *   MapObject Interface Controls   *
     *                                  *
     ************************************/


  // Get&Set Center, Zoom

    /**
     * APIMethod: getMapObjectCenter
     * 
     * Returns: 
     * {Object} The mapObject's current center in Map Object format
     */
    getMapObjectCenter: function() {
        return this.mapObject.getCenter();
    },

    /** 
     * APIMethod: getMapObjectZoom
     * 
     * Returns:
     * {Integer} The mapObject's current zoom, in Map Object format
     */
    getMapObjectZoom: function() {
        return this.mapObject.getZoom();
    },

  
    /************************************
     *                                  *
     *       MapObject Primitives       *
     *                                  *
     ************************************/


  // LonLat
    
    /**
     * APIMethod: getLongitudeFromMapObjectLonLat
     * 
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     * 
     * Returns:
     * {Float} Longitude of the given MapObject LonLat
     */
    getLongitudeFromMapObjectLonLat: function(moLonLat) {
        return this.sphericalMercator ? 
          this.forwardMercator(moLonLat.lng(), moLonLat.lat()).lon :
          moLonLat.lng();  
    },

    /**
     * APIMethod: getLatitudeFromMapObjectLonLat
     * 
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     * 
     * Returns:
     * {Float} Latitude of the given MapObject LonLat
     */
    getLatitudeFromMapObjectLonLat: function(moLonLat) {
        var lat = this.sphericalMercator ? 
          this.forwardMercator(moLonLat.lng(), moLonLat.lat()).lat :
          moLonLat.lat(); 
        return lat;  
    },
    
  // Pixel
    
    /**
     * APIMethod: getXFromMapObjectPixel
     * 
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     * 
     * Returns:
     * {Integer} X value of the MapObject Pixel
     */
    getXFromMapObjectPixel: function(moPixel) {
        return moPixel.x;
    },

    /**
     * APIMethod: getYFromMapObjectPixel
     * 
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     * 
     * Returns:
     * {Integer} Y value of the MapObject Pixel
     */
    getYFromMapObjectPixel: function(moPixel) {
        return moPixel.y;
    },
    
    CLASS_NAME: "OpenLayers.Layer.Google"
});

/**
 * Property: OpenLayers.Layer.Google.cache
 * {Object} Cache for elements that should only be created once per map.
 */
OpenLayers.Layer.Google.cache = {};


/**
 * Constant: OpenLayers.Layer.Google.v2
 * 
 * Mixin providing functionality specific to the Google Maps API v2.
 * 
 * This API has been deprecated by Google.
 * Developers are encouraged to migrate to v3 of the API; support for this
 * is provided by <OpenLayers.Layer.Google.v3>
 */
OpenLayers.Layer.Google.v2 = {
    
    /**
     * Property: termsOfUse
     * {DOMElement} Div for Google's copyright and terms of use link
     */
    termsOfUse: null, 

    /**
     * Property: poweredBy
     * {DOMElement} Div for Google's powered by logo and link
     */
    poweredBy: null, 

    /**
     * Property: dragObject
     * {GDraggableObject} Since 2.93, Google has exposed the ability to get
     *     the maps GDraggableObject. We can now use this for smooth panning
     */
    dragObject: null, 
    
    /** 
     * Method: loadMapObject
     * Load the GMap and register appropriate event listeners. If we can't 
     *     load GMap2, then display a warning message.
     */
    loadMapObject:function() {
        if (!this.type) {
            this.type = G_NORMAL_MAP;
        }
        var mapObject, termsOfUse, poweredBy;
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            // there are already Google layers added to this map
            mapObject = cache.mapObject;
            termsOfUse = cache.termsOfUse;
            poweredBy = cache.poweredBy;
            // increment the layer count
            ++cache.count;
        } else {
            // this is the first Google layer for this map

            var container = this.map.viewPortDiv;
            var div = document.createElement("div");
            div.id = this.map.id + "_GMap2Container";
            div.style.position = "absolute";
            div.style.width = "100%";
            div.style.height = "100%";
            container.appendChild(div);

            // create GMap and shuffle elements
            try {
                mapObject = new GMap2(div);
                
                // move the ToS and branding stuff up to the container div
                termsOfUse = div.lastChild;
                container.appendChild(termsOfUse);
                termsOfUse.style.zIndex = "1100";
                termsOfUse.style.right = "";
                termsOfUse.style.bottom = "";
                termsOfUse.className = "olLayerGoogleCopyright";

                poweredBy = div.lastChild;
                container.appendChild(poweredBy);
                poweredBy.style.zIndex = "1100";
                poweredBy.style.right = "";
                poweredBy.style.bottom = "";
                poweredBy.className = "olLayerGooglePoweredBy gmnoprint";
                
            } catch (e) {
                throw(e);
            }
            // cache elements for use by any other google layers added to
            // this same map
            OpenLayers.Layer.Google.cache[this.map.id] = {
                mapObject: mapObject,
                termsOfUse: termsOfUse,
                poweredBy: poweredBy,
                count: 1
            };
        }

        this.mapObject = mapObject;
        this.termsOfUse = termsOfUse;
        this.poweredBy = poweredBy;
        
        // ensure this layer type is one of the mapObject types
        if (OpenLayers.Util.indexOf(this.mapObject.getMapTypes(),
                                    this.type) === -1) {
            this.mapObject.addMapType(this.type);
        }

        //since v 2.93 getDragObject is now available.
        if(typeof mapObject.getDragObject == "function") {
            this.dragObject = mapObject.getDragObject();
        } else {
            this.dragPanMapObject = null;
        }
        
        if(this.isBaseLayer === false) {
            this.setGMapVisibility(this.div.style.display !== "none");
        }

    },

    /**
     * APIMethod: onMapResize
     */
    onMapResize: function() {
        // workaround for resizing of invisible or not yet fully loaded layers
        // where GMap2.checkResize() does not work. We need to load the GMap
        // for the old div size, then checkResize(), and then call
        // layer.moveTo() to trigger GMap.setCenter() (which will finish
        // the GMap initialization).
        if(this.visibility && this.mapObject.isLoaded()) {
            this.mapObject.checkResize();
        } else {
            if(!this._resized) {
                var layer = this;
                var handle = GEvent.addListener(this.mapObject, "load", function() {
                    GEvent.removeListener(handle);
                    delete layer._resized;
                    layer.mapObject.checkResize();
                    layer.moveTo(layer.map.getCenter(), layer.map.getZoom());
                });
            }
            this._resized = true;
        }
    },

    /**
     * Method: setGMapVisibility
     * Display the GMap container and associated elements.
     * 
     * Parameters:
     * visible - {Boolean} Display the GMap elements.
     */
    setGMapVisibility: function(visible) {
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            var container = this.mapObject.getContainer();
            if (visible === true) {
                this.mapObject.setMapType(this.type);
                container.style.display = "";
                this.termsOfUse.style.left = "";
                this.termsOfUse.style.display = "";
                this.poweredBy.style.display = "";            
                cache.displayed = this.id;
            } else {
                if (cache.displayed === this.id) {
                    delete cache.displayed;
                }
                if (!cache.displayed) {
                    container.style.display = "none";
                    this.termsOfUse.style.display = "none";
                    // move ToU far to the left in addition to setting display
                    // to "none", because at the end of the GMap2 load
                    // sequence, display: none will be unset and ToU would be
                    // visible after loading a map with a google layer that is
                    // initially hidden. 
                    this.termsOfUse.style.left = "-9999px";
                    this.poweredBy.style.display = "none";
                }
            }
        }
    },
    
    /**
     * Method: getMapContainer
     * 
     * Returns:
     * {DOMElement} the GMap container's div
     */
    getMapContainer: function() {
        return this.mapObject.getContainer();
    },

  //
  // TRANSLATION: MapObject Bounds <-> OpenLayers.Bounds
  //

    /**
     * APIMethod: getMapObjectBoundsFromOLBounds
     * 
     * Parameters:
     * olBounds - {<OpenLayers.Bounds>}
     * 
     * Returns:
     * {Object} A MapObject Bounds, translated from olBounds
     *          Returns null if null value is passed in
     */
    getMapObjectBoundsFromOLBounds: function(olBounds) {
        var moBounds = null;
        if (olBounds != null) {
            var sw = this.sphericalMercator ? 
              this.inverseMercator(olBounds.bottom, olBounds.left) : 
              new OpenLayers.LonLat(olBounds.bottom, olBounds.left);
            var ne = this.sphericalMercator ? 
              this.inverseMercator(olBounds.top, olBounds.right) : 
              new OpenLayers.LonLat(olBounds.top, olBounds.right);
            moBounds = new GLatLngBounds(new GLatLng(sw.lat, sw.lon),
                                         new GLatLng(ne.lat, ne.lon));
        }
        return moBounds;
    },


    /************************************
     *                                  *
     *   MapObject Interface Controls   *
     *                                  *
     ************************************/


  // Get&Set Center, Zoom

    /** 
     * APIMethod: setMapObjectCenter
     * Set the mapObject to the specified center and zoom
     * 
     * Parameters:
     * center - {Object} MapObject LonLat format
     * zoom - {int} MapObject zoom format
     */
    setMapObjectCenter: function(center, zoom) {
        this.mapObject.setCenter(center, zoom); 
    },
   
    /**
     * APIMethod: dragPanMapObject
     * 
     * Parameters:
     * dX - {Integer}
     * dY - {Integer}
     */
    dragPanMapObject: function(dX, dY) {
        this.dragObject.moveBy(new GSize(-dX, dY));
    },


  // LonLat - Pixel Translation
  
    /**
     * APIMethod: getMapObjectLonLatFromMapObjectPixel
     * 
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     * 
     * Returns:
     * {Object} MapObject LonLat translated from MapObject Pixel
     */
    getMapObjectLonLatFromMapObjectPixel: function(moPixel) {
        return this.mapObject.fromContainerPixelToLatLng(moPixel);
    },

    /**
     * APIMethod: getMapObjectPixelFromMapObjectLonLat
     * 
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     * 
     * Returns:
     * {Object} MapObject Pixel transtlated from MapObject LonLat
     */
    getMapObjectPixelFromMapObjectLonLat: function(moLonLat) {
        return this.mapObject.fromLatLngToContainerPixel(moLonLat);
    },

  
  // Bounds
  
    /** 
     * APIMethod: getMapObjectZoomFromMapObjectBounds
     * 
     * Parameters:
     * moBounds - {Object} MapObject Bounds format
     * 
     * Returns:
     * {Object} MapObject Zoom for specified MapObject Bounds
     */
    getMapObjectZoomFromMapObjectBounds: function(moBounds) {
        return this.mapObject.getBoundsZoomLevel(moBounds);
    },

    /************************************
     *                                  *
     *       MapObject Primitives       *
     *                                  *
     ************************************/


  // LonLat
    
    /**
     * APIMethod: getMapObjectLonLatFromLonLat
     * 
     * Parameters:
     * lon - {Float}
     * lat - {Float}
     * 
     * Returns:
     * {Object} MapObject LonLat built from lon and lat params
     */
    getMapObjectLonLatFromLonLat: function(lon, lat) {
        var gLatLng;
        if(this.sphericalMercator) {
            var lonlat = this.inverseMercator(lon, lat);
            gLatLng = new GLatLng(lonlat.lat, lonlat.lon);
        } else {
            gLatLng = new GLatLng(lat, lon);
        }
        return gLatLng;
    },

  // Pixel
    
    /**
     * APIMethod: getMapObjectPixelFromXY
     * 
     * Parameters:
     * x - {Integer}
     * y - {Integer}
     * 
     * Returns:
     * {Object} MapObject Pixel from x and y parameters
     */
    getMapObjectPixelFromXY: function(x, y) {
        return new GPoint(x, y);
    }
    
};
/* ======================================================================
    OpenLayers/Format/XML.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format.js
 */

/**
 * Class: OpenLayers.Format.XML
 * Read and write XML.  For cross-browser XML generation, use methods on an
 *     instance of the XML format class instead of on <code>document<end>.
 *     The DOM creation and traversing methods exposed here all mimic the
 *     W3C XML DOM methods.  Create a new parser with the
 *     <OpenLayers.Format.XML> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format>
 */
OpenLayers.Format.XML = OpenLayers.Class(OpenLayers.Format, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.  Properties
     *     of this object should not be set individually.  Read-only.  All
     *     XML subclasses should have their own namespaces object.  Use
     *     <setNamespace> to add or set a namespace alias after construction.
     */
    namespaces: null,
    
    /**
     * Property: namespaceAlias
     * {Object} Mapping of namespace URI to namespace alias.  This object
     *     is read-only.  Use <setNamespace> to add or set a namespace alias.
     */
    namespaceAlias: null,
    
    /**
     * Property: defaultPrefix
     * {String} The default namespace alias for creating element nodes.
     */
    defaultPrefix: null,
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {},
    
    /**
     * Property: writers
     * As a compliment to the <readers> property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {},

    /**
     * Property: xmldom
     * {XMLDom} If this browser uses ActiveX, this will be set to a XMLDOM
     *     object.  It is not intended to be a browser sniffing property.
     *     Instead, the xmldom property is used instead of <code>document<end>
     *     where namespaced node creation methods are not supported. In all
     *     other browsers, this remains null.
     */
    xmldom: null,

    /**
     * Constructor: OpenLayers.Format.XML
     * Construct an XML parser.  The parser is used to read and write XML.
     *     Reading XML from a string returns a DOM element.  Writing XML from
     *     a DOM element returns a string.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on
     *     the object.
     */
    initialize: function(options) {
        if(window.ActiveXObject) {
            this.xmldom = new ActiveXObject("Microsoft.XMLDOM");
        }
        OpenLayers.Format.prototype.initialize.apply(this, [options]);
        // clone the namespace object and set all namespace aliases
        this.namespaces = OpenLayers.Util.extend({}, this.namespaces);
        this.namespaceAlias = {};
        for(var alias in this.namespaces) {
            this.namespaceAlias[this.namespaces[alias]] = alias;
        }
    },
    
    /**
     * APIMethod: destroy
     * Clean up.
     */
    destroy: function() {
        this.xmldom = null;
        OpenLayers.Format.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: setNamespace
     * Set a namespace alias and URI for the format.
     *
     * Parameters:
     * alias - {String} The namespace alias (prefix).
     * uri - {String} The namespace URI.
     */
    setNamespace: function(alias, uri) {
        this.namespaces[alias] = uri;
        this.namespaceAlias[uri] = alias;
    },

    /**
     * APIMethod: read
     * Deserialize a XML string and return a DOM node.
     *
     * Parameters:
     * text - {String} A XML string
     
     * Returns:
     * {DOMElement} A DOM node
     */
    read: function(text) {
        var index = text.indexOf('<');
        if(index > 0) {
            text = text.substring(index);
        }
        var node = OpenLayers.Util.Try(
            OpenLayers.Function.bind((
                function() {
                    var xmldom;
                    /**
                     * Since we want to be able to call this method on the prototype
                     * itself, this.xmldom may not exist even if in IE.
                     */
                    if(window.ActiveXObject && !this.xmldom) {
                        xmldom = new ActiveXObject("Microsoft.XMLDOM");
                    } else {
                        xmldom = this.xmldom;
                        
                    }
                    xmldom.loadXML(text);
                    return xmldom;
                }
            ), this),
            function() {
                return new DOMParser().parseFromString(text, 'text/xml');
            },
            function() {
                var req = new XMLHttpRequest();
                req.open("GET", "data:" + "text/xml" +
                         ";charset=utf-8," + encodeURIComponent(text), false);
                if(req.overrideMimeType) {
                    req.overrideMimeType("text/xml");
                }
                req.send(null);
                return req.responseXML;
            }
        );

        if(this.keepData) {
            this.data = node;
        }

        return node;
    },

    /**
     * APIMethod: write
     * Serialize a DOM node into a XML string.
     * 
     * Parameters:
     * node - {DOMElement} A DOM node.
     *
     * Returns:
     * {String} The XML string representation of the input node.
     */
    write: function(node) {
        var data;
        if(this.xmldom) {
            data = node.xml;
        } else {
            var serializer = new XMLSerializer();
            if (node.nodeType == 1) {
                // Add nodes to a document before serializing. Everything else
                // is serialized as is. This may need more work. See #1218 .
                var doc = document.implementation.createDocument("", "", null);
                if (doc.importNode) {
                    node = doc.importNode(node, true);
                }
                doc.appendChild(node);
                data = serializer.serializeToString(doc);
            } else {
                data = serializer.serializeToString(node);
            }
        }
        return data;
    },

    /**
     * APIMethod: createElementNS
     * Create a new element with namespace.  This node can be appended to
     *     another node with the standard node.appendChild method.  For
     *     cross-browser support, this method must be used instead of
     *     document.createElementNS.
     *
     * Parameters:
     * uri - {String} Namespace URI for the element.
     * name - {String} The qualified name of the element (prefix:localname).
     * 
     * Returns:
     * {Element} A DOM element with namespace.
     */
    createElementNS: function(uri, name) {
        var element;
        if(this.xmldom) {
            if(typeof uri == "string") {
                element = this.xmldom.createNode(1, name, uri);
            } else {
                element = this.xmldom.createNode(1, name, "");
            }
        } else {
            element = document.createElementNS(uri, name);
        }
        return element;
    },

    /**
     * APIMethod: createTextNode
     * Create a text node.  This node can be appended to another node with
     *     the standard node.appendChild method.  For cross-browser support,
     *     this method must be used instead of document.createTextNode.
     * 
     * Parameters:
     * text - {String} The text of the node.
     * 
     * Returns: 
     * {DOMElement} A DOM text node.
     */
    createTextNode: function(text) {
        var node;
        if (typeof text !== "string") {
            text = String(text);
        }
        if(this.xmldom) {
            node = this.xmldom.createTextNode(text);
        } else {
            node = document.createTextNode(text);
        }
        return node;
    },

    /**
     * APIMethod: getElementsByTagNameNS
     * Get a list of elements on a node given the namespace URI and local name.
     *     To return all nodes in a given namespace, use '*' for the name
     *     argument.  To return all nodes of a given (local) name, regardless
     *     of namespace, use '*' for the uri argument.
     * 
     * Parameters:
     * node - {Element} Node on which to search for other nodes.
     * uri - {String} Namespace URI.
     * name - {String} Local name of the tag (without the prefix).
     * 
     * Returns:
     * {NodeList} A node list or array of elements.
     */
    getElementsByTagNameNS: function(node, uri, name) {
        var elements = [];
        if(node.getElementsByTagNameNS) {
            elements = node.getElementsByTagNameNS(uri, name);
        } else {
            // brute force method
            var allNodes = node.getElementsByTagName("*");
            var potentialNode, fullName;
            for(var i=0, len=allNodes.length; i<len; ++i) {
                potentialNode = allNodes[i];
                fullName = (potentialNode.prefix) ?
                           (potentialNode.prefix + ":" + name) : name;
                if((name == "*") || (fullName == potentialNode.nodeName)) {
                    if((uri == "*") || (uri == potentialNode.namespaceURI)) {
                        elements.push(potentialNode);
                    }
                }
            }
        }
        return elements;
    },

    /**
     * APIMethod: getAttributeNodeNS
     * Get an attribute node given the namespace URI and local name.
     * 
     * Parameters:
     * node - {Element} Node on which to search for attribute nodes.
     * uri - {String} Namespace URI.
     * name - {String} Local name of the attribute (without the prefix).
     * 
     * Returns:
     * {DOMElement} An attribute node or null if none found.
     */
    getAttributeNodeNS: function(node, uri, name) {
        var attributeNode = null;
        if(node.getAttributeNodeNS) {
            attributeNode = node.getAttributeNodeNS(uri, name);
        } else {
            var attributes = node.attributes;
            var potentialNode, fullName;
            for(var i=0, len=attributes.length; i<len; ++i) {
                potentialNode = attributes[i];
                if(potentialNode.namespaceURI == uri) {
                    fullName = (potentialNode.prefix) ?
                               (potentialNode.prefix + ":" + name) : name;
                    if(fullName == potentialNode.nodeName) {
                        attributeNode = potentialNode;
                        break;
                    }
                }
            }
        }
        return attributeNode;
    },

    /**
     * APIMethod: getAttributeNS
     * Get an attribute value given the namespace URI and local name.
     * 
     * Parameters:
     * node - {Element} Node on which to search for an attribute.
     * uri - {String} Namespace URI.
     * name - {String} Local name of the attribute (without the prefix).
     * 
     * Returns:
     * {String} An attribute value or and empty string if none found.
     */
    getAttributeNS: function(node, uri, name) {
        var attributeValue = "";
        if(node.getAttributeNS) {
            attributeValue = node.getAttributeNS(uri, name) || "";
        } else {
            var attributeNode = this.getAttributeNodeNS(node, uri, name);
            if(attributeNode) {
                attributeValue = attributeNode.nodeValue;
            }
        }
        return attributeValue;
    },
    
    /**
     * APIMethod: getChildValue
     * Get the textual value of the node if it exists, or return an
     *     optional default string.  Returns an empty string if no first child
     *     exists and no default value is supplied.
     *
     * Parameters:
     * node - {DOMElement} The element used to look for a first child value.
     * def - {String} Optional string to return in the event that no
     *     first child value exists.
     *
     * Returns:
     * {String} The value of the first child of the given node.
     */
    getChildValue: function(node, def) {
        var value = def || "";
        if(node) {
            for(var child=node.firstChild; child; child=child.nextSibling) {
                switch(child.nodeType) {
                    case 3: // text node
                    case 4: // cdata section
                        value += child.nodeValue;
                }
            }
        }
        return value;
    },

    /**
     * APIMethod: isSimpleContent
     * Test if the given node has only simple content (i.e. no child element
     *     nodes).
     *
     * Parameters:
     * node - {DOMElement} An element node.
     *
     * Returns:
     * {Boolean} The node has no child element nodes (nodes of type 1). 
     */
    isSimpleContent: function(node) {
        var simple = true;
        for(var child=node.firstChild; child; child=child.nextSibling) {
            if(child.nodeType === 1) {
                simple = false;
                break;
            }
        }
        return simple;
    },
    
    /**
     * APIMethod: contentType
     * Determine the content type for a given node.
     *
     * Parameters:
     * node - {DOMElement}
     *
     * Returns:
     * {Integer} One of OpenLayers.Format.XML.CONTENT_TYPE.{EMPTY,SIMPLE,COMPLEX,MIXED}
     *     if the node has no, simple, complex, or mixed content.
     */
    contentType: function(node) {
        var simple = false,
            complex = false;
            
        var type = OpenLayers.Format.XML.CONTENT_TYPE.EMPTY;

        for(var child=node.firstChild; child; child=child.nextSibling) {
            switch(child.nodeType) {
                case 1: // element
                    complex = true;
                    break;
                case 8: // comment
                    break;
                default:
                    simple = true;
            }
            if(complex && simple) {
                break;
            }
        }
        
        if(complex && simple) {
            type = OpenLayers.Format.XML.CONTENT_TYPE.MIXED;
        } else if(complex) {
            return OpenLayers.Format.XML.CONTENT_TYPE.COMPLEX;
        } else if(simple) {
            return OpenLayers.Format.XML.CONTENT_TYPE.SIMPLE;
        }
        return type;
    },

    /**
     * APIMethod: hasAttributeNS
     * Determine whether a node has a particular attribute matching the given
     *     name and namespace.
     * 
     * Parameters:
     * node - {Element} Node on which to search for an attribute.
     * uri - {String} Namespace URI.
     * name - {String} Local name of the attribute (without the prefix).
     * 
     * Returns:
     * {Boolean} The node has an attribute matching the name and namespace.
     */
    hasAttributeNS: function(node, uri, name) {
        var found = false;
        if(node.hasAttributeNS) {
            found = node.hasAttributeNS(uri, name);
        } else {
            found = !!this.getAttributeNodeNS(node, uri, name);
        }
        return found;
    },
    
    /**
     * APIMethod: setAttributeNS
     * Adds a new attribute or changes the value of an attribute with the given
     *     namespace and name.
     *
     * Parameters:
     * node - {Element} Element node on which to set the attribute.
     * uri - {String} Namespace URI for the attribute.
     * name - {String} Qualified name (prefix:localname) for the attribute.
     * value - {String} Attribute value.
     */
    setAttributeNS: function(node, uri, name, value) {
        if(node.setAttributeNS) {
            node.setAttributeNS(uri, name, value);
        } else {
            if(this.xmldom) {
                if(uri) {
                    var attribute = node.ownerDocument.createNode(
                        2, name, uri
                    );
                    attribute.nodeValue = value;
                    node.setAttributeNode(attribute);
                } else {
                    node.setAttribute(name, value);
                }
            } else {
                throw "setAttributeNS not implemented";
            }
        }
    },

    /**
     * Method: createElementNSPlus
     * Shorthand for creating namespaced elements with optional attributes and
     *     child text nodes.
     *
     * Parameters:
     * name - {String} The qualified node name.
     * options - {Object} Optional object for node configuration.
     *
     * Valid options:
     * uri - {String} Optional namespace uri for the element - supply a prefix
     *     instead if the namespace uri is a property of the format's namespace
     *     object.
     * attributes - {Object} Optional attributes to be set using the
     *     <setAttributes> method.
     * value - {String} Optional text to be appended as a text node.
     *
     * Returns:
     * {Element} An element node.
     */
    createElementNSPlus: function(name, options) {
        options = options || {};
        // order of prefix preference
        // 1. in the uri option
        // 2. in the prefix option
        // 3. in the qualified name
        // 4. from the defaultPrefix
        var uri = options.uri || this.namespaces[options.prefix];
        if(!uri) {
            var loc = name.indexOf(":");
            uri = this.namespaces[name.substring(0, loc)];
        }
        if(!uri) {
            uri = this.namespaces[this.defaultPrefix];
        }
        var node = this.createElementNS(uri, name);
        if(options.attributes) {
            this.setAttributes(node, options.attributes);
        }
        var value = options.value;
        if(value != null) {
            node.appendChild(this.createTextNode(value));
        }
        return node;
    },
    
    /**
     * Method: setAttributes
     * Set multiple attributes given key value pairs from an object.
     *
     * Parameters:
     * node - {Element} An element node.
     * obj - {Object || Array} An object whose properties represent attribute
     *     names and values represent attribute values.  If an attribute name
     *     is a qualified name ("prefix:local"), the prefix will be looked up
     *     in the parsers {namespaces} object.  If the prefix is found,
     *     setAttributeNS will be used instead of setAttribute.
     */
    setAttributes: function(node, obj) {
        var value, uri;
        for(var name in obj) {
            if(obj[name] != null && obj[name].toString) {
                value = obj[name].toString();
                // check for qualified attribute name ("prefix:local")
                uri = this.namespaces[name.substring(0, name.indexOf(":"))] || null;
                this.setAttributeNS(node, uri, name, value);
            }
        }
    },

    /**
     * Method: readNode
     * Shorthand for applying one of the named readers given the node
     *     namespace and local name.  Readers take two args (node, obj) and
     *     generally extend or modify the second.
     *
     * Parameters:
     * node - {DOMElement} The node to be read (required).
     * obj - {Object} The object to be modified (optional).
     *
     * Returns:
     * {Object} The input object, modified (or a new one if none was provided).
     */
    readNode: function(node, obj) {
        if(!obj) {
            obj = {};
        }
        var group = this.readers[node.namespaceURI ? this.namespaceAlias[node.namespaceURI]: this.defaultPrefix];
        if(group) {
            var local = node.localName || node.nodeName.split(":").pop();
            var reader = group[local] || group["*"];
            if(reader) {
                reader.apply(this, [node, obj]);
            }
        }
        return obj;
    },

    /**
     * Method: readChildNodes
     * Shorthand for applying the named readers to all children of a node.
     *     For each child of type 1 (element), <readSelf> is called.
     *
     * Parameters:
     * node - {DOMElement} The node to be read (required).
     * obj - {Object} The object to be modified (optional).
     *
     * Returns:
     * {Object} The input object, modified.
     */
    readChildNodes: function(node, obj) {
        if(!obj) {
            obj = {};
        }
        var children = node.childNodes;
        var child;
        for(var i=0, len=children.length; i<len; ++i) {
            child = children[i];
            if(child.nodeType == 1) {
                this.readNode(child, obj);
            }
        }
        return obj;
    },

    /**
     * Method: writeNode
     * Shorthand for applying one of the named writers and appending the
     *     results to a node.  If a qualified name is not provided for the
     *     second argument (and a local name is used instead), the namespace
     *     of the parent node will be assumed.
     *
     * Parameters:
     * name - {String} The name of a node to generate.  If a qualified name
     *     (e.g. "pre:Name") is used, the namespace prefix is assumed to be
     *     in the <writers> group.  If a local name is used (e.g. "Name") then
     *     the namespace of the parent is assumed.  If a local name is used
     *     and no parent is supplied, then the default namespace is assumed.
     * obj - {Object} Structure containing data for the writer.
     * parent - {DOMElement} Result will be appended to this node.  If no parent
     *     is supplied, the node will not be appended to anything.
     *
     * Returns:
     * {DOMElement} The child node.
     */
    writeNode: function(name, obj, parent) {
        var prefix, local;
        var split = name.indexOf(":");
        if(split > 0) {
            prefix = name.substring(0, split);
            local = name.substring(split + 1);
        } else {
            if(parent) {
                prefix = this.namespaceAlias[parent.namespaceURI];
            } else {
                prefix = this.defaultPrefix;
            }
            local = name;
        }
        var child = this.writers[prefix][local].apply(this, [obj]);
        if(parent) {
            parent.appendChild(child);
        }
        return child;
    },

    /**
     * APIMethod: getChildEl
     * Get the first child element.  Optionally only return the first child
     *     if it matches the given name and namespace URI.
     *
     * Parameters:
     * node - {DOMElement} The parent node.
     * name - {String} Optional node name (local) to search for.
     * uri - {String} Optional namespace URI to search for.
     *
     * Returns:
     * {DOMElement} The first child.  Returns null if no element is found, if
     *     something significant besides an element is found, or if the element
     *     found does not match the optional name and uri.
     */
    getChildEl: function(node, name, uri) {
        return node && this.getThisOrNextEl(node.firstChild, name, uri);
    },
    
    /**
     * APIMethod: getNextEl
     * Get the next sibling element.  Optionally get the first sibling only
     *     if it matches the given local name and namespace URI.
     *
     * Parameters:
     * node - {DOMElement} The node.
     * name - {String} Optional local name of the sibling to search for.
     * uri - {String} Optional namespace URI of the sibling to search for.
     *
     * Returns:
     * {DOMElement} The next sibling element.  Returns null if no element is
     *     found, something significant besides an element is found, or the
     *     found element does not match the optional name and uri.
     */
    getNextEl: function(node, name, uri) {
        return node && this.getThisOrNextEl(node.nextSibling, name, uri);
    },
    
    /**
     * Method: getThisOrNextEl
     * Return this node or the next element node.  Optionally get the first
     *     sibling with the given local name or namespace URI.
     *
     * Parameters:
     * node - {DOMElement} The node.
     * name - {String} Optional local name of the sibling to search for.
     * uri - {String} Optional namespace URI of the sibling to search for.
     *
     * Returns:
     * {DOMElement} The next sibling element.  Returns null if no element is
     *     found, something significant besides an element is found, or the
     *     found element does not match the query.
     */
    getThisOrNextEl: function(node, name, uri) {
        outer: for(var sibling=node; sibling; sibling=sibling.nextSibling) {
            switch(sibling.nodeType) {
                case 1: // Element
                    if((!name || name === (sibling.localName || sibling.nodeName.split(":").pop())) &&
                       (!uri || uri === sibling.namespaceURI)) {
                        // matches
                        break outer;
                    }
                    sibling = null;
                    break outer;
                case 3: // Text
                    if(/^\s*$/.test(sibling.nodeValue)) {
                        break;
                    }
                case 4: // CDATA
                case 6: // ENTITY_NODE
                case 12: // NOTATION_NODE
                case 10: // DOCUMENT_TYPE_NODE
                case 11: // DOCUMENT_FRAGMENT_NODE
                    sibling = null;
                    break outer;
            } // ignore comments and processing instructions
        }
        return sibling || null;
    },
    
    /**
     * APIMethod: lookupNamespaceURI
     * Takes a prefix and returns the namespace URI associated with it on the given
     *     node if found (and null if not). Supplying null for the prefix will
     *     return the default namespace.
     *
     * For browsers that support it, this calls the native lookupNamesapceURI
     *     function.  In other browsers, this is an implementation of
     *     http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespaceURI.
     *
     * For browsers that don't support the attribute.ownerElement property, this
     *     method cannot be called on attribute nodes.
     *     
     * Parameters:
     * node - {DOMElement} The node from which to start looking.
     * prefix - {String} The prefix to lookup or null to lookup the default namespace.
     * 
     * Returns:
     * {String} The namespace URI for the given prefix.  Returns null if the prefix
     *     cannot be found or the node is the wrong type.
     */
    lookupNamespaceURI: function(node, prefix) {
        var uri = null;
        if(node) {
            if(node.lookupNamespaceURI) {
                uri = node.lookupNamespaceURI(prefix);
            } else {
                outer: switch(node.nodeType) {
                    case 1: // ELEMENT_NODE
                        if(node.namespaceURI !== null && node.prefix === prefix) {
                            uri = node.namespaceURI;
                            break outer;
                        }
                        var len = node.attributes.length;
                        if(len) {
                            var attr;
                            for(var i=0; i<len; ++i) {
                                attr = node.attributes[i];
                                if(attr.prefix === "xmlns" && attr.name === "xmlns:" + prefix) {
                                    uri = attr.value || null;
                                    break outer;
                                } else if(attr.name === "xmlns" && prefix === null) {
                                    uri = attr.value || null;
                                    break outer;
                                }
                            }
                        }
                        uri = this.lookupNamespaceURI(node.parentNode, prefix);
                        break outer;
                    case 2: // ATTRIBUTE_NODE
                        uri = this.lookupNamespaceURI(node.ownerElement, prefix);
                        break outer;
                    case 9: // DOCUMENT_NODE
                        uri = this.lookupNamespaceURI(node.documentElement, prefix);
                        break outer;
                    case 6: // ENTITY_NODE
                    case 12: // NOTATION_NODE
                    case 10: // DOCUMENT_TYPE_NODE
                    case 11: // DOCUMENT_FRAGMENT_NODE
                        break outer;
                    default: 
                        // TEXT_NODE (3), CDATA_SECTION_NODE (4), ENTITY_REFERENCE_NODE (5),
                        // PROCESSING_INSTRUCTION_NODE (7), COMMENT_NODE (8)
                        uri =  this.lookupNamespaceURI(node.parentNode, prefix);
                        break outer;
                }
            }
        }
        return uri;
    },
    
    /**
     * Method: getXMLDoc
     * Get an XML document for nodes that are not supported in HTML (e.g.
     * createCDATASection). On IE, this will either return an existing or
     * create a new <xmldom> on the instance. On other browsers, this will
     * either return an existing or create a new shared document (see
     * <OpenLayers.Format.XML.document>).
     *
     * Returns:
     * {XMLDocument}
     */
    getXMLDoc: function() {
        if (!OpenLayers.Format.XML.document && !this.xmldom) {
            if (document.implementation && document.implementation.createDocument) {
                OpenLayers.Format.XML.document =
                    document.implementation.createDocument("", "", null);
            } else if (!this.xmldom && window.ActiveXObject) {
                this.xmldom = new ActiveXObject("Microsoft.XMLDOM");
            }
        }
        return OpenLayers.Format.XML.document || this.xmldom;
    },

    CLASS_NAME: "OpenLayers.Format.XML" 

});     

OpenLayers.Format.XML.CONTENT_TYPE = {EMPTY: 0, SIMPLE: 1, COMPLEX: 2, MIXED: 3};

/**
 * APIFunction: OpenLayers.Format.XML.lookupNamespaceURI
 * Takes a prefix and returns the namespace URI associated with it on the given
 *     node if found (and null if not). Supplying null for the prefix will
 *     return the default namespace.
 *
 * For browsers that support it, this calls the native lookupNamesapceURI
 *     function.  In other browsers, this is an implementation of
 *     http://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespaceURI.
 *
 * For browsers that don't support the attribute.ownerElement property, this
 *     method cannot be called on attribute nodes.
 *     
 * Parameters:
 * node - {DOMElement} The node from which to start looking.
 * prefix - {String} The prefix to lookup or null to lookup the default namespace.
 * 
 * Returns:
 * {String} The namespace URI for the given prefix.  Returns null if the prefix
 *     cannot be found or the node is the wrong type.
 */
OpenLayers.Format.XML.lookupNamespaceURI = OpenLayers.Function.bind(
    OpenLayers.Format.XML.prototype.lookupNamespaceURI,
    OpenLayers.Format.XML.prototype
);

/**
 * Property: OpenLayers.Format.XML.document
 * {XMLDocument} XML document to reuse for creating non-HTML compliant nodes,
 * like document.createCDATASection.
 */
OpenLayers.Format.XML.document = null;
/* ======================================================================
    OpenLayers/Format/WFST.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format.js
 */

/**
 * Function: OpenLayers.Format.WFST
 * Used to create a versioned WFS protocol.  Default version is 1.0.0.
 *
 * Returns:
 * {<OpenLayers.Format>} A WFST format of the given version.
 */
OpenLayers.Format.WFST = function(options) {
    options = OpenLayers.Util.applyDefaults(
        options, OpenLayers.Format.WFST.DEFAULTS
    );
    var cls = OpenLayers.Format.WFST["v"+options.version.replace(/\./g, "_")];
    if(!cls) {
        throw "Unsupported WFST version: " + options.version;
    }
    return new cls(options);
};

/**
 * Constant: OpenLayers.Format.WFST.DEFAULTS
 * {Object} Default properties for the WFST format.
 */
OpenLayers.Format.WFST.DEFAULTS = {
    "version": "1.0.0"
};
/* ======================================================================
    OpenLayers/Format/WFST/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/WFST.js
 */

/**
 * Class: OpenLayers.Format.WFST.v1
 * Superclass for WFST parsers.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WFST.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance",
        wfs: "http://www.opengis.net/wfs",
        gml: "http://www.opengis.net/gml",
        ogc: "http://www.opengis.net/ogc",
        ows: "http://www.opengis.net/ows"
    },
    
    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "wfs",

    /**
     * Property: version
     * {String} WFS version number.
     */
    version: null,

    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocations: null,
    
    /**
     * APIProperty: srsName
     * {String} URI for spatial reference system.
     */
    srsName: null,

    /**
     * APIProperty: extractAttributes
     * {Boolean} Extract attributes from GML.  Default is true.
     */
    extractAttributes: true,
    
    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
     * Changing is not recommended, a new Format should be instantiated.
     */ 
    xy: true,

    /**
     * Property: stateName
     * {Object} Maps feature states to node names.
     */
    stateName: null,
    
    /**
     * Constructor: OpenLayers.Format.WFST.v1
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.WFST.v1_0_0> or <OpenLayers.Format.WFST.v1_1_0>
     *     constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        // set state name mapping
        this.stateName = {};
        this.stateName[OpenLayers.State.INSERT] = "wfs:Insert";
        this.stateName[OpenLayers.State.UPDATE] = "wfs:Update";
        this.stateName[OpenLayers.State.DELETE] = "wfs:Delete";
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * Method: getSrsName
     */
    getSrsName: function(feature, options) {
        var srsName = options && options.srsName;
        if(!srsName) {
            if(feature && feature.layer) {
                srsName = feature.layer.projection.getCode();
            } else {
                srsName = this.srsName;
            }
        }
        return srsName;
    },

    /**
     * APIMethod: read
     * Parse the response from a transaction.  Because WFS is split into
     *     Transaction requests (create, update, and delete) and GetFeature
     *     requests (read), this method handles parsing of both types of
     *     responses.
     *
     * Parameters:
     * data - {String | Document} The WFST document to read
     * options - {Object} Options for the reader
     *
     * Valid options properties:
     * output - {String} either "features" or "object". The default is
     *     "features", which means that the method will return an array of
     *     features. If set to "object", an object with a "features" property
     *     and other properties read by the parser will be returned.
     *
     * Returns:
     * {Array | Object} Output depending on the output option.
     */
    read: function(data, options) {
        options = options || {};
        OpenLayers.Util.applyDefaults(options, {
            output: "features"
        });
        
        if(typeof data == "string") { 
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var obj = {};
        if(data) {
            this.readNode(data, obj, true);
        }
        if(obj.features && options.output === "features") {
            obj = obj.features;
        }
        return obj;
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wfs": {
            "FeatureCollection": function(node, obj) {
                obj.features = [];
                this.readChildNodes(node, obj);
            }
        }
    },
    
    /**
     * Method: write
     * Given an array of features, write a WFS transaction.  This assumes
     *     the features have a state property that determines the operation
     *     type - insert, update, or delete.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} A list of features. See
     *     below for a more detailed description of the influence of the
     *     feature's *modified* property.
     * options - {Object}
     *
     * feature.modified rules:
     * If a feature has a modified property set, the following checks will be
     * made before a feature's geometry or attribute is included in an Update
     * transaction:
     * - *modified* is not set at all: The geometry and all attributes will be
     *     included.
     * - *modified.geometry* is set (null or a geometry): The geometry will be
     *     included. If *modified.attributes* is not set, all attributes will
     *     be included.
     * - *modified.attributes* is set: Only the attributes set (i.e. to null or
     *     a value) in *modified.attributes* will be included. 
     *     If *modified.geometry* is not set, the geometry will not be included.
     *
     * Valid options include:
     * - *multi* {Boolean} If set to true, geometries will be casted to
     *   Multi geometries before writing.
     *
     * Returns:
     * {String} A serialized WFS transaction.
     */
    write: function(features, options) {
        var node = this.writeNode("wfs:Transaction", {
            features:features,
            options: options
        });
        var value = this.schemaLocationAttr();
        if(value) {
            this.setAttributeNS(
                node, this.namespaces["xsi"], "xsi:schemaLocation",  value
            );
        }
        return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
    },
    
    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "wfs": {
            "GetFeature": function(options) {
                var node = this.createElementNSPlus("wfs:GetFeature", {
                    attributes: {
                        service: "WFS",
                        version: this.version,
                        handle: options && options.handle,
                        outputFormat: options && options.outputFormat,
                        maxFeatures: options && options.maxFeatures,
                        "xsi:schemaLocation": this.schemaLocationAttr(options)
                    }
                });
                if (typeof this.featureType == "string") {
                    this.writeNode("Query", options, node);
                } else {
                    for (var i=0,len = this.featureType.length; i<len; i++) { 
                        options.featureType = this.featureType[i]; 
                        this.writeNode("Query", options, node); 
                    } 
                }
                return node;
            },
            "Transaction": function(obj) {
                obj = obj || {};
                var options = obj.options || {};
                var node = this.createElementNSPlus("wfs:Transaction", {
                    attributes: {
                        service: "WFS",
                        version: this.version,
                        handle: options.handle
                    }
                });
                var i, len;
                var features = obj.features;
                if(features) {
                    // temporarily re-assigning geometry types
                    if (options.multi === true) {
                        OpenLayers.Util.extend(this.geometryTypes, {
                            "OpenLayers.Geometry.Point": "MultiPoint",
                            "OpenLayers.Geometry.LineString": (this.multiCurve === true) ? "MultiCurve": "MultiLineString",
                            "OpenLayers.Geometry.Polygon": (this.multiSurface === true) ? "MultiSurface" : "MultiPolygon"
                        });
                    }
                    var name, feature;
                    for(i=0, len=features.length; i<len; ++i) {
                        feature = features[i];
                        name = this.stateName[feature.state];
                        if(name) {
                            this.writeNode(name, {
                                feature: feature, 
                                options: options
                            }, node);
                        }
                    }
                    // switch back to original geometry types assignment
                    if (options.multi === true) {
                        this.setGeometryTypes();
                    }
                }
                if (options.nativeElements) {
                    for (i=0, len=options.nativeElements.length; i<len; ++i) {
                        this.writeNode("wfs:Native", 
                            options.nativeElements[i], node);
                    }
                }
                return node;
            },
            "Native": function(nativeElement) {
                var node = this.createElementNSPlus("wfs:Native", {
                    attributes: {
                        vendorId: nativeElement.vendorId,
                        safeToIgnore: nativeElement.safeToIgnore
                    },
                    value: nativeElement.value
                });
                return node;
            },
            "Insert": function(obj) {
                var feature = obj.feature;
                var options = obj.options;
                var node = this.createElementNSPlus("wfs:Insert", {
                    attributes: {
                        handle: options && options.handle
                    }
                });
                this.srsName = this.getSrsName(feature);
                this.writeNode("feature:_typeName", feature, node);
                return node;
            },
            "Update": function(obj) {
                var feature = obj.feature;
                var options = obj.options;
                var node = this.createElementNSPlus("wfs:Update", {
                    attributes: {
                        handle: options && options.handle,
                        typeName: (this.featureNS ? this.featurePrefix + ":" : "") +
                            this.featureType
                    }
                });
                if(this.featureNS) {
                    node.setAttribute("xmlns:" + this.featurePrefix, this.featureNS);
                }
                
                // add in geometry
                var modified = feature.modified;
                if (this.geometryName !== null && (!modified || modified.geometry !== undefined)) {
                    this.srsName = this.getSrsName(feature);
                    this.writeNode(
                        "Property", {name: this.geometryName, value: feature.geometry}, node
                    );
                }
        
                // add in attributes
                for(var key in feature.attributes) {
                    if(feature.attributes[key] !== undefined &&
                                (!modified || !modified.attributes ||
                                (modified.attributes && modified.attributes[key] !== undefined))) {
                        this.writeNode(
                            "Property", {name: key, value: feature.attributes[key]}, node
                        );
                    }
                }
                
                // add feature id filter
                this.writeNode("ogc:Filter", new OpenLayers.Filter.FeatureId({
                    fids: [feature.fid]
                }), node);
        
                return node;
            },
            "Property": function(obj) {
                var node = this.createElementNSPlus("wfs:Property");
                this.writeNode("Name", obj.name, node);
                if(obj.value !== null) {
                    this.writeNode("Value", obj.value, node);
                }
                return node;
            },
            "Name": function(name) {
                return this.createElementNSPlus("wfs:Name", {value: name});
            },
            "Value": function(obj) {
                var node;
                if(obj instanceof OpenLayers.Geometry) {
                    node = this.createElementNSPlus("wfs:Value");
                    var geom = this.writeNode("feature:_geometry", obj).firstChild;
                    node.appendChild(geom);
                } else {
                    node = this.createElementNSPlus("wfs:Value", {value: obj});                
                }
                return node;
            },
            "Delete": function(obj) {
                var feature = obj.feature;
                var options = obj.options;
                var node = this.createElementNSPlus("wfs:Delete", {
                    attributes: {
                        handle: options && options.handle,
                        typeName: (this.featureNS ? this.featurePrefix + ":" : "") +
                            this.featureType
                    }
                });
                if(this.featureNS) {
                    node.setAttribute("xmlns:" + this.featurePrefix, this.featureNS);
                }
                this.writeNode("ogc:Filter", new OpenLayers.Filter.FeatureId({
                    fids: [feature.fid]
                }), node);
                return node;
            }
        }
    },

    /**
     * Method: schemaLocationAttr
     * Generate the xsi:schemaLocation attribute value.
     *
     * Returns:
     * {String} The xsi:schemaLocation attribute or undefined if none.
     */
    schemaLocationAttr: function(options) {
        options = OpenLayers.Util.extend({
            featurePrefix: this.featurePrefix,
            schema: this.schema
        }, options);
        var schemaLocations = OpenLayers.Util.extend({}, this.schemaLocations);
        if(options.schema) {
            schemaLocations[options.featurePrefix] = options.schema;
        }
        var parts = [];
        var uri;
        for(var key in schemaLocations) {
            uri = this.namespaces[key];
            if(uri) {
                parts.push(uri + " " + schemaLocations[key]);
            }
        }
        var value = parts.join(" ") || undefined;
        return value;
    },
    
    /**
     * Method: setFilterProperty
     * Set the property of each spatial filter.
     *
     * Parameters:
     * filter - {<OpenLayers.Filter>}
     */
    setFilterProperty: function(filter) {
        if(filter.filters) {
            for(var i=0, len=filter.filters.length; i<len; ++i) {
                OpenLayers.Format.WFST.v1.prototype.setFilterProperty.call(this, filter.filters[i]);
            }
        } else {
            if(filter instanceof OpenLayers.Filter.Spatial && !filter.property) {
                // got a spatial filter without property, so set it
                filter.property = this.geometryName;
            }
        }
    },

    CLASS_NAME: "OpenLayers.Format.WFST.v1" 

});
/* ======================================================================
    OpenLayers/Format/OGCExceptionReport.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 */

/**
 * Class: OpenLayers.Format.OGCExceptionReport
 * Class to read exception reports for various OGC services and versions.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.OGCExceptionReport = OpenLayers.Class(OpenLayers.Format.XML, {

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ogc: "http://www.opengis.net/ogc"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "ogc",

    /**
     * Constructor: OpenLayers.Format.OGCExceptionReport
     * Create a new parser for OGC exception reports.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read OGC exception report data from a string, and return an object with
     * information about the exceptions.
     *
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Information about the exceptions that occurred.
     */
    read: function(data) {
        var result;
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var root = data.documentElement;
        var exceptionInfo = {exceptionReport: null}; 
        if (root) {
            this.readChildNodes(data, exceptionInfo);
            if (exceptionInfo.exceptionReport === null) {
                // fall-back to OWSCommon since this is a common output format for exceptions
                // we cannot easily use the ows readers directly since they differ for 1.0 and 1.1
                exceptionInfo = new OpenLayers.Format.OWSCommon().read(data);
            }
        }
        return exceptionInfo;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ogc": {
            "ServiceExceptionReport": function(node, obj) {
                obj.exceptionReport = {exceptions: []};
                this.readChildNodes(node, obj.exceptionReport);
            },
            "ServiceException": function(node, exceptionReport) {
                var exception = {
                    code: node.getAttribute("code"),
                    locator: node.getAttribute("locator"),
                    text: this.getChildValue(node)
                };
                exceptionReport.exceptions.push(exception);
            }
        }
    },
    
    CLASS_NAME: "OpenLayers.Format.OGCExceptionReport"
    
});
/* ======================================================================
    OpenLayers/Format/XML/VersionedOGC.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/OGCExceptionReport.js
 */

/**
 * Class: OpenLayers.Format.XML.VersionedOGC
 * Base class for versioned formats, i.e. a format which supports multiple
 * versions.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.XML.VersionedOGC = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.
     */
    defaultVersion: null,
    
    /**
     * APIProperty: version
     * {String} Specify a version string if one is known.
     */
    version: null,

    /**
     * APIProperty: profile
     * {String} If provided, use a custom profile.
     */
    profile: null,

    /**
     * APIProperty: errorProperty
     * {String} Which property of the returned object to check for in order to
     * determine whether or not parsing has failed. In the case that the
     * errorProperty is undefined on the returned object, the document will be
     * run through an OGCExceptionReport parser.
     */
    errorProperty: null,

    /**
     * Property: name
     * {String} The name of this parser, this is the part of the CLASS_NAME
     * except for "OpenLayers.Format."
     */
    name: null,

    /**
     * APIProperty: stringifyOutput
     * {Boolean} If true, write will return a string otherwise a DOMElement.
     * Default is false.
     */
    stringifyOutput: false,

    /**
     * Property: parser
     * {Object} Instance of the versioned parser.  Cached for multiple read and
     *     write calls of the same version.
     */
    parser: null,

    /**
     * Constructor: OpenLayers.Format.XML.VersionedOGC.
     * Constructor.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on
     *     the object.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
        var className = this.CLASS_NAME;
        this.name = className.substring(className.lastIndexOf(".")+1);
    },

    /**
     * Method: getVersion
     * Returns the version to use. Subclasses can override this function
     * if a different version detection is needed.
     *
     * Parameters:
     * root - {DOMElement}
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} The version to use.
     */
    getVersion: function(root, options) {
        var version;
        // read
        if (root) {
            version = this.version;
            if(!version) {
                version = root.getAttribute("version");
                if(!version) {
                    version = this.defaultVersion;
                }
            }
        } else { // write
            version = (options && options.version) || 
                this.version || this.defaultVersion;
        }
        return version;
    },

    /**
     * Method: getParser
     * Get an instance of the cached parser if available, otherwise create one.
     *
     * Parameters:
     * version - {String}
     *
     * Returns:
     * {<OpenLayers.Format>}
     */
    getParser: function(version) {
        version = version || this.defaultVersion;
        var profile = this.profile ? "_" + this.profile : "";
        if(!this.parser || this.parser.VERSION != version) {
            var format = OpenLayers.Format[this.name][
                "v" + version.replace(/\./g, "_") + profile
            ];
            if(!format) {
                throw "Can't find a " + this.name + " parser for version " +
                      version + profile;
            }
            this.parser = new format(this.options);
        }
        return this.parser;
    },

    /**
     * APIMethod: write
     * Write a document.
     *
     * Parameters:
     * obj - {Object} An object representing the document.
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} The document as a string
     */
    write: function(obj, options) {
        var version = this.getVersion(null, options);
        this.parser = this.getParser(version);
        var root = this.parser.write(obj, options);
        if (this.stringifyOutput === false) {
            return root;
        } else {
            return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
        }
    },

    /**
     * APIMethod: read
     * Read a doc and return an object representing the document.
     *
     * Parameters:
     * data - {String | DOMElement} Data to read.
     * options - {Object} Options for the reader.
     *
     * Returns:
     * {Object} An object representing the document.
     */
    read: function(data, options) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var root = data.documentElement;
        var version = this.getVersion(root);
        this.parser = this.getParser(version);
        var obj = this.parser.read(data, options);
        if (this.errorProperty !== null && obj[this.errorProperty] === undefined) {
            // an error must have happened, so parse it and report back
            var format = new OpenLayers.Format.OGCExceptionReport();
            obj.error = format.read(data);
        }
        obj.version = version;
        return obj;
    },

    CLASS_NAME: "OpenLayers.Format.XML.VersionedOGC"
});
/* ======================================================================
    OpenLayers/Feature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 */

/**
 * Class: OpenLayers.Feature
 * Features are combinations of geography and attributes. The OpenLayers.Feature
 *     class specifically combines a marker and a lonlat.
 */
OpenLayers.Feature = OpenLayers.Class({

    /** 
     * Property: layer 
     * {<OpenLayers.Layer>} 
     */
    layer: null,

    /** 
     * Property: id 
     * {String} 
     */
    id: null,
    
    /** 
     * Property: lonlat 
     * {<OpenLayers.LonLat>} 
     */
    lonlat: null,

    /** 
     * Property: data 
     * {Object} 
     */
    data: null,

    /** 
     * Property: marker 
     * {<OpenLayers.Marker>} 
     */
    marker: null,

    /**
     * APIProperty: popupClass
     * {<OpenLayers.Class>} The class which will be used to instantiate
     *     a new Popup. Default is <OpenLayers.Popup.Anchored>.
     */
    popupClass: null,

    /** 
     * Property: popup 
     * {<OpenLayers.Popup>} 
     */
    popup: null,

    /** 
     * Constructor: OpenLayers.Feature
     * Constructor for features.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer>} 
     * lonlat - {<OpenLayers.LonLat>} 
     * data - {Object} 
     * 
     * Returns:
     * {<OpenLayers.Feature>}
     */
    initialize: function(layer, lonlat, data) {
        this.layer = layer;
        this.lonlat = lonlat;
        this.data = (data != null) ? data : {};
        this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_"); 
    },

    /** 
     * Method: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {

        //remove the popup from the map
        if ((this.layer != null) && (this.layer.map != null)) {
            if (this.popup != null) {
                this.layer.map.removePopup(this.popup);
            }
        }
        // remove the marker from the layer
        if (this.layer != null && this.marker != null) {
            this.layer.removeMarker(this.marker);
        }

        this.layer = null;
        this.id = null;
        this.lonlat = null;
        this.data = null;
        if (this.marker != null) {
            this.destroyMarker(this.marker);
            this.marker = null;
        }
        if (this.popup != null) {
            this.destroyPopup(this.popup);
            this.popup = null;
        }
    },
    
    /**
     * Method: onScreen
     * 
     * Returns:
     * {Boolean} Whether or not the feature is currently visible on screen
     *           (based on its 'lonlat' property)
     */
    onScreen:function() {
        
        var onScreen = false;
        if ((this.layer != null) && (this.layer.map != null)) {
            var screenBounds = this.layer.map.getExtent();
            onScreen = screenBounds.containsLonLat(this.lonlat);
        }    
        return onScreen;
    },
    

    /**
     * Method: createMarker
     * Based on the data associated with the Feature, create and return a marker object.
     *
     * Returns: 
     * {<OpenLayers.Marker>} A Marker Object created from the 'lonlat' and 'icon' properties
     *          set in this.data. If no 'lonlat' is set, returns null. If no
     *          'icon' is set, OpenLayers.Marker() will load the default image.
     *          
     *          Note - this.marker is set to return value
     * 
     */
    createMarker: function() {

        if (this.lonlat != null) {
            this.marker = new OpenLayers.Marker(this.lonlat, this.data.icon);
        }
        return this.marker;
    },

    /**
     * Method: destroyMarker
     * Destroys marker.
     * If user overrides the createMarker() function, s/he should be able
     *   to also specify an alternative function for destroying it
     */
    destroyMarker: function() {
        this.marker.destroy();  
    },

    /**
     * Method: createPopup
     * Creates a popup object created from the 'lonlat', 'popupSize',
     *     and 'popupContentHTML' properties set in this.data. It uses
     *     this.marker.icon as default anchor. 
     *  
     *  If no 'lonlat' is set, returns null. 
     *  If no this.marker has been created, no anchor is sent.
     *
     *  Note - the returned popup object is 'owned' by the feature, so you
     *      cannot use the popup's destroy method to discard the popup.
     *      Instead, you must use the feature's destroyPopup
     * 
     *  Note - this.popup is set to return value
     * 
     * Parameters: 
     * closeBox - {Boolean} create popup with closebox or not
     * 
     * Returns:
     * {<OpenLayers.Popup>} Returns the created popup, which is also set
     *     as 'popup' property of this feature. Will be of whatever type
     *     specified by this feature's 'popupClass' property, but must be
     *     of type <OpenLayers.Popup>.
     * 
     */
    createPopup: function(closeBox) {

        if (this.lonlat != null) {
            if (!this.popup) {
                var anchor = (this.marker) ? this.marker.icon : null;
                var popupClass = this.popupClass ? 
                    this.popupClass : OpenLayers.Popup.Anchored;
                this.popup = new popupClass(this.id + "_popup", 
                                            this.lonlat,
                                            this.data.popupSize,
                                            this.data.popupContentHTML,
                                            anchor, 
                                            closeBox); 
            }    
            if (this.data.overflow != null) {
                this.popup.contentDiv.style.overflow = this.data.overflow;
            }    
            
            this.popup.feature = this;
        }        
        return this.popup;
    },

    
    /**
     * Method: destroyPopup
     * Destroys the popup created via createPopup.
     *
     * As with the marker, if user overrides the createPopup() function, s/he 
     *   should also be able to override the destruction
     */
    destroyPopup: function() {
        if (this.popup) {
            this.popup.feature = null;
            this.popup.destroy();
            this.popup = null;
        }    
    },

    CLASS_NAME: "OpenLayers.Feature"
});
/* ======================================================================
    OpenLayers/Feature/Vector.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

// TRASH THIS
OpenLayers.State = {
    /** states */
    UNKNOWN: 'Unknown',
    INSERT: 'Insert',
    UPDATE: 'Update',
    DELETE: 'Delete'
};

/**
 * @requires OpenLayers/Feature.js
 * @requires OpenLayers/Util.js
 */

/**
 * Class: OpenLayers.Feature.Vector
 * Vector features use the OpenLayers.Geometry classes as geometry description.
 * They have an 'attributes' property, which is the data object, and a 'style'
 * property, the default values of which are defined in the 
 * <OpenLayers.Feature.Vector.style> objects.
 * 
 * Inherits from:
 *  - <OpenLayers.Feature>
 */
OpenLayers.Feature.Vector = OpenLayers.Class(OpenLayers.Feature, {

    /** 
     * Property: fid 
     * {String} 
     */
    fid: null,
    
    /** 
     * APIProperty: geometry 
     * {<OpenLayers.Geometry>} 
     */
    geometry: null,

    /** 
     * APIProperty: attributes 
     * {Object} This object holds arbitrary, serializable properties that
     *     describe the feature.
     */
    attributes: null,

    /**
     * Property: bounds
     * {<OpenLayers.Bounds>} The box bounding that feature's geometry, that
     *     property can be set by an <OpenLayers.Format> object when
     *     deserializing the feature, so in most cases it represents an
     *     information set by the server. 
     */
    bounds: null,

    /** 
     * Property: state 
     * {String} 
     */
    state: null,
    
    /** 
     * APIProperty: style 
     * {Object} 
     */
    style: null,

    /**
     * APIProperty: url
     * {String} If this property is set it will be taken into account by
     *     {<OpenLayers.HTTP>} when upadting or deleting the feature.
     */
    url: null,
    
    /**
     * Property: renderIntent
     * {String} rendering intent currently being used
     */
    renderIntent: "default",
    
    /**
     * APIProperty: modified
     * {Object} An object with the originals of the geometry and attributes of
     * the feature, if they were changed. Currently this property is only read
     * by <OpenLayers.Format.WFST.v1>, and written by
     * <OpenLayers.Control.ModifyFeature>, which sets the geometry property.
     * Applications can set the originals of modified attributes in the
     * attributes property. Note that applications have to check if this
     * object and the attributes property is already created before using it.
     * After a change made with ModifyFeature, this object could look like
     *
     * (code)
     * {
     *     geometry: >Object
     * }
     * (end)
     *
     * When an application has made changes to feature attributes, it could
     * have set the attributes to something like this:
     *
     * (code)
     * {
     *     attributes: {
     *         myAttribute: "original"
     *     }
     * }
     * (end)
     *
     * Note that <OpenLayers.Format.WFST.v1> only checks for truthy values in
     * *modified.geometry* and the attribute names in *modified.attributes*,
     * but it is recommended to set the original values (and not just true) as
     * attribute value, so applications could use this information to undo
     * changes.
     */
    modified: null,

    /** 
     * Constructor: OpenLayers.Feature.Vector
     * Create a vector feature. 
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The geometry that this feature
     *     represents.
     * attributes - {Object} An optional object that will be mapped to the
     *     <attributes> property. 
     * style - {Object} An optional style object.
     */
    initialize: function(geometry, attributes, style) {
        OpenLayers.Feature.prototype.initialize.apply(this,
                                                      [null, null, attributes]);
        this.lonlat = null;
        this.geometry = geometry ? geometry : null;
        this.state = null;
        this.attributes = {};
        if (attributes) {
            this.attributes = OpenLayers.Util.extend(this.attributes,
                                                     attributes);
        }
        this.style = style ? style : null; 
    },
    
    /** 
     * Method: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {
        if (this.layer) {
            this.layer.removeFeatures(this);
            this.layer = null;
        }
            
        this.geometry = null;
        this.modified = null;
        OpenLayers.Feature.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: clone
     * Create a clone of this vector feature.  Does not set any non-standard
     *     properties.
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} An exact clone of this vector feature.
     */
    clone: function () {
        return new OpenLayers.Feature.Vector(
            this.geometry ? this.geometry.clone() : null,
            this.attributes,
            this.style);
    },

    /**
     * Method: onScreen
     * Determine whether the feature is within the map viewport.  This method
     *     tests for an intersection between the geometry and the viewport
     *     bounds.  If a more effecient but less precise geometry bounds
     *     intersection is desired, call the method with the boundsOnly
     *     parameter true.
     *
     * Parameters:
     * boundsOnly - {Boolean} Only test whether a feature's bounds intersects
     *     the viewport bounds.  Default is false.  If false, the feature's
     *     geometry must intersect the viewport for onScreen to return true.
     * 
     * Returns:
     * {Boolean} The feature is currently visible on screen (optionally
     *     based on its bounds if boundsOnly is true).
     */
    onScreen:function(boundsOnly) {
        var onScreen = false;
        if(this.layer && this.layer.map) {
            var screenBounds = this.layer.map.getExtent();
            if(boundsOnly) {
                var featureBounds = this.geometry.getBounds();
                onScreen = screenBounds.intersectsBounds(featureBounds);
            } else {
                var screenPoly = screenBounds.toGeometry();
                onScreen = screenPoly.intersects(this.geometry);
            }
        }    
        return onScreen;
    },

    /**
     * Method: getVisibility
     * Determine whether the feature is displayed or not. It may not displayed
     *     because:
     *     - its style display property is set to 'none',
     *     - it doesn't belong to any layer,
     *     - the styleMap creates a symbolizer with display property set to 'none'
     *          for it,
     *     - the layer which it belongs to is not visible.
     * 
     * Returns:
     * {Boolean} The feature is currently displayed.
     */
    getVisibility: function() {
        return !(this.style && this.style.display == 'none' ||
                 !this.layer ||
                 this.layer && this.layer.styleMap &&
                 this.layer.styleMap.createSymbolizer(this, this.renderIntent).display == 'none' ||
                 this.layer && !this.layer.getVisibility());
    },
    
    /**
     * Method: createMarker
     * HACK - we need to decide if all vector features should be able to
     *     create markers
     * 
     * Returns:
     * {<OpenLayers.Marker>} For now just returns null
     */
    createMarker: function() {
        return null;
    },

    /**
     * Method: destroyMarker
     * HACK - we need to decide if all vector features should be able to
     *     delete markers
     * 
     * If user overrides the createMarker() function, s/he should be able
     *   to also specify an alternative function for destroying it
     */
    destroyMarker: function() {
        // pass
    },

    /**
     * Method: createPopup
     * HACK - we need to decide if all vector features should be able to
     *     create popups
     * 
     * Returns:
     * {<OpenLayers.Popup>} For now just returns null
     */
    createPopup: function() {
        return null;
    },

    /**
     * Method: atPoint
     * Determins whether the feature intersects with the specified location.
     * 
     * Parameters: 
     * lonlat - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
     *     object with a 'lon' and 'lat' properties.
     * toleranceLon - {float} Optional tolerance in Geometric Coords
     * toleranceLat - {float} Optional tolerance in Geographic Coords
     * 
     * Returns:
     * {Boolean} Whether or not the feature is at the specified location
     */
    atPoint: function(lonlat, toleranceLon, toleranceLat) {
        var atPoint = false;
        if(this.geometry) {
            atPoint = this.geometry.atPoint(lonlat, toleranceLon, 
                                                    toleranceLat);
        }
        return atPoint;
    },

    /**
     * Method: destroyPopup
     * HACK - we need to decide if all vector features should be able to
     * delete popups
     */
    destroyPopup: function() {
        // pass
    },

    /**
     * Method: move
     * Moves the feature and redraws it at its new location
     *
     * Parameters:
     * location - {<OpenLayers.LonLat> or <OpenLayers.Pixel>} the
     *         location to which to move the feature.
     */
    move: function(location) {

        if(!this.layer || !this.geometry.move){
            //do nothing if no layer or immoveable geometry
            return undefined;
        }

        var pixel;
        if (location.CLASS_NAME == "OpenLayers.LonLat") {
            pixel = this.layer.getViewPortPxFromLonLat(location);
        } else {
            pixel = location;
        }
        
        var lastPixel = this.layer.getViewPortPxFromLonLat(this.geometry.getBounds().getCenterLonLat());
        var res = this.layer.map.getResolution();
        this.geometry.move(res * (pixel.x - lastPixel.x),
                           res * (lastPixel.y - pixel.y));
        this.layer.drawFeature(this);
        return lastPixel;
    },
    
    /**
     * Method: toState
     * Sets the new state
     *
     * Parameters:
     * state - {String} 
     */
    toState: function(state) {
        if (state == OpenLayers.State.UPDATE) {
            switch (this.state) {
                case OpenLayers.State.UNKNOWN:
                case OpenLayers.State.DELETE:
                    this.state = state;
                    break;
                case OpenLayers.State.UPDATE:
                case OpenLayers.State.INSERT:
                    break;
            }
        } else if (state == OpenLayers.State.INSERT) {
            switch (this.state) {
                case OpenLayers.State.UNKNOWN:
                    break;
                default:
                    this.state = state;
                    break;
            }
        } else if (state == OpenLayers.State.DELETE) {
            switch (this.state) {
                case OpenLayers.State.INSERT:
                    // the feature should be destroyed
                    break;
                case OpenLayers.State.DELETE:
                    break;
                case OpenLayers.State.UNKNOWN:
                case OpenLayers.State.UPDATE:
                    this.state = state;
                    break;
            }
        } else if (state == OpenLayers.State.UNKNOWN) {
            this.state = state;
        }
    },
    
    CLASS_NAME: "OpenLayers.Feature.Vector"
});


/**
 * Constant: OpenLayers.Feature.Vector.style
 * OpenLayers features can have a number of style attributes. The 'default' 
 *     style will typically be used if no other style is specified. These
 *     styles correspond for the most part, to the styling properties defined
 *     by the SVG standard. 
 *     Information on fill properties: http://www.w3.org/TR/SVG/painting.html#FillProperties
 *     Information on stroke properties: http://www.w3.org/TR/SVG/painting.html#StrokeProperties
 *
 * Symbolizer properties:
 * fill - {Boolean} Set to false if no fill is desired.
 * fillColor - {String} Hex fill color.  Default is "#ee9900".
 * fillOpacity - {Number} Fill opacity (0-1).  Default is 0.4 
 * stroke - {Boolean} Set to false if no stroke is desired.
 * strokeColor - {String} Hex stroke color.  Default is "#ee9900".
 * strokeOpacity - {Number} Stroke opacity (0-1).  Default is 1.
 * strokeWidth - {Number} Pixel stroke width.  Default is 1.
 * strokeLinecap - {String} Stroke cap type.  Default is "round".  [butt | round | square]
 * strokeDashstyle - {String} Stroke dash style.  Default is "solid". [dot | dash | dashdot | longdash | longdashdot | solid]
 * graphic - {Boolean} Set to false if no graphic is desired.
 * pointRadius - {Number} Pixel point radius.  Default is 6.
 * pointerEvents - {String}  Default is "visiblePainted".
 * cursor - {String} Default is "".
 * externalGraphic - {String} Url to an external graphic that will be used for rendering points.
 * graphicWidth - {Number} Pixel width for sizing an external graphic.
 * graphicHeight - {Number} Pixel height for sizing an external graphic.
 * graphicOpacity - {Number} Opacity (0-1) for an external graphic.
 * graphicXOffset - {Number} Pixel offset along the positive x axis for displacing an external graphic.
 * graphicYOffset - {Number} Pixel offset along the positive y axis for displacing an external graphic.
 * rotation - {Number} For point symbolizers, this is the rotation of a graphic in the clockwise direction about its center point (or any point off center as specified by graphicXOffset and graphicYOffset).
 * graphicZIndex - {Number} The integer z-index value to use in rendering.
 * graphicName - {String} Named graphic to use when rendering points.  Supported values include "circle" (default),
 *     "square", "star", "x", "cross", "triangle".
 * graphicTitle - {String} Tooltip for an external graphic.
 * backgroundGraphic - {String} Url to a graphic to be used as the background under an externalGraphic.
 * backgroundGraphicZIndex - {Number} The integer z-index value to use in rendering the background graphic.
 * backgroundXOffset - {Number} The x offset (in pixels) for the background graphic.
 * backgroundYOffset - {Number} The y offset (in pixels) for the background graphic.
 * backgroundHeight - {Number} The height of the background graphic.  If not provided, the graphicHeight will be used.
 * backgroundWidth - {Number} The width of the background width.  If not provided, the graphicWidth will be used.
 * label - {String} The text for an optional label. For browsers that use the canvas renderer, this requires either
 *     fillText or mozDrawText to be available.
 * labelAlign - {String} Label alignment. This specifies the insertion point relative to the text. It is a string
 *     composed of two characters. The first character is for the horizontal alignment, the second for the vertical
 *     alignment. Valid values for horizontal alignment: "l"=left, "c"=center, "r"=right. Valid values for vertical
 *     alignment: "t"=top, "m"=middle, "b"=bottom. Example values: "lt", "cm", "rb". Default is "cm".
 * labelXOffset - {Number} Pixel offset along the positive x axis for displacing the label. Not supported by the canvas renderer.
 * labelYOffset - {Number} Pixel offset along the positive y axis for displacing the label. Not supported by the canvas renderer.
 * labelSelect - {Boolean} If set to true, labels will be selectable using SelectFeature or similar controls.
 *     Default is false.
 * labelOutlineColor - {String} The color of the label outline. Default is 'white'. Only supported by the canvas & SVG renderers.
 * labelOutlineWidth - {Number} The width of the label outline. Default is 3, set to 0 or null to disable. Only supported by the canvas & SVG renderers.
 * fontColor - {String} The font color for the label, to be provided like CSS.
 * fontOpacity - {Number} Opacity (0-1) for the label
 * fontFamily - {String} The font family for the label, to be provided like in CSS.
 * fontSize - {String} The font size for the label, to be provided like in CSS.
 * fontStyle - {String} The font style for the label, to be provided like in CSS.
 * fontWeight - {String} The font weight for the label, to be provided like in CSS.
 * display - {String} Symbolizers will have no effect if display is set to "none".  All other values have no effect.
 */ 
OpenLayers.Feature.Vector.style = {
    'default': {
        fillColor: "#ee9900",
        fillOpacity: 0.4, 
        hoverFillColor: "white",
        hoverFillOpacity: 0.8,
        strokeColor: "#ee9900",
        strokeOpacity: 1,
        strokeWidth: 1,
        strokeLinecap: "round",
        strokeDashstyle: "solid",
        hoverStrokeColor: "red",
        hoverStrokeOpacity: 1,
        hoverStrokeWidth: 0.2,
        pointRadius: 6,
        hoverPointRadius: 1,
        hoverPointUnit: "%",
        pointerEvents: "visiblePainted",
        cursor: "inherit",
        fontColor: "#000000",
        labelAlign: "cm",
        labelOutlineColor: "white",
        labelOutlineWidth: 3
    },
    'select': {
        fillColor: "blue",
        fillOpacity: 0.4, 
        hoverFillColor: "white",
        hoverFillOpacity: 0.8,
        strokeColor: "blue",
        strokeOpacity: 1,
        strokeWidth: 2,
        strokeLinecap: "round",
        strokeDashstyle: "solid",
        hoverStrokeColor: "red",
        hoverStrokeOpacity: 1,
        hoverStrokeWidth: 0.2,
        pointRadius: 6,
        hoverPointRadius: 1,
        hoverPointUnit: "%",
        pointerEvents: "visiblePainted",
        cursor: "pointer",
        fontColor: "#000000",
        labelAlign: "cm",
        labelOutlineColor: "white",
        labelOutlineWidth: 3

    },
    'temporary': {
        fillColor: "#66cccc",
        fillOpacity: 0.2, 
        hoverFillColor: "white",
        hoverFillOpacity: 0.8,
        strokeColor: "#66cccc",
        strokeOpacity: 1,
        strokeLinecap: "round",
        strokeWidth: 2,
        strokeDashstyle: "solid",
        hoverStrokeColor: "red",
        hoverStrokeOpacity: 1,
        hoverStrokeWidth: 0.2,
        pointRadius: 6,
        hoverPointRadius: 1,
        hoverPointUnit: "%",
        pointerEvents: "visiblePainted",
        cursor: "inherit",
        fontColor: "#000000",
        labelAlign: "cm",
        labelOutlineColor: "white",
        labelOutlineWidth: 3

    },
    'delete': {
        display: "none"
    }
};    
/* ======================================================================
    OpenLayers/Style.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 * @requires OpenLayers/Feature/Vector.js
 */

/**
 * Class: OpenLayers.Style
 * This class represents a UserStyle obtained
 *     from a SLD, containing styling rules.
 */
OpenLayers.Style = OpenLayers.Class({

    /**
     * Property: id
     * {String} A unique id for this session.
     */
    id: null,
    
    /**
     * APIProperty: name
     * {String}
     */
    name: null,
    
    /**
     * Property: title
     * {String} Title of this style (set if included in SLD)
     */
    title: null,
    
    /**
     * Property: description
     * {String} Description of this style (set if abstract is included in SLD)
     */
    description: null,

    /**
     * APIProperty: layerName
     * {<String>} name of the layer that this style belongs to, usually
     * according to the NamedLayer attribute of an SLD document.
     */
    layerName: null,
    
    /**
     * APIProperty: isDefault
     * {Boolean}
     */
    isDefault: false,
     
    /** 
     * Property: rules 
     * {Array(<OpenLayers.Rule>)}
     */
    rules: null,
    
    /**
     * Property: context
     * {Object} An optional object with properties that symbolizers' property
     * values should be evaluated against. If no context is specified,
     * feature.attributes will be used
     */
    context: null,

    /**
     * Property: defaultStyle
     * {Object} hash of style properties to use as default for merging
     * rule-based style symbolizers onto. If no rules are defined,
     * createSymbolizer will return this style. If <defaultsPerSymbolizer> is set to
     * true, the defaultStyle will only be taken into account if there are
     * rules defined.
     */
    defaultStyle: null,
    
    /**
     * Property: defaultsPerSymbolizer
     * {Boolean} If set to true, the <defaultStyle> will extend the symbolizer
     * of every rule. Properties of the <defaultStyle> will also be used to set
     * missing symbolizer properties if the symbolizer has stroke, fill or
     * graphic set to true. Default is false.
     */
    defaultsPerSymbolizer: false,
    
    /**
     * Property: propertyStyles
     * {Hash of Boolean} cache of style properties that need to be parsed for
     * propertyNames. Property names are keys, values won't be used.
     */
    propertyStyles: null,
    

    /** 
     * Constructor: OpenLayers.Style
     * Creates a UserStyle.
     *
     * Parameters:
     * style        - {Object} Optional hash of style properties that will be
     *                used as default style for this style object. This style
     *                applies if no rules are specified. Symbolizers defined in
     *                rules will extend this default style.
     * options - {Object} An optional object with properties to set on the
     *     style.
     *
     * Valid options:
     * rules - {Array(<OpenLayers.Rule>)} List of rules to be added to the
     *     style.
     * 
     * Returns:
     * {<OpenLayers.Style>}
     */
    initialize: function(style, options) {

        OpenLayers.Util.extend(this, options);
        this.rules = [];
        if(options && options.rules) {
            this.addRules(options.rules);
        }

        // use the default style from OpenLayers.Feature.Vector if no style
        // was given in the constructor
        this.setDefaultStyle(style ||
                             OpenLayers.Feature.Vector.style["default"]);

        this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
    },

    /** 
     * APIMethod: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {
        for (var i=0, len=this.rules.length; i<len; i++) {
            this.rules[i].destroy();
            this.rules[i] = null;
        }
        this.rules = null;
        this.defaultStyle = null;
    },
    
    /**
     * Method: createSymbolizer
     * creates a style by applying all feature-dependent rules to the base
     * style.
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature>} feature to evaluate rules for
     * 
     * Returns:
     * {Object} symbolizer hash
     */
    createSymbolizer: function(feature) {
        var style = this.defaultsPerSymbolizer ? {} : this.createLiterals(
            OpenLayers.Util.extend({}, this.defaultStyle), feature);
        
        var rules = this.rules;

        var rule, context;
        var elseRules = [];
        var appliedRules = false;
        for(var i=0, len=rules.length; i<len; i++) {
            rule = rules[i];
            // does the rule apply?
            var applies = rule.evaluate(feature);
            
            if(applies) {
                if(rule instanceof OpenLayers.Rule && rule.elseFilter) {
                    elseRules.push(rule);
                } else {
                    appliedRules = true;
                    this.applySymbolizer(rule, style, feature);
                }
            }
        }
        
        // if no other rules apply, apply the rules with else filters
        if(appliedRules == false && elseRules.length > 0) {
            appliedRules = true;
            for(var i=0, len=elseRules.length; i<len; i++) {
                this.applySymbolizer(elseRules[i], style, feature);
            }
        }

        // don't display if there were rules but none applied
        if(rules.length > 0 && appliedRules == false) {
            style.display = "none";
        }
        
        if (style.label != null && typeof style.label !== "string") {
            style.label = String(style.label);
        }
        
        return style;
    },
    
    /**
     * Method: applySymbolizer
     *
     * Parameters:
     * rule - {<OpenLayers.Rule>}
     * style - {Object}
     * feature - {<OpenLayer.Feature.Vector>}
     *
     * Returns:
     * {Object} A style with new symbolizer applied.
     */
    applySymbolizer: function(rule, style, feature) {
        var symbolizerPrefix = feature.geometry ?
                this.getSymbolizerPrefix(feature.geometry) :
                OpenLayers.Style.SYMBOLIZER_PREFIXES[0];

        var symbolizer = rule.symbolizer[symbolizerPrefix] || rule.symbolizer;
        
        if(this.defaultsPerSymbolizer === true) {
            var defaults = this.defaultStyle;
            OpenLayers.Util.applyDefaults(symbolizer, {
                pointRadius: defaults.pointRadius
            });
            if(symbolizer.stroke === true || symbolizer.graphic === true) {
                OpenLayers.Util.applyDefaults(symbolizer, {
                    strokeWidth: defaults.strokeWidth,
                    strokeColor: defaults.strokeColor,
                    strokeOpacity: defaults.strokeOpacity,
                    strokeDashstyle: defaults.strokeDashstyle,
                    strokeLinecap: defaults.strokeLinecap
                });
            }
            if(symbolizer.fill === true || symbolizer.graphic === true) {
                OpenLayers.Util.applyDefaults(symbolizer, {
                    fillColor: defaults.fillColor,
                    fillOpacity: defaults.fillOpacity
                });
            }
            if(symbolizer.graphic === true) {
                OpenLayers.Util.applyDefaults(symbolizer, {
                    pointRadius: this.defaultStyle.pointRadius,
                    externalGraphic: this.defaultStyle.externalGraphic,
                    graphicName: this.defaultStyle.graphicName,
                    graphicOpacity: this.defaultStyle.graphicOpacity,
                    graphicWidth: this.defaultStyle.graphicWidth,
                    graphicHeight: this.defaultStyle.graphicHeight,
                    graphicXOffset: this.defaultStyle.graphicXOffset,
                    graphicYOffset: this.defaultStyle.graphicYOffset
                });
            }
        }

        // merge the style with the current style
        return this.createLiterals(
                OpenLayers.Util.extend(style, symbolizer), feature);
    },
    
    /**
     * Method: createLiterals
     * creates literals for all style properties that have an entry in
     * <this.propertyStyles>.
     * 
     * Parameters:
     * style   - {Object} style to create literals for. Will be modified
     *           inline.
     * feature - {Object}
     * 
     * Returns:
     * {Object} the modified style
     */
    createLiterals: function(style, feature) {
        var context = OpenLayers.Util.extend({}, feature.attributes || feature.data);
        OpenLayers.Util.extend(context, this.context);
        
        for (var i in this.propertyStyles) {
            style[i] = OpenLayers.Style.createLiteral(style[i], context, feature, i);
        }
        return style;
    },
    
    /**
     * Method: findPropertyStyles
     * Looks into all rules for this style and the defaultStyle to collect
     * all the style hash property names containing ${...} strings that have
     * to be replaced using the createLiteral method before returning them.
     * 
     * Returns:
     * {Object} hash of property names that need createLiteral parsing. The
     * name of the property is the key, and the value is true;
     */
    findPropertyStyles: function() {
        var propertyStyles = {};

        // check the default style
        var style = this.defaultStyle;
        this.addPropertyStyles(propertyStyles, style);

        // walk through all rules to check for properties in their symbolizer
        var rules = this.rules;
        var symbolizer, value;
        for (var i=0, len=rules.length; i<len; i++) {
            symbolizer = rules[i].symbolizer;
            for (var key in symbolizer) {
                value = symbolizer[key];
                if (typeof value == "object") {
                    // symbolizer key is "Point", "Line" or "Polygon"
                    this.addPropertyStyles(propertyStyles, value);
                } else {
                    // symbolizer is a hash of style properties
                    this.addPropertyStyles(propertyStyles, symbolizer);
                    break;
                }
            }
        }
        return propertyStyles;
    },
    
    /**
     * Method: addPropertyStyles
     * 
     * Parameters:
     * propertyStyles - {Object} hash to add new property styles to. Will be
     *                  modified inline
     * symbolizer     - {Object} search this symbolizer for property styles
     * 
     * Returns:
     * {Object} propertyStyles hash
     */
    addPropertyStyles: function(propertyStyles, symbolizer) {
        var property;
        for (var key in symbolizer) {
            property = symbolizer[key];
            if (typeof property == "string" &&
                    property.match(/\$\{\w+\}/)) {
                propertyStyles[key] = true;
            }
        }
        return propertyStyles;
    },
    
    /**
     * APIMethod: addRules
     * Adds rules to this style.
     * 
     * Parameters:
     * rules - {Array(<OpenLayers.Rule>)}
     */
    addRules: function(rules) {
        Array.prototype.push.apply(this.rules, rules);
        this.propertyStyles = this.findPropertyStyles();
    },
    
    /**
     * APIMethod: setDefaultStyle
     * Sets the default style for this style object.
     * 
     * Parameters:
     * style - {Object} Hash of style properties
     */
    setDefaultStyle: function(style) {
        this.defaultStyle = style; 
        this.propertyStyles = this.findPropertyStyles();
    },
        
    /**
     * Method: getSymbolizerPrefix
     * Returns the correct symbolizer prefix according to the
     * geometry type of the passed geometry
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {String} key of the according symbolizer
     */
    getSymbolizerPrefix: function(geometry) {
        var prefixes = OpenLayers.Style.SYMBOLIZER_PREFIXES;
        for (var i=0, len=prefixes.length; i<len; i++) {
            if (geometry.CLASS_NAME.indexOf(prefixes[i]) != -1) {
                return prefixes[i];
            }
        }
    },
    
    /**
     * APIMethod: clone
     * Clones this style.
     * 
     * Returns:
     * {<OpenLayers.Style>} Clone of this style.
     */
    clone: function() {
        var options = OpenLayers.Util.extend({}, this);
        // clone rules
        if(this.rules) {
            options.rules = [];
            for(var i=0, len=this.rules.length; i<len; ++i) {
                options.rules.push(this.rules[i].clone());
            }
        }
        // clone context
        options.context = this.context && OpenLayers.Util.extend({}, this.context);
        //clone default style
        var defaultStyle = OpenLayers.Util.extend({}, this.defaultStyle);
        return new OpenLayers.Style(defaultStyle, options);
    },
    
    CLASS_NAME: "OpenLayers.Style"
});


/**
 * Function: createLiteral
 * converts a style value holding a combination of PropertyName and Literal
 * into a Literal, taking the property values from the passed features.
 * 
 * Parameters:
 * value - {String} value to parse. If this string contains a construct like
 *         "foo ${bar}", then "foo " will be taken as literal, and "${bar}"
 *         will be replaced by the value of the "bar" attribute of the passed
 *         feature.
 * context - {Object} context to take attribute values from
 * feature - {<OpenLayers.Feature.Vector>} optional feature to pass to
 *           <OpenLayers.String.format> for evaluating functions in the
 *           context.
 * property - {String} optional, name of the property for which the literal is
 *            being created for evaluating functions in the context.
 * 
 * Returns:
 * {String} the parsed value. In the example of the value parameter above, the
 * result would be "foo valueOfBar", assuming that the passed feature has an
 * attribute named "bar" with the value "valueOfBar".
 */
OpenLayers.Style.createLiteral = function(value, context, feature, property) {
    if (typeof value == "string" && value.indexOf("${") != -1) {
        value = OpenLayers.String.format(value, context, [feature, property]);
        value = (isNaN(value) || !value) ? value : parseFloat(value);
    }
    return value;
};
    
/**
 * Constant: OpenLayers.Style.SYMBOLIZER_PREFIXES
 * {Array} prefixes of the sld symbolizers. These are the
 * same as the main geometry types
 */
OpenLayers.Style.SYMBOLIZER_PREFIXES = ['Point', 'Line', 'Polygon', 'Text',
    'Raster'];
/* ======================================================================
    OpenLayers/Filter.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 * @requires OpenLayers/Style.js
 */

/**
 * Class: OpenLayers.Filter
 * This class represents an OGC Filter.
 */
OpenLayers.Filter = OpenLayers.Class({
    
    /** 
     * Constructor: OpenLayers.Filter
     * This class represents a generic filter.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     * 
     * Returns:
     * {<OpenLayers.Filter>}
     */
    initialize: function(options) {
        OpenLayers.Util.extend(this, options);
    },

    /** 
     * APIMethod: destroy
     * Remove reference to anything added.
     */
    destroy: function() {
    },

    /**
     * APIMethod: evaluate
     * Evaluates this filter in a specific context.  Instances or subclasses
     * are supposed to override this method.
     * 
     * Parameters:
     * context - {Object} Context to use in evaluating the filter.  If a vector
     *     feature is provided, the feature.attributes will be used as context.
     * 
     * Returns:
     * {Boolean} The filter applies.
     */
    evaluate: function(context) {
        return true;
    },
    
    /**
     * APIMethod: clone
     * Clones this filter. Should be implemented by subclasses.
     * 
     * Returns:
     * {<OpenLayers.Filter>} Clone of this filter.
     */
    clone: function() {
        return null;
    },
    
    /**
     * APIMethod: toString
     *
     * Returns:
     * {String} Include <OpenLayers.Format.CQL> in your build to get a CQL
     *     representation of the filter returned. Otherwise "[Object object]"
     *     will be returned.
     */
    toString: function() {
        var string;
        if (OpenLayers.Format && OpenLayers.Format.CQL) {
            string = OpenLayers.Format.CQL.prototype.write(this);
        } else {
            string = Object.prototype.toString.call(this);
        }
        return string;
    },
    
    CLASS_NAME: "OpenLayers.Filter"
});
/* ======================================================================
    OpenLayers/Filter/FeatureId.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Filter.js
 */

/**
 * Class: OpenLayers.Filter.FeatureId
 * This class represents a ogc:FeatureId Filter, as being used for rule-based SLD
 * styling
 * 
 * Inherits from:
 * - <OpenLayers.Filter>
 */
OpenLayers.Filter.FeatureId = OpenLayers.Class(OpenLayers.Filter, {

    /** 
     * APIProperty: fids
     * {Array(String)} Feature Ids to evaluate this rule against. 
     *     To be passed inside the params object.
     */
    fids: null,
    
    /** 
     * Property: type
     * {String} Type to identify this filter.
     */
    type: "FID",
    
    /** 
     * Constructor: OpenLayers.Filter.FeatureId
     * Creates an ogc:FeatureId rule.
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *           rule
     * 
     * Returns:
     * {<OpenLayers.Filter.FeatureId>}
     */
    initialize: function(options) {
        this.fids = [];
        OpenLayers.Filter.prototype.initialize.apply(this, [options]);
    },

    /**
     * APIMethod: evaluate
     * evaluates this rule for a specific feature
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature>} feature to apply the rule to.
     *           For vector features, the check is run against the fid,
     *           for plain features against the id.
     * 
     * Returns:
     * {Boolean} true if the rule applies, false if it does not
     */
    evaluate: function(feature) {
        for (var i=0, len=this.fids.length; i<len; i++) {
            var fid = feature.fid || feature.id;
            if (fid == this.fids[i]) {
                return true;
            }
        }
        return false;
    },
    
    /**
     * APIMethod: clone
     * Clones this filter.
     * 
     * Returns:
     * {<OpenLayers.Filter.FeatureId>} Clone of this filter.
     */
    clone: function() {
        var filter = new OpenLayers.Filter.FeatureId();
        OpenLayers.Util.extend(filter, this);
        filter.fids = this.fids.slice();
        return filter;
    },
    
    CLASS_NAME: "OpenLayers.Filter.FeatureId"
});
/* ======================================================================
    OpenLayers/Filter/Logical.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Filter.js
 */

/**
 * Class: OpenLayers.Filter.Logical
 * This class represents ogc:And, ogc:Or and ogc:Not rules.
 * 
 * Inherits from:
 * - <OpenLayers.Filter>
 */
OpenLayers.Filter.Logical = OpenLayers.Class(OpenLayers.Filter, {

    /**
     * APIProperty: filters
     * {Array(<OpenLayers.Filter>)} Child filters for this filter.
     */
    filters: null, 
     
    /**
     * APIProperty: type
     * {String} type of logical operator. Available types are:
     * - OpenLayers.Filter.Logical.AND = "&&";
     * - OpenLayers.Filter.Logical.OR  = "||";
     * - OpenLayers.Filter.Logical.NOT = "!";
     */
    type: null,

    /** 
     * Constructor: OpenLayers.Filter.Logical
     * Creates a logical filter (And, Or, Not).
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *     filter.
     * 
     * Returns:
     * {<OpenLayers.Filter.Logical>}
     */
    initialize: function(options) {
        this.filters = [];
        OpenLayers.Filter.prototype.initialize.apply(this, [options]);
    },
    
    /** 
     * APIMethod: destroy
     * Remove reference to child filters.
     */
    destroy: function() {
        this.filters = null;
        OpenLayers.Filter.prototype.destroy.apply(this);
    },

    /**
     * APIMethod: evaluate
     * Evaluates this filter in a specific context.
     * 
     * Parameters:
     * context - {Object} Context to use in evaluating the filter.  A vector
     *     feature may also be provided to evaluate feature attributes in 
     *     comparison filters or geometries in spatial filters.
     * 
     * Returns:
     * {Boolean} The filter applies.
     */
    evaluate: function(context) {
        var i, len;
        switch(this.type) {
            case OpenLayers.Filter.Logical.AND:
                for (i=0, len=this.filters.length; i<len; i++) {
                    if (this.filters[i].evaluate(context) == false) {
                        return false;
                    }
                }
                return true;
                
            case OpenLayers.Filter.Logical.OR:
                for (i=0, len=this.filters.length; i<len; i++) {
                    if (this.filters[i].evaluate(context) == true) {
                        return true;
                    }
                }
                return false;
            
            case OpenLayers.Filter.Logical.NOT:
                return (!this.filters[0].evaluate(context));
        }
        return undefined;
    },
    
    /**
     * APIMethod: clone
     * Clones this filter.
     * 
     * Returns:
     * {<OpenLayers.Filter.Logical>} Clone of this filter.
     */
    clone: function() {
        var filters = [];        
        for(var i=0, len=this.filters.length; i<len; ++i) {
            filters.push(this.filters[i].clone());
        }
        return new OpenLayers.Filter.Logical({
            type: this.type,
            filters: filters
        });
    },
    
    CLASS_NAME: "OpenLayers.Filter.Logical"
});


OpenLayers.Filter.Logical.AND = "&&";
OpenLayers.Filter.Logical.OR  = "||";
OpenLayers.Filter.Logical.NOT = "!";
/* ======================================================================
    OpenLayers/Filter/Comparison.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Filter.js
 */

/**
 * Class: OpenLayers.Filter.Comparison
 * This class represents a comparison filter.
 * 
 * Inherits from:
 * - <OpenLayers.Filter>
 */
OpenLayers.Filter.Comparison = OpenLayers.Class(OpenLayers.Filter, {

    /**
     * APIProperty: type
     * {String} type: type of the comparison. This is one of
     * - OpenLayers.Filter.Comparison.EQUAL_TO                 = "==";
     * - OpenLayers.Filter.Comparison.NOT_EQUAL_TO             = "!=";
     * - OpenLayers.Filter.Comparison.LESS_THAN                = "<";
     * - OpenLayers.Filter.Comparison.GREATER_THAN             = ">";
     * - OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO    = "<=";
     * - OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO = ">=";
     * - OpenLayers.Filter.Comparison.BETWEEN                  = "..";
     * - OpenLayers.Filter.Comparison.LIKE                     = "~"; 
     */
    type: null,
    
    /**
     * APIProperty: property
     * {String}
     * name of the context property to compare
     */
    property: null,
    
    /**
     * APIProperty: value
     * {Number} or {String}
     * comparison value for binary comparisons. In the case of a String, this
     * can be a combination of text and propertyNames in the form
     * "literal ${propertyName}"
     */
    value: null,
    
    /**
     * Property: matchCase
     * {Boolean} Force case sensitive searches for EQUAL_TO and NOT_EQUAL_TO
     *     comparisons.  The Filter Encoding 1.1 specification added a matchCase
     *     attribute to ogc:PropertyIsEqualTo and ogc:PropertyIsNotEqualTo
     *     elements.  This property will be serialized with those elements only
     *     if using the v1.1.0 filter format. However, when evaluating filters
     *     here, the matchCase property will always be respected (for EQUAL_TO
     *     and NOT_EQUAL_TO).  Default is true. 
     */
    matchCase: true,
    
    /**
     * APIProperty: lowerBoundary
     * {Number} or {String}
     * lower boundary for between comparisons. In the case of a String, this
     * can be a combination of text and propertyNames in the form
     * "literal ${propertyName}"
     */
    lowerBoundary: null,
    
    /**
     * APIProperty: upperBoundary
     * {Number} or {String}
     * upper boundary for between comparisons. In the case of a String, this
     * can be a combination of text and propertyNames in the form
     * "literal ${propertyName}"
     */
    upperBoundary: null,

    /** 
     * Constructor: OpenLayers.Filter.Comparison
     * Creates a comparison rule.
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *           rule
     * 
     * Returns:
     * {<OpenLayers.Filter.Comparison>}
     */
    initialize: function(options) {
        OpenLayers.Filter.prototype.initialize.apply(this, [options]);
        // since matchCase on PropertyIsLike is not schema compliant, we only
        // want to use this if explicitly asked for
        if (this.type === OpenLayers.Filter.Comparison.LIKE 
            && options.matchCase === undefined) {
                this.matchCase = null;
        }
    },

    /**
     * APIMethod: evaluate
     * Evaluates this filter in a specific context.
     * 
     * Parameters:
     * context - {Object} Context to use in evaluating the filter.  If a vector
     *     feature is provided, the feature.attributes will be used as context.
     * 
     * Returns:
     * {Boolean} The filter applies.
     */
    evaluate: function(context) {
        if (context instanceof OpenLayers.Feature.Vector) {
            context = context.attributes;
        }
        var result = false;
        var got = context[this.property];
        var exp;
        switch(this.type) {
            case OpenLayers.Filter.Comparison.EQUAL_TO:
                exp = this.value;
                if(!this.matchCase &&
                   typeof got == "string" && typeof exp == "string") {
                    result = (got.toUpperCase() == exp.toUpperCase());
                } else {
                    result = (got == exp);
                }
                break;
            case OpenLayers.Filter.Comparison.NOT_EQUAL_TO:
                exp = this.value;
                if(!this.matchCase &&
                   typeof got == "string" && typeof exp == "string") {
                    result = (got.toUpperCase() != exp.toUpperCase());
                } else {
                    result = (got != exp);
                }
                break;
            case OpenLayers.Filter.Comparison.LESS_THAN:
                result = got < this.value;
                break;
            case OpenLayers.Filter.Comparison.GREATER_THAN:
                result = got > this.value;
                break;
            case OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO:
                result = got <= this.value;
                break;
            case OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO:
                result = got >= this.value;
                break;
            case OpenLayers.Filter.Comparison.BETWEEN:
                result = (got >= this.lowerBoundary) &&
                    (got <= this.upperBoundary);
                break;
            case OpenLayers.Filter.Comparison.LIKE:
                var regexp = new RegExp(this.value, "gi");
                result = regexp.test(got);
                break;
        }
        return result;
    },
    
    /**
     * APIMethod: value2regex
     * Converts the value of this rule into a regular expression string,
     * according to the wildcard characters specified. This method has to
     * be called after instantiation of this class, if the value is not a
     * regular expression already.
     * 
     * Parameters:
     * wildCard   - {Char} wildcard character in the above value, default
     *              is "*"
     * singleChar - {Char} single-character wildcard in the above value
     *              default is "."
     * escapeChar - {Char} escape character in the above value, default is
     *              "!"
     * 
     * Returns:
     * {String} regular expression string
     */
    value2regex: function(wildCard, singleChar, escapeChar) {
        if (wildCard == ".") {
            throw new Error("'.' is an unsupported wildCard character for " +
                            "OpenLayers.Filter.Comparison");
        }
        

        // set UMN MapServer defaults for unspecified parameters
        wildCard = wildCard ? wildCard : "*";
        singleChar = singleChar ? singleChar : ".";
        escapeChar = escapeChar ? escapeChar : "!";
        
        this.value = this.value.replace(
                new RegExp("\\"+escapeChar+"(.|$)", "g"), "\\$1");
        this.value = this.value.replace(
                new RegExp("\\"+singleChar, "g"), ".");
        this.value = this.value.replace(
                new RegExp("\\"+wildCard, "g"), ".*");
        this.value = this.value.replace(
                new RegExp("\\\\.\\*", "g"), "\\"+wildCard);
        this.value = this.value.replace(
                new RegExp("\\\\\\.", "g"), "\\"+singleChar);
        
        return this.value;
    },
    
    /**
     * Method: regex2value
     * Convert the value of this rule from a regular expression string into an
     *     ogc literal string using a wildCard of *, a singleChar of ., and an
     *     escape of !.  Leaves the <value> property unmodified.
     * 
     * Returns:
     * {String} A string value.
     */
    regex2value: function() {
        
        var value = this.value;
        
        // replace ! with !!
        value = value.replace(/!/g, "!!");

        // replace \. with !. (watching out for \\.)
        value = value.replace(/(\\)?\\\./g, function($0, $1) {
            return $1 ? $0 : "!.";
        });
        
        // replace \* with #* (watching out for \\*)
        value = value.replace(/(\\)?\\\*/g, function($0, $1) {
            return $1 ? $0 : "!*";
        });
        
        // replace \\ with \
        value = value.replace(/\\\\/g, "\\");

        // convert .* to * (the sequence #.* is not allowed)
        value = value.replace(/\.\*/g, "*");
        
        return value;
    },
    
    /**
     * APIMethod: clone
     * Clones this filter.
     * 
     * Returns:
     * {<OpenLayers.Filter.Comparison>} Clone of this filter.
     */
    clone: function() {
        return OpenLayers.Util.extend(new OpenLayers.Filter.Comparison(), this);
    },
    
    CLASS_NAME: "OpenLayers.Filter.Comparison"
});


OpenLayers.Filter.Comparison.EQUAL_TO                 = "==";
OpenLayers.Filter.Comparison.NOT_EQUAL_TO             = "!=";
OpenLayers.Filter.Comparison.LESS_THAN                = "<";
OpenLayers.Filter.Comparison.GREATER_THAN             = ">";
OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO    = "<=";
OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO = ">=";
OpenLayers.Filter.Comparison.BETWEEN                  = "..";
OpenLayers.Filter.Comparison.LIKE                     = "~";
/* ======================================================================
    OpenLayers/Format/Filter.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 * @requires OpenLayers/Filter/FeatureId.js
 * @requires OpenLayers/Filter/Logical.js
 * @requires OpenLayers/Filter/Comparison.js
 */

/**
 * Class: OpenLayers.Format.Filter
 * Read/Wite ogc:Filter. Create a new instance with the <OpenLayers.Format.Filter>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.Filter = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.0.0".
     */
    defaultVersion: "1.0.0",
    
    /**
     * APIMethod: write
     * Write an ogc:Filter given a filter object.
     *
     * Parameters:
     * filter - {<OpenLayers.Filter>} An filter.
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {Elment} An ogc:Filter element node.
     */
    
    /**
     * APIMethod: read
     * Read and Filter doc and return an object representing the Filter.
     *
     * Parameters:
     * data - {String | DOMElement} Data to read.
     *
     * Returns:
     * {<OpenLayers.Filter>} A filter object.
     */

    CLASS_NAME: "OpenLayers.Format.Filter" 
});
/* ======================================================================
    OpenLayers/Filter/Function.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Filter.js
 */

/**
 * Class: OpenLayers.Filter.Function
 * This class represents a filter function.
 * We are using this class for creation of complex 
 * filters that can contain filter functions as values.
 * Nesting function as other functions parameter is supported.
 * 
 * Inherits from:
 * - <OpenLayers.Filter>
 */
OpenLayers.Filter.Function = OpenLayers.Class(OpenLayers.Filter, {

    /**
     * APIProperty: name
     * {String} Name of the function.
     */
    name: null,
    
    /**
     * APIProperty: params
     * {Array(<OpenLayers.Filter.Function> || String || Number)} Function parameters
     * For now support only other Functions, String or Number
     */
    params: null,  
    
    /** 
     * Constructor: OpenLayers.Filter.Function
     * Creates a filter function.
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *     function.
     * 
     * Returns:
     * {<OpenLayers.Filter.Function>}
     */

    CLASS_NAME: "OpenLayers.Filter.Function"
});

/* ======================================================================
    OpenLayers/Format/Filter/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */
/**
 * @requires OpenLayers/Format/Filter.js
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Filter/Function.js
 */

/**
 * Class: OpenLayers.Format.Filter.v1
 * Superclass for Filter version 1 parsers.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.Filter.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ogc: "http://www.opengis.net/ogc",
        gml: "http://www.opengis.net/gml",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },
    
    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "ogc",

    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocation: null,
    
    /**
     * Constructor: OpenLayers.Format.Filter.v1
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.Filter> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * Method: read
     *
     * Parameters:
     * data - {DOMElement} A Filter document element.
     *
     * Returns:
     * {<OpenLayers.Filter>} A filter object.
     */
    read: function(data) {
        var obj = {};
        this.readers.ogc["Filter"].apply(this, [data, obj]);
        return obj.filter;
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ogc": {
            "_expression": function(node) {
                // only the simplest of ogc:expression handled
                // "some text and an <PropertyName>attribute</PropertyName>"}
                var obj, value = "";
                for(var child=node.firstChild; child; child=child.nextSibling) {
                    switch(child.nodeType) {
                        case 1:
                            obj = this.readNode(child);
                            if (obj.property) {
                                value += "${" + obj.property + "}";
                            } else if (obj.value !== undefined) {
                                value += obj.value;
                            }
                            break;
                        case 3: // text node
                        case 4: // cdata section
                            value += child.nodeValue;
                    }
                }
                return value;
            },
            "Filter": function(node, parent) {
                // Filters correspond to subclasses of OpenLayers.Filter.
                // Since they contain information we don't persist, we
                // create a temporary object and then pass on the filter
                // (ogc:Filter) to the parent obj.
                var obj = {
                    fids: [],
                    filters: []
                };
                this.readChildNodes(node, obj);
                if(obj.fids.length > 0) {
                    parent.filter = new OpenLayers.Filter.FeatureId({
                        fids: obj.fids
                    });
                } else if(obj.filters.length > 0) {
                    parent.filter = obj.filters[0];
                }
            },
            "FeatureId": function(node, obj) {
                var fid = node.getAttribute("fid");
                if(fid) {
                    obj.fids.push(fid);
                }
            },
            "And": function(node, obj) {
                var filter = new OpenLayers.Filter.Logical({
                    type: OpenLayers.Filter.Logical.AND
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "Or": function(node, obj) {
                var filter = new OpenLayers.Filter.Logical({
                    type: OpenLayers.Filter.Logical.OR
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "Not": function(node, obj) {
                var filter = new OpenLayers.Filter.Logical({
                    type: OpenLayers.Filter.Logical.NOT
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsLessThan": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.LESS_THAN
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsGreaterThan": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.GREATER_THAN
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsLessThanOrEqualTo": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsGreaterThanOrEqualTo": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsBetween": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.BETWEEN
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "Literal": function(node, obj) {
                obj.value = OpenLayers.String.numericIf(
                    this.getChildValue(node));
            },
            "PropertyName": function(node, filter) {
                filter.property = this.getChildValue(node);
            },
            "LowerBoundary": function(node, filter) {
                filter.lowerBoundary = OpenLayers.String.numericIf(
                    this.readers.ogc._expression.call(this, node));
            },
            "UpperBoundary": function(node, filter) {
                filter.upperBoundary = OpenLayers.String.numericIf(
                    this.readers.ogc._expression.call(this, node));
            },
            "Intersects": function(node, obj) {
                this.readSpatial(node, obj, OpenLayers.Filter.Spatial.INTERSECTS);
            },
            "Within": function(node, obj) {
                this.readSpatial(node, obj, OpenLayers.Filter.Spatial.WITHIN);
            },
            "Contains": function(node, obj) {
                this.readSpatial(node, obj, OpenLayers.Filter.Spatial.CONTAINS);
            },
            "DWithin": function(node, obj) {
                this.readSpatial(node, obj, OpenLayers.Filter.Spatial.DWITHIN);
            },
            "Distance": function(node, obj) {
                obj.distance = parseInt(this.getChildValue(node));
                obj.distanceUnits = node.getAttribute("units");
            },
            "Function": function(node, obj) {
                //TODO write decoder for it
                return;
            }
        }
    },
    
    /**
     * Method: readSpatial
     *
     * Read a {<OpenLayers.Filter.Spatial>} filter.
     * 
     * Parameters:
     * node - {DOMElement} A DOM element that contains an ogc:expression.
     * obj - {Object} The target object.
     * type - {String} One of the OpenLayers.Filter.Spatial.* constants.
     *
     * Returns:
     * {<OpenLayers.Filter.Spatial>} The created filter.
     */
    readSpatial: function(node, obj, type) {
        var filter = new OpenLayers.Filter.Spatial({
            type: type
        });
        this.readChildNodes(node, filter);
        filter.value = filter.components[0];
        delete filter.components;
        obj.filters.push(filter);
    },

    /**
     * Method: writeOgcExpression
     * Limited support for writing OGC expressions. Currently it supports
     * (<OpenLayers.Filter.Function> || String || Number)
     *
     * Parameters:
     * value - (<OpenLayers.Filter.Function> || String || Number)
     * node - {DOMElement} A parent DOM element 
     *
     * Returns:
     * {DOMElement} Updated node element.
     */
    writeOgcExpression: function(value, node) {
        if(value instanceof OpenLayers.Filter.Function){
            var child = this.writeNode("Function", value, node);
            node.appendChild(child);
        } else {
            this.writeNode("Literal", value, node);
        }
        return node;
    },    
    
    /**
     * Method: write
     *
     * Parameters:
     * filter - {<OpenLayers.Filter>} A filter object.
     *
     * Returns:
     * {DOMElement} An ogc:Filter element.
     */
    write: function(filter) {
        return this.writers.ogc["Filter"].apply(this, [filter]);
    },
    
    /**
     * Method: writeFeatureIdNodes
     * 
     * Parameters:
     * filter - {<OpenLayers.Filter.FeatureId}
     * node - {DOMElement}
     */
    writeFeatureIdNodes: function(filter, node) {
        for (var i=0, ii=filter.fids.length; i<ii; ++i) {
            this.writeNode("FeatureId", filter.fids[i], node);
        }
    },
    
    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "ogc": {
            "Filter": function(filter) {
                var node = this.createElementNSPlus("ogc:Filter");
                if (filter.type === "FID") {
                    OpenLayers.Format.Filter.v1.prototype.writeFeatureIdNodes.call(this, filter, node);
                } else {
                    this.writeNode(this.getFilterType(filter), filter, node);
                }
                return node;
            },
            "FeatureId": function(fid) {
                return this.createElementNSPlus("ogc:FeatureId", {
                    attributes: {fid: fid}
                });
            },
            "And": function(filter) {
                var node = this.createElementNSPlus("ogc:And");
                var childFilter;
                for (var i=0, ii=filter.filters.length; i<ii; ++i) {
                    childFilter = filter.filters[i];
                    if (childFilter.type === "FID") {
                        OpenLayers.Format.Filter.v1.prototype.writeFeatureIdNodes.call(this, childFilter, node);
                    } else {
                    this.writeNode(
                        this.getFilterType(childFilter), childFilter, node
                    );
                }
                }
                return node;
            },
            "Or": function(filter) {
                var node = this.createElementNSPlus("ogc:Or");
                var childFilter;
                for (var i=0, ii=filter.filters.length; i<ii; ++i) {
                    childFilter = filter.filters[i];
                    if (childFilter.type === "FID") {
                        OpenLayers.Format.Filter.v1.prototype.writeFeatureIdNodes.call(this, childFilter, node);
                    } else {
                    this.writeNode(
                        this.getFilterType(childFilter), childFilter, node
                    );
                }
                }
                return node;
            },
            "Not": function(filter) {
                var node = this.createElementNSPlus("ogc:Not");
                var childFilter = filter.filters[0];
                if (childFilter.type === "FID") {
                    OpenLayers.Format.Filter.v1.prototype.writeFeatureIdNodes.call(this, childFilter, node);
                } else {
                this.writeNode(
                    this.getFilterType(childFilter), childFilter, node
                );
                }
                return node;
            },
            "PropertyIsLessThan": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsLessThan");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsGreaterThan": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsGreaterThan");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsLessThanOrEqualTo": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsLessThanOrEqualTo");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsGreaterThanOrEqualTo": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsGreaterThanOrEqualTo");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsBetween": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsBetween");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                this.writeNode("LowerBoundary", filter, node);
                this.writeNode("UpperBoundary", filter, node);
                return node;
            },
            "PropertyName": function(filter) {
                // no ogc:expression handling for now
                return this.createElementNSPlus("ogc:PropertyName", {
                    value: filter.property
                });
            },
            "Literal": function(value) {
                // no ogc:expression handling for now
                return this.createElementNSPlus("ogc:Literal", {
                    value: value
                });
            },
            "LowerBoundary": function(filter) {
                // handle Literals or Functions for now
                var node = this.createElementNSPlus("ogc:LowerBoundary");
                this.writeOgcExpression(filter.lowerBoundary, node);
                return node;
            },
            "UpperBoundary": function(filter) {
                // handle Literals or Functions for now
                var node = this.createElementNSPlus("ogc:UpperBoundary");
                this.writeNode("Literal", filter.upperBoundary, node);
                return node;
            },
            "INTERSECTS": function(filter) {
                return this.writeSpatial(filter, "Intersects");
            },
            "WITHIN": function(filter) {
                return this.writeSpatial(filter, "Within");
            },
            "CONTAINS": function(filter) {
                return this.writeSpatial(filter, "Contains");
            },
            "DWITHIN": function(filter) {
                var node = this.writeSpatial(filter, "DWithin");
                this.writeNode("Distance", filter, node);
                return node;
            },
            "Distance": function(filter) {
                return this.createElementNSPlus("ogc:Distance", {
                    attributes: {
                        units: filter.distanceUnits
                    },
                    value: filter.distance
                });
            },
            "Function": function(filter) {
                var node = this.createElementNSPlus("ogc:Function", {
                    attributes: {
                        name: filter.name
                    }
                });
                var params = filter.params;
                for(var i=0, len=params.length; i<len; i++){
                    this.writeOgcExpression(params[i], node);
                }
                return node;
            }
        }
    },

    /**
     * Method: getFilterType
     */
    getFilterType: function(filter) {
        var filterType = this.filterMap[filter.type];
        if(!filterType) {
            throw "Filter writing not supported for rule type: " + filter.type;
        }
        return filterType;
    },
    
    /**
     * Property: filterMap
     * {Object} Contains a member for each filter type.  Values are node names
     *     for corresponding OGC Filter child elements.
     */
    filterMap: {
        "&&": "And",
        "||": "Or",
        "!": "Not",
        "==": "PropertyIsEqualTo",
        "!=": "PropertyIsNotEqualTo",
        "<": "PropertyIsLessThan",
        ">": "PropertyIsGreaterThan",
        "<=": "PropertyIsLessThanOrEqualTo",
        ">=": "PropertyIsGreaterThanOrEqualTo",
        "..": "PropertyIsBetween",
        "~": "PropertyIsLike",
        "BBOX": "BBOX",
        "DWITHIN": "DWITHIN",
        "WITHIN": "WITHIN",
        "CONTAINS": "CONTAINS",
        "INTERSECTS": "INTERSECTS",
        "FID": "FeatureId"
    },

    CLASS_NAME: "OpenLayers.Format.Filter.v1" 

});
/* ======================================================================
    OpenLayers/Geometry.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */
 
/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Geometry
 * A Geometry is a description of a geographic object.  Create an instance of
 * this class with the <OpenLayers.Geometry> constructor.  This is a base class,
 * typical geometry types are described by subclasses of this class.
 *
 * Note that if you use the <OpenLayers.Geometry.fromWKT> method, you must
 * explicitly include the OpenLayers.Format.WKT in your build.
 */
OpenLayers.Geometry = OpenLayers.Class({

    /**
     * Property: id
     * {String} A unique identifier for this geometry.
     */
    id: null,

    /**
     * Property: parent
     * {<OpenLayers.Geometry>}This is set when a Geometry is added as component
     * of another geometry
     */
    parent: null,

    /**
     * Property: bounds 
     * {<OpenLayers.Bounds>} The bounds of this geometry
     */
    bounds: null,

    /**
     * Constructor: OpenLayers.Geometry
     * Creates a geometry object.  
     */
    initialize: function() {
        this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME+ "_");
    },
    
    /**
     * Method: destroy
     * Destroy this geometry.
     */
    destroy: function() {
        this.id = null;
        this.bounds = null;
    },
    
    /**
     * APIMethod: clone
     * Create a clone of this geometry.  Does not set any non-standard
     *     properties of the cloned geometry.
     * 
     * Returns:
     * {<OpenLayers.Geometry>} An exact clone of this geometry.
     */
    clone: function() {
        return new OpenLayers.Geometry();
    },
    
    /**
     * Method: setBounds
     * Set the bounds for this Geometry.
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     */
    setBounds: function(bounds) {
        if (bounds) {
            this.bounds = bounds.clone();
        }
    },
    
    /**
     * Method: clearBounds
     * Nullify this components bounds and that of its parent as well.
     */
    clearBounds: function() {
        this.bounds = null;
        if (this.parent) {
            this.parent.clearBounds();
        }    
    },
    
    /**
     * Method: extendBounds
     * Extend the existing bounds to include the new bounds. 
     * If geometry's bounds is not yet set, then set a new Bounds.
     * 
     * Parameters:
     * newBounds - {<OpenLayers.Bounds>} 
     */
    extendBounds: function(newBounds){
        var bounds = this.getBounds();
        if (!bounds) {
            this.setBounds(newBounds);
        } else {
            this.bounds.extend(newBounds);
        }
    },
    
    /**
     * APIMethod: getBounds
     * Get the bounds for this Geometry. If bounds is not set, it 
     * is calculated again, this makes queries faster.
     * 
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getBounds: function() {
        if (this.bounds == null) {
            this.calculateBounds();
        }
        return this.bounds;
    },
    
    /** 
     * APIMethod: calculateBounds
     * Recalculate the bounds for the geometry. 
     */
    calculateBounds: function() {
        //
        // This should be overridden by subclasses.
        //
    },
    
    /**
     * APIMethod: distanceTo
     * Calculate the closest distance between two geometries (on the x-y plane).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Optional properties for configuring the distance
     *     calculation.
     *
     * Valid options depend on the specific geometry type.
     * 
     * Returns:
     * {Number | Object} The distance between this geometry and the target.
     *     If details is true, the return will be an object with distance,
     *     x0, y0, x1, and x2 properties.  The x0 and y0 properties represent
     *     the coordinates of the closest point on this geometry. The x1 and y1
     *     properties represent the coordinates of the closest point on the
     *     target geometry.
     */
    distanceTo: function(geometry, options) {
    },
    
    /**
     * APIMethod: getVertices
     * Return a list of all points in this geometry.
     *
     * Parameters:
     * nodes - {Boolean} For lines, only return vertices that are
     *     endpoints.  If false, for lines, only vertices that are not
     *     endpoints will be returned.  If not provided, all vertices will
     *     be returned.
     *
     * Returns:
     * {Array} A list of all vertices in the geometry.
     */
    getVertices: function(nodes) {
    },

    /**
     * Method: atPoint
     * Note - This is only an approximation based on the bounds of the 
     * geometry.
     * 
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
     *     object with a 'lon' and 'lat' properties.
     * toleranceLon - {float} Optional tolerance in Geometric Coords
     * toleranceLat - {float} Optional tolerance in Geographic Coords
     * 
     * Returns:
     * {Boolean} Whether or not the geometry is at the specified location
     */
    atPoint: function(lonlat, toleranceLon, toleranceLat) {
        var atPoint = false;
        var bounds = this.getBounds();
        if ((bounds != null) && (lonlat != null)) {

            var dX = (toleranceLon != null) ? toleranceLon : 0;
            var dY = (toleranceLat != null) ? toleranceLat : 0;
    
            var toleranceBounds = 
                new OpenLayers.Bounds(this.bounds.left - dX,
                                      this.bounds.bottom - dY,
                                      this.bounds.right + dX,
                                      this.bounds.top + dY);

            atPoint = toleranceBounds.containsLonLat(lonlat);
        }
        return atPoint;
    },
    
    /**
     * Method: getLength
     * Calculate the length of this geometry. This method is defined in
     * subclasses.
     * 
     * Returns:
     * {Float} The length of the collection by summing its parts
     */
    getLength: function() {
        //to be overridden by geometries that actually have a length
        //
        return 0.0;
    },

    /**
     * Method: getArea
     * Calculate the area of this geometry. This method is defined in subclasses.
     * 
     * Returns:
     * {Float} The area of the collection by summing its parts
     */
    getArea: function() {
        //to be overridden by geometries that actually have an area
        //
        return 0.0;
    },
    
    /**
     * APIMethod: getCentroid
     * Calculate the centroid of this geometry. This method is defined in subclasses.
     *
     * Returns:
     * {<OpenLayers.Geometry.Point>} The centroid of the collection
     */
    getCentroid: function() {
        return null;
    },

    /**
     * Method: toString
     * Returns a text representation of the geometry.  If the WKT format is
     *     included in a build, this will be the Well-Known Text 
     *     representation.
     *
     * Returns:
     * {String} String representation of this geometry.
     */
    toString: function() {
        var string;
        if (OpenLayers.Format && OpenLayers.Format.WKT) {
            string = OpenLayers.Format.WKT.prototype.write(
                new OpenLayers.Feature.Vector(this)
            );
        } else {
            string = Object.prototype.toString.call(this);
        }
        return string;
    },

    CLASS_NAME: "OpenLayers.Geometry"
});

/**
 * Function: OpenLayers.Geometry.fromWKT
 * Generate a geometry given a Well-Known Text string.  For this method to
 *     work, you must include the OpenLayers.Format.WKT in your build 
 *     explicitly.
 *
 * Parameters:
 * wkt - {String} A string representing the geometry in Well-Known Text.
 *
 * Returns:
 * {<OpenLayers.Geometry>} A geometry of the appropriate class.
 */
OpenLayers.Geometry.fromWKT = function(wkt) {
    var geom;
    if (OpenLayers.Format && OpenLayers.Format.WKT) {
        var format = OpenLayers.Geometry.fromWKT.format;
        if (!format) {
            format = new OpenLayers.Format.WKT();
            OpenLayers.Geometry.fromWKT.format = format;
        }
        var result = format.read(wkt);
        if (result instanceof OpenLayers.Feature.Vector) {
            geom = result.geometry;
        } else if (OpenLayers.Util.isArray(result)) {
            var len = result.length;
            var components = new Array(len);
            for (var i=0; i<len; ++i) {
                components[i] = result[i].geometry;
            }
            geom = new OpenLayers.Geometry.Collection(components);
        }
    }
    return geom;
};
    
/**
 * Method: OpenLayers.Geometry.segmentsIntersect
 * Determine whether two line segments intersect.  Optionally calculates
 *     and returns the intersection point.  This function is optimized for
 *     cases where seg1.x2 >= seg2.x1 || seg2.x2 >= seg1.x1.  In those
 *     obvious cases where there is no intersection, the function should
 *     not be called.
 *
 * Parameters:
 * seg1 - {Object} Object representing a segment with properties x1, y1, x2,
 *     and y2.  The start point is represented by x1 and y1.  The end point
 *     is represented by x2 and y2.  Start and end are ordered so that x1 < x2.
 * seg2 - {Object} Object representing a segment with properties x1, y1, x2,
 *     and y2.  The start point is represented by x1 and y1.  The end point
 *     is represented by x2 and y2.  Start and end are ordered so that x1 < x2.
 * options - {Object} Optional properties for calculating the intersection.
 *
 * Valid options:
 * point - {Boolean} Return the intersection point.  If false, the actual
 *     intersection point will not be calculated.  If true and the segments
 *     intersect, the intersection point will be returned.  If true and
 *     the segments do not intersect, false will be returned.  If true and
 *     the segments are coincident, true will be returned.
 * tolerance - {Number} If a non-null value is provided, if the segments are
 *     within the tolerance distance, this will be considered an intersection.
 *     In addition, if the point option is true and the calculated intersection
 *     is within the tolerance distance of an end point, the endpoint will be
 *     returned instead of the calculated intersection.  Further, if the
 *     intersection is within the tolerance of endpoints on both segments, or
 *     if two segment endpoints are within the tolerance distance of eachother
 *     (but no intersection is otherwise calculated), an endpoint on the
 *     first segment provided will be returned.
 *
 * Returns:
 * {Boolean | <OpenLayers.Geometry.Point>}  The two segments intersect.
 *     If the point argument is true, the return will be the intersection
 *     point or false if none exists.  If point is true and the segments
 *     are coincident, return will be true (and the instersection is equal
 *     to the shorter segment).
 */
OpenLayers.Geometry.segmentsIntersect = function(seg1, seg2, options) {
    var point = options && options.point;
    var tolerance = options && options.tolerance;
    var intersection = false;
    var x11_21 = seg1.x1 - seg2.x1;
    var y11_21 = seg1.y1 - seg2.y1;
    var x12_11 = seg1.x2 - seg1.x1;
    var y12_11 = seg1.y2 - seg1.y1;
    var y22_21 = seg2.y2 - seg2.y1;
    var x22_21 = seg2.x2 - seg2.x1;
    var d = (y22_21 * x12_11) - (x22_21 * y12_11);
    var n1 = (x22_21 * y11_21) - (y22_21 * x11_21);
    var n2 = (x12_11 * y11_21) - (y12_11 * x11_21);
    if(d == 0) {
        // parallel
        if(n1 == 0 && n2 == 0) {
            // coincident
            intersection = true;
        }
    } else {
        var along1 = n1 / d;
        var along2 = n2 / d;
        if(along1 >= 0 && along1 <= 1 && along2 >=0 && along2 <= 1) {
            // intersect
            if(!point) {
                intersection = true;
            } else {
                // calculate the intersection point
                var x = seg1.x1 + (along1 * x12_11);
                var y = seg1.y1 + (along1 * y12_11);
                intersection = new OpenLayers.Geometry.Point(x, y);
            }
        }
    }
    if(tolerance) {
        var dist;
        if(intersection) {
            if(point) {
                var segs = [seg1, seg2];
                var seg, x, y;
                // check segment endpoints for proximity to intersection
                // set intersection to first endpoint within the tolerance
                outer: for(var i=0; i<2; ++i) {
                    seg = segs[i];
                    for(var j=1; j<3; ++j) {
                        x = seg["x" + j];
                        y = seg["y" + j];
                        dist = Math.sqrt(
                            Math.pow(x - intersection.x, 2) +
                            Math.pow(y - intersection.y, 2)
                        );
                        if(dist < tolerance) {
                            intersection.x = x;
                            intersection.y = y;
                            break outer;
                        }
                    }
                }
                
            }
        } else {
            // no calculated intersection, but segments could be within
            // the tolerance of one another
            var segs = [seg1, seg2];
            var source, target, x, y, p, result;
            // check segment endpoints for proximity to intersection
            // set intersection to first endpoint within the tolerance
            outer: for(var i=0; i<2; ++i) {
                source = segs[i];
                target = segs[(i+1)%2];
                for(var j=1; j<3; ++j) {
                    p = {x: source["x"+j], y: source["y"+j]};
                    result = OpenLayers.Geometry.distanceToSegment(p, target);
                    if(result.distance < tolerance) {
                        if(point) {
                            intersection = new OpenLayers.Geometry.Point(p.x, p.y);
                        } else {
                            intersection = true;
                        }
                        break outer;
                    }
                }
            }
        }
    }
    return intersection;
};

/**
 * Function: OpenLayers.Geometry.distanceToSegment
 *
 * Parameters:
 * point - {Object} An object with x and y properties representing the
 *     point coordinates.
 * segment - {Object} An object with x1, y1, x2, and y2 properties
 *     representing endpoint coordinates.
 *
 * Returns:
 * {Object} An object with distance, x, and y properties.  The distance
 *     will be the shortest distance between the input point and segment.
 *     The x and y properties represent the coordinates along the segment
 *     where the shortest distance meets the segment.
 */
OpenLayers.Geometry.distanceToSegment = function(point, segment) {
    var x0 = point.x;
    var y0 = point.y;
    var x1 = segment.x1;
    var y1 = segment.y1;
    var x2 = segment.x2;
    var y2 = segment.y2;
    var dx = x2 - x1;
    var dy = y2 - y1;
    var along = ((dx * (x0 - x1)) + (dy * (y0 - y1))) /
                (Math.pow(dx, 2) + Math.pow(dy, 2));
    var x, y;
    if(along <= 0.0) {
        x = x1;
        y = y1;
    } else if(along >= 1.0) {
        x = x2;
        y = y2;
    } else {
        x = x1 + along * dx;
        y = y1 + along * dy;
    }
    return {
        distance: Math.sqrt(Math.pow(x - x0, 2) + Math.pow(y - y0, 2)),
        x: x, y: y
    };
};
/* ======================================================================
    OpenLayers/Geometry/Point.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry.js
 */

/**
 * Class: OpenLayers.Geometry.Point
 * Point geometry class. 
 * 
 * Inherits from:
 *  - <OpenLayers.Geometry> 
 */
OpenLayers.Geometry.Point = OpenLayers.Class(OpenLayers.Geometry, {

    /** 
     * APIProperty: x 
     * {float} 
     */
    x: null,

    /** 
     * APIProperty: y 
     * {float} 
     */
    y: null,

    /**
     * Constructor: OpenLayers.Geometry.Point
     * Construct a point geometry.
     *
     * Parameters:
     * x - {float} 
     * y - {float}
     * 
     */
    initialize: function(x, y) {
        OpenLayers.Geometry.prototype.initialize.apply(this, arguments);
        
        this.x = parseFloat(x);
        this.y = parseFloat(y);
    },

    /**
     * APIMethod: clone
     * 
     * Returns:
     * {<OpenLayers.Geometry.Point>} An exact clone of this OpenLayers.Geometry.Point
     */
    clone: function(obj) {
        if (obj == null) {
            obj = new OpenLayers.Geometry.Point(this.x, this.y);
        }

        // catch any randomly tagged-on properties
        OpenLayers.Util.applyDefaults(obj, this);

        return obj;
    },

    /** 
     * Method: calculateBounds
     * Create a new Bounds based on the lon/lat
     */
    calculateBounds: function () {
        this.bounds = new OpenLayers.Bounds(this.x, this.y,
                                            this.x, this.y);
    },

    /**
     * APIMethod: distanceTo
     * Calculate the closest distance between two geometries (on the x-y plane).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Optional properties for configuring the distance
     *     calculation.
     *
     * Valid options:
     * details - {Boolean} Return details from the distance calculation.
     *     Default is false.
     * edge - {Boolean} Calculate the distance from this geometry to the
     *     nearest edge of the target geometry.  Default is true.  If true,
     *     calling distanceTo from a geometry that is wholly contained within
     *     the target will result in a non-zero distance.  If false, whenever
     *     geometries intersect, calling distanceTo will return 0.  If false,
     *     details cannot be returned.
     *
     * Returns:
     * {Number | Object} The distance between this geometry and the target.
     *     If details is true, the return will be an object with distance,
     *     x0, y0, x1, and x2 properties.  The x0 and y0 properties represent
     *     the coordinates of the closest point on this geometry. The x1 and y1
     *     properties represent the coordinates of the closest point on the
     *     target geometry.
     */
    distanceTo: function(geometry, options) {
        var edge = !(options && options.edge === false);
        var details = edge && options && options.details;
        var distance, x0, y0, x1, y1, result;
        if(geometry instanceof OpenLayers.Geometry.Point) {
            x0 = this.x;
            y0 = this.y;
            x1 = geometry.x;
            y1 = geometry.y;
            distance = Math.sqrt(Math.pow(x0 - x1, 2) + Math.pow(y0 - y1, 2));
            result = !details ?
                distance : {x0: x0, y0: y0, x1: x1, y1: y1, distance: distance};
        } else {
            result = geometry.distanceTo(this, options);
            if(details) {
                // switch coord order since this geom is target
                result = {
                    x0: result.x1, y0: result.y1,
                    x1: result.x0, y1: result.y0,
                    distance: result.distance
                };
            }
        }
        return result;
    },
    
    /** 
     * APIMethod: equals
     * Determine whether another geometry is equivalent to this one.  Geometries
     *     are considered equivalent if all components have the same coordinates.
     * 
     * Parameters:
     * geom - {<OpenLayers.Geometry.Point>} The geometry to test. 
     *
     * Returns:
     * {Boolean} The supplied geometry is equivalent to this geometry.
     */
    equals: function(geom) {
        var equals = false;
        if (geom != null) {
            equals = ((this.x == geom.x && this.y == geom.y) ||
                      (isNaN(this.x) && isNaN(this.y) && isNaN(geom.x) && isNaN(geom.y)));
        }
        return equals;
    },
    
    /**
     * Method: toShortString
     *
     * Returns:
     * {String} Shortened String representation of Point object. 
     *         (ex. <i>"5, 42"</i>)
     */
    toShortString: function() {
        return (this.x + ", " + this.y);
    },
    
    /**
     * APIMethod: move
     * Moves a geometry by the given displacement along positive x and y axes.
     *     This modifies the position of the geometry and clears the cached
     *     bounds.
     *
     * Parameters:
     * x - {Float} Distance to move geometry in positive x direction. 
     * y - {Float} Distance to move geometry in positive y direction.
     */
    move: function(x, y) {
        this.x = this.x + x;
        this.y = this.y + y;
        this.clearBounds();
    },

    /**
     * APIMethod: rotate
     * Rotate a point around another.
     *
     * Parameters:
     * angle - {Float} Rotation angle in degrees (measured counterclockwise
     *                 from the positive x-axis)
     * origin - {<OpenLayers.Geometry.Point>} Center point for the rotation
     */
    rotate: function(angle, origin) {
        angle *= Math.PI / 180;
        var radius = this.distanceTo(origin);
        var theta = angle + Math.atan2(this.y - origin.y, this.x - origin.x);
        this.x = origin.x + (radius * Math.cos(theta));
        this.y = origin.y + (radius * Math.sin(theta));
        this.clearBounds();
    },
    
    /**
     * APIMethod: getCentroid
     *
     * Returns:
     * {<OpenLayers.Geometry.Point>} The centroid of the collection
     */
    getCentroid: function() {
        return new OpenLayers.Geometry.Point(this.x, this.y);
    },

    /**
     * APIMethod: resize
     * Resize a point relative to some origin.  For points, this has the effect
     *     of scaling a vector (from the origin to the point).  This method is
     *     more useful on geometry collection subclasses.
     *
     * Parameters:
     * scale - {Float} Ratio of the new distance from the origin to the old
     *                 distance from the origin.  A scale of 2 doubles the
     *                 distance between the point and origin.
     * origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing
     * ratio - {Float} Optional x:y ratio for resizing.  Default ratio is 1.
     * 
     * Returns:
     * {<OpenLayers.Geometry>} - The current geometry. 
     */
    resize: function(scale, origin, ratio) {
        ratio = (ratio == undefined) ? 1 : ratio;
        this.x = origin.x + (scale * ratio * (this.x - origin.x));
        this.y = origin.y + (scale * (this.y - origin.y));
        this.clearBounds();
        return this;
    },
    
    /**
     * APIMethod: intersects
     * Determine if the input geometry intersects this one.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} Any type of geometry.
     *
     * Returns:
     * {Boolean} The input geometry intersects this one.
     */
    intersects: function(geometry) {
        var intersect = false;
        if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
            intersect = this.equals(geometry);
        } else {
            intersect = geometry.intersects(this);
        }
        return intersect;
    },
    
    /**
     * APIMethod: transform
     * Translate the x,y properties of the point from source to dest.
     * 
     * Parameters:
     * source - {<OpenLayers.Projection>} 
     * dest - {<OpenLayers.Projection>}
     * 
     * Returns:
     * {<OpenLayers.Geometry>} 
     */
    transform: function(source, dest) {
        if ((source && dest)) {
            OpenLayers.Projection.transform(
                this, source, dest); 
            this.bounds = null;
        }       
        return this;
    },

    /**
     * APIMethod: getVertices
     * Return a list of all points in this geometry.
     *
     * Parameters:
     * nodes - {Boolean} For lines, only return vertices that are
     *     endpoints.  If false, for lines, only vertices that are not
     *     endpoints will be returned.  If not provided, all vertices will
     *     be returned.
     *
     * Returns:
     * {Array} A list of all vertices in the geometry.
     */
    getVertices: function(nodes) {
        return [this];
    },

    CLASS_NAME: "OpenLayers.Geometry.Point"
});
/* ======================================================================
    OpenLayers/Geometry/Collection.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry.js
 */

/**
 * Class: OpenLayers.Geometry.Collection
 * A Collection is exactly what it sounds like: A collection of different 
 * Geometries. These are stored in the local parameter <components> (which
 * can be passed as a parameter to the constructor). 
 * 
 * As new geometries are added to the collection, they are NOT cloned. 
 * When removing geometries, they need to be specified by reference (ie you 
 * have to pass in the *exact* geometry to be removed).
 * 
 * The <getArea> and <getLength> functions here merely iterate through
 * the components, summing their respective areas and lengths.
 *
 * Create a new instance with the <OpenLayers.Geometry.Collection> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Geometry> 
 */
OpenLayers.Geometry.Collection = OpenLayers.Class(OpenLayers.Geometry, {

    /**
     * APIProperty: components
     * {Array(<OpenLayers.Geometry>)} The component parts of this geometry
     */
    components: null,
    
    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of
     * components that the collection can include.  A null value means the
     * component types are not restricted.
     */
    componentTypes: null,

    /**
     * Constructor: OpenLayers.Geometry.Collection
     * Creates a Geometry Collection -- a list of geoms.
     *
     * Parameters: 
     * components - {Array(<OpenLayers.Geometry>)} Optional array of geometries
     *
     */
    initialize: function (components) {
        OpenLayers.Geometry.prototype.initialize.apply(this, arguments);
        this.components = [];
        if (components != null) {
            this.addComponents(components);
        }
    },

    /**
     * APIMethod: destroy
     * Destroy this geometry.
     */
    destroy: function () {
        this.components.length = 0;
        this.components = null;
        OpenLayers.Geometry.prototype.destroy.apply(this, arguments);
    },

    /**
     * APIMethod: clone
     * Clone this geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.Collection>} An exact clone of this collection
     */
    clone: function() {
        var geometry = eval("new " + this.CLASS_NAME + "()");
        for(var i=0, len=this.components.length; i<len; i++) {
            geometry.addComponent(this.components[i].clone());
        }
        
        // catch any randomly tagged-on properties
        OpenLayers.Util.applyDefaults(geometry, this);
        
        return geometry;
    },

    /**
     * Method: getComponentsString
     * Get a string representing the components for this collection
     * 
     * Returns:
     * {String} A string representation of the components of this geometry
     */
    getComponentsString: function(){
        var strings = [];
        for(var i=0, len=this.components.length; i<len; i++) {
            strings.push(this.components[i].toShortString()); 
        }
        return strings.join(",");
    },

    /**
     * APIMethod: calculateBounds
     * Recalculate the bounds by iterating through the components and 
     * calling calling extendBounds() on each item.
     */
    calculateBounds: function() {
        this.bounds = null;
        var bounds = new OpenLayers.Bounds();
        var components = this.components;
        if (components) {
            for (var i=0, len=components.length; i<len; i++) {
                bounds.extend(components[i].getBounds());
            }
        }
        // to preserve old behavior, we only set bounds if non-null
        // in the future, we could add bounds.isEmpty()
        if (bounds.left != null && bounds.bottom != null && 
            bounds.right != null && bounds.top != null) {
            this.setBounds(bounds);
        }
    },

    /**
     * APIMethod: addComponents
     * Add components to this geometry.
     *
     * Parameters:
     * components - {Array(<OpenLayers.Geometry>)} An array of geometries to add
     */
    addComponents: function(components){
        if(!(OpenLayers.Util.isArray(components))) {
            components = [components];
        }
        for(var i=0, len=components.length; i<len; i++) {
            this.addComponent(components[i]);
        }
    },

    /**
     * Method: addComponent
     * Add a new component (geometry) to the collection.  If this.componentTypes
     * is set, then the component class name must be in the componentTypes array.
     *
     * The bounds cache is reset.
     * 
     * Parameters:
     * component - {<OpenLayers.Geometry>} A geometry to add
     * index - {int} Optional index into the array to insert the component
     *
     * Returns:
     * {Boolean} The component geometry was successfully added
     */    
    addComponent: function(component, index) {
        var added = false;
        if(component) {
            if(this.componentTypes == null ||
               (OpenLayers.Util.indexOf(this.componentTypes,
                                        component.CLASS_NAME) > -1)) {

                if(index != null && (index < this.components.length)) {
                    var components1 = this.components.slice(0, index);
                    var components2 = this.components.slice(index, 
                                                           this.components.length);
                    components1.push(component);
                    this.components = components1.concat(components2);
                } else {
                    this.components.push(component);
                }
                component.parent = this;
                this.clearBounds();
                added = true;
            }
        }
        return added;
    },
    
    /**
     * APIMethod: removeComponents
     * Remove components from this geometry.
     *
     * Parameters:
     * components - {Array(<OpenLayers.Geometry>)} The components to be removed
     *
     * Returns: 
     * {Boolean} A component was removed.
     */
    removeComponents: function(components) {
        var removed = false;

        if(!(OpenLayers.Util.isArray(components))) {
            components = [components];
        }
        for(var i=components.length-1; i>=0; --i) {
            removed = this.removeComponent(components[i]) || removed;
        }
        return removed;
    },
    
    /**
     * Method: removeComponent
     * Remove a component from this geometry.
     *
     * Parameters:
     * component - {<OpenLayers.Geometry>} 
     *
     * Returns: 
     * {Boolean} The component was removed.
     */
    removeComponent: function(component) {
        
        OpenLayers.Util.removeItem(this.components, component);
        
        // clearBounds() so that it gets recalculated on the next call
        // to this.getBounds();
        this.clearBounds();
        return true;
    },

    /**
     * APIMethod: getLength
     * Calculate the length of this geometry
     *
     * Returns:
     * {Float} The length of the geometry
     */
    getLength: function() {
        var length = 0.0;
        for (var i=0, len=this.components.length; i<len; i++) {
            length += this.components[i].getLength();
        }
        return length;
    },
    
    /**
     * APIMethod: getArea
     * Calculate the area of this geometry. Note how this function is overridden
     * in <OpenLayers.Geometry.Polygon>.
     *
     * Returns:
     * {Float} The area of the collection by summing its parts
     */
    getArea: function() {
        var area = 0.0;
        for (var i=0, len=this.components.length; i<len; i++) {
            area += this.components[i].getArea();
        }
        return area;
    },

    /** 
     * APIMethod: getGeodesicArea
     * Calculate the approximate area of the polygon were it projected onto
     *     the earth.
     *
     * Parameters:
     * projection - {<OpenLayers.Projection>} The spatial reference system
     *     for the geometry coordinates.  If not provided, Geographic/WGS84 is
     *     assumed.
     * 
     * Reference:
     * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
     *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
     *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
     *
     * Returns:
     * {float} The approximate geodesic area of the geometry in square meters.
     */
    getGeodesicArea: function(projection) {
        var area = 0.0;
        for(var i=0, len=this.components.length; i<len; i++) {
            area += this.components[i].getGeodesicArea(projection);
        }
        return area;
    },
    
    /**
     * APIMethod: getCentroid
     *
     * Compute the centroid for this geometry collection.
     *
     * Parameters:
     * weighted - {Boolean} Perform the getCentroid computation recursively,
     * returning an area weighted average of all geometries in this collection.
     *
     * Returns:
     * {<OpenLayers.Geometry.Point>} The centroid of the collection
     */
    getCentroid: function(weighted) {
        if (!weighted) {
            return this.components.length && this.components[0].getCentroid();
        }
        var len = this.components.length;
        if (!len) {
            return false;
        }
        
        var areas = [];
        var centroids = [];
        var areaSum = 0;
        var minArea = Number.MAX_VALUE;
        var component;
        for (var i=0; i<len; ++i) {
            component = this.components[i];
            var area = component.getArea();
            var centroid = component.getCentroid(true);
            if (isNaN(area) || isNaN(centroid.x) || isNaN(centroid.y)) {
                continue;
            }
            areas.push(area);
            areaSum += area;
            minArea = (area < minArea && area > 0) ? area : minArea;
            centroids.push(centroid);
        }
        len = areas.length;
        if (areaSum === 0) {
            // all the components in this collection have 0 area
            // probably a collection of points -- weight all the points the same
            for (var i=0; i<len; ++i) {
                areas[i] = 1;
            }
            areaSum = areas.length;
        } else {
            // normalize all the areas where the smallest area will get
            // a value of 1
            for (var i=0; i<len; ++i) {
                areas[i] /= minArea;
            }
            areaSum /= minArea;
        }
        
        var xSum = 0, ySum = 0, centroid, area;
        for (var i=0; i<len; ++i) {
            centroid = centroids[i];
            area = areas[i];
            xSum += centroid.x * area;
            ySum += centroid.y * area;
        }
        
        return new OpenLayers.Geometry.Point(xSum/areaSum, ySum/areaSum);
    },

    /**
     * APIMethod: getGeodesicLength
     * Calculate the approximate length of the geometry were it projected onto
     *     the earth.
     *
     * projection - {<OpenLayers.Projection>} The spatial reference system
     *     for the geometry coordinates.  If not provided, Geographic/WGS84 is
     *     assumed.
     * 
     * Returns:
     * {Float} The appoximate geodesic length of the geometry in meters.
     */
    getGeodesicLength: function(projection) {
        var length = 0.0;
        for(var i=0, len=this.components.length; i<len; i++) {
            length += this.components[i].getGeodesicLength(projection);
        }
        return length;
    },

    /**
     * APIMethod: move
     * Moves a geometry by the given displacement along positive x and y axes.
     *     This modifies the position of the geometry and clears the cached
     *     bounds.
     *
     * Parameters:
     * x - {Float} Distance to move geometry in positive x direction. 
     * y - {Float} Distance to move geometry in positive y direction.
     */
    move: function(x, y) {
        for(var i=0, len=this.components.length; i<len; i++) {
            this.components[i].move(x, y);
        }
    },

    /**
     * APIMethod: rotate
     * Rotate a geometry around some origin
     *
     * Parameters:
     * angle - {Float} Rotation angle in degrees (measured counterclockwise
     *                 from the positive x-axis)
     * origin - {<OpenLayers.Geometry.Point>} Center point for the rotation
     */
    rotate: function(angle, origin) {
        for(var i=0, len=this.components.length; i<len; ++i) {
            this.components[i].rotate(angle, origin);
        }
    },

    /**
     * APIMethod: resize
     * Resize a geometry relative to some origin.  Use this method to apply
     *     a uniform scaling to a geometry.
     *
     * Parameters:
     * scale - {Float} Factor by which to scale the geometry.  A scale of 2
     *                 doubles the size of the geometry in each dimension
     *                 (lines, for example, will be twice as long, and polygons
     *                 will have four times the area).
     * origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing
     * ratio - {Float} Optional x:y ratio for resizing.  Default ratio is 1.
     * 
     * Returns:
     * {<OpenLayers.Geometry>} - The current geometry. 
     */
    resize: function(scale, origin, ratio) {
        for(var i=0; i<this.components.length; ++i) {
            this.components[i].resize(scale, origin, ratio);
        }
        return this;
    },

    /**
     * APIMethod: distanceTo
     * Calculate the closest distance between two geometries (on the x-y plane).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Optional properties for configuring the distance
     *     calculation.
     *
     * Valid options:
     * details - {Boolean} Return details from the distance calculation.
     *     Default is false.
     * edge - {Boolean} Calculate the distance from this geometry to the
     *     nearest edge of the target geometry.  Default is true.  If true,
     *     calling distanceTo from a geometry that is wholly contained within
     *     the target will result in a non-zero distance.  If false, whenever
     *     geometries intersect, calling distanceTo will return 0.  If false,
     *     details cannot be returned.
     *
     * Returns:
     * {Number | Object} The distance between this geometry and the target.
     *     If details is true, the return will be an object with distance,
     *     x0, y0, x1, and y1 properties.  The x0 and y0 properties represent
     *     the coordinates of the closest point on this geometry. The x1 and y1
     *     properties represent the coordinates of the closest point on the
     *     target geometry.
     */
    distanceTo: function(geometry, options) {
        var edge = !(options && options.edge === false);
        var details = edge && options && options.details;
        var result, best, distance;
        var min = Number.POSITIVE_INFINITY;
        for(var i=0, len=this.components.length; i<len; ++i) {
            result = this.components[i].distanceTo(geometry, options);
            distance = details ? result.distance : result;
            if(distance < min) {
                min = distance;
                best = result;
                if(min == 0) {
                    break;
                }
            }
        }
        return best;
    },

    /** 
     * APIMethod: equals
     * Determine whether another geometry is equivalent to this one.  Geometries
     *     are considered equivalent if all components have the same coordinates.
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The geometry to test. 
     *
     * Returns:
     * {Boolean} The supplied geometry is equivalent to this geometry.
     */
    equals: function(geometry) {
        var equivalent = true;
        if(!geometry || !geometry.CLASS_NAME ||
           (this.CLASS_NAME != geometry.CLASS_NAME)) {
            equivalent = false;
        } else if(!(OpenLayers.Util.isArray(geometry.components)) ||
                  (geometry.components.length != this.components.length)) {
            equivalent = false;
        } else {
            for(var i=0, len=this.components.length; i<len; ++i) {
                if(!this.components[i].equals(geometry.components[i])) {
                    equivalent = false;
                    break;
                }
            }
        }
        return equivalent;
    },

    /**
     * APIMethod: transform
     * Reproject the components geometry from source to dest.
     * 
     * Parameters:
     * source - {<OpenLayers.Projection>} 
     * dest - {<OpenLayers.Projection>}
     * 
     * Returns:
     * {<OpenLayers.Geometry>} 
     */
    transform: function(source, dest) {
        if (source && dest) {
            for (var i=0, len=this.components.length; i<len; i++) {  
                var component = this.components[i];
                component.transform(source, dest);
            }
            this.bounds = null;
        }
        return this;
    },

    /**
     * APIMethod: intersects
     * Determine if the input geometry intersects this one.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} Any type of geometry.
     *
     * Returns:
     * {Boolean} The input geometry intersects this one.
     */
    intersects: function(geometry) {
        var intersect = false;
        for(var i=0, len=this.components.length; i<len; ++ i) {
            intersect = geometry.intersects(this.components[i]);
            if(intersect) {
                break;
            }
        }
        return intersect;
    },

    /**
     * APIMethod: getVertices
     * Return a list of all points in this geometry.
     *
     * Parameters:
     * nodes - {Boolean} For lines, only return vertices that are
     *     endpoints.  If false, for lines, only vertices that are not
     *     endpoints will be returned.  If not provided, all vertices will
     *     be returned.
     *
     * Returns:
     * {Array} A list of all vertices in the geometry.
     */
    getVertices: function(nodes) {
        var vertices = [];
        for(var i=0, len=this.components.length; i<len; ++i) {
            Array.prototype.push.apply(
                vertices, this.components[i].getVertices(nodes)
            );
        }
        return vertices;
    },


    CLASS_NAME: "OpenLayers.Geometry.Collection"
});
/* ======================================================================
    OpenLayers/Geometry/MultiPoint.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/Collection.js
 * @requires OpenLayers/Geometry/Point.js
 */

/**
 * Class: OpenLayers.Geometry.MultiPoint
 * MultiPoint is a collection of Points.  Create a new instance with the
 * <OpenLayers.Geometry.MultiPoint> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Geometry.Collection>
 *  - <OpenLayers.Geometry>
 */
OpenLayers.Geometry.MultiPoint = OpenLayers.Class(
  OpenLayers.Geometry.Collection, {

    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of
     * components that the collection can include.  A null value means the
     * component types are not restricted.
     */
    componentTypes: ["OpenLayers.Geometry.Point"],

    /**
     * Constructor: OpenLayers.Geometry.MultiPoint
     * Create a new MultiPoint Geometry
     *
     * Parameters:
     * components - {Array(<OpenLayers.Geometry.Point>)} 
     *
     * Returns:
     * {<OpenLayers.Geometry.MultiPoint>}
     */

    /**
     * APIMethod: addPoint
     * Wrapper for <OpenLayers.Geometry.Collection.addComponent>
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>} Point to be added
     * index - {Integer} Optional index
     */
    addPoint: function(point, index) {
        this.addComponent(point, index);
    },
    
    /**
     * APIMethod: removePoint
     * Wrapper for <OpenLayers.Geometry.Collection.removeComponent>
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>} Point to be removed
     */
    removePoint: function(point){
        this.removeComponent(point);
    },

    CLASS_NAME: "OpenLayers.Geometry.MultiPoint"
});
/* ======================================================================
    OpenLayers/Geometry/Curve.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/MultiPoint.js
 */

/**
 * Class: OpenLayers.Geometry.Curve
 * A Curve is a MultiPoint, whose points are assumed to be connected. To 
 * this end, we provide a "getLength()" function, which iterates through 
 * the points, summing the distances between them. 
 * 
 * Inherits: 
 *  - <OpenLayers.Geometry.MultiPoint>
 */
OpenLayers.Geometry.Curve = OpenLayers.Class(OpenLayers.Geometry.MultiPoint, {

    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of 
     *                 components that the collection can include.  A null 
     *                 value means the component types are not restricted.
     */
    componentTypes: ["OpenLayers.Geometry.Point"],

    /**
     * Constructor: OpenLayers.Geometry.Curve
     * 
     * Parameters:
     * point - {Array(<OpenLayers.Geometry.Point>)}
     */
    
    /**
     * APIMethod: getLength
     * 
     * Returns:
     * {Float} The length of the curve
     */
    getLength: function() {
        var length = 0.0;
        if ( this.components && (this.components.length > 1)) {
            for(var i=1, len=this.components.length; i<len; i++) {
                length += this.components[i-1].distanceTo(this.components[i]);
            }
        }
        return length;
    },

    /**
     * APIMethod: getGeodesicLength
     * Calculate the approximate length of the geometry were it projected onto
     *     the earth.
     *
     * projection - {<OpenLayers.Projection>} The spatial reference system
     *     for the geometry coordinates.  If not provided, Geographic/WGS84 is
     *     assumed.
     * 
     * Returns:
     * {Float} The appoximate geodesic length of the geometry in meters.
     */
    getGeodesicLength: function(projection) {
        var geom = this;  // so we can work with a clone if needed
        if(projection) {
            var gg = new OpenLayers.Projection("EPSG:4326");
            if(!gg.equals(projection)) {
                geom = this.clone().transform(projection, gg);
            }
        }
        var length = 0.0;
        if(geom.components && (geom.components.length > 1)) {
            var p1, p2;
            for(var i=1, len=geom.components.length; i<len; i++) {
                p1 = geom.components[i-1];
                p2 = geom.components[i];
                // this returns km and requires lon/lat properties
                length += OpenLayers.Util.distVincenty(
                    {lon: p1.x, lat: p1.y}, {lon: p2.x, lat: p2.y}
                );
            }
        }
        // convert to m
        return length * 1000;
    },

    CLASS_NAME: "OpenLayers.Geometry.Curve"
});
/* ======================================================================
    OpenLayers/Geometry/LineString.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/Curve.js
 */

/**
 * Class: OpenLayers.Geometry.LineString
 * A LineString is a Curve which, once two points have been added to it, can 
 * never be less than two points long.
 * 
 * Inherits from:
 *  - <OpenLayers.Geometry.Curve>
 */
OpenLayers.Geometry.LineString = OpenLayers.Class(OpenLayers.Geometry.Curve, {

    /**
     * Constructor: OpenLayers.Geometry.LineString
     * Create a new LineString geometry
     *
     * Parameters:
     * points - {Array(<OpenLayers.Geometry.Point>)} An array of points used to
     *          generate the linestring
     *
     */

    /**
     * APIMethod: removeComponent
     * Only allows removal of a point if there are three or more points in 
     * the linestring. (otherwise the result would be just a single point)
     *
     * Parameters: 
     * point - {<OpenLayers.Geometry.Point>} The point to be removed
     *
     * Returns: 
     * {Boolean} The component was removed.
     */
    removeComponent: function(point) {
        var removed = this.components && (this.components.length > 2);
        if (removed) {
            OpenLayers.Geometry.Collection.prototype.removeComponent.apply(this, 
                                                                  arguments);
        }
        return removed;
    },
    
    /**
     * APIMethod: intersects
     * Test for instersection between two geometries.  This is a cheapo
     *     implementation of the Bently-Ottmann algorigithm.  It doesn't
     *     really keep track of a sweep line data structure.  It is closer
     *     to the brute force method, except that segments are sorted and
     *     potential intersections are only calculated when bounding boxes
     *     intersect.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     *
     * Returns:
     * {Boolean} The input geometry intersects this geometry.
     */
    intersects: function(geometry) {
        var intersect = false;
        var type = geometry.CLASS_NAME;
        if(type == "OpenLayers.Geometry.LineString" ||
           type == "OpenLayers.Geometry.LinearRing" ||
           type == "OpenLayers.Geometry.Point") {
            var segs1 = this.getSortedSegments();
            var segs2;
            if(type == "OpenLayers.Geometry.Point") {
                segs2 = [{
                    x1: geometry.x, y1: geometry.y,
                    x2: geometry.x, y2: geometry.y
                }];
            } else {
                segs2 = geometry.getSortedSegments();
            }
            var seg1, seg1x1, seg1x2, seg1y1, seg1y2,
                seg2, seg2y1, seg2y2;
            // sweep right
            outer: for(var i=0, len=segs1.length; i<len; ++i) {
                seg1 = segs1[i];
                seg1x1 = seg1.x1;
                seg1x2 = seg1.x2;
                seg1y1 = seg1.y1;
                seg1y2 = seg1.y2;
                inner: for(var j=0, jlen=segs2.length; j<jlen; ++j) {
                    seg2 = segs2[j];
                    if(seg2.x1 > seg1x2) {
                        // seg1 still left of seg2
                        break;
                    }
                    if(seg2.x2 < seg1x1) {
                        // seg2 still left of seg1
                        continue;
                    }
                    seg2y1 = seg2.y1;
                    seg2y2 = seg2.y2;
                    if(Math.min(seg2y1, seg2y2) > Math.max(seg1y1, seg1y2)) {
                        // seg2 above seg1
                        continue;
                    }
                    if(Math.max(seg2y1, seg2y2) < Math.min(seg1y1, seg1y2)) {
                        // seg2 below seg1
                        continue;
                    }
                    if(OpenLayers.Geometry.segmentsIntersect(seg1, seg2)) {
                        intersect = true;
                        break outer;
                    }
                }
            }
        } else {
            intersect = geometry.intersects(this);
        }
        return intersect;
    },
    
    /**
     * Method: getSortedSegments
     *
     * Returns:
     * {Array} An array of segment objects.  Segment objects have properties
     *     x1, y1, x2, and y2.  The start point is represented by x1 and y1.
     *     The end point is represented by x2 and y2.  Start and end are
     *     ordered so that x1 < x2.
     */
    getSortedSegments: function() {
        var numSeg = this.components.length - 1;
        var segments = new Array(numSeg), point1, point2;
        for(var i=0; i<numSeg; ++i) {
            point1 = this.components[i];
            point2 = this.components[i + 1];
            if(point1.x < point2.x) {
                segments[i] = {
                    x1: point1.x,
                    y1: point1.y,
                    x2: point2.x,
                    y2: point2.y
                };
            } else {
                segments[i] = {
                    x1: point2.x,
                    y1: point2.y,
                    x2: point1.x,
                    y2: point1.y
                };
            }
        }
        // more efficient to define this somewhere static
        function byX1(seg1, seg2) {
            return seg1.x1 - seg2.x1;
        }
        return segments.sort(byX1);
    },
    
    /**
     * Method: splitWithSegment
     * Split this geometry with the given segment.
     *
     * Parameters:
     * seg - {Object} An object with x1, y1, x2, and y2 properties referencing
     *     segment endpoint coordinates.
     * options - {Object} Properties of this object will be used to determine
     *     how the split is conducted.
     *
     * Valid options:
     * edge - {Boolean} Allow splitting when only edges intersect.  Default is
     *     true.  If false, a vertex on the source segment must be within the
     *     tolerance distance of the intersection to be considered a split.
     * tolerance - {Number} If a non-null value is provided, intersections
     *     within the tolerance distance of one of the source segment's
     *     endpoints will be assumed to occur at the endpoint.
     *
     * Returns:
     * {Object} An object with *lines* and *points* properties.  If the given
     *     segment intersects this linestring, the lines array will reference
     *     geometries that result from the split.  The points array will contain
     *     all intersection points.  Intersection points are sorted along the
     *     segment (in order from x1,y1 to x2,y2).
     */
    splitWithSegment: function(seg, options) {
        var edge = !(options && options.edge === false);
        var tolerance = options && options.tolerance;
        var lines = [];
        var verts = this.getVertices();
        var points = [];
        var intersections = [];
        var split = false;
        var vert1, vert2, point;
        var node, vertex, target;
        var interOptions = {point: true, tolerance: tolerance};
        var result = null;
        for(var i=0, stop=verts.length-2; i<=stop; ++i) {
            vert1 = verts[i];
            points.push(vert1.clone());
            vert2 = verts[i+1];
            target = {x1: vert1.x, y1: vert1.y, x2: vert2.x, y2: vert2.y};
            point = OpenLayers.Geometry.segmentsIntersect(
                seg, target, interOptions
            );
            if(point instanceof OpenLayers.Geometry.Point) {
                if((point.x === seg.x1 && point.y === seg.y1) ||
                   (point.x === seg.x2 && point.y === seg.y2) ||
                   point.equals(vert1) || point.equals(vert2)) {
                    vertex = true;
                } else {
                    vertex = false;
                }
                if(vertex || edge) {
                    // push intersections different than the previous
                    if(!point.equals(intersections[intersections.length-1])) {
                        intersections.push(point.clone());
                    }
                    if(i === 0) {
                        if(point.equals(vert1)) {
                            continue;
                        }
                    }
                    if(point.equals(vert2)) {
                        continue;
                    }
                    split = true;
                    if(!point.equals(vert1)) {
                        points.push(point);
                    }
                    lines.push(new OpenLayers.Geometry.LineString(points));
                    points = [point.clone()];
                }
            }
        }
        if(split) {
            points.push(vert2.clone());
            lines.push(new OpenLayers.Geometry.LineString(points));
        }
        if(intersections.length > 0) {
            // sort intersections along segment
            var xDir = seg.x1 < seg.x2 ? 1 : -1;
            var yDir = seg.y1 < seg.y2 ? 1 : -1;
            result = {
                lines: lines,
                points: intersections.sort(function(p1, p2) {
                    return (xDir * p1.x - xDir * p2.x) || (yDir * p1.y - yDir * p2.y);
                })
            };
        }
        return result;
    },

    /**
     * Method: split
     * Use this geometry (the source) to attempt to split a target geometry.
     * 
     * Parameters:
     * target - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Properties of this object will be used to determine
     *     how the split is conducted.
     *
     * Valid options:
     * mutual - {Boolean} Split the source geometry in addition to the target
     *     geometry.  Default is false.
     * edge - {Boolean} Allow splitting when only edges intersect.  Default is
     *     true.  If false, a vertex on the source must be within the tolerance
     *     distance of the intersection to be considered a split.
     * tolerance - {Number} If a non-null value is provided, intersections
     *     within the tolerance distance of an existing vertex on the source
     *     will be assumed to occur at the vertex.
     * 
     * Returns:
     * {Array} A list of geometries (of this same type as the target) that
     *     result from splitting the target with the source geometry.  The
     *     source and target geometry will remain unmodified.  If no split
     *     results, null will be returned.  If mutual is true and a split
     *     results, return will be an array of two arrays - the first will be
     *     all geometries that result from splitting the source geometry and
     *     the second will be all geometries that result from splitting the
     *     target geometry.
     */
    split: function(target, options) {
        var results = null;
        var mutual = options && options.mutual;
        var sourceSplit, targetSplit, sourceParts, targetParts;
        if(target instanceof OpenLayers.Geometry.LineString) {
            var verts = this.getVertices();
            var vert1, vert2, seg, splits, lines, point;
            var points = [];
            sourceParts = [];
            for(var i=0, stop=verts.length-2; i<=stop; ++i) {
                vert1 = verts[i];
                vert2 = verts[i+1];
                seg = {
                    x1: vert1.x, y1: vert1.y,
                    x2: vert2.x, y2: vert2.y
                };
                targetParts = targetParts || [target];
                if(mutual) {
                    points.push(vert1.clone());
                }
                for(var j=0; j<targetParts.length; ++j) {
                    splits = targetParts[j].splitWithSegment(seg, options);
                    if(splits) {
                        // splice in new features
                        lines = splits.lines;
                        if(lines.length > 0) {
                            lines.unshift(j, 1);
                            Array.prototype.splice.apply(targetParts, lines);
                            j += lines.length - 2;
                        }
                        if(mutual) {
                            for(var k=0, len=splits.points.length; k<len; ++k) {
                                point = splits.points[k];
                                if(!point.equals(vert1)) {
                                    points.push(point);
                                    sourceParts.push(new OpenLayers.Geometry.LineString(points));
                                    if(point.equals(vert2)) {
                                        points = [];
                                    } else {
                                        points = [point.clone()];
                                    }
                                }
                            }
                        }
                    }
                }
            }
            if(mutual && sourceParts.length > 0 && points.length > 0) {
                points.push(vert2.clone());
                sourceParts.push(new OpenLayers.Geometry.LineString(points));
            }
        } else {
            results = target.splitWith(this, options);
        }
        if(targetParts && targetParts.length > 1) {
            targetSplit = true;
        } else {
            targetParts = [];
        }
        if(sourceParts && sourceParts.length > 1) {
            sourceSplit = true;
        } else {
            sourceParts = [];
        }
        if(targetSplit || sourceSplit) {
            if(mutual) {
                results = [sourceParts, targetParts];
            } else {
                results = targetParts;
            }
        }
        return results;
    },

    /**
     * Method: splitWith
     * Split this geometry (the target) with the given geometry (the source).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} A geometry used to split this
     *     geometry (the source).
     * options - {Object} Properties of this object will be used to determine
     *     how the split is conducted.
     *
     * Valid options:
     * mutual - {Boolean} Split the source geometry in addition to the target
     *     geometry.  Default is false.
     * edge - {Boolean} Allow splitting when only edges intersect.  Default is
     *     true.  If false, a vertex on the source must be within the tolerance
     *     distance of the intersection to be considered a split.
     * tolerance - {Number} If a non-null value is provided, intersections
     *     within the tolerance distance of an existing vertex on the source
     *     will be assumed to occur at the vertex.
     * 
     * Returns:
     * {Array} A list of geometries (of this same type as the target) that
     *     result from splitting the target with the source geometry.  The
     *     source and target geometry will remain unmodified.  If no split
     *     results, null will be returned.  If mutual is true and a split
     *     results, return will be an array of two arrays - the first will be
     *     all geometries that result from splitting the source geometry and
     *     the second will be all geometries that result from splitting the
     *     target geometry.
     */
    splitWith: function(geometry, options) {
        return geometry.split(this, options);

    },

    /**
     * APIMethod: getVertices
     * Return a list of all points in this geometry.
     *
     * Parameters:
     * nodes - {Boolean} For lines, only return vertices that are
     *     endpoints.  If false, for lines, only vertices that are not
     *     endpoints will be returned.  If not provided, all vertices will
     *     be returned.
     *
     * Returns:
     * {Array} A list of all vertices in the geometry.
     */
    getVertices: function(nodes) {
        var vertices;
        if(nodes === true) {
            vertices = [
                this.components[0],
                this.components[this.components.length-1]
            ];
        } else if (nodes === false) {
            vertices = this.components.slice(1, this.components.length-1);
        } else {
            vertices = this.components.slice();
        }
        return vertices;
    },

    /**
     * APIMethod: distanceTo
     * Calculate the closest distance between two geometries (on the x-y plane).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Optional properties for configuring the distance
     *     calculation.
     *
     * Valid options:
     * details - {Boolean} Return details from the distance calculation.
     *     Default is false.
     * edge - {Boolean} Calculate the distance from this geometry to the
     *     nearest edge of the target geometry.  Default is true.  If true,
     *     calling distanceTo from a geometry that is wholly contained within
     *     the target will result in a non-zero distance.  If false, whenever
     *     geometries intersect, calling distanceTo will return 0.  If false,
     *     details cannot be returned.
     *
     * Returns:
     * {Number | Object} The distance between this geometry and the target.
     *     If details is true, the return will be an object with distance,
     *     x0, y0, x1, and x2 properties.  The x0 and y0 properties represent
     *     the coordinates of the closest point on this geometry. The x1 and y1
     *     properties represent the coordinates of the closest point on the
     *     target geometry.
     */
    distanceTo: function(geometry, options) {
        var edge = !(options && options.edge === false);
        var details = edge && options && options.details;
        var result, best = {};
        var min = Number.POSITIVE_INFINITY;
        if(geometry instanceof OpenLayers.Geometry.Point) {
            var segs = this.getSortedSegments();
            var x = geometry.x;
            var y = geometry.y;
            var seg;
            for(var i=0, len=segs.length; i<len; ++i) {
                seg = segs[i];
                result = OpenLayers.Geometry.distanceToSegment(geometry, seg);
                if(result.distance < min) {
                    min = result.distance;
                    best = result;
                    if(min === 0) {
                        break;
                    }
                } else {
                    // if distance increases and we cross y0 to the right of x0, no need to keep looking.
                    if(seg.x2 > x && ((y > seg.y1 && y < seg.y2) || (y < seg.y1 && y > seg.y2))) {
                        break;
                    }
                }
            }
            if(details) {
                best = {
                    distance: best.distance,
                    x0: best.x, y0: best.y,
                    x1: x, y1: y
                };
            } else {
                best = best.distance;
            }
        } else if(geometry instanceof OpenLayers.Geometry.LineString) { 
            var segs0 = this.getSortedSegments();
            var segs1 = geometry.getSortedSegments();
            var seg0, seg1, intersection, x0, y0;
            var len1 = segs1.length;
            var interOptions = {point: true};
            outer: for(var i=0, len=segs0.length; i<len; ++i) {
                seg0 = segs0[i];
                x0 = seg0.x1;
                y0 = seg0.y1;
                for(var j=0; j<len1; ++j) {
                    seg1 = segs1[j];
                    intersection = OpenLayers.Geometry.segmentsIntersect(seg0, seg1, interOptions);
                    if(intersection) {
                        min = 0;
                        best = {
                            distance: 0,
                            x0: intersection.x, y0: intersection.y,
                            x1: intersection.x, y1: intersection.y
                        };
                        break outer;
                    } else {
                        result = OpenLayers.Geometry.distanceToSegment({x: x0, y: y0}, seg1);
                        if(result.distance < min) {
                            min = result.distance;
                            best = {
                                distance: min,
                                x0: x0, y0: y0,
                                x1: result.x, y1: result.y
                            };
                        }
                    }
                }
            }
            if(!details) {
                best = best.distance;
            }
            if(min !== 0) {
                // check the final vertex in this line's sorted segments
                if(seg0) {
                    result = geometry.distanceTo(
                        new OpenLayers.Geometry.Point(seg0.x2, seg0.y2),
                        options
                    );
                    var dist = details ? result.distance : result;
                    if(dist < min) {
                        if(details) {
                            best = {
                                distance: min,
                                x0: result.x1, y0: result.y1,
                                x1: result.x0, y1: result.y0
                            };
                        } else {
                            best = dist;
                        }
                    }
                }
            }
        } else {
            best = geometry.distanceTo(this, options);
            // swap since target comes from this line
            if(details) {
                best = {
                    distance: best.distance,
                    x0: best.x1, y0: best.y1,
                    x1: best.x0, y1: best.y0
                };
            }
        }
        return best;
    },
    
    /**
     * APIMethod: simplify
     * This function will return a simplified LineString.
     * Simplification is based on the Douglas-Peucker algorithm.
     *
     *
     * Parameters:
     * tolerance - {number} threshhold for simplification in map units
     *
     * Returns:
     * {OpenLayers.Geometry.LineString} the simplified LineString
     */
    simplify: function(tolerance){
        if (this && this !== null) {
            var points = this.getVertices();
            if (points.length < 3) {
                return this;
            }
    
            var compareNumbers = function(a, b){
                return (a-b);
            };
    
            /**
             * Private function doing the Douglas-Peucker reduction
             */
            var douglasPeuckerReduction = function(points, firstPoint, lastPoint, tolerance){
                var maxDistance = 0;
                var indexFarthest = 0;
    
                for (var index = firstPoint, distance; index < lastPoint; index++) {
                    distance = perpendicularDistance(points[firstPoint], points[lastPoint], points[index]);
                    if (distance > maxDistance) {
                        maxDistance = distance;
                        indexFarthest = index;
                    }
                }
    
                if (maxDistance > tolerance && indexFarthest != firstPoint) {
                    //Add the largest point that exceeds the tolerance
                    pointIndexsToKeep.push(indexFarthest);
                    douglasPeuckerReduction(points, firstPoint, indexFarthest, tolerance);
                    douglasPeuckerReduction(points, indexFarthest, lastPoint, tolerance);
                }
            };
    
            /**
             * Private function calculating the perpendicular distance
             * TODO: check whether OpenLayers.Geometry.LineString::distanceTo() is faster or slower
             */
            var perpendicularDistance = function(point1, point2, point){
                //Area = |(1/2)(x1y2 + x2y3 + x3y1 - x2y1 - x3y2 - x1y3)|   *Area of triangle
                //Base = v((x1-x2)²+(x1-x2)²)                               *Base of Triangle*
                //Area = .5*Base*H                                          *Solve for height
                //Height = Area/.5/Base
    
                var area = Math.abs(0.5 * (point1.x * point2.y + point2.x * point.y + point.x * point1.y - point2.x * point1.y - point.x * point2.y - point1.x * point.y));
                var bottom = Math.sqrt(Math.pow(point1.x - point2.x, 2) + Math.pow(point1.y - point2.y, 2));
                var height = area / bottom * 2;
    
                return height;
            };
    
            var firstPoint = 0;
            var lastPoint = points.length - 1;
            var pointIndexsToKeep = [];
    
            //Add the first and last index to the keepers
            pointIndexsToKeep.push(firstPoint);
            pointIndexsToKeep.push(lastPoint);
    
            //The first and the last point cannot be the same
            while (points[firstPoint].equals(points[lastPoint])) {
                lastPoint--;
                //Addition: the first point not equal to first point in the LineString is kept as well
                pointIndexsToKeep.push(lastPoint);
            }
    
            douglasPeuckerReduction(points, firstPoint, lastPoint, tolerance);
            var returnPoints = [];
            pointIndexsToKeep.sort(compareNumbers);
            for (var index = 0; index < pointIndexsToKeep.length; index++) {
                returnPoints.push(points[pointIndexsToKeep[index]]);
            }
            return new OpenLayers.Geometry.LineString(returnPoints);
    
        }
        else {
            return this;
        }
    },

    CLASS_NAME: "OpenLayers.Geometry.LineString"
});
/* ======================================================================
    OpenLayers/Geometry/MultiLineString.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/Collection.js
 * @requires OpenLayers/Geometry/LineString.js
 */

/**
 * Class: OpenLayers.Geometry.MultiLineString
 * A MultiLineString is a geometry with multiple <OpenLayers.Geometry.LineString>
 * components.
 * 
 * Inherits from:
 *  - <OpenLayers.Geometry.Collection>
 *  - <OpenLayers.Geometry> 
 */
OpenLayers.Geometry.MultiLineString = OpenLayers.Class(
  OpenLayers.Geometry.Collection, {

    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of
     * components that the collection can include.  A null value means the
     * component types are not restricted.
     */
    componentTypes: ["OpenLayers.Geometry.LineString"],

    /**
     * Constructor: OpenLayers.Geometry.MultiLineString
     * Constructor for a MultiLineString Geometry.
     *
     * Parameters: 
     * components - {Array(<OpenLayers.Geometry.LineString>)} 
     *
     */
    
    /**
     * Method: split
     * Use this geometry (the source) to attempt to split a target geometry.
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Properties of this object will be used to determine
     *     how the split is conducted.
     *
     * Valid options:
     * mutual - {Boolean} Split the source geometry in addition to the target
     *     geometry.  Default is false.
     * edge - {Boolean} Allow splitting when only edges intersect.  Default is
     *     true.  If false, a vertex on the source must be within the tolerance
     *     distance of the intersection to be considered a split.
     * tolerance - {Number} If a non-null value is provided, intersections
     *     within the tolerance distance of an existing vertex on the source
     *     will be assumed to occur at the vertex.
     * 
     * Returns:
     * {Array} A list of geometries (of this same type as the target) that
     *     result from splitting the target with the source geometry.  The
     *     source and target geometry will remain unmodified.  If no split
     *     results, null will be returned.  If mutual is true and a split
     *     results, return will be an array of two arrays - the first will be
     *     all geometries that result from splitting the source geometry and
     *     the second will be all geometries that result from splitting the
     *     target geometry.
     */
    split: function(geometry, options) {
        var results = null;
        var mutual = options && options.mutual;
        var splits, sourceLine, sourceLines, sourceSplit, targetSplit;
        var sourceParts = [];
        var targetParts = [geometry];
        for(var i=0, len=this.components.length; i<len; ++i) {
            sourceLine = this.components[i];
            sourceSplit = false;
            for(var j=0; j < targetParts.length; ++j) { 
                splits = sourceLine.split(targetParts[j], options);
                if(splits) {
                    if(mutual) {
                        sourceLines = splits[0];
                        for(var k=0, klen=sourceLines.length; k<klen; ++k) {
                            if(k===0 && sourceParts.length) {
                                sourceParts[sourceParts.length-1].addComponent(
                                    sourceLines[k]
                                );
                            } else {
                                sourceParts.push(
                                    new OpenLayers.Geometry.MultiLineString([
                                        sourceLines[k]
                                    ])
                                );
                            }
                        }
                        sourceSplit = true;
                        splits = splits[1];
                    }
                    if(splits.length) {
                        // splice in new target parts
                        splits.unshift(j, 1);
                        Array.prototype.splice.apply(targetParts, splits);
                        break;
                    }
                }
            }
            if(!sourceSplit) {
                // source line was not hit
                if(sourceParts.length) {
                    // add line to existing multi
                    sourceParts[sourceParts.length-1].addComponent(
                        sourceLine.clone()
                    );
                } else {
                    // create a fresh multi
                    sourceParts = [
                        new OpenLayers.Geometry.MultiLineString(
                            sourceLine.clone()
                        )
                    ];
                }
            }
        }
        if(sourceParts && sourceParts.length > 1) {
            sourceSplit = true;
        } else {
            sourceParts = [];
        }
        if(targetParts && targetParts.length > 1) {
            targetSplit = true;
        } else {
            targetParts = [];
        }
        if(sourceSplit || targetSplit) {
            if(mutual) {
                results = [sourceParts, targetParts];
            } else {
                results = targetParts;
            }
        }
        return results;
    },
    
    /**
     * Method: splitWith
     * Split this geometry (the target) with the given geometry (the source).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} A geometry used to split this
     *     geometry (the source).
     * options - {Object} Properties of this object will be used to determine
     *     how the split is conducted.
     *
     * Valid options:
     * mutual - {Boolean} Split the source geometry in addition to the target
     *     geometry.  Default is false.
     * edge - {Boolean} Allow splitting when only edges intersect.  Default is
     *     true.  If false, a vertex on the source must be within the tolerance
     *     distance of the intersection to be considered a split.
     * tolerance - {Number} If a non-null value is provided, intersections
     *     within the tolerance distance of an existing vertex on the source
     *     will be assumed to occur at the vertex.
     * 
     * Returns:
     * {Array} A list of geometries (of this same type as the target) that
     *     result from splitting the target with the source geometry.  The
     *     source and target geometry will remain unmodified.  If no split
     *     results, null will be returned.  If mutual is true and a split
     *     results, return will be an array of two arrays - the first will be
     *     all geometries that result from splitting the source geometry and
     *     the second will be all geometries that result from splitting the
     *     target geometry.
     */
    splitWith: function(geometry, options) {
        var results = null;
        var mutual = options && options.mutual;
        var splits, targetLine, sourceLines, sourceSplit, targetSplit, sourceParts, targetParts;
        if(geometry instanceof OpenLayers.Geometry.LineString) {
            targetParts = [];
            sourceParts = [geometry];
            for(var i=0, len=this.components.length; i<len; ++i) {
                targetSplit = false;
                targetLine = this.components[i];
                for(var j=0; j<sourceParts.length; ++j) {
                    splits = sourceParts[j].split(targetLine, options);
                    if(splits) {
                        if(mutual) {
                            sourceLines = splits[0];
                            if(sourceLines.length) {
                                // splice in new source parts
                                sourceLines.unshift(j, 1);
                                Array.prototype.splice.apply(sourceParts, sourceLines);
                                j += sourceLines.length - 2;
                            }
                            splits = splits[1];
                            if(splits.length === 0) {
                                splits = [targetLine.clone()];
                            }
                        }
                        for(var k=0, klen=splits.length; k<klen; ++k) {
                            if(k===0 && targetParts.length) {
                                targetParts[targetParts.length-1].addComponent(
                                    splits[k]
                                );
                            } else {
                                targetParts.push(
                                    new OpenLayers.Geometry.MultiLineString([
                                        splits[k]
                                    ])
                                );
                            }
                        }
                        targetSplit = true;                    
                    }
                }
                if(!targetSplit) {
                    // target component was not hit
                    if(targetParts.length) {
                        // add it to any existing multi-line
                        targetParts[targetParts.length-1].addComponent(
                            targetLine.clone()
                        );
                    } else {
                        // or start with a fresh multi-line
                        targetParts = [
                            new OpenLayers.Geometry.MultiLineString([
                                targetLine.clone()
                            ])
                        ];
                    }
                    
                }
            }
        } else {
            results = geometry.split(this);
        }
        if(sourceParts && sourceParts.length > 1) {
            sourceSplit = true;
        } else {
            sourceParts = [];
        }
        if(targetParts && targetParts.length > 1) {
            targetSplit = true;
        } else {
            targetParts = [];
        }
        if(sourceSplit || targetSplit) {
            if(mutual) {
                results = [sourceParts, targetParts];
            } else {
                results = targetParts;
            }
        }
        return results;
    },

    CLASS_NAME: "OpenLayers.Geometry.MultiLineString"
});
/* ======================================================================
    OpenLayers/Geometry/LinearRing.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/LineString.js
 */

/**
 * Class: OpenLayers.Geometry.LinearRing
 * 
 * A Linear Ring is a special LineString which is closed. It closes itself 
 * automatically on every addPoint/removePoint by adding a copy of the first
 * point as the last point. 
 * 
 * Also, as it is the first in the line family to close itself, a getArea()
 * function is defined to calculate the enclosed area of the linearRing
 * 
 * Inherits:
 *  - <OpenLayers.Geometry.LineString>
 */
OpenLayers.Geometry.LinearRing = OpenLayers.Class(
  OpenLayers.Geometry.LineString, {

    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of 
     *                 components that the collection can include.  A null 
     *                 value means the component types are not restricted.
     */
    componentTypes: ["OpenLayers.Geometry.Point"],

    /**
     * Constructor: OpenLayers.Geometry.LinearRing
     * Linear rings are constructed with an array of points.  This array
     *     can represent a closed or open ring.  If the ring is open (the last
     *     point does not equal the first point), the constructor will close
     *     the ring.  If the ring is already closed (the last point does equal
     *     the first point), it will be left closed.
     * 
     * Parameters:
     * points - {Array(<OpenLayers.Geometry.Point>)} points
     */

    /**
     * APIMethod: addComponent
     * Adds a point to geometry components.  If the point is to be added to
     *     the end of the components array and it is the same as the last point
     *     already in that array, the duplicate point is not added.  This has 
     *     the effect of closing the ring if it is not already closed, and 
     *     doing the right thing if it is already closed.  This behavior can 
     *     be overridden by calling the method with a non-null index as the 
     *     second argument.
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     * index - {Integer} Index into the array to insert the component
     * 
     * Returns:
     * {Boolean} Was the Point successfully added?
     */
    addComponent: function(point, index) {
        var added = false;

        //remove last point
        var lastPoint = this.components.pop();

        // given an index, add the point
        // without an index only add non-duplicate points
        if(index != null || !point.equals(lastPoint)) {
            added = OpenLayers.Geometry.Collection.prototype.addComponent.apply(this, 
                                                                    arguments);
        }

        //append copy of first point
        var firstPoint = this.components[0];
        OpenLayers.Geometry.Collection.prototype.addComponent.apply(this, 
                                                                [firstPoint]);
        
        return added;
    },
    
    /**
     * APIMethod: removeComponent
     * Removes a point from geometry components.
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     *
     * Returns: 
     * {Boolean} The component was removed.
     */
    removeComponent: function(point) {
        var removed = this.components && (this.components.length > 3);
        if (removed) {
            //remove last point
            this.components.pop();
            
            //remove our point
            OpenLayers.Geometry.Collection.prototype.removeComponent.apply(this, 
                                                                    arguments);
            //append copy of first point
            var firstPoint = this.components[0];
            OpenLayers.Geometry.Collection.prototype.addComponent.apply(this, 
                                                                [firstPoint]);
        }
        return removed;
    },
    
    /**
     * APIMethod: move
     * Moves a geometry by the given displacement along positive x and y axes.
     *     This modifies the position of the geometry and clears the cached
     *     bounds.
     *
     * Parameters:
     * x - {Float} Distance to move geometry in positive x direction. 
     * y - {Float} Distance to move geometry in positive y direction.
     */
    move: function(x, y) {
        for(var i = 0, len=this.components.length; i<len - 1; i++) {
            this.components[i].move(x, y);
        }
    },

    /**
     * APIMethod: rotate
     * Rotate a geometry around some origin
     *
     * Parameters:
     * angle - {Float} Rotation angle in degrees (measured counterclockwise
     *                 from the positive x-axis)
     * origin - {<OpenLayers.Geometry.Point>} Center point for the rotation
     */
    rotate: function(angle, origin) {
        for(var i=0, len=this.components.length; i<len - 1; ++i) {
            this.components[i].rotate(angle, origin);
        }
    },

    /**
     * APIMethod: resize
     * Resize a geometry relative to some origin.  Use this method to apply
     *     a uniform scaling to a geometry.
     *
     * Parameters:
     * scale - {Float} Factor by which to scale the geometry.  A scale of 2
     *                 doubles the size of the geometry in each dimension
     *                 (lines, for example, will be twice as long, and polygons
     *                 will have four times the area).
     * origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing
     * ratio - {Float} Optional x:y ratio for resizing.  Default ratio is 1.
     * 
     * Returns:
     * {<OpenLayers.Geometry>} - The current geometry. 
     */
    resize: function(scale, origin, ratio) {
        for(var i=0, len=this.components.length; i<len - 1; ++i) {
            this.components[i].resize(scale, origin, ratio);
        }
        return this;
    },
    
    /**
     * APIMethod: transform
     * Reproject the components geometry from source to dest.
     *
     * Parameters:
     * source - {<OpenLayers.Projection>}
     * dest - {<OpenLayers.Projection>}
     * 
     * Returns:
     * {<OpenLayers.Geometry>} 
     */
    transform: function(source, dest) {
        if (source && dest) {
            for (var i=0, len=this.components.length; i<len - 1; i++) {
                var component = this.components[i];
                component.transform(source, dest);
            }
            this.bounds = null;
        }
        return this;
    },
    
    /**
     * APIMethod: getCentroid
     *
     * Returns:
     * {<OpenLayers.Geometry.Point>} The centroid of the collection
     */
    getCentroid: function() {
        if (this.components && (this.components.length > 2)) {
            var sumX = 0.0;
            var sumY = 0.0;
            for (var i = 0; i < this.components.length - 1; i++) {
                var b = this.components[i];
                var c = this.components[i+1];
                sumX += (b.x + c.x) * (b.x * c.y - c.x * b.y);
                sumY += (b.y + c.y) * (b.x * c.y - c.x * b.y);
            }
            var area = -1 * this.getArea();
            var x = sumX / (6 * area);
            var y = sumY / (6 * area);
            return new OpenLayers.Geometry.Point(x, y);
        } else {
            return null;
        }
    },

    /**
     * APIMethod: getArea
     * Note - The area is positive if the ring is oriented CW, otherwise
     *         it will be negative.
     * 
     * Returns:
     * {Float} The signed area for a ring.
     */
    getArea: function() {
        var area = 0.0;
        if ( this.components && (this.components.length > 2)) {
            var sum = 0.0;
            for (var i=0, len=this.components.length; i<len - 1; i++) {
                var b = this.components[i];
                var c = this.components[i+1];
                sum += (b.x + c.x) * (c.y - b.y);
            }
            area = - sum / 2.0;
        }
        return area;
    },
    
    /**
     * APIMethod: getGeodesicArea
     * Calculate the approximate area of the polygon were it projected onto
     *     the earth.  Note that this area will be positive if ring is oriented
     *     clockwise, otherwise it will be negative.
     *
     * Parameters:
     * projection - {<OpenLayers.Projection>} The spatial reference system
     *     for the geometry coordinates.  If not provided, Geographic/WGS84 is
     *     assumed.
     * 
     * Reference:
     * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
     *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
     *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
     *
     * Returns:
     * {float} The approximate signed geodesic area of the polygon in square
     *     meters.
     */
    getGeodesicArea: function(projection) {
        var ring = this;  // so we can work with a clone if needed
        if(projection) {
            var gg = new OpenLayers.Projection("EPSG:4326");
            if(!gg.equals(projection)) {
                ring = this.clone().transform(projection, gg);
            }
        }
        var area = 0.0;
        var len = ring.components && ring.components.length;
        if(len > 2) {
            var p1, p2;
            for(var i=0; i<len-1; i++) {
                p1 = ring.components[i];
                p2 = ring.components[i+1];
                area += OpenLayers.Util.rad(p2.x - p1.x) *
                        (2 + Math.sin(OpenLayers.Util.rad(p1.y)) +
                        Math.sin(OpenLayers.Util.rad(p2.y)));
            }
            area = area * 6378137.0 * 6378137.0 / 2.0;
        }
        return area;
    },
    
    /**
     * Method: containsPoint
     * Test if a point is inside a linear ring.  For the case where a point
     *     is coincident with a linear ring edge, returns 1.  Otherwise,
     *     returns boolean.
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     *
     * Returns:
     * {Boolean | Number} The point is inside the linear ring.  Returns 1 if
     *     the point is coincident with an edge.  Returns boolean otherwise.
     */
    containsPoint: function(point) {
        var approx = OpenLayers.Number.limitSigDigs;
        var digs = 14;
        var px = approx(point.x, digs);
        var py = approx(point.y, digs);
        function getX(y, x1, y1, x2, y2) {
            return (y - y2) * ((x2 - x1) / (y2 - y1)) + x2;
        }
        var numSeg = this.components.length - 1;
        var start, end, x1, y1, x2, y2, cx, cy;
        var crosses = 0;
        for(var i=0; i<numSeg; ++i) {
            start = this.components[i];
            x1 = approx(start.x, digs);
            y1 = approx(start.y, digs);
            end = this.components[i + 1];
            x2 = approx(end.x, digs);
            y2 = approx(end.y, digs);
            
            /**
             * The following conditions enforce five edge-crossing rules:
             *    1. points coincident with edges are considered contained;
             *    2. an upward edge includes its starting endpoint, and
             *    excludes its final endpoint;
             *    3. a downward edge excludes its starting endpoint, and
             *    includes its final endpoint;
             *    4. horizontal edges are excluded; and
             *    5. the edge-ray intersection point must be strictly right
             *    of the point P.
             */
            if(y1 == y2) {
                // horizontal edge
                if(py == y1) {
                    // point on horizontal line
                    if(x1 <= x2 && (px >= x1 && px <= x2) || // right or vert
                       x1 >= x2 && (px <= x1 && px >= x2)) { // left or vert
                        // point on edge
                        crosses = -1;
                        break;
                    }
                }
                // ignore other horizontal edges
                continue;
            }
            cx = approx(getX(py, x1, y1, x2, y2), digs);
            if(cx == px) {
                // point on line
                if(y1 < y2 && (py >= y1 && py <= y2) || // upward
                   y1 > y2 && (py <= y1 && py >= y2)) { // downward
                    // point on edge
                    crosses = -1;
                    break;
                }
            }
            if(cx <= px) {
                // no crossing to the right
                continue;
            }
            if(x1 != x2 && (cx < Math.min(x1, x2) || cx > Math.max(x1, x2))) {
                // no crossing
                continue;
            }
            if(y1 < y2 && (py >= y1 && py < y2) || // upward
               y1 > y2 && (py < y1 && py >= y2)) { // downward
                ++crosses;
            }
        }
        var contained = (crosses == -1) ?
            // on edge
            1 :
            // even (out) or odd (in)
            !!(crosses & 1);

        return contained;
    },

    /**
     * APIMethod: intersects
     * Determine if the input geometry intersects this one.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} Any type of geometry.
     *
     * Returns:
     * {Boolean} The input geometry intersects this one.
     */
    intersects: function(geometry) {
        var intersect = false;
        if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
            intersect = this.containsPoint(geometry);
        } else if(geometry.CLASS_NAME == "OpenLayers.Geometry.LineString") {
            intersect = geometry.intersects(this);
        } else if(geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
            intersect = OpenLayers.Geometry.LineString.prototype.intersects.apply(
                this, [geometry]
            );
        } else {
            // check for component intersections
            for(var i=0, len=geometry.components.length; i<len; ++ i) {
                intersect = geometry.components[i].intersects(this);
                if(intersect) {
                    break;
                }
            }
        }
        return intersect;
    },

    /**
     * APIMethod: getVertices
     * Return a list of all points in this geometry.
     *
     * Parameters:
     * nodes - {Boolean} For lines, only return vertices that are
     *     endpoints.  If false, for lines, only vertices that are not
     *     endpoints will be returned.  If not provided, all vertices will
     *     be returned.
     *
     * Returns:
     * {Array} A list of all vertices in the geometry.
     */
    getVertices: function(nodes) {
        return (nodes === true) ? [] : this.components.slice(0, this.components.length-1);
    },

    CLASS_NAME: "OpenLayers.Geometry.LinearRing"
});
/* ======================================================================
    OpenLayers/Geometry/Polygon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/Collection.js
 * @requires OpenLayers/Geometry/LinearRing.js
 */

/**
 * Class: OpenLayers.Geometry.Polygon 
 * Polygon is a collection of Geometry.LinearRings. 
 * 
 * Inherits from:
 *  - <OpenLayers.Geometry.Collection> 
 *  - <OpenLayers.Geometry> 
 */
OpenLayers.Geometry.Polygon = OpenLayers.Class(
  OpenLayers.Geometry.Collection, {

    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of
     * components that the collection can include.  A null value means the
     * component types are not restricted.
     */
    componentTypes: ["OpenLayers.Geometry.LinearRing"],

    /**
     * Constructor: OpenLayers.Geometry.Polygon
     * Constructor for a Polygon geometry. 
     * The first ring (this.component[0])is the outer bounds of the polygon and 
     * all subsequent rings (this.component[1-n]) are internal holes.
     *
     *
     * Parameters:
     * components - {Array(<OpenLayers.Geometry.LinearRing>)} 
     */

    /** 
     * APIMethod: getArea
     * Calculated by subtracting the areas of the internal holes from the 
     *   area of the outer hole.
     * 
     * Returns:
     * {float} The area of the geometry
     */
    getArea: function() {
        var area = 0.0;
        if ( this.components && (this.components.length > 0)) {
            area += Math.abs(this.components[0].getArea());
            for (var i=1, len=this.components.length; i<len; i++) {
                area -= Math.abs(this.components[i].getArea());
            }
        }
        return area;
    },

    /** 
     * APIMethod: getGeodesicArea
     * Calculate the approximate area of the polygon were it projected onto
     *     the earth.
     *
     * Parameters:
     * projection - {<OpenLayers.Projection>} The spatial reference system
     *     for the geometry coordinates.  If not provided, Geographic/WGS84 is
     *     assumed.
     * 
     * Reference:
     * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
     *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
     *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
     *
     * Returns:
     * {float} The approximate geodesic area of the polygon in square meters.
     */
    getGeodesicArea: function(projection) {
        var area = 0.0;
        if(this.components && (this.components.length > 0)) {
            area += Math.abs(this.components[0].getGeodesicArea(projection));
            for(var i=1, len=this.components.length; i<len; i++) {
                area -= Math.abs(this.components[i].getGeodesicArea(projection));
            }
        }
        return area;
    },

    /**
     * Method: containsPoint
     * Test if a point is inside a polygon.  Points on a polygon edge are
     *     considered inside.
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     *
     * Returns:
     * {Boolean | Number} The point is inside the polygon.  Returns 1 if the
     *     point is on an edge.  Returns boolean otherwise.
     */
    containsPoint: function(point) {
        var numRings = this.components.length;
        var contained = false;
        if(numRings > 0) {
            // check exterior ring - 1 means on edge, boolean otherwise
            contained = this.components[0].containsPoint(point);
            if(contained !== 1) {
                if(contained && numRings > 1) {
                    // check interior rings
                    var hole;
                    for(var i=1; i<numRings; ++i) {
                        hole = this.components[i].containsPoint(point);
                        if(hole) {
                            if(hole === 1) {
                                // on edge
                                contained = 1;
                            } else {
                                // in hole
                                contained = false;
                            }                            
                            break;
                        }
                    }
                }
            }
        }
        return contained;
    },

    /**
     * APIMethod: intersects
     * Determine if the input geometry intersects this one.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} Any type of geometry.
     *
     * Returns:
     * {Boolean} The input geometry intersects this one.
     */
    intersects: function(geometry) {
        var intersect = false;
        var i, len;
        if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
            intersect = this.containsPoint(geometry);
        } else if(geometry.CLASS_NAME == "OpenLayers.Geometry.LineString" ||
                  geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
            // check if rings/linestrings intersect
            for(i=0, len=this.components.length; i<len; ++i) {
                intersect = geometry.intersects(this.components[i]);
                if(intersect) {
                    break;
                }
            }
            if(!intersect) {
                // check if this poly contains points of the ring/linestring
                for(i=0, len=geometry.components.length; i<len; ++i) {
                    intersect = this.containsPoint(geometry.components[i]);
                    if(intersect) {
                        break;
                    }
                }
            }
        } else {
            for(i=0, len=geometry.components.length; i<len; ++ i) {
                intersect = this.intersects(geometry.components[i]);
                if(intersect) {
                    break;
                }
            }
        }
        // check case where this poly is wholly contained by another
        if(!intersect && geometry.CLASS_NAME == "OpenLayers.Geometry.Polygon") {
            // exterior ring points will be contained in the other geometry
            var ring = this.components[0];
            for(i=0, len=ring.components.length; i<len; ++i) {
                intersect = geometry.containsPoint(ring.components[i]);
                if(intersect) {
                    break;
                }
            }
        }
        return intersect;
    },

    /**
     * APIMethod: distanceTo
     * Calculate the closest distance between two geometries (on the x-y plane).
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} The target geometry.
     * options - {Object} Optional properties for configuring the distance
     *     calculation.
     *
     * Valid options:
     * details - {Boolean} Return details from the distance calculation.
     *     Default is false.
     * edge - {Boolean} Calculate the distance from this geometry to the
     *     nearest edge of the target geometry.  Default is true.  If true,
     *     calling distanceTo from a geometry that is wholly contained within
     *     the target will result in a non-zero distance.  If false, whenever
     *     geometries intersect, calling distanceTo will return 0.  If false,
     *     details cannot be returned.
     *
     * Returns:
     * {Number | Object} The distance between this geometry and the target.
     *     If details is true, the return will be an object with distance,
     *     x0, y0, x1, and y1 properties.  The x0 and y0 properties represent
     *     the coordinates of the closest point on this geometry. The x1 and y1
     *     properties represent the coordinates of the closest point on the
     *     target geometry.
     */
    distanceTo: function(geometry, options) {
        var edge = !(options && options.edge === false);
        var result;
        // this is the case where we might not be looking for distance to edge
        if(!edge && this.intersects(geometry)) {
            result = 0;
        } else {
            result = OpenLayers.Geometry.Collection.prototype.distanceTo.apply(
                this, [geometry, options]
            );
        }
        return result;
    },

    CLASS_NAME: "OpenLayers.Geometry.Polygon"
});

/**
 * APIMethod: createRegularPolygon
 * Create a regular polygon around a radius. Useful for creating circles 
 * and the like.
 *
 * Parameters:
 * origin - {<OpenLayers.Geometry.Point>} center of polygon.
 * radius - {Float} distance to vertex, in map units.
 * sides - {Integer} Number of sides. 20 approximates a circle.
 * rotation - {Float} original angle of rotation, in degrees.
 */
OpenLayers.Geometry.Polygon.createRegularPolygon = function(origin, radius, sides, rotation) {  
    var angle = Math.PI * ((1/sides) - (1/2));
    if(rotation) {
        angle += (rotation / 180) * Math.PI;
    }
    var rotatedAngle, x, y;
    var points = [];
    for(var i=0; i<sides; ++i) {
        rotatedAngle = angle + (i * 2 * Math.PI / sides);
        x = origin.x + (radius * Math.cos(rotatedAngle));
        y = origin.y + (radius * Math.sin(rotatedAngle));
        points.push(new OpenLayers.Geometry.Point(x, y));
    }
    var ring = new OpenLayers.Geometry.LinearRing(points);
    return new OpenLayers.Geometry.Polygon([ring]);
};
/* ======================================================================
    OpenLayers/Geometry/MultiPolygon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Geometry/Collection.js
 * @requires OpenLayers/Geometry/Polygon.js
 */

/**
 * Class: OpenLayers.Geometry.MultiPolygon
 * MultiPolygon is a geometry with multiple <OpenLayers.Geometry.Polygon>
 * components.  Create a new instance with the <OpenLayers.Geometry.MultiPolygon>
 * constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Geometry.Collection>
 */
OpenLayers.Geometry.MultiPolygon = OpenLayers.Class(
  OpenLayers.Geometry.Collection, {

    /**
     * Property: componentTypes
     * {Array(String)} An array of class names representing the types of
     * components that the collection can include.  A null value means the
     * component types are not restricted.
     */
    componentTypes: ["OpenLayers.Geometry.Polygon"],

    /**
     * Constructor: OpenLayers.Geometry.MultiPolygon
     * Create a new MultiPolygon geometry
     *
     * Parameters:
     * components - {Array(<OpenLayers.Geometry.Polygon>)} An array of polygons
     *              used to generate the MultiPolygon
     *
     */

    CLASS_NAME: "OpenLayers.Geometry.MultiPolygon"
});
/* ======================================================================
    OpenLayers/Format/GML.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/MultiPoint.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Geometry/MultiLineString.js
 * @requires OpenLayers/Geometry/Polygon.js
 * @requires OpenLayers/Geometry/MultiPolygon.js
 */

/**
 * Class: OpenLayers.Format.GML
 * Read/Wite GML. Create a new instance with the <OpenLayers.Format.GML>
 *     constructor.  Supports the GML simple features profile.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.GML = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * APIProperty: featureNS
     * {String} Namespace used for feature attributes.  Default is
     *     "http://mapserver.gis.umn.edu/mapserver".
     */
    featureNS: "http://mapserver.gis.umn.edu/mapserver",
    
    /**
     * APIProperty: featurePrefix
     * {String} Namespace alias (or prefix) for feature nodes.  Default is
     *     "feature".
     */
    featurePrefix: "feature",
    
    /**
     * APIProperty: featureName
     * {String} Element name for features. Default is "featureMember".
     */
    featureName: "featureMember", 
    
    /**
     * APIProperty: layerName
     * {String} Name of data layer. Default is "features".
     */
    layerName: "features",
    
    /**
     * APIProperty: geometryName
     * {String} Name of geometry element.  Defaults to "geometry".
     */
    geometryName: "geometry",
    
    /** 
     * APIProperty: collectionName
     * {String} Name of featureCollection element.
     */
    collectionName: "FeatureCollection",
    
    /**
     * APIProperty: gmlns
     * {String} GML Namespace.
     */
    gmlns: "http://www.opengis.net/gml",

    /**
     * APIProperty: extractAttributes
     * {Boolean} Extract attributes from GML.
     */
    extractAttributes: true,
    
    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
     * Changing is not recommended, a new Format should be instantiated.
     */ 
    xy: true,
    
    /**
     * Constructor: OpenLayers.Format.GML
     * Create a new parser for GML.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        // compile regular expressions once instead of every time they are used
        this.regExes = {
            trimSpace: (/^\s*|\s*$/g),
            removeSpace: (/\s*/g),
            splitSpace: (/\s+/),
            trimComma: (/\s*,\s*/g)
        };
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },

    /**
     * APIMethod: read
     * Read data from a string, and return a list of features. 
     * 
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} An array of features.
     */
    read: function(data) {
        if(typeof data == "string") { 
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var featureNodes = this.getElementsByTagNameNS(data.documentElement,
                                                       this.gmlns,
                                                       this.featureName);
        var features = [];
        for(var i=0; i<featureNodes.length; i++) {
            var feature = this.parseFeature(featureNodes[i]);
            if(feature) {
                features.push(feature);
            }
        }
        return features;
    },
    
    /**
     * Method: parseFeature
     * This function is the core of the GML parsing code in OpenLayers.
     *    It creates the geometries that are then attached to the returned
     *    feature, and calls parseAttributes() to get attribute data out.
     *    
     * Parameters:
     * node - {DOMElement} A GML feature node. 
     */
    parseFeature: function(node) {
        // only accept one geometry per feature - look for highest "order"
        var order = ["MultiPolygon", "Polygon",
                     "MultiLineString", "LineString",
                     "MultiPoint", "Point", "Envelope"];
        // FIXME: In case we parse a feature with no geometry, but boundedBy an Envelope,
        // this code creates a geometry derived from the Envelope. This is not correct.
        var type, nodeList, geometry, parser;
        for(var i=0; i<order.length; ++i) {
            type = order[i];
            nodeList = this.getElementsByTagNameNS(node, this.gmlns, type);
            if(nodeList.length > 0) {
                // only deal with first geometry of this type
                parser = this.parseGeometry[type.toLowerCase()];
                if(parser) {
                    geometry = parser.apply(this, [nodeList[0]]);
                    if (this.internalProjection && this.externalProjection) {
                        geometry.transform(this.externalProjection, 
                                           this.internalProjection); 
                    }                       
                } else {
                    throw new TypeError("Unsupported geometry type: " + type);
                }
                // stop looking for different geometry types
                break;
            }
        }

        var bounds;
        var boxNodes = this.getElementsByTagNameNS(node, this.gmlns, "Box");
        for(i=0; i<boxNodes.length; ++i) {
            var boxNode = boxNodes[i];
            var box = this.parseGeometry["box"].apply(this, [boxNode]);
            var parentNode = boxNode.parentNode;
            var parentName = parentNode.localName ||
                             parentNode.nodeName.split(":").pop();
            if(parentName === "boundedBy") {
                bounds = box;
            } else {
                geometry = box.toGeometry();
            }
        }
        
        // construct feature (optionally with attributes)
        var attributes;
        if(this.extractAttributes) {
            attributes = this.parseAttributes(node);
        }
        var feature = new OpenLayers.Feature.Vector(geometry, attributes);
        feature.bounds = bounds;
        
        feature.gml = {
            featureType: node.firstChild.nodeName.split(":")[1],
            featureNS: node.firstChild.namespaceURI,
            featureNSPrefix: node.firstChild.prefix
        };
                
        // assign fid - this can come from a "fid" or "id" attribute
        var childNode = node.firstChild;
        var fid;
        while(childNode) {
            if(childNode.nodeType == 1) {
                fid = childNode.getAttribute("fid") ||
                      childNode.getAttribute("id");
                if(fid) {
                    break;
                }
            }
            childNode = childNode.nextSibling;
        }
        feature.fid = fid;
        return feature;
    },
    
    /**
     * Property: parseGeometry
     * Properties of this object are the functions that parse geometries based
     *     on their type.
     */
    parseGeometry: {
        
        /**
         * Method: parseGeometry.point
         * Given a GML node representing a point geometry, create an OpenLayers
         *     point geometry.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Geometry.Point>} A point geometry.
         */
        point: function(node) {
            /**
             * Three coordinate variations to consider:
             * 1) <gml:pos>x y z</gml:pos>
             * 2) <gml:coordinates>x, y, z</gml:coordinates>
             * 3) <gml:coord><gml:X>x</gml:X><gml:Y>y</gml:Y></gml:coord>
             */
            var nodeList, coordString;
            var coords = [];

            // look for <gml:pos>
            var nodeList = this.getElementsByTagNameNS(node, this.gmlns, "pos");
            if(nodeList.length > 0) {
                coordString = nodeList[0].firstChild.nodeValue;
                coordString = coordString.replace(this.regExes.trimSpace, "");
                coords = coordString.split(this.regExes.splitSpace);
            }

            // look for <gml:coordinates>
            if(coords.length == 0) {
                nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "coordinates");
                if(nodeList.length > 0) {
                    coordString = nodeList[0].firstChild.nodeValue;
                    coordString = coordString.replace(this.regExes.removeSpace,
                                                      "");
                    coords = coordString.split(",");
                }
            }

            // look for <gml:coord>
            if(coords.length == 0) {
                nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "coord");
                if(nodeList.length > 0) {
                    var xList = this.getElementsByTagNameNS(nodeList[0],
                                                            this.gmlns, "X");
                    var yList = this.getElementsByTagNameNS(nodeList[0],
                                                            this.gmlns, "Y");
                    if(xList.length > 0 && yList.length > 0) {
                        coords = [xList[0].firstChild.nodeValue,
                                  yList[0].firstChild.nodeValue];
                    }
                }
            }
                
            // preserve third dimension
            if(coords.length == 2) {
                coords[2] = null;
            }
            
            if (this.xy) {
                return new OpenLayers.Geometry.Point(coords[0], coords[1],
                                                 coords[2]);
            }
            else{
                return new OpenLayers.Geometry.Point(coords[1], coords[0],
                                                 coords[2]);
            }
        },
        
        /**
         * Method: parseGeometry.multipoint
         * Given a GML node representing a multipoint geometry, create an
         *     OpenLayers multipoint geometry.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Geometry.MultiPoint>} A multipoint geometry.
         */
        multipoint: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "Point");
            var components = [];
            if(nodeList.length > 0) {
                var point;
                for(var i=0; i<nodeList.length; ++i) {
                    point = this.parseGeometry.point.apply(this, [nodeList[i]]);
                    if(point) {
                        components.push(point);
                    }
                }
            }
            return new OpenLayers.Geometry.MultiPoint(components);
        },
        
        /**
         * Method: parseGeometry.linestring
         * Given a GML node representing a linestring geometry, create an
         *     OpenLayers linestring geometry.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Geometry.LineString>} A linestring geometry.
         */
        linestring: function(node, ring) {
            /**
             * Two coordinate variations to consider:
             * 1) <gml:posList dimension="d">x0 y0 z0 x1 y1 z1</gml:posList>
             * 2) <gml:coordinates>x0, y0, z0 x1, y1, z1</gml:coordinates>
             */
            var nodeList, coordString;
            var coords = [];
            var points = [];

            // look for <gml:posList>
            nodeList = this.getElementsByTagNameNS(node, this.gmlns, "posList");
            if(nodeList.length > 0) {
                coordString = this.getChildValue(nodeList[0]);
                coordString = coordString.replace(this.regExes.trimSpace, "");
                coords = coordString.split(this.regExes.splitSpace);
                var dim = parseInt(nodeList[0].getAttribute("dimension"));
                var j, x, y, z;
                for(var i=0; i<coords.length/dim; ++i) {
                    j = i * dim;
                    x = coords[j];
                    y = coords[j+1];
                    z = (dim == 2) ? null : coords[j+2];
                    if (this.xy) {
                        points.push(new OpenLayers.Geometry.Point(x, y, z));
                    } else {
                        points.push(new OpenLayers.Geometry.Point(y, x, z));
                    }
                }
            }

            // look for <gml:coordinates>
            if(coords.length == 0) {
                nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "coordinates");
                if(nodeList.length > 0) {
                    coordString = this.getChildValue(nodeList[0]);
                    coordString = coordString.replace(this.regExes.trimSpace,
                                                      "");
                    coordString = coordString.replace(this.regExes.trimComma,
                                                      ",");
                    var pointList = coordString.split(this.regExes.splitSpace);
                    for(var i=0; i<pointList.length; ++i) {
                        coords = pointList[i].split(",");
                        if(coords.length == 2) {
                            coords[2] = null;
                        }
                        if (this.xy) {
                            points.push(new OpenLayers.Geometry.Point(coords[0],
                                                                  coords[1],
                                                                  coords[2]));
                        } else {
                            points.push(new OpenLayers.Geometry.Point(coords[1],
                                                                  coords[0],
                                                                  coords[2]));
                        }
                    }
                }
            }

            var line = null;
            if(points.length != 0) {
                if(ring) {
                    line = new OpenLayers.Geometry.LinearRing(points);
                } else {
                    line = new OpenLayers.Geometry.LineString(points);
                }
            }
            return line;
        },
        
        /**
         * Method: parseGeometry.multilinestring
         * Given a GML node representing a multilinestring geometry, create an
         *     OpenLayers multilinestring geometry.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Geometry.MultiLineString>} A multilinestring geometry.
         */
        multilinestring: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "LineString");
            var components = [];
            if(nodeList.length > 0) {
                var line;
                for(var i=0; i<nodeList.length; ++i) {
                    line = this.parseGeometry.linestring.apply(this,
                                                               [nodeList[i]]);
                    if(line) {
                        components.push(line);
                    }
                }
            }
            return new OpenLayers.Geometry.MultiLineString(components);
        },
        
        /**
         * Method: parseGeometry.polygon
         * Given a GML node representing a polygon geometry, create an
         *     OpenLayers polygon geometry.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Geometry.Polygon>} A polygon geometry.
         */
        polygon: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "LinearRing");
            var components = [];
            if(nodeList.length > 0) {
                // this assumes exterior ring first, inner rings after
                var ring;
                for(var i=0; i<nodeList.length; ++i) {
                    ring = this.parseGeometry.linestring.apply(this,
                                                        [nodeList[i], true]);
                    if(ring) {
                        components.push(ring);
                    }
                }
            }
            return new OpenLayers.Geometry.Polygon(components);
        },
        
        /**
         * Method: parseGeometry.multipolygon
         * Given a GML node representing a multipolygon geometry, create an
         *     OpenLayers multipolygon geometry.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Geometry.MultiPolygon>} A multipolygon geometry.
         */
        multipolygon: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                       "Polygon");
            var components = [];
            if(nodeList.length > 0) {
                var polygon;
                for(var i=0; i<nodeList.length; ++i) {
                    polygon = this.parseGeometry.polygon.apply(this,
                                                               [nodeList[i]]);
                    if(polygon) {
                        components.push(polygon);
                    }
                }
            }
            return new OpenLayers.Geometry.MultiPolygon(components);
        },
        
        envelope: function(node) {
            var components = [];
            var coordString;
            var envelope;
            
            var lpoint = this.getElementsByTagNameNS(node, this.gmlns, "lowerCorner");
            if (lpoint.length > 0) {
                var coords = [];
                
                if(lpoint.length > 0) {
                    coordString = lpoint[0].firstChild.nodeValue;
                    coordString = coordString.replace(this.regExes.trimSpace, "");
                    coords = coordString.split(this.regExes.splitSpace);
                }
                
                if(coords.length == 2) {
                    coords[2] = null;
                }
                if (this.xy) {
                    var lowerPoint = new OpenLayers.Geometry.Point(coords[0], coords[1],coords[2]);
                } else {
                    var lowerPoint = new OpenLayers.Geometry.Point(coords[1], coords[0],coords[2]);
                }
            }
            
            var upoint = this.getElementsByTagNameNS(node, this.gmlns, "upperCorner");
            if (upoint.length > 0) {
                var coords = [];
                
                if(upoint.length > 0) {
                    coordString = upoint[0].firstChild.nodeValue;
                    coordString = coordString.replace(this.regExes.trimSpace, "");
                    coords = coordString.split(this.regExes.splitSpace);
                }
                
                if(coords.length == 2) {
                    coords[2] = null;
                }
                if (this.xy) {
                    var upperPoint = new OpenLayers.Geometry.Point(coords[0], coords[1],coords[2]);
                } else {
                    var upperPoint = new OpenLayers.Geometry.Point(coords[1], coords[0],coords[2]);
                }
            }
            
            if (lowerPoint && upperPoint) {
                components.push(new OpenLayers.Geometry.Point(lowerPoint.x, lowerPoint.y));
                components.push(new OpenLayers.Geometry.Point(upperPoint.x, lowerPoint.y));
                components.push(new OpenLayers.Geometry.Point(upperPoint.x, upperPoint.y));
                components.push(new OpenLayers.Geometry.Point(lowerPoint.x, upperPoint.y));
                components.push(new OpenLayers.Geometry.Point(lowerPoint.x, lowerPoint.y));
                
                var ring = new OpenLayers.Geometry.LinearRing(components);
                envelope = new OpenLayers.Geometry.Polygon([ring]);
            }
            return envelope; 
        },

        /**
         * Method: parseGeometry.box
         * Given a GML node representing a box geometry, create an
         *     OpenLayers.Bounds.
         *
         * Parameters:
         * node - {DOMElement} A GML node.
         *
         * Returns:
         * {<OpenLayers.Bounds>} A bounds representing the box.
         */
        box: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.gmlns,
                                                   "coordinates");
            var coordString;
            var coords, beginPoint = null, endPoint = null;
            if (nodeList.length > 0) {
                coordString = nodeList[0].firstChild.nodeValue;
                coords = coordString.split(" ");
                if (coords.length == 2) {
                    beginPoint = coords[0].split(",");
                    endPoint = coords[1].split(",");
                }
            }
            if (beginPoint !== null && endPoint !== null) {
                return new OpenLayers.Bounds(parseFloat(beginPoint[0]),
                    parseFloat(beginPoint[1]),
                    parseFloat(endPoint[0]),
                    parseFloat(endPoint[1]) );
            }
        }
        
    },
    
    /**
     * Method: parseAttributes
     *
     * Parameters:
     * node - {DOMElement}
     *
     * Returns:
     * {Object} An attributes object.
     */
    parseAttributes: function(node) {
        var attributes = {};
        // assume attributes are children of the first type 1 child
        var childNode = node.firstChild;
        var children, i, child, grandchildren, grandchild, name, value;
        while(childNode) {
            if(childNode.nodeType == 1) {
                // attributes are type 1 children with one type 3 child
                children = childNode.childNodes;
                for(i=0; i<children.length; ++i) {
                    child = children[i];
                    if(child.nodeType == 1) {
                        grandchildren = child.childNodes;
                        if(grandchildren.length == 1) {
                            grandchild = grandchildren[0];
                            if(grandchild.nodeType == 3 ||
                               grandchild.nodeType == 4) {
                                name = (child.prefix) ?
                                        child.nodeName.split(":")[1] :
                                        child.nodeName;
                                value = grandchild.nodeValue.replace(
                                                this.regExes.trimSpace, "");
                                attributes[name] = value;
                            }
                        } else {
                            // If child has no childNodes (grandchildren),
                            // set an attribute with null value.
                            // e.g. <prefix:fieldname/> becomes
                            // {fieldname: null}
                            attributes[child.nodeName.split(":").pop()] = null;
                        }
                    }
                }
                break;
            }
            childNode = childNode.nextSibling;
        }
        return attributes;
    },
    
    /**
     * APIMethod: write
     * Generate a GML document string given a list of features. 
     * 
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} List of features to
     *     serialize into a string.
     *
     * Returns:
     * {String} A string representing the GML document.
     */
    write: function(features) {
        if(!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        var gml = this.createElementNS("http://www.opengis.net/wfs",
                                       "wfs:" + this.collectionName);
        for(var i=0; i<features.length; i++) {
            gml.appendChild(this.createFeatureXML(features[i]));
        }
        return OpenLayers.Format.XML.prototype.write.apply(this, [gml]);
    },

    /** 
     * Method: createFeatureXML
     * Accept an OpenLayers.Feature.Vector, and build a GML node for it.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature to be built as GML.
     *
     * Returns:
     * {DOMElement} A node reprensting the feature in GML.
     */
    createFeatureXML: function(feature) {
        var geometry = feature.geometry;
        var geometryNode = this.buildGeometryNode(geometry);
        var geomContainer = this.createElementNS(this.featureNS,
                                                 this.featurePrefix + ":" +
                                                 this.geometryName);
        geomContainer.appendChild(geometryNode);
        var featureNode = this.createElementNS(this.gmlns,
                                               "gml:" + this.featureName);
        var featureContainer = this.createElementNS(this.featureNS,
                                                    this.featurePrefix + ":" +
                                                    this.layerName);
        var fid = feature.fid || feature.id;
        featureContainer.setAttribute("fid", fid);
        featureContainer.appendChild(geomContainer);
        for(var attr in feature.attributes) {
            var attrText = this.createTextNode(feature.attributes[attr]); 
            var nodename = attr.substring(attr.lastIndexOf(":") + 1);
            var attrContainer = this.createElementNS(this.featureNS,
                                                     this.featurePrefix + ":" +
                                                     nodename);
            attrContainer.appendChild(attrText);
            featureContainer.appendChild(attrContainer);
        }    
        featureNode.appendChild(featureContainer);
        return featureNode;
    },
    
    /**
     * APIMethod: buildGeometryNode
     */
    buildGeometryNode: function(geometry) {
        if (this.externalProjection && this.internalProjection) {
            geometry = geometry.clone();
            geometry.transform(this.internalProjection, 
                               this.externalProjection);
        }    
        var className = geometry.CLASS_NAME;
        var type = className.substring(className.lastIndexOf(".") + 1);
        var builder = this.buildGeometry[type.toLowerCase()];
        return builder.apply(this, [geometry]);
    },

    /**
     * Property: buildGeometry
     * Object containing methods to do the actual geometry node building
     *     based on geometry type.
     */
    buildGeometry: {
        // TBD retrieve the srs from layer
        // srsName is non-standard, so not including it until it's right.
        // gml.setAttribute("srsName",
        //                  "http://www.opengis.net/gml/srs/epsg.xml#4326");

        /**
         * Method: buildGeometry.point
         * Given an OpenLayers point geometry, create a GML point.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Point>} A point geometry.
         *
         * Returns:
         * {DOMElement} A GML point node.
         */
        point: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:Point");
            gml.appendChild(this.buildCoordinatesNode(geometry));
            return gml;
        },
        
        /**
         * Method: buildGeometry.multipoint
         * Given an OpenLayers multipoint geometry, create a GML multipoint.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.MultiPoint>} A multipoint geometry.
         *
         * Returns:
         * {DOMElement} A GML multipoint node.
         */
        multipoint: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:MultiPoint");
            var points = geometry.components;
            var pointMember, pointGeom;
            for(var i=0; i<points.length; i++) { 
                pointMember = this.createElementNS(this.gmlns,
                                                   "gml:pointMember");
                pointGeom = this.buildGeometry.point.apply(this,
                                                               [points[i]]);
                pointMember.appendChild(pointGeom);
                gml.appendChild(pointMember);
            }
            return gml;            
        },
        
        /**
         * Method: buildGeometry.linestring
         * Given an OpenLayers linestring geometry, create a GML linestring.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.LineString>} A linestring geometry.
         *
         * Returns:
         * {DOMElement} A GML linestring node.
         */
        linestring: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:LineString");
            gml.appendChild(this.buildCoordinatesNode(geometry));
            return gml;
        },
        
        /**
         * Method: buildGeometry.multilinestring
         * Given an OpenLayers multilinestring geometry, create a GML
         *     multilinestring.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.MultiLineString>} A multilinestring
         *     geometry.
         *
         * Returns:
         * {DOMElement} A GML multilinestring node.
         */
        multilinestring: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:MultiLineString");
            var lines = geometry.components;
            var lineMember, lineGeom;
            for(var i=0; i<lines.length; ++i) {
                lineMember = this.createElementNS(this.gmlns,
                                                  "gml:lineStringMember");
                lineGeom = this.buildGeometry.linestring.apply(this,
                                                                   [lines[i]]);
                lineMember.appendChild(lineGeom);
                gml.appendChild(lineMember);
            }
            return gml;
        },
        
        /**
         * Method: buildGeometry.linearring
         * Given an OpenLayers linearring geometry, create a GML linearring.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.LinearRing>} A linearring geometry.
         *
         * Returns:
         * {DOMElement} A GML linearring node.
         */
        linearring: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:LinearRing");
            gml.appendChild(this.buildCoordinatesNode(geometry));
            return gml;
        },
        
        /**
         * Method: buildGeometry.polygon
         * Given an OpenLayers polygon geometry, create a GML polygon.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Polygon>} A polygon geometry.
         *
         * Returns:
         * {DOMElement} A GML polygon node.
         */
        polygon: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:Polygon");
            var rings = geometry.components;
            var ringMember, ringGeom, type;
            for(var i=0; i<rings.length; ++i) {
                type = (i==0) ? "outerBoundaryIs" : "innerBoundaryIs";
                ringMember = this.createElementNS(this.gmlns,
                                                  "gml:" + type);
                ringGeom = this.buildGeometry.linearring.apply(this,
                                                                   [rings[i]]);
                ringMember.appendChild(ringGeom);
                gml.appendChild(ringMember);
            }
            return gml;
        },
        
        /**
         * Method: buildGeometry.multipolygon
         * Given an OpenLayers multipolygon geometry, create a GML multipolygon.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.MultiPolygon>} A multipolygon
         *     geometry.
         *
         * Returns:
         * {DOMElement} A GML multipolygon node.
         */
        multipolygon: function(geometry) {
            var gml = this.createElementNS(this.gmlns, "gml:MultiPolygon");
            var polys = geometry.components;
            var polyMember, polyGeom;
            for(var i=0; i<polys.length; ++i) {
                polyMember = this.createElementNS(this.gmlns,
                                                  "gml:polygonMember");
                polyGeom = this.buildGeometry.polygon.apply(this,
                                                                [polys[i]]);
                polyMember.appendChild(polyGeom);
                gml.appendChild(polyMember);
            }
            return gml;

        },
 
        /**
         * Method: buildGeometry.bounds
         * Given an OpenLayers bounds, create a GML box.
         *
         * Parameters:
         * bounds - {<OpenLayers.Geometry.Bounds>} A bounds object.
         *
         * Returns:
         * {DOMElement} A GML box node.
         */
        bounds: function(bounds) {
            var gml = this.createElementNS(this.gmlns, "gml:Box");
            gml.appendChild(this.buildCoordinatesNode(bounds));
            return gml;
        }
    },

    /**
     * Method: buildCoordinates
     * builds the coordinates XmlNode
     * (code)
     * <gml:coordinates decimal="." cs="," ts=" ">...</gml:coordinates>
     * (end)
     *
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>} 
     *
     * Returns:
     * {XmlNode} created xmlNode
     */
    buildCoordinatesNode: function(geometry) {
        var coordinatesNode = this.createElementNS(this.gmlns,
                                                   "gml:coordinates");
        coordinatesNode.setAttribute("decimal", ".");
        coordinatesNode.setAttribute("cs", ",");
        coordinatesNode.setAttribute("ts", " ");

        var parts = [];

        if(geometry instanceof OpenLayers.Bounds){
            parts.push(geometry.left + "," + geometry.bottom);
            parts.push(geometry.right + "," + geometry.top);
        } else {
            var points = (geometry.components) ? geometry.components : [geometry];
            for(var i=0; i<points.length; i++) {
                parts.push(points[i].x + "," + points[i].y);                
            }            
        }

        var txtNode = this.createTextNode(parts.join(" "));
        coordinatesNode.appendChild(txtNode);
        
        return coordinatesNode;
    },

    CLASS_NAME: "OpenLayers.Format.GML" 
});
/* ======================================================================
    OpenLayers/Format/GML/Base.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/GML.js
 */

/**
 * Though required in the full build, if the GML format is excluded, we set
 * the namespace here.
 */
if(!OpenLayers.Format.GML) {
    OpenLayers.Format.GML = {};
}

/**
 * Class: OpenLayers.Format.GML.Base
 * Superclass for GML parsers.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.GML.Base = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        gml: "http://www.opengis.net/gml",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance",
        wfs: "http://www.opengis.net/wfs" // this is a convenience for reading wfs:FeatureCollection
    },
    
    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "gml",

    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocation: null,
    
    /**
     * APIProperty: featureType
     * {Array(String) or String} The local (without prefix) feature typeName(s).
     */
    featureType: null,
    
    /**
     * APIProperty: featureNS
     * {String} The feature namespace.  Must be set in the options at
     *     construction.
     */
    featureNS: null,

    /**
     * APIProperty: geometry
     * {String} Name of geometry element.  Defaults to "geometry". If null, it
     * will be set on <read> when the first geometry is parsed.
     */
    geometryName: "geometry",

    /**
     * APIProperty: extractAttributes
     * {Boolean} Extract attributes from GML.  Default is true.
     */
    extractAttributes: true,
    
    /**
     * APIProperty: srsName
     * {String} URI for spatial reference system.  This is optional for
     *     single part geometries and mandatory for collections and multis.
     *     If set, the srsName attribute will be written for all geometries.
     *     Default is null.
     */
    srsName: null,

    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
     * Changing is not recommended, a new Format should be instantiated.
     */ 
    xy: true,

    /**
     * Property: geometryTypes
     * {Object} Maps OpenLayers geometry class names to GML element names.
     *     Use <setGeometryTypes> before accessing this property.
     */
    geometryTypes: null,

    /**
     * Property: singleFeatureType
     * {Boolean} True if there is only 1 featureType, and not an array
     *     of featuretypes.
     */
    singleFeatureType: null,
    
    /**
     * Property: autoConfig
     * {Boolean} Indicates if the format was configured without a <featureNS>,
     * but auto-configured <featureNS> and <featureType> during read.
     * Subclasses making use of <featureType> auto-configuration should make
     * the first call to the <readNode> method (usually in the read method)
     * with true as 3rd argument, so the auto-configured featureType can be
     * reset and the format can be reused for subsequent reads with data from
     * different featureTypes. Set to false after read if you want to keep the
     * auto-configured values.
     */

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g),
        featureMember: (/^(.*:)?featureMembers?$/)
    },

    /**
     * Constructor: OpenLayers.Format.GML.Base
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.GML.v2> or <OpenLayers.Format.GML.v3> constructor
     *     instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     *
     * Valid options properties:
     * featureType - {Array(String) or String} Local (without prefix) feature 
     *     typeName(s) (required for write).
     * featureNS - {String} Feature namespace (required for write).
     * geometryName - {String} Geometry element name (required for write).
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
        this.setGeometryTypes();
        if(options && options.featureNS) {
            this.setNamespace("feature", options.featureNS);
        }
        this.singleFeatureType = !options || (typeof options.featureType === "string");
    },
    
    /**
     * Method: read
     *
     * Parameters:
     * data - {DOMElement} A gml:featureMember element, a gml:featureMembers
     *     element, or an element containing either of the above at any level.
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} An array of features.
     */
    read: function(data) {
        if(typeof data == "string") { 
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var features = [];
        this.readNode(data, {features: features}, true);
        if(features.length == 0) {
            // look for gml:featureMember elements
            var elements = this.getElementsByTagNameNS(
                data, this.namespaces.gml, "featureMember"
            );
            if(elements.length) {
                for(var i=0, len=elements.length; i<len; ++i) {
                    this.readNode(elements[i], {features: features}, true);
                }
            } else {
                // look for gml:featureMembers elements (this is v3, but does no harm here)
                var elements = this.getElementsByTagNameNS(
                    data, this.namespaces.gml, "featureMembers"
                );
                if(elements.length) {
                    // there can be only one
                    this.readNode(elements[0], {features: features}, true);
                }
            }
        }
        return features;
    },
    
    /**
     * Method: readNode
     * Shorthand for applying one of the named readers given the node
     *     namespace and local name.  Readers take two args (node, obj) and
     *     generally extend or modify the second.
     *
     * Parameters:
     * node - {DOMElement} The node to be read (required).
     * obj - {Object} The object to be modified (optional).
     * first - {Boolean} Should be set to true for the first node read. This
     *     is usually the readNode call in the read method. Without this being
     *     set, auto-configured properties will stick on subsequent reads.
     *
     * Returns:
     * {Object} The input object, modified (or a new one if none was provided).
     */
    readNode: function(node, obj, first) {
        // on subsequent calls of format.read(), we want to reset auto-
        // configured properties and auto-configure again.
        if (first === true && this.autoConfig === true) {
            this.featureType = null;
            delete this.namespaceAlias[this.featureNS];
            delete this.namespaces["feature"];
            this.featureNS = null;
        }
        // featureType auto-configuration
        if (!this.featureNS && (!(node.prefix in this.namespaces) &&
                node.parentNode.namespaceURI == this.namespaces["gml"] &&
                this.regExes.featureMember.test(node.parentNode.nodeName))) {
            this.featureType = node.nodeName.split(":").pop();
            this.setNamespace("feature", node.namespaceURI);
            this.featureNS = node.namespaceURI;
            this.autoConfig = true;
        }
        return OpenLayers.Format.XML.prototype.readNode.apply(this, [node, obj]);
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "gml": {
            "featureMember": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "featureMembers": function(node, obj) {
                this.readChildNodes(node, obj);                
            },
            "name": function(node, obj) {
                obj.name = this.getChildValue(node);
            },
            "boundedBy": function(node, obj) {
                var container = {};
                this.readChildNodes(node, container);
                if(container.components && container.components.length > 0) {
                    obj.bounds = container.components[0];
                }
            },
            "Point": function(node, container) {
                var obj = {points: []};
                this.readChildNodes(node, obj);
                if(!container.components) {
                    container.components = [];
                }
                container.components.push(obj.points[0]);
            },
            "coordinates": function(node, obj) {
                var str = this.getChildValue(node).replace(
                    this.regExes.trimSpace, ""
                );
                str = str.replace(this.regExes.trimComma, ",");
                var pointList = str.split(this.regExes.splitSpace);
                var coords;
                var numPoints = pointList.length;
                var points = new Array(numPoints);
                for(var i=0; i<numPoints; ++i) {
                    coords = pointList[i].split(",");
                    if (this.xy) {
                        points[i] = new OpenLayers.Geometry.Point(
                            coords[0], coords[1], coords[2]
                        );
                    } else {
                        points[i] = new OpenLayers.Geometry.Point(
                            coords[1], coords[0], coords[2]
                        );
                    }
                }
                obj.points = points;
            },
            "coord": function(node, obj) {
                var coord = {};
                this.readChildNodes(node, coord);
                if(!obj.points) {
                    obj.points = [];
                }
                obj.points.push(new OpenLayers.Geometry.Point(
                    coord.x, coord.y, coord.z
                ));
            },
            "X": function(node, coord) {
                coord.x = this.getChildValue(node);
            },
            "Y": function(node, coord) {
                coord.y = this.getChildValue(node);
            },
            "Z": function(node, coord) {
                coord.z = this.getChildValue(node);
            },
            "MultiPoint": function(node, container) {
                var obj = {components: []};
                this.readChildNodes(node, obj);
                container.components = [
                    new OpenLayers.Geometry.MultiPoint(obj.components)
                ];
            },
            "pointMember": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "LineString": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                if(!container.components) {
                    container.components = [];
                }
                container.components.push(
                    new OpenLayers.Geometry.LineString(obj.points)
                );
            },
            "MultiLineString": function(node, container) {
                var obj = {components: []};
                this.readChildNodes(node, obj);
                container.components = [
                    new OpenLayers.Geometry.MultiLineString(obj.components)
                ];
            },
            "lineStringMember": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Polygon": function(node, container) {
                var obj = {outer: null, inner: []};
                this.readChildNodes(node, obj);
                obj.inner.unshift(obj.outer);
                if(!container.components) {
                    container.components = [];
                }
                container.components.push(
                    new OpenLayers.Geometry.Polygon(obj.inner)
                );
            },
            "LinearRing": function(node, obj) {
                var container = {};
                this.readChildNodes(node, container);
                obj.components = [new OpenLayers.Geometry.LinearRing(
                    container.points
                )];
            },
            "MultiPolygon": function(node, container) {
                var obj = {components: []};
                this.readChildNodes(node, obj);
                container.components = [
                    new OpenLayers.Geometry.MultiPolygon(obj.components)
                ];
            },
            "polygonMember": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "GeometryCollection": function(node, container) {
                var obj = {components: []};
                this.readChildNodes(node, obj);
                container.components = [
                    new OpenLayers.Geometry.Collection(obj.components)
                ];
            },
            "geometryMember": function(node, obj) {
                this.readChildNodes(node, obj);
            }
        },
        "feature": {
            "*": function(node, obj) {
                // The node can either be named like the featureType, or it
                // can be a child of the feature:featureType.  Children can be
                // geometry or attributes.
                var name;
                var local = node.localName || node.nodeName.split(":").pop();
                // Since an attribute can have the same name as the feature type
                // we only want to read the node as a feature if the parent
                // node can have feature nodes as children.  In this case, the
                // obj.features property is set.
                if (obj.features) {
                    if (!this.singleFeatureType &&
                        (OpenLayers.Util.indexOf(this.featureType, local) !== -1)) {
                        name = "_typeName";
                    } else if(local === this.featureType) {
                        name = "_typeName";
                    }
                } else {
                    // Assume attribute elements have one child node and that the child
                    // is a text node.  Otherwise assume it is a geometry node.
                    if(node.childNodes.length == 0 ||
                       (node.childNodes.length == 1 && node.firstChild.nodeType == 3)) {
                        if(this.extractAttributes) {
                            name = "_attribute";
                        }
                    } else {
                        name = "_geometry";
                    }
                }
                if(name) {
                    this.readers.feature[name].apply(this, [node, obj]);
                }
            },
            "_typeName": function(node, obj) {
                var container = {components: [], attributes: {}};
                this.readChildNodes(node, container);
                // look for common gml namespaced elements
                if(container.name) {
                    container.attributes.name = container.name;
                }
                var feature = new OpenLayers.Feature.Vector(
                    container.components[0], container.attributes
                );
                if (!this.singleFeatureType) {
                    feature.type = node.nodeName.split(":").pop();
                    feature.namespace = node.namespaceURI;
                }
                var fid = node.getAttribute("fid") ||
                    this.getAttributeNS(node, this.namespaces["gml"], "id");
                if(fid) {
                    feature.fid = fid;
                }
                if(this.internalProjection && this.externalProjection &&
                   feature.geometry) {
                    feature.geometry.transform(
                        this.externalProjection, this.internalProjection
                    );
                }
                if(container.bounds) {
                    feature.bounds = container.bounds;
                }
                obj.features.push(feature);
            },
            "_geometry": function(node, obj) {
                if (!this.geometryName) {
                    this.geometryName = node.nodeName.split(":").pop();
                }
                this.readChildNodes(node, obj);
            },
            "_attribute": function(node, obj) {
                var local = node.localName || node.nodeName.split(":").pop();
                var value = this.getChildValue(node);
                obj.attributes[local] = value;
            }
        },
        "wfs": {
            "FeatureCollection": function(node, obj) {
                this.readChildNodes(node, obj);
            }
        }
    },
    
    /**
     * Method: write
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>) | OpenLayers.Feature.Vector}
     *     An array of features or a single feature.
     *
     * Returns:
     * {String} Given an array of features, a doc with a gml:featureMembers
     *     element will be returned.  Given a single feature, a doc with a
     *     gml:featureMember element will be returned.
     */
    write: function(features) {
        var name;
        if(OpenLayers.Util.isArray(features)) {
            name = "featureMembers";
        } else {
            name = "featureMember";
        }
        var root = this.writeNode("gml:" + name, features);
        this.setAttributeNS(
            root, this.namespaces["xsi"],
            "xsi:schemaLocation", this.schemaLocation
        );

        return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
    },
    
    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "gml": {
            "featureMember": function(feature) {
                var node = this.createElementNSPlus("gml:featureMember");
                this.writeNode("feature:_typeName", feature, node);
                return node;
            },
            "MultiPoint": function(geometry) {
                var node = this.createElementNSPlus("gml:MultiPoint");
                var components = geometry.components || [geometry];
                for(var i=0, ii=components.length; i<ii; ++i) {
                    this.writeNode("pointMember", components[i], node);
                }
                return node;
            },
            "pointMember": function(geometry) {
                var node = this.createElementNSPlus("gml:pointMember");
                this.writeNode("Point", geometry, node);
                return node;
            },
            "MultiLineString": function(geometry) {
                var node = this.createElementNSPlus("gml:MultiLineString");
                var components = geometry.components || [geometry];
                for(var i=0, ii=components.length; i<ii; ++i) {
                    this.writeNode("lineStringMember", components[i], node);
                }
                return node;
            },
            "lineStringMember": function(geometry) {
                var node = this.createElementNSPlus("gml:lineStringMember");
                this.writeNode("LineString", geometry, node);
                return node;
            },
            "MultiPolygon": function(geometry) {
                var node = this.createElementNSPlus("gml:MultiPolygon");
                var components = geometry.components || [geometry];
                for(var i=0, ii=components.length; i<ii; ++i) {
                    this.writeNode(
                        "polygonMember", components[i], node
                    );
                }
                return node;
            },
            "polygonMember": function(geometry) {
                var node = this.createElementNSPlus("gml:polygonMember");
                this.writeNode("Polygon", geometry, node);
                return node;
            },
            "GeometryCollection": function(geometry) {
                var node = this.createElementNSPlus("gml:GeometryCollection");
                for(var i=0, len=geometry.components.length; i<len; ++i) {
                    this.writeNode("geometryMember", geometry.components[i], node);
                }
                return node;
            },
            "geometryMember": function(geometry) {
                var node = this.createElementNSPlus("gml:geometryMember");
                var child = this.writeNode("feature:_geometry", geometry);
                node.appendChild(child.firstChild);
                return node;
            }
        },
        "feature": {
            "_typeName": function(feature) {
                var node = this.createElementNSPlus("feature:" + this.featureType, {
                    attributes: {fid: feature.fid}
                });
                if(feature.geometry) {
                    this.writeNode("feature:_geometry", feature.geometry, node);
                }
                for(var name in feature.attributes) {
                    var value = feature.attributes[name];
                    if(value != null) {
                        this.writeNode(
                            "feature:_attribute",
                            {name: name, value: value}, node
                        );
                    }
                }
                return node;
            },
            "_geometry": function(geometry) {
                if(this.externalProjection && this.internalProjection) {
                    geometry = geometry.clone().transform(
                        this.internalProjection, this.externalProjection
                    );
                }    
                var node = this.createElementNSPlus(
                    "feature:" + this.geometryName
                );
                var type = this.geometryTypes[geometry.CLASS_NAME];
                var child = this.writeNode("gml:" + type, geometry, node);
                if(this.srsName) {
                    child.setAttribute("srsName", this.srsName);
                }
                return node;
            },
            "_attribute": function(obj) {
                return this.createElementNSPlus("feature:" + obj.name, {
                    value: obj.value
                });
            }
        },
        "wfs": {
            "FeatureCollection": function(features) {
                /**
                 * This is only here because GML2 only describes abstract
                 * feature collections.  Typically, you would not be using
                 * the GML format to write wfs elements.  This just provides
                 * some way to write out lists of features.  GML3 defines the
                 * featureMembers element, so that is used by default instead.
                 */
                var node = this.createElementNSPlus("wfs:FeatureCollection");
                for(var i=0, len=features.length; i<len; ++i) {
                    this.writeNode("gml:featureMember", features[i], node);
                }
                return node;
            }
        }
    },
    
    /**
     * Method: setGeometryTypes
     * Sets the <geometryTypes> mapping.
     */
    setGeometryTypes: function() {
        this.geometryTypes = {
            "OpenLayers.Geometry.Point": "Point",
            "OpenLayers.Geometry.MultiPoint": "MultiPoint",
            "OpenLayers.Geometry.LineString": "LineString",
            "OpenLayers.Geometry.MultiLineString": "MultiLineString",
            "OpenLayers.Geometry.Polygon": "Polygon",
            "OpenLayers.Geometry.MultiPolygon": "MultiPolygon",
            "OpenLayers.Geometry.Collection": "GeometryCollection"
        };
    },

    CLASS_NAME: "OpenLayers.Format.GML.Base" 

});
/* ======================================================================
    OpenLayers/Format/GML/v3.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/GML/Base.js
 */

/**
 * Class: OpenLayers.Format.GML.v3
 * Parses GML version 3.
 *
 * Inherits from:
 *  - <OpenLayers.Format.GML.Base>
 */
OpenLayers.Format.GML.v3 = OpenLayers.Class(OpenLayers.Format.GML.Base, {
    
    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.  The writers
     *     conform with the Simple Features Profile for GML.
     */
    schemaLocation: "http://www.opengis.net/gml http://schemas.opengis.net/gml/3.1.1/profiles/gmlsfProfile/1.0.0/gmlsf.xsd",

    /**
     * Property: curve
     * {Boolean} Write gml:Curve instead of gml:LineString elements.  This also
     *     affects the elements in multi-part geometries.  Default is false.
     *     To write gml:Curve elements instead of gml:LineString, set curve
     *     to true in the options to the contstructor (cannot be changed after
     *     instantiation).
     */
    curve: false,
    
    /**
     * Property: multiCurve
     * {Boolean} Write gml:MultiCurve instead of gml:MultiLineString.  Since
     *     the latter is deprecated in GML 3, the default is true.  To write
     *     gml:MultiLineString instead of gml:MultiCurve, set multiCurve to
     *     false in the options to the constructor (cannot be changed after
     *     instantiation).
     */
    multiCurve: true,
    
    /**
     * Property: surface
     * {Boolean} Write gml:Surface instead of gml:Polygon elements.  This also
     *     affects the elements in multi-part geometries.  Default is false.
     *     To write gml:Surface elements instead of gml:Polygon, set surface
     *     to true in the options to the contstructor (cannot be changed after
     *     instantiation).
     */
    surface: false,

    /**
     * Property: multiSurface
     * {Boolean} Write gml:multiSurface instead of gml:MultiPolygon.  Since
     *     the latter is deprecated in GML 3, the default is true.  To write
     *     gml:MultiPolygon instead of gml:multiSurface, set multiSurface to
     *     false in the options to the constructor (cannot be changed after
     *     instantiation).
     */
    multiSurface: true,

    /**
     * Constructor: OpenLayers.Format.GML.v3
     * Create a parser for GML v3.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     *
     * Valid options properties:
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (required).
     * geometryName - {String} Geometry element name.
     */
    initialize: function(options) {
        OpenLayers.Format.GML.Base.prototype.initialize.apply(this, [options]);
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "gml": OpenLayers.Util.applyDefaults({
            "featureMembers": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Curve": function(node, container) {
                var obj = {points: []};
                this.readChildNodes(node, obj);
                if(!container.components) {
                    container.components = [];
                }
                container.components.push(
                    new OpenLayers.Geometry.LineString(obj.points)
                );
            },
            "segments": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "LineStringSegment": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                if(obj.points) {
                    Array.prototype.push.apply(container.points, obj.points);
                }
            },
            "pos": function(node, obj) {
                var str = this.getChildValue(node).replace(
                    this.regExes.trimSpace, ""
                );
                var coords = str.split(this.regExes.splitSpace);
                var point;
                if(this.xy) {
                    point = new OpenLayers.Geometry.Point(
                        coords[0], coords[1], coords[2]
                    );
                } else {
                    point = new OpenLayers.Geometry.Point(
                        coords[1], coords[0], coords[2]
                    );
                }
                obj.points = [point];
            },
            "posList": function(node, obj) {
                var str = this.getChildValue(node).replace(
                    this.regExes.trimSpace, ""
                );
                var coords = str.split(this.regExes.splitSpace);
                var dim = parseInt(node.getAttribute("dimension")) || 2;
                var j, x, y, z;
                var numPoints = coords.length / dim;
                var points = new Array(numPoints);
                for(var i=0, len=coords.length; i<len; i += dim) {
                    x = coords[i];
                    y = coords[i+1];
                    z = (dim == 2) ? undefined : coords[i+2];
                    if (this.xy) {
                        points[i/dim] = new OpenLayers.Geometry.Point(x, y, z);
                    } else {
                        points[i/dim] = new OpenLayers.Geometry.Point(y, x, z);
                    }
                }
                obj.points = points;
            },
            "Surface": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "patches": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "PolygonPatch": function(node, obj) {
                this.readers.gml.Polygon.apply(this, [node, obj]);
            },
            "exterior": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                container.outer = obj.components[0];
            },
            "interior": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                container.inner.push(obj.components[0]);
            },
            "MultiCurve": function(node, container) {
                var obj = {components: []};
                this.readChildNodes(node, obj);
                if(obj.components.length > 0) {
                    container.components = [
                        new OpenLayers.Geometry.MultiLineString(obj.components)
                    ];
                }
            },
            "curveMember": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "MultiSurface": function(node, container) {
                var obj = {components: []};
                this.readChildNodes(node, obj);
                if(obj.components.length > 0) {
                    container.components = [
                        new OpenLayers.Geometry.MultiPolygon(obj.components)
                    ];
                }
            },
            "surfaceMember": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "surfaceMembers": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "pointMembers": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "lineStringMembers": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "polygonMembers": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "geometryMembers": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Envelope": function(node, container) {
                var obj = {points: new Array(2)};
                this.readChildNodes(node, obj);
                if(!container.components) {
                    container.components = [];
                }
                var min = obj.points[0];
                var max = obj.points[1];
                container.components.push(
                    new OpenLayers.Bounds(min.x, min.y, max.x, max.y)
                );
            },
            "lowerCorner": function(node, container) {
                var obj = {};
                this.readers.gml.pos.apply(this, [node, obj]);
                container.points[0] = obj.points[0];
            },
            "upperCorner": function(node, container) {
                var obj = {};
                this.readers.gml.pos.apply(this, [node, obj]);
                container.points[1] = obj.points[0];
            }
        }, OpenLayers.Format.GML.Base.prototype.readers["gml"]),            
        "feature": OpenLayers.Format.GML.Base.prototype.readers["feature"],
        "wfs": OpenLayers.Format.GML.Base.prototype.readers["wfs"]
    },
    
    /**
     * Method: write
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>) | OpenLayers.Feature.Vector}
     *     An array of features or a single feature.
     *
     * Returns:
     * {String} Given an array of features, a doc with a gml:featureMembers
     *     element will be returned.  Given a single feature, a doc with a
     *     gml:featureMember element will be returned.
     */
    write: function(features) {
        var name;
        if(OpenLayers.Util.isArray(features)) {
            name = "featureMembers";
        } else {
            name = "featureMember";
        }
        var root = this.writeNode("gml:" + name, features);
        this.setAttributeNS(
            root, this.namespaces["xsi"],
            "xsi:schemaLocation", this.schemaLocation
        );

        return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "gml": OpenLayers.Util.applyDefaults({
            "featureMembers": function(features) {
                var node = this.createElementNSPlus("gml:featureMembers");
                for(var i=0, len=features.length; i<len; ++i) {
                    this.writeNode("feature:_typeName", features[i], node);
                }
                return node;
            },
            "Point": function(geometry) {
                var node = this.createElementNSPlus("gml:Point");
                this.writeNode("pos", geometry, node);
                return node;
            },
            "pos": function(point) {
                // only 2d for simple features profile
                var pos = (this.xy) ?
                    (point.x + " " + point.y) : (point.y + " " + point.x);
                return this.createElementNSPlus("gml:pos", {
                    value: pos
                });
            },
            "LineString": function(geometry) {
                var node = this.createElementNSPlus("gml:LineString");
                this.writeNode("posList", geometry.components, node);
                return node;
            },
            "Curve": function(geometry) {
                var node = this.createElementNSPlus("gml:Curve");
                this.writeNode("segments", geometry, node);
                return node;
            },
            "segments": function(geometry) {
                var node = this.createElementNSPlus("gml:segments");
                this.writeNode("LineStringSegment", geometry, node);
                return node;
            },
            "LineStringSegment": function(geometry) {
                var node = this.createElementNSPlus("gml:LineStringSegment");
                this.writeNode("posList", geometry.components, node);
                return node;
            },
            "posList": function(points) {
                // only 2d for simple features profile
                var len = points.length;
                var parts = new Array(len);
                var point;
                for(var i=0; i<len; ++i) {
                    point = points[i];
                    if(this.xy) {
                        parts[i] = point.x + " " + point.y;
                    } else {
                        parts[i] = point.y + " " + point.x;
                    }
                }
                return this.createElementNSPlus("gml:posList", {
                    value: parts.join(" ")
                }); 
            },
            "Surface": function(geometry) {
                var node = this.createElementNSPlus("gml:Surface");
                this.writeNode("patches", geometry, node);
                return node;
            },
            "patches": function(geometry) {
                var node = this.createElementNSPlus("gml:patches");
                this.writeNode("PolygonPatch", geometry, node);
                return node;
            },
            "PolygonPatch": function(geometry) {
                var node = this.createElementNSPlus("gml:PolygonPatch", {
                    attributes: {interpolation: "planar"}
                });
                this.writeNode("exterior", geometry.components[0], node);
                for(var i=1, len=geometry.components.length; i<len; ++i) {
                    this.writeNode(
                        "interior", geometry.components[i], node
                    );
                }
                return node;
            },
            "Polygon": function(geometry) {
                var node = this.createElementNSPlus("gml:Polygon");
                this.writeNode("exterior", geometry.components[0], node);
                for(var i=1, len=geometry.components.length; i<len; ++i) {
                    this.writeNode(
                        "interior", geometry.components[i], node
                    );
                }
                return node;
            },
            "exterior": function(ring) {
                var node = this.createElementNSPlus("gml:exterior");
                this.writeNode("LinearRing", ring, node);
                return node;
            },
            "interior": function(ring) {
                var node = this.createElementNSPlus("gml:interior");
                this.writeNode("LinearRing", ring, node);
                return node;
            },
            "LinearRing": function(ring) {
                var node = this.createElementNSPlus("gml:LinearRing");
                this.writeNode("posList", ring.components, node);
                return node;
            },
            "MultiCurve": function(geometry) {
                var node = this.createElementNSPlus("gml:MultiCurve");
                var components = geometry.components || [geometry];
                for(var i=0, len=components.length; i<len; ++i) {
                    this.writeNode("curveMember", components[i], node);
                }
                return node;
            },
            "curveMember": function(geometry) {
                var node = this.createElementNSPlus("gml:curveMember");
                if(this.curve) {
                    this.writeNode("Curve", geometry, node);
                } else {
                    this.writeNode("LineString", geometry, node);
                }
                return node;
            },
            "MultiSurface": function(geometry) {
                var node = this.createElementNSPlus("gml:MultiSurface");
                var components = geometry.components || [geometry];
                for(var i=0, len=components.length; i<len; ++i) {
                    this.writeNode("surfaceMember", components[i], node);
                }
                return node;
            },
            "surfaceMember": function(polygon) {
                var node = this.createElementNSPlus("gml:surfaceMember");
                if(this.surface) {
                    this.writeNode("Surface", polygon, node);
                } else {
                    this.writeNode("Polygon", polygon, node);
                }
                return node;
            },
            "Envelope": function(bounds) {
                var node = this.createElementNSPlus("gml:Envelope");
                this.writeNode("lowerCorner", bounds, node);
                this.writeNode("upperCorner", bounds, node);
                // srsName attribute is required for gml:Envelope
                if(this.srsName) {
                    node.setAttribute("srsName", this.srsName);
                }
                return node;
            },
            "lowerCorner": function(bounds) {
                // only 2d for simple features profile
                var pos = (this.xy) ?
                    (bounds.left + " " + bounds.bottom) :
                    (bounds.bottom + " " + bounds.left);
                return this.createElementNSPlus("gml:lowerCorner", {
                    value: pos
                });
            },
            "upperCorner": function(bounds) {
                // only 2d for simple features profile
                var pos = (this.xy) ?
                    (bounds.right + " " + bounds.top) :
                    (bounds.top + " " + bounds.right);
                return this.createElementNSPlus("gml:upperCorner", {
                    value: pos
                });
            }
        }, OpenLayers.Format.GML.Base.prototype.writers["gml"]),
        "feature": OpenLayers.Format.GML.Base.prototype.writers["feature"],
        "wfs": OpenLayers.Format.GML.Base.prototype.writers["wfs"]
    },

    /**
     * Method: setGeometryTypes
     * Sets the <geometryTypes> mapping.
     */
    setGeometryTypes: function() {
        this.geometryTypes = {
            "OpenLayers.Geometry.Point": "Point",
            "OpenLayers.Geometry.MultiPoint": "MultiPoint",
            "OpenLayers.Geometry.LineString": (this.curve === true) ? "Curve": "LineString",
            "OpenLayers.Geometry.MultiLineString": (this.multiCurve === false) ? "MultiLineString" : "MultiCurve",
            "OpenLayers.Geometry.Polygon": (this.surface === true) ? "Surface" : "Polygon",
            "OpenLayers.Geometry.MultiPolygon": (this.multiSurface === false) ? "MultiPolygon" : "MultiSurface",
            "OpenLayers.Geometry.Collection": "GeometryCollection"
        };
    },
    
    CLASS_NAME: "OpenLayers.Format.GML.v3" 

});
/* ======================================================================
    OpenLayers/Format/Filter/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/Filter/v1.js
 * @requires OpenLayers/Format/GML/v3.js
 */

/**
 * Class: OpenLayers.Format.Filter.v1_1_0
 * Write ogc:Filter version 1.1.0.
 *
 * Differences from the v1.0.0 parser:
 *  - uses GML v3 instead of GML v2
 *  - reads matchCase attribute on ogc:PropertyIsEqual and
 *        ogc:PropertyIsNotEqual elements.
 *  - writes matchCase attribute from comparison filters of type EQUAL_TO,
 *        NOT_EQUAL_TO and LIKE.
 * 
 * Inherits from: 
 *  - <OpenLayers.Format.GML.v3>
 *  - <OpenLayers.Format.Filter.v1>
 */
OpenLayers.Format.Filter.v1_1_0 = OpenLayers.Class(
    OpenLayers.Format.GML.v3, OpenLayers.Format.Filter.v1, {
    
    /**
     * Constant: VERSION
     * {String} 1.1.0
     */
    VERSION: "1.1.0",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/ogc/filter/1.1.0/filter.xsd
     */
    schemaLocation: "http://www.opengis.net/ogc/filter/1.1.0/filter.xsd",

    /**
     * Constructor: OpenLayers.Format.Filter.v1_1_0
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.Filter> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.GML.v3.prototype.initialize.apply(
            this, [options]
        );
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ogc": OpenLayers.Util.applyDefaults({
            "PropertyIsEqualTo": function(node, obj) {
                var matchCase = node.getAttribute("matchCase");
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.EQUAL_TO,
                    matchCase: !(matchCase === "false" || matchCase === "0")
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsNotEqualTo": function(node, obj) {
                var matchCase = node.getAttribute("matchCase");
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.NOT_EQUAL_TO,
                    matchCase: !(matchCase === "false" || matchCase === "0")
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsLike": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.LIKE
                });
                this.readChildNodes(node, filter);
                var wildCard = node.getAttribute("wildCard");
                var singleChar = node.getAttribute("singleChar");
                var esc = node.getAttribute("escapeChar");
                filter.value2regex(wildCard, singleChar, esc);
                obj.filters.push(filter);
            }
        }, OpenLayers.Format.Filter.v1.prototype.readers["ogc"]),
        "gml": OpenLayers.Format.GML.v3.prototype.readers["gml"],
        "feature": OpenLayers.Format.GML.v3.prototype.readers["feature"]        
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "ogc": OpenLayers.Util.applyDefaults({
            "PropertyIsEqualTo": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsEqualTo", {
                    attributes: {matchCase: filter.matchCase}
                });
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsNotEqualTo": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsNotEqualTo", {
                    attributes: {matchCase: filter.matchCase}
                });
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsLike": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsLike", {
                    attributes: {
                        matchCase: filter.matchCase,
                        wildCard: "*", singleChar: ".", escapeChar: "!"
                    }
                });
                // no ogc:expression handling for now
                this.writeNode("PropertyName", filter, node);
                // convert regex string to ogc string
                this.writeNode("Literal", filter.regex2value(), node);
                return node;
            },
            "BBOX": function(filter) {
                var node = this.createElementNSPlus("ogc:BBOX");
                // PropertyName is optional in 1.1.0
                filter.property && this.writeNode("PropertyName", filter, node);
                var box = this.writeNode("gml:Envelope", filter.value);
                if(filter.projection) {
                    box.setAttribute("srsName", filter.projection);
                }
                node.appendChild(box); 
                return node;
            },
            "SortBy": function(sortProperties) {
                var node = this.createElementNSPlus("ogc:SortBy");
                for (var i=0,l=sortProperties.length;i<l;i++) {
                    this.writeNode(
                        "ogc:SortProperty",
                        sortProperties[i],
                        node
                    );
                }
                return node;
            }, 
            "SortProperty": function(sortProperty) {
                var node = this.createElementNSPlus("ogc:SortProperty");
                this.writeNode(
                    "ogc:PropertyName",
                    sortProperty,
                    node
                );
                this.writeNode(
                    "ogc:SortOrder",
                    (sortProperty.order == 'DESC') ? 'DESC' : 'ASC',
                    node
                );
                return node;
            },
            "SortOrder": function(value) {
                var node = this.createElementNSPlus("ogc:SortOrder", {
                    value: value
                });
                return node;
            }
        }, OpenLayers.Format.Filter.v1.prototype.writers["ogc"]),
        "gml": OpenLayers.Format.GML.v3.prototype.writers["gml"],
        "feature": OpenLayers.Format.GML.v3.prototype.writers["feature"]
    },

    /**
     * Method: writeSpatial
     *
     * Read a {<OpenLayers.Filter.Spatial>} filter and converts it into XML.
     *
     * Parameters:
     * filter - {<OpenLayers.Filter.Spatial>} The filter.
     * name - {String} Name of the generated XML element.
     *
     * Returns:
     * {DOMElement} The created XML element.
     */
    writeSpatial: function(filter, name) {
        var node = this.createElementNSPlus("ogc:"+name);
        this.writeNode("PropertyName", filter, node);
        if(filter.value instanceof OpenLayers.Filter.Function) {
            this.writeNode("Function", filter.value, node);
        } else {
        var child;
        if(filter.value instanceof OpenLayers.Geometry) {
            child = this.writeNode("feature:_geometry", filter.value).firstChild;
        } else {
            child = this.writeNode("gml:Envelope", filter.value);
        }
        if(filter.projection) {
            child.setAttribute("srsName", filter.projection);
        }
        node.appendChild(child);
        }
        return node;
    },

    CLASS_NAME: "OpenLayers.Format.Filter.v1_1_0" 

});
/* ======================================================================
    OpenLayers/Format/OWSCommon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */

/**
 * Class: OpenLayers.Format.OWSCommon
 * Read OWSCommon. Create a new instance with the <OpenLayers.Format.OWSCommon>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.OWSCommon = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.0.0".
     */
    defaultVersion: "1.0.0",
    
    /**
     * Constructor: OpenLayers.Format.OWSCommon
     * Create a new parser for OWSCommon.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Method: getVersion
     * Returns the version to use. Subclasses can override this function
     * if a different version detection is needed.
     *
     * Parameters:
     * root - {DOMElement}
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} The version to use.
     */
    getVersion: function(root, options) {
        var version = this.version;
        if(!version) {
            // remember version does not correspond to the OWS version
            // it corresponds to the WMS/WFS/WCS etc. request version
            var uri = root.getAttribute("xmlns:ows");
            // the above will fail if the namespace prefix is different than
            // ows and if the namespace is declared on a different element
            if (uri && uri.substring(uri.lastIndexOf("/")+1) === "1.1") {
                version ="1.1.0";
            } 
            if(!version) {
                version = this.defaultVersion;
            }
        }
        return version;
    },

    /**
     * APIMethod: read
     * Read an OWSCommon document and return an object.
     *
     * Parameters:
     * data - {String | DOMElement} Data to read.
     * options - {Object} Options for the reader.
     *
     * Returns:
     * {Object} An object representing the structure of the document.
     */

    CLASS_NAME: "OpenLayers.Format.OWSCommon" 
});
/* ======================================================================
    OpenLayers/Format/OWSCommon/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/OWSCommon.js
 */

/**
 * Class: OpenLayers.Format.OWSCommon.v1
 * Common readers and writers for OWSCommon v1.X formats
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.OWSCommon.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
   
    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Method: read
     *
     * Parameters:
     * data - {DOMElement} An OWSCommon document element.
     * options - {Object} Options for the reader.
     *
     * Returns:
     * {Object} An object representing the OWSCommon document.
     */
    read: function(data, options) {
        options = OpenLayers.Util.applyDefaults(options, this.options);
        var ows = {};
        this.readChildNodes(data, ows);
        return ows;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ows": {
            "Exception": function(node, exceptionReport) {
                var exception = {
                    code: node.getAttribute('exceptionCode'),
                    locator: node.getAttribute('locator'),
                    texts: []
                };
                exceptionReport.exceptions.push(exception);
                this.readChildNodes(node, exception);
            },
            "ExceptionText": function(node, exception) {
                var text = this.getChildValue(node);
                exception.texts.push(text);
            },
            "ServiceIdentification": function(node, obj) {
                obj.serviceIdentification = {};
                this.readChildNodes(node, obj.serviceIdentification);
            },
            "Title": function(node, obj) {
                obj.title = this.getChildValue(node);
            },
            "Abstract": function(node, serviceIdentification) {
                serviceIdentification["abstract"] = this.getChildValue(node);
            },
            "Keywords": function(node, serviceIdentification) {
                serviceIdentification.keywords = {};
                this.readChildNodes(node, serviceIdentification.keywords);
            },
            "Keyword": function(node, keywords) {
                keywords[this.getChildValue(node)] = true;
            },
            "ServiceType": function(node, serviceIdentification) {
                serviceIdentification.serviceType = {
                    codeSpace: node.getAttribute('codeSpace'), 
                    value: this.getChildValue(node)};
            },
            "ServiceTypeVersion": function(node, serviceIdentification) {
                serviceIdentification.serviceTypeVersion = this.getChildValue(node);
            },
            "Fees": function(node, serviceIdentification) {
                serviceIdentification.fees = this.getChildValue(node);
            },
            "AccessConstraints": function(node, serviceIdentification) {
                serviceIdentification.accessConstraints = 
                    this.getChildValue(node);
            },
            "ServiceProvider": function(node, obj) {
                obj.serviceProvider = {};
                this.readChildNodes(node, obj.serviceProvider);
            },
            "ProviderName": function(node, serviceProvider) {
                serviceProvider.providerName = this.getChildValue(node);
            },
            "ProviderSite": function(node, serviceProvider) {
                serviceProvider.providerSite = this.getAttributeNS(node, 
                    this.namespaces.xlink, "href");
            },
            "ServiceContact": function(node, serviceProvider) {
                serviceProvider.serviceContact = {};
                this.readChildNodes(node, serviceProvider.serviceContact);
            },
            "IndividualName": function(node, serviceContact) {
                serviceContact.individualName = this.getChildValue(node);
            },
            "PositionName": function(node, serviceContact) {
                serviceContact.positionName = this.getChildValue(node);
            },
            "ContactInfo": function(node, serviceContact) {
                serviceContact.contactInfo = {};
                this.readChildNodes(node, serviceContact.contactInfo);
            },
            "Phone": function(node, contactInfo) {
                contactInfo.phone = {};
                this.readChildNodes(node, contactInfo.phone);
            },
            "Voice": function(node, phone) {
                phone.voice = this.getChildValue(node);
            },
            "Address": function(node, contactInfo) {
                contactInfo.address = {};
                this.readChildNodes(node, contactInfo.address);
            },
            "DeliveryPoint": function(node, address) {
                address.deliveryPoint = this.getChildValue(node);
            },
            "City": function(node, address) {
                address.city = this.getChildValue(node);
            },
            "AdministrativeArea": function(node, address) {
                address.administrativeArea = this.getChildValue(node);
            },
            "PostalCode": function(node, address) {
                address.postalCode = this.getChildValue(node);
            },
            "Country": function(node, address) {
                address.country = this.getChildValue(node);
            },
            "ElectronicMailAddress": function(node, address) {
                address.electronicMailAddress = this.getChildValue(node);
            },
            "Role": function(node, serviceContact) {
                serviceContact.role = this.getChildValue(node);
            },
            "OperationsMetadata": function(node, obj) {
                obj.operationsMetadata = {};
                this.readChildNodes(node, obj.operationsMetadata);
            },
            "Operation": function(node, operationsMetadata) {
                var name = node.getAttribute("name");
                operationsMetadata[name] = {};
                this.readChildNodes(node, operationsMetadata[name]);
            },
            "DCP": function(node, operation) {
                operation.dcp = {};
                this.readChildNodes(node, operation.dcp);
            },
            "HTTP": function(node, dcp) {
                dcp.http = {};
                this.readChildNodes(node, dcp.http);
            },
            "Get": function(node, http) {
                if (!http.get) {
                    http.get = [];
                }
                var obj = {
                    url: this.getAttributeNS(node, this.namespaces.xlink, "href")
                };
                this.readChildNodes(node, obj);
                http.get.push(obj);
            },
            "Post": function(node, http) {
                if (!http.post) {
                    http.post = [];
                }
                var obj = {
                    url: this.getAttributeNS(node, this.namespaces.xlink, "href")
                };
                this.readChildNodes(node, obj);
                http.post.push(obj);
            },
            "Parameter": function(node, operation) {
                if (!operation.parameters) {
                    operation.parameters = {};
                }
                var name = node.getAttribute("name");
                operation.parameters[name] = {};
                this.readChildNodes(node, operation.parameters[name]);
            },
            "Constraint": function(node, obj) {
                if (!obj.constraints) {
                    obj.constraints = {};
                }
                var name = node.getAttribute("name");
                obj.constraints[name] = {};
                this.readChildNodes(node, obj.constraints[name]);
            },
            "Value": function(node, allowedValues) {
                allowedValues[this.getChildValue(node)] = true;
            },
            "OutputFormat": function(node, obj) {
                obj.formats.push({value: this.getChildValue(node)});
                this.readChildNodes(node, obj);
            },
            "WGS84BoundingBox": function(node, obj) {
                var boundingBox = {};
                boundingBox.crs = node.getAttribute("crs");
                if (obj.BoundingBox) {
                    obj.BoundingBox.push(boundingBox);
                } else {
                    obj.projection = boundingBox.crs;
                    boundingBox = obj;
               }
               this.readChildNodes(node, boundingBox);
            },
            "BoundingBox": function(node, obj) {
                // FIXME: We consider that BoundingBox is the same as WGS84BoundingBox
                // LowerCorner = "min_x min_y"
                // UpperCorner = "max_x max_y"
                // It should normally depend on the projection
                this.readers['ows']['WGS84BoundingBox'].apply(this, [node, obj]);
            },
            "LowerCorner": function(node, obj) {
                var str = this.getChildValue(node).replace(
                    this.regExes.trimSpace, "");
                str = str.replace(this.regExes.trimComma, ",");
                var pointList = str.split(this.regExes.splitSpace);
                obj.left = pointList[0];
                obj.bottom = pointList[1];
            },
            "UpperCorner": function(node, obj) {
                var str = this.getChildValue(node).replace(
                    this.regExes.trimSpace, "");
                str = str.replace(this.regExes.trimComma, ",");
                var pointList = str.split(this.regExes.splitSpace);
                obj.right = pointList[0];
                obj.top = pointList[1];
                obj.bounds = new OpenLayers.Bounds(obj.left, obj.bottom,
                    obj.right, obj.top);
                delete obj.left;
                delete obj.bottom;
                delete obj.right;
                delete obj.top;
            },
            "Language": function(node, obj) {
                obj.language = this.getChildValue(node);
            }
        }
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "ows": {
            "BoundingBox": function(options) {
                var node = this.createElementNSPlus("ows:BoundingBox", {
                    attributes: {
                        crs: options.projection
                    }
                });
                this.writeNode("ows:LowerCorner", options, node);
                this.writeNode("ows:UpperCorner", options, node);
                return node;
            },
            "LowerCorner": function(options) {
                var node = this.createElementNSPlus("ows:LowerCorner", {
                    value: options.bounds.left + " " + options.bounds.bottom });
                return node;
            },
            "UpperCorner": function(options) {
                var node = this.createElementNSPlus("ows:UpperCorner", {
                    value: options.bounds.right + " " + options.bounds.top });
                return node;
            },
            "Identifier": function(identifier) {
                var node = this.createElementNSPlus("ows:Identifier", {
                    value: identifier });
                return node;
            },
            "Title": function(title) {
                var node = this.createElementNSPlus("ows:Title", {
                    value: title });
                return node;
            },
            "Abstract": function(abstractValue) {
                var node = this.createElementNSPlus("ows:Abstract", {
                    value: abstractValue });
                return node;
            },
            "OutputFormat": function(format) {
                var node = this.createElementNSPlus("ows:OutputFormat", {
                    value: format });
                return node;
            }
        }
    },

    CLASS_NAME: "OpenLayers.Format.OWSCommon.v1"

});
/* ======================================================================
    OpenLayers/Format/OWSCommon/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/OWSCommon/v1.js
 */

/**
 * Class: OpenLayers.Format.OWSCommon.v1_0_0
 * Parser for OWS Common version 1.0.0.
 *
 * Inherits from:
 *  - <OpenLayers.Format.OWSCommon.v1>
 */
OpenLayers.Format.OWSCommon.v1_0_0 = OpenLayers.Class(OpenLayers.Format.OWSCommon.v1, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows",
        xlink: "http://www.w3.org/1999/xlink"
    },    
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ows": OpenLayers.Util.applyDefaults({
            "ExceptionReport": function(node, obj) {
                obj.success = false;
                obj.exceptionReport = {
                    version: node.getAttribute('version'),
                    language: node.getAttribute('language'),
                    exceptions: []
                };
                this.readChildNodes(node, obj.exceptionReport);
            } 
        }, OpenLayers.Format.OWSCommon.v1.prototype.readers.ows)
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "ows": OpenLayers.Format.OWSCommon.v1.prototype.writers.ows
    },
    
    CLASS_NAME: "OpenLayers.Format.OWSCommon.v1_0_0"

});
/* ======================================================================
    OpenLayers/Format/WFST/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WFST/v1.js
 * @requires OpenLayers/Format/Filter/v1_1_0.js
 * @requires OpenLayers/Format/OWSCommon/v1_0_0.js
 */

/**
 * Class: OpenLayers.Format.WFST.v1_1_0
 * A format for creating WFS v1.1.0 transactions.  Create a new instance with the
 *     <OpenLayers.Format.WFST.v1_1_0> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.Filter.v1_1_0>
 *  - <OpenLayers.Format.WFST.v1>
 */
OpenLayers.Format.WFST.v1_1_0 = OpenLayers.Class(
    OpenLayers.Format.Filter.v1_1_0, OpenLayers.Format.WFST.v1, {
    
    /**
     * Property: version
     * {String} WFS version number.
     */
    version: "1.1.0",
    
    /**
     * Property: schemaLocations
     * {Object} Properties are namespace aliases, values are schema locations.
     */
    schemaLocations: {
        "wfs": "http://schemas.opengis.net/wfs/1.1.0/wfs.xsd"
    },
    
    /**
     * Constructor: OpenLayers.Format.WFST.v1_1_0
     * A class for parsing and generating WFS v1.1.0 transactions.
     *
     * To read additional information like hit count (numberOfFeatures) from
     * the  FeatureCollection, call the <OpenLayers.Format.WFST.v1.read> method
     * with {output: "object"} as 2nd argument. Note that it is possible to
     * just request the hit count from a WFS 1.1.0 server with the
     * resultType="hits" request parameter.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (optional).
     * featurePrefix - {String} Feature namespace alias (optional - only used
     *     if featureNS is provided).  Default is 'feature'.
     * geometryName - {String} Name of geometry attribute.  Default is 'the_geom'.
     */
    initialize: function(options) {
        OpenLayers.Format.Filter.v1_1_0.prototype.initialize.apply(this, [options]);
        OpenLayers.Format.WFST.v1.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * Method: readNode
     * Shorthand for applying one of the named readers given the node
     *     namespace and local name.  Readers take two args (node, obj) and
     *     generally extend or modify the second.
     *
     * Parameters:
     * node - {DOMElement} The node to be read (required).
     * obj - {Object} The object to be modified (optional).
     * first - {Boolean} Should be set to true for the first node read. This
     *     is usually the readNode call in the read method. Without this being
     *     set, auto-configured properties will stick on subsequent reads.
     *
     * Returns:
     * {Object} The input object, modified (or a new one if none was provided).
     */
    readNode: function(node, obj, first) {
        // Not the superclass, only the mixin classes inherit from
        // Format.GML.v3. We need this because we don't want to get readNode
        // from the superclass's superclass, which is OpenLayers.Format.XML.
        return OpenLayers.Format.GML.v3.prototype.readNode.apply(this, [node, obj]);
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wfs": OpenLayers.Util.applyDefaults({
            "FeatureCollection": function(node, obj) {
                obj.numberOfFeatures = parseInt(node.getAttribute(
                    "numberOfFeatures"));
                OpenLayers.Format.WFST.v1.prototype.readers["wfs"]["FeatureCollection"].apply(
                    this, arguments);
            },
            "TransactionResponse": function(node, obj) {
                obj.insertIds = [];
                obj.success = false;
                this.readChildNodes(node, obj);
            },
            "TransactionSummary": function(node, obj) {
                // this is a limited test of success
                obj.success = true;
            },
            "InsertResults": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Feature": function(node, container) {
                var obj = {fids: []};
                this.readChildNodes(node, obj);
                container.insertIds.push(obj.fids[0]);
            }
        }, OpenLayers.Format.WFST.v1.prototype.readers["wfs"]),
        "gml": OpenLayers.Format.GML.v3.prototype.readers["gml"],
        "feature": OpenLayers.Format.GML.v3.prototype.readers["feature"],
        "ogc": OpenLayers.Format.Filter.v1_1_0.prototype.readers["ogc"],
        "ows": OpenLayers.Format.OWSCommon.v1_0_0.prototype.readers["ows"]
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "wfs": OpenLayers.Util.applyDefaults({
            "GetFeature": function(options) {
                var node = OpenLayers.Format.WFST.v1.prototype.writers["wfs"]["GetFeature"].apply(this, arguments);
                options && this.setAttributes(node, {
                    resultType: options.resultType,
                    startIndex: options.startIndex,
                    count: options.count
                });
                return node;
            },
            "Query": function(options) {
                options = OpenLayers.Util.extend({
                    featureNS: this.featureNS,
                    featurePrefix: this.featurePrefix,
                    featureType: this.featureType,
                    srsName: this.srsName
                }, options);
                var prefix = options.featurePrefix;
                var node = this.createElementNSPlus("wfs:Query", {
                    attributes: {
                        typeName: (prefix ? prefix + ":" : "") +
                            options.featureType,
                        srsName: options.srsName
                    }
                });
                if(options.featureNS) {
                    node.setAttribute("xmlns:" + prefix, options.featureNS);
                }
                if(options.propertyNames) {
                    for(var i=0,len = options.propertyNames.length; i<len; i++) {
                        this.writeNode(
                            "wfs:PropertyName", 
                            {property: options.propertyNames[i]},
                            node
                        );
                    }
                }
                if(options.filter) {
                    OpenLayers.Format.WFST.v1_1_0.prototype.setFilterProperty.call(this, options.filter);
                    this.writeNode("ogc:Filter", options.filter, node);
                }
                return node;
            },
            "PropertyName": function(obj) {
                return this.createElementNSPlus("wfs:PropertyName", {
                    value: obj.property
                });
            }            
        }, OpenLayers.Format.WFST.v1.prototype.writers["wfs"]),
        "gml": OpenLayers.Format.GML.v3.prototype.writers["gml"],
        "feature": OpenLayers.Format.GML.v3.prototype.writers["feature"],
        "ogc": OpenLayers.Format.Filter.v1_1_0.prototype.writers["ogc"]
    },

    CLASS_NAME: "OpenLayers.Format.WFST.v1_1_0" 
});
/* ======================================================================
    OpenLayers/Protocol.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Protocol
 * Abstract vector layer protocol class.  Not to be instantiated directly.  Use
 *     one of the protocol subclasses instead.
 */
OpenLayers.Protocol = OpenLayers.Class({
    
    /**
     * Property: format
     * {<OpenLayers.Format>} The format used by this protocol.
     */
    format: null,
    
    /**
     * Property: options
     * {Object} Any options sent to the constructor.
     */
    options: null,

    /**
     * Property: autoDestroy
     * {Boolean} The creator of the protocol can set autoDestroy to false
     *      to fully control when the protocol is destroyed. Defaults to
     *      true.
     */
    autoDestroy: true,
   
    /**
     * Property: defaultFilter
     * {<OpenLayers.Filter>} Optional default filter to read requests
     */
    defaultFilter: null,
    
    /**
     * Constructor: OpenLayers.Protocol
     * Abstract class for vector protocols.  Create instances of a subclass.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    initialize: function(options) {
        options = options || {};
        OpenLayers.Util.extend(this, options);
        this.options = options;
    },

    /**
     * Method: mergeWithDefaultFilter
     * Merge filter passed to the read method with the default one
     *
     * Parameters:
     * filter - {<OpenLayers.Filter>}
     */
    mergeWithDefaultFilter: function(filter) {
        var merged;
        if (filter && this.defaultFilter) {
            merged = new OpenLayers.Filter.Logical({
                type: OpenLayers.Filter.Logical.AND,
                filters: [this.defaultFilter, filter]
            });
        } else {
            merged = filter || this.defaultFilter || undefined;
        }
        return merged;
    },

    /**
     * APIMethod: destroy
     * Clean up the protocol.
     */
    destroy: function() {
        this.options = null;
        this.format = null;
    },
    
    /**
     * APIMethod: read
     * Construct a request for reading new features.
     *
     * Parameters:
     * options - {Object} Optional object for configuring the request.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     * object, the same object will be passed to the callback function passed
     * if one exists in the options object.
     */
    read: function(options) {
        options = options || {};
        options.filter = this.mergeWithDefaultFilter(options.filter);
    },
    
    
    /**
     * APIMethod: create
     * Construct a request for writing newly created features.
     *
     * Parameters:
     * features - {Array({<OpenLayers.Feature.Vector>})} or
     *            {<OpenLayers.Feature.Vector>}
     * options - {Object} Optional object for configuring the request.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     * object, the same object will be passed to the callback function passed
     * if one exists in the options object.
     */
    create: function() {
    },
    
    /**
     * APIMethod: update
     * Construct a request updating modified features.
     *
     * Parameters:
     * features - {Array({<OpenLayers.Feature.Vector>})} or
     *            {<OpenLayers.Feature.Vector>}
     * options - {Object} Optional object for configuring the request.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     * object, the same object will be passed to the callback function passed
     * if one exists in the options object.
     */
    update: function() {
    },
    
    /**
     * APIMethod: delete
     * Construct a request deleting a removed feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * options - {Object} Optional object for configuring the request.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     * object, the same object will be passed to the callback function passed
     * if one exists in the options object.
     */
    "delete": function() {
    },

    /**
     * APIMethod: commit
     * Go over the features and for each take action
     * based on the feature state. Possible actions are create,
     * update and delete.
     *
     * Parameters:
     * features - {Array({<OpenLayers.Feature.Vector>})}
     * options - {Object} Object whose possible keys are "create", "update",
     *      "delete", "callback" and "scope", the values referenced by the
     *      first three are objects as passed to the "create", "update", and
     *      "delete" methods, the value referenced by the "callback" key is
     *      a function which is called when the commit operation is complete
     *      using the scope referenced by the "scope" key.
     *
     * Returns:
     * {Array({<OpenLayers.Protocol.Response>})} An array of
     * <OpenLayers.Protocol.Response> objects.
     */
    commit: function() {
    },

    /**
     * Method: abort
     * Abort an ongoing request.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>}
     */
    abort: function(response) {
    },
   
    /**
     * Method: createCallback
     * Returns a function that applies the given public method with resp and
     *     options arguments.
     *
     * Parameters:
     * method - {Function} The method to be applied by the callback.
     * response - {<OpenLayers.Protocol.Response>} The protocol response object.
     * options - {Object} Options sent to the protocol method
     */
    createCallback: function(method, response, options) {
        return OpenLayers.Function.bind(function() {
            method.apply(this, [response, options]);
        }, this);
    },
   
    CLASS_NAME: "OpenLayers.Protocol" 
});

/**
 * Class: OpenLayers.Protocol.Response
 * Protocols return Response objects to their users.
 */
OpenLayers.Protocol.Response = OpenLayers.Class({
    /**
     * Property: code
     * {Number} - OpenLayers.Protocol.Response.SUCCESS or
     *            OpenLayers.Protocol.Response.FAILURE
     */
    code: null,

    /**
     * Property: requestType
     * {String} The type of request this response corresponds to. Either
     *      "create", "read", "update" or "delete".
     */
    requestType: null,

    /**
     * Property: last
     * {Boolean} - true if this is the last response expected in a commit,
     * false otherwise, defaults to true.
     */
    last: true,

    /**
     * Property: features
     * {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>}
     * The features returned in the response by the server. Depending on the 
     * protocol's read payload, either features or data will be populated.
     */
    features: null,

    /**
     * Property: data
     * {Object}
     * The data returned in the response by the server. Depending on the 
     * protocol's read payload, either features or data will be populated.
     */
    data: null,

    /**
     * Property: reqFeatures
     * {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>}
     * The features provided by the user and placed in the request by the
     *      protocol.
     */
    reqFeatures: null,

    /**
     * Property: priv
     */
    priv: null,

    /**
     * Property: error
     * {Object} The error object in case a service exception was encountered.
     */
    error: null,

    /**
     * Constructor: OpenLayers.Protocol.Response
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    initialize: function(options) {
        OpenLayers.Util.extend(this, options);
    },

    /**
     * Method: success
     *
     * Returns:
     * {Boolean} - true on success, false otherwise
     */
    success: function() {
        return this.code > 0;
    },

    CLASS_NAME: "OpenLayers.Protocol.Response"
});

OpenLayers.Protocol.Response.SUCCESS = 1;
OpenLayers.Protocol.Response.FAILURE = 0;
/* ======================================================================
    OpenLayers/Format/JSON.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * Note:
 * This work draws heavily from the public domain JSON serializer/deserializer
 *     at http://www.json.org/json.js. Rewritten so that it doesn't modify
 *     basic data prototypes.
 */

/**
 * @requires OpenLayers/Format.js
 */

/**
 * Class: OpenLayers.Format.JSON
 * A parser to read/write JSON safely.  Create a new instance with the
 *     <OpenLayers.Format.JSON> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format>
 */
OpenLayers.Format.JSON = OpenLayers.Class(OpenLayers.Format, {
    
    /**
     * APIProperty: indent
     * {String} For "pretty" printing, the indent string will be used once for
     *     each indentation level.
     */
    indent: "    ",
    
    /**
     * APIProperty: space
     * {String} For "pretty" printing, the space string will be used after
     *     the ":" separating a name/value pair.
     */
    space: " ",
    
    /**
     * APIProperty: newline
     * {String} For "pretty" printing, the newline string will be used at the
     *     end of each name/value pair or array item.
     */
    newline: "\n",
    
    /**
     * Property: level
     * {Integer} For "pretty" printing, this is incremented/decremented during
     *     serialization.
     */
    level: 0,

    /**
     * Property: pretty
     * {Boolean} Serialize with extra whitespace for structure.  This is set
     *     by the <write> method.
     */
    pretty: false,

    /**
     * Property: nativeJSON
     * {Boolean} Does the browser support native json?
     */
    nativeJSON: (function() {
        return !!(window.JSON && typeof JSON.parse == "function" && typeof JSON.stringify == "function");
    })(),

    /**
     * Constructor: OpenLayers.Format.JSON
     * Create a new parser for JSON.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Deserialize a json string.
     *
     * Parameters:
     * json - {String} A JSON string
     * filter - {Function} A function which will be called for every key and
     *     value at every level of the final result. Each value will be
     *     replaced by the result of the filter function. This can be used to
     *     reform generic objects into instances of classes, or to transform
     *     date strings into Date objects.
     *     
     * Returns:
     * {Object} An object, array, string, or number .
     */
    read: function(json, filter) {
        var object;
        if (this.nativeJSON) {
            object = JSON.parse(json, filter);
        } else try {
            /**
             * Parsing happens in three stages. In the first stage, we run the
             *     text against a regular expression which looks for non-JSON
             *     characters. We are especially concerned with '()' and 'new'
             *     because they can cause invocation, and '=' because it can
             *     cause mutation. But just to be safe, we will reject all
             *     unexpected characters.
             */
            if (/^[\],:{}\s]*$/.test(json.replace(/\\["\\\/bfnrtu]/g, '@').
                                replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
                                replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

                /**
                 * In the second stage we use the eval function to compile the
                 *     text into a JavaScript structure. The '{' operator is
                 *     subject to a syntactic ambiguity in JavaScript - it can
                 *     begin a block or an object literal. We wrap the text in
                 *     parens to eliminate the ambiguity.
                 */
                object = eval('(' + json + ')');

                /**
                 * In the optional third stage, we recursively walk the new
                 *     structure, passing each name/value pair to a filter
                 *     function for possible transformation.
                 */
                if(typeof filter === 'function') {
                    function walk(k, v) {
                        if(v && typeof v === 'object') {
                            for(var i in v) {
                                if(v.hasOwnProperty(i)) {
                                    v[i] = walk(i, v[i]);
                                }
                            }
                        }
                        return filter(k, v);
                    }
                    object = walk('', object);
                }
            }
        } catch(e) {
            // Fall through if the regexp test fails.
        }

        if(this.keepData) {
            this.data = object;
        }

        return object;
    },

    /**
     * APIMethod: write
     * Serialize an object into a JSON string.
     *
     * Parameters:
     * value - {String} The object, array, string, number, boolean or date
     *     to be serialized.
     * pretty - {Boolean} Structure the output with newlines and indentation.
     *     Default is false.
     *
     * Returns:
     * {String} The JSON string representation of the input value.
     */
    write: function(value, pretty) {
        this.pretty = !!pretty;
        var json = null;
        var type = typeof value;
        if(this.serialize[type]) {
            try {
                json = (!this.pretty && this.nativeJSON) ?
                    JSON.stringify(value) :
                    this.serialize[type].apply(this, [value]);
            } catch(err) {
                OpenLayers.Console.error("Trouble serializing: " + err);
            }
        }
        return json;
    },
    
    /**
     * Method: writeIndent
     * Output an indentation string depending on the indentation level.
     *
     * Returns:
     * {String} An appropriate indentation string.
     */
    writeIndent: function() {
        var pieces = [];
        if(this.pretty) {
            for(var i=0; i<this.level; ++i) {
                pieces.push(this.indent);
            }
        }
        return pieces.join('');
    },
    
    /**
     * Method: writeNewline
     * Output a string representing a newline if in pretty printing mode.
     *
     * Returns:
     * {String} A string representing a new line.
     */
    writeNewline: function() {
        return (this.pretty) ? this.newline : '';
    },
    
    /**
     * Method: writeSpace
     * Output a string representing a space if in pretty printing mode.
     *
     * Returns:
     * {String} A space.
     */
    writeSpace: function() {
        return (this.pretty) ? this.space : '';
    },

    /**
     * Property: serialize
     * Object with properties corresponding to the serializable data types.
     *     Property values are functions that do the actual serializing.
     */
    serialize: {
        /**
         * Method: serialize.object
         * Transform an object into a JSON string.
         *
         * Parameters:
         * object - {Object} The object to be serialized.
         * 
         * Returns:
         * {String} A JSON string representing the object.
         */
        'object': function(object) {
            // three special objects that we want to treat differently
            if(object == null) {
                return "null";
            }
            if(object.constructor == Date) {
                return this.serialize.date.apply(this, [object]);
            }
            if(object.constructor == Array) {
                return this.serialize.array.apply(this, [object]);
            }
            var pieces = ['{'];
            this.level += 1;
            var key, keyJSON, valueJSON;
            
            var addComma = false;
            for(key in object) {
                if(object.hasOwnProperty(key)) {
                    // recursive calls need to allow for sub-classing
                    keyJSON = OpenLayers.Format.JSON.prototype.write.apply(this,
                                                    [key, this.pretty]);
                    valueJSON = OpenLayers.Format.JSON.prototype.write.apply(this,
                                                    [object[key], this.pretty]);
                    if(keyJSON != null && valueJSON != null) {
                        if(addComma) {
                            pieces.push(',');
                        }
                        pieces.push(this.writeNewline(), this.writeIndent(),
                                    keyJSON, ':', this.writeSpace(), valueJSON);
                        addComma = true;
                    }
                }
            }
            
            this.level -= 1;
            pieces.push(this.writeNewline(), this.writeIndent(), '}');
            return pieces.join('');
        },
        
        /**
         * Method: serialize.array
         * Transform an array into a JSON string.
         *
         * Parameters:
         * array - {Array} The array to be serialized
         * 
         * Returns:
         * {String} A JSON string representing the array.
         */
        'array': function(array) {
            var json;
            var pieces = ['['];
            this.level += 1;
    
            for(var i=0, len=array.length; i<len; ++i) {
                // recursive calls need to allow for sub-classing
                json = OpenLayers.Format.JSON.prototype.write.apply(this,
                                                    [array[i], this.pretty]);
                if(json != null) {
                    if(i > 0) {
                        pieces.push(',');
                    }
                    pieces.push(this.writeNewline(), this.writeIndent(), json);
                }
            }

            this.level -= 1;    
            pieces.push(this.writeNewline(), this.writeIndent(), ']');
            return pieces.join('');
        },
        
        /**
         * Method: serialize.string
         * Transform a string into a JSON string.
         *
         * Parameters:
         * string - {String} The string to be serialized
         * 
         * Returns:
         * {String} A JSON string representing the string.
         */
        'string': function(string) {
            // If the string contains no control characters, no quote characters, and no
            // backslash characters, then we can simply slap some quotes around it.
            // Otherwise we must also replace the offending characters with safe
            // sequences.    
            var m = {
                '\b': '\\b',
                '\t': '\\t',
                '\n': '\\n',
                '\f': '\\f',
                '\r': '\\r',
                '"' : '\\"',
                '\\': '\\\\'
            };
            if(/["\\\x00-\x1f]/.test(string)) {
                return '"' + string.replace(/([\x00-\x1f\\"])/g, function(a, b) {
                    var c = m[b];
                    if(c) {
                        return c;
                    }
                    c = b.charCodeAt();
                    return '\\u00' +
                        Math.floor(c / 16).toString(16) +
                        (c % 16).toString(16);
                }) + '"';
            }
            return '"' + string + '"';
        },

        /**
         * Method: serialize.number
         * Transform a number into a JSON string.
         *
         * Parameters:
         * number - {Number} The number to be serialized.
         *
         * Returns:
         * {String} A JSON string representing the number.
         */
        'number': function(number) {
            return isFinite(number) ? String(number) : "null";
        },
        
        /**
         * Method: serialize.boolean
         * Transform a boolean into a JSON string.
         *
         * Parameters:
         * bool - {Boolean} The boolean to be serialized.
         * 
         * Returns:
         * {String} A JSON string representing the boolean.
         */
        'boolean': function(bool) {
            return String(bool);
        },
        
        /**
         * Method: serialize.object
         * Transform a date into a JSON string.
         *
         * Parameters:
         * date - {Date} The date to be serialized.
         * 
         * Returns:
         * {String} A JSON string representing the date.
         */
        'date': function(date) {    
            function format(number) {
                // Format integers to have at least two digits.
                return (number < 10) ? '0' + number : number;
            }
            return '"' + date.getFullYear() + '-' +
                    format(date.getMonth() + 1) + '-' +
                    format(date.getDate()) + 'T' +
                    format(date.getHours()) + ':' +
                    format(date.getMinutes()) + ':' +
                    format(date.getSeconds()) + '"';
        }
    },

    CLASS_NAME: "OpenLayers.Format.JSON" 

});     
/* ======================================================================
    OpenLayers/Format/GeoJSON.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/JSON.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/MultiPoint.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Geometry/MultiLineString.js
 * @requires OpenLayers/Geometry/Polygon.js
 * @requires OpenLayers/Geometry/MultiPolygon.js
 * @requires OpenLayers/Console.js
 */

/**
 * Class: OpenLayers.Format.GeoJSON
 * Read and write GeoJSON. Create a new parser with the
 *     <OpenLayers.Format.GeoJSON> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.JSON>
 */
OpenLayers.Format.GeoJSON = OpenLayers.Class(OpenLayers.Format.JSON, {

    /**
     * APIProperty: ignoreExtraDims
     * {Boolean} Ignore dimensions higher than 2 when reading geometry
     * coordinates.
     */ 
    ignoreExtraDims: false,
    
    /**
     * Constructor: OpenLayers.Format.GeoJSON
     * Create a new parser for GeoJSON.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Deserialize a GeoJSON string.
     *
     * Parameters:
     * json - {String} A GeoJSON string
     * type - {String} Optional string that determines the structure of
     *     the output.  Supported values are "Geometry", "Feature", and
     *     "FeatureCollection".  If absent or null, a default of
     *     "FeatureCollection" is assumed.
     * filter - {Function} A function which will be called for every key and
     *     value at every level of the final result. Each value will be
     *     replaced by the result of the filter function. This can be used to
     *     reform generic objects into instances of classes, or to transform
     *     date strings into Date objects.
     *
     * Returns: 
     * {Object} The return depends on the value of the type argument. If type
     *     is "FeatureCollection" (the default), the return will be an array
     *     of <OpenLayers.Feature.Vector>. If type is "Geometry", the input json
     *     must represent a single geometry, and the return will be an
     *     <OpenLayers.Geometry>.  If type is "Feature", the input json must
     *     represent a single feature, and the return will be an
     *     <OpenLayers.Feature.Vector>.
     */
    read: function(json, type, filter) {
        type = (type) ? type : "FeatureCollection";
        var results = null;
        var obj = null;
        if (typeof json == "string") {
            obj = OpenLayers.Format.JSON.prototype.read.apply(this,
                                                              [json, filter]);
        } else { 
            obj = json;
        }    
        if(!obj) {
            OpenLayers.Console.error("Bad JSON: " + json);
        } else if(typeof(obj.type) != "string") {
            OpenLayers.Console.error("Bad GeoJSON - no type: " + json);
        } else if(this.isValidType(obj, type)) {
            switch(type) {
                case "Geometry":
                    try {
                        results = this.parseGeometry(obj);
                    } catch(err) {
                        OpenLayers.Console.error(err);
                    }
                    break;
                case "Feature":
                    try {
                        results = this.parseFeature(obj);
                        results.type = "Feature";
                    } catch(err) {
                        OpenLayers.Console.error(err);
                    }
                    break;
                case "FeatureCollection":
                    // for type FeatureCollection, we allow input to be any type
                    results = [];
                    switch(obj.type) {
                        case "Feature":
                            try {
                                results.push(this.parseFeature(obj));
                            } catch(err) {
                                results = null;
                                OpenLayers.Console.error(err);
                            }
                            break;
                        case "FeatureCollection":
                            for(var i=0, len=obj.features.length; i<len; ++i) {
                                try {
                                    results.push(this.parseFeature(obj.features[i]));
                                } catch(err) {
                                    results = null;
                                    OpenLayers.Console.error(err);
                                }
                            }
                            break;
                        default:
                            try {
                                var geom = this.parseGeometry(obj);
                                results.push(new OpenLayers.Feature.Vector(geom));
                            } catch(err) {
                                results = null;
                                OpenLayers.Console.error(err);
                            }
                    }
                break;
            }
        }
        return results;
    },
    
    /**
     * Method: isValidType
     * Check if a GeoJSON object is a valid representative of the given type.
     *
     * Returns:
     * {Boolean} The object is valid GeoJSON object of the given type.
     */
    isValidType: function(obj, type) {
        var valid = false;
        switch(type) {
            case "Geometry":
                if(OpenLayers.Util.indexOf(
                    ["Point", "MultiPoint", "LineString", "MultiLineString",
                     "Polygon", "MultiPolygon", "Box", "GeometryCollection"],
                    obj.type) == -1) {
                    // unsupported geometry type
                    OpenLayers.Console.error("Unsupported geometry type: " +
                                              obj.type);
                } else {
                    valid = true;
                }
                break;
            case "FeatureCollection":
                // allow for any type to be converted to a feature collection
                valid = true;
                break;
            default:
                // for Feature types must match
                if(obj.type == type) {
                    valid = true;
                } else {
                    OpenLayers.Console.error("Cannot convert types from " +
                                              obj.type + " to " + type);
                }
        }
        return valid;
    },
    
    /**
     * Method: parseFeature
     * Convert a feature object from GeoJSON into an
     *     <OpenLayers.Feature.Vector>.
     *
     * Parameters:
     * obj - {Object} An object created from a GeoJSON object
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A feature.
     */
    parseFeature: function(obj) {
        var feature, geometry, attributes, bbox;
        attributes = (obj.properties) ? obj.properties : {};
        bbox = (obj.geometry && obj.geometry.bbox) || obj.bbox;
        try {
            geometry = this.parseGeometry(obj.geometry);
        } catch(err) {
            // deal with bad geometries
            throw err;
        }
        feature = new OpenLayers.Feature.Vector(geometry, attributes);
        if(bbox) {
            feature.bounds = OpenLayers.Bounds.fromArray(bbox);
        }
        if(obj.id) {
            feature.fid = obj.id;
        }
        return feature;
    },
    
    /**
     * Method: parseGeometry
     * Convert a geometry object from GeoJSON into an <OpenLayers.Geometry>.
     *
     * Parameters:
     * obj - {Object} An object created from a GeoJSON object
     *
     * Returns: 
     * {<OpenLayers.Geometry>} A geometry.
     */
    parseGeometry: function(obj) {
        if (obj == null) {
            return null;
        }
        var geometry, collection = false;
        if(obj.type == "GeometryCollection") {
            if(!(OpenLayers.Util.isArray(obj.geometries))) {
                throw "GeometryCollection must have geometries array: " + obj;
            }
            var numGeom = obj.geometries.length;
            var components = new Array(numGeom);
            for(var i=0; i<numGeom; ++i) {
                components[i] = this.parseGeometry.apply(
                    this, [obj.geometries[i]]
                );
            }
            geometry = new OpenLayers.Geometry.Collection(components);
            collection = true;
        } else {
            if(!(OpenLayers.Util.isArray(obj.coordinates))) {
                throw "Geometry must have coordinates array: " + obj;
            }
            if(!this.parseCoords[obj.type.toLowerCase()]) {
                throw "Unsupported geometry type: " + obj.type;
            }
            try {
                geometry = this.parseCoords[obj.type.toLowerCase()].apply(
                    this, [obj.coordinates]
                );
            } catch(err) {
                // deal with bad coordinates
                throw err;
            }
        }
        // We don't reproject collections because the children are reprojected
        // for us when they are created.
        if (this.internalProjection && this.externalProjection && !collection) {
            geometry.transform(this.externalProjection, 
                               this.internalProjection); 
        }                       
        return geometry;
    },
    
    /**
     * Property: parseCoords
     * Object with properties corresponding to the GeoJSON geometry types.
     *     Property values are functions that do the actual parsing.
     */
    parseCoords: {
        /**
         * Method: parseCoords.point
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Parameters:
         * array - {Object} The coordinates array from the GeoJSON fragment.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "point": function(array) {
            if (this.ignoreExtraDims == false && 
                  array.length != 2) {
                    throw "Only 2D points are supported: " + array;
            }
            return new OpenLayers.Geometry.Point(array[0], array[1]);
        },
        
        /**
         * Method: parseCoords.multipoint
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Parameters:
         * array - {Object} The coordinates array from the GeoJSON fragment.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "multipoint": function(array) {
            var points = [];
            var p = null;
            for(var i=0, len=array.length; i<len; ++i) {
                try {
                    p = this.parseCoords["point"].apply(this, [array[i]]);
                } catch(err) {
                    throw err;
                }
                points.push(p);
            }
            return new OpenLayers.Geometry.MultiPoint(points);
        },

        /**
         * Method: parseCoords.linestring
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Parameters:
         * array - {Object} The coordinates array from the GeoJSON fragment.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "linestring": function(array) {
            var points = [];
            var p = null;
            for(var i=0, len=array.length; i<len; ++i) {
                try {
                    p = this.parseCoords["point"].apply(this, [array[i]]);
                } catch(err) {
                    throw err;
                }
                points.push(p);
            }
            return new OpenLayers.Geometry.LineString(points);
        },
        
        /**
         * Method: parseCoords.multilinestring
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Parameters:
         * array - {Object} The coordinates array from the GeoJSON fragment.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "multilinestring": function(array) {
            var lines = [];
            var l = null;
            for(var i=0, len=array.length; i<len; ++i) {
                try {
                    l = this.parseCoords["linestring"].apply(this, [array[i]]);
                } catch(err) {
                    throw err;
                }
                lines.push(l);
            }
            return new OpenLayers.Geometry.MultiLineString(lines);
        },
        
        /**
         * Method: parseCoords.polygon
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "polygon": function(array) {
            var rings = [];
            var r, l;
            for(var i=0, len=array.length; i<len; ++i) {
                try {
                    l = this.parseCoords["linestring"].apply(this, [array[i]]);
                } catch(err) {
                    throw err;
                }
                r = new OpenLayers.Geometry.LinearRing(l.components);
                rings.push(r);
            }
            return new OpenLayers.Geometry.Polygon(rings);
        },

        /**
         * Method: parseCoords.multipolygon
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Parameters:
         * array - {Object} The coordinates array from the GeoJSON fragment.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "multipolygon": function(array) {
            var polys = [];
            var p = null;
            for(var i=0, len=array.length; i<len; ++i) {
                try {
                    p = this.parseCoords["polygon"].apply(this, [array[i]]);
                } catch(err) {
                    throw err;
                }
                polys.push(p);
            }
            return new OpenLayers.Geometry.MultiPolygon(polys);
        },

        /**
         * Method: parseCoords.box
         * Convert a coordinate array from GeoJSON into an
         *     <OpenLayers.Geometry>.
         *
         * Parameters:
         * array - {Object} The coordinates array from the GeoJSON fragment.
         *
         * Returns:
         * {<OpenLayers.Geometry>} A geometry.
         */
        "box": function(array) {
            if(array.length != 2) {
                throw "GeoJSON box coordinates must have 2 elements";
            }
            return new OpenLayers.Geometry.Polygon([
                new OpenLayers.Geometry.LinearRing([
                    new OpenLayers.Geometry.Point(array[0][0], array[0][1]),
                    new OpenLayers.Geometry.Point(array[1][0], array[0][1]),
                    new OpenLayers.Geometry.Point(array[1][0], array[1][1]),
                    new OpenLayers.Geometry.Point(array[0][0], array[1][1]),
                    new OpenLayers.Geometry.Point(array[0][0], array[0][1])
                ])
            ]);
        }

    },

    /**
     * APIMethod: write
     * Serialize a feature, geometry, array of features into a GeoJSON string.
     *
     * Parameters:
     * obj - {Object} An <OpenLayers.Feature.Vector>, <OpenLayers.Geometry>,
     *     or an array of features.
     * pretty - {Boolean} Structure the output with newlines and indentation.
     *     Default is false.
     *
     * Returns:
     * {String} The GeoJSON string representation of the input geometry,
     *     features, or array of features.
     */
    write: function(obj, pretty) {
        var geojson = {
            "type": null
        };
        if(OpenLayers.Util.isArray(obj)) {
            geojson.type = "FeatureCollection";
            var numFeatures = obj.length;
            geojson.features = new Array(numFeatures);
            for(var i=0; i<numFeatures; ++i) {
                var element = obj[i];
                if(!element instanceof OpenLayers.Feature.Vector) {
                    var msg = "FeatureCollection only supports collections " +
                              "of features: " + element;
                    throw msg;
                }
                geojson.features[i] = this.extract.feature.apply(
                    this, [element]
                );
            }
        } else if (obj.CLASS_NAME.indexOf("OpenLayers.Geometry") == 0) {
            geojson = this.extract.geometry.apply(this, [obj]);
        } else if (obj instanceof OpenLayers.Feature.Vector) {
            geojson = this.extract.feature.apply(this, [obj]);
            if(obj.layer && obj.layer.projection) {
                geojson.crs = this.createCRSObject(obj);
            }
        }
        return OpenLayers.Format.JSON.prototype.write.apply(this,
                                                            [geojson, pretty]);
    },

    /**
     * Method: createCRSObject
     * Create the CRS object for an object.
     *
     * Parameters:
     * object - {<OpenLayers.Feature.Vector>} 
     *
     * Returns:
     * {Object} An object which can be assigned to the crs property
     * of a GeoJSON object.
     */
    createCRSObject: function(object) {
       var proj = object.layer.projection.toString();
       var crs = {};
       if (proj.match(/epsg:/i)) {
           var code = parseInt(proj.substring(proj.indexOf(":") + 1));
           if (code == 4326) {
               crs = {
                   "type": "name",
                   "properties": {
                       "name": "urn:ogc:def:crs:OGC:1.3:CRS84"
                   }
               };
           } else {    
               crs = {
                   "type": "name",
                   "properties": {
                       "name": "EPSG:" + code
                   }
               };
           }    
       }
       return crs;
    },
    
    /**
     * Property: extract
     * Object with properties corresponding to the GeoJSON types.
     *     Property values are functions that do the actual value extraction.
     */
    extract: {
        /**
         * Method: extract.feature
         * Return a partial GeoJSON object representing a single feature.
         *
         * Parameters:
         * feature - {<OpenLayers.Feature.Vector>}
         *
         * Returns:
         * {Object} An object representing the point.
         */
        'feature': function(feature) {
            var geom = this.extract.geometry.apply(this, [feature.geometry]);
            var json = {
                "type": "Feature",
                "properties": feature.attributes,
                "geometry": geom
            };
            if (feature.fid != null) {
                json.id = feature.fid;
            }
            return json;
        },
        
        /**
         * Method: extract.geometry
         * Return a GeoJSON object representing a single geometry.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry>}
         *
         * Returns:
         * {Object} An object representing the geometry.
         */
        'geometry': function(geometry) {
            if (geometry == null) {
                return null;
            }
            if (this.internalProjection && this.externalProjection) {
                geometry = geometry.clone();
                geometry.transform(this.internalProjection, 
                                   this.externalProjection);
            }                       
            var geometryType = geometry.CLASS_NAME.split('.')[2];
            var data = this.extract[geometryType.toLowerCase()].apply(this, [geometry]);
            var json;
            if(geometryType == "Collection") {
                json = {
                    "type": "GeometryCollection",
                    "geometries": data
                };
            } else {
                json = {
                    "type": geometryType,
                    "coordinates": data
                };
            }
            
            return json;
        },

        /**
         * Method: extract.point
         * Return an array of coordinates from a point.
         *
         * Parameters:
         * point - {<OpenLayers.Geometry.Point>}
         *
         * Returns: 
         * {Array} An array of coordinates representing the point.
         */
        'point': function(point) {
            return [point.x, point.y];
        },

        /**
         * Method: extract.multipoint
         * Return an array of point coordinates from a multipoint.
         *
         * Parameters:
         * multipoint - {<OpenLayers.Geometry.MultiPoint>}
         *
         * Returns:
         * {Array} An array of point coordinate arrays representing
         *     the multipoint.
         */
        'multipoint': function(multipoint) {
            var array = [];
            for(var i=0, len=multipoint.components.length; i<len; ++i) {
                array.push(this.extract.point.apply(this, [multipoint.components[i]]));
            }
            return array;
        },
        
        /**
         * Method: extract.linestring
         * Return an array of coordinate arrays from a linestring.
         *
         * Parameters:
         * linestring - {<OpenLayers.Geometry.LineString>}
         *
         * Returns:
         * {Array} An array of coordinate arrays representing
         *     the linestring.
         */
        'linestring': function(linestring) {
            var array = [];
            for(var i=0, len=linestring.components.length; i<len; ++i) {
                array.push(this.extract.point.apply(this, [linestring.components[i]]));
            }
            return array;
        },

        /**
         * Method: extract.multilinestring
         * Return an array of linestring arrays from a linestring.
         * 
         * Parameters:
         * multilinestring - {<OpenLayers.Geometry.MultiLineString>}
         * 
         * Returns:
         * {Array} An array of linestring arrays representing
         *     the multilinestring.
         */
        'multilinestring': function(multilinestring) {
            var array = [];
            for(var i=0, len=multilinestring.components.length; i<len; ++i) {
                array.push(this.extract.linestring.apply(this, [multilinestring.components[i]]));
            }
            return array;
        },
        
        /**
         * Method: extract.polygon
         * Return an array of linear ring arrays from a polygon.
         *
         * Parameters:
         * polygon - {<OpenLayers.Geometry.Polygon>}
         * 
         * Returns:
         * {Array} An array of linear ring arrays representing the polygon.
         */
        'polygon': function(polygon) {
            var array = [];
            for(var i=0, len=polygon.components.length; i<len; ++i) {
                array.push(this.extract.linestring.apply(this, [polygon.components[i]]));
            }
            return array;
        },

        /**
         * Method: extract.multipolygon
         * Return an array of polygon arrays from a multipolygon.
         * 
         * Parameters:
         * multipolygon - {<OpenLayers.Geometry.MultiPolygon>}
         * 
         * Returns:
         * {Array} An array of polygon arrays representing
         *     the multipolygon
         */
        'multipolygon': function(multipolygon) {
            var array = [];
            for(var i=0, len=multipolygon.components.length; i<len; ++i) {
                array.push(this.extract.polygon.apply(this, [multipolygon.components[i]]));
            }
            return array;
        },
        
        /**
         * Method: extract.collection
         * Return an array of geometries from a geometry collection.
         * 
         * Parameters:
         * collection - {<OpenLayers.Geometry.Collection>}
         * 
         * Returns:
         * {Array} An array of geometry objects representing the geometry
         *     collection.
         */
        'collection': function(collection) {
            var len = collection.components.length;
            var array = new Array(len);
            for(var i=0; i<len; ++i) {
                array[i] = this.extract.geometry.apply(
                    this, [collection.components[i]]
                );
            }
            return array;
        }
        

    },

    CLASS_NAME: "OpenLayers.Format.GeoJSON" 

});     
/* ======================================================================
    OpenLayers/Protocol/Script.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Format/GeoJSON.js
 */

/**
 * if application uses the query string, for example, for BBOX parameters,
 * OpenLayers/Format/QueryStringFilter.js should be included in the build config file
 */

/**
 * Class: OpenLayers.Protocol.Script
 * A basic Script protocol for vector layers.  Create a new instance with the
 *     <OpenLayers.Protocol.Script> constructor.  A script protocol is used to
 *     get around the same origin policy.  It works with services that return
 *     JSONP - that is, JSON wrapped in a client-specified callback.  The
 *     protocol handles fetching and parsing of feature data and sends parsed
 *     features to the <callback> configured with the protocol.  The protocol
 *     expects features serialized as GeoJSON by default, but can be configured
 *     to work with other formats by setting the <format> property.
 *
 * Inherits from:
 *  - <OpenLayers.Protocol>
 */
OpenLayers.Protocol.Script = OpenLayers.Class(OpenLayers.Protocol, {

    /**
     * APIProperty: url
     * {String} Service URL.  The service is expected to return serialized 
     *     features wrapped in a named callback (where the callback name is
     *     generated by this protocol).
     *     Read-only, set through the options passed to the constructor.
     */
    url: null,

    /**
     * APIProperty: params
     * {Object} Query string parameters to be appended to the URL.
     *     Read-only, set through the options passed to the constructor.
     *     Example: {maxFeatures: 50}
     */
    params: null,
    
    /**
     * APIProperty: callback
     * {Object} Function to be called when the <read> operation completes.
     */
    callback: null,

    /**
     * APIProperty: callbackTemplate
     * {String} Template for creating a unique callback function name
     * for the registry. Should include ${id}.  The ${id} variable will be
     * replaced with a string identifier prefixed with a "c" (e.g. c1, c2).
     * Default is "OpenLayers.Protocol.Script.registry.${id}".
     */
    callbackTemplate: "OpenLayers.Protocol.Script.registry.${id}",

    /**
     * APIProperty: callbackKey
     * {String} The name of the query string parameter that the service 
     *     recognizes as the callback identifier.  Default is "callback".
     *     This key is used to generate the URL for the script.  For example
     *     setting <callbackKey> to "myCallback" would result in a URL like 
     *     http://example.com/?myCallback=...
     */
    callbackKey: "callback",

    /**
     * APIProperty: callbackPrefix
     * {String} Where a service requires that the callback query string 
     *     parameter value is prefixed by some string, this value may be set.
     *     For example, setting <callbackPrefix> to "foo:" would result in a
     *     URL like http://example.com/?callback=foo:...  Default is "".
     */
    callbackPrefix: "",

    /**
     * APIProperty: scope
     * {Object} Optional ``this`` object for the callback. Read-only, set 
     *     through the options passed to the constructor.
     */
    scope: null,

    /**
     * APIProperty: format
     * {<OpenLayers.Format>} Format for parsing features.  Default is an 
     *     <OpenLayers.Format.GeoJSON> format.  If an alternative is provided,
     *     the format's read method must take an object and return an array
     *     of features.
     */
    format: null,

    /**
     * Property: pendingRequests
     * {Object} References all pending requests.  Property names are script 
     *     identifiers and property values are script elements.
     */
    pendingRequests: null,

    /**
     * APIProperty: srsInBBOX
     * {Boolean} Include the SRS identifier in BBOX query string parameter.
     *     Setting this property has no effect if a custom filterToParams method
     *     is provided.   Default is false.  If true and the layer has a 
     *     projection object set, any BBOX filter will be serialized with a 
     *     fifth item identifying the projection.  
     *     E.g. bbox=-1000,-1000,1000,1000,EPSG:900913
     */
    srsInBBOX: false,

    /**
     * Constructor: OpenLayers.Protocol.Script
     * A class for giving layers generic Script protocol.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options include:
     * url - {String}
     * params - {Object}
     * callback - {Function}
     * scope - {Object}
     */
    initialize: function(options) {
        options = options || {};
        this.params = {};
        this.pendingRequests = {};
        OpenLayers.Protocol.prototype.initialize.apply(this, arguments);
        if (!this.format) {
            this.format = new OpenLayers.Format.GeoJSON();
        }

        if (!this.filterToParams && OpenLayers.Format.QueryStringFilter) {
            var format = new OpenLayers.Format.QueryStringFilter({
                srsInBBOX: this.srsInBBOX
            });
            this.filterToParams = function(filter, params) {
                return format.write(filter, params);
            };
        }
    },
    
    /**
     * APIMethod: read
     * Construct a request for reading new features.
     *
     * Parameters:
     * options - {Object} Optional object for configuring the request.
     *     This object is modified and should not be reused.
     *
     * Valid options:
     * url - {String} Url for the request.
     * params - {Object} Parameters to get serialized as a query string.
     * filter - {<OpenLayers.Filter>} Filter to get serialized as a
     *     query string.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} A response object, whose "priv" property
     *     references the injected script.  This object is also passed to the
     *     callback function when the request completes, its "features" property
     *     is then populated with the features received from the server.
     */
    read: function(options) {
        OpenLayers.Protocol.prototype.read.apply(this, arguments);
        options = OpenLayers.Util.applyDefaults(options, this.options);
        options.params = OpenLayers.Util.applyDefaults(
            options.params, this.options.params
        );
        if (options.filter && this.filterToParams) {
            options.params = this.filterToParams(
                options.filter, options.params
            );
        }
        var response = new OpenLayers.Protocol.Response({requestType: "read"});
        var request = this.createRequest(
            options.url, 
            options.params, 
            OpenLayers.Function.bind(function(data) {
                response.data = data;
                this.handleRead(response, options);
            }, this)
        );
        response.priv = request;
        return response;
    },

    /** 
     * APIMethod: filterToParams 
     * Optional method to translate an <OpenLayers.Filter> object into an object 
     *     that can be serialized as request query string provided.  If a custom 
     *     method is not provided, any filter will not be serialized. 
     * 
     * Parameters: 
     * filter - {<OpenLayers.Filter>} filter to convert. 
     * params - {Object} The parameters object. 
     * 
     * Returns: 
     * {Object} The resulting parameters object. 
     */

    /** 
     * Method: createRequest
     * Issues a request for features by creating injecting a script in the 
     *     document head.
     *
     * Parameters:
     * url - {String} Service URL.
     * params - {Object} Query string parameters.
     * callback - {Function} Callback to be called with resulting data.
     *
     * Returns:
     * {HTMLScriptElement} The script pending execution.
     */
    createRequest: function(url, params, callback) {
        var id = OpenLayers.Protocol.Script.register(callback);
        var name = OpenLayers.String.format(this.callbackTemplate, {id: id});
        params = OpenLayers.Util.extend({}, params);
        params[this.callbackKey] = this.callbackPrefix + name;
        url = OpenLayers.Util.urlAppend(
            url, OpenLayers.Util.getParameterString(params)
        );
        var script = document.createElement("script");
        script.type = "text/javascript";
        script.src = url;
        script.id = "OpenLayers_Protocol_Script_" + id;
        this.pendingRequests[script.id] = script;
        var head = document.getElementsByTagName("head")[0];
        head.appendChild(script);
        return script;
    },
    
    /** 
     * Method: destroyRequest
     * Remove a script node associated with a response from the document.  Also
     *     unregisters the callback and removes the script from the 
     *     <pendingRequests> object.
     *
     * Parameters:
     * script - {HTMLScriptElement}
     */
    destroyRequest: function(script) {
        OpenLayers.Protocol.Script.unregister(script.id.split("_").pop());
        delete this.pendingRequests[script.id];
        if (script.parentNode) {
            script.parentNode.removeChild(script);
        }
    },

    /**
     * Method: handleRead
     * Individual callbacks are created for read, create and update, should
     *     a subclass need to override each one separately.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     the user callback.
     * options - {Object} The user options passed to the read call.
     */
    handleRead: function(response, options) {
        this.handleResponse(response, options);
    },

    /**
     * Method: handleResponse
     * Called by CRUD specific handlers.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     any user callback.
     * options - {Object} The user options passed to the create, read, update,
     *     or delete call.
     */
    handleResponse: function(response, options) {
        if (options.callback) {
            if (response.data) {
                response.features = this.parseFeatures(response.data);
                response.code = OpenLayers.Protocol.Response.SUCCESS;
            } else {
                response.code = OpenLayers.Protocol.Response.FAILURE;
            }
            this.destroyRequest(response.priv);
            options.callback.call(options.scope, response);
        }
    },

    /**
     * Method: parseFeatures
     * Read Script response body and return features.
     *
     * Parameters:
     * data - {Object} The data sent to the callback function by the server.
     *
     * Returns:
     * {Array({<OpenLayers.Feature.Vector>})} or
     *     {<OpenLayers.Feature.Vector>} Array of features or a single feature.
     */
    parseFeatures: function(data) {
        return this.format.read(data);
    },

    /**
     * APIMethod: abort
     * Abort an ongoing request.  If no response is provided, all pending 
     *     requests will be aborted.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object returned
     *     from a <read> request.
     */
    abort: function(response) {
        if (response) {
            this.destroyRequest(response.priv);
        } else {
            for (var key in this.pendingRequests) {
                this.destroyRequest(this.pendingRequests[key]);
            }
        }
    },
    
    /**
     * APIMethod: destroy
     * Clean up the protocol.
     */
    destroy: function() {
        this.abort();
        delete this.params;
        delete this.format;
        OpenLayers.Protocol.prototype.destroy.apply(this);
    },

    CLASS_NAME: "OpenLayers.Protocol.Script" 
});

(function() {
    var o = OpenLayers.Protocol.Script;
    var counter = 0;
    o.registry = {};
    
    /**
     * Function: OpenLayers.Protocol.Script.register
     * Register a callback for a newly created script.
     *
     * Parameters:
     * callback - {Function} The callback to be executed when the newly added
     *     script loads.  This callback will be called with a single argument
     *     that is the JSON returned by the service.
     *
     * Returns:
     * {Number} An identifier for retrieving the registered callback.
     */
    o.register = function(callback) {
        var id = "c"+(++counter);
        o.registry[id] = function() {
            callback.apply(this, arguments);
        };
        return id;
    };
    
    /**
     * Function: OpenLayers.Protocol.Script.unregister
     * Unregister a callback previously registered with the register function.
     *
     * Parameters:
     * id - {Number} The identifer returned by the register function.
     */
    o.unregister = function(id) {
        delete o.registry[id];
    };
})();
/* ======================================================================
    OpenLayers/Control/Panel.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Events/buttonclick.js
 */

/**
 * Class: OpenLayers.Control.Panel
 * The Panel control is a container for other controls. With it toolbars
 * may be composed.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Panel = OpenLayers.Class(OpenLayers.Control, {
    /**
     * Property: controls
     * {Array(<OpenLayers.Control>)}
     */
    controls: null,    
    
    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /** 
     * APIProperty: defaultControl
     * {<OpenLayers.Control>} The control which is activated when the control is
     * activated (turned on), which also happens at instantiation.
     * If <saveState> is true, <defaultControl> will be nullified after the
     * first activation of the panel.
     */
    defaultControl: null,
    
    /**
     * APIProperty: saveState
     * {Boolean} If set to true, the active state of this panel's controls will
     * be stored on panel deactivation, and restored on reactivation. Default
     * is false.
     */
    saveState: false,
      
    /**
     * APIProperty: allowDepress
     * {Boolean} If is true the <OpenLayers.Control.TYPE_TOOL> controls can 
     *     be deactivated by clicking the icon that represents them.  Default 
     *     is false.
     */
    allowDepress: false,
    
    /**
     * Property: activeState
     * {Object} stores the active state of this panel's controls.
     */
    activeState: null,

    /**
     * Constructor: OpenLayers.Control.Panel
     * Create a new control panel.
     *
     * Each control in the panel is represented by an icon. When clicking 
     *     on an icon, the <activateControl> method is called.
     *
     * Specific properties for controls on a panel:
     * type - {Number} One of <OpenLayers.Control.TYPE_TOOL>,
     *     <OpenLayers.Control.TYPE_TOGGLE>, <OpenLayers.Control.TYPE_BUTTON>.
     *     If not provided, <OpenLayers.Control.TYPE_TOOL> is assumed.
     * title - {string} Text displayed when mouse is over the icon that 
     *     represents the control.     
     *
     * The <OpenLayers.Control.type> of a control determines the behavior when
     * clicking its icon:
     * <OpenLayers.Control.TYPE_TOOL> - The control is activated and other
     *     controls of this type in the same panel are deactivated. This is
     *     the default type.
     * <OpenLayers.Control.TYPE_TOGGLE> - The active state of the control is
     *     toggled.
     * <OpenLayers.Control.TYPE_BUTTON> - The
     *     <OpenLayers.Control.Button.trigger> method of the control is called,
     *     but its active state is not changed.
     *
     * If a control is <OpenLayers.Control.active>, it will be drawn with the
     * olControl[Name]ItemActive class, otherwise with the
     * olControl[Name]ItemInactive class.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.controls = [];
        this.activeState = {};
    },

    /**
     * APIMethod: destroy
     */
    destroy: function() {
        if (this.map) {
            this.map.events.unregister("buttonclick", this, this.onButtonClick);
        }
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
        for (var ctl, i = this.controls.length - 1; i >= 0; i--) {
            ctl = this.controls[i];
            if (ctl.events) {
                ctl.events.un({
                    activate: this.iconOn,
                    deactivate: this.iconOff
                });
            }
            ctl.panel_div = null;
        }
        this.activeState = null;
    },

    /**
     * APIMethod: activate
     */
    activate: function() {
        if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
            var control;
            for (var i=0, len=this.controls.length; i<len; i++) {
                control = this.controls[i];
                if (control === this.defaultControl ||
                            (this.saveState && this.activeState[control.id])) {
                    control.activate();
                }
            }    
            if (this.saveState === true) {
                this.defaultControl = null;
            }
            this.redraw();
            return true;
        } else {
            return false;
        }
    },
    
    /**
     * APIMethod: deactivate
     */
    deactivate: function() {
        if (OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
            var control;
            for (var i=0, len=this.controls.length; i<len; i++) {
                control = this.controls[i];
                this.activeState[control.id] = control.deactivate();
            }    
            this.redraw();
            return true;
        } else {
            return false;
        }
    },
    
    /**
     * Method: draw
     *
     * Returns:
     * {DOMElement}
     */    
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        if (this.outsideViewport) {
            this.events.attachToElement(this.div);
            this.events.register("buttonclick", this, this.onButtonClick);
        } else {
            this.map.events.register("buttonclick", this, this.onButtonClick);
        }
        this.addControlsToMap(this.controls);
        return this.div;
    },

    /**
     * Method: redraw
     */
    redraw: function() {
        for (var l=this.div.childNodes.length, i=l-1; i>=0; i--) {
            this.div.removeChild(this.div.childNodes[i]);
        }
        this.div.innerHTML = "";
        if (this.active) {
            for (var i=0, len=this.controls.length; i<len; i++) {
                this.div.appendChild(this.controls[i].panel_div);
            }
        }
    },
    
    /**
     * APIMethod: activateControl
     * This method is called when the user click on the icon representing a 
     *     control in the panel.
     *
     * Parameters:
     * control - {<OpenLayers.Control>}
     */
    activateControl: function (control) {
        if (!this.active) { return false; }
        if (control.type == OpenLayers.Control.TYPE_BUTTON) {
            control.trigger();
            return;
        }
        if (control.type == OpenLayers.Control.TYPE_TOGGLE) {
            if (control.active) {
                control.deactivate();
            } else {
                control.activate();
            }
            return;
        }
        if (this.allowDepress && control.active) {
            control.deactivate();
        } else {
            var c;
            for (var i=0, len=this.controls.length; i<len; i++) {
                c = this.controls[i];
                if (c != control &&
                   (c.type === OpenLayers.Control.TYPE_TOOL || c.type == null)) {
                    c.deactivate();
                }
            }
            control.activate();
        }
    },

    /**
     * APIMethod: addControls
     * To build a toolbar, you add a set of controls to it. addControls
     * lets you add a single control or a list of controls to the 
     * Control Panel.
     *
     * Parameters:
     * controls - {<OpenLayers.Control>} Controls to add in the panel.
     */    
    addControls: function(controls) {
        if (!(OpenLayers.Util.isArray(controls))) {
            controls = [controls];
        }
        this.controls = this.controls.concat(controls);

        for (var i=0, len=controls.length; i<len; i++) {
            var control = controls[i],
                element = this.createControlMarkup(control);
            OpenLayers.Element.addClass(element, 
                                        control.displayClass + "ItemInactive");
            OpenLayers.Element.addClass(element, "olButton");
            if (control.title != ""  && !element.title) {
                element.title = control.title;
            }
            control.panel_div = element;
        }

        if (this.map) { // map.addControl() has already been called on the panel
            this.addControlsToMap(controls);
            this.redraw();
        }
    },

    /**
     * APIMethod: createControlMarkup
     * This function just creates a div for the control. If specific HTML
     * markup is needed this function can be overridden in specific classes,
     * or at panel instantiation time:
     *
     * Example:
     * (code)
     * var panel = new OpenLayers.Control.Panel({
     *     defaultControl: control,
     *     // ovverride createControlMarkup to create actual buttons
     *     // including texts wrapped into span elements.
     *     createControlMarkup: function(control) {
     *         var button = document.createElement('button'),
     *             span = document.createElement('span');
     *         if (control.text) {
     *             span.innerHTML = control.text;
     *         }
     *         return button;
     *     }
     *  });
     * (end)
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control to create the HTML
     *     markup for.
     *
     * Returns:
     * {DOMElement} The markup.
     */
    createControlMarkup: function(control) {
        return document.createElement("div");
    },
   
    /**
     * Method: addControlsToMap
     * Only for internal use in draw() and addControls() methods.
     *
     * Parameters:
     * controls - {Array(<OpenLayers.Control>)} Controls to add into map.
     */         
    addControlsToMap: function (controls) {
        var control;
        for (var i=0, len=controls.length; i<len; i++) {
            control = controls[i];
            if (control.autoActivate === true) {
                control.autoActivate = false;
                this.map.addControl(control);
                control.autoActivate = true;
            } else {
                this.map.addControl(control);
                control.deactivate();
            }
            control.events.on({
                activate: this.iconOn,
                deactivate: this.iconOff
            });
        }  
    },

    /**
     * Method: iconOn
     * Internal use, for use only with "controls[i].events.on/un".
     */
     iconOn: function() {
        var d = this.panel_div; // "this" refers to a control on panel!
        var re = new RegExp("\\b(" + this.displayClass + "Item)Inactive\\b");
        d.className = d.className.replace(re, "$1Active");
    },

    /**
     * Method: iconOff
     * Internal use, for use only with "controls[i].events.on/un".
     */
     iconOff: function() {
        var d = this.panel_div; // "this" refers to a control on panel!
        var re = new RegExp("\\b(" + this.displayClass + "Item)Active\\b");
        d.className = d.className.replace(re, "$1Inactive");
    },
    
    /**
     * Method: onButtonClick
     *
     * Parameters:
     * evt - {Event}
     */
    onButtonClick: function (evt) {
        var controls = this.controls,
            button = evt.buttonElement;
        for (var i=controls.length-1; i>=0; --i) {
            if (controls[i].panel_div === button) {
                this.activateControl(controls[i]);
                break;
            }
        }
    },

    /**
     * APIMethod: getControlsBy
     * Get a list of controls with properties matching the given criteria.
     *
     * Parameters:
     * property - {String} A control property to be matched.
     * match - {String | Object} A string to match.  Can also be a regular
     *     expression literal or object.  In addition, it can be any object
     *     with a method named test.  For reqular expressions or other, if
     *     match.test(control[property]) evaluates to true, the control will be
     *     included in the array returned.  If no controls are found, an empty
     *     array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Control>)} A list of controls matching the given criteria.
     *     An empty array is returned if no matches are found.
     */
    getControlsBy: function(property, match) {
        var test = (typeof match.test == "function");
        var found = OpenLayers.Array.filter(this.controls, function(item) {
            return item[property] == match || (test && match.test(item[property]));
        });
        return found;
    },

    /**
     * APIMethod: getControlsByName
     * Get a list of contorls with names matching the given name.
     *
     * Parameters:
     * match - {String | Object} A control name.  The name can also be a regular
     *     expression literal or object.  In addition, it can be any object
     *     with a method named test.  For reqular expressions or other, if
     *     name.test(control.name) evaluates to true, the control will be included
     *     in the list of controls returned.  If no controls are found, an empty
     *     array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Control>)} A list of controls matching the given name.
     *     An empty array is returned if no matches are found.
     */
    getControlsByName: function(match) {
        return this.getControlsBy("name", match);
    },

    /**
     * APIMethod: getControlsByClass
     * Get a list of controls of a given type (CLASS_NAME).
     *
     * Parameters:
     * match - {String | Object} A control class name.  The type can also be a
     *     regular expression literal or object.  In addition, it can be any
     *     object with a method named test.  For reqular expressions or other,
     *     if type.test(control.CLASS_NAME) evaluates to true, the control will
     *     be included in the list of controls returned.  If no controls are
     *     found, an empty array is returned.
     *
     * Returns:
     * {Array(<OpenLayers.Control>)} A list of controls matching the given type.
     *     An empty array is returned if no matches are found.
     */
    getControlsByClass: function(match) {
        return this.getControlsBy("CLASS_NAME", match);
    },

    CLASS_NAME: "OpenLayers.Control.Panel"
});

/* ======================================================================
    OpenLayers/Control/ZoomIn.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.ZoomIn
 * The ZoomIn control is a button to increase the zoom level of a map.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.ZoomIn = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: type
     * {String} The type of <OpenLayers.Control> -- When added to a 
     *     <Control.Panel>, 'type' is used by the panel to determine how to 
     *     handle our events.
     */
    type: OpenLayers.Control.TYPE_BUTTON,
    
    /**
     * Method: trigger
     */
    trigger: function(){
        this.map.zoomIn();
    },

    CLASS_NAME: "OpenLayers.Control.ZoomIn"
});
/* ======================================================================
    OpenLayers/Control/ZoomOut.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.ZoomOut
 * The ZoomOut control is a button to decrease the zoom level of a map.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.ZoomOut = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: type
     * {String} The type of <OpenLayers.Control> -- When added to a 
     *     <Control.Panel>, 'type' is used by the panel to determine how to 
     *     handle our events.
     */
    type: OpenLayers.Control.TYPE_BUTTON,
    
    /**
     * Method: trigger
     */
    trigger: function(){
        this.map.zoomOut();
    },

    CLASS_NAME: "OpenLayers.Control.ZoomOut"
});
/* ======================================================================
    OpenLayers/Control/ZoomToMaxExtent.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.ZoomToMaxExtent 
 * The ZoomToMaxExtent control is a button that zooms out to the maximum
 * extent of the map. It is designed to be used with a 
 * <OpenLayers.Control.Panel>.
 * 
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.ZoomToMaxExtent = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: type
     * {String} The type of <OpenLayers.Control> -- When added to a 
     *     <Control.Panel>, 'type' is used by the panel to determine how to 
     *     handle our events.
     */
    type: OpenLayers.Control.TYPE_BUTTON,
    
    /*
     * Method: trigger
     * Do the zoom.
     */
    trigger: function() {
        if (this.map) {
            this.map.zoomToMaxExtent();
        }    
    },

    CLASS_NAME: "OpenLayers.Control.ZoomToMaxExtent"
});
/* ======================================================================
    OpenLayers/Control/ZoomPanel.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/Panel.js
 * @requires OpenLayers/Control/ZoomIn.js
 * @requires OpenLayers/Control/ZoomOut.js
 * @requires OpenLayers/Control/ZoomToMaxExtent.js
 */

/**
 * Class: OpenLayers.Control.ZoomPanel
 * The ZoomPanel control is a compact collecton of 3 zoom controls: a 
 * <OpenLayers.Control.ZoomIn>, a <OpenLayers.Control.ZoomToMaxExtent>, and a
 * <OpenLayers.Control.ZoomOut>. By default it is drawn in the upper left 
 * corner of the map.
 *
 * Note: 
 * If you wish to use this class with the default images and you want 
 *       it to look nice in ie6, you should add the following, conditionally
 *       added css stylesheet to your HTML file:
 * 
 * (code)
 * <!--[if lte IE 6]>
 *   <link rel="stylesheet" href="../theme/default/ie6-style.css" type="text/css" />
 * <![endif]-->
 * (end)
 * 
 * Inherits from:
 *  - <OpenLayers.Control.Panel>
 */
OpenLayers.Control.ZoomPanel = OpenLayers.Class(OpenLayers.Control.Panel, {

    /**
     * Constructor: OpenLayers.Control.ZoomPanel 
     * Add the three zooming controls.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(options) {
        OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);
        this.addControls([
            new OpenLayers.Control.ZoomIn(),
            new OpenLayers.Control.ZoomToMaxExtent(),
            new OpenLayers.Control.ZoomOut()
        ]);
    },

    CLASS_NAME: "OpenLayers.Control.ZoomPanel"
});
/* ======================================================================
    OpenLayers/Layer/HTTPRequest.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer.js
 */

/**
 * Class: OpenLayers.Layer.HTTPRequest
 * 
 * Inherits from: 
 *  - <OpenLayers.Layer>
 */
OpenLayers.Layer.HTTPRequest = OpenLayers.Class(OpenLayers.Layer, {

    /** 
     * Constant: URL_HASH_FACTOR
     * {Float} Used to hash URL param strings for multi-WMS server selection.
     *         Set to the Golden Ratio per Knuth's recommendation.
     */
    URL_HASH_FACTOR: (Math.sqrt(5) - 1) / 2,

    /** 
     * Property: url
     * {Array(String) or String} This is either an array of url strings or 
     *                           a single url string. 
     */
    url: null,

    /** 
     * Property: params
     * {Object} Hashtable of key/value parameters
     */
    params: null,
    
    /** 
     * APIProperty: reproject
     * *Deprecated*. See http://docs.openlayers.org/library/spherical_mercator.html
     * for information on the replacement for this functionality. 
     * {Boolean} Whether layer should reproject itself based on base layer 
     *           locations. This allows reprojection onto commercial layers. 
     *           Default is false: Most layers can't reproject, but layers 
     *           which can create non-square geographic pixels can, like WMS.
     *           
     */
    reproject: false,

    /**
     * Constructor: OpenLayers.Layer.HTTPRequest
     * 
     * Parameters:
     * name - {String}
     * url - {Array(String) or String}
     * params - {Object}
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, url, params, options) {
        OpenLayers.Layer.prototype.initialize.apply(this, [name, options]);
        this.url = url;
        if (!this.params) {
            this.params = OpenLayers.Util.extend({}, params);
        }
    },

    /**
     * APIMethod: destroy
     */
    destroy: function() {
        this.url = null;
        this.params = null;
        OpenLayers.Layer.prototype.destroy.apply(this, arguments); 
    },
    
    /**
     * APIMethod: clone
     * 
     * Parameters:
     * obj - {Object}
     * 
     * Returns:
     * {<OpenLayers.Layer.HTTPRequest>} An exact clone of this 
     *                                  <OpenLayers.Layer.HTTPRequest>
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.HTTPRequest(this.name,
                                                   this.url,
                                                   this.params,
                                                   this.getOptions());
        }
        
        //get all additions from superclasses
        obj = OpenLayers.Layer.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here
        
        return obj;
    },

    /** 
     * APIMethod: setUrl
     * 
     * Parameters:
     * newUrl - {String}
     */
    setUrl: function(newUrl) {
        this.url = newUrl;
    },

    /**
     * APIMethod: mergeNewParams
     * 
     * Parameters:
     * newParams - {Object}
     *
     * Returns:
     * redrawn: {Boolean} whether the layer was actually redrawn.
     */
    mergeNewParams:function(newParams) {
        this.params = OpenLayers.Util.extend(this.params, newParams);
        var ret = this.redraw();
        if(this.map != null) {
            this.map.events.triggerEvent("changelayer", {
                layer: this,
                property: "params"
            });
        }
        return ret;
    },

    /**
     * APIMethod: redraw
     * Redraws the layer.  Returns true if the layer was redrawn, false if not.
     *
     * Parameters:
     * force - {Boolean} Force redraw by adding random parameter.
     *
     * Returns:
     * {Boolean} The layer was redrawn.
     */
    redraw: function(force) { 
        if (force) {
            return this.mergeNewParams({"_olSalt": Math.random()});
        } else {
            return OpenLayers.Layer.prototype.redraw.apply(this, []);
        }
    },
    
    /**
     * Method: selectUrl
     * selectUrl() implements the standard floating-point multiplicative
     *     hash function described by Knuth, and hashes the contents of the 
     *     given param string into a float between 0 and 1. This float is then
     *     scaled to the size of the provided urls array, and used to select
     *     a URL.
     *
     * Parameters:
     * paramString - {String}
     * urls - {Array(String)}
     * 
     * Returns:
     * {String} An entry from the urls array, deterministically selected based
     *          on the paramString.
     */
    selectUrl: function(paramString, urls) {
        var product = 1;
        for (var i=0, len=paramString.length; i<len; i++) { 
            product *= paramString.charCodeAt(i) * this.URL_HASH_FACTOR; 
            product -= Math.floor(product); 
        }
        return urls[Math.floor(product * urls.length)];
    },

    /** 
     * Method: getFullRequestString
     * Combine url with layer's params and these newParams. 
     *   
     *    does checking on the serverPath variable, allowing for cases when it 
     *     is supplied with trailing ? or &, as well as cases where not. 
     *
     *    return in formatted string like this:
     *        "server?key1=value1&key2=value2&key3=value3"
     * 
     * WARNING: The altUrl parameter is deprecated and will be removed in 3.0.
     *
     * Parameters:
     * newParams - {Object}
     * altUrl - {String} Use this as the url instead of the layer's url
     *   
     * Returns: 
     * {String}
     */
    getFullRequestString:function(newParams, altUrl) {

        // if not altUrl passed in, use layer's url
        var url = altUrl || this.url;
        
        // create a new params hashtable with all the layer params and the 
        // new params together. then convert to string
        var allParams = OpenLayers.Util.extend({}, this.params);
        allParams = OpenLayers.Util.extend(allParams, newParams);
        var paramsString = OpenLayers.Util.getParameterString(allParams);
        
        // if url is not a string, it should be an array of strings, 
        // in which case we will deterministically select one of them in 
        // order to evenly distribute requests to different urls.
        //
        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(paramsString, url);
        }   
 
        // ignore parameters that are already in the url search string
        var urlParams = 
            OpenLayers.Util.upperCaseObject(OpenLayers.Util.getParameters(url));
        for(var key in allParams) {
            if(key.toUpperCase() in urlParams) {
                delete allParams[key];
            }
        }
        paramsString = OpenLayers.Util.getParameterString(allParams);
        
        return OpenLayers.Util.urlAppend(url, paramsString);
    },

    CLASS_NAME: "OpenLayers.Layer.HTTPRequest"
});
/* ======================================================================
    OpenLayers/Tile.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 */

/**
 * Class: OpenLayers.Tile 
 * This is a class designed to designate a single tile, however
 *     it is explicitly designed to do relatively little. Tiles store 
 *     information about themselves -- such as the URL that they are related
 *     to, and their size - but do not add themselves to the layer div 
 *     automatically, for example. Create a new tile with the 
 *     <OpenLayers.Tile> constructor, or a subclass. 
 * 
 * TBD 3.0 - remove reference to url in above paragraph
 * 
 */
OpenLayers.Tile = OpenLayers.Class({
    
    /**
     * APIProperty: events
     * {<OpenLayers.Events>} An events object that handles all 
     *     events on the tile.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * tile.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types:
     * beforedraw - Triggered before the tile is drawn. Used to defer
     *     drawing to an animation queue. To defer drawing, listeners need
     *     to return false, which will abort drawing. The queue handler needs
     *     to call <draw>(true) to actually draw the tile.
     * loadstart - Triggered when tile loading starts.
     * loadend - Triggered when tile loading ends.
     * loaderror - Triggered before the loadend event (i.e. when the tile is
     *     still hidden) if the tile could not be loaded.
     * reload - Triggered when an already loading tile is reloaded.
     * unload - Triggered before a tile is unloaded.
     */
    events: null,

    /**
     * APIProperty: eventListeners
     * {Object} If set as an option at construction, the eventListeners
     *     object will be registered with <OpenLayers.Events.on>.  Object
     *     structure must be a listeners object as shown in the example for
     *     the events.on method.
     *
     * This options can be set in the ``tileOptions`` option from
     * <OpenLayers.Layer.Grid>. For example, to be notified of the
     * ``loadend`` event of each tiles:
     * (code)
     * new OpenLayers.Layer.OSM('osm', 'http://tile.openstreetmap.org/${z}/${x}/${y}.png', {
     *     tileOptions: {
     *         eventListeners: {
     *             'loadend': function(evt) {
     *                 // do something on loadend
     *             }
     *         }
     *     }
     * });
     * (end)
     */
    eventListeners: null,

    /**
     * Property: id 
     * {String} null
     */
    id: null,
    
    /** 
     * Property: layer 
     * {<OpenLayers.Layer>} layer the tile is attached to 
     */
    layer: null,
    
    /**
     * Property: url
     * {String} url of the request.
     *
     * TBD 3.0 
     * Deprecated. The base tile class does not need an url. This should be 
     * handled in subclasses. Does not belong here.
     */
    url: null,

    /** 
     * APIProperty: bounds 
     * {<OpenLayers.Bounds>} null
     */
    bounds: null,
    
    /** 
     * Property: size 
     * {<OpenLayers.Size>} null
     */
    size: null,
    
    /** 
     * Property: position 
     * {<OpenLayers.Pixel>} Top Left pixel of the tile
     */    
    position: null,
    
    /**
     * Property: isLoading
     * {Boolean} Is the tile loading?
     */
    isLoading: false,
    
    /** TBD 3.0 -- remove 'url' from the list of parameters to the constructor.
     *             there is no need for the base tile class to have a url.
     */

    /** 
     * Constructor: OpenLayers.Tile
     * Constructor for a new <OpenLayers.Tile> instance.
     * 
     * Parameters:
     * layer - {<OpenLayers.Layer>} layer that the tile will go in.
     * position - {<OpenLayers.Pixel>}
     * bounds - {<OpenLayers.Bounds>}
     * url - {<String>}
     * size - {<OpenLayers.Size>}
     * options - {Object}
     */   
    initialize: function(layer, position, bounds, url, size, options) {
        this.layer = layer;
        this.position = position.clone();
        this.setBounds(bounds);
        this.url = url;
        if (size) {
            this.size = size.clone();
        }

        //give the tile a unique id based on its BBOX.
        this.id = OpenLayers.Util.createUniqueID("Tile_");

        OpenLayers.Util.extend(this, options);

        this.events = new OpenLayers.Events(this);
        if (this.eventListeners instanceof Object) {
            this.events.on(this.eventListeners);
        }
    },

    /**
     * Method: unload
     * Call immediately before destroying if you are listening to tile
     * events, so that counters are properly handled if tile is still
     * loading at destroy-time. Will only fire an event if the tile is
     * still loading.
     */
    unload: function() {
       if (this.isLoading) { 
           this.isLoading = false; 
           this.events.triggerEvent("unload"); 
       }
    },
    
    /** 
     * APIMethod: destroy
     * Nullify references to prevent circular references and memory leaks.
     */
    destroy:function() {
        this.layer  = null;
        this.bounds = null;
        this.size = null;
        this.position = null;
        
        if (this.eventListeners) {
            this.events.un(this.eventListeners);
        }
        this.events.destroy();
        this.eventListeners = null;
        this.events = null;
    },
    
    /**
     * Method: draw
     * Clear whatever is currently in the tile, then return whether or not 
     *     it should actually be re-drawn. This is an example implementation
     *     that can be overridden by subclasses. The minimum thing to do here
     *     is to call <clear> and return the result from <shouldDraw>.
     *
     * Parameters:
     * deferred - {Boolean} When drawing was aborted by returning false from a
     *     *beforedraw* listener, the queue manager needs to pass true, so the
     *     tile will not be cleared and immediately be drawn. Otherwise, the
     *     tile will be cleared and a *beforedraw* event will be fired.
     * 
     * Returns:
     * {Boolean} Whether or not the tile should actually be drawn.
     */
    draw: function(deferred) {
        if (!deferred) {
            //clear tile's contents and mark as not drawn
            this.clear();
        }
        var draw = this.shouldDraw();
        if (draw && !deferred) {
            draw = this.events.triggerEvent("beforedraw") !== false;
        }
        return draw;
    },
    
    /**
     * Method: shouldDraw
     * Return whether or not the tile should actually be (re-)drawn. The only
     * case where we *wouldn't* want to draw the tile is if the tile is outside
     * its layer's maxExtent
     * 
     * Returns:
     * {Boolean} Whether or not the tile should actually be drawn.
     */
    shouldDraw: function() {        
        var withinMaxExtent = false,
            maxExtent = this.layer.maxExtent;
        if (maxExtent) {
            var map = this.layer.map;
            var worldBounds = map.baseLayer.wrapDateLine && map.getMaxExtent();
            if (this.bounds.intersectsBounds(maxExtent, {inclusive: false, worldBounds: worldBounds})) {
                withinMaxExtent = true;
            }
        }
        
        return withinMaxExtent || this.layer.displayOutsideMaxExtent;
    },
    
    /**
     * Method: setBounds
     * Sets the bounds on this instance
     *
     * Parameters:
     * bounds {<OpenLayers.Bounds>}
     */
    setBounds: function(bounds) {
        bounds = bounds.clone();
        if (this.layer.map.baseLayer.wrapDateLine) {
            var worldExtent = this.layer.map.getMaxExtent(),
                tolerance = this.layer.map.getResolution();
            bounds = bounds.wrapDateLine(worldExtent, {
                leftTolerance: tolerance,
                rightTolerance: tolerance
            });
        }
        this.bounds = bounds;
    },
    
    /** 
     * Method: moveTo
     * Reposition the tile.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * position - {<OpenLayers.Pixel>}
     * redraw - {Boolean} Call draw method on tile after moving.
     *     Default is true
     */
    moveTo: function (bounds, position, redraw) {
        if (redraw == null) {
            redraw = true;
        }

        this.setBounds(bounds);
        this.position = position.clone();
        if (redraw) {
            this.draw();
        }
    },

    /** 
     * Method: clear
     * Clear the tile of any bounds/position-related data so that it can 
     *     be reused in a new location.
     */
    clear: function(draw) {
        // to be extended by subclasses
    },
    
    CLASS_NAME: "OpenLayers.Tile"
});
/* ======================================================================
    OpenLayers/Tile/Image.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Tile.js
 * @requires OpenLayers/Animation.js
 */

/**
 * Class: OpenLayers.Tile.Image
 * Instances of OpenLayers.Tile.Image are used to manage the image tiles
 * used by various layers.  Create a new image tile with the
 * <OpenLayers.Tile.Image> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Tile>
 */
OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {

    /** 
     * APIProperty: url
     * {String} The URL of the image being requested. No default. Filled in by
     * layer.getURL() function. May be modified by loadstart listeners.
     */
    url: null,
    
    /** 
     * Property: imgDiv
     * {HTMLImageElement} The image for this tile.
     */
    imgDiv: null,
    
    /**
     * Property: frame
     * {DOMElement} The image element is appended to the frame.  Any gutter on
     * the image will be hidden behind the frame. If no gutter is set,
     * this will be null.
     */ 
    frame: null, 

    /** 
     * Property: imageReloadAttempts
     * {Integer} Attempts to load the image.
     */
    imageReloadAttempts: null,
    
    /**
     * Property: layerAlphaHack
     * {Boolean} True if the png alpha hack needs to be applied on the layer's div.
     */
    layerAlphaHack: null,
    
    /**
     * Property: asyncRequestId
     * {Integer} ID of an request to see if request is still valid. This is a
     * number which increments by 1 for each asynchronous request.
     */
    asyncRequestId: null,
    
    /**
     * Property: blankImageUrl
     * {String} Using a data scheme url is not supported by all browsers, but
     * we don't care because we either set it as css backgroundImage, or the
     * image's display style is set to "none" when we use it.
     */
    blankImageUrl: "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAQAIBRAA7",

    /**
     * APIProperty: maxGetUrlLength
     * {Number} If set, requests that would result in GET urls with more
     * characters than the number provided will be made using form-encoded
     * HTTP POST. It is good practice to avoid urls that are longer than 2048
     * characters.
     *
     * Caution:
     * Older versions of Gecko based browsers (e.g. Firefox < 3.5) and most
     * Opera versions do not fully support this option. On all browsers,
     * transition effects are not supported if POST requests are used.
     */
    maxGetUrlLength: null,

    /**
     * Property: canvasContext
     * {CanvasRenderingContext2D} A canvas context associated with
     * the tile image.
     */
    canvasContext: null,
    
    /**
     * APIProperty: crossOriginKeyword
     * The value of the crossorigin keyword to use when loading images. This is
     * only relevant when using <getCanvasContext> for tiles from remote
     * origins and should be set to either 'anonymous' or 'use-credentials'
     * for servers that send Access-Control-Allow-Origin headers with their
     * tiles.
     */
    crossOriginKeyword: null,

    /** TBD 3.0 - reorder the parameters to the init function to remove 
     *             URL. the getUrl() function on the layer gets called on 
     *             each draw(), so no need to specify it here.
     */

    /** 
     * Constructor: OpenLayers.Tile.Image
     * Constructor for a new <OpenLayers.Tile.Image> instance.
     * 
     * Parameters:
     * layer - {<OpenLayers.Layer>} layer that the tile will go in.
     * position - {<OpenLayers.Pixel>}
     * bounds - {<OpenLayers.Bounds>}
     * url - {<String>} Deprecated. Remove me in 3.0.
     * size - {<OpenLayers.Size>}
     * options - {Object}
     */   
    initialize: function(layer, position, bounds, url, size, options) {
        OpenLayers.Tile.prototype.initialize.apply(this, arguments);

        this.url = url; //deprecated remove me
        
        this.layerAlphaHack = this.layer.alpha && OpenLayers.Util.alphaHack();

        if (this.maxGetUrlLength != null || this.layer.gutter || this.layerAlphaHack) {
            // only create frame if it's needed
            this.frame = document.createElement("div");
            this.frame.style.position = "absolute";
            this.frame.style.overflow = "hidden";
        }
        if (this.maxGetUrlLength != null) {
            OpenLayers.Util.extend(this, OpenLayers.Tile.Image.IFrame);
        }
    },
    
    /** 
     * APIMethod: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {
        if (this.imgDiv)  {
            this.clear();
            this.imgDiv = null;
            this.frame = null;
        }
        // don't handle async requests any more
        this.asyncRequestId = null;
        OpenLayers.Tile.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: draw
     * Check that a tile should be drawn, and draw it.
     * 
     * Returns:
     * {Boolean} Was a tile drawn?
     */
    draw: function() {
        var drawn = OpenLayers.Tile.prototype.draw.apply(this, arguments);
        if (drawn) {
            // The layer's reproject option is deprecated.
            if (this.layer != this.layer.map.baseLayer && this.layer.reproject) {
                // getBoundsFromBaseLayer is defined in deprecated.js.
                this.bounds = this.getBoundsFromBaseLayer(this.position);
            }
            if (this.isLoading) {
                //if we're already loading, send 'reload' instead of 'loadstart'.
                this._loadEvent = "reload"; 
            } else {
                this.isLoading = true;
                this._loadEvent = "loadstart";
            }
            this.positionTile();
            this.renderTile();
        } else {
            this.unload();
        }
        return drawn;
    },
    
    /**
     * Method: renderTile
     * Internal function to actually initialize the image tile,
     *     position it correctly, and set its url.
     */
    renderTile: function() {
        this.layer.div.appendChild(this.getTile());
        if (this.layer.async) {
            // Asynchronous image requests call the asynchronous getURL method
            // on the layer to fetch an image that covers 'this.bounds'.
            var id = this.asyncRequestId = (this.asyncRequestId || 0) + 1;
            this.layer.getURLasync(this.bounds, function(url) {
                if (id == this.asyncRequestId) {
                    this.url = url;
                    this.initImage();
                }
            }, this);
        } else {
            // synchronous image requests get the url immediately.
            this.url = this.layer.getURL(this.bounds);
            this.initImage();
        }
    },

    /**
     * Method: positionTile
     * Using the properties currenty set on the layer, position the tile correctly.
     * This method is used both by the async and non-async versions of the Tile.Image
     * code.
     */
    positionTile: function() {
        var style = this.getTile().style,
            size = this.frame ? this.size :
                                this.layer.getImageSize(this.bounds);
        style.left = this.position.x + "%";
        style.top = this.position.y + "%";
        style.width = size.w + "%";
        style.height = size.h + "%";
    },

    /** 
     * Method: clear
     * Remove the tile from the DOM, clear it of any image related data so that
     * it can be reused in a new location.
     */
    clear: function() {
        OpenLayers.Tile.prototype.clear.apply(this, arguments);
        var img = this.imgDiv;
        if (img) {
            OpenLayers.Event.stopObservingElement(img);
            var tile = this.getTile();
            if (tile.parentNode === this.layer.div) {
                this.layer.div.removeChild(tile);
            }
            this.setImgSrc();
            if (this.layerAlphaHack === true) {
                img.style.filter = "";
            }
            OpenLayers.Element.removeClass(img, "olImageLoadError");
        }
        this.canvasContext = null;
    },
    
    /**
     * Method: getImage
     * Returns or creates and returns the tile image.
     */
    getImage: function() {
        if (!this.imgDiv) {
            this.imgDiv = document.createElement("img");

            this.imgDiv.className = "olTileImage";
            // avoid image gallery menu in IE6
            this.imgDiv.galleryImg = "no";

            var style = this.imgDiv.style;
            if (this.frame) {
                var left = 0, top = 0;
                if (this.layer.gutter) {
                    left = this.layer.gutter / this.layer.tileSize.w * 100;
                    top = this.layer.gutter / this.layer.tileSize.h * 100;
                }
                style.left = -left + "%";
                style.top = -top + "%";
                style.width = (2 * left + 100) + "%";
                style.height = (2 * top + 100) + "%";
            }
            style.visibility = "hidden";
            style.opacity = 0;
            if (this.layer.opacity < 1) {
                style.filter = 'alpha(opacity=' +
                               (this.layer.opacity * 100) +
                               ')';
            }
            style.position = "absolute";
            if (this.layerAlphaHack) {
                // move the image out of sight
                style.paddingTop = style.height;
                style.height = "0";
                style.width = "100%";
            }
            if (this.frame) {
                this.frame.appendChild(this.imgDiv);
            }
        }

        return this.imgDiv;
    },

    /**
     * Method: initImage
     * Creates the content for the frame on the tile.
     */
    initImage: function() {
        this.events.triggerEvent(this._loadEvent);
        var img = this.getImage();
        if (this.url && img.getAttribute("src") == this.url) {
            this.onImageLoad();
        } else {
            // We need to start with a blank image, to make sure that no
            // loading image placeholder and no old image is displayed when we
            // set the display style to "" in onImageLoad, which is called
            // after the image is loaded, but before it is rendered. So we set
            // a blank image with a data scheme URI, and register for the load
            // event (for browsers that support data scheme) and the error
            // event (for browsers that don't). In the event handler, we set
            // the final src.
            var load = OpenLayers.Function.bind(function() {
                OpenLayers.Event.stopObservingElement(img);
                OpenLayers.Event.observe(img, "load",
                    OpenLayers.Function.bind(this.onImageLoad, this)
                );
                OpenLayers.Event.observe(img, "error",
                    OpenLayers.Function.bind(this.onImageError, this)
                );
                this.imageReloadAttempts = 0;
                this.setImgSrc(this.url);
            }, this);
            if (img.getAttribute("src") == this.blankImageUrl) {
                load();
            } else {
                OpenLayers.Event.observe(img, "load", load);
                OpenLayers.Event.observe(img, "error", load);
                if (this.crossOriginKeyword) {
                    img.removeAttribute("crossorigin");
                }
                img.src = this.blankImageUrl;
            }
        }
    },
    
    /**
     * Method: setImgSrc
     * Sets the source for the tile image
     *
     * Parameters:
     * url - {String} or undefined to hide the image
     */
    setImgSrc: function(url) {
        var img = this.imgDiv;
        img.style.visibility = 'hidden';
        img.style.opacity = 0;
        if (url) {
            // don't set crossOrigin if the url is a data URL
            if (this.crossOriginKeyword) {
                if (url.substr(0, 5) !== 'data:') {
                    img.setAttribute("crossorigin", this.crossOriginKeyword);
                } else {
                    img.removeAttribute("crossorigin");
                }
            }
            img.src = url;
        }
    },
    
    /**
     * Method: getTile
     * Get the tile's markup.
     *
     * Returns:
     * {DOMElement} The tile's markup
     */
    getTile: function() {
        return this.frame ? this.frame : this.getImage();
    },

    /**
     * Method: createBackBuffer
     * Create a backbuffer for this tile. A backbuffer isn't exactly a clone
     * of the tile's markup, because we want to avoid the reloading of the
     * image. So we clone the frame, and steal the image from the tile.
     *
     * Returns:
     * {DOMElement} The markup, or undefined if the tile has no image
     * or if it's currently loading.
     */
    createBackBuffer: function() {
        if (!this.imgDiv || this.isLoading) {
            return;
        }
        var backBuffer;
        if (this.frame) {
            backBuffer = this.frame.cloneNode(false);
            backBuffer.appendChild(this.imgDiv);
        } else {
            backBuffer = this.imgDiv;
        }
        this.imgDiv = null;
        return backBuffer;
    },

    /**
     * Method: onImageLoad
     * Handler for the image onload event
     */
    onImageLoad: function() {
        var img = this.imgDiv;
        OpenLayers.Event.stopObservingElement(img);

        img.style.visibility = 'inherit';
        img.style.opacity = this.layer.opacity;

        this.isLoading = false;
        this.canvasContext = null;
        this.events.triggerEvent("loadend");

        // IE<7 needs a reflow when the tiles are loaded because of the
        // percentage based positioning. Otherwise nothing is shown
        // until the user interacts with the map in some way.
        if (parseFloat(navigator.appVersion.split("MSIE")[1]) < 7 &&
                this.layer && this.layer.div) {
            var span = document.createElement("span");
            span.style.display = "none";
            var layerDiv = this.layer.div;
            layerDiv.appendChild(span);
            window.setTimeout(function() {
                span.parentNode === layerDiv && span.parentNode.removeChild(span);
            }, 0);
        }

        if (this.layerAlphaHack === true) {
            img.style.filter =
                "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" +
                img.src + "', sizingMethod='scale')";
        }
    },
    
    /**
     * Method: onImageError
     * Handler for the image onerror event
     */
    onImageError: function() {
        var img = this.imgDiv;
        if (img.src != null) {
            this.imageReloadAttempts++;
            if (this.imageReloadAttempts <= OpenLayers.IMAGE_RELOAD_ATTEMPTS) {
                this.setImgSrc(this.layer.getURL(this.bounds));
            } else {
                OpenLayers.Element.addClass(img, "olImageLoadError");
                this.events.triggerEvent("loaderror");
                this.onImageLoad();
            }
        }
    },

    /**
     * APIMethod: getCanvasContext
     * Returns a canvas context associated with the tile image (with
     * the image drawn on it).
     * Returns undefined if the browser does not support canvas, if
     * the tile has no image or if it's currently loading.
     *
     * The function returns a canvas context instance but the
     * underlying canvas is still available in the 'canvas' property:
     * (code)
     * var context = tile.getCanvasContext();
     * if (context) {
     *     var data = context.canvas.toDataURL('image/jpeg');
     * }
     * (end)
     *
     * Returns:
     * {Boolean}
     */
    getCanvasContext: function() {
        if (OpenLayers.CANVAS_SUPPORTED && this.imgDiv && !this.isLoading) {
            if (!this.canvasContext) {
                var canvas = document.createElement("canvas");
                canvas.width = this.size.w;
                canvas.height = this.size.h;
                this.canvasContext = canvas.getContext("2d");
                this.canvasContext.drawImage(this.imgDiv, 0, 0);
            }
            return this.canvasContext;
        }
    },

    CLASS_NAME: "OpenLayers.Tile.Image"

});
/* ======================================================================
    OpenLayers/Layer/Grid.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/HTTPRequest.js
 * @requires OpenLayers/Tile/Image.js
 */

/**
 * Class: OpenLayers.Layer.Grid
 * Base class for layers that use a lattice of tiles.  Create a new grid
 * layer with the <OpenLayers.Layer.Grid> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Layer.HTTPRequest>
 */
OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
    
    /**
     * APIProperty: tileSize
     * {<OpenLayers.Size>}
     */
    tileSize: null,

    /**
     * Property: tileOriginCorner
     * {String} If the <tileOrigin> property is not provided, the tile origin 
     *     will be derived from the layer's <maxExtent>.  The corner of the 
     *     <maxExtent> used is determined by this property.  Acceptable values
     *     are "tl" (top left), "tr" (top right), "bl" (bottom left), and "br"
     *     (bottom right).  Default is "bl".
     */
    tileOriginCorner: "bl",
    
    /**
     * APIProperty: tileOrigin
     * {<OpenLayers.LonLat>} Optional origin for aligning the grid of tiles.
     *     If provided, requests for tiles at all resolutions will be aligned
     *     with this location (no tiles shall overlap this location).  If
     *     not provided, the grid of tiles will be aligned with the layer's
     *     <maxExtent>.  Default is ``null``.
     */
    tileOrigin: null,
    
    /** APIProperty: tileOptions
     *  {Object} optional configuration options for <OpenLayers.Tile> instances
     *  created by this Layer, if supported by the tile class.
     */
    tileOptions: null,

    /**
     * APIProperty: tileClass
     * {<OpenLayers.Tile>} The tile class to use for this layer.
     *     Defaults is OpenLayers.Tile.Image.
     */
    tileClass: OpenLayers.Tile.Image,
    
    /**
     * Property: grid
     * {Array(Array(<OpenLayers.Tile>))} This is an array of rows, each row is 
     *     an array of tiles.
     */
    grid: null,

    /**
     * APIProperty: singleTile
     * {Boolean} Moves the layer into single-tile mode, meaning that one tile 
     *     will be loaded. The tile's size will be determined by the 'ratio'
     *     property. When the tile is dragged such that it does not cover the 
     *     entire viewport, it is reloaded.
     */
    singleTile: false,

    /** APIProperty: ratio
     *  {Float} Used only when in single-tile mode, this specifies the 
     *          ratio of the size of the single tile to the size of the map.
     */
    ratio: 1.5,

    /**
     * APIProperty: buffer
     * {Integer} Used only when in gridded mode, this specifies the number of 
     *           extra rows and colums of tiles on each side which will
     *           surround the minimum grid tiles to cover the map.
     *           For very slow loading layers, a larger value may increase
     *           performance somewhat when dragging, but will increase bandwidth
     *           use significantly. 
     */
    buffer: 0,

    /**
     * APIProperty: transitionEffect
     * {String} The transition effect to use when the map is zoomed.
     * Two posible values:
     *
     * null - No transition effect (the default).
     * "resize" - Existing tiles are resized on zoom to provide a visual
     * effect of the zoom having taken place immediately.  As the
     * new tiles become available, they are drawn over top of the
     * resized tiles.
     *
     * Using "resize" on non-opaque layers can cause undesired visual
     * effects. This is therefore discouraged.
     */
    transitionEffect: null,

    /**
     * APIProperty: numLoadingTiles
     * {Integer} How many tiles are still loading?
     */
    numLoadingTiles: 0,

    /**
     * APIProperty: tileLoadingDelay
     * {Integer} Number of milliseconds before we shift and load
     *     tiles when panning. Ignored if <OpenLayers.Animation.isNative> is
     *     true. Default is 85.
     */
    tileLoadingDelay: 85,
    
    /**
     * Property: serverResolutions
     * {Array(Number}} This property is documented in subclasses as
     *     an API property.
     */
    serverResolutions: null,

    /**
     * Property: moveTimerId
     * {Number} The id of the <deferMoveGriddedTiles> timer.
     */
    moveTimerId: null,
    
    /**
     * Property: deferMoveGriddedTiles
     * {Function} A function that defers execution of <moveGriddedTiles> by
     *     <tileLoadingDelay>. If <OpenLayers.Animation.isNative> is true, this
     *     is null and unused.
     */
    deferMoveGriddedTiles: null,

    /**
     * Property: tileQueueId
     * {Number} The id of the <drawTileFromQueue> animation.
     */
    tileQueueId: null,

    /**
     * Property: tileQueue
     * {Array(<OpenLayers.Tile>)} Tiles queued for drawing.
     */
    tileQueue: null,
    
    /**
     * Property: loading
     * {Boolean} Indicates if tiles are being loaded.
     */
    loading: false,
    
    /**
     * Property: backBuffer
     * {DOMElement} The back buffer.
     */
    backBuffer: null,

    /**
     * Property: gridResolution
     * {Number} The resolution of the current grid. Used for backbuffering.
     *     This property is updated each the grid is initialized.
     */
    gridResolution: null,

    /**
     * Property: backBufferResolution
     * {Number} The resolution of the current back buffer. This property is
     *     updated each time a back buffer is created.
     */
    backBufferResolution: null,

    /**
     * Property: backBufferLonLat
     * {Object} The top-left corner of the current back buffer. Includes lon
     *     and lat properties. This object is updated each time a back buffer
     *     is created.
     */
    backBufferLonLat: null,

    /**
     * Property: backBufferTimerId
     * {Number} The id of the back buffer timer. This timer is used to
     *     delay the removal of the back buffer, thereby preventing
     *     flash effects caused by tile animation.
     */
    backBufferTimerId: null,

    /**
     * APIProperty: removeBackBufferDelay
     * {Number} Delay for removing the backbuffer when all tiles have finished
     *     loading. Can be set to 0 when no css opacity transitions for the
     *     olTileImage class are used. Default is 0 for <singleTile> layers,
     *     2500 for tiled layers. See <className> for more information on
     *     tile animation.
     */
    removeBackBufferDelay: null,

    /**
     * APIProperty: className
     * {String} Name of the class added to the layer div. If not set in the
     *     options passed to the constructor then className defaults to
     *     "olLayerGridSingleTile" for single tile layers (see <singleTile>),
     *     and "olLayerGrid" for non single tile layers.
     *
     * Note:
     *
     * The displaying of tiles is not animated by default for single tile
     *     layers - OpenLayers' default theme (style.css) includes this:
     * (code)
     * .olLayerGrid .olTileImage {
     *     -webkit-transition: opacity 0.2s linear;
     *     -moz-transition: opacity 0.2s linear;
     *     -o-transition: opacity 0.2s linear;
     *     transition: opacity 0.2s linear;
     *  }
     * (end)
     * To animate tile displaying for any grid layer the following
     *     CSS rule can be used:
     * (code)
     * .olTileImage {
     *     -webkit-transition: opacity 0.2s linear;
     *     -moz-transition: opacity 0.2s linear;
     *     -o-transition: opacity 0.2s linear;
     *     transition: opacity 0.2s linear;
     * }
     * (end)
     * In that case, to avoid flash effects, <removeBackBufferDelay>
     *     should not be zero.
     */
    className: null,

    /**
     * Register a listener for a particular event with the following syntax:
     * (code)
     * layer.events.register(type, obj, listener);
     * (end)
     *
     * Listeners will be called with a reference to an event object.  The
     *     properties of this event depends on exactly what happened.
     *
     * All event objects have at least the following properties:
     * object - {Object} A reference to layer.events.object.
     * element - {DOMElement} A reference to layer.events.element.
     *
     * Supported event types:
     * tileloadstart - Triggered when a tile starts loading. Listeners receive
     *     an object as first argument, which has a tile property that
     *     references the tile that starts loading.
     * tileloaded - Triggered when each new tile is
     *     loaded, as a means of progress update to listeners.
     *     listeners can access 'numLoadingTiles' if they wish to keep
     *     track of the loading progress. Listeners are called with an object
     *     with a tile property as first argument, making the loded tile
     *     available to the listener.
     * tileerror - Triggered before the tileloaded event (i.e. when the tile is
     *     still hidden) if a tile failed to load. Listeners receive an object
     *     as first argument, which has a tile property that references the
     *     tile that could not be loaded.
     */

    /**
     * Constructor: OpenLayers.Layer.Grid
     * Create a new grid layer
     *
     * Parameters:
     * name - {String}
     * url - {String}
     * params - {Object}
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, url, params, options) {
        OpenLayers.Layer.HTTPRequest.prototype.initialize.apply(this, 
                                                                arguments);
        this.grid = [];
        this.tileQueue = [];

        if (this.removeBackBufferDelay === null) {
            this.removeBackBufferDelay = this.singleTile ? 0 : 2500;
        }
        
        if (this.className === null) {
            this.className = this.singleTile ? 'olLayerGridSingleTile' :
                                               'olLayerGrid';
        }

        if (!OpenLayers.Animation.isNative) {
            this.deferMoveGriddedTiles = OpenLayers.Function.bind(function() {
                this.moveGriddedTiles(true);
                this.moveTimerId = null;
            }, this);
        }
    },

    /**
     * Method: setMap
     *
     * Parameters:
     * map - {<OpenLayers.Map>} The map.
     */
    setMap: function(map) {
        OpenLayers.Layer.HTTPRequest.prototype.setMap.call(this, map);
        OpenLayers.Element.addClass(this.div, this.className);
    },

    /**
     * Method: removeMap
     * Called when the layer is removed from the map.
     *
     * Parameters:
     * map - {<OpenLayers.Map>} The map.
     */
    removeMap: function(map) {
        if (this.moveTimerId !== null) {
            window.clearTimeout(this.moveTimerId);
            this.moveTimerId = null;
        }
        this.clearTileQueue();
        if(this.backBufferTimerId !== null) {
            window.clearTimeout(this.backBufferTimerId);
            this.backBufferTimerId = null;
        }
    },

    /**
     * APIMethod: destroy
     * Deconstruct the layer and clear the grid.
     */
    destroy: function() {
        this.removeBackBuffer();
        this.clearGrid();

        this.grid = null;
        this.tileSize = null;
        OpenLayers.Layer.HTTPRequest.prototype.destroy.apply(this, arguments); 
    },

    /**
     * Method: clearGrid
     * Go through and remove all tiles from the grid, calling
     *    destroy() on each of them to kill circular references
     */
    clearGrid:function() {
        this.clearTileQueue();
        if (this.grid) {
            for(var iRow=0, len=this.grid.length; iRow<len; iRow++) {
                var row = this.grid[iRow];
                for(var iCol=0, clen=row.length; iCol<clen; iCol++) {
                    var tile = row[iCol];
                    this.destroyTile(tile);
                }
            }
            this.grid = [];
            this.gridResolution = null;
        }
    },
    
    /**
     * APIMethod: clone
     * Create a clone of this layer
     *
     * Parameters:
     * obj - {Object} Is this ever used?
     * 
     * Returns:
     * {<OpenLayers.Layer.Grid>} An exact clone of this OpenLayers.Layer.Grid
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.Grid(this.name,
                                            this.url,
                                            this.params,
                                            this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.HTTPRequest.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here
        if (this.tileSize != null) {
            obj.tileSize = this.tileSize.clone();
        }
        
        // we do not want to copy reference to grid, so we make a new array
        obj.grid = [];
        obj.gridResolution = null;
        // same for backbuffer and tile queue
        obj.backBuffer = null;
        obj.backBufferTimerId = null;
        obj.tileQueue = [];
        obj.tileQueueId = null;
        obj.loading = false;
        obj.moveTimerId = null;

        return obj;
    },    

    /**
     * Method: moveTo
     * This function is called whenever the map is moved. All the moving
     * of actual 'tiles' is done by the map, but moveTo's role is to accept
     * a bounds and make sure the data that that bounds requires is pre-loaded.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * zoomChanged - {Boolean}
     * dragging - {Boolean}
     */
    moveTo:function(bounds, zoomChanged, dragging) {

        OpenLayers.Layer.HTTPRequest.prototype.moveTo.apply(this, arguments);

        bounds = bounds || this.map.getExtent();

        if (bounds != null) {
             
            // if grid is empty or zoom has changed, we *must* re-tile
            var forceReTile = !this.grid.length || zoomChanged;
            
            // total bounds of the tiles
            var tilesBounds = this.getTilesBounds();            

            // the new map resolution
            var resolution = this.map.getResolution();

            // the server-supported resolution for the new map resolution
            var serverResolution = this.getServerResolution(resolution);

            if (this.singleTile) {
                
                // We want to redraw whenever even the slightest part of the 
                //  current bounds is not contained by our tile.
                //  (thus, we do not specify partial -- its default is false)

                if ( forceReTile ||
                     (!dragging && !tilesBounds.containsBounds(bounds))) {

                    // In single tile mode with no transition effect, we insert
                    // a non-scaled backbuffer when the layer is moved. But if
                    // a zoom occurs right after a move, i.e. before the new
                    // image is received, we need to remove the backbuffer, or
                    // an ill-positioned image will be visible during the zoom
                    // transition.

                    if(zoomChanged && this.transitionEffect !== 'resize') {
                        this.removeBackBuffer();
                    }

                    if(!zoomChanged || this.transitionEffect === 'resize') {
                        this.applyBackBuffer(serverResolution);
                    }

                    this.initSingleTile(bounds);
                }
            } else {

                // if the bounds have changed such that they are not even 
                // *partially* contained by our tiles (e.g. when user has 
                // programmatically panned to the other side of the earth on
                // zoom level 18), then moveGriddedTiles could potentially have
                // to run through thousands of cycles, so we want to reTile
                // instead (thus, partial true).  
                forceReTile = forceReTile ||
                    !tilesBounds.intersectsBounds(bounds, {
                        worldBounds: this.map.baseLayer.wrapDateLine &&
                            this.map.getMaxExtent()
                    });

                if(resolution !== serverResolution) {
                    bounds = this.map.calculateBounds(null, serverResolution);
                    if(forceReTile) {
                        // stretch the layer div
                        var scale = serverResolution / resolution;
                        this.transformDiv(scale);
                    }
                } else {
                    // reset the layer width, height, left, top, to deal with
                    // the case where the layer was previously transformed
                    this.div.style.width = '100%';
                    this.div.style.height = '100%';
                    this.div.style.left = '0%';
                    this.div.style.top = '0%';
                }

                if(forceReTile) {
                    if(zoomChanged && this.transitionEffect === 'resize') {
                        this.applyBackBuffer(serverResolution);
                    }
                    this.initGriddedTiles(bounds);
                } else {
                    this.moveGriddedTiles();
                }
            }
        }
    },

    /**
     * Method: getTileData
     * Given a map location, retrieve a tile and the pixel offset within that
     *     tile corresponding to the location.  If there is not an existing 
     *     tile in the grid that covers the given location, null will be 
     *     returned.
     *
     * Parameters:
     * loc - {<OpenLayers.LonLat>} map location
     *
     * Returns:
     * {Object} Object with the following properties: tile ({<OpenLayers.Tile>}),
     *     i ({Number} x-pixel offset from top left), and j ({Integer} y-pixel
     *     offset from top left).
     */
    getTileData: function(loc) {
        var data = null,
            x = loc.lon,
            y = loc.lat,
            numRows = this.grid.length;

        if (this.map && numRows) {
            var res = this.map.getResolution(),
                tileWidth = this.tileSize.w,
                tileHeight = this.tileSize.h,
                bounds = this.grid[0][0].bounds,
                left = bounds.left,
                top = bounds.top;

            if (x < left) {
                // deal with multiple worlds
                if (this.map.baseLayer.wrapDateLine) {
                    var worldWidth = this.map.getMaxExtent().getWidth();
                    var worldsAway = Math.ceil((left - x) / worldWidth);
                    x += worldWidth * worldsAway;
                }
            }
            // tile distance to location (fractional number of tiles);
            var dtx = (x - left) / (res * tileWidth);
            var dty = (top - y) / (res * tileHeight);
            // index of tile in grid
            var col = Math.floor(dtx);
            var row = Math.floor(dty);
            if (row >= 0 && row < numRows) {
                var tile = this.grid[row][col];
                if (tile) {
                    data = {
                        tile: tile,
                        // pixel index within tile
                        i: Math.floor((dtx - col) * tileWidth),
                        j: Math.floor((dty - row) * tileHeight)
                    };                    
                }
            }
        }
        return data;
    },
    
    /**
     * Method: queueTileDraw
     * Adds a tile to the animation queue that will draw it.
     *
     * Parameters:
     * evt - {Object} Listener argument of the tile's beforedraw event
     */
    queueTileDraw: function(evt) {
        var tile = evt.object;
        if (!~OpenLayers.Util.indexOf(this.tileQueue, tile)) {
            // queue only if not in queue already
            this.tileQueue.push(tile);
        }
        if (!this.tileQueueId) {
            this.tileQueueId = OpenLayers.Animation.start(
                OpenLayers.Function.bind(this.drawTileFromQueue, this),
                null, this.div
            );
        }
        return false;
    },
    
    /**
     * Method: drawTileFromQueue
     * Draws the first tile from the tileQueue, and unqueues that tile
     */
    drawTileFromQueue: function() {
        if (this.tileQueue.length === 0) {
            this.clearTileQueue();
        } else {
            this.tileQueue.shift().draw(true);
        }
    },
    
    /**
     * Method: clearTileQueue
     * Clears the animation queue
     */
    clearTileQueue: function() {
        OpenLayers.Animation.stop(this.tileQueueId);
        this.tileQueueId = null;
        this.tileQueue = [];
    },

    /**
     * Method: destroyTile
     *
     * Parameters:
     * tile - {<OpenLayers.Tile>}
     */
    destroyTile: function(tile) {
        this.removeTileMonitoringHooks(tile);
        tile.destroy();
    },

    /**
     * Method: getServerResolution
     * Return the closest highest server-supported resolution. Throw an
     * exception if none is found in the serverResolutions array.
     *
     * Parameters:
     * resolution - {Number} The base resolution. If undefined the
     *     map resolution is used.
     *
     * Returns:
     * {Number} The closest highest server resolution value.
     */
    getServerResolution: function(resolution) {
        resolution = resolution || this.map.getResolution();
        if(this.serverResolutions &&
           OpenLayers.Util.indexOf(this.serverResolutions, resolution) === -1) {
            var i, serverResolution;
            for(i=this.serverResolutions.length-1; i>= 0; i--) {
                serverResolution = this.serverResolutions[i];
                if(serverResolution > resolution) {
                    resolution = serverResolution;
                    break;
                }
            }
            if(i === -1) {
                throw 'no appropriate resolution in serverResolutions';
            }
        }
        return resolution;
    },

    /**
     * Method: getServerZoom
     * Return the zoom value corresponding to the best matching server
     * resolution, taking into account <serverResolutions> and <zoomOffset>.
     *
     * Returns:
     * {Number} The closest server supported zoom. This is not the map zoom
     *     level, but an index of the server's resolutions array.
     */
    getServerZoom: function() {
        var resolution = this.getServerResolution();
        return this.serverResolutions ?
            OpenLayers.Util.indexOf(this.serverResolutions, resolution) :
            this.map.getZoomForResolution(resolution) + (this.zoomOffset || 0);
    },

    /**
     * Method: transformDiv
     * Transform the layer div.
     *
     * Parameters:
     * scale - {Number} The value by which the layer div is to
     *     be scaled.
     */
    transformDiv: function(scale) {

        // scale the layer div

        this.div.style.width = 100 * scale + '%';
        this.div.style.height = 100 * scale + '%';

        // and translate the layer div as necessary

        var size = this.map.getSize();
        var lcX = parseInt(this.map.layerContainerDiv.style.left, 10);
        var lcY = parseInt(this.map.layerContainerDiv.style.top, 10);
        var x = (lcX - (size.w / 2.0)) * (scale - 1);
        var y = (lcY - (size.h / 2.0)) * (scale - 1);

        this.div.style.left = x + '%';
        this.div.style.top = y + '%';
    },

    /**
     * Method: getResolutionScale
     * Return the value by which the layer is currently scaled.
     *
     * Returns:
     * {Number} The resolution scale.
     */
    getResolutionScale: function() {
        return parseInt(this.div.style.width, 10) / 100;
    },

    /**
     * Method: applyBackBuffer
     * Create, insert, scale and position a back buffer for the layer.
     *
     * Parameters:
     * resolution - {Number} The resolution to transition to.
     */
    applyBackBuffer: function(resolution) {
        if(this.backBufferTimerId !== null) {
            this.removeBackBuffer();
        }
        var backBuffer = this.backBuffer;
        if(!backBuffer) {
            backBuffer = this.createBackBuffer();
            if(!backBuffer) {
                return;
            }
            this.div.insertBefore(backBuffer, this.div.firstChild);
            this.backBuffer = backBuffer;

            // set some information in the instance for subsequent
            // calls to applyBackBuffer where the same back buffer
            // is reused
            var topLeftTileBounds = this.grid[0][0].bounds;
            this.backBufferLonLat = {
                lon: topLeftTileBounds.left,
                lat: topLeftTileBounds.top
            };
            this.backBufferResolution = this.gridResolution;
        }

        var style = backBuffer.style;

        // scale the back buffer
        var ratio = this.backBufferResolution / resolution;
        style.width = 100 * ratio + '%';
        style.height = 100 * ratio + '%';

        // and position it (based on the grid's top-left corner)
        var position = this.getViewPortPxFromLonLat(
                this.backBufferLonLat, resolution);
        var leftOffset = parseInt(this.map.layerContainerDiv.style.left, 10);
        var topOffset = parseInt(this.map.layerContainerDiv.style.top, 10);
        backBuffer.style.left = Math.round(position.x - leftOffset) + '%';
        backBuffer.style.top = Math.round(position.y - topOffset) + '%';
    },

    /**
     * Method: createBackBuffer
     * Create a back buffer.
     *
     * Returns:
     * {DOMElement} The DOM element for the back buffer, undefined if the
     * grid isn't initialized yet.
     */
    createBackBuffer: function() {
        var backBuffer;
        if(this.grid.length > 0) {
            backBuffer = document.createElement('div');
            backBuffer.id = this.div.id + '_bb';
            backBuffer.className = 'olBackBuffer';
            backBuffer.style.position = 'absolute';
            backBuffer.style.width = '100%';
            backBuffer.style.height = '100%';
            for(var i=0, lenI=this.grid.length; i<lenI; i++) {
                for(var j=0, lenJ=this.grid[i].length; j<lenJ; j++) {
                    var tile = this.grid[i][j].createBackBuffer();
                    if(!tile) {
                        continue;
                    }
                    // to be able to correctly position the back buffer we
                    // place the tiles grid at (0, 0) in the back buffer
                    tile.style.top = (i * this.tileSize.h) + '%';
                    tile.style.left = (j * this.tileSize.w) + '%';
                    backBuffer.appendChild(tile);
                }
            }
        }
        return backBuffer;
    },

    /**
     * Method: removeBackBuffer
     * Remove back buffer from DOM.
     */
    removeBackBuffer: function() {
        if(this.backBuffer) {
            this.div.removeChild(this.backBuffer);
            this.backBuffer = null;
            this.backBufferResolution = null;
            if(this.backBufferTimerId !== null) {
                window.clearTimeout(this.backBufferTimerId);
                this.backBufferTimerId = null;
            }
        }
    },

    /**
     * Method: moveByPx
     * Move the layer based on pixel vector.
     *
     * Parameters:
     * dx - {Number}
     * dy - {Number}
     */
    moveByPx: function(dx, dy) {
        if (!this.singleTile) {
            this.moveGriddedTiles();
        }
    },

    /**
     * APIMethod: setTileSize
     * Check if we are in singleTile mode and if so, set the size as a ratio
     *     of the map size (as specified by the layer's 'ratio' property).
     * 
     * Parameters:
     * size - {<OpenLayers.Size>}
     */
    setTileSize: function(size) { 
        if (this.singleTile) {
            size = this.map.getSize();
            size.h = parseInt(size.h * this.ratio);
            size.w = parseInt(size.w * this.ratio);
        } 
        OpenLayers.Layer.HTTPRequest.prototype.setTileSize.apply(this, [size]);
    },

    /**
     * APIMethod: getTilesBounds
     * Return the bounds of the tile grid.
     *
     * Returns:
     * {<OpenLayers.Bounds>} A Bounds object representing the bounds of all the
     *     currently loaded tiles (including those partially or not at all seen 
     *     onscreen).
     */
    getTilesBounds: function() {    
        var bounds = null; 
        
        var length = this.grid.length;
        if (length) {
            var bottomLeftTileBounds = this.grid[length - 1][0].bounds,
                width = this.grid[0].length * bottomLeftTileBounds.getWidth(),
                height = this.grid.length * bottomLeftTileBounds.getHeight();
            
            bounds = new OpenLayers.Bounds(bottomLeftTileBounds.left, 
                                           bottomLeftTileBounds.bottom,
                                           bottomLeftTileBounds.left + width, 
                                           bottomLeftTileBounds.bottom + height);
        }   
        return bounds;
    },

    /**
     * Method: initSingleTile
     * 
     * Parameters: 
     * bounds - {<OpenLayers.Bounds>}
     */
    initSingleTile: function(bounds) {
        this.clearTileQueue();

        //determine new tile bounds
        var center = bounds.getCenterLonLat();
        var tileWidth = bounds.getWidth() * this.ratio;
        var tileHeight = bounds.getHeight() * this.ratio;
                                       
        var tileBounds = 
            new OpenLayers.Bounds(center.lon - (tileWidth/2),
                                  center.lat - (tileHeight/2),
                                  center.lon + (tileWidth/2),
                                  center.lat + (tileHeight/2));
  
        var px = this.map.getLayerPxFromLonLat({
            lon: tileBounds.left,
            lat: tileBounds.top
        });

        if (!this.grid.length) {
            this.grid[0] = [];
        }

        var tile = this.grid[0][0];
        if (!tile) {
            tile = this.addTile(tileBounds, px);
            
            this.addTileMonitoringHooks(tile);
            tile.draw();
            this.grid[0][0] = tile;
        } else {
            tile.moveTo(tileBounds, px);
        }           
        
        //remove all but our single tile
        this.removeExcessTiles(1,1);

        // store the resolution of the grid
        this.gridResolution = this.getServerResolution();
    },

    /** 
     * Method: calculateGridLayout
     * Generate parameters for the grid layout.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bound>|Object} OpenLayers.Bounds or an
     *     object with a 'left' and 'top' properties.
     * origin - {<OpenLayers.LonLat>|Object} OpenLayers.LonLat or an
     *     object with a 'lon' and 'lat' properties.
     * resolution - {Number}
     *
     * Returns:
     * {Object} containing properties tilelon, tilelat, tileoffsetlat,
     * tileoffsetlat, tileoffsetx, tileoffsety
     */
    calculateGridLayout: function(bounds, origin, resolution) {
        var tilelon = resolution * this.tileSize.w;
        var tilelat = resolution * this.tileSize.h;
        
        var offsetlon = bounds.left - origin.lon;
        var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
        var tilecolremain = offsetlon/tilelon - tilecol;
        var tileoffsetx = -tilecolremain * this.tileSize.w;
        var tileoffsetlon = origin.lon + tilecol * tilelon;
        
        var offsetlat = bounds.top - (origin.lat + tilelat);  
        var tilerow = Math.ceil(offsetlat/tilelat) + this.buffer;
        var tilerowremain = tilerow - offsetlat/tilelat;
        var tileoffsety = -tilerowremain * this.tileSize.h;
        var tileoffsetlat = origin.lat + tilerow * tilelat;
        
        return { 
          tilelon: tilelon, tilelat: tilelat,
          tileoffsetlon: tileoffsetlon, tileoffsetlat: tileoffsetlat,
          tileoffsetx: tileoffsetx, tileoffsety: tileoffsety
        };

    },
    
    /**
     * Method: getTileOrigin
     * Determine the origin for aligning the grid of tiles.  If a <tileOrigin>
     *     property is supplied, that will be returned.  Otherwise, the origin
     *     will be derived from the layer's <maxExtent> property.  In this case,
     *     the tile origin will be the corner of the <maxExtent> given by the 
     *     <tileOriginCorner> property.
     *
     * Returns:
     * {<OpenLayers.LonLat>} The tile origin.
     */
    getTileOrigin: function() {
        var origin = this.tileOrigin;
        if (!origin) {
            var extent = this.getMaxExtent();
            var edges = ({
                "tl": ["left", "top"],
                "tr": ["right", "top"],
                "bl": ["left", "bottom"],
                "br": ["right", "bottom"]
            })[this.tileOriginCorner];
            origin = new OpenLayers.LonLat(extent[edges[0]], extent[edges[1]]);
        }
        return origin;
    },

    /**
     * Method: initGriddedTiles
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     */
    initGriddedTiles:function(bounds) {
        this.clearTileQueue();

        // work out mininum number of rows and columns; this is the number of
        // tiles required to cover the viewport plus at least one for panning

        var viewSize = this.map.getSize();
        var minRows = Math.ceil(viewSize.h/this.tileSize.h) + 
                      Math.max(1, 2 * this.buffer);
        var minCols = Math.ceil(viewSize.w/this.tileSize.w) +
                      Math.max(1, 2 * this.buffer);
        
        var origin = this.getTileOrigin();
        var resolution = this.getServerResolution();
        
        var tileLayout = this.calculateGridLayout(bounds, origin, resolution);

        var tileoffsetx = Math.round(tileLayout.tileoffsetx); // heaven help us
        var tileoffsety = Math.round(tileLayout.tileoffsety);

        var tileoffsetlon = tileLayout.tileoffsetlon;
        var tileoffsetlat = tileLayout.tileoffsetlat;
        
        var tilelon = tileLayout.tilelon;
        var tilelat = tileLayout.tilelat;

        var startX = tileoffsetx; 
        var startLon = tileoffsetlon;

        var rowidx = 0;
        
        var layerContainerDivLeft = parseInt(this.map.layerContainerDiv.style.left);
        var layerContainerDivTop = parseInt(this.map.layerContainerDiv.style.top);

        var tileData = [], center = this.map.getCenter();
        do {
            var row = this.grid[rowidx++];
            if (!row) {
                row = [];
                this.grid.push(row);
            }

            tileoffsetlon = startLon;
            tileoffsetx = startX;
            var colidx = 0;
 
            do {
                var tileBounds = 
                    new OpenLayers.Bounds(tileoffsetlon, 
                                          tileoffsetlat, 
                                          tileoffsetlon + tilelon,
                                          tileoffsetlat + tilelat);

                var x = tileoffsetx;
                x -= layerContainerDivLeft;

                var y = tileoffsety;
                y -= layerContainerDivTop;

                var px = new OpenLayers.Pixel(x, y);
                var tile = row[colidx++];
                if (!tile) {
                    tile = this.addTile(tileBounds, px);
                    this.addTileMonitoringHooks(tile);
                    row.push(tile);
                } else {
                    tile.moveTo(tileBounds, px, false);
                }
                var tileCenter = tileBounds.getCenterLonLat();
                tileData.push({
                    tile: tile,
                    distance: Math.pow(tileCenter.lon - center.lon, 2) +
                        Math.pow(tileCenter.lat - center.lat, 2)
                });
     
                tileoffsetlon += tilelon;       
                tileoffsetx += this.tileSize.w;
            } while ((tileoffsetlon <= bounds.right + tilelon * this.buffer)
                     || colidx < minCols);
             
            tileoffsetlat -= tilelat;
            tileoffsety += this.tileSize.h;
        } while((tileoffsetlat >= bounds.bottom - tilelat * this.buffer)
                || rowidx < minRows);
        
        //shave off exceess rows and colums
        this.removeExcessTiles(rowidx, colidx);

        // store the resolution of the grid
        this.gridResolution = this.getServerResolution();

        //now actually draw the tiles
        tileData.sort(function(a, b) {
            return a.distance - b.distance; 
        });
        for (var i=0, ii=tileData.length; i<ii; ++i) {
            tileData[i].tile.draw();
        }
    },

    /**
     * Method: getMaxExtent
     * Get this layer's maximum extent. (Implemented as a getter for
     *     potential specific implementations in sub-classes.)
     *
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getMaxExtent: function() {
        return this.maxExtent;
    },
    
    /**
     * APIMethod: addTile
     * Create a tile, initialize it, and add it to the layer div. 
     *
     * Parameters
     * bounds - {<OpenLayers.Bounds>}
     * position - {<OpenLayers.Pixel>}
     *
     * Returns:
     * {<OpenLayers.Tile>} The added OpenLayers.Tile
     */
    addTile: function(bounds, position) {
        var tile = new this.tileClass(
            this, position, bounds, null, this.tileSize, this.tileOptions
        );
        tile.events.register("beforedraw", this, this.queueTileDraw);
        return tile;
    },
    
    /** 
     * Method: addTileMonitoringHooks
     * This function takes a tile as input and adds the appropriate hooks to 
     *     the tile so that the layer can keep track of the loading tiles.
     * 
     * Parameters: 
     * tile - {<OpenLayers.Tile>}
     */
    addTileMonitoringHooks: function(tile) {
        
        tile.onLoadStart = function() {
            //if that was first tile then trigger a 'loadstart' on the layer
            if (this.loading === false) {
                this.loading = true;
                this.events.triggerEvent("loadstart");
            }
            this.events.triggerEvent("tileloadstart", {tile: tile});
            this.numLoadingTiles++;
        };
      
        tile.onLoadEnd = function() {
            this.numLoadingTiles--;
            this.events.triggerEvent("tileloaded", {tile: tile});
            //if that was the last tile, then trigger a 'loadend' on the layer
            if (this.tileQueue.length === 0 && this.numLoadingTiles === 0) {
                this.loading = false;
                this.events.triggerEvent("loadend");
                if(this.backBuffer) {
                    // the removal of the back buffer is delayed to prevent flash
                    // effects due to the animation of tile displaying
                    this.backBufferTimerId = window.setTimeout(
                        OpenLayers.Function.bind(this.removeBackBuffer, this),
                        this.removeBackBufferDelay
                    );
                }
            }
        };
        
        tile.onLoadError = function() {
            this.events.triggerEvent("tileerror", {tile: tile});
        };
        
        tile.events.on({
            "loadstart": tile.onLoadStart,
            "loadend": tile.onLoadEnd,
            "unload": tile.onLoadEnd,
            "loaderror": tile.onLoadError,
            scope: this
        });
    },

    /** 
     * Method: removeTileMonitoringHooks
     * This function takes a tile as input and removes the tile hooks 
     *     that were added in addTileMonitoringHooks()
     * 
     * Parameters: 
     * tile - {<OpenLayers.Tile>}
     */
    removeTileMonitoringHooks: function(tile) {
        tile.unload();
        tile.events.un({
            "loadstart": tile.onLoadStart,
            "loadend": tile.onLoadEnd,
            "unload": tile.onLoadEnd,
            "loaderror": tile.onLoadError,
            scope: this
        });
    },
    
    /**
     * Method: moveGriddedTiles
     *
     * Parameter:
     * deferred - {Boolean} true if this is a deferred call that should not
     * be delayed.
     */
    moveGriddedTiles: function(deferred) {
        if (!deferred && !OpenLayers.Animation.isNative) {
            if (this.moveTimerId != null) {
                window.clearTimeout(this.moveTimerId);
            }
            this.moveTimerId = window.setTimeout(
                this.deferMoveGriddedTiles, this.tileLoadingDelay
            );
            return;
        }
        var buffer = this.buffer || 1;
        var scale = this.getResolutionScale();
        while(true) {
            var tlViewPort = {
                x: (this.grid[0][0].position.x * scale) +
                    parseInt(this.div.style.left, 10) +
                    parseInt(this.map.layerContainerDiv.style.left),
                y: (this.grid[0][0].position.y * scale) +
                    parseInt(this.div.style.top, 10) +
                    parseInt(this.map.layerContainerDiv.style.top)
            };
            var tileSize = {
                w: this.tileSize.w * scale,
                h: this.tileSize.h * scale
            };
            if (tlViewPort.x > -tileSize.w * (buffer - 1)) {
                this.shiftColumn(true);
            } else if (tlViewPort.x < -tileSize.w * buffer) {
                this.shiftColumn(false);
            } else if (tlViewPort.y > -tileSize.h * (buffer - 1)) {
                this.shiftRow(true);
            } else if (tlViewPort.y < -tileSize.h * buffer) {
                this.shiftRow(false);
            } else {
                break;
            }
        }
    },

    /**
     * Method: shiftRow
     * Shifty grid work
     *
     * Parameters:
     * prepend - {Boolean} if true, prepend to beginning.
     *                          if false, then append to end
     */
    shiftRow:function(prepend) {
        var modelRowIndex = (prepend) ? 0 : (this.grid.length - 1);
        var grid = this.grid;
        var modelRow = grid[modelRowIndex];

        var resolution = this.getServerResolution();
        var deltaY = (prepend) ? -this.tileSize.h : this.tileSize.h;
        var deltaLat = resolution * -deltaY;

        var row = (prepend) ? grid.pop() : grid.shift();

        for (var i=0, len=modelRow.length; i<len; i++) {
            var modelTile = modelRow[i];
            var bounds = modelTile.bounds.clone();
            var position = modelTile.position.clone();
            bounds.bottom = bounds.bottom + deltaLat;
            bounds.top = bounds.top + deltaLat;
            position.y = position.y + deltaY;
            row[i].moveTo(bounds, position);
        }

        if (prepend) {
            grid.unshift(row);
        } else {
            grid.push(row);
        }
    },

    /**
     * Method: shiftColumn
     * Shift grid work in the other dimension
     *
     * Parameters:
     * prepend - {Boolean} if true, prepend to beginning.
     *                          if false, then append to end
     */
    shiftColumn: function(prepend) {
        var deltaX = (prepend) ? -this.tileSize.w : this.tileSize.w;
        var resolution = this.getServerResolution();
        var deltaLon = resolution * deltaX;

        for (var i=0, len=this.grid.length; i<len; i++) {
            var row = this.grid[i];
            var modelTileIndex = (prepend) ? 0 : (row.length - 1);
            var modelTile = row[modelTileIndex];
            
            var bounds = modelTile.bounds.clone();
            var position = modelTile.position.clone();
            bounds.left = bounds.left + deltaLon;
            bounds.right = bounds.right + deltaLon;
            position.x = position.x + deltaX;

            var tile = prepend ? this.grid[i].pop() : this.grid[i].shift();
            tile.moveTo(bounds, position);
            if (prepend) {
                row.unshift(tile);
            } else {
                row.push(tile);
            }
        }
    },

    /**
     * Method: removeExcessTiles
     * When the size of the map or the buffer changes, we may need to
     *     remove some excess rows and columns.
     * 
     * Parameters:
     * rows - {Integer} Maximum number of rows we want our grid to have.
     * columns - {Integer} Maximum number of columns we want our grid to have.
     */
    removeExcessTiles: function(rows, columns) {
        var i, l;
        
        // remove extra rows
        while (this.grid.length > rows) {
            var row = this.grid.pop();
            for (i=0, l=row.length; i<l; i++) {
                var tile = row[i];
                this.destroyTile(tile);
            }
        }
        
        // remove extra columns
        for (i=0, l=this.grid.length; i<l; i++) {
            while (this.grid[i].length > columns) {
                var row = this.grid[i];
                var tile = row.pop();
                this.destroyTile(tile);
            }
        }
    },

    /**
     * Method: onMapResize
     * For singleTile layers, this will set a new tile size according to the
     * dimensions of the map pane.
     */
    onMapResize: function() {
        if (this.singleTile) {
            this.clearGrid();
            this.setTileSize();
        }
    },
    
    /**
     * APIMethod: getTileBounds
     * Returns The tile bounds for a layer given a pixel location.
     *
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>} The location in the viewport.
     *
     * Returns:
     * {<OpenLayers.Bounds>} Bounds of the tile at the given pixel location.
     */
    getTileBounds: function(viewPortPx) {
        var maxExtent = this.maxExtent;
        var resolution = this.getResolution();
        var tileMapWidth = resolution * this.tileSize.w;
        var tileMapHeight = resolution * this.tileSize.h;
        var mapPoint = this.getLonLatFromViewPortPx(viewPortPx);
        var tileLeft = maxExtent.left + (tileMapWidth *
                                         Math.floor((mapPoint.lon -
                                                     maxExtent.left) /
                                                    tileMapWidth));
        var tileBottom = maxExtent.bottom + (tileMapHeight *
                                             Math.floor((mapPoint.lat -
                                                         maxExtent.bottom) /
                                                        tileMapHeight));
        return new OpenLayers.Bounds(tileLeft, tileBottom,
                                     tileLeft + tileMapWidth,
                                     tileBottom + tileMapHeight);
    },

    CLASS_NAME: "OpenLayers.Layer.Grid"
});
/* ======================================================================
    OpenLayers/Format/ArcXML.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Geometry/Polygon.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/MultiPolygon.js
 * @requires OpenLayers/Geometry/LinearRing.js
 */

/**
 * Class: OpenLayers.Format.ArcXML
 * Read/Wite ArcXML. Create a new instance with the <OpenLayers.Format.ArcXML>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.ArcXML = OpenLayers.Class(OpenLayers.Format.XML, {

    /**
     * Property: fontStyleKeys
     * {Array} List of keys used in font styling.
     */
    fontStyleKeys: [
        'antialiasing', 'blockout', 'font', 'fontcolor','fontsize', 'fontstyle',
        'glowing', 'interval', 'outline', 'printmode', 'shadow', 'transparency'
    ],

    /**
     * Property: request
     * A get_image request destined for an ArcIMS server.
     */
    request: null,
    
    /**
     * Property: response
     * A parsed response from an ArcIMS server.
     */
    response: null,

    /**
     * Constructor: OpenLayers.Format.ArcXML
     * Create a new parser/writer for ArcXML.  Create an instance of this class
     *    to begin authoring a request to an ArcIMS service.  This is used
     *    primarily by the ArcIMS layer, but could be used to do other wild
     *    stuff, like geocoding.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        this.request = new OpenLayers.Format.ArcXML.Request();
        this.response = new OpenLayers.Format.ArcXML.Response();

        if (options) {
            if (options.requesttype == "feature") {
                this.request.get_image = null;
            
                var qry = this.request.get_feature.query;
                this.addCoordSys(qry.featurecoordsys, options.featureCoordSys);
                this.addCoordSys(qry.filtercoordsys, options.filterCoordSys);
            
                if (options.polygon) {
                    qry.isspatial = true;
                    qry.spatialfilter.polygon = options.polygon;
                } else if (options.envelope) {
                    qry.isspatial = true;
                    qry.spatialfilter.envelope = {minx:0, miny:0, maxx:0, maxy:0};
                    this.parseEnvelope(qry.spatialfilter.envelope, options.envelope);
                }
            } else if (options.requesttype == "image") {
                this.request.get_feature = null;
            
                var props = this.request.get_image.properties;
                this.parseEnvelope(props.envelope, options.envelope);
            
                this.addLayers(props.layerlist, options.layers);
                this.addImageSize(props.imagesize, options.tileSize);
                this.addCoordSys(props.featurecoordsys, options.featureCoordSys);
                this.addCoordSys(props.filtercoordsys, options.filterCoordSys);
            } else {
                // if an arcxml object is being created with no request type, it is
                // probably going to consume a response, so do not throw an error if
                // the requesttype is not defined
                this.request = null;
            }
        }
        
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * Method: parseEnvelope
     * Parse an array of coordinates into an ArcXML envelope structure.
     *
     * Parameters:
     * env - {Object} An envelope object that will contain the parsed coordinates.
     * arr - {Array(double)} An array of coordinates in the order: [ minx, miny, maxx, maxy ]
     */
    parseEnvelope: function(env, arr) {
        if (arr && arr.length == 4) {          
            env.minx = arr[0];
            env.miny = arr[1];
            env.maxx = arr[2];
            env.maxy = arr[3];
        }
    },
    
    /** 
     * Method: addLayers
     * Add a collection of layers to another collection of layers. Each layer in the list is tuple of
     * { id, visible }.  These layer collections represent the 
     * /ARCXML/REQUEST/get_image/PROPERTIES/LAYERLIST/LAYERDEF items in ArcXML
     *
     * TODO: Add support for dynamic layer rendering.
     *
     * Parameters:
     * ll - {Array({id,visible})} A list of layer definitions.
     * lyrs - {Array({id,visible})} A list of layer definitions.
     */
    addLayers: function(ll, lyrs) {
        for(var lind = 0, len=lyrs.length; lind < len; lind++) {
            ll.push(lyrs[lind]);
        }
    },
    
    /**
     * Method: addImageSize
     * Set the size of the requested image.
     *
     * Parameters:
     * imsize - {Object} An ArcXML imagesize object.
     * olsize - {<OpenLayers.Size>} The image size to set.
     */
    addImageSize: function(imsize, olsize) {
        if (olsize !== null) {
            imsize.width = olsize.w;
            imsize.height = olsize.h;
            imsize.printwidth = olsize.w;
            imsize.printheight = olsize.h;
        }
    },

    /**
     * Method: addCoordSys
     * Add the coordinate system information to an object. The object may be 
     *
     * Parameters:
     * featOrFilt - {Object} A featurecoordsys or filtercoordsys ArcXML structure.
     * fsys - {String} or {<OpenLayers.Projection>} or {filtercoordsys} or 
     * {featurecoordsys} A projection representation. If it's a {String}, 
     * the value is assumed to be the SRID.  If it's a {OpenLayers.Projection} 
     * AND Proj4js is available, the projection number and name are extracted 
     * from there.  If it's a filter or feature ArcXML structure, it is copied.
     */
    addCoordSys: function(featOrFilt, fsys) {
        if (typeof fsys == "string") {
            featOrFilt.id = parseInt(fsys);
            featOrFilt.string = fsys;
        }
        // is this a proj4js instance?
        else if (typeof fsys == "object" && fsys.proj !== null){
            featOrFilt.id = fsys.proj.srsProjNumber;
            featOrFilt.string = fsys.proj.srsCode;
        } else {
            featOrFilt = fsys;
        }
    },

    /**
     * APIMethod: iserror
     * Check to see if the response from the server was an error.
     *
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse. If nothing is supplied,
     * the current response is examined.
     *
     * Returns:
     * {Boolean} true if the response was an error.
     */
    iserror: function(data) {
        var ret = null; 
        
        if (!data) {
            ret = (this.response.error !== '');
        } else {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
            var errorNodes = data.documentElement.getElementsByTagName("ERROR");
            ret = (errorNodes !== null && errorNodes.length > 0);
        }

        return ret;
    },

    /**
     * APIMethod: read
     * Read data from a string, and return an response. 
     * 
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {<OpenLayers.Format.ArcXML.Response>} An ArcXML response. Note that this response
     *     data may change in the future. 
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        
        var arcNode = null;
        if (data && data.documentElement) {
            if(data.documentElement.nodeName == "ARCXML") {
                arcNode = data.documentElement;
            } else {
                arcNode = data.documentElement.getElementsByTagName("ARCXML")[0];
            }
        }
          
        // in Safari, arcNode will be there but will have a child named 
        // parsererror
        if (!arcNode || arcNode.firstChild.nodeName === 'parsererror') {
            var error, source;
            try {
                error = data.firstChild.nodeValue;
                source = data.firstChild.childNodes[1].firstChild.nodeValue;
            } catch (err) {
                // pass
            }
            throw {
                message: "Error parsing the ArcXML request", 
                error: error,
                source: source
            };
        }
        
        var response = this.parseResponse(arcNode);
        return response;
    },
    
    /**
     * APIMethod: write
     * Generate an ArcXml document string for sending to an ArcIMS server. 
     * 
     * Returns:
     * {String} A string representing the ArcXML document request.
     */
    write: function(request) {       
        if (!request) {
            request = this.request;
        }    
        var root = this.createElementNS("", "ARCXML");
        root.setAttribute("version","1.1");

        var reqElem = this.createElementNS("", "REQUEST");
        
        if (request.get_image != null) {
            var getElem = this.createElementNS("", "GET_IMAGE");
            reqElem.appendChild(getElem);

            var propElem = this.createElementNS("", "PROPERTIES");
            getElem.appendChild(propElem);

            var props = request.get_image.properties;
            if (props.featurecoordsys != null) {
                var feat = this.createElementNS("", "FEATURECOORDSYS");
                propElem.appendChild(feat);
                
                if (props.featurecoordsys.id === 0) {
                    feat.setAttribute("string", props.featurecoordsys['string']);
                }
                else {
                    feat.setAttribute("id", props.featurecoordsys.id);
                }
            }
          
            if (props.filtercoordsys != null) {
                var filt = this.createElementNS("", "FILTERCOORDSYS");
                propElem.appendChild(filt);

                if (props.filtercoordsys.id === 0) {
                    filt.setAttribute("string", props.filtercoordsys.string);
                }
                else {
                    filt.setAttribute("id", props.filtercoordsys.id);
                }
            }
          
            if (props.envelope != null) {
                var env = this.createElementNS("", "ENVELOPE");
                propElem.appendChild(env);

                env.setAttribute("minx", props.envelope.minx);
                env.setAttribute("miny", props.envelope.miny);
                env.setAttribute("maxx", props.envelope.maxx);
                env.setAttribute("maxy", props.envelope.maxy);
            }        
          
            var imagesz = this.createElementNS("", "IMAGESIZE");
            propElem.appendChild(imagesz);
          
            imagesz.setAttribute("height", props.imagesize.height);
            imagesz.setAttribute("width", props.imagesize.width);
          
            if (props.imagesize.height != props.imagesize.printheight ||
                 props.imagesize.width != props.imagesize.printwidth) {
                imagesz.setAttribute("printheight", props.imagesize.printheight);
                imagesz.setArrtibute("printwidth", props.imagesize.printwidth);
            }
          
            if (props.background != null) {
                var backgrnd = this.createElementNS("", "BACKGROUND");
                propElem.appendChild(backgrnd);
            
                backgrnd.setAttribute("color", 
                    props.background.color.r + "," + 
                    props.background.color.g + "," + 
                    props.background.color.b);
              
                if (props.background.transcolor !== null) {
                    backgrnd.setAttribute("transcolor", 
                        props.background.transcolor.r + "," + 
                        props.background.transcolor.g + "," + 
                        props.background.transcolor.b);
                }
            }
          
            if (props.layerlist != null && props.layerlist.length > 0) {
                var layerlst = this.createElementNS("", "LAYERLIST");
                propElem.appendChild(layerlst);
            
                for (var ld = 0; ld < props.layerlist.length; ld++) {
                    var ldef = this.createElementNS("", "LAYERDEF");
                    layerlst.appendChild(ldef);
              
                    ldef.setAttribute("id", props.layerlist[ld].id);
                    ldef.setAttribute("visible", props.layerlist[ld].visible);
              
                    if (typeof props.layerlist[ld].query == "object") {
                        var query = props.layerlist[ld].query;

                        if (query.where.length < 0) {
                            continue;
                        }
                  
                        var queryElem = null;
                        if (typeof query.spatialfilter == "boolean" && query.spatialfilter) {
                            // handle spatial filter madness
                            queryElem = this.createElementNS("", "SPATIALQUERY");
                        }
                        else {
                            queryElem = this.createElementNS("", "QUERY");
                        }
                
                        queryElem.setAttribute("where", query.where);
                
                        if (typeof query.accuracy == "number" && query.accuracy > 0) {
                            queryElem.setAttribute("accuracy", query.accuracy);
                        }
                        if (typeof query.featurelimit == "number" && query.featurelimit < 2000) {
                            queryElem.setAttribute("featurelimit", query.featurelimit);
                        }
                        if (typeof query.subfields == "string" && query.subfields != "#ALL#") {
                            queryElem.setAttribute("subfields", query.subfields);
                        }
                        if (typeof query.joinexpression == "string" && query.joinexpression.length > 0) {
                            queryElem.setAttribute("joinexpression", query.joinexpression);
                        }
                        if (typeof query.jointables == "string" && query.jointables.length > 0) {
                            queryElem.setAttribute("jointables", query.jointables);
                        }

                        ldef.appendChild(queryElem);
                    }
              
                    if (typeof props.layerlist[ld].renderer == "object") {
                        this.addRenderer(ldef, props.layerlist[ld].renderer);                  
                    }
                }
            }
        } else if (request.get_feature != null) {
            var getElem = this.createElementNS("", "GET_FEATURES");
            getElem.setAttribute("outputmode", "newxml");
            getElem.setAttribute("checkesc", "true");
          
            if (request.get_feature.geometry) {
                getElem.setAttribute("geometry", request.get_feature.geometry);
            }
            else {
                getElem.setAttribute("geometry", "false");
            }
          
            if (request.get_feature.compact) {
                getElem.setAttribute("compact", request.get_feature.compact);
            }
          
            if (request.get_feature.featurelimit == "number") {
                getElem.setAttribute("featurelimit", request.get_feature.featurelimit);
            }
          
            getElem.setAttribute("globalenvelope", "true");
            reqElem.appendChild(getElem);
          
            if (request.get_feature.layer != null && request.get_feature.layer.length > 0) {
                var lyrElem = this.createElementNS("", "LAYER");
                lyrElem.setAttribute("id", request.get_feature.layer);
                getElem.appendChild(lyrElem);
            }
          
            var fquery = request.get_feature.query;
            if (fquery != null) {
                var qElem = null;
                if (fquery.isspatial) {
                    qElem = this.createElementNS("", "SPATIALQUERY");
                } else {
                    qElem = this.createElementNS("", "QUERY");
                }
                getElem.appendChild(qElem);
                
                if (typeof fquery.accuracy == "number") {
                    qElem.setAttribute("accuracy", fquery.accuracy);
                }
                //qElem.setAttribute("featurelimit", "5");
            
                if (fquery.featurecoordsys != null) {
                    var fcsElem1 = this.createElementNS("", "FEATURECOORDSYS");
              
                    if (fquery.featurecoordsys.id == 0) {
                        fcsElem1.setAttribute("string", fquery.featurecoordsys.string);
                    } else {
                        fcsElem1.setAttribute("id", fquery.featurecoordsys.id);
                    }
                    qElem.appendChild(fcsElem1);
                }
            
                if (fquery.filtercoordsys != null) {
                    var fcsElem2 = this.createElementNS("", "FILTERCOORDSYS");
              
                    if (fquery.filtercoordsys.id === 0) {
                        fcsElem2.setAttribute("string", fquery.filtercoordsys.string);
                    } else {
                        fcsElem2.setAttribute("id", fquery.filtercoordsys.id);
                    }
                    qElem.appendChild(fcsElem2);
                }
            
                if (fquery.buffer > 0) {   
                    var bufElem = this.createElementNS("", "BUFFER");
                    bufElem.setAttribute("distance", fquery.buffer);
                    qElem.appendChild(bufElem);
                }
            
                if (fquery.isspatial) {
                    var spfElem = this.createElementNS("", "SPATIALFILTER");
                    spfElem.setAttribute("relation", fquery.spatialfilter.relation);
                    qElem.appendChild(spfElem);
              
                    if (fquery.spatialfilter.envelope) {
                        var envElem = this.createElementNS("", "ENVELOPE"); 
                        envElem.setAttribute("minx", fquery.spatialfilter.envelope.minx);
                        envElem.setAttribute("miny", fquery.spatialfilter.envelope.miny);
                        envElem.setAttribute("maxx", fquery.spatialfilter.envelope.maxx);
                        envElem.setAttribute("maxy", fquery.spatialfilter.envelope.maxy);
                        spfElem.appendChild(envElem);
                    } else if(typeof fquery.spatialfilter.polygon == "object") {
                        spfElem.appendChild(this.writePolygonGeometry(fquery.spatialfilter.polygon));                
                    }
                }
            
                if (fquery.where != null && fquery.where.length > 0) {
                    qElem.setAttribute("where", fquery.where);
                }
            }
        }

        root.appendChild(reqElem);

        return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
    },
    
    
    addGroupRenderer: function(ldef, toprenderer) {
        var topRelem = this.createElementNS("", "GROUPRENDERER");
        ldef.appendChild(topRelem);
      
        for (var rind = 0; rind < toprenderer.length; rind++) {
            var renderer = toprenderer[rind];
            this.addRenderer(topRelem, renderer);
        }
    },
    
    
    addRenderer: function(topRelem, renderer) {
        if (OpenLayers.Util.isArray(renderer)) {
            this.addGroupRenderer(topRelem, renderer);
        } else {
            var renderElem = this.createElementNS("", renderer.type.toUpperCase() + "RENDERER");
            topRelem.appendChild(renderElem);
          
            if (renderElem.tagName == "VALUEMAPRENDERER") {
                this.addValueMapRenderer(renderElem, renderer);
            } else if (renderElem.tagName == "VALUEMAPLABELRENDERER") {
                this.addValueMapLabelRenderer(renderElem, renderer);
            } else if (renderElem.tagName == "SIMPLELABELRENDERER") {
                this.addSimpleLabelRenderer(renderElem, renderer);
            } else if (renderElem.tagName == "SCALEDEPENDENTRENDERER") {
                this.addScaleDependentRenderer(renderElem, renderer);
            }
        }             
    },
    
    
    addScaleDependentRenderer: function(renderElem, renderer) {
        if (typeof renderer.lower == "string" || typeof renderer.lower == "number") {
            renderElem.setAttribute("lower", renderer.lower);
        }
        if (typeof renderer.upper == "string" || typeof renderer.upper == "number") {
            renderElem.setAttribute("upper", renderer.upper);
        }
        
        this.addRenderer(renderElem, renderer.renderer);
    },
    
    
    addValueMapLabelRenderer: function(renderElem, renderer) {
        renderElem.setAttribute("lookupfield", renderer.lookupfield);
        renderElem.setAttribute("labelfield", renderer.labelfield);
      
        if (typeof renderer.exacts == "object") {
            for (var ext=0, extlen=renderer.exacts.length; ext<extlen; ext++) {
                var exact = renderer.exacts[ext];
          
                var eelem = this.createElementNS("", "EXACT");
          
                if (typeof exact.value == "string") {
                    eelem.setAttribute("value", exact.value);
                }
                if (typeof exact.label == "string") {
                    eelem.setAttribute("label", exact.label);
                }
                if (typeof exact.method == "string") {
                    eelem.setAttribute("method", exact.method);
                }

                renderElem.appendChild(eelem);
            
                if (typeof exact.symbol == "object") {
                    var selem = null;
                
                    if (exact.symbol.type == "text") {
                        selem = this.createElementNS("", "TEXTSYMBOL");
                    }
                
                    if (selem != null) {
                        var keys = this.fontStyleKeys;
                        for (var i = 0, len = keys.length; i < len; i++) {
                            var key = keys[i];
                            if (exact.symbol[key]) {
                                selem.setAttribute(key, exact.symbol[key]);
                            }
                        }    
                        eelem.appendChild(selem);
                    }
                }
            } // for each exact
        }      
    },
    
    addValueMapRenderer: function(renderElem, renderer) {
        renderElem.setAttribute("lookupfield", renderer.lookupfield);
        
        if (typeof renderer.ranges == "object") {
            for(var rng=0, rnglen=renderer.ranges.length; rng<rnglen; rng++) {
                var range = renderer.ranges[rng];
                
                var relem = this.createElementNS("", "RANGE");
                relem.setAttribute("lower", range.lower);
                relem.setAttribute("upper", range.upper);
                
                renderElem.appendChild(relem);
                
                if (typeof range.symbol == "object") {
                    var selem = null;
              
                    if (range.symbol.type == "simplepolygon") {
                        selem = this.createElementNS("", "SIMPLEPOLYGONSYMBOL");
                    }
              
                    if (selem != null) {
                        if (typeof range.symbol.boundarycolor == "string") {
                            selem.setAttribute("boundarycolor", range.symbol.boundarycolor);
                        }
                        if (typeof range.symbol.fillcolor == "string") {
                            selem.setAttribute("fillcolor", range.symbol.fillcolor);
                        }
                        if (typeof range.symbol.filltransparency == "number") {
                            selem.setAttribute("filltransparency", range.symbol.filltransparency);
                        }
                        relem.appendChild(selem);
                    }   
                }
            } // for each range
        } else if (typeof renderer.exacts == "object") {
            for (var ext=0, extlen=renderer.exacts.length; ext<extlen; ext++) {
                var exact = renderer.exacts[ext];
          
                var eelem = this.createElementNS("", "EXACT");
                if (typeof exact.value == "string") {
                    eelem.setAttribute("value", exact.value);
                }
                if (typeof exact.label == "string") {
                    eelem.setAttribute("label", exact.label);
                }
                if (typeof exact.method == "string") {
                    eelem.setAttribute("method", exact.method);
                }
            
                renderElem.appendChild(eelem);
            
                if (typeof exact.symbol == "object") {
                    var selem = null;
            
                    if (exact.symbol.type == "simplemarker") {
                        selem = this.createElementNS("", "SIMPLEMARKERSYMBOL");
                    }
            
                    if (selem != null) {
                        if (typeof exact.symbol.antialiasing == "string") {
                            selem.setAttribute("antialiasing", exact.symbol.antialiasing);
                        }
                        if (typeof exact.symbol.color == "string") {
                            selem.setAttribute("color", exact.symbol.color);
                        }
                        if (typeof exact.symbol.outline == "string") {
                            selem.setAttribute("outline", exact.symbol.outline);
                        }
                        if (typeof exact.symbol.overlap == "string") {
                            selem.setAttribute("overlap", exact.symbol.overlap);
                        }
                        if (typeof exact.symbol.shadow == "string") {
                            selem.setAttribute("shadow", exact.symbol.shadow);
                        }
                        if (typeof exact.symbol.transparency == "number") {
                            selem.setAttribute("transparency", exact.symbol.transparency);
                        }
                        //if (typeof exact.symbol.type == "string")
                        //    selem.setAttribute("type", exact.symbol.type);
                        if (typeof exact.symbol.usecentroid == "string") {
                            selem.setAttribute("usecentroid", exact.symbol.usecentroid);
                        }
                        if (typeof exact.symbol.width == "number") {
                            selem.setAttribute("width", exact.symbol.width);
                        }
                
                        eelem.appendChild(selem);
                    }
                }
            } // for each exact
        }
    },
    
    
    addSimpleLabelRenderer: function(renderElem, renderer) {
        renderElem.setAttribute("field", renderer.field);
        var keys = ['featureweight', 'howmanylabels', 'labelbufferratio', 
                    'labelpriorities', 'labelweight', 'linelabelposition',
                    'rotationalangles'];
        for (var i=0, len=keys.length; i<len; i++) {
            var key = keys[i];
            if (renderer[key]) {
                renderElem.setAttribute(key, renderer[key]);
            }
        }     
           
        if (renderer.symbol.type == "text") {
            var symbol = renderer.symbol;
            var selem = this.createElementNS("", "TEXTSYMBOL");
            renderElem.appendChild(selem);
          
            var keys = this.fontStyleKeys;
            for (var i=0, len=keys.length; i<len; i++) {
                var key = keys[i];
                if (symbol[key]) {
                    selem.setAttribute(key, renderer[key]);
                }
            }    
        }    
    },
    
    writePolygonGeometry: function(polygon) {
        if (!(polygon instanceof OpenLayers.Geometry.Polygon)) {
            throw { 
                message:'Cannot write polygon geometry to ArcXML with an ' +
                    polygon.CLASS_NAME + ' object.',
                geometry: polygon
            };
        }
        
        var polyElem = this.createElementNS("", "POLYGON");
      
        for (var ln=0, lnlen=polygon.components.length; ln<lnlen; ln++) {
            var ring = polygon.components[ln];
            var ringElem = this.createElementNS("", "RING");
        
            for (var rn=0, rnlen=ring.components.length; rn<rnlen; rn++) {
                var point = ring.components[rn];
                var pointElem = this.createElementNS("", "POINT");
            
                pointElem.setAttribute("x", point.x);
                pointElem.setAttribute("y", point.y);
            
                ringElem.appendChild(pointElem);
            }
        
            polyElem.appendChild(ringElem);
        }
      
        return polyElem;
    },
    
    /**
     * Method: parseResponse
     * Take an ArcXML response, and parse in into this object's internal properties.
     *
     * Parameters:
     * data - {String} or {DOMElement} The ArcXML response, as either a string or the
     * top level DOMElement of the response.
     */
    parseResponse: function(data) {
        if(typeof data == "string") { 
            var newData = new OpenLayers.Format.XML();
            data = newData.read(data);
        }
        var response = new OpenLayers.Format.ArcXML.Response();
        
        var errorNode = data.getElementsByTagName("ERROR");
        
        if (errorNode != null && errorNode.length > 0) {
            response.error = this.getChildValue(errorNode, "Unknown error.");
        } else {
            var responseNode = data.getElementsByTagName("RESPONSE");
          
            if (responseNode == null || responseNode.length == 0) {
                response.error = "No RESPONSE tag found in ArcXML response.";
                return response;
            }
          
            var rtype = responseNode[0].firstChild.nodeName;
            if (rtype == "#text") {
                rtype = responseNode[0].firstChild.nextSibling.nodeName;
            }
          
            if (rtype == "IMAGE") {
                var envelopeNode = data.getElementsByTagName("ENVELOPE");
                var outputNode = data.getElementsByTagName("OUTPUT");
                
                if (envelopeNode == null || envelopeNode.length == 0) {
                    response.error = "No ENVELOPE tag found in ArcXML response.";
                } else if (outputNode == null || outputNode.length == 0) {
                    response.error = "No OUTPUT tag found in ArcXML response.";
                } else {
                    var envAttr = this.parseAttributes(envelopeNode[0]);            
                    var outputAttr = this.parseAttributes(outputNode[0]);
                  
                    if (typeof outputAttr.type == "string") {
                        response.image = { 
                            envelope: envAttr, 
                            output: { 
                                type: outputAttr.type, 
                                data: this.getChildValue(outputNode[0])
                            }
                        };
                    } else {
                        response.image = { envelope: envAttr, output: outputAttr };
                    }
                }
            } else if (rtype == "FEATURES") {
                var features = responseNode[0].getElementsByTagName("FEATURES");
            
                // get the feature count
                var featureCount = features[0].getElementsByTagName("FEATURECOUNT");
                response.features.featurecount = featureCount[0].getAttribute("count");
            
                if (response.features.featurecount > 0) {
                    // get the feature envelope
                    var envelope = features[0].getElementsByTagName("ENVELOPE");
                    response.features.envelope = this.parseAttributes(envelope[0], typeof(0));

                    // get the field values per feature
                    var featureList = features[0].getElementsByTagName("FEATURE");
                    for (var fn = 0; fn < featureList.length; fn++) {
                        var feature = new OpenLayers.Feature.Vector();
                        var fields = featureList[fn].getElementsByTagName("FIELD");

                        for (var fdn = 0; fdn < fields.length; fdn++) {
                            var fieldName = fields[fdn].getAttribute("name");
                            var fieldValue = fields[fdn].getAttribute("value");
                            feature.attributes[ fieldName ] = fieldValue;
                        }

                        var geom = featureList[fn].getElementsByTagName("POLYGON");

                        if (geom.length > 0) {
                            // if there is a polygon, create an openlayers polygon, and assign
                            // it to the .geometry property of the feature
                            var ring = geom[0].getElementsByTagName("RING");

                            var polys = [];
                            for (var rn = 0; rn < ring.length; rn++) {
                                var linearRings = [];
                                linearRings.push(this.parsePointGeometry(ring[rn]));

                                var holes = ring[rn].getElementsByTagName("HOLE");
                                for (var hn = 0; hn < holes.length; hn++) {
                                    linearRings.push(this.parsePointGeometry(holes[hn]));
                                }
                                holes = null;
                                polys.push(new OpenLayers.Geometry.Polygon(linearRings));
                                linearRings = null;
                            }
                            ring = null;
                          
                            if (polys.length == 1) {
                                feature.geometry = polys[0];
                            } else
                            {
                                feature.geometry = new OpenLayers.Geometry.MultiPolygon(polys);
                            }
                        }

                        response.features.feature.push(feature);
                    }
                }
            } else {
                response.error = "Unidentified response type.";
            }
        }
        return response;
    },
    
    
    /**
     * Method: parseAttributes
     *
     * Parameters:
     * node - {<DOMElement>} An element to parse attributes from.
     *
     * Returns:
     * {Object} An attributes object, with properties set to attribute values.
     */
    parseAttributes: function(node,type) {
        var attributes = {};
        for(var attr = 0; attr < node.attributes.length; attr++) {
            if (type == "number") {
                attributes[node.attributes[attr].nodeName] = parseFloat(node.attributes[attr].nodeValue);
            } else {
                attributes[node.attributes[attr].nodeName] = node.attributes[attr].nodeValue;
            }
        }
        return attributes;
    },
    
    
    /**
     * Method: parsePointGeometry
     *
     * Parameters:
     * node - {<DOMElement>} An element to parse <COORDS> or <POINT> arcxml data from.
     *
     * Returns:
     * {<OpenLayers.Geometry.LinearRing>} A linear ring represented by the node's points.
     */
    parsePointGeometry: function(node) {
        var ringPoints = [];
        var coords = node.getElementsByTagName("COORDS");

        if (coords.length > 0) {
            // if coords is present, it's the only coords item
            var coordArr = this.getChildValue(coords[0]);
            coordArr = coordArr.split(/;/);
            for (var cn = 0; cn < coordArr.length; cn++) {
                var coordItems = coordArr[cn].split(/ /);
                ringPoints.push(new OpenLayers.Geometry.Point(coordItems[0], coordItems[1]));
            }
            coords = null;
        } else {
            var point = node.getElementsByTagName("POINT");
            if (point.length > 0) {
                for (var pn = 0; pn < point.length; pn++) {
                    ringPoints.push(
                        new OpenLayers.Geometry.Point(
                            parseFloat(point[pn].getAttribute("x")),
                            parseFloat(point[pn].getAttribute("y"))
                        )
                    );
                }
            }
            point = null;
        }

        return new OpenLayers.Geometry.LinearRing(ringPoints);      
    },
    
    CLASS_NAME: "OpenLayers.Format.ArcXML" 
});

OpenLayers.Format.ArcXML.Request = OpenLayers.Class({
    initialize: function(params) {
        var defaults = {
            get_image: {
                properties: {
                    background: null,
                    /*{ 
                        color: { r:255, g:255, b:255 },
                        transcolor: null
                    },*/
                    draw: true,
                    envelope: {
                        minx: 0, 
                        miny: 0, 
                        maxx: 0, 
                        maxy: 0
                    },
                    featurecoordsys: { 
                        id:0, 
                        string:"",
                        datumtransformid:0,
                        datumtransformstring:""
                    },
                    filtercoordsys:{
                        id:0,
                        string:"",
                        datumtransformid:0,
                        datumtransformstring:""
                    },
                    imagesize:{
                        height:0,
                        width:0,
                        dpi:96,
                        printheight:0,
                        printwidth:0,
                        scalesymbols:false
                    },
                    layerlist:[],
                    /* no support for legends */
                    output:{
                        baseurl:"",
                        legendbaseurl:"",
                        legendname:"",
                        legendpath:"",
                        legendurl:"",
                        name:"",
                        path:"",
                        type:"jpg",
                        url:""
                    }
                }
            },

            get_feature: {
                layer: "",
                query: {
                    isspatial: false,
                    featurecoordsys: {
                        id:0,
                        string:"",
                        datumtransformid:0,
                        datumtransformstring:""
                    },
                    filtercoordsys: {
                        id:0,
                        string:"",
                        datumtransformid:0,
                        datumtransformstring:""
                    },
                    buffer:0,
                    where:"",
                    spatialfilter: {
                        relation: "envelope_intersection",
                        envelope: null
                    }
                }
            },
      
            environment: {
                separators: {
                    cs:" ",
                    ts:";"
                }
            },
      
            layer: [],
            workspaces: []
        };
      
        return OpenLayers.Util.extend(this, defaults);      
    },
  
    CLASS_NAME: "OpenLayers.Format.ArcXML.Request"
});

OpenLayers.Format.ArcXML.Response = OpenLayers.Class({  
    initialize: function(params) {
        var defaults = {
            image: {
                envelope:null,
                output:''
            },
      
            features: {
                featurecount: 0,
                envelope: null,
                feature: []
            },
      
            error:''
        };
  
        return OpenLayers.Util.extend(this, defaults);
    },
  
    CLASS_NAME: "OpenLayers.Format.ArcXML.Response"
});
/* ======================================================================
    OpenLayers/Request.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Events.js
 */

/**
 * TODO: deprecate me
 * Use OpenLayers.Request.proxy instead.
 */
OpenLayers.ProxyHost = "";

/**
 * Namespace: OpenLayers.Request
 * The OpenLayers.Request namespace contains convenience methods for working
 *     with XMLHttpRequests.  These methods work with a cross-browser
 *     W3C compliant <OpenLayers.Request.XMLHttpRequest> class.
 */
OpenLayers.Request = {
    
    /**
     * Constant: DEFAULT_CONFIG
     * {Object} Default configuration for all requests.
     */
    DEFAULT_CONFIG: {
        method: "GET",
        url: window.location.href,
        async: true,
        user: undefined,
        password: undefined,
        params: null,
        proxy: OpenLayers.ProxyHost,
        headers: {},
        data: null,
        callback: function() {},
        success: null,
        failure: null,
        scope: null
    },
    
    /**
     * Constant: URL_SPLIT_REGEX
     */
    URL_SPLIT_REGEX: /([^:]*:)\/\/([^:]*:?[^@]*@)?([^:\/\?]*):?([^\/\?]*)/,
    
    /**
     * APIProperty: events
     * {<OpenLayers.Events>} An events object that handles all 
     *     events on the {<OpenLayers.Request>} object.
     *
     * All event listeners will receive an event object with three properties:
     * request - {<OpenLayers.Request.XMLHttpRequest>} The request object.
     * config - {Object} The config object sent to the specific request method.
     * requestUrl - {String} The request url.
     * 
     * Supported event types:
     * complete - Triggered when we have a response from the request, if a
     *     listener returns false, no further response processing will take
     *     place.
     * success - Triggered when the HTTP response has a success code (200-299).
     * failure - Triggered when the HTTP response does not have a success code.
     */
    events: new OpenLayers.Events(this),
    
    /**
     * Method: makeSameOrigin
     * Using the specified proxy, returns a same origin url of the provided url.
     *
     * Parameters:
     * url - {String} An arbitrary url
     * proxy {String|Function} The proxy to use to make the provided url a
     *     same origin url.
     *
     * Returns
     * {String} the same origin url. If no proxy is provided, the returned url
     *     will be the same as the provided url.
     */
    makeSameOrigin: function(url, proxy) {
        var sameOrigin = url.indexOf("http") !== 0;
        var urlParts = !sameOrigin && url.match(this.URL_SPLIT_REGEX);
        if (urlParts) {
            var location = window.location;
            sameOrigin =
                urlParts[1] == location.protocol &&
                urlParts[3] == location.hostname;
            var uPort = urlParts[4], lPort = location.port;
            if (uPort != 80 && uPort != "" || lPort != "80" && lPort != "") {
                sameOrigin = sameOrigin && uPort == lPort;
            }
        }
        if (!sameOrigin) {
            if (proxy) {
                if (typeof proxy == "function") {
                    url = proxy(url);
                } else {
                    url = proxy + encodeURIComponent(url);
                }
            } else {
                OpenLayers.Console.warn(
                    OpenLayers.i18n("proxyNeeded"), {url: url});
            }
        }
        return url;
    },

    /**
     * APIMethod: issue
     * Create a new XMLHttpRequest object, open it, set any headers, bind
     *     a callback to done state, and send any data.  It is recommended that
     *     you use one <GET>, <POST>, <PUT>, <DELETE>, <OPTIONS>, or <HEAD>.
     *     This method is only documented to provide detail on the configuration
     *     options available to all request methods.
     *
     * Parameters:
     * config - {Object} Object containing properties for configuring the
     *     request.  Allowed configuration properties are described below.
     *     This object is modified and should not be reused.
     *
     * Allowed config properties:
     * method - {String} One of GET, POST, PUT, DELETE, HEAD, or
     *     OPTIONS.  Default is GET.
     * url - {String} URL for the request.
     * async - {Boolean} Open an asynchronous request.  Default is true.
     * user - {String} User for relevant authentication scheme.  Set
     *     to null to clear current user.
     * password - {String} Password for relevant authentication scheme.
     *     Set to null to clear current password.
     * proxy - {String} Optional proxy.  Defaults to
     *     <OpenLayers.ProxyHost>.
     * params - {Object} Any key:value pairs to be appended to the
     *     url as a query string.  Assumes url doesn't already include a query
     *     string or hash.  Typically, this is only appropriate for <GET>
     *     requests where the query string will be appended to the url.
     *     Parameter values that are arrays will be
     *     concatenated with a comma (note that this goes against form-encoding)
     *     as is done with <OpenLayers.Util.getParameterString>.
     * headers - {Object} Object with header:value pairs to be set on
     *     the request.
     * data - {String | Document} Optional data to send with the request.
     *     Typically, this is only used with <POST> and <PUT> requests.
     *     Make sure to provide the appropriate "Content-Type" header for your
     *     data.  For <POST> and <PUT> requests, the content type defaults to
     *     "application-xml".  If your data is a different content type, or
     *     if you are using a different HTTP method, set the "Content-Type"
     *     header to match your data type.
     * callback - {Function} Function to call when request is done.
     *     To determine if the request failed, check request.status (200
     *     indicates success).
     * success - {Function} Optional function to call if request status is in
     *     the 200s.  This will be called in addition to callback above and
     *     would typically only be used as an alternative.
     * failure - {Function} Optional function to call if request status is not
     *     in the 200s.  This will be called in addition to callback above and
     *     would typically only be used as an alternative.
     * scope - {Object} If callback is a public method on some object,
     *     set the scope to that object.
     *
     * Returns:
     * {XMLHttpRequest} Request object.  To abort the request before a response
     *     is received, call abort() on the request object.
     */
    issue: function(config) {        
        // apply default config - proxy host may have changed
        var defaultConfig = OpenLayers.Util.extend(
            this.DEFAULT_CONFIG,
            {proxy: OpenLayers.ProxyHost}
        );
        config = OpenLayers.Util.applyDefaults(config, defaultConfig);
        
        // Always set the "X-Requested-With" header to signal that this request
        // was issued through the XHR-object. Since header keys are case 
        // insensitive and we want to allow overriding of the "X-Requested-With"
        // header through the user we cannot use applyDefaults, but have to 
        // check manually whether we were called with a "X-Requested-With"
        // header.
        var customRequestedWithHeader = false,
            headerKey;
        for(headerKey in config.headers) {
            if (config.headers.hasOwnProperty( headerKey )) {
                if (headerKey.toLowerCase() === 'x-requested-with') {
                    customRequestedWithHeader = true;
                }
            }
        }
        if (customRequestedWithHeader === false) {
            // we did not have a custom "X-Requested-With" header
            config.headers['X-Requested-With'] = 'XMLHttpRequest';
        }

        // create request, open, and set headers
        var request = new OpenLayers.Request.XMLHttpRequest();
        var url = OpenLayers.Util.urlAppend(config.url, 
            OpenLayers.Util.getParameterString(config.params || {}));
        url = OpenLayers.Request.makeSameOrigin(url, config.proxy);
        request.open(
            config.method, url, config.async, config.user, config.password
        );
        for(var header in config.headers) {
            request.setRequestHeader(header, config.headers[header]);
        }

        var events = this.events;

        // we want to execute runCallbacks with "this" as the
        // execution scope
        var self = this;
        
        request.onreadystatechange = function() {
            if(request.readyState == OpenLayers.Request.XMLHttpRequest.DONE) {
                var proceed = events.triggerEvent(
                    "complete",
                    {request: request, config: config, requestUrl: url}
                );
                if(proceed !== false) {
                    self.runCallbacks(
                        {request: request, config: config, requestUrl: url}
                    );
                }
            }
        };
        
        // send request (optionally with data) and return
        // call in a timeout for asynchronous requests so the return is
        // available before readyState == 4 for cached docs
        if(config.async === false) {
            request.send(config.data);
        } else {
            window.setTimeout(function(){
                if (request.readyState !== 0) { // W3C: 0-UNSENT
                    request.send(config.data);
                }
            }, 0);
        }
        return request;
    },
    
    /**
     * Method: runCallbacks
     * Calls the complete, success and failure callbacks. Application
     *    can listen to the "complete" event, have the listener 
     *    display a confirm window and always return false, and
     *    execute OpenLayers.Request.runCallbacks if the user
     *    hits "yes" in the confirm window.
     *
     * Parameters:
     * options - {Object} Hash containing request, config and requestUrl keys
     */
    runCallbacks: function(options) {
        var request = options.request;
        var config = options.config;
        
        // bind callbacks to readyState 4 (done)
        var complete = (config.scope) ?
            OpenLayers.Function.bind(config.callback, config.scope) :
            config.callback;
        
        // optional success callback
        var success;
        if(config.success) {
            success = (config.scope) ?
                OpenLayers.Function.bind(config.success, config.scope) :
                config.success;
        }

        // optional failure callback
        var failure;
        if(config.failure) {
            failure = (config.scope) ?
                OpenLayers.Function.bind(config.failure, config.scope) :
                config.failure;
        }

        if (OpenLayers.Util.createUrlObject(config.url).protocol == "file:" &&
                                                        request.responseText) {
            request.status = 200;
        }
        complete(request);

        if (!request.status || (request.status >= 200 && request.status < 300)) {
            this.events.triggerEvent("success", options);
            if(success) {
                success(request);
            }
        }
        if(request.status && (request.status < 200 || request.status >= 300)) {                    
            this.events.triggerEvent("failure", options);
            if(failure) {
                failure(request);
            }
        }
    },
    
    /**
     * APIMethod: GET
     * Send an HTTP GET request.  Additional configuration properties are
     *     documented in the <issue> method, with the method property set
     *     to GET.
     *
     * Parameters:
     * config - {Object} Object with properties for configuring the request.
     *     See the <issue> method for documentation of allowed properties.
     *     This object is modified and should not be reused.
     * 
     * Returns:
     * {XMLHttpRequest} Request object.
     */
    GET: function(config) {
        config = OpenLayers.Util.extend(config, {method: "GET"});
        return OpenLayers.Request.issue(config);
    },
    
    /**
     * APIMethod: POST
     * Send a POST request.  Additional configuration properties are
     *     documented in the <issue> method, with the method property set
     *     to POST and "Content-Type" header set to "application/xml".
     *
     * Parameters:
     * config - {Object} Object with properties for configuring the request.
     *     See the <issue> method for documentation of allowed properties.  The
     *     default "Content-Type" header will be set to "application-xml" if
     *     none is provided.  This object is modified and should not be reused.
     * 
     * Returns:
     * {XMLHttpRequest} Request object.
     */
    POST: function(config) {
        config = OpenLayers.Util.extend(config, {method: "POST"});
        // set content type to application/xml if it isn't already set
        config.headers = config.headers ? config.headers : {};
        if(!("CONTENT-TYPE" in OpenLayers.Util.upperCaseObject(config.headers))) {
            config.headers["Content-Type"] = "application/xml";
        }
        return OpenLayers.Request.issue(config);
    },
    
    /**
     * APIMethod: PUT
     * Send an HTTP PUT request.  Additional configuration properties are
     *     documented in the <issue> method, with the method property set
     *     to PUT and "Content-Type" header set to "application/xml".
     *
     * Parameters:
     * config - {Object} Object with properties for configuring the request.
     *     See the <issue> method for documentation of allowed properties.  The
     *     default "Content-Type" header will be set to "application-xml" if
     *     none is provided.  This object is modified and should not be reused.
     * 
     * Returns:
     * {XMLHttpRequest} Request object.
     */
    PUT: function(config) {
        config = OpenLayers.Util.extend(config, {method: "PUT"});
        // set content type to application/xml if it isn't already set
        config.headers = config.headers ? config.headers : {};
        if(!("CONTENT-TYPE" in OpenLayers.Util.upperCaseObject(config.headers))) {
            config.headers["Content-Type"] = "application/xml";
        }
        return OpenLayers.Request.issue(config);
    },
    
    /**
     * APIMethod: DELETE
     * Send an HTTP DELETE request.  Additional configuration properties are
     *     documented in the <issue> method, with the method property set
     *     to DELETE.
     *
     * Parameters:
     * config - {Object} Object with properties for configuring the request.
     *     See the <issue> method for documentation of allowed properties.
     *     This object is modified and should not be reused.
     * 
     * Returns:
     * {XMLHttpRequest} Request object.
     */
    DELETE: function(config) {
        config = OpenLayers.Util.extend(config, {method: "DELETE"});
        return OpenLayers.Request.issue(config);
    },
  
    /**
     * APIMethod: HEAD
     * Send an HTTP HEAD request.  Additional configuration properties are
     *     documented in the <issue> method, with the method property set
     *     to HEAD.
     *
     * Parameters:
     * config - {Object} Object with properties for configuring the request.
     *     See the <issue> method for documentation of allowed properties.
     *     This object is modified and should not be reused.
     * 
     * Returns:
     * {XMLHttpRequest} Request object.
     */
    HEAD: function(config) {
        config = OpenLayers.Util.extend(config, {method: "HEAD"});
        return OpenLayers.Request.issue(config);
    },
    
    /**
     * APIMethod: OPTIONS
     * Send an HTTP OPTIONS request.  Additional configuration properties are
     *     documented in the <issue> method, with the method property set
     *     to OPTIONS.
     *
     * Parameters:
     * config - {Object} Object with properties for configuring the request.
     *     See the <issue> method for documentation of allowed properties.
     *     This object is modified and should not be reused.
     * 
     * Returns:
     * {XMLHttpRequest} Request object.
     */
    OPTIONS: function(config) {
        config = OpenLayers.Util.extend(config, {method: "OPTIONS"});
        return OpenLayers.Request.issue(config);
    }

};
/* ======================================================================
    OpenLayers/Layer/ArcIMS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Grid.js
 * @requires OpenLayers/Format/ArcXML.js
 * @requires OpenLayers/Request.js
 */

/**
 * Class: OpenLayers.Layer.ArcIMS
 * Instances of OpenLayers.Layer.ArcIMS are used to display data from ESRI ArcIMS
 *     Mapping Services. Create a new ArcIMS layer with the <OpenLayers.Layer.ArcIMS>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.ArcIMS = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /**
     * Constant: DEFAULT_PARAMS
     * {Object} Default query string parameters.
     */
    DEFAULT_PARAMS: { 
        ClientVersion: "9.2",
        ServiceName: ''
    },
    
    /**
     * APIProperty: featureCoordSys
     * {String} Code for feature coordinate system.  Default is "4326".
     */
    featureCoordSys: "4326",
    
    /**
     * APIProperty: filterCoordSys
     * {String} Code for filter coordinate system.  Default is "4326".
     */
    filterCoordSys: "4326",
    
    /**
     * APIProperty: layers
     * {Array} An array of objects with layer properties.
     */
    layers: null,
    
    /**
     * APIProperty: async
     * {Boolean} Request images asynchronously.  Default is true.
     */
    async: true,
    
    /**
     * APIProperty: name
     * {String} Layer name.  Default is "ArcIMS".
     */
    name: "ArcIMS",

    /**
     * APIProperty: isBaseLayer
     * {Boolean} The layer is a base layer.  Default is true.
     */
    isBaseLayer: true,

    /**
     * Constant: DEFAULT_OPTIONS
     * {Object} Default layers properties.
     */
    DEFAULT_OPTIONS: {
        tileSize: new OpenLayers.Size(512, 512),
        featureCoordSys: "4326",
        filterCoordSys: "4326",
        layers: null,
        isBaseLayer: true,
        async: true,
        name: "ArcIMS"
    }, 
 
    /**
     * Constructor: OpenLayers.Layer.ArcIMS
     * Create a new ArcIMS layer object.
     *
     * Example:
     * (code)
     * var arcims = new OpenLayers.Layer.ArcIMS(
     *     "Global Sample",
     *     "http://sample.avencia.com/servlet/com.esri.esrimap.Esrimap", 
     *     {
     *         service: "OpenLayers_Sample", 
     *         layers: [
     *             // layers to manipulate
     *             {id: "1", visible: true}
     *         ]
     *     }
     * );
     * (end)
     *
     * Parameters:
     * name - {String} A name for the layer
     * url - {String} Base url for the ArcIMS server
     * options - {Object} Optional object with properties to be set on the
     *     layer.
     */
    initialize: function(name, url, options) {
        
        this.tileSize = new OpenLayers.Size(512, 512);

        // parameters
        this.params = OpenLayers.Util.applyDefaults(
            {ServiceName: options.serviceName},
            this.DEFAULT_PARAMS
        );
        this.options = OpenLayers.Util.applyDefaults(
            options, this.DEFAULT_OPTIONS
        );
          
        OpenLayers.Layer.Grid.prototype.initialize.apply(
            this, [name, url, this.params, options]
        );

        //layer is transparent        
        if (this.transparent) {
            
            // unless explicitly set in options, make layer an overlay
            if (!this.isBaseLayer) {
                this.isBaseLayer = false;
            } 
            
            // jpegs can never be transparent, so intelligently switch the 
            //  format, depending on the browser's capabilities
            if (this.format == "image/jpeg") {
                this.format = OpenLayers.Util.alphaHack() ? "image/gif" : "image/png";
            }
        }

        // create an empty layer list if no layers specified in the options
        if (this.options.layers === null) {
            this.options.layers = [];
        }
    },    

    /**
     * Method: getURL
     * Return an image url this layer.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
     *     request.
     *
     * Returns:
     * {String} A string with the map image's url.
     */
    getURL: function(bounds) {
        var url = "";
        bounds = this.adjustBounds(bounds);
        
        // create an arcxml request to generate the image
        var axlReq = new OpenLayers.Format.ArcXML( 
            OpenLayers.Util.extend(this.options, {
                requesttype: "image",
                envelope: bounds.toArray(),
                tileSize: this.tileSize
            })
        );
        
        // create a synchronous ajax request to get an arcims image
        var req = new OpenLayers.Request.POST({
            url: this.getFullRequestString(),
            data: axlReq.write(),
            async: false
        });
        
        // if the response exists
        if (req != null) {
            var doc = req.responseXML;

            if (!doc || !doc.documentElement) {            
                doc = req.responseText;
            }

            // create a new arcxml format to read the response
            var axlResp = new OpenLayers.Format.ArcXML();
            var arcxml = axlResp.read(doc);
            url = this.getUrlOrImage(arcxml.image.output);
        }
        
        return url;
    },
    
    
    /**
     * Method: getURLasync
     * Get an image url this layer asynchronously, and execute a callback
     *     when the image url is generated.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
     *     request.
     * callback - {Function} Function to call when image url is retrieved.
     * scope - {Object} The scope of the callback method.
     */
    getURLasync: function(bounds, callback, scope) {
        bounds = this.adjustBounds(bounds);
        
        // create an arcxml request to generate the image
        var axlReq = new OpenLayers.Format.ArcXML(  
            OpenLayers.Util.extend(this.options, { 
                requesttype: "image",
                envelope: bounds.toArray(),
                tileSize: this.tileSize
            })
        );
        
        // create an asynchronous ajax request to get an arcims image
        OpenLayers.Request.POST({
            url: this.getFullRequestString(),
            async: true,
            data: axlReq.write(),
            callback: function(req) {
                // process the response from ArcIMS, and call the callback function
                // to set the image URL
                var doc = req.responseXML;
                if (!doc || !doc.documentElement) {            
                    doc = req.responseText;
                }

                // create a new arcxml format to read the response
                var axlResp = new OpenLayers.Format.ArcXML();
                var arcxml = axlResp.read(doc);
                
                callback.call(scope, this.getUrlOrImage(arcxml.image.output));
            },
            scope: this
        });
    },
    
    /**
     * Method: getUrlOrImage
     * Extract a url or image from the ArcXML image output.
     *
     * Parameters:
     * output - {Object} The image.output property of the object returned from
     *     the ArcXML format read method.
     *
     * Returns:
     * {String} A URL for an image (potentially with the data protocol).
     */
    getUrlOrImage: function(output) {
        var ret = "";
        if(output.url) {
            // If the image response output url is a string, then the image
            // data is not inline.
            ret = output.url;
        } else if(output.data) {
            // The image data is inline and base64 encoded, create a data
            // url for the image.  This will only work for small images,
            // due to browser url length limits.
            ret = "data:image/" + output.type + 
                  ";base64," + output.data;
        }
        return ret;
    },
    
    /**
     * Method: setLayerQuery
     * Set the query definition on this layer. Query definitions are used to
     *     render parts of the spatial data in an image, and can be used to
     *     filter features or layers in the ArcIMS service.
     *
     * Parameters:
     * id - {String} The ArcIMS layer ID.
     * querydef - {Object} The query definition to apply to this layer.
     */
    setLayerQuery: function(id, querydef) {
        // find the matching layer, if it exists
        for (var lyr = 0; lyr < this.options.layers.length; lyr++) {
            if (id == this.options.layers[lyr].id) {
                // replace this layer definition
                this.options.layers[lyr].query = querydef;
                return;
            }
        }
      
        // no layer found, create a new definition
        this.options.layers.push({id: id, visible: true, query: querydef});
    },
    
    /**
     * Method: getFeatureInfo
     * Get feature information from ArcIMS.  Using the applied geometry, apply
     *     the options to the query (buffer, area/envelope intersection), and
     *     query the ArcIMS service.
     *
     * A note about accuracy:
     * ArcIMS interprets the accuracy attribute in feature requests to be
     *     something like the 'modulus' operator on feature coordinates,
     *     applied to the database geometry of the feature.  It doesn't round,
     *     so your feature coordinates may be up to (1 x accuracy) offset from
     *     the actual feature coordinates.  If the accuracy of the layer is not
     *     specified, the accuracy will be computed to be approximately 1
     *     feature coordinate per screen  pixel.
     *
     * Parameters:
     * geometry - {<OpenLayers.LonLat>} or {<OpenLayers.Geometry.Polygon>} The
     *     geometry to use when making the query. This should be a closed
     *     polygon for behavior approximating a free selection.
     * layer - {Object} The ArcIMS layer definition. This is an anonymous object
     *     that looks like:
     * (code)
     * {
     *     id: "ArcXML layer ID",  // the ArcXML layer ID
     *     query: {
     *         where: "STATE = 'PA'",  // the where clause of the query
     *         accuracy: 100           // the accuracy of the returned feature
     *     }
     * }
     * (end)
     * options - {Object} Object with non-default properties to set on the layer.
     *     Supported properties are buffer, callback, scope, and any other
     *     properties applicable to the ArcXML format.  Set the 'callback' and
     *     'scope' for an object and function to recieve the parsed features
     *     from ArcIMS.
     */
    getFeatureInfo: function(geometry, layer, options) {
        // set the buffer to 1 unit (dd/m/ft?) by default
        var buffer = options.buffer || 1;
        // empty callback by default
        var callback = options.callback || function() {};
        // default scope is window (global)
        var scope = options.scope || window;

        // apply these option to the request options
        var requestOptions = {};
        OpenLayers.Util.extend(requestOptions, this.options);

        // this is a feature request
        requestOptions.requesttype = "feature";

        if (geometry instanceof OpenLayers.LonLat) {
            // create an envelope if the geometry is really a lon/lat
            requestOptions.polygon = null;
            requestOptions.envelope = [ 
                geometry.lon - buffer, 
                geometry.lat - buffer,
                geometry.lon + buffer,
                geometry.lat + buffer
            ];
        } else if (geometry instanceof OpenLayers.Geometry.Polygon) {
            // use the polygon assigned, and empty the envelope
            requestOptions.envelope = null;
            requestOptions.polygon = geometry;
        }
      
        // create an arcxml request to get feature requests
        var arcxml = new OpenLayers.Format.ArcXML(requestOptions);

        // apply any get feature options to the arcxml request
        OpenLayers.Util.extend(arcxml.request.get_feature, options);

        arcxml.request.get_feature.layer = layer.id;
        if (typeof layer.query.accuracy == "number") {
            // set the accuracy if it was specified
            arcxml.request.get_feature.query.accuracy = layer.query.accuracy;
        } else {
            // guess that the accuracy is 1 per screen pixel
            var mapCenter = this.map.getCenter();
            var viewPx = this.map.getViewPortPxFromLonLat(mapCenter);
            viewPx.x++;
            var mapOffCenter = this.map.getLonLatFromPixel(viewPx);
            arcxml.request.get_feature.query.accuracy = mapOffCenter.lon - mapCenter.lon;
        }
        
        // set the get_feature query to be the same as the layer passed in
        arcxml.request.get_feature.query.where = layer.query.where;
        
        // use area_intersection
        arcxml.request.get_feature.query.spatialfilter.relation = "area_intersection";
      
        // create a new asynchronous request to get the feature info
        OpenLayers.Request.POST({
            url: this.getFullRequestString({'CustomService': 'Query'}),
            data: arcxml.write(),
            callback: function(request) {
                // parse the arcxml response
                var response = arcxml.parseResponse(request.responseText);
                
                if (!arcxml.iserror()) {
                    // if the arcxml is not an error, call the callback with the features parsed
                    callback.call(scope, response.features);
                } else {
                    // if the arcxml is an error, return null features selected
                    callback.call(scope, null);
                }
            }
        });
    },

    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Returns:
     * {<OpenLayers.Layer.ArcIMS>} An exact clone of this layer
     */
    clone: function (obj) {

        if (obj == null) {
            obj = new OpenLayers.Layer.ArcIMS(this.name,
                                           this.url,
                                           this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },
    
    CLASS_NAME: "OpenLayers.Layer.ArcIMS"
});
/* ======================================================================
    OpenLayers/Format/OWSCommon/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/OWSCommon/v1.js
 */

/**
 * Class: OpenLayers.Format.OWSCommon.v1_1_0
 * Parser for OWS Common version 1.1.0.
 *
 * Inherits from:
 *  - <OpenLayers.Format.OWSCommon.v1>
 */
OpenLayers.Format.OWSCommon.v1_1_0 = OpenLayers.Class(OpenLayers.Format.OWSCommon.v1, {

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows/1.1",
        xlink: "http://www.w3.org/1999/xlink"
    },    
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ows": OpenLayers.Util.applyDefaults({
            "ExceptionReport": function(node, obj) {
                obj.exceptionReport = {
                    version: node.getAttribute('version'),
                    language: node.getAttribute('xml:lang'),
                    exceptions: []
                };
                this.readChildNodes(node, obj.exceptionReport);
            },
            "AllowedValues": function(node, parameter) {
                parameter.allowedValues = {};
                this.readChildNodes(node, parameter.allowedValues);
            },
            "AnyValue": function(node, parameter) {
                parameter.anyValue = true;
            },
            "DataType": function(node, parameter) {
                parameter.dataType = this.getChildValue(node);
            },
            "Range": function(node, allowedValues) {
                allowedValues.range = {};
                this.readChildNodes(node, allowedValues.range);
            },
            "MinimumValue": function(node, range) {
                range.minValue = this.getChildValue(node);
            },
            "MaximumValue": function(node, range) {
                range.maxValue = this.getChildValue(node);
            },
            "Identifier": function(node, obj) {
                obj.identifier = this.getChildValue(node);
            },
            "SupportedCRS": function(node, obj) {
                obj.supportedCRS = this.getChildValue(node);
            }
        }, OpenLayers.Format.OWSCommon.v1.prototype.readers["ows"])
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "ows": OpenLayers.Util.applyDefaults({
            "Range": function(range) {
                var node = this.createElementNSPlus("ows:Range", {
                    attributes: {
                        'ows:rangeClosure': range.closure
                    }
                });
                this.writeNode("ows:MinimumValue", range.minValue, node);
                this.writeNode("ows:MaximumValue", range.maxValue, node);
                return node;
            },
            "MinimumValue": function(minValue) {
                var node = this.createElementNSPlus("ows:MinimumValue", {
                    value: minValue
                });
                return node;
            },
            "MaximumValue": function(maxValue) {
                var node = this.createElementNSPlus("ows:MaximumValue", {
                    value: maxValue
                });
                return node;
            },
            "Value": function(value) {
                var node = this.createElementNSPlus("ows:Value", {
                    value: value
                });
                return node;
            }
        }, OpenLayers.Format.OWSCommon.v1.prototype.writers["ows"])
    },

    CLASS_NAME: "OpenLayers.Format.OWSCommon.v1_1_0"

});
/* ======================================================================
    OpenLayers/Format/WCSGetCoverage.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/OWSCommon/v1_1_0.js
 */

/**
 * Class: OpenLayers.Format.WCSGetCoverage version 1.1.0
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WCSGetCoverage = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows/1.1",
        wcs: "http://www.opengis.net/wcs/1.1",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Constant: VERSION
     * {String} 1.1.2
     */
    VERSION: "1.1.2",

    /**
     * Property: schemaLocation
     * {String} Schema location
     */
    schemaLocation: "http://www.opengis.net/wcs/1.1 http://schemas.opengis.net/wcs/1.1/wcsGetCoverage.xsd",

    /**
     * Constructor: OpenLayers.Format.WCSGetCoverage
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Method: write
     *
     * Parameters:
     * options - {Object} Optional object.
     *
     * Returns:
     * {String} A WCS GetCoverage request XML string.
     */
    write: function(options) {
        var node = this.writeNode("wcs:GetCoverage", options);
        this.setAttributeNS(
            node, this.namespaces.xsi,
            "xsi:schemaLocation", this.schemaLocation
        );
        return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
    }, 

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "wcs": {
            "GetCoverage": function(options) {
                var node = this.createElementNSPlus("wcs:GetCoverage", {
                    attributes: {
                        version: options.version || this.VERSION,
                        service: 'WCS'
                    } 
                }); 
                this.writeNode("ows:Identifier", options.identifier, node);
                this.writeNode("wcs:DomainSubset", options.domainSubset, node);
                this.writeNode("wcs:Output", options.output, node);
                return node; 
            },
            "DomainSubset": function(domainSubset) {
                var node = this.createElementNSPlus("wcs:DomainSubset", {});
                this.writeNode("ows:BoundingBox", domainSubset.boundingBox, node);
                if (domainSubset.temporalSubset) {
                    this.writeNode("wcs:TemporalSubset", domainSubset.temporalSubset, node);
                }
                return node;
            },
            "TemporalSubset": function(temporalSubset) {
                var node = this.createElementNSPlus("wcs:TemporalSubset", {});
                for (var i=0, len=temporalSubset.timePeriods.length; i<len; ++i) {
                    this.writeNode("wcs:TimePeriod", temporalSubset.timePeriods[i], node);
                }
                return node;
            },
            "TimePeriod": function(timePeriod) {
                var node = this.createElementNSPlus("wcs:TimePeriod", {});
                this.writeNode("wcs:BeginPosition", timePeriod.begin, node);
                this.writeNode("wcs:EndPosition", timePeriod.end, node);
                if (timePeriod.resolution) {
                    this.writeNode("wcs:TimeResolution", timePeriod.resolution, node);
                }
                return node;
            },
            "BeginPosition": function(begin) {
                var node = this.createElementNSPlus("wcs:BeginPosition", {
                    value: begin
                });
                return node;
            },
            "EndPosition": function(end) {
                var node = this.createElementNSPlus("wcs:EndPosition", {
                    value: end
                });
                return node;
            },
            "TimeResolution": function(resolution) {
                var node = this.createElementNSPlus("wcs:TimeResolution", {
                    value: resolution
                });
                return node;
            },
            "Output": function(output) {
                var node = this.createElementNSPlus("wcs:Output", {
                    attributes: {
                        format: output.format,
                        store: output.store
                    }
                });
                if (output.gridCRS) {
                    this.writeNode("wcs:GridCRS", output.gridCRS, node);
                }
                return node;
            },
            "GridCRS": function(gridCRS) {
                var node = this.createElementNSPlus("wcs:GridCRS", {});
                this.writeNode("wcs:GridBaseCRS", gridCRS.baseCRS, node);
                if (gridCRS.type) {
                    this.writeNode("wcs:GridType", gridCRS.type, node);
                }
                if (gridCRS.origin) {
                    this.writeNode("wcs:GridOrigin", gridCRS.origin, node);
                }
                this.writeNode("wcs:GridOffsets", gridCRS.offsets, node);
                if (gridCRS.CS) {
                    this.writeNode("wcs:GridCS", gridCRS.CS, node);
                }
                return node;
            },
            "GridBaseCRS": function(baseCRS) {
                return this.createElementNSPlus("wcs:GridBaseCRS", {
                    value: baseCRS
                });
            },
            "GridOrigin": function(origin) {
                return this.createElementNSPlus("wcs:GridOrigin", {
                    value: origin
                });
            },
            "GridType": function(type) {
                return this.createElementNSPlus("wcs:GridType", {
                    value: type
                });
            },
            "GridOffsets": function(offsets) {
                return this.createElementNSPlus("wcs:GridOffsets", {
                    value: offsets
                });
            },
            "GridCS": function(CS) {
                return this.createElementNSPlus("wcs:GridCS", {
                    value: CS
                });
            }
        },
        "ows": OpenLayers.Format.OWSCommon.v1_1_0.prototype.writers.ows
    },
    
    CLASS_NAME: "OpenLayers.Format.WCSGetCoverage" 

});
/* ======================================================================
    OpenLayers/Format/WPSExecute.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/OWSCommon/v1_1_0.js
 * @requires OpenLayers/Format/WCSGetCoverage.js
 * @requires OpenLayers/Format/WFST/v1_1_0.js
 */

/**
 * Class: OpenLayers.Format.WPSExecute version 1.0.0
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WPSExecute = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows/1.1",
        gml: "http://www.opengis.net/gml",
        wps: "http://www.opengis.net/wps/1.0.0",
        wfs: "http://www.opengis.net/wfs",
        ogc: "http://www.opengis.net/ogc",
        wcs: "http://www.opengis.net/wcs",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",

    /**
     * Property: schemaLocation
     * {String} Schema location
     */
    schemaLocation: "http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd",

    schemaLocationAttr: function(options) {
        return undefined;
    },

    /**
     * Constructor: OpenLayers.Format.WPSExecute
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Method: write
     *
     * Parameters:
     * options - {Object} Optional object.
     *
     * Returns:
     * {String} An WPS Execute request XML string.
     */
    write: function(options) {
        var doc;
        if (window.ActiveXObject) {
            doc = new ActiveXObject("Microsoft.XMLDOM");
            this.xmldom = doc;
        } else {
            doc = document.implementation.createDocument("", "", null);
        }
        var node = this.writeNode("wps:Execute", options, doc);
        this.setAttributeNS(
            node, this.namespaces.xsi,
            "xsi:schemaLocation", this.schemaLocation
        );
        return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
    }, 

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "wps": {
            "Execute": function(options) {
                var node = this.createElementNSPlus("wps:Execute", {
                    attributes: {
                        version: this.VERSION,
                        service: 'WPS'
                    } 
                }); 
                this.writeNode("ows:Identifier", options.identifier, node);
                this.writeNode("wps:DataInputs", options.dataInputs, node);
                this.writeNode("wps:ResponseForm", options.responseForm, node);
                return node; 
            },
            "ResponseForm": function(responseForm) {
                var node = this.createElementNSPlus("wps:ResponseForm", {});
                if (responseForm.rawDataOutput) {
                    this.writeNode("wps:RawDataOutput", responseForm.rawDataOutput, node);
                }
                if (responseForm.responseDocument) {
                    this.writeNode("wps:ResponseDocument", responseForm.responseDocument, node);
                }
                return node;
            },
            "ResponseDocument": function(responseDocument) {
                var node = this.createElementNSPlus("wps:ResponseDocument", {
                    attributes: {
                        storeExecuteResponse: responseDocument.storeExecuteResponse,
                        lineage: responseDocument.lineage,
                        status: responseDocument.status
                    }
                });
                if (responseDocument.output) {
                    this.writeNode("wps:Output", responseDocument.output, node);
                }
                return node;
            },
            "Output": function(output) {
                var node = this.createElementNSPlus("wps:Output", {
                    attributes: {
                        asReference: output.asReference
                    }
                });
                this.writeNode("ows:Identifier", output.identifier, node);
                this.writeNode("ows:Title", output.title, node);
                this.writeNode("ows:Abstract", output["abstract"], node);
                return node;
            },
            "RawDataOutput": function(rawDataOutput) {
                var node = this.createElementNSPlus("wps:RawDataOutput", {
                    attributes: {
                        mimeType: rawDataOutput.mimeType
                    }
                });
                this.writeNode("ows:Identifier", rawDataOutput.identifier, node);
                return node;
            },
            "DataInputs": function(dataInputs) {
                var node = this.createElementNSPlus("wps:DataInputs", {});
                for (var i=0, ii=dataInputs.length; i<ii; ++i) {
                    this.writeNode("wps:Input", dataInputs[i], node);
                }
                return node;
            },
            "Input": function(input) {
                var node = this.createElementNSPlus("wps:Input", {});
                this.writeNode("ows:Identifier", input.identifier, node);
                if (input.title) {
                    this.writeNode("ows:Title", input.title, node);
                }
                if (input.data) {
                    this.writeNode("wps:Data", input.data, node);
                }
                if (input.reference) {
                    this.writeNode("wps:Reference", input.reference, node);
                }
                return node;
            },
            "Data": function(data) {
                var node = this.createElementNSPlus("wps:Data", {});
                if (data.literalData) {
                    this.writeNode("wps:LiteralData", data.literalData, node);
                } else if (data.complexData) {
                    this.writeNode("wps:ComplexData", data.complexData, node);
                }
                return node;
            },
            "LiteralData": function(literalData) {
                var node = this.createElementNSPlus("wps:LiteralData", {
                    attributes: {
                        uom: literalData.uom
                    },
                    value: literalData.value
                });
                return node;
            },
            "ComplexData": function(complexData) {
                var node = this.createElementNSPlus("wps:ComplexData", {
                    attributes: {
                        mimeType: complexData.mimeType,
                        encoding: complexData.encoding,
                        schema: complexData.schema
                    } 
                });
                var data = complexData.value;
                if (typeof data === "string") {
                    node.appendChild(
                        this.getXMLDoc().createCDATASection(complexData.value)
                    );
                } else {
                    node.appendChild(data);
                }
                return node;
            },
            "Reference": function(reference) {
                var node = this.createElementNSPlus("wps:Reference", {
                    attributes: {
                        mimeType: reference.mimeType,
                        "xlink:href": reference.href,
                        method: reference.method,
                        encoding: reference.encoding,
                        schema: reference.schema
                    }
                });
                if (reference.body) {
                    this.writeNode("wps:Body", reference.body, node);
                }
                return node;
            },
            "Body": function(body) {
                var node = this.createElementNSPlus("wps:Body", {});
                if (body.wcs) {
                    this.writeNode("wcs:GetCoverage", body.wcs, node);
                }
                else if (body.wfs) {
                    // OpenLayers.Format.WFST expects these to be on the 
                    // instance and not in the options
                    this.featureType = body.wfs.featureType;
                    this.version = body.wfs.version;
                    this.writeNode("wfs:GetFeature", body.wfs, node);
                } else {
                    this.writeNode("wps:Execute", body, node);
                }
                return node;                
            }
        },
        "wcs": OpenLayers.Format.WCSGetCoverage.prototype.writers.wcs,
        "wfs": OpenLayers.Format.WFST.v1_1_0.prototype.writers.wfs,
        "ogc": OpenLayers.Format.Filter.v1_1_0.prototype.writers.ogc,
        "ows": OpenLayers.Format.OWSCommon.v1_1_0.prototype.writers.ows
    },
    
    CLASS_NAME: "OpenLayers.Format.WPSExecute" 

});
/* ======================================================================
    OpenLayers/Control/PanZoom.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Events/buttonclick.js
 */

/**
 * Class: OpenLayers.Control.PanZoom
 * The PanZoom is a visible control, composed of a
 * <OpenLayers.Control.PanPanel> and a <OpenLayers.Control.ZoomPanel>. By
 * default it is drawn in the upper left corner of the map.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.PanZoom = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: slideFactor
     * {Integer} Number of pixels by which we'll pan the map in any direction 
     *     on clicking the arrow buttons.  If you want to pan by some ratio
     *     of the map dimensions, use <slideRatio> instead.
     */
    slideFactor: 50,

    /** 
     * APIProperty: slideRatio
     * {Number} The fraction of map width/height by which we'll pan the map            
     *     on clicking the arrow buttons.  Default is null.  If set, will
     *     override <slideFactor>. E.g. if slideRatio is .5, then the Pan Up
     *     button will pan up half the map height. 
     */
    slideRatio: null,

    /** 
     * Property: buttons
     * {Array(DOMElement)} Array of Button Divs 
     */
    buttons: null,

    /** 
     * Property: position
     * {<OpenLayers.Pixel>} 
     */
    position: null,

    /**
     * Constructor: OpenLayers.Control.PanZoom
     * 
     * Parameters:
     * options - {Object}
     */
    initialize: function(options) {
        this.position = new OpenLayers.Pixel(OpenLayers.Control.PanZoom.X,
                                             OpenLayers.Control.PanZoom.Y);
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
    },

    /**
     * APIMethod: destroy
     */
    destroy: function() {
        if (this.map) {
            this.map.events.unregister("buttonclick", this, this.onButtonClick);
        }
        this.removeButtons();
        this.buttons = null;
        this.position = null;
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },

    /** 
     * Method: setMap
     *
     * Properties:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
        this.map.events.register("buttonclick", this, this.onButtonClick);
    },

    /**
     * Method: draw
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>} 
     * 
     * Returns:
     * {DOMElement} A reference to the container div for the PanZoom control.
     */
    draw: function(px) {
        // initialize our internal div
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        px = this.position;

        // place the controls
        this.buttons = [];

        var sz = {w: 18, h: 18};
        var centered = new OpenLayers.Pixel(px.x+sz.w/2, px.y);

        this._addButton("panup", "north-mini.png", centered, sz);
        px.y = centered.y+sz.h;
        this._addButton("panleft", "west-mini.png", px, sz);
        this._addButton("panright", "east-mini.png", px.add(sz.w, 0), sz);
        this._addButton("pandown", "south-mini.png", 
                        centered.add(0, sz.h*2), sz);
        this._addButton("zoomin", "zoom-plus-mini.png", 
                        centered.add(0, sz.h*3+5), sz);
        this._addButton("zoomworld", "zoom-world-mini.png", 
                        centered.add(0, sz.h*4+5), sz);
        this._addButton("zoomout", "zoom-minus-mini.png", 
                        centered.add(0, sz.h*5+5), sz);
        return this.div;
    },
    
    /**
     * Method: _addButton
     * 
     * Parameters:
     * id - {String} 
     * img - {String} 
     * xy - {<OpenLayers.Pixel>} 
     * sz - {<OpenLayers.Size>} 
     * 
     * Returns:
     * {DOMElement} A Div (an alphaImageDiv, to be precise) that contains the
     *     image of the button, and has all the proper event handlers set.
     */
    _addButton:function(id, img, xy, sz) {
        var imgLocation = OpenLayers.Util.getImageLocation(img);
        var btn = OpenLayers.Util.createAlphaImageDiv(
                                    this.id + "_" + id, 
                                    xy, sz, imgLocation, "absolute");
        btn.style.cursor = "pointer";
        //we want to add the outer div
        this.div.appendChild(btn);
        btn.action = id;
        btn.className = "olButton";
    
        //we want to remember/reference the outer div
        this.buttons.push(btn);
        return btn;
    },
    
    /**
     * Method: _removeButton
     * 
     * Parameters:
     * btn - {Object}
     */
    _removeButton: function(btn) {
        this.div.removeChild(btn);
        OpenLayers.Util.removeItem(this.buttons, btn);
    },
    
    /**
     * Method: removeButtons
     */
    removeButtons: function() {
        for(var i=this.buttons.length-1; i>=0; --i) {
            this._removeButton(this.buttons[i]);
        }
    },
    
    /**
     * Method: onButtonClick
     *
     * Parameters:
     * evt - {Event}
     */
    onButtonClick: function(evt) {
        var btn = evt.buttonElement;
        switch (btn.action) {
            case "panup": 
                this.map.pan(0, -this.getSlideFactor("h"));
                break;
            case "pandown": 
                this.map.pan(0, this.getSlideFactor("h"));
                break;
            case "panleft": 
                this.map.pan(-this.getSlideFactor("w"), 0);
                break;
            case "panright": 
                this.map.pan(this.getSlideFactor("w"), 0);
                break;
            case "zoomin": 
                this.map.zoomIn(); 
                break;
            case "zoomout": 
                this.map.zoomOut(); 
                break;
            case "zoomworld": 
                this.map.zoomToMaxExtent(); 
                break;
        }
    },
    
    /**
     * Method: getSlideFactor
     *
     * Parameters:
     * dim - {String} "w" or "h" (for width or height).
     *
     * Returns:
     * {Number} The slide factor for panning in the requested direction.
     */
    getSlideFactor: function(dim) {
        return this.slideRatio ?
            this.map.getSize()[dim] * this.slideRatio :
            this.slideFactor;
    },

    CLASS_NAME: "OpenLayers.Control.PanZoom"
});

/**
 * Constant: X
 * {Integer}
 */
OpenLayers.Control.PanZoom.X = 4;

/**
 * Constant: Y
 * {Integer}
 */
OpenLayers.Control.PanZoom.Y = 4;
/* ======================================================================
    OpenLayers/Control/PanZoomBar.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control/PanZoom.js
 */

/**
 * Class: OpenLayers.Control.PanZoomBar
 * The PanZoomBar is a visible control composed of a
 * <OpenLayers.Control.PanPanel> and a <OpenLayers.Control.ZoomBar>. 
 * By default it is displayed in the upper left corner of the map as 4
 * directional arrows above a vertical slider.
 *
 * Inherits from:
 *  - <OpenLayers.Control.PanZoom>
 */
OpenLayers.Control.PanZoomBar = OpenLayers.Class(OpenLayers.Control.PanZoom, {

    /** 
     * APIProperty: zoomStopWidth
     */
    zoomStopWidth: 18,

    /** 
     * APIProperty: zoomStopHeight
     */
    zoomStopHeight: 11,

    /** 
     * Property: slider
     */
    slider: null,

    /** 
     * Property: sliderEvents
     * {<OpenLayers.Events>}
     */
    sliderEvents: null,

    /** 
     * Property: zoombarDiv
     * {DOMElement}
     */
    zoombarDiv: null,

    /** 
     * APIProperty: zoomWorldIcon
     * {Boolean}
     */
    zoomWorldIcon: false,

    /**
     * APIProperty: panIcons
     * {Boolean} Set this property to false not to display the pan icons. If
     * false the zoom world icon is placed under the zoom bar. Defaults to
     * true.
     */
    panIcons: true,

    /**
     * APIProperty: forceFixedZoomLevel
     * {Boolean} Force a fixed zoom level even though the map has 
     *     fractionalZoom
     */
    forceFixedZoomLevel: false,

    /**
     * Property: mouseDragStart
     * {<OpenLayers.Pixel>}
     */
    mouseDragStart: null,

    /**
     * Property: deltaY
     * {Number} The cumulative vertical pixel offset during a zoom bar drag.
     */
    deltaY: null,

    /**
     * Property: zoomStart
     * {<OpenLayers.Pixel>}
     */
    zoomStart: null,

    /**
     * Constructor: OpenLayers.Control.PanZoomBar
     */ 

    /**
     * APIMethod: destroy
     */
    destroy: function() {

        this._removeZoomBar();

        this.map.events.un({
            "changebaselayer": this.redraw,
            scope: this
        });

        OpenLayers.Control.PanZoom.prototype.destroy.apply(this, arguments);

        delete this.mouseDragStart;
        delete this.zoomStart;
    },
    
    /**
     * Method: setMap
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.PanZoom.prototype.setMap.apply(this, arguments);
        this.map.events.register("changebaselayer", this, this.redraw);
    },

    /** 
     * Method: redraw
     * clear the div and start over.
     */
    redraw: function() {
        if (this.div != null) {
            this.removeButtons();
            this._removeZoomBar();
        }  
        this.draw();
    },
    
    /**
    * Method: draw 
    *
    * Parameters:
    * px - {<OpenLayers.Pixel>} 
    */
    draw: function(px) {
        // initialize our internal div
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        px = this.position.clone();

        // place the controls
        this.buttons = [];

        var sz = {w: 18, h: 18};
        if (this.panIcons) {
            var centered = new OpenLayers.Pixel(px.x+sz.w/2, px.y);
            var wposition = sz.w;

            if (this.zoomWorldIcon) {
                centered = new OpenLayers.Pixel(px.x+sz.w, px.y);
            }

            this._addButton("panup", "north-mini.png", centered, sz);
            px.y = centered.y+sz.h;
            this._addButton("panleft", "west-mini.png", px, sz);
            if (this.zoomWorldIcon) {
                this._addButton("zoomworld", "zoom-world-mini.png", px.add(sz.w, 0), sz);

                wposition *= 2;
            }
            this._addButton("panright", "east-mini.png", px.add(wposition, 0), sz);
            this._addButton("pandown", "south-mini.png", centered.add(0, sz.h*2), sz);
            this._addButton("zoomin", "zoom-plus-mini.png", centered.add(0, sz.h*3+5), sz);
            centered = this._addZoomBar(centered.add(0, sz.h*4 + 5));
            this._addButton("zoomout", "zoom-minus-mini.png", centered, sz);
        }
        else {
            this._addButton("zoomin", "zoom-plus-mini.png", px, sz);
            centered = this._addZoomBar(px.add(0, sz.h));
            this._addButton("zoomout", "zoom-minus-mini.png", centered, sz);
            if (this.zoomWorldIcon) {
                centered = centered.add(0, sz.h+3);
                this._addButton("zoomworld", "zoom-world-mini.png", centered, sz);
            }
        }
        return this.div;
    },

    /** 
    * Method: _addZoomBar
    * 
    * Parameters:
    * centered - {<OpenLayers.Pixel>} where zoombar drawing is to start.
    */
    _addZoomBar:function(centered) {
        var imgLocation = OpenLayers.Util.getImageLocation("slider.png");
        var id = this.id + "_" + this.map.id;
        var zoomsToEnd = this.map.getNumZoomLevels() - 1 - this.map.getZoom();
        var slider = OpenLayers.Util.createAlphaImageDiv(id,
                       centered.add(-1, zoomsToEnd * this.zoomStopHeight), 
                       {w: 20, h: 9},
                       imgLocation,
                       "absolute");
        slider.style.cursor = "move";
        this.slider = slider;
        
        this.sliderEvents = new OpenLayers.Events(this, slider, null, true,
                                            {includeXY: true});
        this.sliderEvents.on({
            "touchstart": this.zoomBarDown,
            "touchmove": this.zoomBarDrag,
            "touchend": this.zoomBarUp,
            "mousedown": this.zoomBarDown,
            "mousemove": this.zoomBarDrag,
            "mouseup": this.zoomBarUp
        });
        
        var sz = {
            w: this.zoomStopWidth,
            h: this.zoomStopHeight * this.map.getNumZoomLevels()
        };
        var imgLocation = OpenLayers.Util.getImageLocation("zoombar.png");
        var div = null;
        
        if (OpenLayers.Util.alphaHack()) {
            var id = this.id + "_" + this.map.id;
            div = OpenLayers.Util.createAlphaImageDiv(id, centered,
                                      {w: sz.w, h: this.zoomStopHeight},
                                      imgLocation,
                                      "absolute", null, "crop");
            div.style.height = sz.h + "px";
        } else {
            div = OpenLayers.Util.createDiv(
                        'OpenLayers_Control_PanZoomBar_Zoombar' + this.map.id,
                        centered,
                        sz,
                        imgLocation);
        }
        div.style.cursor = "pointer";
        div.className = "olButton";
        this.zoombarDiv = div;
        
        this.div.appendChild(div);

        this.startTop = parseInt(div.style.top);
        this.div.appendChild(slider);

        this.map.events.register("zoomend", this, this.moveZoomBar);

        centered = centered.add(0, 
            this.zoomStopHeight * this.map.getNumZoomLevels());
        return centered; 
    },
    
    /**
     * Method: _removeZoomBar
     */
    _removeZoomBar: function() {
        this.sliderEvents.un({
            "touchstart": this.zoomBarDown,
            "touchmove": this.zoomBarDrag,
            "touchend": this.zoomBarUp,
            "mousedown": this.zoomBarDown,
            "mousemove": this.zoomBarDrag,
            "mouseup": this.zoomBarUp
        });
        this.sliderEvents.destroy();
        
        this.div.removeChild(this.zoombarDiv);
        this.zoombarDiv = null;
        this.div.removeChild(this.slider);
        this.slider = null;
        
        this.map.events.unregister("zoomend", this, this.moveZoomBar);
    },
    
    /**
     * Method: onButtonClick
     *
     * Parameters:
     * evt - {Event}
     */
    onButtonClick: function(evt) {
        OpenLayers.Control.PanZoom.prototype.onButtonClick.apply(this, arguments);
        if (evt.buttonElement === this.zoombarDiv) {
            var levels = evt.buttonXY.y / this.zoomStopHeight;
            if(this.forceFixedZoomLevel || !this.map.fractionalZoom) {
                levels = Math.floor(levels);
            }    
            var zoom = (this.map.getNumZoomLevels() - 1) - levels; 
            zoom = Math.min(Math.max(zoom, 0), this.map.getNumZoomLevels() - 1);
            this.map.zoomTo(zoom);
        }
    },
    
    /**
     * Method: passEventToSlider
     * This function is used to pass events that happen on the div, or the map,
     * through to the slider, which then does its moving thing.
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    passEventToSlider:function(evt) {
        this.sliderEvents.handleBrowserEvent(evt);
    },
    
    /*
     * Method: zoomBarDown
     * event listener for clicks on the slider
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    zoomBarDown:function(evt) {
        if (!OpenLayers.Event.isLeftClick(evt) && !OpenLayers.Event.isSingleTouch(evt)) {
            return;
        }
        this.map.events.on({
            "touchmove": this.passEventToSlider,
            "mousemove": this.passEventToSlider,
            "mouseup": this.passEventToSlider,
            scope: this
        });
        this.mouseDragStart = evt.xy.clone();
        this.zoomStart = evt.xy.clone();
        this.div.style.cursor = "move";
        // reset the div offsets just in case the div moved
        this.zoombarDiv.offsets = null; 
        OpenLayers.Event.stop(evt);
    },
    
    /*
     * Method: zoomBarDrag
     * This is what happens when a click has occurred, and the client is
     * dragging.  Here we must ensure that the slider doesn't go beyond the
     * bottom/top of the zoombar div, as well as moving the slider to its new
     * visual location
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    zoomBarDrag:function(evt) {
        if (this.mouseDragStart != null) {
            var deltaY = this.mouseDragStart.y - evt.xy.y;
            var offsets = OpenLayers.Util.pagePosition(this.zoombarDiv);
            if ((evt.clientY - offsets[1]) > 0 && 
                (evt.clientY - offsets[1]) < parseInt(this.zoombarDiv.style.height) - 2) {
                var newTop = parseInt(this.slider.style.top) - deltaY;
                this.slider.style.top = newTop+"px";
                this.mouseDragStart = evt.xy.clone();
            }
            // set cumulative displacement
            this.deltaY = this.zoomStart.y - evt.xy.y;
            OpenLayers.Event.stop(evt);
        }
    },
    
    /*
     * Method: zoomBarUp
     * Perform cleanup when a mouseup event is received -- discover new zoom
     * level and switch to it.
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    zoomBarUp:function(evt) {
        if (!OpenLayers.Event.isLeftClick(evt) && evt.type !== "touchend") {
            return;
        }
        if (this.mouseDragStart) {
            this.div.style.cursor="";
            this.map.events.un({
                "touchmove": this.passEventToSlider,
                "mouseup": this.passEventToSlider,
                "mousemove": this.passEventToSlider,
                scope: this
            });
            var zoomLevel = this.map.zoom;
            if (!this.forceFixedZoomLevel && this.map.fractionalZoom) {
                zoomLevel += this.deltaY/this.zoomStopHeight;
                zoomLevel = Math.min(Math.max(zoomLevel, 0), 
                                     this.map.getNumZoomLevels() - 1);
            } else {
                zoomLevel += this.deltaY/this.zoomStopHeight;
                zoomLevel = Math.max(Math.round(zoomLevel), 0);      
            }
            this.map.zoomTo(zoomLevel);
            this.mouseDragStart = null;
            this.zoomStart = null;
            this.deltaY = 0;
            OpenLayers.Event.stop(evt);
        }
    },
    
    /*
    * Method: moveZoomBar
    * Change the location of the slider to match the current zoom level.
    */
    moveZoomBar:function() {
        var newTop = 
            ((this.map.getNumZoomLevels()-1) - this.map.getZoom()) * 
            this.zoomStopHeight + this.startTop + 1;
        this.slider.style.top = newTop + "px";
    },    
    
    CLASS_NAME: "OpenLayers.Control.PanZoomBar"
});
/* ======================================================================
    OpenLayers/Format/WFSCapabilities.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */

/**
 * Class: OpenLayers.Format.WFSCapabilities
 * Read WFS Capabilities.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.WFSCapabilities = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.1.0".
     */
    defaultVersion: "1.1.0",
 
    /**
     * APIProperty: errorProperty
     * {String} Which property of the returned object to check for in order to
     * determine whether or not parsing has failed. In the case that the
     * errorProperty is undefined on the returned object, the document will be
     * run through an OGCExceptionReport parser.
     */
    errorProperty: "service",

    /**
     * Constructor: OpenLayers.Format.WFSCapabilities
     * Create a new parser for WFS capabilities.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return a list of layers. 
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} List of named layers.
     */
    
    CLASS_NAME: "OpenLayers.Format.WFSCapabilities" 

});
/* ======================================================================
    OpenLayers/Format/WFSCapabilities/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WFSCapabilities.js
 */

/**
 * Class: OpenLayers.Format.WFSCapabilities.v1
 * Abstract class not to be instantiated directly.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WFSCapabilities.v1 = OpenLayers.Class(
    OpenLayers.Format.XML, {

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        wfs: "http://www.opengis.net/wfs",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance",
        ows: "http://www.opengis.net/ows"
    },

    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "wfs",
    
    /**
     * Constructor: OpenLayers.Format.WFSCapabilities.v1_1
     * Create an instance of one of the subclasses.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return a list of layers. 
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} List of named layers.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var raw = data;
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var capabilities = {};
        this.readNode(data, capabilities);
        return capabilities;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wfs": {
            "WFS_Capabilities": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "FeatureTypeList": function(node, request) {
                request.featureTypeList = {
                    featureTypes: []
                };
                this.readChildNodes(node, request.featureTypeList);
            },
            "FeatureType": function(node, featureTypeList) {
                var featureType = {};
                this.readChildNodes(node, featureType);
                featureTypeList.featureTypes.push(featureType);
            },
            "Name": function(node, obj) {
                var name = this.getChildValue(node);
                if(name) {
                    var parts = name.split(":");
                    obj.name = parts.pop();
                    if(parts.length > 0) {
                        obj.featureNS = this.lookupNamespaceURI(node, parts[0]);
                    }
                }
            },
            "Title": function(node, obj) {
                var title = this.getChildValue(node);
                if(title) {
                    obj.title = title;
                }
            },
            "Abstract": function(node, obj) {
                var abst = this.getChildValue(node);
                if(abst) {
                    obj["abstract"] = abst;
                }
            }
        }
    },

    CLASS_NAME: "OpenLayers.Format.WFSCapabilities.v1" 

});
/* ======================================================================
    OpenLayers/Format/WFSCapabilities/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WFSCapabilities/v1.js
 * @requires OpenLayers/Format/OWSCommon/v1.js
 */

/**
 * Class: OpenLayers.Format.WFSCapabilities/v1_1_0
 * Read WFS Capabilities version 1.1.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WFSCapabilities>
 */
OpenLayers.Format.WFSCapabilities.v1_1_0 = OpenLayers.Class(
    OpenLayers.Format.WFSCapabilities.v1, {

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },
    
    /**
     * Constructor: OpenLayers.Format.WFSCapabilities.v1_1_0
     * Create a new parser for WFS capabilities version 1.1.0.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wfs": OpenLayers.Util.applyDefaults({
            "DefaultSRS": function(node, obj) {
                var defaultSRS = this.getChildValue(node);
                if (defaultSRS) {
                    obj.srs = defaultSRS;
                }
            }
        }, OpenLayers.Format.WFSCapabilities.v1.prototype.readers["wfs"]),
        "ows": OpenLayers.Format.OWSCommon.v1.prototype.readers.ows
    },

    CLASS_NAME: "OpenLayers.Format.WFSCapabilities.v1_1_0" 

});
/* ======================================================================
    OpenLayers/Layer/Image.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */
 
/**
 * @requires OpenLayers/Layer.js
 * @requires OpenLayers/Tile/Image.js
 */

/**
 * Class: OpenLayers.Layer.Image
 * Instances of OpenLayers.Layer.Image are used to display data from a web
 * accessible image as a map layer.  Create a new image layer with the
 * <OpenLayers.Layer.Image> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Layer>
 */
OpenLayers.Layer.Image = OpenLayers.Class(OpenLayers.Layer, {

    /**
     * Property: isBaseLayer
     * {Boolean} The layer is a base layer.  Default is true.  Set this property
     * in the layer options
     */
    isBaseLayer: true,
    
    /**
     * Property: url
     * {String} URL of the image to use
     */
    url: null,

    /**
     * Property: extent
     * {<OpenLayers.Bounds>} The image bounds in map units.  This extent will
     *     also be used as the default maxExtent for the layer.  If you wish
     *     to have a maxExtent that is different than the image extent, set the
     *     maxExtent property of the options argument (as with any other layer).
     */
    extent: null,
    
    /**
     * Property: size
     * {<OpenLayers.Size>} The image size in pixels
     */
    size: null,

    /**
     * Property: tile
     * {<OpenLayers.Tile.Image>}
     */
    tile: null,

    /**
     * Property: aspectRatio
     * {Float} The ratio of height/width represented by a single pixel in the
     * graphic
     */
    aspectRatio: null,

    /**
     * Constructor: OpenLayers.Layer.Image
     * Create a new image layer
     *
     * Parameters:
     * name - {String} A name for the layer.
     * url - {String} Relative or absolute path to the image
     * extent - {<OpenLayers.Bounds>} The extent represented by the image
     * size - {<OpenLayers.Size>} The size (in pixels) of the image
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, url, extent, size, options) {
        this.url = url;
        this.extent = extent;
        this.maxExtent = extent;
        this.size = size;
        OpenLayers.Layer.prototype.initialize.apply(this, [name, options]);

        this.aspectRatio = (this.extent.getHeight() / this.size.h) /
                           (this.extent.getWidth() / this.size.w);
    },    

    /**
     * Method: destroy
     * Destroy this layer
     */
    destroy: function() {
        if (this.tile) {
            this.removeTileMonitoringHooks(this.tile);
            this.tile.destroy();
            this.tile = null;
        }
        OpenLayers.Layer.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Paramters:
     * obj - {Object} An optional layer (is this ever used?)
     *
     * Returns:
     * {<OpenLayers.Layer.Image>} An exact copy of this layer
     */
    clone: function(obj) {
        
        if(obj == null) {
            obj = new OpenLayers.Layer.Image(this.name,
                                               this.url,
                                               this.extent,
                                               this.size,
                                               this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },    
    
    /**
     * APIMethod: setMap
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        /**
         * If nothing to do with resolutions has been set, assume a single
         * resolution determined by ratio*extent/size - if an image has a
         * pixel aspect ratio different than one (as calculated above), the
         * image will be stretched in one dimension only.
         */
        if( this.options.maxResolution == null ) {
            this.options.maxResolution = this.aspectRatio *
                                         this.extent.getWidth() /
                                         this.size.w;
        }
        OpenLayers.Layer.prototype.setMap.apply(this, arguments);
    },

    /** 
     * Method: moveTo
     * Create the tile for the image or resize it for the new resolution
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * zoomChanged - {Boolean}
     * dragging - {Boolean}
     */
    moveTo:function(bounds, zoomChanged, dragging) {
        OpenLayers.Layer.prototype.moveTo.apply(this, arguments);

        var firstRendering = (this.tile == null);

        if(zoomChanged || firstRendering) {

            //determine new tile size
            this.setTileSize();

            //determine new position (upper left corner of new bounds)
            var ulPx = this.map.getLayerPxFromLonLat({
                lon: this.extent.left,
                lat: this.extent.top
            });

            if(firstRendering) {
                //create the new tile
                this.tile = new OpenLayers.Tile.Image(this, ulPx, this.extent, 
                                                      null, this.tileSize);
                this.addTileMonitoringHooks(this.tile);
            } else {
                //just resize the tile and set it's new position
                this.tile.size = this.tileSize.clone();
                this.tile.position = ulPx.clone();
            }
            this.tile.draw();
        }
    }, 

    /**
     * Set the tile size based on the map size.
     */
    setTileSize: function() {
        var tileWidth = this.extent.getWidth() / this.map.getResolution();
        var tileHeight = this.extent.getHeight() / this.map.getResolution();
        this.tileSize = new OpenLayers.Size(tileWidth, tileHeight);
    },

    /** 
     * Method: addTileMonitoringHooks
     * This function takes a tile as input and adds the appropriate hooks to 
     *     the tile so that the layer can keep track of the loading tiles.
     * 
     * Parameters: 
     * tile - {<OpenLayers.Tile>}
     */
    addTileMonitoringHooks: function(tile) {
        tile.onLoadStart = function() {
            this.events.triggerEvent("loadstart");
        };
        tile.events.register("loadstart", this, tile.onLoadStart);
      
        tile.onLoadEnd = function() {
            this.events.triggerEvent("loadend");
        };
        tile.events.register("loadend", this, tile.onLoadEnd);
        tile.events.register("unload", this, tile.onLoadEnd);
    },

    /** 
     * Method: removeTileMonitoringHooks
     * This function takes a tile as input and removes the tile hooks 
     *     that were added in <addTileMonitoringHooks>.
     * 
     * Parameters: 
     * tile - {<OpenLayers.Tile>}
     */
    removeTileMonitoringHooks: function(tile) {
        tile.unload();
        tile.events.un({
            "loadstart": tile.onLoadStart,
            "loadend": tile.onLoadEnd,
            "unload": tile.onLoadEnd,
            scope: this
        });
    },
    
    /**
     * APIMethod: setUrl
     * 
     * Parameters:
     * newUrl - {String}
     */
    setUrl: function(newUrl) {
        this.url = newUrl;
        this.tile.draw();
    },

    /** 
     * APIMethod: getURL
     * The url we return is always the same (the image itself never changes)
     *     so we can ignore the bounds parameter (it will always be the same, 
     *     anyways) 
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     */
    getURL: function(bounds) {
        return this.url;
    },

    CLASS_NAME: "OpenLayers.Layer.Image"
});
/* ======================================================================
    OpenLayers/Strategy.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Strategy
 * Abstract vector layer strategy class.  Not to be instantiated directly.  Use
 *     one of the strategy subclasses instead.
 */
OpenLayers.Strategy = OpenLayers.Class({
    
    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>} The layer this strategy belongs to.
     */
    layer: null,
    
    /**
     * Property: options
     * {Object} Any options sent to the constructor.
     */
    options: null,

    /** 
     * Property: active 
     * {Boolean} The control is active.
     */
    active: null,

    /**
     * Property: autoActivate
     * {Boolean} The creator of the strategy can set autoActivate to false
     *      to fully control when the protocol is activated and deactivated.
     *      Defaults to true.
     */
    autoActivate: true,

    /**
     * Property: autoDestroy
     * {Boolean} The creator of the strategy can set autoDestroy to false
     *      to fully control when the strategy is destroyed. Defaults to
     *      true.
     */
    autoDestroy: true,

    /**
     * Constructor: OpenLayers.Strategy
     * Abstract class for vector strategies.  Create instances of a subclass.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    initialize: function(options) {
        OpenLayers.Util.extend(this, options);
        this.options = options;
        // set the active property here, so that user cannot override it
        this.active = false;
    },
    
    /**
     * APIMethod: destroy
     * Clean up the strategy.
     */
    destroy: function() {
        this.deactivate();
        this.layer = null;
        this.options = null;
    },

    /**
     * Method: setLayer
     * Called to set the <layer> property.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>}
     */
    setLayer: function(layer) {
        this.layer = layer;
    },
    
    /**
     * Method: activate
     * Activate the strategy.  Register any listeners, do appropriate setup.
     *
     * Returns:
     * {Boolean} True if the strategy was successfully activated or false if
     *      the strategy was already active.
     */
    activate: function() {
        if (!this.active) {
            this.active = true;
            return true;
        }
        return false;
    },
    
    /**
     * Method: deactivate
     * Deactivate the strategy.  Unregister any listeners, do appropriate
     *     tear-down.
     *
     * Returns:
     * {Boolean} True if the strategy was successfully deactivated or false if
     *      the strategy was already inactive.
     */
    deactivate: function() {
        if (this.active) {
            this.active = false;
            return true;
        }
        return false;
    },
   
    CLASS_NAME: "OpenLayers.Strategy" 
});
/* ======================================================================
    OpenLayers/Strategy/Save.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 */

/**
 * Class: OpenLayers.Strategy.Save
 * A strategy that commits newly created or modified features.  By default
 *     the strategy waits for a call to <save> before persisting changes.  By
 *     configuring the strategy with the <auto> option, changes can be saved
 *     automatically.
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.Save = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * APIProperty: events
     * {<OpenLayers.Events>} An events object that handles all 
     *     events on the strategy object.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * strategy.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types:
     * start - Triggered before saving
     * success - Triggered after a successful transaction
     * fail - Triggered after a failed transaction
     * 
     */
 
    /** 
     * Property: events
     * {<OpenLayers.Events>} Events instance for triggering this protocol
     *    events.
     */
    events: null,
    
    /**
     * APIProperty: auto
     * {Boolean | Number} Auto-save.  Default is false.  If true, features will be
     *     saved immediately after being added to the layer and with each
     *     modification or deletion.  If auto is a number, features will be
     *     saved on an interval provided by the value (in seconds).
     */
    auto: false,
    
    /**
     * Property: timer
     * {Number} The id of the timer.
     */
    timer: null,

    /**
     * Constructor: OpenLayers.Strategy.Save
     * Create a new Save strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    initialize: function(options) {
        OpenLayers.Strategy.prototype.initialize.apply(this, [options]);
        this.events = new OpenLayers.Events(this);
    },
   
    /**
     * APIMethod: activate
     * Activate the strategy.  Register any listeners, do appropriate setup.
     * 
     * Returns:
     * {Boolean} The strategy was successfully activated.
     */
    activate: function() {
        var activated = OpenLayers.Strategy.prototype.activate.call(this);
        if(activated) {
            if(this.auto) {
                if(typeof this.auto === "number") {
                    this.timer = window.setInterval(
                        OpenLayers.Function.bind(this.save, this),
                        this.auto * 1000
                    );
                } else {
                    this.layer.events.on({
                        "featureadded": this.triggerSave,
                        "afterfeaturemodified": this.triggerSave,
                        scope: this
                    });
                }
            }
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the strategy.  Unregister any listeners, do appropriate
     *     tear-down.
     * 
     * Returns:
     * {Boolean} The strategy was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
        if(deactivated) {
            if(this.auto) {
                if(typeof this.auto === "number") {
                    window.clearInterval(this.timer);
                } else {
                    this.layer.events.un({
                        "featureadded": this.triggerSave,
                        "afterfeaturemodified": this.triggerSave,
                        scope: this
                    });
                }
            }
        }
        return deactivated;
    },
    
    /**
     * Method: triggerSave
     * Registered as a listener.  Calls save if a feature has insert, update,
     *     or delete state.
     *
     * Parameters:
     * event - {Object} The event this function is listening for.
     */
    triggerSave: function(event) {
        var feature = event.feature;
        if(feature.state === OpenLayers.State.INSERT ||
           feature.state === OpenLayers.State.UPDATE ||
           feature.state === OpenLayers.State.DELETE) {
            this.save([event.feature]);
        }
    },
    
    /**
     * APIMethod: save
     * Tell the layer protocol to commit unsaved features.  If the layer
     *     projection differs from the map projection, features will be
     *     transformed into the layer projection before being committed.
     *
     * Parameters:
     * features - {Array} Features to be saved.  If null, then default is all
     *     features in the layer.  Features are assumed to be in the map
     *     projection.
     */
    save: function(features) {
        if(!features) {
            features = this.layer.features;
        }
        this.events.triggerEvent("start", {features:features});
        var remote = this.layer.projection;
        var local = this.layer.map.getProjectionObject();
        if(!local.equals(remote)) {
            var len = features.length;
            var clones = new Array(len);
            var orig, clone;
            for(var i=0; i<len; ++i) {
                orig = features[i];
                clone = orig.clone();
                clone.fid = orig.fid;
                clone.state = orig.state;
                if(orig.url) {
                    clone.url = orig.url;
                }
                clone._original = orig;
                clone.geometry.transform(local, remote);
                clones[i] = clone;
            }
            features = clones;
        }
        this.layer.protocol.commit(features, {
            callback: this.onCommit,
            scope: this
        });
    },
    
    /**
     * Method: onCommit
     * Called after protocol commit.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} A response object.
     */
    onCommit: function(response) {
        var evt = {"response": response};
        if(response.success()) {
            var features = response.reqFeatures;
            // deal with inserts, updates, and deletes
            var state, feature;
            var destroys = [];
            var insertIds = response.insertIds || [];
            var j = 0;
            for(var i=0, len=features.length; i<len; ++i) {
                feature = features[i];
                // if projection was different, we may be dealing with clones
                feature = feature._original || feature;
                state = feature.state;
                if(state) {
                    if(state == OpenLayers.State.DELETE) {
                        destroys.push(feature);
                    } else if(state == OpenLayers.State.INSERT) {
                        feature.fid = insertIds[j];
                        ++j;
                    }
                    feature.state = null;
                }
            }

            if(destroys.length > 0) {
                this.layer.destroyFeatures(destroys);
            }

            this.events.triggerEvent("success", evt);

        } else {
            this.events.triggerEvent("fail", evt);
        }
    },
   
    CLASS_NAME: "OpenLayers.Strategy.Save" 
});
/* ======================================================================
    OpenLayers/Format/GPX.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Projection.js
 */

/**
 * Class: OpenLayers.Format.GPX
 * Read/write GPX parser. Create a new instance with the 
 *     <OpenLayers.Format.GPX> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.GPX = OpenLayers.Class(OpenLayers.Format.XML, {
    

    /** 
     * APIProperty: defaultDesc
     * {String} Default description for the waypoints/tracks in the case
     *     where the feature has no "description" attribute.
     *     Default is "No description available".
     */
    defaultDesc: "No description available",

   /**
    * APIProperty: extractWaypoints
    * {Boolean} Extract waypoints from GPX. (default: true)
    */
    extractWaypoints: true,
    
   /**
    * APIProperty: extractTracks
    * {Boolean} Extract tracks from GPX. (default: true)
    */
    extractTracks: true,
    
   /**
    * APIProperty: extractRoutes
    * {Boolean} Extract routes from GPX. (default: true)
    */
    extractRoutes: true,
    
    /**
     * APIProperty: extractAttributes
     * {Boolean} Extract feature attributes from GPX. (default: true)
     *     NOTE: Attributes as part of extensions to the GPX standard may not
     *     be extracted.
     */
    extractAttributes: true,

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        gpx: "http://www.topografix.com/GPX/1/1",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: schemaLocation
     * {String} Schema location. Defaults to
     *  "http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd"
     */
    schemaLocation: "http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd",

    /**
     * APIProperty: creator
     * {String} The creator attribute to be added to the written GPX files.
     * Defaults to "OpenLayers"
     */
    creator: "OpenLayers",
    
    /**
     * Constructor: OpenLayers.Format.GPX
     * Create a new parser for GPX.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        // GPX coordinates are always in longlat WGS84
        this.externalProjection = new OpenLayers.Projection("EPSG:4326");

        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * APIMethod: read
     * Return a list of features from a GPX doc
     *
     * Parameters:
     * doc - {Element} 
     *
     * Returns:
     * Array({<OpenLayers.Feature.Vector>})
     */
    read: function(doc) {
        if (typeof doc == "string") { 
            doc = OpenLayers.Format.XML.prototype.read.apply(this, [doc]);
        }
        var features = [];
        
        if(this.extractTracks) {
            var tracks = doc.getElementsByTagName("trk");
            for (var i=0, len=tracks.length; i<len; i++) {
                // Attributes are only in trk nodes, not trkseg nodes
                var attrs = {};
                if(this.extractAttributes) {
                    attrs = this.parseAttributes(tracks[i]);
                }
                
                var segs = this.getElementsByTagNameNS(tracks[i], tracks[i].namespaceURI, "trkseg");
                for (var j = 0, seglen = segs.length; j < seglen; j++) {
                    // We don't yet support extraction of trkpt attributes
                    // All trksegs of a trk get that trk's attributes
                    var track = this.extractSegment(segs[j], "trkpt");
                    features.push(new OpenLayers.Feature.Vector(track, attrs));
                }
            }
        }
        
        if(this.extractRoutes) {
            var routes = doc.getElementsByTagName("rte");
            for (var k=0, klen=routes.length; k<klen; k++) {
                var attrs = {};
                if(this.extractAttributes) {
                    attrs = this.parseAttributes(routes[k]);
                }
                var route = this.extractSegment(routes[k], "rtept");
                features.push(new OpenLayers.Feature.Vector(route, attrs));
            }
        }
        
        if(this.extractWaypoints) {
            var waypoints = doc.getElementsByTagName("wpt");
            for (var l = 0, len = waypoints.length; l < len; l++) {
                var attrs = {};
                if(this.extractAttributes) {
                    attrs = this.parseAttributes(waypoints[l]);
                }
                var wpt = new OpenLayers.Geometry.Point(waypoints[l].getAttribute("lon"), waypoints[l].getAttribute("lat"));
                features.push(new OpenLayers.Feature.Vector(wpt, attrs));
            }
        }
        
        if (this.internalProjection && this.externalProjection) {
            for (var g = 0, featLength = features.length; g < featLength; g++) {
                features[g].geometry.transform(this.externalProjection,
                                    this.internalProjection);
            }
        }
        
        return features;
    },
    
   /**
    * Method: extractSegment
    *
    * Parameters:
    * segment - {DOMElement} a trkseg or rte node to parse
    * segmentType - {String} nodeName of waypoints that form the line
    *
    * Returns:
    * {<OpenLayers.Geometry.LineString>} A linestring geometry
    */
    extractSegment: function(segment, segmentType) {
        var points = this.getElementsByTagNameNS(segment, segment.namespaceURI, segmentType);
        var point_features = [];
        for (var i = 0, len = points.length; i < len; i++) {
            point_features.push(new OpenLayers.Geometry.Point(points[i].getAttribute("lon"), points[i].getAttribute("lat")));
        }
        return new OpenLayers.Geometry.LineString(point_features);
    },
    
    /**
     * Method: parseAttributes
     *
     * Parameters:
     * node - {<DOMElement>}
     *
     * Returns:
     * {Object} An attributes object.
     */
    parseAttributes: function(node) {
        // node is either a wpt, trk or rte
        // attributes are children of the form <attr>value</attr>
        var attributes = {};
        var attrNode = node.firstChild, value, name;
        while(attrNode) {
            if(attrNode.nodeType == 1 && attrNode.firstChild) {
                value = attrNode.firstChild;
                if(value.nodeType == 3 || value.nodeType == 4) {
                    name = (attrNode.prefix) ?
                        attrNode.nodeName.split(":")[1] :
                        attrNode.nodeName;
                    if(name != "trkseg" && name != "rtept") {
                        attributes[name] = value.nodeValue;
                    }
                }
            }
            attrNode = attrNode.nextSibling;
        }
        return attributes;
    },

    /**
     * APIMethod: write
     * Accepts Feature Collection, and returns a string. 
     * 
     * Parameters: 
     * features - {Array(<OpenLayers.Feature.Vector>)} List of features to serialize into a string.
     * metadata - {Object} A key/value pairs object to build a metadata node to
     *      add to the gpx. Supported keys are 'name', 'desc', 'author'.
     */
    write: function(features, metadata) {
        features = OpenLayers.Util.isArray(features) ?
            features : [features];
        var gpx = this.createElementNS(this.namespaces.gpx, "gpx");
        gpx.setAttribute("version", "1.1");
        gpx.setAttribute("creator", this.creator);
        this.setAttributes(gpx, {
            "xsi:schemaLocation": this.schemaLocation
        });

        if (metadata && typeof metadata == 'object') {
            gpx.appendChild(this.buildMetadataNode(metadata));
        }
        for(var i=0, len=features.length; i<len; i++) {
            gpx.appendChild(this.buildFeatureNode(features[i]));
        }
        return OpenLayers.Format.XML.prototype.write.apply(this, [gpx]);
    },

    /**
     * Method: buildMetadataNode
     * Creates a "metadata" node.
     *
     * Returns:
     * {DOMElement}
     */
    buildMetadataNode: function(metadata) {
        var types = ['name', 'desc', 'author'],
            node = this.createElementNSPlus('gpx:metadata');
        for (var i=0; i < types.length; i++) {
            var type = types[i];
            if (metadata[type]) {
                var n = this.createElementNSPlus("gpx:" + type);
                n.appendChild(this.createTextNode(metadata[type]));
                node.appendChild(n);
            }
        }
        return node;
    },

    /**
     * Method: buildFeatureNode
     * Accepts an <OpenLayers.Feature.Vector>, and builds a node for it.
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     *
     * Returns:
     * {DOMElement} - The created node, either a 'wpt' or a 'trk'.
     */
    buildFeatureNode: function(feature) {
        var geometry = feature.geometry;
            geometry = geometry.clone();
        if (this.internalProjection && this.externalProjection) {
            geometry.transform(this.internalProjection, 
                               this.externalProjection);
        }
        if (geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
            var wpt = this.buildWptNode(geometry);
            this.appendAttributesNode(wpt, feature);
            return wpt;
        } else {
            var trkNode = this.createElementNSPlus("gpx:trk");
            this.appendAttributesNode(trkNode, feature);
            var trkSegNodes = this.buildTrkSegNode(geometry);
            trkSegNodes = OpenLayers.Util.isArray(trkSegNodes) ?
                trkSegNodes : [trkSegNodes];
            for (var i = 0, len = trkSegNodes.length; i < len; i++) {
                trkNode.appendChild(trkSegNodes[i]);
            }
            return trkNode;
        }
    },

    /**
     * Method: buildTrkSegNode
     * Builds trkseg node(s) given a geometry
     *
     * Parameters:
     * trknode
     * geometry - {<OpenLayers.Geometry>}
     */
    buildTrkSegNode: function(geometry) {
        var node,
            i,
            len,
            point,
            nodes;
        if (geometry.CLASS_NAME == "OpenLayers.Geometry.LineString" ||
            geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
            node = this.createElementNSPlus("gpx:trkseg");
            for (i = 0, len=geometry.components.length; i < len; i++) {
                point = geometry.components[i];
                node.appendChild(this.buildTrkPtNode(point));
            }
            return node;
        } else {
            nodes = [];
            for (i = 0, len = geometry.components.length; i < len; i++) {
                nodes.push(this.buildTrkSegNode(geometry.components[i]));
            }
            return nodes;
        }
    },
    
    /**
     * Method: buildTrkPtNode
     * Builds a trkpt node given a point 
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     *
     * Returns:
     * {DOMElement} A trkpt node
     */
    buildTrkPtNode: function(point) {
        var node = this.createElementNSPlus("gpx:trkpt");
        node.setAttribute("lon", point.x);
        node.setAttribute("lat", point.y);
        return node;
    },

    /**
     * Method: buildWptNode
     * Builds a wpt node given a point
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry.Point>}
     *
     * Returns:
     * {DOMElement} A wpt node
     */
    buildWptNode: function(geometry) {
        var node = this.createElementNSPlus("gpx:wpt");
        node.setAttribute("lon", geometry.x);
        node.setAttribute("lat", geometry.y);
        return node;
    },

    /**
     * Method: appendAttributesNode
     * Adds some attributes node.
     *
     * Parameters:
     * node - {DOMElement} the node to append the attribute nodes to.
     * feature - {<OpenLayers.Feature.Vector>}
     */
    appendAttributesNode: function(node, feature) {
        var name = this.createElementNSPlus('gpx:name');
        name.appendChild(this.createTextNode(
            feature.attributes.name || feature.id));
        node.appendChild(name);
        var desc = this.createElementNSPlus('gpx:desc');
        desc.appendChild(this.createTextNode(
            feature.attributes.description || this.defaultDesc));
        node.appendChild(desc);
        // TBD - deal with remaining (non name/description) attributes.
    },

    CLASS_NAME: "OpenLayers.Format.GPX"
});
/* ======================================================================
    OpenLayers/Format/WMSDescribeLayer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */

/**
 * Class: OpenLayers.Format.WMSDescribeLayer
 * Read SLD WMS DescribeLayer response
 * DescribeLayer is meant to couple WMS to WFS and WCS
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.WMSDescribeLayer = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {

    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.1.1".
     */
    defaultVersion: "1.1.1",
   
    /**
     * Method: getVersion
     * Returns the version to use. Subclasses can override this function
     * if a different version detection is needed.
     *
     * Parameters:
     * root - {DOMElement}
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} The version to use.
     */
    getVersion: function(root, options) {
        var version = OpenLayers.Format.XML.VersionedOGC.prototype.getVersion.apply(
            this, arguments);
        // these are identical to us, but some WMS use 1.1.1 and some use 1.1.0
        if (version == "1.1.1" || version == "1.1.0") {
            version = "1.1";
        }
        return version;
    },

    /**
     * Constructor: OpenLayers.Format.WMSDescribeLayer
     * Create a new parser for WMS DescribeLayer responses.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read DescribeLayer data from a string, and return the response. 
     * The OGC currently defines 2 formats which are allowed for output,
     * so we need to parse these 2 types
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} Array of {<LayerDescription>} objects which have:
     * - {String} owsType: WFS/WCS
     * - {String} owsURL: the online resource
     * - {String} typeName: the name of the typename on the service
     */
    
    CLASS_NAME: "OpenLayers.Format.WMSDescribeLayer" 

});
/* ======================================================================
    OpenLayers/Format/WMSDescribeLayer/v1_1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSDescribeLayer.js
 */

/**
 * Class: OpenLayers.Format.WMSDescribeLayer.v1_1
 * Read SLD WMS DescribeLayer response for WMS 1.1.X
 * WMS 1.1.X is tightly coupled to SLD 1.0.0
 *
 * Example DescribeLayer request: 
 * http://demo.opengeo.org/geoserver/wms?request=DescribeLayer&version=1.1.1&layers=topp:states
 *
 * Inherits from:
 *  - <OpenLayers.Format.WMSDescribeLayer>
 */
OpenLayers.Format.WMSDescribeLayer.v1_1 = OpenLayers.Class(
    OpenLayers.Format.WMSDescribeLayer, {
    
    /**
     * Constructor: OpenLayers.Format.WMSDescribeLayer
     * Create a new parser for WMS DescribeLayer responses.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.WMSDescribeLayer.prototype.initialize.apply(this, 
            [options]);
    },

    /**
     * APIMethod: read
     * Read DescribeLayer data from a string, and return the response. 
     * The OGC defines 2 formats which are allowed for output,
     * so we need to parse these 2 types for version 1.1.X
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} Array of {<LayerDescription>} objects which have:
     * - {String} owsType: WFS/WCS
     * - {String} owsURL: the online resource
     * - {String} typeName: the name of the typename on the service
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var root = data.documentElement;
        var children = root.childNodes; 
        var describelayer = [];
        var childNode, nodeName;
        for(var i=0; i<children.length; ++i) { 
            childNode = children[i];
            nodeName = childNode.nodeName; 
            if (nodeName == 'LayerDescription') {
                var layerName = childNode.getAttribute('name');
                var owsType = '';
                var owsURL = '';
                var typeName = '';
                // check for owsType and owsURL attributes
                if (childNode.getAttribute('owsType')) {
                  owsType = childNode.getAttribute('owsType');
                  owsURL = childNode.getAttribute('owsURL');
                } else {
                    // look for wfs or wcs attribute
                    if (childNode.getAttribute('wfs') != '') {
                        owsType = 'WFS';
                        owsURL = childNode.getAttribute('wfs');
                    } else if (childNode.getAttribute('wcs') != '') {
                        owsType = 'WCS';
                        owsURL = childNode.getAttribute('wcs');
                    }
                }
                // look for Query child
                var query = childNode.getElementsByTagName('Query');
                if(query.length > 0) {
                    typeName = query[0].getAttribute('typeName');
                    if (!typeName) {
                        // because of Ionic bug
                        typeName = query[0].getAttribute('typename');
                    }
                }
                describelayer.push({layerName: layerName, owsType: owsType, 
                    owsURL: owsURL, typeName: typeName}); 
            }
        }
        return describelayer;
    },
    
    CLASS_NAME: "OpenLayers.Format.WMSDescribeLayer.v1_1" 

});
/* ======================================================================
    OpenLayers/Layer/XYZ.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Grid.js
 */

/** 
 * Class: OpenLayers.Layer.XYZ
 * The XYZ class is designed to make it easier for people who have tiles
 * arranged by a standard XYZ grid. 
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.XYZ = OpenLayers.Class(OpenLayers.Layer.Grid, {
    
    /**
     * APIProperty: isBaseLayer
     * Default is true, as this is designed to be a base tile source. 
     */
    isBaseLayer: true,
    
    /**
     * APIProperty: sphericalMecator
     * Whether the tile extents should be set to the defaults for 
     *    spherical mercator. Useful for things like OpenStreetMap.
     *    Default is false, except for the OSM subclass.
     */
    sphericalMercator: false,

    /**
     * APIProperty: zoomOffset
     * {Number} If your cache has more zoom levels than you want to provide
     *     access to with this layer, supply a zoomOffset.  This zoom offset
     *     is added to the current map zoom level to determine the level
     *     for a requested tile.  For example, if you supply a zoomOffset
     *     of 3, when the map is at the zoom 0, tiles will be requested from
     *     level 3 of your cache.  Default is 0 (assumes cache level and map
     *     zoom are equivalent).  Using <zoomOffset> is an alternative to
     *     setting <serverResolutions> if you only want to expose a subset
     *     of the server resolutions.
     */
    zoomOffset: 0,
    
    /**
     * APIProperty: serverResolutions
     * {Array} A list of all resolutions available on the server.  Only set this
     *     property if the map resolutions differ from the server. This
     *     property serves two purposes. (a) <serverResolutions> can include
     *     resolutions that the server supports and that you don't want to
     *     provide with this layer; you can also look at <zoomOffset>, which is
     *     an alternative to <serverResolutions> for that specific purpose.
     *     (b) The map can work with resolutions that aren't supported by
     *     the server, i.e. that aren't in <serverResolutions>. When the
     *     map is displayed in such a resolution data for the closest
     *     server-supported resolution is loaded and the layer div is
     *     stretched as necessary.
     */
    serverResolutions: null,

    /**
     * Constructor: OpenLayers.Layer.XYZ
     *
     * Parameters:
     * name - {String}
     * url - {String}
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, url, options) {
        if (options && options.sphericalMercator || this.sphericalMercator) {
            options = OpenLayers.Util.extend({
                projection: "EPSG:900913",
                numZoomLevels: 19
            }, options);
        }
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, [
            name || this.name, url || this.url, {}, options
        ]);
    },
    
    /**
     * APIMethod: clone
     * Create a clone of this layer
     *
     * Parameters:
     * obj - {Object} Is this ever used?
     * 
     * Returns:
     * {<OpenLayers.Layer.XYZ>} An exact clone of this OpenLayers.Layer.XYZ
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.XYZ(this.name,
                                            this.url,
                                            this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        return obj;
    },    

    /**
     * Method: getURL
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {String} A string with the layer's url and parameters and also the
     *          passed-in bounds and appropriate tile size specified as
     *          parameters
     */
    getURL: function (bounds) {
        var xyz = this.getXYZ(bounds);
        var url = this.url;
        if (OpenLayers.Util.isArray(url)) {
            var s = '' + xyz.x + xyz.y + xyz.z;
            url = this.selectUrl(s, url);
        }
        
        return OpenLayers.String.format(url, xyz);
    },
    
    /**
     * Method: getXYZ
     * Calculates x, y and z for the given bounds.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {Object} - an object with x, y and z properties.
     */
    getXYZ: function(bounds) {
        var res = this.getServerResolution();
        var x = Math.round((bounds.left - this.maxExtent.left) /
            (res * this.tileSize.w));
        var y = Math.round((this.maxExtent.top - bounds.top) /
            (res * this.tileSize.h));
        var z = this.getServerZoom();

        if (this.wrapDateLine) {
            var limit = Math.pow(2, z);
            x = ((x % limit) + limit) % limit;
        }

        return {'x': x, 'y': y, 'z': z};
    },
    
    /* APIMethod: setMap
     * When the layer is added to a map, then we can fetch our origin 
     *    (if we don't have one.) 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
        if (!this.tileOrigin) { 
            this.tileOrigin = new OpenLayers.LonLat(this.maxExtent.left,
                                                this.maxExtent.bottom);
        }                                       
    },

    CLASS_NAME: "OpenLayers.Layer.XYZ"
});
/* ======================================================================
    OpenLayers/Layer/OSM.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/XYZ.js
 */

/**
 * Class: OpenLayers.Layer.OSM
 * This layer allows accessing OpenStreetMap tiles. By default the OpenStreetMap
 *    hosted tile.openstreetmap.org Mapnik tileset is used. If you wish to use
 *    a different layer instead, you need to provide a different
 *    URL to the constructor. Here's an example for using OpenCycleMap:
 * 
 * (code)
 *     new OpenLayers.Layer.OSM("OpenCycleMap", 
 *       ["http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 *        "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
 *        "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"]); 
 * (end)
 *
 * Inherits from:
 *  - <OpenLayers.Layer.XYZ>
 */
OpenLayers.Layer.OSM = OpenLayers.Class(OpenLayers.Layer.XYZ, {

    /**
     * APIProperty: name
     * {String} The layer name. Defaults to "OpenStreetMap" if the first
     * argument to the constructor is null or undefined.
     */
    name: "OpenStreetMap",

    /**
     * APIProperty: url
     * {String} The tileset URL scheme. Defaults to
     * : http://[a|b|c].tile.openstreetmap.org/${z}/${x}/${y}.png
     * (the official OSM tileset) if the second argument to the constructor
     * is null or undefined. To use another tileset you can have something
     * like this:
     * (code)
     *     new OpenLayers.Layer.OSM("OpenCycleMap", 
     *       ["http://a.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
     *        "http://b.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png",
     *        "http://c.tile.opencyclemap.org/cycle/${z}/${x}/${y}.png"]); 
     * (end)
     */
    url: [
        'http://a.tile.openstreetmap.org/${z}/${x}/${y}.png',
        'http://b.tile.openstreetmap.org/${z}/${x}/${y}.png',
        'http://c.tile.openstreetmap.org/${z}/${x}/${y}.png'
    ],

    /**
     * Property: attribution
     * {String} The layer attribution.
     */
    attribution: "Data CC-By-SA by <a href='http://openstreetmap.org/'>OpenStreetMap</a>",

    /**
     * Property: sphericalMercator
     * {Boolean}
     */
    sphericalMercator: true,

    /**
     * Property: wrapDateLine
     * {Boolean}
     */
    wrapDateLine: true,

    /** APIProperty: tileOptions
     *  {Object} optional configuration options for <OpenLayers.Tile> instances
     *  created by this Layer. Default is
     *
     *  (code)
     *  {crossOriginKeyword: 'anonymous'}
     *  (end)
     *
     *  When using OSM tilesets other than the default ones, it may be
     *  necessary to set this to
     *
     *  (code)
     *  {crossOriginKeyword: null}
     *  (end)
     *
     *  if the server does not send Access-Control-Allow-Origin headers.
     */
    tileOptions: null,

    /**
     * Constructor: OpenLayers.Layer.OSM
     *
     * Parameters:
     * name - {String} The layer name.
     * url - {String} The tileset URL scheme.
     * options - {Object} Configuration options for the layer. Any inherited
     *     layer option can be set in this object (e.g.
     *     <OpenLayers.Layer.Grid.buffer>).
     */
    initialize: function(name, url, options) {
        OpenLayers.Layer.XYZ.prototype.initialize.apply(this, arguments);
        this.tileOptions = OpenLayers.Util.extend({
            crossOriginKeyword: 'anonymous'
        }, this.options && this.options.tileOptions);
    },

    /**
     * Method: clone
     */
    clone: function(obj) {
        if (obj == null) {
            obj = new OpenLayers.Layer.OSM(
                this.name, this.url, this.getOptions());
        }
        obj = OpenLayers.Layer.XYZ.prototype.clone.apply(this, [obj]);
        return obj;
    },

    CLASS_NAME: "OpenLayers.Layer.OSM"
});
/* ======================================================================
    OpenLayers/Renderer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Renderer 
 * This is the base class for all renderers.
 *
 * This is based on a merger code written by Paul Spencer and Bertil Chapuis.
 * It is largely composed of virtual functions that are to be implemented
 * in technology-specific subclasses, but there is some generic code too.
 * 
 * The functions that *are* implemented here merely deal with the maintenance
 *  of the size and extent variables, as well as the cached 'resolution' 
 *  value. 
 * 
 * A note to the user that all subclasses should use getResolution() instead
 *  of directly accessing this.resolution in order to correctly use the 
 *  cacheing system.
 *
 */
OpenLayers.Renderer = OpenLayers.Class({

    /** 
     * Property: container
     * {DOMElement} 
     */
    container: null,
    
    /**
     * Property: root
     * {DOMElement}
     */
    root: null,

    /** 
     * Property: extent
     * {<OpenLayers.Bounds>}
     */
    extent: null,

    /**
     * Property: locked
     * {Boolean} If the renderer is currently in a state where many things
     *     are changing, the 'locked' property is set to true. This means 
     *     that renderers can expect at least one more drawFeature event to be
     *     called with the 'locked' property set to 'true': In some renderers,
     *     this might make sense to use as a 'only update local information'
     *     flag. 
     */  
    locked: false,
    
    /** 
     * Property: size
     * {<OpenLayers.Size>} 
     */
    size: null,
    
    /**
     * Property: resolution
     * {Float} cache of current map resolution
     */
    resolution: null,
    
    /**
     * Property: map  
     * {<OpenLayers.Map>} Reference to the map -- this is set in Vector's setMap()
     */
    map: null,
    
    /**
     * Property: featureDx
     * {Number} Feature offset in x direction. Will be calculated for and
     * applied to the current feature while rendering (see
     * <calculateFeatureDx>).
     */
    featureDx: 0,
    
    /**
     * Constructor: OpenLayers.Renderer 
     *
     * Parameters:
     * containerID - {<String>} 
     * options - {Object} options for this renderer. See sublcasses for
     *     supported options.
     */
    initialize: function(containerID, options) {
        this.container = OpenLayers.Util.getElement(containerID);
        OpenLayers.Util.extend(this, options);
    },
    
    /**
     * APIMethod: destroy
     */
    destroy: function() {
        this.container = null;
        this.extent = null;
        this.size =  null;
        this.resolution = null;
        this.map = null;
    },

    /**
     * APIMethod: supported
     * This should be overridden by specific subclasses
     * 
     * Returns:
     * {Boolean} Whether or not the browser supports the renderer class
     */
    supported: function() {
        return false;
    },    
    
    /**
     * Method: setExtent
     * Set the visible part of the layer.
     *
     * Resolution has probably changed, so we nullify the resolution 
     * cache (this.resolution) -- this way it will be re-computed when 
     * next it is needed.
     * We nullify the resolution cache (this.resolution) if resolutionChanged
     * is set to true - this way it will be re-computed on the next
     * getResolution() request.
     *
     * Parameters:
     * extent - {<OpenLayers.Bounds>}
     * resolutionChanged - {Boolean}
     *
     * Returns:
     * {Boolean} true to notify the layer that the new extent does not exceed
     *     the coordinate range, and the features will not need to be redrawn.
     *     False otherwise.
     */
    setExtent: function(extent, resolutionChanged) {
        this.extent = extent.clone();
        if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
            var ratio = extent.getWidth() / this.map.getExtent().getWidth(),
                extent = extent.scale(1 / ratio);
            this.extent = extent.wrapDateLine(this.map.getMaxExtent()).scale(ratio);
        }
        if (resolutionChanged) {
            this.resolution = null;
        }
        return true;
    },
    
    /**
     * Method: setSize
     * Sets the size of the drawing surface.
     * 
     * Resolution has probably changed, so we nullify the resolution 
     * cache (this.resolution) -- this way it will be re-computed when 
     * next it is needed.
     *
     * Parameters:
     * size - {<OpenLayers.Size>} 
     */
    setSize: function(size) {
        this.size = size.clone();
        this.resolution = null;
    },
    
    /** 
     * Method: getResolution
     * Uses cached copy of resolution if available to minimize computing
     * 
     * Returns:
     * {Float} The current map's resolution
     */
    getResolution: function() {
        this.resolution = this.resolution || this.map.getResolution();
        return this.resolution;
    },
    
    /**
     * Method: drawFeature
     * Draw the feature.  The optional style argument can be used
     * to override the feature's own style.  This method should only
     * be called from layer.drawFeature().
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     * style - {<Object>}
     * 
     * Returns:
     * {Boolean} true if the feature has been drawn completely, false if not,
     *     undefined if the feature had no geometry
     */
    drawFeature: function(feature, style) {
        if(style == null) {
            style = feature.style;
        }
        if (feature.geometry) {
            var bounds = feature.geometry.getBounds();
            if(bounds) {
                var worldBounds;
                if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
                    worldBounds = this.map.getMaxExtent();
                }
                if (!bounds.intersectsBounds(this.extent, {worldBounds: worldBounds})) {
                    style = {display: "none"};
                } else {
                    this.calculateFeatureDx(bounds, worldBounds);
                }
                var rendered = this.drawGeometry(feature.geometry, style, feature.id);
                if(style.display != "none" && style.label && rendered !== false) {

                    var location = feature.geometry.getCentroid(); 
                    if(style.labelXOffset || style.labelYOffset) {
                        var xOffset = isNaN(style.labelXOffset) ? 0 : style.labelXOffset;
                        var yOffset = isNaN(style.labelYOffset) ? 0 : style.labelYOffset;
                        var res = this.getResolution();
                        location.move(xOffset*res, yOffset*res);
                    }
                    this.drawText(feature.id, style, location);
                } else {
                    this.removeText(feature.id);
                }
                return rendered;
            }
        }
    },

    /**
     * Method: calculateFeatureDx
     * {Number} Calculates the feature offset in x direction. Looking at the
     * center of the feature bounds and the renderer extent, we calculate how
     * many world widths the two are away from each other. This distance is
     * used to shift the feature as close as possible to the center of the
     * current enderer extent, which ensures that the feature is visible in the
     * current viewport.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} Bounds of the feature
     * worldBounds - {<OpenLayers.Bounds>} Bounds of the world
     */
    calculateFeatureDx: function(bounds, worldBounds) {
        this.featureDx = 0;
        if (worldBounds) {
            var worldWidth = worldBounds.getWidth(),
                rendererCenterX = (this.extent.left + this.extent.right) / 2,
                featureCenterX = (bounds.left + bounds.right) / 2,
                worldsAway = Math.round((featureCenterX - rendererCenterX) / worldWidth);
            this.featureDx = worldsAway * worldWidth;
        }
    },

    /** 
     * Method: drawGeometry
     * 
     * Draw a geometry.  This should only be called from the renderer itself.
     * Use layer.drawFeature() from outside the renderer.
     * virtual function
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} 
     * style - {Object} 
     * featureId - {<String>} 
     */
    drawGeometry: function(geometry, style, featureId) {},
        
    /**
     * Method: drawText
     * Function for drawing text labels.
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * featureId - {String}
     * style -
     * location - {<OpenLayers.Geometry.Point>}
     */
    drawText: function(featureId, style, location) {},

    /**
     * Method: removeText
     * Function for removing text labels.
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * featureId - {String}
     */
    removeText: function(featureId) {},
    
    /**
     * Method: clear
     * Clear all vectors from the renderer.
     * virtual function.
     */    
    clear: function() {},

    /**
     * Method: getFeatureIdFromEvent
     * Returns a feature id from an event on the renderer.  
     * How this happens is specific to the renderer.  This should be
     * called from layer.getFeatureFromEvent().
     * Virtual function.
     * 
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     *
     * Returns:
     * {String} A feature id or undefined.
     */
    getFeatureIdFromEvent: function(evt) {},
    
    /**
     * Method: eraseFeatures 
     * This is called by the layer to erase features
     * 
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} 
     */
    eraseFeatures: function(features) {
        if(!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        for(var i=0, len=features.length; i<len; ++i) {
            var feature = features[i];
            this.eraseGeometry(feature.geometry, feature.id);
            this.removeText(feature.id);
        }
    },
    
    /**
     * Method: eraseGeometry
     * Remove a geometry from the renderer (by id).
     * virtual function.
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} 
     * featureId - {String}
     */
    eraseGeometry: function(geometry, featureId) {},
    
    /**
     * Method: moveRoot
     * moves this renderer's root to a (different) renderer.
     * To be implemented by subclasses that require a common renderer root for
     * feature selection.
     * 
     * Parameters:
     * renderer - {<OpenLayers.Renderer>} target renderer for the moved root
     */
    moveRoot: function(renderer) {},

    /**
     * Method: getRenderLayerId
     * Gets the layer that this renderer's output appears on. If moveRoot was
     * used, this will be different from the id of the layer containing the
     * features rendered by this renderer.
     * 
     * Returns:
     * {String} the id of the output layer.
     */
    getRenderLayerId: function() {
        return this.container.id;
    },
    
    /**
     * Method: applyDefaultSymbolizer
     * 
     * Parameters:
     * symbolizer - {Object}
     * 
     * Returns:
     * {Object}
     */
    applyDefaultSymbolizer: function(symbolizer) {
        var result = OpenLayers.Util.extend({},
            OpenLayers.Renderer.defaultSymbolizer);
        if(symbolizer.stroke === false) {
            delete result.strokeWidth;
            delete result.strokeColor;
        }
        if(symbolizer.fill === false) {
            delete result.fillColor;
        }
        OpenLayers.Util.extend(result, symbolizer);
        return result;
    },

    CLASS_NAME: "OpenLayers.Renderer"
});

/**
 * Constant: OpenLayers.Renderer.defaultSymbolizer
 * {Object} Properties from this symbolizer will be applied to symbolizers
 *     with missing properties. This can also be used to set a global
 *     symbolizer default in OpenLayers. To be SLD 1.x compliant, add the
 *     following code before rendering any vector features:
 * (code)
 * OpenLayers.Renderer.defaultSymbolizer = {
 *     fillColor: "#808080",
 *     fillOpacity: 1,
 *     strokeColor: "#000000",
 *     strokeOpacity: 1,
 *     strokeWidth: 1,
 *     pointRadius: 3,
 *     graphicName: "square"
 * };
 * (end)
 */
OpenLayers.Renderer.defaultSymbolizer = {
    fillColor: "#000000",
    strokeColor: "#000000",
    strokeWidth: 2,
    fillOpacity: 1,
    strokeOpacity: 1,
    pointRadius: 0,
    labelAlign: 'cm'
};
    


/**
 * Constant: OpenLayers.Renderer.symbol
 * Coordinate arrays for well known (named) symbols.
 */
OpenLayers.Renderer.symbol = {
    "star": [350,75, 379,161, 469,161, 397,215, 423,301, 350,250, 277,301,
            303,215, 231,161, 321,161, 350,75],
    "cross": [4,0, 6,0, 6,4, 10,4, 10,6, 6,6, 6,10, 4,10, 4,6, 0,6, 0,4, 4,4,
            4,0],
    "x": [0,0, 25,0, 50,35, 75,0, 100,0, 65,50, 100,100, 75,100, 50,65, 25,100, 0,100, 35,50, 0,0],
    "square": [0,0, 0,1, 1,1, 1,0, 0,0],
    "triangle": [0,10, 10,10, 5,0, 0,10]
};
/* ======================================================================
    OpenLayers/Renderer/Canvas.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Renderer.js
 */

/**
 * Class: OpenLayers.Renderer.Canvas 
 * A renderer based on the 2D 'canvas' drawing element.
 * 
 * Inherits:
 *  - <OpenLayers.Renderer>
 */
OpenLayers.Renderer.Canvas = OpenLayers.Class(OpenLayers.Renderer, {
    
    /**
     * APIProperty: hitDetection
     * {Boolean} Allow for hit detection of features.  Default is true.
     */
    hitDetection: true,
    
    /**
     * Property: hitOverflow
     * {Number} The method for converting feature identifiers to color values
     *     supports 16777215 sequential values.  Two features cannot be 
     *     predictably detected if their identifiers differ by more than this
     *     value.  The hitOverflow allows for bigger numbers (but the 
     *     difference in values is still limited).
     */
    hitOverflow: 0,

    /**
     * Property: canvas
     * {Canvas} The canvas context object.
     */
    canvas: null, 
    
    /**
     * Property: features
     * {Object} Internal object of feature/style pairs for use in redrawing the layer.
     */
    features: null,
    
    /**
     * Property: pendingRedraw
     * {Boolean} The renderer needs a redraw call to render features added while
     *     the renderer was locked.
     */
    pendingRedraw: false,
    
    /**
     * Property: cachedSymbolBounds
     * {Object} Internal cache of calculated symbol extents.
     */
    cachedSymbolBounds: {},
    
    /**
     * Constructor: OpenLayers.Renderer.Canvas
     *
     * Parameters:
     * containerID - {<String>}
     * options - {Object} Optional properties to be set on the renderer.
     */
    initialize: function(containerID, options) {
        OpenLayers.Renderer.prototype.initialize.apply(this, arguments);
        this.root = document.createElement("canvas");
        this.container.appendChild(this.root);
        this.canvas = this.root.getContext("2d");
        this.features = {};
        if (this.hitDetection) {
            this.hitCanvas = document.createElement("canvas");
            this.hitContext = this.hitCanvas.getContext("2d");
        }
    },
    
    /**
     * Method: setExtent
     * Set the visible part of the layer.
     *
     * Parameters:
     * extent - {<OpenLayers.Bounds>}
     * resolutionChanged - {Boolean}
     *
     * Returns:
     * {Boolean} true to notify the layer that the new extent does not exceed
     *     the coordinate range, and the features will not need to be redrawn.
     *     False otherwise.
     */
    setExtent: function() {
        OpenLayers.Renderer.prototype.setExtent.apply(this, arguments);
        // always redraw features
        return false;
    },
    
    /** 
     * Method: eraseGeometry
     * Erase a geometry from the renderer. Because the Canvas renderer has
     *     'memory' of the features that it has drawn, we have to remove the
     *     feature so it doesn't redraw.   
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * featureId - {String}
     */
    eraseGeometry: function(geometry, featureId) {
        this.eraseFeatures(this.features[featureId][0]);
    },

    /**
     * APIMethod: supported
     * 
     * Returns:
     * {Boolean} Whether or not the browser supports the renderer class
     */
    supported: function() {
        return OpenLayers.CANVAS_SUPPORTED;
    },    
    
    /**
     * Method: setSize
     * Sets the size of the drawing surface.
     *
     * Once the size is updated, redraw the canvas.
     *
     * Parameters:
     * size - {<OpenLayers.Size>} 
     */
    setSize: function(size) {
        this.size = size.clone();
        var root = this.root;
        root.style.width = size.w + "px";
        root.style.height = size.h + "px";
        root.width = size.w;
        root.height = size.h;
        this.resolution = null;
        if (this.hitDetection) {
            var hitCanvas = this.hitCanvas;
            hitCanvas.style.width = size.w + "px";
            hitCanvas.style.height = size.h + "px";
            hitCanvas.width = size.w;
            hitCanvas.height = size.h;
        }
    },
    
    /**
     * Method: drawFeature
     * Draw the feature. Stores the feature in the features list,
     * then redraws the layer. 
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     * style - {<Object>} 
     *
     * Returns:
     * {Boolean} The feature has been drawn completely.  If the feature has no
     *     geometry, undefined will be returned.  If the feature is not rendered
     *     for other reasons, false will be returned.
     */
    drawFeature: function(feature, style) {
        var rendered;
        if (feature.geometry) {
            style = this.applyDefaultSymbolizer(style || feature.style);
            // don't render if display none or feature outside extent
            var bounds = feature.geometry.getBounds();

            var worldBounds;
            if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
                worldBounds = this.map.getMaxExtent();
            }

            var intersects = bounds && bounds.intersectsBounds(this.extent, {worldBounds: worldBounds});

            rendered = (style.display !== "none") && !!bounds && intersects;
            if (rendered) {
                // keep track of what we have rendered for redraw
                this.features[feature.id] = [feature, style];
            }
            else {
                // remove from features tracked for redraw
                delete(this.features[feature.id]);
            }
            this.pendingRedraw = true;
        }
        if (this.pendingRedraw && !this.locked) {
            this.redraw();
            this.pendingRedraw = false;
        }
        return rendered;
    },

    /** 
     * Method: drawGeometry
     * Used when looping (in redraw) over the features; draws
     * the canvas. 
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>} 
     * style - {Object} 
     */
    drawGeometry: function(geometry, style, featureId) {
        var className = geometry.CLASS_NAME;
        if ((className == "OpenLayers.Geometry.Collection") ||
            (className == "OpenLayers.Geometry.MultiPoint") ||
            (className == "OpenLayers.Geometry.MultiLineString") ||
            (className == "OpenLayers.Geometry.MultiPolygon")) {
            for (var i = 0; i < geometry.components.length; i++) {
                this.drawGeometry(geometry.components[i], style, featureId);
            }
            return;
        }
        switch (geometry.CLASS_NAME) {
            case "OpenLayers.Geometry.Point":
                this.drawPoint(geometry, style, featureId);
                break;
            case "OpenLayers.Geometry.LineString":
                this.drawLineString(geometry, style, featureId);
                break;
            case "OpenLayers.Geometry.LinearRing":
                this.drawLinearRing(geometry, style, featureId);
                break;
            case "OpenLayers.Geometry.Polygon":
                this.drawPolygon(geometry, style, featureId);
                break;
            default:
                break;
        }
    },

    /**
     * Method: drawExternalGraphic
     * Called to draw External graphics. 
     * 
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>}
     * style    - {Object}
     * featureId - {String}
     */ 
    drawExternalGraphic: function(geometry, style, featureId) {
        var img = new Image();

        if (style.graphicTitle) {
            img.title = style.graphicTitle;           
        }

        var width = style.graphicWidth || style.graphicHeight;
        var height = style.graphicHeight || style.graphicWidth;
        width = width ? width : style.pointRadius * 2;
        height = height ? height : style.pointRadius * 2;
        var xOffset = (style.graphicXOffset != undefined) ?
           style.graphicXOffset : -(0.5 * width);
        var yOffset = (style.graphicYOffset != undefined) ?
           style.graphicYOffset : -(0.5 * height);

        var opacity = style.graphicOpacity || style.fillOpacity;
        
        var onLoad = function() {
            if(!this.features[featureId]) {
                return;
            }
            var pt = this.getLocalXY(geometry);
            var p0 = pt[0];
            var p1 = pt[1];
            if(!isNaN(p0) && !isNaN(p1)) {
                var x = (p0 + xOffset) | 0;
                var y = (p1 + yOffset) | 0;
                var canvas = this.canvas;
                canvas.globalAlpha = opacity;
                var factor = OpenLayers.Renderer.Canvas.drawImageScaleFactor ||
                    (OpenLayers.Renderer.Canvas.drawImageScaleFactor =
                        /android 2.1/.test(navigator.userAgent.toLowerCase()) ?
                            // 320 is the screen width of the G1 phone, for
                            // which drawImage works out of the box.
                            320 / window.screen.width : 1
                    );
                canvas.drawImage(
                    img, x*factor, y*factor, width*factor, height*factor
                );
                if (this.hitDetection) {
                    this.setHitContextStyle("fill", featureId);
                    this.hitContext.fillRect(x, y, width, height);
                }
            }
        };

        img.onload = OpenLayers.Function.bind(onLoad, this);
        img.src = style.externalGraphic;
    },

    /**
     * Method: drawNamedSymbol
     * Called to draw Well Known Graphic Symbol Name. 
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>}
     * style    - {Object}
     * featureId - {String}
     */ 
    drawNamedSymbol: function(geometry, style, featureId) {
        var x, y, cx, cy, i, symbolBounds, scaling, angle;
        var unscaledStrokeWidth;
        var deg2rad = Math.PI / 180.0;
        
        var symbol = OpenLayers.Renderer.symbol[style.graphicName];
         
        if (!symbol) {
            throw new Error(style.graphicName + ' is not a valid symbol name');
        }
        
        if (!symbol.length || symbol.length < 2) return;
        
        var pt = this.getLocalXY(geometry);
        var p0 = pt[0];
        var p1 = pt[1];
       
        if (isNaN(p0) || isNaN(p1)) return;
        
        // Use rounded line caps
        this.canvas.lineCap = "round";
        this.canvas.lineJoin = "round";
        
        if (this.hitDetection) {
            this.hitContext.lineCap = "round";
            this.hitContext.lineJoin = "round";
        }
        
        // Scale and rotate symbols, using precalculated bounds whenever possible.
        if (style.graphicName in this.cachedSymbolBounds) {
            symbolBounds = this.cachedSymbolBounds[style.graphicName];
        } else {
            symbolBounds = new OpenLayers.Bounds();
            for(i = 0; i < symbol.length; i+=2) {
                symbolBounds.extend(new OpenLayers.LonLat(symbol[i], symbol[i+1]));
            }
            this.cachedSymbolBounds[style.graphicName] = symbolBounds;
        }
        
        // Push symbol scaling, translation and rotation onto the transformation stack in reverse order.
        // Don't forget to apply all canvas transformations to the hitContext canvas as well(!)
        this.canvas.save();
        if (this.hitDetection) { this.hitContext.save(); }
        
        // Step 3: place symbol at the desired location
        this.canvas.translate(p0,p1);
        if (this.hitDetection) { this.hitContext.translate(p0,p1); }
        
        // Step 2a. rotate the symbol if necessary
        angle = deg2rad * style.rotation; // will be NaN when style.rotation is undefined.
        if (!isNaN(angle)) {
            this.canvas.rotate(angle);
            if (this.hitDetection) { this.hitContext.rotate(angle); }
        }
                
        // // Step 2: scale symbol such that pointRadius equals half the maximum symbol dimension.
        scaling = 2.0 * style.pointRadius / Math.max(symbolBounds.getWidth(), symbolBounds.getHeight());
        this.canvas.scale(scaling,scaling);
        if (this.hitDetection) { this.hitContext.scale(scaling,scaling); }
        
        // Step 1: center the symbol at the origin        
        cx = symbolBounds.getCenterLonLat().lon;
        cy = symbolBounds.getCenterLonLat().lat;
        this.canvas.translate(-cx,-cy);
        if (this.hitDetection) { this.hitContext.translate(-cx,-cy); }        

        // Don't forget to scale stroke widths, because they are affected by canvas scale transformations as well(!)
        // Alternative: scale symbol coordinates manually, so stroke width scaling is not needed anymore.
        unscaledStrokeWidth = style.strokeWidth;
        style.strokeWidth = unscaledStrokeWidth / scaling;
            
        if (style.fill !== false) {
            this.setCanvasStyle("fill", style);
            this.canvas.beginPath();
            for (i=0; i<symbol.length; i=i+2) {
                x = symbol[i];
                y = symbol[i+1];
                if (i == 0) this.canvas.moveTo(x,y);
                this.canvas.lineTo(x,y);
            }
            this.canvas.closePath();
            this.canvas.fill();

            if (this.hitDetection) {
                this.setHitContextStyle("fill", featureId, style);
                this.hitContext.beginPath();
                for (i=0; i<symbol.length; i=i+2) {
                    x = symbol[i];
                    y = symbol[i+1];
                    if (i == 0) this.canvas.moveTo(x,y);
                    this.hitContext.lineTo(x,y);
                }
                this.hitContext.closePath();
                this.hitContext.fill();
            }
        }  
        
        if (style.stroke !== false) {
            this.setCanvasStyle("stroke", style);
            this.canvas.beginPath();
            for (i=0; i<symbol.length; i=i+2) {
                x = symbol[i];
                y = symbol[i+1];
                if (i == 0) this.canvas.moveTo(x,y);
                this.canvas.lineTo(x,y);
            }
            this.canvas.closePath();
            this.canvas.stroke();
            
            
            if (this.hitDetection) {
                this.setHitContextStyle("stroke", featureId, style, scaling);
                this.hitContext.beginPath();
                for (i=0; i<symbol.length; i=i+2) {
                    x = symbol[i];
                    y = symbol[i+1];
                    if (i == 0) this.hitContext.moveTo(x,y);
                    this.hitContext.lineTo(x,y);
                }
                this.hitContext.closePath();
                this.hitContext.stroke();
            }
            
        }
        
        style.strokeWidth = unscaledStrokeWidth;
        this.canvas.restore();
        if (this.hitDetection) { this.hitContext.restore(); }
        this.setCanvasStyle("reset");  
    },

    /**
     * Method: setCanvasStyle
     * Prepare the canvas for drawing by setting various global settings.
     *
     * Parameters:
     * type - {String} one of 'stroke', 'fill', or 'reset'
     * style - {Object} Symbolizer hash
     */
    setCanvasStyle: function(type, style) {
        if (type === "fill") {     
            this.canvas.globalAlpha = style['fillOpacity'];
            this.canvas.fillStyle = style['fillColor'];
        } else if (type === "stroke") {  
            this.canvas.globalAlpha = style['strokeOpacity'];
            this.canvas.strokeStyle = style['strokeColor'];
            this.canvas.lineWidth = style['strokeWidth'];
        } else {
            this.canvas.globalAlpha = 0;
            this.canvas.lineWidth = 1;
        }
    },
    
    /**
     * Method: featureIdToHex
     * Convert a feature ID string into an RGB hex string.
     *
     * Parameters:
     * featureId - {String} Feature id
     *
     * Returns:
     * {String} RGB hex string.
     */
    featureIdToHex: function(featureId) {
        var id = Number(featureId.split("_").pop()) + 1; // zero for no feature
        if (id >= 16777216) {
            this.hitOverflow = id - 16777215;
            id = id % 16777216 + 1;
        }
        var hex = "000000" + id.toString(16);
        var len = hex.length;
        hex = "#" + hex.substring(len-6, len);
        return hex;
    },
    
    /**
     * Method: setHitContextStyle
     * Prepare the hit canvas for drawing by setting various global settings.
     *
     * Parameters:
     * type - {String} one of 'stroke', 'fill', or 'reset'
     * featureId - {String} The feature id.
     * symbolizer - {<OpenLayers.Symbolizer>} The symbolizer.
     */
    setHitContextStyle: function(type, featureId, symbolizer, strokeScaling) {
        var hex = this.featureIdToHex(featureId);
        if (type == "fill") {
            this.hitContext.globalAlpha = 1.0;
            this.hitContext.fillStyle = hex;
        } else if (type == "stroke") {  
            this.hitContext.globalAlpha = 1.0;
            this.hitContext.strokeStyle = hex;
            // bump up stroke width to deal with antialiasing. If strokeScaling is defined, we're rendering a symbol 
            // on a transformed canvas, so the antialias width bump has to scale as well.
            if (typeof strokeScaling === "undefined") {
                this.hitContext.lineWidth = symbolizer.strokeWidth + 2;
            } else {
                if (!isNaN(strokeScaling)) { this.hitContext.lineWidth = symbolizer.strokeWidth + 2.0 / strokeScaling; }
            }
        } else {
            this.hitContext.globalAlpha = 0;
            this.hitContext.lineWidth = 1;
        }
    },

    /**
     * Method: drawPoint
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>}
     * style    - {Object}
     * featureId - {String}
     */ 
    drawPoint: function(geometry, style, featureId) {
        if(style.graphic !== false) {
            if(style.externalGraphic) {
                this.drawExternalGraphic(geometry, style, featureId);
            } else if (style.graphicName && (style.graphicName != "circle")) {
                this.drawNamedSymbol(geometry, style, featureId);
            } else {
                var pt = this.getLocalXY(geometry);
                var p0 = pt[0];
                var p1 = pt[1];
                if(!isNaN(p0) && !isNaN(p1)) {
                    var twoPi = Math.PI*2;
                    var radius = style.pointRadius;
                    if(style.fill !== false) {
                        this.setCanvasStyle("fill", style);
                        this.canvas.beginPath();
                        this.canvas.arc(p0, p1, radius, 0, twoPi, true);
                        this.canvas.fill();
                        if (this.hitDetection) {
                            this.setHitContextStyle("fill", featureId, style);
                            this.hitContext.beginPath();
                            this.hitContext.arc(p0, p1, radius, 0, twoPi, true);
                            this.hitContext.fill();
                        }
                    }

                    if(style.stroke !== false) {
                        this.setCanvasStyle("stroke", style);
                        this.canvas.beginPath();
                        this.canvas.arc(p0, p1, radius, 0, twoPi, true);
                        this.canvas.stroke();
                        if (this.hitDetection) {
                            this.setHitContextStyle("stroke", featureId, style);
                            this.hitContext.beginPath();
                            this.hitContext.arc(p0, p1, radius, 0, twoPi, true);
                            this.hitContext.stroke();
                        }
                        this.setCanvasStyle("reset");
                    }
                }
            }
        }
    },
    
    /**
     * Method: drawLineString
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>}
     * style    - {Object}
     * featureId - {String}
     */ 
    drawLineString: function(geometry, style, featureId) {
        style = OpenLayers.Util.applyDefaults({fill: false}, style);
        this.drawLinearRing(geometry, style, featureId);
    },    
    
    /**
     * Method: drawLinearRing
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>}
     * style    - {Object}
     * featureId - {String}
     */ 
    drawLinearRing: function(geometry, style, featureId) {
        if (style.fill !== false) {
            this.setCanvasStyle("fill", style);
            this.renderPath(this.canvas, geometry, style, featureId, "fill");
            if (this.hitDetection) {
                this.setHitContextStyle("fill", featureId, style);
                this.renderPath(this.hitContext, geometry, style, featureId, "fill");
            }
        }
        if (style.stroke !== false) {
            this.setCanvasStyle("stroke", style);
            this.renderPath(this.canvas, geometry, style, featureId, "stroke");
            if (this.hitDetection) {
                this.setHitContextStyle("stroke", featureId, style);
                this.renderPath(this.hitContext, geometry, style, featureId, "stroke");
            }
        }
        this.setCanvasStyle("reset");
    },
    
    /**
     * Method: renderPath
     * Render a path with stroke and optional fill.
     */
    renderPath: function(context, geometry, style, featureId, type) {
        var components = geometry.components;
        var len = components.length;
        context.beginPath();
        var start = this.getLocalXY(components[0]);
        var x = start[0];
        var y = start[1];
        if (!isNaN(x) && !isNaN(y)) {
            context.moveTo(start[0], start[1]);
            for (var i=1; i<len; ++i) {
                var pt = this.getLocalXY(components[i]);
                context.lineTo(pt[0], pt[1]);
            }
            if (type === "fill") {
                context.fill();
            } else {
                context.stroke();
            }
        }
    },
    
    /**
     * Method: drawPolygon
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * geometry - {<OpenLayers.Geometry>}
     * style    - {Object}
     * featureId - {String}
     */ 
    drawPolygon: function(geometry, style, featureId) {
        var components = geometry.components;
        var len = components.length;
        this.drawLinearRing(components[0], style, featureId);
        // erase inner rings
        for (var i=1; i<len; ++i) {
            /** 
             * Note that this is overly agressive.  Here we punch holes through 
             * all previously rendered features on the same canvas.  A better 
             * solution for polygons with interior rings would be to draw the 
             * polygon on a sketch canvas first.  We could erase all holes 
             * there and then copy the drawing to the layer canvas. 
             * TODO: http://trac.osgeo.org/openlayers/ticket/3130 
             */
            this.canvas.globalCompositeOperation = "destination-out";
            if (this.hitDetection) {
                this.hitContext.globalCompositeOperation = "destination-out";
            }
            this.drawLinearRing(
                components[i], 
                OpenLayers.Util.applyDefaults({stroke: false, fillOpacity: 1.0}, style),
                featureId
            );
            this.canvas.globalCompositeOperation = "source-over";
            if (this.hitDetection) {
                this.hitContext.globalCompositeOperation = "source-over";
            }
            this.drawLinearRing(
                components[i], 
                OpenLayers.Util.applyDefaults({fill: false}, style),
                featureId
            );
        }
    },
    
    /**
     * Method: drawText
     * This method is only called by the renderer itself.
     *
     * Parameters:
     * location - {<OpenLayers.Point>}
     * style    - {Object}
     */
    drawText: function(location, style) {
        var pt = this.getLocalXY(location);

        this.setCanvasStyle("reset");
        this.canvas.fillStyle = style.fontColor;
        this.canvas.globalAlpha = style.fontOpacity || 1.0;
        var fontStyle = [style.fontStyle ? style.fontStyle : "normal",
                         "normal", // "font-variant" not supported
                         style.fontWeight ? style.fontWeight : "normal",
                         style.fontSize ? style.fontSize : "1em",
                         style.fontFamily ? style.fontFamily : "sans-serif"].join(" ");
        var labelRows = style.label.split('\n');
        var numRows = labelRows.length;
        if (this.canvas.fillText) {
            // HTML5
            this.canvas.font = fontStyle;
            this.canvas.textAlign =
                OpenLayers.Renderer.Canvas.LABEL_ALIGN[style.labelAlign[0]] ||
                "center";
            this.canvas.textBaseline =
                OpenLayers.Renderer.Canvas.LABEL_ALIGN[style.labelAlign[1]] ||
                "middle";
            var vfactor =
                OpenLayers.Renderer.Canvas.LABEL_FACTOR[style.labelAlign[1]];
            if (vfactor == null) {
                vfactor = -.5;
            }
            var lineHeight =
                this.canvas.measureText('Mg').height ||
                this.canvas.measureText('xx').width;
            pt[1] += lineHeight*vfactor*(numRows-1);
            for (var i = 0; i < numRows; i++) {
                if (style.labelOutlineWidth) {
                    this.canvas.save();
                    this.canvas.strokeStyle = style.labelOutlineColor;
                    this.canvas.lineWidth = style.labelOutlineWidth;
                    this.canvas.strokeText(labelRows[i], pt[0], pt[1] + (lineHeight*i) + 1);
                    this.canvas.restore();
                }
                this.canvas.fillText(labelRows[i], pt[0], pt[1] + (lineHeight*i));
            }
        } else if (this.canvas.mozDrawText) {
            // Mozilla pre-Gecko1.9.1 (<FF3.1)
            this.canvas.mozTextStyle = fontStyle;
            // No built-in text alignment, so we measure and adjust the position
            var hfactor =
                OpenLayers.Renderer.Canvas.LABEL_FACTOR[style.labelAlign[0]];
            if (hfactor == null) {
                hfactor = -.5;
            }
            var vfactor =
                OpenLayers.Renderer.Canvas.LABEL_FACTOR[style.labelAlign[1]];
            if (vfactor == null) {
                vfactor = -.5;
            }
            var lineHeight = this.canvas.mozMeasureText('xx');
            pt[1] += lineHeight*(1 + (vfactor*numRows));
            for (var i = 0; i < numRows; i++) {
                var x = pt[0] + (hfactor*this.canvas.mozMeasureText(labelRows[i]));
                var y = pt[1] + (i*lineHeight);
                this.canvas.translate(x, y);
                this.canvas.mozDrawText(labelRows[i]);
                this.canvas.translate(-x, -y);
            }
        }
        this.setCanvasStyle("reset");
    },
    
    /**
     * Method: getLocalXY
     * transform geographic xy into pixel xy
     *
     * Parameters: 
     * point - {<OpenLayers.Geometry.Point>}
     */
    getLocalXY: function(point) {
        var resolution = this.getResolution();
        var extent = this.extent;
        var x = ((point.x - this.featureDx) / resolution + (-extent.left / resolution));
        var y = ((extent.top / resolution) - point.y / resolution);
        return [x, y];
    },

    /**
     * Method: clear
     * Clear all vectors from the renderer.
     */    
    clear: function() {
        var height = this.root.height;
        var width = this.root.width;
        this.canvas.clearRect(0, 0, width, height);
        this.features = {};
        if (this.hitDetection) {
            this.hitContext.clearRect(0, 0, width, height);
        }
    },

    /**
     * Method: getFeatureIdFromEvent
     * Returns a feature id from an event on the renderer.  
     * 
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     *
     * Returns:
     * {<OpenLayers.Feature.Vector} A feature or undefined.  This method returns a 
     *     feature instead of a feature id to avoid an unnecessary lookup on the
     *     layer.
     */
    getFeatureIdFromEvent: function(evt) {
        var featureId, feature;
        
        if (this.hitDetection && this.root.style.display !== "none") {
            // this dragging check should go in the feature handler
            if (!this.map.dragging) {
                var xy = evt.xy;
                var x = xy.x | 0;
                var y = xy.y | 0;
                var data = this.hitContext.getImageData(x, y, 1, 1).data;
                if (data[3] === 255) { // antialiased
                    var id = data[2] + (256 * (data[1] + (256 * data[0])));
                    if (id) {
                        featureId = "OpenLayers.Feature.Vector_" + (id - 1 + this.hitOverflow);
                        try {
                            feature = this.features[featureId][0];
                        } catch(err) {
                            // Because of antialiasing on the canvas, when the hit location is at a point where the edge of
                            // one symbol intersects the interior of another symbol, a wrong hit color (and therefore id) results.
                            // todo: set Antialiasing = 'off' on the hitContext as soon as browsers allow it.
                        }
                    }
                }
            }
        }
        return feature;
    },
    
    /**
     * Method: eraseFeatures 
     * This is called by the layer to erase features; removes the feature from
     *     the list, then redraws the layer.
     * 
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} 
     */
    eraseFeatures: function(features) {
        if(!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        for(var i=0; i<features.length; ++i) {
            delete this.features[features[i].id];
        }
        this.redraw();
    },

    /**
     * Method: redraw
     * The real 'meat' of the function: any time things have changed,
     *     redraw() can be called to loop over all the data and (you guessed
     *     it) redraw it.  Unlike Elements-based Renderers, we can't interact
     *     with things once they're drawn, to remove them, for example, so
     *     instead we have to just clear everything and draw from scratch.
     */
    redraw: function() {
        if (!this.locked) {
            var height = this.root.height;
            var width = this.root.width;
            this.canvas.clearRect(0, 0, width, height);
            if (this.hitDetection) {
                this.hitContext.clearRect(0, 0, width, height);
            }
            var labelMap = [];
            var feature, geometry, style;
            var worldBounds = (this.map.baseLayer && this.map.baseLayer.wrapDateLine) && this.map.getMaxExtent();
            for (var id in this.features) {
                if (!this.features.hasOwnProperty(id)) { continue; }
                feature = this.features[id][0];
                geometry = feature.geometry;
                this.calculateFeatureDx(geometry.getBounds(), worldBounds);
                style = this.features[id][1];
                this.drawGeometry(geometry, style, feature.id);
                if(style.label) {
                    labelMap.push([feature, style]);
                }
            }
            var item;
            for (var i=0, len=labelMap.length; i<len; ++i) {
                item = labelMap[i];
                this.drawText(item[0].geometry.getCentroid(), item[1]);
            }
        }    
    },

    CLASS_NAME: "OpenLayers.Renderer.Canvas"
});

/**
 * Constant: OpenLayers.Renderer.Canvas.LABEL_ALIGN
 * {Object}
 */
OpenLayers.Renderer.Canvas.LABEL_ALIGN = {
    "l": "left",
    "r": "right",
    "t": "top",
    "b": "bottom"
};

/**
 * Constant: OpenLayers.Renderer.Canvas.LABEL_FACTOR
 * {Object}
 */
OpenLayers.Renderer.Canvas.LABEL_FACTOR = {
    "l": 0,
    "r": -1,
    "t": 0,
    "b": -1
};

/**
 * Constant: OpenLayers.Renderer.Canvas.drawImageScaleFactor
 * {Number} Scale factor to apply to the canvas drawImage arguments. This
 *     is always 1 except for Android 2.1 devices, to work around
 *     http://code.google.com/p/android/issues/detail?id=5141.
 */
OpenLayers.Renderer.Canvas.drawImageScaleFactor = null;
/* ======================================================================
    OpenLayers/Format/OSM.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Geometry/Polygon.js
 * @requires OpenLayers/Projection.js
 */

/**  
 * Class: OpenLayers.Format.OSM
 * OSM parser. Create a new instance with the 
 *     <OpenLayers.Format.OSM> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.OSM = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * APIProperty: checkTags
     * {Boolean} Should tags be checked to determine whether something
     * should be treated as a seperate node. Will slow down parsing.
     * Default is false.
     */
    checkTags: false,

    /**
     * Property: interestingTagsExclude
     * {Array} List of tags to exclude from 'interesting' checks on nodes.
     * Must be set when creating the format. Will only be used if checkTags
     * is set.
     */
    interestingTagsExclude: null, 
    
    /**
     * APIProperty: areaTags
     * {Array} List of tags indicating that something is an area.  
     * Must be set when creating the format. Will only be used if 
     * checkTags is true.
     */
    areaTags: null, 
    
    /**
     * Constructor: OpenLayers.Format.OSM
     * Create a new parser for OSM.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        var layer_defaults = {
          'interestingTagsExclude': ['source', 'source_ref', 
              'source:ref', 'history', 'attribution', 'created_by'],
          'areaTags': ['area', 'building', 'leisure', 'tourism', 'ruins',
              'historic', 'landuse', 'military', 'natural', 'sport'] 
        };
          
        layer_defaults = OpenLayers.Util.extend(layer_defaults, options);
        
        var interesting = {};
        for (var i = 0; i < layer_defaults.interestingTagsExclude.length; i++) {
            interesting[layer_defaults.interestingTagsExclude[i]] = true;
        }
        layer_defaults.interestingTagsExclude = interesting;
        
        var area = {};
        for (var i = 0; i < layer_defaults.areaTags.length; i++) {
            area[layer_defaults.areaTags[i]] = true;
        }
        layer_defaults.areaTags = area;

        // OSM coordinates are always in longlat WGS84
        this.externalProjection = new OpenLayers.Projection("EPSG:4326");
        
        OpenLayers.Format.XML.prototype.initialize.apply(this, [layer_defaults]);
    },
    
    /**
     * APIMethod: read
     * Return a list of features from a OSM doc
     
     * Parameters:
     * doc - {Element} 
     *
     * Returns:
     * Array({<OpenLayers.Feature.Vector>})
     */
    read: function(doc) {
        if (typeof doc == "string") { 
            doc = OpenLayers.Format.XML.prototype.read.apply(this, [doc]);
        }

        var nodes = this.getNodes(doc);
        var ways = this.getWays(doc);
        
        // Geoms will contain at least ways.length entries.
        var feat_list = new Array(ways.length);
        
        for (var i = 0; i < ways.length; i++) {
            // We know the minimal of this one ahead of time. (Could be -1
            // due to areas/polygons)
            var point_list = new Array(ways[i].nodes.length);
            
            var poly = this.isWayArea(ways[i]) ? 1 : 0; 
            for (var j = 0; j < ways[i].nodes.length; j++) {
               var node = nodes[ways[i].nodes[j]];
               
               var point = new OpenLayers.Geometry.Point(node.lon, node.lat);
               
               // Since OSM is topological, we stash the node ID internally. 
               point.osm_id = parseInt(ways[i].nodes[j]);
               point_list[j] = point;
               
               // We don't display nodes if they're used inside other 
               // elements.
               node.used = true; 
            }
            var geometry = null;
            if (poly) { 
                geometry = new OpenLayers.Geometry.Polygon(
                    new OpenLayers.Geometry.LinearRing(point_list));
            } else {    
                geometry = new OpenLayers.Geometry.LineString(point_list);
            }
            if (this.internalProjection && this.externalProjection) {
                geometry.transform(this.externalProjection, 
                    this.internalProjection);
            }        
            var feat = new OpenLayers.Feature.Vector(geometry,
                ways[i].tags);
            feat.osm_id = parseInt(ways[i].id);
            feat.fid = "way." + feat.osm_id;
            feat_list[i] = feat;
        } 
        for (var node_id in nodes) {
            var node = nodes[node_id];
            if (!node.used || this.checkTags) {
                var tags = null;
                
                if (this.checkTags) {
                    var result = this.getTags(node.node, true);
                    if (node.used && !result[1]) {
                        continue;
                    }
                    tags = result[0];
                } else { 
                    tags = this.getTags(node.node);
                }    
                
                var feat = new OpenLayers.Feature.Vector(
                    new OpenLayers.Geometry.Point(node['lon'], node['lat']),
                    tags);
                if (this.internalProjection && this.externalProjection) {
                    feat.geometry.transform(this.externalProjection, 
                        this.internalProjection);
                }        
                feat.osm_id = parseInt(node_id); 
                feat.fid = "node." + feat.osm_id;
                feat_list.push(feat);
            }   
            // Memory cleanup
            node.node = null;
        }        
        return feat_list;
    },

    /**
     * Method: getNodes
     * Return the node items from a doc.  
     *
     * Parameters:
     * doc - {DOMElement} node to parse tags from
     */
    getNodes: function(doc) {
        var node_list = doc.getElementsByTagName("node");
        var nodes = {};
        for (var i = 0; i < node_list.length; i++) {
            var node = node_list[i];
            var id = node.getAttribute("id");
            nodes[id] = {
                'lat': node.getAttribute("lat"),
                'lon': node.getAttribute("lon"),
                'node': node
            };
        }
        return nodes;
    },

    /**
     * Method: getWays
     * Return the way items from a doc.  
     *
     * Parameters:
     * doc - {DOMElement} node to parse tags from
     */
    getWays: function(doc) {
        var way_list = doc.getElementsByTagName("way");
        var return_ways = [];
        for (var i = 0; i < way_list.length; i++) {
            var way = way_list[i];
            var way_object = {
              id: way.getAttribute("id")
            };
            
            way_object.tags = this.getTags(way);
            
            var node_list = way.getElementsByTagName("nd");
            
            way_object.nodes = new Array(node_list.length);
            
            for (var j = 0; j < node_list.length; j++) {
                way_object.nodes[j] = node_list[j].getAttribute("ref");
            }  
            return_ways.push(way_object);
        }
        return return_ways; 
        
    },  
    
    /**
     * Method: getTags
     * Return the tags list attached to a specific DOM element.
     *
     * Parameters:
     * dom_node - {DOMElement} node to parse tags from
     * interesting_tags - {Boolean} whether the return from this function should
     *    return a boolean indicating that it has 'interesting tags' -- 
     *    tags like attribution and source are ignored. (To change the list
     *    of tags, see interestingTagsExclude)
     * 
     * Returns:
     * tags - {Object} hash of tags
     * interesting - {Boolean} if interesting_tags is passed, returns
     *     whether there are any interesting tags on this element.
     */
    getTags: function(dom_node, interesting_tags) {
        var tag_list = dom_node.getElementsByTagName("tag");
        var tags = {};
        var interesting = false;
        for (var j = 0; j < tag_list.length; j++) {
            var key = tag_list[j].getAttribute("k");
            tags[key] = tag_list[j].getAttribute("v");
            if (interesting_tags) {
                if (!this.interestingTagsExclude[key]) {
                    interesting = true;
                }
            }    
        }  
        return interesting_tags ? [tags, interesting] : tags;     
    },

    /** 
     * Method: isWayArea
     * Given a way object from getWays, check whether the tags and geometry
     * indicate something is an area.
     *
     * Returns:
     * {Boolean}
     */
    isWayArea: function(way) { 
        var poly_shaped = false;
        var poly_tags = false;
        
        if (way.nodes[0] == way.nodes[way.nodes.length - 1]) {
            poly_shaped = true;
        }
        if (this.checkTags) {
            for(var key in way.tags) {
                if (this.areaTags[key]) {
                    poly_tags = true;
                    break;
                }
            }
        }    
        return poly_shaped && (this.checkTags ? poly_tags : true);            
    }, 

    /**
     * APIMethod: write 
     * Takes a list of features, returns a serialized OSM format file for use
     * in tools like JOSM.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)}
     */
    write: function(features) { 
        if (!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        
        this.osm_id = 1;
        this.created_nodes = {};
        var root_node = this.createElementNS(null, "osm");
        root_node.setAttribute("version", "0.5");
        root_node.setAttribute("generator", "OpenLayers "+ OpenLayers.VERSION_NUMBER);

        // Loop backwards, because the deserializer puts nodes last, and 
        // we want them first if possible
        for(var i = features.length - 1; i >= 0; i--) {
            var nodes = this.createFeatureNodes(features[i]);
            for (var j = 0; j < nodes.length; j++) {
                root_node.appendChild(nodes[j]);
            }    
        }
        return OpenLayers.Format.XML.prototype.write.apply(this, [root_node]);
    },

    /**
     * Method: createFeatureNodes
     * Takes a feature, returns a list of nodes from size 0->n.
     * Will include all pieces of the serialization that are required which
     * have not already been created. Calls out to createXML based on geometry
     * type.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     */
    createFeatureNodes: function(feature) {
        var nodes = [];
        var className = feature.geometry.CLASS_NAME;
        var type = className.substring(className.lastIndexOf(".") + 1);
        type = type.toLowerCase();
        var builder = this.createXML[type];
        if (builder) {
            nodes = builder.apply(this, [feature]);
        }
        return nodes;
    },
    
    /**
     * Method: createXML
     * Takes a feature, returns a list of nodes from size 0->n.
     * Will include all pieces of the serialization that are required which
     * have not already been created.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     */
    createXML: {
        'point': function(point) {
            var id = null;
            var geometry = point.geometry ? point.geometry : point;
            
            if (this.internalProjection && this.externalProjection) {
                geometry = geometry.clone();
                geometry.transform(this.internalProjection, 
                                   this.externalProjection);
            }                       
            
            var already_exists = false; // We don't return anything if the node
                                        // has already been created
            if (point.osm_id) {
                id = point.osm_id;
                if (this.created_nodes[id]) {
                    already_exists = true;
                }    
            } else {
               id = -this.osm_id;
               this.osm_id++; 
            }
            if (already_exists) {
                node = this.created_nodes[id];
            } else {    
                var node = this.createElementNS(null, "node");
            }
            this.created_nodes[id] = node;
            node.setAttribute("id", id);
            node.setAttribute("lon", geometry.x); 
            node.setAttribute("lat", geometry.y);
            if (point.attributes) {
                this.serializeTags(point, node);
            }
            this.setState(point, node);
            return already_exists ? [] : [node];
        }, 
        linestring: function(feature) {
            var id;
            var nodes = [];
            var geometry = feature.geometry;
            if (feature.osm_id) {
                id = feature.osm_id;
            } else {
                id = -this.osm_id;
                this.osm_id++; 
            }
            var way = this.createElementNS(null, "way");
            way.setAttribute("id", id);
            for (var i = 0; i < geometry.components.length; i++) {
                var node = this.createXML['point'].apply(this, [geometry.components[i]]);
                if (node.length) {
                    node = node[0];
                    var node_ref = node.getAttribute("id");
                    nodes.push(node);
                } else {
                    node_ref = geometry.components[i].osm_id;
                    node = this.created_nodes[node_ref];
                }
                this.setState(feature, node);
                var nd_dom = this.createElementNS(null, "nd");
                nd_dom.setAttribute("ref", node_ref);
                way.appendChild(nd_dom);
            }
            this.serializeTags(feature, way);
            nodes.push(way);
            
            return nodes;
        },
        polygon: function(feature) {
            var attrs = OpenLayers.Util.extend({'area':'yes'}, feature.attributes);
            var feat = new OpenLayers.Feature.Vector(feature.geometry.components[0], attrs); 
            feat.osm_id = feature.osm_id;
            return this.createXML['linestring'].apply(this, [feat]);
        }
    },

    /**
     * Method: serializeTags
     * Given a feature, serialize the attributes onto the given node.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * node - {DOMNode}
     */
    serializeTags: function(feature, node) {
        for (var key in feature.attributes) {
            var tag = this.createElementNS(null, "tag");
            tag.setAttribute("k", key);
            tag.setAttribute("v", feature.attributes[key]);
            node.appendChild(tag);
        }
    },

    /**
     * Method: setState 
     * OpenStreetMap has a convention that 'state' is stored for modification or deletion.
     * This allows the file to be uploaded via JOSM or the bulk uploader tool.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * node - {DOMNode}
     */
    setState: function(feature, node) {
        if (feature.state) {
            var state = null;
            switch(feature.state) {
                case OpenLayers.State.UPDATE:
                    state = "modify";
                case OpenLayers.State.DELETE:
                    state = "delete";
            }
            if (state) {
                node.setAttribute("action", state);
            }
        }    
    },

    CLASS_NAME: "OpenLayers.Format.OSM" 
});     
/* ======================================================================
    OpenLayers/Handler.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Events.js
 */

/**
 * Class: OpenLayers.Handler
 * Base class to construct a higher-level handler for event sequences.  All
 *     handlers have activate and deactivate methods.  In addition, they have
 *     methods named like browser events.  When a handler is activated, any
 *     additional methods named like a browser event is registered as a
 *     listener for the corresponding event.  When a handler is deactivated,
 *     those same methods are unregistered as event listeners.
 *
 * Handlers also typically have a callbacks object with keys named like
 *     the abstracted events or event sequences that they are in charge of
 *     handling.  The controls that wrap handlers define the methods that
 *     correspond to these abstract events - so instead of listening for
 *     individual browser events, they only listen for the abstract events
 *     defined by the handler.
 *     
 * Handlers are created by controls, which ultimately have the responsibility
 *     of making changes to the the state of the application.  Handlers
 *     themselves may make temporary changes, but in general are expected to
 *     return the application in the same state that they found it.
 */
OpenLayers.Handler = OpenLayers.Class({

    /**
     * Property: id
     * {String}
     */
    id: null,
        
    /**
     * APIProperty: control
     * {<OpenLayers.Control>}. The control that initialized this handler.  The
     *     control is assumed to have a valid map property - that map is used
     *     in the handler's own setMap method.
     */
    control: null,

    /**
     * Property: map
     * {<OpenLayers.Map>}
     */
    map: null,

    /**
     * APIProperty: keyMask
     * {Integer} Use bitwise operators and one or more of the OpenLayers.Handler
     *     constants to construct a keyMask.  The keyMask is used by
     *     <checkModifiers>.  If the keyMask matches the combination of keys
     *     down on an event, checkModifiers returns true.
     *
     * Example:
     * (code)
     *     // handler only responds if the Shift key is down
     *     handler.keyMask = OpenLayers.Handler.MOD_SHIFT;
     *
     *     // handler only responds if Ctrl-Shift is down
     *     handler.keyMask = OpenLayers.Handler.MOD_SHIFT |
     *                       OpenLayers.Handler.MOD_CTRL;
     * (end)
     */
    keyMask: null,

    /**
     * Property: active
     * {Boolean}
     */
    active: false,
    
    /**
     * Property: evt
     * {Event} This property references the last event handled by the handler.
     *     Note that this property is not part of the stable API.  Use of the
     *     evt property should be restricted to controls in the library
     *     or other applications that are willing to update with changes to
     *     the OpenLayers code.
     */
    evt: null,

    /**
     * Constructor: OpenLayers.Handler
     * Construct a handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that initialized this
     *     handler.  The control is assumed to have a valid map property; that
     *     map is used in the handler's own setMap method.  If a map property
     *     is present in the options argument it will be used instead.
     * callbacks - {Object} An object whose properties correspond to abstracted
     *     events or sequences of browser events.  The values for these
     *     properties are functions defined by the control that get called by
     *     the handler.
     * options - {Object} An optional object whose properties will be set on
     *     the handler.
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Util.extend(this, options);
        this.control = control;
        this.callbacks = callbacks;

        var map = this.map || control.map;
        if (map) {
            this.setMap(map); 
        }
        
        this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
    },
    
    /**
     * Method: setMap
     */
    setMap: function (map) {
        this.map = map;
    },

    /**
     * Method: checkModifiers
     * Check the keyMask on the handler.  If no <keyMask> is set, this always
     *     returns true.  If a <keyMask> is set and it matches the combination
     *     of keys down on an event, this returns true.
     *
     * Returns:
     * {Boolean} The keyMask matches the keys down on an event.
     */
    checkModifiers: function (evt) {
        if(this.keyMask == null) {
            return true;
        }
        /* calculate the keyboard modifier mask for this event */
        var keyModifiers =
            (evt.shiftKey ? OpenLayers.Handler.MOD_SHIFT : 0) |
            (evt.ctrlKey  ? OpenLayers.Handler.MOD_CTRL  : 0) |
            (evt.altKey   ? OpenLayers.Handler.MOD_ALT   : 0);
    
        /* if it differs from the handler object's key mask,
           bail out of the event handler */
        return (keyModifiers == this.keyMask);
    },

    /**
     * APIMethod: activate
     * Turn on the handler.  Returns false if the handler was already active.
     * 
     * Returns: 
     * {Boolean} The handler was activated.
     */
    activate: function() {
        if(this.active) {
            return false;
        }
        // register for event handlers defined on this class.
        var events = OpenLayers.Events.prototype.BROWSER_EVENTS;
        for (var i=0, len=events.length; i<len; i++) {
            if (this[events[i]]) {
                this.register(events[i], this[events[i]]); 
            }
        } 
        this.active = true;
        return true;
    },
    
    /**
     * APIMethod: deactivate
     * Turn off the handler.  Returns false if the handler was already inactive.
     * 
     * Returns:
     * {Boolean} The handler was deactivated.
     */
    deactivate: function() {
        if(!this.active) {
            return false;
        }
        // unregister event handlers defined on this class.
        var events = OpenLayers.Events.prototype.BROWSER_EVENTS;
        for (var i=0, len=events.length; i<len; i++) {
            if (this[events[i]]) {
                this.unregister(events[i], this[events[i]]); 
            }
        } 
        this.active = false;
        return true;
    },

    /**
    * Method: callback
    * Trigger the control's named callback with the given arguments
    *
    * Parameters:
    * name - {String} The key for the callback that is one of the properties
    *     of the handler's callbacks object.
    * args - {Array(*)} An array of arguments (any type) with which to call 
    *     the callback (defined by the control).
    */
    callback: function (name, args) {
        if (name && this.callbacks[name]) {
            this.callbacks[name].apply(this.control, args);
        }
    },

    /**
    * Method: register
    * register an event on the map
    */
    register: function (name, method) {
        // TODO: deal with registerPriority in 3.0
        this.map.events.registerPriority(name, this, method);
        this.map.events.registerPriority(name, this, this.setEvent);
    },

    /**
    * Method: unregister
    * unregister an event from the map
    */
    unregister: function (name, method) {
        this.map.events.unregister(name, this, method);   
        this.map.events.unregister(name, this, this.setEvent);
    },
    
    /**
     * Method: setEvent
     * With each registered browser event, the handler sets its own evt
     *     property.  This property can be accessed by controls if needed
     *     to get more information about the event that the handler is
     *     processing.
     *
     * This allows modifier keys on the event to be checked (alt, shift,
     *     and ctrl cannot be checked with the keyboard handler).  For a
     *     control to determine which modifier keys are associated with the
     *     event that a handler is currently processing, it should access
     *     (code)handler.evt.altKey || handler.evt.shiftKey ||
     *     handler.evt.ctrlKey(end).
     *
     * Parameters:
     * evt - {Event} The browser event.
     */
    setEvent: function(evt) {
        this.evt = evt;
        return true;
    },

    /**
     * Method: destroy
     * Deconstruct the handler.
     */
    destroy: function () {
        // unregister event listeners
        this.deactivate();
        // eliminate circular references
        this.control = this.map = null;        
    },

    CLASS_NAME: "OpenLayers.Handler"
});

/**
 * Constant: OpenLayers.Handler.MOD_NONE
 * If set as the <keyMask>, <checkModifiers> returns false if any key is down.
 */
OpenLayers.Handler.MOD_NONE  = 0;

/**
 * Constant: OpenLayers.Handler.MOD_SHIFT
 * If set as the <keyMask>, <checkModifiers> returns false if Shift is down.
 */
OpenLayers.Handler.MOD_SHIFT = 1;

/**
 * Constant: OpenLayers.Handler.MOD_CTRL
 * If set as the <keyMask>, <checkModifiers> returns false if Ctrl is down.
 */
OpenLayers.Handler.MOD_CTRL  = 2;

/**
 * Constant: OpenLayers.Handler.MOD_ALT
 * If set as the <keyMask>, <checkModifiers> returns false if Alt is down.
 */
OpenLayers.Handler.MOD_ALT   = 4;


/* ======================================================================
    OpenLayers/Handler/Drag.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 */

/**
 * Class: OpenLayers.Handler.Drag
 * The drag handler is used to deal with sequences of browser events related
 *     to dragging.  The handler is used by controls that want to know when
 *     a drag sequence begins, when a drag is happening, and when it has
 *     finished.
 *
 * Controls that use the drag handler typically construct it with callbacks
 *     for 'down', 'move', and 'done'.  Callbacks for these keys are called
 *     when the drag begins, with each move, and when the drag is done.  In
 *     addition, controls can have callbacks keyed to 'up' and 'out' if they
 *     care to differentiate between the types of events that correspond with
 *     the end of a drag sequence.  If no drag actually occurs (no mouse move)
 *     the 'down' and 'up' callbacks will be called, but not the 'done'
 *     callback.
 *
 * Create a new drag handler with the <OpenLayers.Handler.Drag> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.Drag = OpenLayers.Class(OpenLayers.Handler, {
  
    /** 
     * Property: started
     * {Boolean} When a mousedown or touchstart event is received, we want to
     * record it, but not set 'dragging' until the mouse moves after starting.
     */
    started: false,

    /**
     * Property: stopDown
     * {Boolean} Stop propagation of mousedown events from getting to listeners
     *     on the same element.  Default is true.
     */
    stopDown: true,

    /** 
     * Property: dragging 
     * {Boolean} 
     */
    dragging: false,

    /**
     * Property: touch
     * {Boolean} When a touchstart event is fired, touch will be true and all
     *     mouse related listeners will do nothing.
     */
    touch: false,

    /** 
     * Property: last
     * {<OpenLayers.Pixel>} The last pixel location of the drag.
     */
    last: null,

    /** 
     * Property: start
     * {<OpenLayers.Pixel>} The first pixel location of the drag.
     */
    start: null,

    /**
     * Property: lastMoveEvt
     * {Object} The last mousemove event that occurred. Used to
     *     position the map correctly when our "delay drag"
     *     timeout expired.
     */
    lastMoveEvt: null,

    /**
     * Property: oldOnselectstart
     * {Function}
     */
    oldOnselectstart: null,
    
    /**
     * Property: interval
     * {Integer} In order to increase performance, an interval (in 
     *     milliseconds) can be set to reduce the number of drag events 
     *     called. If set, a new drag event will not be set until the 
     *     interval has passed. 
     *     Defaults to 0, meaning no interval. 
     */
    interval: 0,
    
    /**
     * Property: timeoutId
     * {String} The id of the timeout used for the mousedown interval.
     *     This is "private", and should be left alone.
     */
    timeoutId: null,
    
    /**
     * APIProperty: documentDrag
     * {Boolean} If set to true, the handler will also handle mouse moves when
     *     the cursor has moved out of the map viewport. Default is false.
     */
    documentDrag: false,
    
    /**
     * Property: documentEvents
     * {Boolean} Are we currently observing document events?
     */
    documentEvents: null,

    /**
     * Constructor: OpenLayers.Handler.Drag
     * Returns OpenLayers.Handler.Drag
     * 
     * Parameters:
     * control - {<OpenLayers.Control>} The control that is making use of
     *     this handler.  If a handler is being used without a control, the
     *     handlers setMap method must be overridden to deal properly with
     *     the map.
     * callbacks - {Object} An object containing a single function to be
     *     called when the drag operation is finished. The callback should
     *     expect to recieve a single argument, the pixel location of the event.
     *     Callbacks for 'move' and 'done' are supported. You can also speficy
     *     callbacks for 'down', 'up', and 'out' to respond to those events.
     * options - {Object} 
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Handler.prototype.initialize.apply(this, arguments);
        
        if (this.documentDrag === true) {
            var me = this;
            this._docMove = function(evt) {
                me.mousemove({
                    xy: {x: evt.clientX, y: evt.clientY},
                    element: document
                });
            };
            this._docUp = function(evt) {
                me.mouseup({xy: {x: evt.clientX, y: evt.clientY}});
            };
        }
    },

    
    /**
     * Method: dragstart
     * This private method is factorized from mousedown and touchstart methods
     *
     * Parameters:
     * evt - {Event} The event
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    dragstart: function (evt) {
        var propagate = true;
        this.dragging = false;
        if (this.checkModifiers(evt) &&
               (OpenLayers.Event.isLeftClick(evt) ||
                OpenLayers.Event.isSingleTouch(evt))) {
            this.started = true;
            this.start = evt.xy;
            this.last = evt.xy;
            OpenLayers.Element.addClass(
                this.map.viewPortDiv, "olDragDown"
            );
            this.down(evt);
            this.callback("down", [evt.xy]);

            OpenLayers.Event.stop(evt);

            if(!this.oldOnselectstart) {
                this.oldOnselectstart = document.onselectstart ?
                    document.onselectstart : OpenLayers.Function.True;
            }
            document.onselectstart = OpenLayers.Function.False;

            propagate = !this.stopDown;
        } else {
            this.started = false;
            this.start = null;
            this.last = null;
        }
        return propagate;
    },

    /**
     * Method: dragmove
     * This private method is factorized from mousemove and touchmove methods
     *
     * Parameters:
     * evt - {Event} The event
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    dragmove: function (evt) {
        this.lastMoveEvt = evt;
        if (this.started && !this.timeoutId && (evt.xy.x != this.last.x ||
                                                evt.xy.y != this.last.y)) {
            if(this.documentDrag === true && this.documentEvents) {
                if(evt.element === document) {
                    this.adjustXY(evt);
                    // do setEvent manually because the documentEvents are not
                    // registered with the map
                    this.setEvent(evt);
                } else {
                    this.removeDocumentEvents();
                }
            }
            if (this.interval > 0) {
                this.timeoutId = setTimeout(
                    OpenLayers.Function.bind(this.removeTimeout, this),
                    this.interval);
            }
            this.dragging = true;

            this.move(evt);
            this.callback("move", [evt.xy]);
            if(!this.oldOnselectstart) {
                this.oldOnselectstart = document.onselectstart;
                document.onselectstart = OpenLayers.Function.False;
            }
            this.last = evt.xy;
        }
        return true;
    },

    /**
     * Method: dragend
     * This private method is factorized from mouseup and touchend methods
     *
     * Parameters:
     * evt - {Event} The event
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    dragend: function (evt) {
        if (this.started) {
            if(this.documentDrag === true && this.documentEvents) {
                this.adjustXY(evt);
                this.removeDocumentEvents();
            }
            var dragged = (this.start != this.last);
            this.started = false;
            this.dragging = false;
            OpenLayers.Element.removeClass(
                this.map.viewPortDiv, "olDragDown"
            );
            this.up(evt);
            this.callback("up", [evt.xy]);
            if(dragged) {
                this.callback("done", [evt.xy]);
            }
            document.onselectstart = this.oldOnselectstart;
        }
        return true;
    },

    /**
     * The four methods below (down, move, up, and out) are used by subclasses
     *     to do their own processing related to these mouse events.
     */

    /**
     * Method: down
     * This method is called during the handling of the mouse down event.
     *     Subclasses can do their own processing here.
     *
     * Parameters:
     * evt - {Event} The mouse down event
     */
    down: function(evt) {
    },

    /**
     * Method: move
     * This method is called during the handling of the mouse move event.
     *     Subclasses can do their own processing here.
     *
     * Parameters:
     * evt - {Event} The mouse move event
     *
     */
    move: function(evt) {
    },

    /**
     * Method: up
     * This method is called during the handling of the mouse up event.
     *     Subclasses can do their own processing here.
     *
     * Parameters:
     * evt - {Event} The mouse up event
     */
    up: function(evt) {
    },

    /**
     * Method: out
     * This method is called during the handling of the mouse out event.
     *     Subclasses can do their own processing here.
     *
     * Parameters:
     * evt - {Event} The mouse out event
     */
    out: function(evt) {
    },

    /**
     * The methods below are part of the magic of event handling.  Because
     *     they are named like browser events, they are registered as listeners
     *     for the events they represent.
     */

    /**
     * Method: mousedown
     * Handle mousedown events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    mousedown: function(evt) {
        return this.dragstart(evt);
    },

    /**
     * Method: touchstart
     * Handle touchstart events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchstart: function(evt) {
        if (!this.touch) {
            this.touch = true;
            // unregister mouse listeners
            this.map.events.un({
                mousedown: this.mousedown,
                mouseup: this.mouseup,
                mousemove: this.mousemove,
                click: this.click,
                scope: this
            });
        }
        return this.dragstart(evt);
    },

    /**
     * Method: mousemove
     * Handle mousemove events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    mousemove: function(evt) {
        return this.dragmove(evt);
    },

    /**
     * Method: touchmove
     * Handle touchmove events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchmove: function(evt) {
        return this.dragmove(evt);
    },

    /**
     * Method: removeTimeout
     * Private. Called by mousemove() to remove the drag timeout.
     */
    removeTimeout: function() {
        this.timeoutId = null;
        // if timeout expires while we're still dragging (mouseup
        // hasn't occurred) then call mousemove to move to the
        // correct position
        if(this.dragging) {
            this.mousemove(this.lastMoveEvt);
        }
    },

    /**
     * Method: mouseup
     * Handle mouseup events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    mouseup: function(evt) {
        return this.dragend(evt);
    },

    /**
     * Method: touchend
     * Handle touchend events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchend: function(evt) {
        // override evt.xy with last position since touchend does not have
        // any touch position
        evt.xy = this.last;
        return this.dragend(evt);
    },

    /**
     * Method: mouseout
     * Handle mouseout events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    mouseout: function (evt) {
        if (this.started && OpenLayers.Util.mouseLeft(evt, this.map.viewPortDiv)) {
            if(this.documentDrag === true) {
                this.addDocumentEvents();
            } else {
                var dragged = (this.start != this.last);
                this.started = false; 
                this.dragging = false;
                OpenLayers.Element.removeClass(
                    this.map.viewPortDiv, "olDragDown"
                );
                this.out(evt);
                this.callback("out", []);
                if(dragged) {
                    this.callback("done", [evt.xy]);
                }
                if(document.onselectstart) {
                    document.onselectstart = this.oldOnselectstart;
                }
            }
        }
        return true;
    },

    /**
     * Method: click
     * The drag handler captures the click event.  If something else registers
     *     for clicks on the same element, its listener will not be called 
     *     after a drag.
     * 
     * Parameters: 
     * evt - {Event} 
     * 
     * Returns:
     * {Boolean} Let the event propagate.
     */
    click: function (evt) {
        // let the click event propagate only if the mouse moved
        return (this.start == this.last);
    },

    /**
     * Method: activate
     * Activate the handler.
     * 
     * Returns:
     * {Boolean} The handler was successfully activated.
     */
    activate: function() {
        var activated = false;
        if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            this.dragging = false;
            activated = true;
        }
        return activated;
    },

    /**
     * Method: deactivate 
     * Deactivate the handler.
     * 
     * Returns:
     * {Boolean} The handler was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = false;
        if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            this.touch = false;
            this.started = false;
            this.dragging = false;
            this.start = null;
            this.last = null;
            deactivated = true;
            OpenLayers.Element.removeClass(
                this.map.viewPortDiv, "olDragDown"
            );
        }
        return deactivated;
    },
    
    /**
     * Method: adjustXY
     * Converts event coordinates that are relative to the document body to
     * ones that are relative to the map viewport. The latter is the default in
     * OpenLayers.
     * 
     * Parameters:
     * evt - {Object}
     */
    adjustXY: function(evt) {
        var pos = OpenLayers.Util.pagePosition(this.map.viewPortDiv);
        evt.xy.x -= pos[0];
        evt.xy.y -= pos[1];
    },
    
    /**
     * Method: addDocumentEvents
     * Start observing document events when documentDrag is true and the mouse
     * cursor leaves the map viewport while dragging.
     */
    addDocumentEvents: function() {
        OpenLayers.Element.addClass(document.body, "olDragDown");
        this.documentEvents = true;
        OpenLayers.Event.observe(document, "mousemove", this._docMove);
        OpenLayers.Event.observe(document, "mouseup", this._docUp);
    },
    
    /**
     * Method: removeDocumentEvents
     * Stops observing document events when documentDrag is true and the mouse
     * cursor re-enters the map viewport while dragging.
     */
    removeDocumentEvents: function() {
        OpenLayers.Element.removeClass(document.body, "olDragDown");
        this.documentEvents = false;
        OpenLayers.Event.stopObserving(document, "mousemove", this._docMove);
        OpenLayers.Event.stopObserving(document, "mouseup", this._docUp);
    },

    CLASS_NAME: "OpenLayers.Handler.Drag"
});
/* ======================================================================
    OpenLayers/Handler/Feature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler.js
 */

/**
 * Class: OpenLayers.Handler.Feature 
 * Handler to respond to mouse events related to a drawn feature.  Callbacks
 *     with the following keys will be notified of the following events
 *     associated with features: click, clickout, over, out, and dblclick.
 *
 * This handler stops event propagation for mousedown and mouseup if those
 *     browser events target features that can be selected.
 *
 * Inherits from:
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.Feature = OpenLayers.Class(OpenLayers.Handler, {

    /**
     * Property: EVENTMAP
     * {Object} A object mapping the browser events to objects with callback
     *     keys for in and out.
     */
    EVENTMAP: {
        'click': {'in': 'click', 'out': 'clickout'},
        'mousemove': {'in': 'over', 'out': 'out'},
        'dblclick': {'in': 'dblclick', 'out': null},
        'mousedown': {'in': null, 'out': null},
        'mouseup': {'in': null, 'out': null},
        'touchstart': {'in': 'click', 'out': 'clickout'}
    },

    /**
     * Property: feature
     * {<OpenLayers.Feature.Vector>} The last feature that was hovered.
     */
    feature: null,

    /**
     * Property: lastFeature
     * {<OpenLayers.Feature.Vector>} The last feature that was handled.
     */
    lastFeature: null,

    /**
     * Property: down
     * {<OpenLayers.Pixel>} The location of the last mousedown.
     */
    down: null,

    /**
     * Property: up
     * {<OpenLayers.Pixel>} The location of the last mouseup.
     */
    up: null,

    /**
     * Property: touch
     * {Boolean} When a touchstart event is fired, touch will be true and all
     *     mouse related listeners will do nothing.
     */
    touch: false,
    
    /**
     * Property: clickTolerance
     * {Number} The number of pixels the mouse can move between mousedown
     *     and mouseup for the event to still be considered a click.
     *     Dragging the map should not trigger the click and clickout callbacks
     *     unless the map is moved by less than this tolerance. Defaults to 4.
     */
    clickTolerance: 4,

    /**
     * Property: geometryTypes
     * To restrict dragging to a limited set of geometry types, send a list
     * of strings corresponding to the geometry class names.
     * 
     * @type Array(String)
     */
    geometryTypes: null,

    /**
     * Property: stopClick
     * {Boolean} If stopClick is set to true, handled clicks do not
     *      propagate to other click listeners. Otherwise, handled clicks
     *      do propagate. Unhandled clicks always propagate, whatever the
     *      value of stopClick. Defaults to true.
     */
    stopClick: true,

    /**
     * Property: stopDown
     * {Boolean} If stopDown is set to true, handled mousedowns do not
     *      propagate to other mousedown listeners. Otherwise, handled
     *      mousedowns do propagate. Unhandled mousedowns always propagate,
     *      whatever the value of stopDown. Defaults to true.
     */
    stopDown: true,

    /**
     * Property: stopUp
     * {Boolean} If stopUp is set to true, handled mouseups do not
     *      propagate to other mouseup listeners. Otherwise, handled mouseups
     *      do propagate. Unhandled mouseups always propagate, whatever the
     *      value of stopUp. Defaults to false.
     */
    stopUp: false,
    
    /**
     * Constructor: OpenLayers.Handler.Feature
     *
     * Parameters:
     * control - {<OpenLayers.Control>} 
     * layer - {<OpenLayers.Layer.Vector>}
     * callbacks - {Object} An object with a 'over' property whos value is
     *     a function to be called when the mouse is over a feature. The 
     *     callback should expect to recieve a single argument, the feature.
     * options - {Object} 
     */
    initialize: function(control, layer, callbacks, options) {
        OpenLayers.Handler.prototype.initialize.apply(this, [control, callbacks, options]);
        this.layer = layer;
    },

    /**
     * Method: touchstart
     * Handle touchstart events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchstart: function(evt) {
        if(!this.touch) {
            this.touch =  true;
            this.map.events.un({
                mousedown: this.mousedown,
                mouseup: this.mouseup,
                mousemove: this.mousemove,
                click: this.click,
                dblclick: this.dblclick,
                scope: this
            });
        }
        return OpenLayers.Event.isMultiTouch(evt) ?
                true : this.mousedown(evt);
    },

    /**
     * Method: touchmove
     * Handle touchmove events. We just prevent the browser default behavior,
     *    for Android Webkit not to select text when moving the finger after
     *    selecting a feature.
     *
     * Parameters:
     * evt - {Event}
     */
    touchmove: function(evt) {
        OpenLayers.Event.stop(evt);
    },

    /**
     * Method: mousedown
     * Handle mouse down.  Stop propagation if a feature is targeted by this
     *     event (stops map dragging during feature selection).
     * 
     * Parameters:
     * evt - {Event} 
     */
    mousedown: function(evt) {
        // Feature selection is only done with a left click. Other handlers may stop the
        // propagation of left-click mousedown events but not right-click mousedown events.
        // This mismatch causes problems when comparing the location of the down and up
        // events in the click function so it is important ignore right-clicks.
        if (OpenLayers.Event.isLeftClick(evt) || OpenLayers.Event.isSingleTouch(evt)) {
            this.down = evt.xy;
        }
        return this.handle(evt) ? !this.stopDown : true;
    },
    
    /**
     * Method: mouseup
     * Handle mouse up.  Stop propagation if a feature is targeted by this
     *     event.
     * 
     * Parameters:
     * evt - {Event} 
     */
    mouseup: function(evt) {
        this.up = evt.xy;
        return this.handle(evt) ? !this.stopUp : true;
    },

    /**
     * Method: click
     * Handle click.  Call the "click" callback if click on a feature,
     *     or the "clickout" callback if click outside any feature.
     * 
     * Parameters:
     * evt - {Event} 
     *
     * Returns:
     * {Boolean}
     */
    click: function(evt) {
        return this.handle(evt) ? !this.stopClick : true;
    },
        
    /**
     * Method: mousemove
     * Handle mouse moves.  Call the "over" callback if moving in to a feature,
     *     or the "out" callback if moving out of a feature.
     * 
     * Parameters:
     * evt - {Event} 
     *
     * Returns:
     * {Boolean}
     */
    mousemove: function(evt) {
        if (!this.callbacks['over'] && !this.callbacks['out']) {
            return true;
        }     
        this.handle(evt);
        return true;
    },
    
    /**
     * Method: dblclick
     * Handle dblclick.  Call the "dblclick" callback if dblclick on a feature.
     *
     * Parameters:
     * evt - {Event} 
     *
     * Returns:
     * {Boolean}
     */
    dblclick: function(evt) {
        return !this.handle(evt);
    },

    /**
     * Method: geometryTypeMatches
     * Return true if the geometry type of the passed feature matches
     *     one of the geometry types in the geometryTypes array.
     *
     * Parameters:
     * feature - {<OpenLayers.Vector.Feature>}
     *
     * Returns:
     * {Boolean}
     */
    geometryTypeMatches: function(feature) {
        return this.geometryTypes == null ||
            OpenLayers.Util.indexOf(this.geometryTypes,
                                    feature.geometry.CLASS_NAME) > -1;
    },

    /**
     * Method: handle
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} The event occurred over a relevant feature.
     */
    handle: function(evt) {
        if(this.feature && !this.feature.layer) {
            // feature has been destroyed
            this.feature = null;
        }
        var type = evt.type;
        var handled = false;
        var previouslyIn = !!(this.feature); // previously in a feature
        var click = (type == "click" || type == "dblclick" || type == "touchstart");
        this.feature = this.layer.getFeatureFromEvent(evt);
        if(this.feature && !this.feature.layer) {
            // feature has been destroyed
            this.feature = null;
        }
        if(this.lastFeature && !this.lastFeature.layer) {
            // last feature has been destroyed
            this.lastFeature = null;
        }
        if(this.feature) {
            if(type === "touchstart") {
                // stop the event to prevent Android Webkit from
                // "flashing" the map div
                OpenLayers.Event.stop(evt);
            }
            var inNew = (this.feature != this.lastFeature);
            if(this.geometryTypeMatches(this.feature)) {
                // in to a feature
                if(previouslyIn && inNew) {
                    // out of last feature and in to another
                    if(this.lastFeature) {
                        this.triggerCallback(type, 'out', [this.lastFeature]);
                    }
                    this.triggerCallback(type, 'in', [this.feature]);
                } else if(!previouslyIn || click) {
                    // in feature for the first time
                    this.triggerCallback(type, 'in', [this.feature]);
                }
                this.lastFeature = this.feature;
                handled = true;
            } else {
                // not in to a feature
                if(this.lastFeature && (previouslyIn && inNew || click)) {
                    // out of last feature for the first time
                    this.triggerCallback(type, 'out', [this.lastFeature]);
                }
                // next time the mouse goes in a feature whose geometry type
                // doesn't match we don't want to call the 'out' callback
                // again, so let's set this.feature to null so that
                // previouslyIn will evaluate to false the next time
                // we enter handle. Yes, a bit hackish...
                this.feature = null;
            }
        } else {
            if(this.lastFeature && (previouslyIn || click)) {
                this.triggerCallback(type, 'out', [this.lastFeature]);
            }
        }
        return handled;
    },
    
    /**
     * Method: triggerCallback
     * Call the callback keyed in the event map with the supplied arguments.
     *     For click and clickout, the <clickTolerance> is checked first.
     *
     * Parameters:
     * type - {String}
     */
    triggerCallback: function(type, mode, args) {
        var key = this.EVENTMAP[type][mode];
        if(key) {
            if(type == 'click' && this.up && this.down) {
                // for click/clickout, only trigger callback if tolerance is met
                var dpx = Math.sqrt(
                    Math.pow(this.up.x - this.down.x, 2) +
                    Math.pow(this.up.y - this.down.y, 2)
                );
                if(dpx <= this.clickTolerance) {
                    this.callback(key, args);
                }
            } else {
                this.callback(key, args);
            }
        }
    },

    /**
     * Method: activate 
     * Turn on the handler.  Returns false if the handler was already active.
     *
     * Returns:
     * {Boolean}
     */
    activate: function() {
        var activated = false;
        if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            this.moveLayerToTop();
            this.map.events.on({
                "removelayer": this.handleMapEvents,
                "changelayer": this.handleMapEvents,
                scope: this
            });
            activated = true;
        }
        return activated;
    },
    
    /**
     * Method: deactivate 
     * Turn off the handler.  Returns false if the handler was already active.
     *
     * Returns: 
     * {Boolean}
     */
    deactivate: function() {
        var deactivated = false;
        if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            this.moveLayerBack();
            this.feature = null;
            this.lastFeature = null;
            this.down = null;
            this.up = null;
            this.touch = false;
            this.map.events.un({
                "removelayer": this.handleMapEvents,
                "changelayer": this.handleMapEvents,
                scope: this
            });
            deactivated = true;
        }
        return deactivated;
    },
    
    /**
     * Method: handleMapEvents
     * 
     * Parameters:
     * evt - {Object}
     */
    handleMapEvents: function(evt) {
        if (evt.type == "removelayer" || evt.property == "order") {
            this.moveLayerToTop();
        }
    },
    
    /**
     * Method: moveLayerToTop
     * Moves the layer for this handler to the top, so mouse events can reach
     * it.
     */
    moveLayerToTop: function() {
        var index = Math.max(this.map.Z_INDEX_BASE['Feature'] - 1,
            this.layer.getZIndex()) + 1;
        this.layer.setZIndex(index);
        
    },
    
    /**
     * Method: moveLayerBack
     * Moves the layer back to the position determined by the map's layers
     * array.
     */
    moveLayerBack: function() {
        var index = this.layer.getZIndex() - 1;
        if (index >= this.map.Z_INDEX_BASE['Feature']) {
            this.layer.setZIndex(index);
        } else {
            this.map.setLayerZIndex(this.layer,
                this.map.getLayerIndex(this.layer));
        }
    },

    CLASS_NAME: "OpenLayers.Handler.Feature"
});
/* ======================================================================
    OpenLayers/Control/DragFeature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Drag.js
 * @requires OpenLayers/Handler/Feature.js
 */

/**
 * Class: OpenLayers.Control.DragFeature
 * The DragFeature control moves a feature with a drag of the mouse. Create a
 * new control with the <OpenLayers.Control.DragFeature> constructor.
 *
 * Inherits From:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.DragFeature = OpenLayers.Class(OpenLayers.Control, {

    /**
     * APIProperty: geometryTypes
     * {Array(String)} To restrict dragging to a limited set of geometry types,
     *     send a list of strings corresponding to the geometry class names.
     */
    geometryTypes: null,
    
    /**
     * APIProperty: onStart
     * {Function} Define this function if you want to know when a drag starts.
     *     The function should expect to receive two arguments: the feature
     *     that is about to be dragged and the pixel location of the mouse.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature that is about to be
     *     dragged.
     * pixel - {<OpenLayers.Pixel>} The pixel location of the mouse.
     */
    onStart: function(feature, pixel) {},

    /**
     * APIProperty: onDrag
     * {Function} Define this function if you want to know about each move of a
     *     feature. The function should expect to receive two arguments: the
     *     feature that is being dragged and the pixel location of the mouse.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature that was dragged.
     * pixel - {<OpenLayers.Pixel>} The pixel location of the mouse.
     */
    onDrag: function(feature, pixel) {},

    /**
     * APIProperty: onComplete
     * {Function} Define this function if you want to know when a feature is
     *     done dragging. The function should expect to receive two arguments:
     *     the feature that is being dragged and the pixel location of the
     *     mouse.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature that was dragged.
     * pixel - {<OpenLayers.Pixel>} The pixel location of the mouse.
     */
    onComplete: function(feature, pixel) {},

    /**
     * APIProperty: onEnter
     * {Function} Define this function if you want to know when the mouse
     *     goes over a feature and thereby makes this feature a candidate
     *     for dragging.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature that is ready
     *     to be dragged.
     */
    onEnter: function(feature) {},

    /**
     * APIProperty: onLeave
     * {Function} Define this function if you want to know when the mouse
     *     goes out of the feature that was dragged.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature that was dragged.
     */
    onLeave: function(feature) {},

    /**
     * APIProperty: documentDrag
     * {Boolean} If set to true, mouse dragging will continue even if the
     *     mouse cursor leaves the map viewport. Default is false.
     */
    documentDrag: false,
    
    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>}
     */
    layer: null,
    
    /**
     * Property: feature
     * {<OpenLayers.Feature.Vector>}
     */
    feature: null,

    /**
     * Property: dragCallbacks
     * {Object} The functions that are sent to the drag handler for callback.
     */
    dragCallbacks: {},

    /**
     * Property: featureCallbacks
     * {Object} The functions that are sent to the feature handler for callback.
     */
    featureCallbacks: {},
    
    /**
     * Property: lastPixel
     * {<OpenLayers.Pixel>}
     */
    lastPixel: null,

    /**
     * Constructor: OpenLayers.Control.DragFeature
     * Create a new control to drag features.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} The layer containing features to be
     *     dragged.
     * options - {Object} Optional object whose properties will be set on the
     *     control.
     */
    initialize: function(layer, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.layer = layer;
        this.handlers = {
            drag: new OpenLayers.Handler.Drag(
                this, OpenLayers.Util.extend({
                    down: this.downFeature,
                    move: this.moveFeature,
                    up: this.upFeature,
                    out: this.cancel,
                    done: this.doneDragging
                }, this.dragCallbacks), {
                    documentDrag: this.documentDrag
                }
            ),
            feature: new OpenLayers.Handler.Feature(
                this, this.layer, OpenLayers.Util.extend({
                    // 'click' and 'clickout' callback are for the mobile
                    // support: no 'over' or 'out' in touch based browsers.
                    click: this.clickFeature,
                    clickout: this.clickoutFeature,
                    over: this.overFeature,
                    out: this.outFeature
                }, this.featureCallbacks),
                {geometryTypes: this.geometryTypes}
            )
        };
    },

    /**
     * Method: clickFeature
     * Called when the feature handler detects a click-in on a feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     */
    clickFeature: function(feature) {
        if (this.handlers.feature.touch && !this.over && this.overFeature(feature)) {
            this.handlers.drag.dragstart(this.handlers.feature.evt);
            // to let the events propagate to the feature handler (click callback)
            this.handlers.drag.stopDown = false;
        }
    },

    /**
     * Method: clickoutFeature
     * Called when the feature handler detects a click-out on a feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     */
    clickoutFeature: function(feature) {
        if (this.handlers.feature.touch && this.over) {
            this.outFeature(feature);
            this.handlers.drag.stopDown = true;
        }
    },

    /**
     * APIMethod: destroy
     * Take care of things that are not handled in superclass
     */
    destroy: function() {
        this.layer = null;
        OpenLayers.Control.prototype.destroy.apply(this, []);
    },

    /**
     * APIMethod: activate
     * Activate the control and the feature handler.
     * 
     * Returns:
     * {Boolean} Successfully activated the control and feature handler.
     */
    activate: function() {
        return (this.handlers.feature.activate() &&
                OpenLayers.Control.prototype.activate.apply(this, arguments));
    },

    /**
     * APIMethod: deactivate
     * Deactivate the control and all handlers.
     * 
     * Returns:
     * {Boolean} Successfully deactivated the control.
     */
    deactivate: function() {
        // the return from the handlers is unimportant in this case
        this.handlers.drag.deactivate();
        this.handlers.feature.deactivate();
        this.feature = null;
        this.dragging = false;
        this.lastPixel = null;
        OpenLayers.Element.removeClass(
            this.map.viewPortDiv, this.displayClass + "Over"
        );
        return OpenLayers.Control.prototype.deactivate.apply(this, arguments);
    },

    /**
     * Method: overFeature
     * Called when the feature handler detects a mouse-over on a feature.
     *     This activates the drag handler.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The selected feature.
     *
     * Returns:
     * {Boolean} Successfully activated the drag handler.
     */
    overFeature: function(feature) {
        var activated = false;
        if(!this.handlers.drag.dragging) {
            this.feature = feature;
            this.handlers.drag.activate();
            activated = true;
            this.over = true;
            OpenLayers.Element.addClass(this.map.viewPortDiv, this.displayClass + "Over");
            this.onEnter(feature);
        } else {
            if(this.feature.id == feature.id) {
                this.over = true;
            } else {
                this.over = false;
            }
        }
        return activated;
    },

    /**
     * Method: downFeature
     * Called when the drag handler detects a mouse-down.
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} Location of the mouse event.
     */
    downFeature: function(pixel) {
        this.lastPixel = pixel;
        this.onStart(this.feature, pixel);
    },

    /**
     * Method: moveFeature
     * Called when the drag handler detects a mouse-move.  Also calls the
     *     optional onDrag method.
     * 
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} Location of the mouse event.
     */
    moveFeature: function(pixel) {
        var res = this.map.getResolution();
        this.feature.geometry.move(res * (pixel.x - this.lastPixel.x),
                                   res * (this.lastPixel.y - pixel.y));
        this.layer.drawFeature(this.feature);
        this.lastPixel = pixel;
        this.onDrag(this.feature, pixel);
    },

    /**
     * Method: upFeature
     * Called when the drag handler detects a mouse-up.
     * 
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} Location of the mouse event.
     */
    upFeature: function(pixel) {
        if(!this.over) {
            this.handlers.drag.deactivate();
        }
    },

    /**
     * Method: doneDragging
     * Called when the drag handler is done dragging.
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} The last event pixel location.  If this event
     *     came from a mouseout, this may not be in the map viewport.
     */
    doneDragging: function(pixel) {
        this.onComplete(this.feature, pixel);
    },

    /**
     * Method: outFeature
     * Called when the feature handler detects a mouse-out on a feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature that the mouse left.
     */
    outFeature: function(feature) {
        if(!this.handlers.drag.dragging) {
            this.over = false;
            this.handlers.drag.deactivate();
            OpenLayers.Element.removeClass(
                this.map.viewPortDiv, this.displayClass + "Over"
            );
            this.onLeave(feature);
            this.feature = null;
        } else {
            if(this.feature.id == feature.id) {
                this.over = false;
            }
        }
    },
        
    /**
     * Method: cancel
     * Called when the drag handler detects a mouse-out (from the map viewport).
     */
    cancel: function() {
        this.handlers.drag.deactivate();
        this.over = false;
    },

    /**
     * Method: setMap
     * Set the map property for the control and all handlers.
     *
     * Parameters: 
     * map - {<OpenLayers.Map>} The control's map.
     */
    setMap: function(map) {
        this.handlers.drag.setMap(map);
        this.handlers.feature.setMap(map);
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
    },

    CLASS_NAME: "OpenLayers.Control.DragFeature"
});
/* ======================================================================
    OpenLayers/StyleMap.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Style.js
 * @requires OpenLayers/Feature/Vector.js
 */
 
/**
 * Class: OpenLayers.StyleMap
 */
OpenLayers.StyleMap = OpenLayers.Class({
    
    /**
     * Property: styles
     * {Object} Hash of {<OpenLayers.Style>}, keyed by names of well known
     * rendering intents (e.g. "default", "temporary", "select", "delete").
     */
    styles: null,
    
    /**
     * Property: extendDefault
     * {Boolean} if true, every render intent will extend the symbolizers
     * specified for the "default" intent at rendering time. Otherwise, every
     * rendering intent will be treated as a completely independent style.
     */
    extendDefault: true,
    
    /**
     * Constructor: OpenLayers.StyleMap
     * 
     * Parameters:
     * style   - {Object} Optional. Either a style hash, or a style object, or
     *           a hash of style objects (style hashes) keyed by rendering
     *           intent. If just one style hash or style object is passed,
     *           this will be used for all known render intents (default,
     *           select, temporary)
     * options - {Object} optional hash of additional options for this
     *           instance
     */
    initialize: function (style, options) {
        this.styles = {
            "default": new OpenLayers.Style(
                OpenLayers.Feature.Vector.style["default"]),
            "select": new OpenLayers.Style(
                OpenLayers.Feature.Vector.style["select"]),
            "temporary": new OpenLayers.Style(
                OpenLayers.Feature.Vector.style["temporary"]),
            "delete": new OpenLayers.Style(
                OpenLayers.Feature.Vector.style["delete"])
        };
        
        // take whatever the user passed as style parameter and convert it
        // into parts of stylemap.
        if(style instanceof OpenLayers.Style) {
            // user passed a style object
            this.styles["default"] = style;
            this.styles["select"] = style;
            this.styles["temporary"] = style;
            this.styles["delete"] = style;
        } else if(typeof style == "object") {
            for(var key in style) {
                if(style[key] instanceof OpenLayers.Style) {
                    // user passed a hash of style objects
                    this.styles[key] = style[key];
                } else if(typeof style[key] == "object") {
                    // user passsed a hash of style hashes
                    this.styles[key] = new OpenLayers.Style(style[key]);
                } else {
                    // user passed a style hash (i.e. symbolizer)
                    this.styles["default"] = new OpenLayers.Style(style);
                    this.styles["select"] = new OpenLayers.Style(style);
                    this.styles["temporary"] = new OpenLayers.Style(style);
                    this.styles["delete"] = new OpenLayers.Style(style);
                    break;
                }
            }
        }
        OpenLayers.Util.extend(this, options);
    },

    /**
     * Method: destroy
     */
    destroy: function() {
        for(var key in this.styles) {
            this.styles[key].destroy();
        }
        this.styles = null;
    },
    
    /**
     * Method: createSymbolizer
     * Creates the symbolizer for a feature for a render intent.
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature>} The feature to evaluate the rules
     *           of the intended style against.
     * intent  - {String} The intent determines the symbolizer that will be
     *           used to draw the feature. Well known intents are "default"
     *           (for just drawing the features), "select" (for selected
     *           features) and "temporary" (for drawing features).
     * 
     * Returns:
     * {Object} symbolizer hash
     */
    createSymbolizer: function(feature, intent) {
        if(!feature) {
            feature = new OpenLayers.Feature.Vector();
        }
        if(!this.styles[intent]) {
            intent = "default";
        }
        feature.renderIntent = intent;
        var defaultSymbolizer = {};
        if(this.extendDefault && intent != "default") {
            defaultSymbolizer = this.styles["default"].createSymbolizer(feature);
        }
        return OpenLayers.Util.extend(defaultSymbolizer,
            this.styles[intent].createSymbolizer(feature));
    },
    
    /**
     * Method: addUniqueValueRules
     * Convenience method to create comparison rules for unique values of a
     * property. The rules will be added to the style object for a specified
     * rendering intent. This method is a shortcut for creating something like
     * the "unique value legends" familiar from well known desktop GIS systems
     * 
     * Parameters:
     * renderIntent - {String} rendering intent to add the rules to
     * property     - {String} values of feature attributes to create the
     *                rules for
     * symbolizers  - {Object} Hash of symbolizers, keyed by the desired
     *                property values 
     * context      - {Object} An optional object with properties that
     *                symbolizers' property values should be evaluated
     *                against. If no context is specified, feature.attributes
     *                will be used
     */
    addUniqueValueRules: function(renderIntent, property, symbolizers, context) {
        var rules = [];
        for (var value in symbolizers) {
            rules.push(new OpenLayers.Rule({
                symbolizer: symbolizers[value],
                context: context,
                filter: new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.EQUAL_TO,
                    property: property,
                    value: value
                })
            }));
        }
        this.styles[renderIntent].addRules(rules);
    },

    CLASS_NAME: "OpenLayers.StyleMap"
});
/* ======================================================================
    OpenLayers/Layer/Vector.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer.js
 * @requires OpenLayers/Renderer.js
 * @requires OpenLayers/StyleMap.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Console.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Class: OpenLayers.Layer.Vector
 * Instances of OpenLayers.Layer.Vector are used to render vector data from
 *     a variety of sources. Create a new vector layer with the
 *     <OpenLayers.Layer.Vector> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Layer>
 */
OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {

    /**
     * APIProperty: events
     * {<OpenLayers.Events>}
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * layer.events.register(type, obj, listener);
     * (end)
     *
     * Listeners will be called with a reference to an event object.  The
     *     properties of this event depends on exactly what happened.
     *
     * All event objects have at least the following properties:
     * object - {Object} A reference to layer.events.object.
     * element - {DOMElement} A reference to layer.events.element.
     *
     * Supported map event types (in addition to those from <OpenLayers.Layer.events>):
     * beforefeatureadded - Triggered before a feature is added.  Listeners
     *      will receive an object with a *feature* property referencing the
     *      feature to be added.  To stop the feature from being added, a
     *      listener should return false.
     * beforefeaturesadded - Triggered before an array of features is added.
     *      Listeners will receive an object with a *features* property
     *      referencing the feature to be added. To stop the features from
     *      being added, a listener should return false.
     * featureadded - Triggered after a feature is added.  The event
     *      object passed to listeners will have a *feature* property with a
     *      reference to the added feature.
     * featuresadded - Triggered after features are added.  The event
     *      object passed to listeners will have a *features* property with a
     *      reference to an array of added features.
     * beforefeatureremoved - Triggered before a feature is removed. Listeners
     *      will receive an object with a *feature* property referencing the
     *      feature to be removed.
     * beforefeaturesremoved - Triggered before multiple features are removed. 
     *      Listeners will receive an object with a *features* property
     *      referencing the features to be removed.
     * featureremoved - Triggerd after a feature is removed. The event
     *      object passed to listeners will have a *feature* property with a
     *      reference to the removed feature.
     * featuresremoved - Triggered after features are removed. The event
     *      object passed to listeners will have a *features* property with a
     *      reference to an array of removed features.
     * beforefeatureselected - Triggered before a feature is selected.  Listeners
     *      will receive an object with a *feature* property referencing the
     *      feature to be selected. To stop the feature from being selectd, a
     *      listener should return false.
     * featureselected - Triggered after a feature is selected.  Listeners
     *      will receive an object with a *feature* property referencing the
     *      selected feature.
     * featureunselected - Triggered after a feature is unselected.
     *      Listeners will receive an object with a *feature* property
     *      referencing the unselected feature.
     * beforefeaturemodified - Triggered when a feature is selected to 
     *      be modified.  Listeners will receive an object with a *feature* 
     *      property referencing the selected feature.
     * featuremodified - Triggered when a feature has been modified.
     *      Listeners will receive an object with a *feature* property referencing 
     *      the modified feature.
     * afterfeaturemodified - Triggered when a feature is finished being modified.
     *      Listeners will receive an object with a *feature* property referencing 
     *      the modified feature.
     * vertexmodified - Triggered when a vertex within any feature geometry
     *      has been modified.  Listeners will receive an object with a
     *      *feature* property referencing the modified feature, a *vertex*
     *      property referencing the vertex modified (always a point geometry),
     *      and a *pixel* property referencing the pixel location of the
     *      modification.
     * vertexremoved - Triggered when a vertex within any feature geometry
     *      has been deleted.  Listeners will receive an object with a
     *      *feature* property referencing the modified feature, a *vertex*
     *      property referencing the vertex modified (always a point geometry),
     *      and a *pixel* property referencing the pixel location of the
     *      removal.
     * sketchstarted - Triggered when a feature sketch bound for this layer
     *      is started.  Listeners will receive an object with a *feature*
     *      property referencing the new sketch feature and a *vertex* property
     *      referencing the creation point.
     * sketchmodified - Triggered when a feature sketch bound for this layer
     *      is modified.  Listeners will receive an object with a *vertex*
     *      property referencing the modified vertex and a *feature* property
     *      referencing the sketch feature.
     * sketchcomplete - Triggered when a feature sketch bound for this layer
     *      is complete.  Listeners will receive an object with a *feature*
     *      property referencing the sketch feature.  By returning false, a
     *      listener can stop the sketch feature from being added to the layer.
     * refresh - Triggered when something wants a strategy to ask the protocol
     *      for a new set of features.
     */

    /**
     * APIProperty: isBaseLayer
     * {Boolean} The layer is a base layer.  Default is false.  Set this property
     * in the layer options.
     */
    isBaseLayer: false,

    /** 
     * APIProperty: isFixed
     * {Boolean} Whether the layer remains in one place while dragging the
     * map.
     */
    isFixed: false,

    /** 
     * APIProperty: features
     * {Array(<OpenLayers.Feature.Vector>)} 
     */
    features: null,
    
    /** 
     * Property: filter
     * {<OpenLayers.Filter>} The filter set in this layer,
     *     a strategy launching read requests can combined
     *     this filter with its own filter.
     */
    filter: null,
    
    /** 
     * Property: selectedFeatures
     * {Array(<OpenLayers.Feature.Vector>)} 
     */
    selectedFeatures: null,
    
    /**
     * Property: unrenderedFeatures
     * {Object} hash of features, keyed by feature.id, that the renderer
     *     failed to draw
     */
    unrenderedFeatures: null,

    /**
     * APIProperty: reportError
     * {Boolean} report friendly error message when loading of renderer
     * fails.
     */
    reportError: true, 

    /** 
     * APIProperty: style
     * {Object} Default style for the layer
     */
    style: null,
    
    /**
     * Property: styleMap
     * {<OpenLayers.StyleMap>}
     */
    styleMap: null,
    
    /**
     * Property: strategies
     * {Array(<OpenLayers.Strategy>})} Optional list of strategies for the layer.
     */
    strategies: null,
    
    /**
     * Property: protocol
     * {<OpenLayers.Protocol>} Optional protocol for the layer.
     */
    protocol: null,
    
    /**
     * Property: renderers
     * {Array(String)} List of supported Renderer classes. Add to this list to
     * add support for additional renderers. This list is ordered:
     * the first renderer which returns true for the  'supported()'
     * method will be used, if not defined in the 'renderer' option.
     */
    renderers: ['SVG', 'VML', 'Canvas'],
    
    /** 
     * Property: renderer
     * {<OpenLayers.Renderer>}
     */
    renderer: null,
    
    /**
     * APIProperty: rendererOptions
     * {Object} Options for the renderer. See {<OpenLayers.Renderer>} for
     *     supported options.
     */
    rendererOptions: null,
    
    /** 
     * APIProperty: geometryType
     * {String} geometryType allows you to limit the types of geometries this
     * layer supports. This should be set to something like
     * "OpenLayers.Geometry.Point" to limit types.
     */
    geometryType: null,

    /** 
     * Property: drawn
     * {Boolean} Whether the Vector Layer features have been drawn yet.
     */
    drawn: false,
    
    /** 
     * APIProperty: ratio
     * {Float} This specifies the ratio of the size of the visiblity of the Vector Layer features to the size of the map.
     */   
    ratio: 1,

    /**
     * Constructor: OpenLayers.Layer.Vector
     * Create a new vector layer
     *
     * Parameters:
     * name - {String} A name for the layer
     * options - {Object} Optional object with non-default properties to set on
     *           the layer.
     *
     * Returns:
     * {<OpenLayers.Layer.Vector>} A new vector layer
     */
    initialize: function(name, options) {
        OpenLayers.Layer.prototype.initialize.apply(this, arguments);

        // allow user-set renderer, otherwise assign one
        if (!this.renderer || !this.renderer.supported()) {  
            this.assignRenderer();
        }

        // if no valid renderer found, display error
        if (!this.renderer || !this.renderer.supported()) {
            this.renderer = null;
            this.displayError();
        } 

        if (!this.styleMap) {
            this.styleMap = new OpenLayers.StyleMap();
        }

        this.features = [];
        this.selectedFeatures = [];
        this.unrenderedFeatures = {};
        
        // Allow for custom layer behavior
        if(this.strategies){
            for(var i=0, len=this.strategies.length; i<len; i++) {
                this.strategies[i].setLayer(this);
            }
        }

    },

    /**
     * APIMethod: destroy
     * Destroy this layer
     */
    destroy: function() {
        if (this.strategies) {
            var strategy, i, len;
            for(i=0, len=this.strategies.length; i<len; i++) {
                strategy = this.strategies[i];
                if(strategy.autoDestroy) {
                    strategy.destroy();
                }
            }
            this.strategies = null;
        }
        if (this.protocol) {
            if(this.protocol.autoDestroy) {
                this.protocol.destroy();
            }
            this.protocol = null;
        }
        this.destroyFeatures();
        this.features = null;
        this.selectedFeatures = null;
        this.unrenderedFeatures = null;
        if (this.renderer) {
            this.renderer.destroy();
        }
        this.renderer = null;
        this.geometryType = null;
        this.drawn = null;
        OpenLayers.Layer.prototype.destroy.apply(this, arguments);  
    },

    /**
     * Method: clone
     * Create a clone of this layer.
     * 
     * Note: Features of the layer are also cloned.
     *
     * Returns:
     * {<OpenLayers.Layer.Vector>} An exact clone of this layer
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.Vector(this.name, this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here
        var features = this.features;
        var len = features.length;
        var clonedFeatures = new Array(len);
        for(var i=0; i<len; ++i) {
            clonedFeatures[i] = features[i].clone();
        }
        obj.features = clonedFeatures;

        return obj;
    },    
    
    /**
     * Method: refresh
     * Ask the layer to request features again and redraw them.  Triggers
     *     the refresh event if the layer is in range and visible.
     *
     * Parameters:
     * obj - {Object} Optional object with properties for any listener of
     *     the refresh event.
     */
    refresh: function(obj) {
        if(this.calculateInRange() && this.visibility) {
            this.events.triggerEvent("refresh", obj);
        }
    },

    /** 
     * Method: assignRenderer
     * Iterates through the available renderer implementations and selects 
     * and assigns the first one whose "supported()" function returns true.
     */    
    assignRenderer: function()  {
        for (var i=0, len=this.renderers.length; i<len; i++) {
            var rendererClass = this.renderers[i];
            var renderer = (typeof rendererClass == "function") ?
                rendererClass :
                OpenLayers.Renderer[rendererClass];
            if (renderer && renderer.prototype.supported()) {
                this.renderer = new renderer(this.div, this.rendererOptions);
                break;
            }  
        }  
    },

    /** 
     * Method: displayError 
     * Let the user know their browser isn't supported.
     */
    displayError: function() {
        if (this.reportError) {
            OpenLayers.Console.userError(OpenLayers.i18n("browserNotSupported", 
                                     {renderers: this. renderers.join('\n')}));
        }    
    },

    /** 
     * Method: setMap
     * The layer has been added to the map. 
     * 
     * If there is no renderer set, the layer can't be used. Remove it.
     * Otherwise, give the renderer a reference to the map and set its size.
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {        
        OpenLayers.Layer.prototype.setMap.apply(this, arguments);

        if (!this.renderer) {
            this.map.removeLayer(this);
        } else {
            this.renderer.map = this.map;

            var newSize = this.map.getSize();
            newSize.w = newSize.w * this.ratio;
            newSize.h = newSize.h * this.ratio;
            this.renderer.setSize(newSize);
        }
    },

    /**
     * Method: afterAdd
     * Called at the end of the map.addLayer sequence.  At this point, the map
     *     will have a base layer.  Any autoActivate strategies will be
     *     activated here.
     */
    afterAdd: function() {
        if(this.strategies) {
            var strategy, i, len;
            for(i=0, len=this.strategies.length; i<len; i++) {
                strategy = this.strategies[i];
                if(strategy.autoActivate) {
                    strategy.activate();
                }
            }
        }
    },

    /**
     * Method: removeMap
     * The layer has been removed from the map.
     *
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        this.drawn = false;
        if(this.strategies) {
            var strategy, i, len;
            for(i=0, len=this.strategies.length; i<len; i++) {
                strategy = this.strategies[i];
                if(strategy.autoActivate) {
                    strategy.deactivate();
                }
            }
        }
    },
    
    /**
     * Method: onMapResize
     * Notify the renderer of the change in size. 
     * 
     */
    onMapResize: function() {
        OpenLayers.Layer.prototype.onMapResize.apply(this, arguments);
        
        var newSize = this.map.getSize();
        newSize.w = newSize.w * this.ratio;
        newSize.h = newSize.h * this.ratio;
        this.renderer.setSize(newSize);
    },

    /**
     * Method: moveTo
     *  Reset the vector layer's div so that it once again is lined up with 
     *   the map. Notify the renderer of the change of extent, and in the
     *   case of a change of zoom level (resolution), have the 
     *   renderer redraw features.
     * 
     *  If the layer has not yet been drawn, cycle through the layer's 
     *   features and draw each one.
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     * zoomChanged - {Boolean} 
     * dragging - {Boolean} 
     */
    moveTo: function(bounds, zoomChanged, dragging) {
        OpenLayers.Layer.prototype.moveTo.apply(this, arguments);
        
        var coordSysUnchanged = true;
        if (!dragging) {
            this.renderer.root.style.visibility = 'hidden';

            var viewSize = this.map.getSize(),
                viewWidth = viewSize.w,
                viewHeight = viewSize.h,
                offsetLeft = (viewWidth / 2 * this.ratio) - viewWidth / 2,
                offsetTop = (viewHeight / 2 * this.ratio) - viewHeight / 2;
            offsetLeft += parseInt(this.map.layerContainerDiv.style.left, 10);
            offsetLeft = -Math.round(offsetLeft);
            offsetTop += parseInt(this.map.layerContainerDiv.style.top, 10);
            offsetTop = -Math.round(offsetTop);

            this.div.style.left = offsetLeft + 'px';
            this.div.style.top = offsetTop + 'px';

            var extent = this.map.getExtent().scale(this.ratio);
            coordSysUnchanged = this.renderer.setExtent(extent, zoomChanged);

            this.renderer.root.style.visibility = 'visible';

            // Force a reflow on gecko based browsers to prevent jump/flicker.
            // This seems to happen on only certain configurations; it was originally
            // noticed in FF 2.0 and Linux.
            if (OpenLayers.IS_GECKO === true) {
                this.div.scrollLeft = this.div.scrollLeft;
            }
            
            if (!zoomChanged && coordSysUnchanged) {
                for (var i in this.unrenderedFeatures) {
                    var feature = this.unrenderedFeatures[i];
                    this.drawFeature(feature);
                }
            }
        }
        if (!this.drawn || zoomChanged || !coordSysUnchanged) {
            this.drawn = true;
            var feature;
            for(var i=0, len=this.features.length; i<len; i++) {
                this.renderer.locked = (i !== (len - 1));
                feature = this.features[i];
                this.drawFeature(feature);
            }
        }    
    },
    
    /** 
     * APIMethod: display
     * Hide or show the Layer
     * 
     * Parameters:
     * display - {Boolean}
     */
    display: function(display) {
        OpenLayers.Layer.prototype.display.apply(this, arguments);
        // we need to set the display style of the root in case it is attached
        // to a foreign layer
        var currentDisplay = this.div.style.display;
        if(currentDisplay != this.renderer.root.style.display) {
            this.renderer.root.style.display = currentDisplay;
        }
    },

    /**
     * APIMethod: addFeatures
     * Add Features to the layer.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} 
     * options - {Object}
     */
    addFeatures: function(features, options) {
        if (!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        
        var notify = !options || !options.silent;
        if(notify) {
            var event = {features: features};
            var ret = this.events.triggerEvent("beforefeaturesadded", event);
            if(ret === false) {
                return;
            }
            features = event.features;
        }
        
        // Track successfully added features for featuresadded event, since
        // beforefeatureadded can veto single features.
        var featuresAdded = [];
        for (var i=0, len=features.length; i<len; i++) {
            if (i != (features.length - 1)) {
                this.renderer.locked = true;
            } else {
                this.renderer.locked = false;
            }    
            var feature = features[i];
            
            if (this.geometryType &&
              !(feature.geometry instanceof this.geometryType)) {
                throw new TypeError('addFeatures: component should be an ' +
                                    this.geometryType.prototype.CLASS_NAME);
              }

            //give feature reference to its layer
            feature.layer = this;

            if (!feature.style && this.style) {
                feature.style = OpenLayers.Util.extend({}, this.style);
            }

            if (notify) {
                if(this.events.triggerEvent("beforefeatureadded",
                                            {feature: feature}) === false) {
                    continue;
                }
                this.preFeatureInsert(feature);
            }

            featuresAdded.push(feature);
            this.features.push(feature);
            this.drawFeature(feature);
            
            if (notify) {
                this.events.triggerEvent("featureadded", {
                    feature: feature
                });
                this.onFeatureInsert(feature);
            }
        }
        
        if(notify) {
            this.events.triggerEvent("featuresadded", {features: featuresAdded});
        }
    },


    /**
     * APIMethod: removeFeatures
     * Remove features from the layer.  This erases any drawn features and
     *     removes them from the layer's control.  The beforefeatureremoved
     *     and featureremoved events will be triggered for each feature.  The
     *     featuresremoved event will be triggered after all features have
     *     been removed.  To supress event triggering, use the silent option.
     * 
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} List of features to be
     *     removed.
     * options - {Object} Optional properties for changing behavior of the
     *     removal.
     *
     * Valid options:
     * silent - {Boolean} Supress event triggering.  Default is false.
     */
    removeFeatures: function(features, options) {
        if(!features || features.length === 0) {
            return;
        }
        if (features === this.features) {
            return this.removeAllFeatures(options);
        }
        if (!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        if (features === this.selectedFeatures) {
            features = features.slice();
        }

        var notify = !options || !options.silent;
        
        if (notify) {
            this.events.triggerEvent(
                "beforefeaturesremoved", {features: features}
            );
        }

        for (var i = features.length - 1; i >= 0; i--) {
            // We remain locked so long as we're not at 0
            // and the 'next' feature has a geometry. We do the geometry check
            // because if all the features after the current one are 'null', we
            // won't call eraseGeometry, so we break the 'renderer functions
            // will always be called with locked=false *last*' rule. The end result
            // is a possible gratiutious unlocking to save a loop through the rest 
            // of the list checking the remaining features every time. So long as
            // null geoms are rare, this is probably okay.    
            if (i != 0 && features[i-1].geometry) {
                this.renderer.locked = true;
            } else {
                this.renderer.locked = false;
            }
    
            var feature = features[i];
            delete this.unrenderedFeatures[feature.id];

            if (notify) {
                this.events.triggerEvent("beforefeatureremoved", {
                    feature: feature
                });
            }

            this.features = OpenLayers.Util.removeItem(this.features, feature);
            // feature has no layer at this point
            feature.layer = null;

            if (feature.geometry) {
                this.renderer.eraseFeatures(feature);
            }
                    
            //in the case that this feature is one of the selected features, 
            // remove it from that array as well.
            if (OpenLayers.Util.indexOf(this.selectedFeatures, feature) != -1){
                OpenLayers.Util.removeItem(this.selectedFeatures, feature);
            }

            if (notify) {
                this.events.triggerEvent("featureremoved", {
                    feature: feature
                });
            }
        }

        if (notify) {
            this.events.triggerEvent("featuresremoved", {features: features});
        }
    },
    
    /** 
     * APIMethod: removeAllFeatures
     * Remove all features from the layer.
     *
     * Parameters:
     * options - {Object} Optional properties for changing behavior of the
     *     removal.
     *
     * Valid options:
     * silent - {Boolean} Supress event triggering.  Default is false.
     */
    removeAllFeatures: function(options) {
        var notify = !options || !options.silent;
        var features = this.features;
        if (notify) {
            this.events.triggerEvent(
                "beforefeaturesremoved", {features: features}
            );
        }
        var feature;
        for (var i = features.length-1; i >= 0; i--) {
            feature = features[i];
            if (notify) {
                this.events.triggerEvent("beforefeatureremoved", {
                    feature: feature
                });
            }
            feature.layer = null;
            if (notify) {
                this.events.triggerEvent("featureremoved", {
                    feature: feature
                });
            }
        }
        this.renderer.clear();
        this.features = [];
        this.unrenderedFeatures = {};
        this.selectedFeatures = [];
        if (notify) {
            this.events.triggerEvent("featuresremoved", {features: features});
        }
    },

    /**
     * APIMethod: destroyFeatures
     * Erase and destroy features on the layer.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} An optional array of
     *     features to destroy.  If not supplied, all features on the layer
     *     will be destroyed.
     * options - {Object}
     */
    destroyFeatures: function(features, options) {
        var all = (features == undefined); // evaluates to true if
                                           // features is null
        if(all) {
            features = this.features;
        }
        if(features) {
            this.removeFeatures(features, options);
            for(var i=features.length-1; i>=0; i--) {
                features[i].destroy();
            }
        }
    },

    /**
     * APIMethod: drawFeature
     * Draw (or redraw) a feature on the layer.  If the optional style argument
     * is included, this style will be used.  If no style is included, the
     * feature's style will be used.  If the feature doesn't have a style,
     * the layer's style will be used.
     * 
     * This function is not designed to be used when adding features to 
     * the layer (use addFeatures instead). It is meant to be used when
     * the style of a feature has changed, or in some other way needs to 
     * visually updated *after* it has already been added to a layer. You
     * must add the feature to the layer for most layer-related events to 
     * happen.
     *
     * Parameters: 
     * feature - {<OpenLayers.Feature.Vector>} 
     * style - {String | Object} Named render intent or full symbolizer object.
     */
    drawFeature: function(feature, style) {
        // don't try to draw the feature with the renderer if the layer is not 
        // drawn itself
        if (!this.drawn) {
            return;
        }
        if (typeof style != "object") {
            if(!style && feature.state === OpenLayers.State.DELETE) {
                style = "delete";
            }
            var renderIntent = style || feature.renderIntent;
            style = feature.style || this.style;
            if (!style) {
                style = this.styleMap.createSymbolizer(feature, renderIntent);
            }
        }
        
        var drawn = this.renderer.drawFeature(feature, style);
        //TODO remove the check for null when we get rid of Renderer.SVG
        if (drawn === false || drawn === null) {
            this.unrenderedFeatures[feature.id] = feature;
        } else {
            delete this.unrenderedFeatures[feature.id];
        }
    },
    
    /**
     * Method: eraseFeatures
     * Erase features from the layer.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} 
     */
    eraseFeatures: function(features) {
        this.renderer.eraseFeatures(features);
    },

    /**
     * Method: getFeatureFromEvent
     * Given an event, return a feature if the event occurred over one.
     * Otherwise, return null.
     *
     * Parameters:
     * evt - {Event} 
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A feature if one was under the event.
     */
    getFeatureFromEvent: function(evt) {
        if (!this.renderer) {
            throw new Error('getFeatureFromEvent called on layer with no ' +
                            'renderer. This usually means you destroyed a ' +
                            'layer, but not some handler which is associated ' +
                            'with it.');
        }
        var feature = null;
        var featureId = this.renderer.getFeatureIdFromEvent(evt);
        if (featureId) {
            if (typeof featureId === "string") {
                feature = this.getFeatureById(featureId);
            } else {
                feature = featureId;
            }
        }
        return feature;
    },

    /**
     * APIMethod: getFeatureBy
     * Given a property value, return the feature if it exists in the features array
     *
     * Parameters:
     * property - {String}
     * value - {String}
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A feature corresponding to the given
     * property value or null if there is no such feature.
     */
    getFeatureBy: function(property, value) {
        //TBD - would it be more efficient to use a hash for this.features?
        var feature = null;
        for(var i=0, len=this.features.length; i<len; ++i) {
            if(this.features[i][property] == value) {
                feature = this.features[i];
                break;
            }
        }
        return feature;
    },

    /**
     * APIMethod: getFeatureById
     * Given a feature id, return the feature if it exists in the features array
     *
     * Parameters:
     * featureId - {String}
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A feature corresponding to the given
     * featureId or null if there is no such feature.
     */
    getFeatureById: function(featureId) {
        return this.getFeatureBy('id', featureId);
    },

    /**
     * APIMethod: getFeatureByFid
     * Given a feature fid, return the feature if it exists in the features array
     *
     * Parameters:
     * featureFid - {String}
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A feature corresponding to the given
     * featureFid or null if there is no such feature.
     */
    getFeatureByFid: function(featureFid) {
        return this.getFeatureBy('fid', featureFid);
    },
    
    /**
     * APIMethod: getFeaturesByAttribute
     * Returns an array of features that have the given attribute key set to the
     * given value. Comparison of attribute values takes care of datatypes, e.g.
     * the string '1234' is not equal to the number 1234.
     *
     * Parameters:
     * attrName - {String}
     * attrValue - {Mixed}
     *
     * Returns:
     * Array({<OpenLayers.Feature.Vector>}) An array of features that have the 
     * passed named attribute set to the given value.
     */
    getFeaturesByAttribute: function(attrName, attrValue) {
        var i,
            feature,    
            len = this.features.length,
            foundFeatures = [];
        for(i = 0; i < len; i++) {            
            feature = this.features[i];
            if(feature && feature.attributes) {
                if (feature.attributes[attrName] === attrValue) {
                    foundFeatures.push(feature);
                }
            }
        }
        return foundFeatures;
    },

    /**
     * Unselect the selected features
     * i.e. clears the featureSelection array
     * change the style back
    clearSelection: function() {

       var vectorLayer = this.map.vectorLayer;
        for (var i = 0; i < this.map.featureSelection.length; i++) {
            var featureSelection = this.map.featureSelection[i];
            vectorLayer.drawFeature(featureSelection, vectorLayer.style);
        }
        this.map.featureSelection = [];
    },
     */


    /**
     * APIMethod: onFeatureInsert
     * method called after a feature is inserted.
     * Does nothing by default. Override this if you
     * need to do something on feature updates.
     *
     * Parameters: 
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    onFeatureInsert: function(feature) {
    },
    
    /**
     * APIMethod: preFeatureInsert
     * method called before a feature is inserted.
     * Does nothing by default. Override this if you
     * need to do something when features are first added to the
     * layer, but before they are drawn, such as adjust the style.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    preFeatureInsert: function(feature) {
    },

    /** 
     * APIMethod: getDataExtent
     * Calculates the max extent which includes all of the features.
     * 
     * Returns:
     * {<OpenLayers.Bounds>} or null if the layer has no features with
     * geometries.
     */
    getDataExtent: function () {
        var maxExtent = null;
        var features = this.features;
        if(features && (features.length > 0)) {
            var geometry = null;
            for(var i=0, len=features.length; i<len; i++) {
                geometry = features[i].geometry;
                if (geometry) {
                    if (maxExtent === null) {
                        maxExtent = new OpenLayers.Bounds();
                    }
                    maxExtent.extend(geometry.getBounds());
                }
            }
        }
        return maxExtent;
    },

    CLASS_NAME: "OpenLayers.Layer.Vector"
});
/* ======================================================================
    OpenLayers/Layer/Vector/RootContainer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Vector.js
 */

/**
 * Class: OpenLayers.Layer.Vector.RootContainer
 * A special layer type to combine multiple vector layers inside a single
 *     renderer root container. This class is not supposed to be instantiated
 *     from user space, it is a helper class for controls that require event
 *     processing for multiple vector layers.
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Vector>
 */
OpenLayers.Layer.Vector.RootContainer = OpenLayers.Class(OpenLayers.Layer.Vector, {
    
    /**
     * Property: displayInLayerSwitcher
     * Set to false for this layer type
     */
    displayInLayerSwitcher: false,
    
    /**
     * APIProperty: layers
     * Layers that are attached to this container. Required config option.
     */
    layers: null,
    
    /**
     * Constructor: OpenLayers.Layer.Vector.RootContainer
     * Create a new root container for multiple vector layer. This constructor
     * is not supposed to be used from user space, it is only to be used by
     * controls that need feature selection across multiple vector layers.
     *
     * Parameters:
     * name - {String} A name for the layer
     * options - {Object} Optional object with non-default properties to set on
     *           the layer.
     * 
     * Required options properties:
     * layers - {Array(<OpenLayers.Layer.Vector>)} The layers managed by this
     *     container
     *
     * Returns:
     * {<OpenLayers.Layer.Vector.RootContainer>} A new vector layer root
     *     container
     */
    
    /**
     * Method: display
     */
    display: function() {},
    
    /**
     * Method: getFeatureFromEvent
     * walk through the layers to find the feature returned by the event
     * 
     * Parameters:
     * evt - {Object} event object with a feature property
     * 
     * Returns:
     * {<OpenLayers.Feature.Vector>}
     */
    getFeatureFromEvent: function(evt) {
        var layers = this.layers;
        var feature;
        for(var i=0; i<layers.length; i++) {
            feature = layers[i].getFeatureFromEvent(evt);
            if(feature) {
                return feature;
            }
        }
    },
    
    /**
     * Method: setMap
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        OpenLayers.Layer.Vector.prototype.setMap.apply(this, arguments);
        this.collectRoots();
        map.events.register("changelayer", this, this.handleChangeLayer);
    },
    
    /**
     * Method: removeMap
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        map.events.unregister("changelayer", this, this.handleChangeLayer);
        this.resetRoots();
        OpenLayers.Layer.Vector.prototype.removeMap.apply(this, arguments);
    },
    
    /**
     * Method: collectRoots
     * Collects the root nodes of all layers this control is configured with
     * and moveswien the nodes to this control's layer
     */
    collectRoots: function() {
        var layer;
        // walk through all map layers, because we want to keep the order
        for(var i=0; i<this.map.layers.length; ++i) {
            layer = this.map.layers[i];
            if(OpenLayers.Util.indexOf(this.layers, layer) != -1) {
                layer.renderer.moveRoot(this.renderer);
            }
        }
    },
    
    /**
     * Method: resetRoots
     * Resets the root nodes back into the layers they belong to.
     */
    resetRoots: function() {
        var layer;
        for(var i=0; i<this.layers.length; ++i) {
            layer = this.layers[i];
            if(this.renderer && layer.renderer.getRenderLayerId() == this.id) {
                this.renderer.moveRoot(layer.renderer);
            }
        }
    },
    
    /**
     * Method: handleChangeLayer
     * Event handler for the map's changelayer event. We need to rebuild
     * this container's layer dom if order of one of its layers changes.
     * This handler is added with the setMap method, and removed with the
     * removeMap method.
     * 
     * Parameters:
     * evt - {Object}
     */
    handleChangeLayer: function(evt) {
        var layer = evt.layer;
        if(evt.property == "order" &&
                        OpenLayers.Util.indexOf(this.layers, layer) != -1) {
            this.resetRoots();
            this.collectRoots();
        }
    },

    CLASS_NAME: "OpenLayers.Layer.Vector.RootContainer"
});
/* ======================================================================
    OpenLayers/Control/SelectFeature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Handler/Feature.js
 * @requires OpenLayers/Layer/Vector/RootContainer.js
 */

/**
 * Class: OpenLayers.Control.SelectFeature
 * The SelectFeature control selects vector features from a given layer on 
 * click or hover. 
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.SelectFeature = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforefeaturehighlighted - Triggered before a feature is highlighted
     * featurehighlighted - Triggered when a feature is highlighted
     * featureunhighlighted - Triggered when a feature is unhighlighted
     * boxselectionstart - Triggered before box selection starts
     * boxselectionend - Triggered after box selection ends
     */
    
    /**
     * Property: multipleKey
     * {String} An event modifier ('altKey' or 'shiftKey') that temporarily sets
     *     the <multiple> property to true.  Default is null.
     */
    multipleKey: null,
    
    /**
     * Property: toggleKey
     * {String} An event modifier ('altKey' or 'shiftKey') that temporarily sets
     *     the <toggle> property to true.  Default is null.
     */
    toggleKey: null,
    
    /**
     * APIProperty: multiple
     * {Boolean} Allow selection of multiple geometries.  Default is false.
     */
    multiple: false, 

    /**
     * APIProperty: clickout
     * {Boolean} Unselect features when clicking outside any feature.
     *     Default is true.
     */
    clickout: true,

    /**
     * APIProperty: toggle
     * {Boolean} Unselect a selected feature on click.  Default is false.  Only
     *     has meaning if hover is false.
     */
    toggle: false,

    /**
     * APIProperty: hover
     * {Boolean} Select on mouse over and deselect on mouse out.  If true, this
     * ignores clicks and only listens to mouse moves.
     */
    hover: false,

    /**
     * APIProperty: highlightOnly
     * {Boolean} If true do not actually select features (that is place them in 
     * the layer's selected features array), just highlight them. This property
     * has no effect if hover is false. Defaults to false.
     */
    highlightOnly: false,
    
    /**
     * APIProperty: box
     * {Boolean} Allow feature selection by drawing a box.
     */
    box: false,
    
    /**
     * Property: onBeforeSelect 
     * {Function} Optional function to be called before a feature is selected.
     *     The function should expect to be called with a feature.
     */
    onBeforeSelect: function() {},
    
    /**
     * APIProperty: onSelect 
     * {Function} Optional function to be called when a feature is selected.
     *     The function should expect to be called with a feature.
     */
    onSelect: function() {},

    /**
     * APIProperty: onUnselect
     * {Function} Optional function to be called when a feature is unselected.
     *     The function should expect to be called with a feature.
     */
    onUnselect: function() {},
    
    /**
     * Property: scope
     * {Object} The scope to use with the onBeforeSelect, onSelect, onUnselect
     *     callbacks. If null the scope will be this control.
     */
    scope: null,

    /**
     * APIProperty: geometryTypes
     * {Array(String)} To restrict selecting to a limited set of geometry types,
     *     send a list of strings corresponding to the geometry class names.
     */
    geometryTypes: null,

    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>} The vector layer with a common renderer
     * root for all layers this control is configured with (if an array of
     * layers was passed to the constructor), or the vector layer the control
     * was configured with (if a single layer was passed to the constructor).
     */
    layer: null,
    
    /**
     * Property: layers
     * {Array(<OpenLayers.Layer.Vector>)} The layers this control will work on,
     * or null if the control was configured with a single layer
     */
    layers: null,
    
    /**
     * APIProperty: callbacks
     * {Object} The functions that are sent to the handlers.feature for callback
     */
    callbacks: null,
    
    /**
     * APIProperty: selectStyle 
     * {Object} Hash of styles
     */
    selectStyle: null,
    
    /**
     * Property: renderIntent
     * {String} key used to retrieve the select style from the layer's
     * style map.
     */
    renderIntent: "select",

    /**
     * Property: handlers
     * {Object} Object with references to multiple <OpenLayers.Handler>
     *     instances.
     */
    handlers: null,

    /**
     * Constructor: OpenLayers.Control.SelectFeature
     * Create a new control for selecting features.
     *
     * Parameters:
     * layers - {<OpenLayers.Layer.Vector>}, or an array of vector layers. The
     *     layer(s) this control will select features from.
     * options - {Object} 
     */
    initialize: function(layers, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        
        if(this.scope === null) {
            this.scope = this;
        }
        this.initLayer(layers);
        var callbacks = {
            click: this.clickFeature,
            clickout: this.clickoutFeature
        };
        if (this.hover) {
            callbacks.over = this.overFeature;
            callbacks.out = this.outFeature;
        }
             
        this.callbacks = OpenLayers.Util.extend(callbacks, this.callbacks);
        this.handlers = {
            feature: new OpenLayers.Handler.Feature(
                this, this.layer, this.callbacks,
                {geometryTypes: this.geometryTypes}
            )
        };

        if (this.box) {
            this.handlers.box = new OpenLayers.Handler.Box(
                this, {done: this.selectBox},
                {boxDivClassName: "olHandlerBoxSelectFeature"}
            ); 
        }
    },

    /**
     * Method: initLayer
     * Assign the layer property. If layers is an array, we need to use
     *     a RootContainer.
     *
     * Parameters:
     * layers - {<OpenLayers.Layer.Vector>}, or an array of vector layers.
     */
    initLayer: function(layers) {
        if(OpenLayers.Util.isArray(layers)) {
            this.layers = layers;
            this.layer = new OpenLayers.Layer.Vector.RootContainer(
                this.id + "_container", {
                    layers: layers
                }
            );
        } else {
            this.layer = layers;
        }
    },
    
    /**
     * Method: destroy
     */
    destroy: function() {
        if(this.active && this.layers) {
            this.map.removeLayer(this.layer);
        }
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
        if(this.layers) {
            this.layer.destroy();
        }
    },

    /**
     * Method: activate
     * Activates the control.
     * 
     * Returns:
     * {Boolean} The control was effectively activated.
     */
    activate: function () {
        if (!this.active) {
            if(this.layers) {
                this.map.addLayer(this.layer);
            }
            this.handlers.feature.activate();
            if(this.box && this.handlers.box) {
                this.handlers.box.activate();
            }
        }
        return OpenLayers.Control.prototype.activate.apply(
            this, arguments
        );
    },

    /**
     * Method: deactivate
     * Deactivates the control.
     * 
     * Returns:
     * {Boolean} The control was effectively deactivated.
     */
    deactivate: function () {
        if (this.active) {
            this.handlers.feature.deactivate();
            if(this.handlers.box) {
                this.handlers.box.deactivate();
            }
            if(this.layers) {
                this.map.removeLayer(this.layer);
            }
        }
        return OpenLayers.Control.prototype.deactivate.apply(
            this, arguments
        );
    },

    /**
     * Method: unselectAll
     * Unselect all selected features.  To unselect all except for a single
     *     feature, set the options.except property to the feature.
     *
     * Parameters:
     * options - {Object} Optional configuration object.
     */
    unselectAll: function(options) {
        // we'll want an option to supress notification here
        var layers = this.layers || [this.layer];
        var layer, feature;
        for(var l=0; l<layers.length; ++l) {
            layer = layers[l];
            for(var i=layer.selectedFeatures.length-1; i>=0; --i) {
                feature = layer.selectedFeatures[i];
                if(!options || options.except != feature) {
                    this.unselect(feature);
                }
            }
        }
    },

    /**
     * Method: clickFeature
     * Called on click in a feature
     * Only responds if this.hover is false.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    clickFeature: function(feature) {
        if(!this.hover) {
            var selected = (OpenLayers.Util.indexOf(
                feature.layer.selectedFeatures, feature) > -1);
            if(selected) {
                if(this.toggleSelect()) {
                    this.unselect(feature);
                } else if(!this.multipleSelect()) {
                    this.unselectAll({except: feature});
                }
            } else {
                if(!this.multipleSelect()) {
                    this.unselectAll({except: feature});
                }
                this.select(feature);
            }
        }
    },

    /**
     * Method: multipleSelect
     * Allow for multiple selected features based on <multiple> property and
     *     <multipleKey> event modifier.
     *
     * Returns:
     * {Boolean} Allow for multiple selected features.
     */
    multipleSelect: function() {
        return this.multiple || (this.handlers.feature.evt &&
                                 this.handlers.feature.evt[this.multipleKey]);
    },
    
    /**
     * Method: toggleSelect
     * Event should toggle the selected state of a feature based on <toggle>
     *     property and <toggleKey> event modifier.
     *
     * Returns:
     * {Boolean} Toggle the selected state of a feature.
     */
    toggleSelect: function() {
        return this.toggle || (this.handlers.feature.evt &&
                               this.handlers.feature.evt[this.toggleKey]);
    },

    /**
     * Method: clickoutFeature
     * Called on click outside a previously clicked (selected) feature.
     * Only responds if this.hover is false.
     *
     * Parameters:
     * feature - {<OpenLayers.Vector.Feature>} 
     */
    clickoutFeature: function(feature) {
        if(!this.hover && this.clickout) {
            this.unselectAll();
        }
    },

    /**
     * Method: overFeature
     * Called on over a feature.
     * Only responds if this.hover is true.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    overFeature: function(feature) {
        var layer = feature.layer;
        if(this.hover) {
            if(this.highlightOnly) {
                this.highlight(feature);
            } else if(OpenLayers.Util.indexOf(
                layer.selectedFeatures, feature) == -1) {
                this.select(feature);
            }
        }
    },

    /**
     * Method: outFeature
     * Called on out of a selected feature.
     * Only responds if this.hover is true.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    outFeature: function(feature) {
        if(this.hover) {
            if(this.highlightOnly) {
                // we do nothing if we're not the last highlighter of the
                // feature
                if(feature._lastHighlighter == this.id) {
                    // if another select control had highlighted the feature before
                    // we did it ourself then we use that control to highlight the
                    // feature as it was before we highlighted it, else we just
                    // unhighlight it
                    if(feature._prevHighlighter &&
                       feature._prevHighlighter != this.id) {
                        delete feature._lastHighlighter;
                        var control = this.map.getControl(
                            feature._prevHighlighter);
                        if(control) {
                            control.highlight(feature);
                        }
                    } else {
                        this.unhighlight(feature);
                    }
                }
            } else {
                this.unselect(feature);
            }
        }
    },

    /**
     * Method: highlight
     * Redraw feature with the select style.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    highlight: function(feature) {
        var layer = feature.layer;
        var cont = this.events.triggerEvent("beforefeaturehighlighted", {
            feature : feature
        });
        if(cont !== false) {
            feature._prevHighlighter = feature._lastHighlighter;
            feature._lastHighlighter = this.id;
            var style = this.selectStyle || this.renderIntent;
            layer.drawFeature(feature, style);
            this.events.triggerEvent("featurehighlighted", {feature : feature});
        }
    },

    /**
     * Method: unhighlight
     * Redraw feature with the "default" style
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    unhighlight: function(feature) {
        var layer = feature.layer;
        // three cases:
        // 1. there's no other highlighter, in that case _prev is undefined,
        //    and we just need to undef _last
        // 2. another control highlighted the feature after we did it, in
        //    that case _last references this other control, and we just
        //    need to undef _prev
        // 3. another control highlighted the feature before we did it, in
        //    that case _prev references this other control, and we need to
        //    set _last to _prev and undef _prev
        if(feature._prevHighlighter == undefined) {
            delete feature._lastHighlighter;
        } else if(feature._prevHighlighter == this.id) {
            delete feature._prevHighlighter;
        } else {
            feature._lastHighlighter = feature._prevHighlighter;
            delete feature._prevHighlighter;
        }
        layer.drawFeature(feature, feature.style || feature.layer.style ||
            "default");
        this.events.triggerEvent("featureunhighlighted", {feature : feature});
    },
    
    /**
     * Method: select
     * Add feature to the layer's selectedFeature array, render the feature as
     * selected, and call the onSelect function.
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    select: function(feature) {
        var cont = this.onBeforeSelect.call(this.scope, feature);
        var layer = feature.layer;
        if(cont !== false) {
            cont = layer.events.triggerEvent("beforefeatureselected", {
                feature: feature
            });
            if(cont !== false) {
                layer.selectedFeatures.push(feature);
                this.highlight(feature);
                // if the feature handler isn't involved in the feature
                // selection (because the box handler is used or the
                // feature is selected programatically) we fake the
                // feature handler to allow unselecting on click
                if(!this.handlers.feature.lastFeature) {
                    this.handlers.feature.lastFeature = layer.selectedFeatures[0];
                }
                layer.events.triggerEvent("featureselected", {feature: feature});
                this.onSelect.call(this.scope, feature);
            }
        }
    },

    /**
     * Method: unselect
     * Remove feature from the layer's selectedFeature array, render the feature as
     * normal, and call the onUnselect function.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     */
    unselect: function(feature) {
        var layer = feature.layer;
        // Store feature style for restoration later
        this.unhighlight(feature);
        OpenLayers.Util.removeItem(layer.selectedFeatures, feature);
        layer.events.triggerEvent("featureunselected", {feature: feature});
        this.onUnselect.call(this.scope, feature);
    },
    
    /**
     * Method: selectBox
     * Callback from the handlers.box set up when <box> selection is true
     *     on.
     *
     * Parameters:
     * position - {<OpenLayers.Bounds> || <OpenLayers.Pixel> }  
     */
    selectBox: function(position) {
        if (position instanceof OpenLayers.Bounds) {
            var minXY = this.map.getLonLatFromPixel({
                x: position.left,
                y: position.bottom
            });
            var maxXY = this.map.getLonLatFromPixel({
                x: position.right,
                y: position.top
            });
            var bounds = new OpenLayers.Bounds(
                minXY.lon, minXY.lat, maxXY.lon, maxXY.lat
            );
            
            // if multiple is false, first deselect currently selected features
            if (!this.multipleSelect()) {
                this.unselectAll();
            }
            
            // because we're using a box, we consider we want multiple selection
            var prevMultiple = this.multiple;
            this.multiple = true;
            var layers = this.layers || [this.layer];
            this.events.triggerEvent("boxselectionstart", {layers: layers}); 
            var layer;
            for(var l=0; l<layers.length; ++l) {
                layer = layers[l];
                for(var i=0, len = layer.features.length; i<len; ++i) {
                    var feature = layer.features[i];
                    // check if the feature is displayed
                    if (!feature.getVisibility()) {
                        continue;
                    }

                    if (this.geometryTypes == null || OpenLayers.Util.indexOf(
                            this.geometryTypes, feature.geometry.CLASS_NAME) > -1) {
                        if (bounds.toGeometry().intersects(feature.geometry)) {
                            if (OpenLayers.Util.indexOf(layer.selectedFeatures, feature) == -1) {
                                this.select(feature);
                            }
                        }
                    }
                }
            }
            this.multiple = prevMultiple;
            this.events.triggerEvent("boxselectionend", {layers: layers}); 
        }
    },

    /** 
     * Method: setMap
     * Set the map property for the control. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        this.handlers.feature.setMap(map);
        if (this.box) {
            this.handlers.box.setMap(map);
        }
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
    },
    
    /**
     * APIMethod: setLayer
     * Attach a new layer to the control, overriding any existing layers.
     *
     * Parameters:
     * layers - Array of {<OpenLayers.Layer.Vector>} or a single
     *     {<OpenLayers.Layer.Vector>}
     */
    setLayer: function(layers) {
        var isActive = this.active;
        this.unselectAll();
        this.deactivate();
        if(this.layers) {
            this.layer.destroy();
            this.layers = null;
        }
        this.initLayer(layers);
        this.handlers.feature.layer = this.layer;
        if (isActive) {
            this.activate();
        }
    },
    
    CLASS_NAME: "OpenLayers.Control.SelectFeature"
});
/* ======================================================================
    OpenLayers/Handler/Keyboard.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 * @requires OpenLayers/Events.js
 */

/**
 * Class: OpenLayers.handler.Keyboard
 * A handler for keyboard events.  Create a new instance with the
 *     <OpenLayers.Handler.Keyboard> constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Handler> 
 */
OpenLayers.Handler.Keyboard = OpenLayers.Class(OpenLayers.Handler, {

    /* http://www.quirksmode.org/js/keys.html explains key x-browser
        key handling quirks in pretty nice detail */

    /** 
     * Constant: KEY_EVENTS
     * keydown, keypress, keyup
     */
    KEY_EVENTS: ["keydown", "keyup"],

    /** 
    * Property: eventListener
    * {Function}
    */
    eventListener: null,

    /**
     * Property: observeElement
     * {DOMElement|String} The DOM element on which we listen for
     *     key events. Default to the document.
     */
    observeElement: null,

    /**
     * Constructor: OpenLayers.Handler.Keyboard
     * Returns a new keyboard handler.
     * 
     * Parameters:
     * control - {<OpenLayers.Control>} The control that is making use of
     *     this handler.  If a handler is being used without a control, the
     *     handlers setMap method must be overridden to deal properly with
     *     the map.
     * callbacks - {Object} An object containing a single function to be
     *     called when the drag operation is finished. The callback should
     *     expect to recieve a single argument, the pixel location of the event.
     *     Callbacks for 'keydown', 'keypress', and 'keyup' are supported.
     * options - {Object} Optional object whose properties will be set on the
     *     handler.
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Handler.prototype.initialize.apply(this, arguments);
        // cache the bound event listener method so it can be unobserved later
        this.eventListener = OpenLayers.Function.bindAsEventListener(
            this.handleKeyEvent, this
        );
    },
    
    /**
     * Method: destroy
     */
    destroy: function() {
        this.deactivate();
        this.eventListener = null;
        OpenLayers.Handler.prototype.destroy.apply(this, arguments);
    },

    /**
     * Method: activate
     */
    activate: function() {
        if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            this.observeElement = this.observeElement || document;
            for (var i=0, len=this.KEY_EVENTS.length; i<len; i++) {
                OpenLayers.Event.observe(
                    this.observeElement, this.KEY_EVENTS[i], this.eventListener);
            }
            return true;
        } else {
            return false;
        }
    },

    /**
     * Method: deactivate
     */
    deactivate: function() {
        var deactivated = false;
        if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            for (var i=0, len=this.KEY_EVENTS.length; i<len; i++) {
                OpenLayers.Event.stopObserving(
                    this.observeElement, this.KEY_EVENTS[i], this.eventListener);
            }
            deactivated = true;
        }
        return deactivated;
    },

    /**
     * Method: handleKeyEvent 
     */
    handleKeyEvent: function (evt) {
        if (this.checkModifiers(evt)) {
            this.callback(evt.type, [evt]);
        }
    },

    CLASS_NAME: "OpenLayers.Handler.Keyboard"
});
/* ======================================================================
    OpenLayers/Control/ModifyFeature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/DragFeature.js
 * @requires OpenLayers/Control/SelectFeature.js
 * @requires OpenLayers/Handler/Keyboard.js
 */

/**
 * Class: OpenLayers.Control.ModifyFeature
 * Control to modify features.  When activated, a click renders the vertices
 *     of a feature - these vertices can then be dragged.  By default, the
 *     delete key will delete the vertex under the mouse.  New features are
 *     added by dragging "virtual vertices" between vertices.  Create a new
 *     control with the <OpenLayers.Control.ModifyFeature> constructor.
 *
 * Inherits From:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.ModifyFeature = OpenLayers.Class(OpenLayers.Control, {

    /**
     * APIProperty: geometryTypes
     * {Array(String)} To restrict modification to a limited set of geometry
     *     types, send a list of strings corresponding to the geometry class
     *     names.
     */
    geometryTypes: null,

    /**
     * APIProperty: clickout
     * {Boolean} Unselect features when clicking outside any feature.
     *     Default is true.
     */
    clickout: true,

    /**
     * APIProperty: toggle
     * {Boolean} Unselect a selected feature on click.
     *      Default is true.
     */
    toggle: true,
    
    /**
     * APIProperty: standalone
     * {Boolean} Set to true to create a control without SelectFeature
     *     capabilities. Default is false.  If standalone is true, to modify
     *     a feature, call the <selectFeature> method with the target feature.
     *     Note that you must call the <unselectFeature> method to finish
     *     feature modification in standalone mode (before starting to modify
     *     another feature).
     */
    standalone: false,

    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>}
     */
    layer: null,
    
    /**
     * Property: feature
     * {<OpenLayers.Feature.Vector>} Feature currently available for modification.
     */
    feature: null,
    
    /**
     * Property: vertices
     * {Array(<OpenLayers.Feature.Vector>)} Verticies currently available
     *     for dragging.
     */
    vertices: null,
    
    /**
     * Property: virtualVertices
     * {Array(<OpenLayers.Feature.Vector>)} Virtual vertices in the middle
     *     of each edge.
     */
    virtualVertices: null,

    /**
     * Property: selectControl
     * {<OpenLayers.Control.SelectFeature>}
     */
    selectControl: null,
    
    /**
     * Property: dragControl
     * {<OpenLayers.Control.DragFeature>}
     */
    dragControl: null,
    
    /**
     * Property: handlers
     * {Object}
     */
    handlers: null,
    
    /**
     * APIProperty: deleteCodes
     * {Array(Integer)} Keycodes for deleting verticies.  Set to null to disable
     *     vertex deltion by keypress.  If non-null, keypresses with codes
     *     in this array will delete vertices under the mouse. Default
     *     is 46 and 68, the 'delete' and lowercase 'd' keys.
     */
    deleteCodes: null,

    /**
     * APIProperty: virtualStyle
     * {Object} A symbolizer to be used for virtual vertices.
     */
    virtualStyle: null,
    
    /**
     * APIProperty: vertexRenderIntent
     * {String} The renderIntent to use for vertices. If no <virtualStyle> is
     * provided, this renderIntent will also be used for virtual vertices, with
     * a fillOpacity and strokeOpacity of 0.3. Default is null, which means
     * that the layer's default style will be used for vertices.
     */
    vertexRenderIntent: null,

    /**
     * APIProperty: mode
     * {Integer} Bitfields specifying the modification mode. Defaults to
     *      OpenLayers.Control.ModifyFeature.RESHAPE. To set the mode to a
     *      combination of options, use the | operator. For example, to allow
     *      the control to both resize and rotate features, use the following
     *      syntax
     * (code)
     * control.mode = OpenLayers.Control.ModifyFeature.RESIZE |
     *                OpenLayers.Control.ModifyFeature.ROTATE;
     *  (end)
     */
    mode: null,

    /**
     * APIProperty: createVertices
     * {Boolean} Create new vertices by dragging the virtual vertices
     *     in the middle of each edge. Default is true.
     */
    createVertices: true,

    /**
     * Property: modified
     * {Boolean} The currently selected feature has been modified.
     */
    modified: false,

    /**
     * Property: radiusHandle
     * {<OpenLayers.Feature.Vector>} A handle for rotating/resizing a feature.
     */
    radiusHandle: null,

    /**
     * Property: dragHandle
     * {<OpenLayers.Feature.Vector>} A handle for dragging a feature.
     */
    dragHandle: null,

    /**
     * APIProperty: onModificationStart 
     * {Function} *Deprecated*.  Register for "beforefeaturemodified" instead.
     *     The "beforefeaturemodified" event is triggered on the layer before
     *     any modification begins.
     *
     * Optional function to be called when a feature is selected
     *     to be modified. The function should expect to be called with a
     *     feature.  This could be used for example to allow to lock the
     *     feature on server-side.
     */
    onModificationStart: function() {},

    /**
     * APIProperty: onModification
     * {Function} *Deprecated*.  Register for "featuremodified" instead.
     *     The "featuremodified" event is triggered on the layer with each
     *     feature modification.
     *
     * Optional function to be called when a feature has been
     *     modified.  The function should expect to be called with a feature.
     */
    onModification: function() {},

    /**
     * APIProperty: onModificationEnd
     * {Function} *Deprecated*.  Register for "afterfeaturemodified" instead.
     *     The "afterfeaturemodified" event is triggered on the layer after
     *     a feature has been modified.
     *
     * Optional function to be called when a feature is finished 
     *     being modified.  The function should expect to be called with a
     *     feature.
     */
    onModificationEnd: function() {},

    /**
     * Constructor: OpenLayers.Control.ModifyFeature
     * Create a new modify feature control.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} Layer that contains features that
     *     will be modified.
     * options - {Object} Optional object whose properties will be set on the
     *     control.
     */
    initialize: function(layer, options) {
        options = options || {};
        this.layer = layer;
        this.vertices = [];
        this.virtualVertices = [];
        this.virtualStyle = OpenLayers.Util.extend({},
            this.layer.style ||
            this.layer.styleMap.createSymbolizer(null, options.vertexRenderIntent)
        );
        this.virtualStyle.fillOpacity = 0.3;
        this.virtualStyle.strokeOpacity = 0.3;
        this.deleteCodes = [46, 68];
        this.mode = OpenLayers.Control.ModifyFeature.RESHAPE;
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        if(!(OpenLayers.Util.isArray(this.deleteCodes))) {
            this.deleteCodes = [this.deleteCodes];
        }
        var control = this;

        // configure the select control
        var selectOptions = {
            geometryTypes: this.geometryTypes,
            clickout: this.clickout,
            toggle: this.toggle,
            onBeforeSelect: this.beforeSelectFeature,
            onSelect: this.selectFeature,
            onUnselect: this.unselectFeature,
            scope: this
        };
        if(this.standalone === false) {
            this.selectControl = new OpenLayers.Control.SelectFeature(
                layer, selectOptions
            );
        }

        // configure the drag control
        var dragOptions = {
            geometryTypes: ["OpenLayers.Geometry.Point"],
            onStart: function(feature, pixel) {
                control.dragStart.apply(control, [feature, pixel]);
            },
            onDrag: function(feature, pixel) {
                control.dragVertex.apply(control, [feature, pixel]);
            },
            onComplete: function(feature) {
                control.dragComplete.apply(control, [feature]);
            },
            featureCallbacks: {
                over: function(feature) {
                    /**
                     * In normal mode, the feature handler is set up to allow
                     * dragging of all points.  In standalone mode, we only
                     * want to allow dragging of sketch vertices and virtual
                     * vertices - or, in the case of a modifiable point, the
                     * point itself.
                     */
                    if(control.standalone !== true || feature._sketch ||
                       control.feature === feature) {
                        control.dragControl.overFeature.apply(
                            control.dragControl, [feature]);
                    }
                }
            }
        };
        this.dragControl = new OpenLayers.Control.DragFeature(
            layer, dragOptions
        );

        // configure the keyboard handler
        var keyboardOptions = {
            keydown: this.handleKeypress
        };
        this.handlers = {
            keyboard: new OpenLayers.Handler.Keyboard(this, keyboardOptions)
        };
    },

    /**
     * APIMethod: destroy
     * Take care of things that are not handled in superclass.
     */
    destroy: function() {
        this.layer = null;
        this.standalone || this.selectControl.destroy();
        this.dragControl.destroy();
        OpenLayers.Control.prototype.destroy.apply(this, []);
    },

    /**
     * APIMethod: activate
     * Activate the control.
     * 
     * Returns:
     * {Boolean} Successfully activated the control.
     */
    activate: function() {
        return ((this.standalone || this.selectControl.activate()) &&
                this.handlers.keyboard.activate() &&
                OpenLayers.Control.prototype.activate.apply(this, arguments));
    },

    /**
     * APIMethod: deactivate
     * Deactivate the control.
     *
     * Returns: 
     * {Boolean} Successfully deactivated the control.
     */
    deactivate: function() {
        var deactivated = false;
        // the return from the controls is unimportant in this case
        if(OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
            this.layer.removeFeatures(this.vertices, {silent: true});
            this.layer.removeFeatures(this.virtualVertices, {silent: true});
            this.vertices = [];
            this.dragControl.deactivate();
            var feature = this.feature;
            var valid = feature && feature.geometry && feature.layer;
            if(this.standalone === false) {
                if(valid) {
                    this.selectControl.unselect.apply(this.selectControl,
                                                      [feature]);
                }
                this.selectControl.deactivate();
            } else {
                if(valid) {
                    this.unselectFeature(feature);
                }
            }
            this.handlers.keyboard.deactivate();
            deactivated = true;
        }
        return deactivated;
    },
    
    /**
     * Method: beforeSelectFeature
     * Called before a feature is selected.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature about to be selected.
     */
    beforeSelectFeature: function(feature) {
        return this.layer.events.triggerEvent(
            "beforefeaturemodified", {feature: feature}
        );
    },

    /**
     * APIMethod: selectFeature
     * Select a feature for modification in standalone mode. In non-standalone
     * mode, this method is called when the select feature control selects a
     * feature. Register a listener to the beforefeaturemodified event and
     * return false to prevent feature modification.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} the selected feature.
     */
    selectFeature: function(feature) {
        if (!this.standalone || this.beforeSelectFeature(feature) !== false) {
            this.feature = feature;
            this.modified = false;
            this.resetVertices();
            this.dragControl.activate();
            this.onModificationStart(this.feature);
        }
        // keep track of geometry modifications
        var modified = feature.modified;
        if (feature.geometry && !(modified && modified.geometry)) {
            this._originalGeometry = feature.geometry.clone();
        }
    },

    /**
     * APIMethod: unselectFeature
     * Called when the select feature control unselects a feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The unselected feature.
     */
    unselectFeature: function(feature) {
        this.layer.removeFeatures(this.vertices, {silent: true});
        this.vertices = [];
        this.layer.destroyFeatures(this.virtualVertices, {silent: true});
        this.virtualVertices = [];
        if(this.dragHandle) {
            this.layer.destroyFeatures([this.dragHandle], {silent: true});
            delete this.dragHandle;
        }
        if(this.radiusHandle) {
            this.layer.destroyFeatures([this.radiusHandle], {silent: true});
            delete this.radiusHandle;
        }
        this.feature = null;
        this.dragControl.deactivate();
        this.onModificationEnd(feature);
        this.layer.events.triggerEvent("afterfeaturemodified", {
            feature: feature,
            modified: this.modified
        });
        this.modified = false;
    },

    /**
     * Method: dragStart
     * Called by the drag feature control with before a feature is dragged.
     *     This method is used to differentiate between points and vertices
     *     of higher order geometries.  This respects the <geometryTypes>
     *     property and forces a select of points when the drag control is
     *     already active (and stops events from propagating to the select
     *     control).
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The point or vertex about to be
     *     dragged.
     * pixel - {<OpenLayers.Pixel>} Pixel location of the mouse event.
     */
    dragStart: function(feature, pixel) {
        // only change behavior if the feature is not in the vertices array
        if(feature != this.feature && !feature.geometry.parent &&
           feature != this.dragHandle && feature != this.radiusHandle) {
            if(this.standalone === false && this.feature) {
                // unselect the currently selected feature
                this.selectControl.clickFeature.apply(this.selectControl,
                                                      [this.feature]);
            }
            // check any constraints on the geometry type
            if(this.geometryTypes == null ||
               OpenLayers.Util.indexOf(this.geometryTypes,
                                       feature.geometry.CLASS_NAME) != -1) {
                // select the point
                this.standalone || this.selectControl.clickFeature.apply(
                                            this.selectControl, [feature]);
                /**
                 * TBD: These lines improve workflow by letting the user
                 *     immediately start dragging after the mouse down.
                 *     However, it is very ugly to be messing with controls
                 *     and their handlers in this way.  I'd like a better
                 *     solution if the workflow change is necessary.
                 */
                // prepare the point for dragging
                this.dragControl.overFeature.apply(this.dragControl,
                                                   [feature]);
                this.dragControl.lastPixel = pixel;
                this.dragControl.handlers.drag.started = true;
                this.dragControl.handlers.drag.start = pixel;
                this.dragControl.handlers.drag.last = pixel;
            }
        }
    },
    
    /**
     * Method: dragVertex
     * Called by the drag feature control with each drag move of a vertex.
     *
     * Parameters:
     * vertex - {<OpenLayers.Feature.Vector>} The vertex being dragged.
     * pixel - {<OpenLayers.Pixel>} Pixel location of the mouse event.
     */
    dragVertex: function(vertex, pixel) {
        this.modified = true;
        /**
         * Five cases:
         * 1) dragging a simple point
         * 2) dragging a virtual vertex
         * 3) dragging a drag handle
         * 4) dragging a real vertex
         * 5) dragging a radius handle
         */
        if(this.feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
            // dragging a simple point
            if(this.feature != vertex) {
                this.feature = vertex;
            }
            this.layer.events.triggerEvent("vertexmodified", {
                vertex: vertex.geometry,
                feature: this.feature,
                pixel: pixel
            });
        } else {
            if(vertex._index) {
                // dragging a virtual vertex
                vertex.geometry.parent.addComponent(vertex.geometry,
                                                    vertex._index);
                // move from virtual to real vertex
                delete vertex._index;
                OpenLayers.Util.removeItem(this.virtualVertices, vertex);
                this.vertices.push(vertex);
            } else if(vertex == this.dragHandle) {
                // dragging a drag handle
                this.layer.removeFeatures(this.vertices, {silent: true});
                this.vertices = [];
                if(this.radiusHandle) {
                    this.layer.destroyFeatures([this.radiusHandle], {silent: true});
                    this.radiusHandle = null;
                }
            } else if(vertex !== this.radiusHandle) {
                // dragging a real vertex
                this.layer.events.triggerEvent("vertexmodified", {
                    vertex: vertex.geometry,
                    feature: this.feature,
                    pixel: pixel
                });
            }
            // dragging a radius handle - no special treatment
            if(this.virtualVertices.length > 0) {
                this.layer.destroyFeatures(this.virtualVertices, {silent: true});
                this.virtualVertices = [];
            }
            this.layer.drawFeature(this.feature, this.standalone ? undefined :
                                            this.selectControl.renderIntent);
        }
        // keep the vertex on top so it gets the mouseout after dragging
        // this should be removed in favor of an option to draw under or
        // maintain node z-index
        this.layer.drawFeature(vertex);
    },
    
    /**
     * Method: dragComplete
     * Called by the drag feature control when the feature dragging is complete.
     *
     * Parameters:
     * vertex - {<OpenLayers.Feature.Vector>} The vertex being dragged.
     */
    dragComplete: function(vertex) {
        this.resetVertices();
        this.setFeatureState();
        this.onModification(this.feature);
        this.layer.events.triggerEvent("featuremodified", 
                                       {feature: this.feature});
    },
    
    /**
     * Method: setFeatureState
     * Called when the feature is modified.  If the current state is not
     *     INSERT or DELETE, the state is set to UPDATE.
     */
    setFeatureState: function() {
        if(this.feature.state != OpenLayers.State.INSERT &&
           this.feature.state != OpenLayers.State.DELETE) {
            this.feature.state = OpenLayers.State.UPDATE;
            if (this.modified && this._originalGeometry) {
                var feature = this.feature;
                feature.modified = OpenLayers.Util.extend(feature.modified, {
                    geometry: this._originalGeometry
                });
                delete this._originalGeometry;
            }
        }
    },
    
    /**
     * Method: resetVertices
     */
    resetVertices: function() {
        // if coming from a drag complete we're about to destroy the vertex
        // that was just dragged. For that reason, the drag feature control
        // will never detect a mouse-out on that vertex, meaning that the drag
        // handler won't be deactivated. This can cause errors because the drag
        // feature control still has a feature to drag but that feature is
        // destroyed. To prevent this, we call outFeature on the drag feature
        // control if the control actually has a feature to drag.
        if(this.dragControl.feature) {
            this.dragControl.outFeature(this.dragControl.feature);
        }
        if(this.vertices.length > 0) {
            this.layer.removeFeatures(this.vertices, {silent: true});
            this.vertices = [];
        }
        if(this.virtualVertices.length > 0) {
            this.layer.removeFeatures(this.virtualVertices, {silent: true});
            this.virtualVertices = [];
        }
        if(this.dragHandle) {
            this.layer.destroyFeatures([this.dragHandle], {silent: true});
            this.dragHandle = null;
        }
        if(this.radiusHandle) {
            this.layer.destroyFeatures([this.radiusHandle], {silent: true});
            this.radiusHandle = null;
        }
        if(this.feature &&
           this.feature.geometry.CLASS_NAME != "OpenLayers.Geometry.Point") {
            if((this.mode & OpenLayers.Control.ModifyFeature.DRAG)) {
                this.collectDragHandle();
            }
            if((this.mode & (OpenLayers.Control.ModifyFeature.ROTATE |
                             OpenLayers.Control.ModifyFeature.RESIZE))) {
                this.collectRadiusHandle();
            }
            if(this.mode & OpenLayers.Control.ModifyFeature.RESHAPE){
                // Don't collect vertices when we're resizing
                if (!(this.mode & OpenLayers.Control.ModifyFeature.RESIZE)){
                    this.collectVertices();
                }
            }
        }
    },
    
    /**
     * Method: handleKeypress
     * Called by the feature handler on keypress.  This is used to delete
     *     vertices. If the <deleteCode> property is set, vertices will
     *     be deleted when a feature is selected for modification and
     *     the mouse is over a vertex.
     *
     * Parameters:
     * evt - {Event} Keypress event.
     */
    handleKeypress: function(evt) {
        var code = evt.keyCode;
        
        // check for delete key
        if(this.feature &&
           OpenLayers.Util.indexOf(this.deleteCodes, code) != -1) {
            var vertex = this.dragControl.feature;
            if(vertex &&
               OpenLayers.Util.indexOf(this.vertices, vertex) != -1 &&
               !this.dragControl.handlers.drag.dragging &&
               vertex.geometry.parent) {
                // remove the vertex
                vertex.geometry.parent.removeComponent(vertex.geometry);
                this.layer.events.triggerEvent("vertexremoved", {
                    vertex: vertex.geometry,
                    feature: this.feature,
                    pixel: evt.xy
                });
                this.layer.drawFeature(this.feature, this.standalone ?
                                       undefined :
                                       this.selectControl.renderIntent);
                this.modified = true;
                this.resetVertices();
                this.setFeatureState();
                this.onModification(this.feature);
                this.layer.events.triggerEvent("featuremodified", 
                                               {feature: this.feature});
            }
        }
    },

    /**
     * Method: collectVertices
     * Collect the vertices from the modifiable feature's geometry and push
     *     them on to the control's vertices array.
     */
    collectVertices: function() {
        this.vertices = [];
        this.virtualVertices = [];        
        var control = this;
        function collectComponentVertices(geometry) {
            var i, vertex, component, len;
            if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
                vertex = new OpenLayers.Feature.Vector(geometry);
                vertex._sketch = true;
                vertex.renderIntent = control.vertexRenderIntent;
                control.vertices.push(vertex);
            } else {
                var numVert = geometry.components.length;
                if(geometry.CLASS_NAME == "OpenLayers.Geometry.LinearRing") {
                    numVert -= 1;
                }
                for(i=0; i<numVert; ++i) {
                    component = geometry.components[i];
                    if(component.CLASS_NAME == "OpenLayers.Geometry.Point") {
                        vertex = new OpenLayers.Feature.Vector(component);
                        vertex._sketch = true;
                        vertex.renderIntent = control.vertexRenderIntent;
                        control.vertices.push(vertex);
                    } else {
                        collectComponentVertices(component);
                    }
                }
                
                // add virtual vertices in the middle of each edge
                if (control.createVertices && geometry.CLASS_NAME != "OpenLayers.Geometry.MultiPoint") {
                    for(i=0, len=geometry.components.length; i<len-1; ++i) {
                        var prevVertex = geometry.components[i];
                        var nextVertex = geometry.components[i + 1];
                        if(prevVertex.CLASS_NAME == "OpenLayers.Geometry.Point" &&
                           nextVertex.CLASS_NAME == "OpenLayers.Geometry.Point") {
                            var x = (prevVertex.x + nextVertex.x) / 2;
                            var y = (prevVertex.y + nextVertex.y) / 2;
                            var point = new OpenLayers.Feature.Vector(
                                new OpenLayers.Geometry.Point(x, y),
                                null, control.virtualStyle
                            );
                            // set the virtual parent and intended index
                            point.geometry.parent = geometry;
                            point._index = i + 1;
                            point._sketch = true;
                            control.virtualVertices.push(point);
                        }
                    }
                }
            }
        }
        collectComponentVertices.call(this, this.feature.geometry);
        this.layer.addFeatures(this.virtualVertices, {silent: true});
        this.layer.addFeatures(this.vertices, {silent: true});
    },

    /**
     * Method: collectDragHandle
     * Collect the drag handle for the selected geometry.
     */
    collectDragHandle: function() {
        var geometry = this.feature.geometry;
        var center = geometry.getBounds().getCenterLonLat();
        var originGeometry = new OpenLayers.Geometry.Point(
            center.lon, center.lat
        );
        var origin = new OpenLayers.Feature.Vector(originGeometry);
        originGeometry.move = function(x, y) {
            OpenLayers.Geometry.Point.prototype.move.call(this, x, y);
            geometry.move(x, y);
        };
        origin._sketch = true;
        this.dragHandle = origin;
        this.dragHandle.renderIntent = this.vertexRenderIntent;
        this.layer.addFeatures([this.dragHandle], {silent: true});
    },

    /**
     * Method: collectRadiusHandle
     * Collect the radius handle for the selected geometry.
     */
    collectRadiusHandle: function() {
        var geometry = this.feature.geometry;
        var bounds = geometry.getBounds();
        var center = bounds.getCenterLonLat();
        var originGeometry = new OpenLayers.Geometry.Point(
            center.lon, center.lat
        );
        var radiusGeometry = new OpenLayers.Geometry.Point(
            bounds.right, bounds.bottom
        );
        var radius = new OpenLayers.Feature.Vector(radiusGeometry);
        var resize = (this.mode & OpenLayers.Control.ModifyFeature.RESIZE);
        var reshape = (this.mode & OpenLayers.Control.ModifyFeature.RESHAPE);
        var rotate = (this.mode & OpenLayers.Control.ModifyFeature.ROTATE);

        radiusGeometry.move = function(x, y) {
            OpenLayers.Geometry.Point.prototype.move.call(this, x, y);
            var dx1 = this.x - originGeometry.x;
            var dy1 = this.y - originGeometry.y;
            var dx0 = dx1 - x;
            var dy0 = dy1 - y;
            if(rotate) {
                var a0 = Math.atan2(dy0, dx0);
                var a1 = Math.atan2(dy1, dx1);
                var angle = a1 - a0;
                angle *= 180 / Math.PI;
                geometry.rotate(angle, originGeometry);
            }
            if(resize) {
                var scale, ratio;
                // 'resize' together with 'reshape' implies that the aspect 
                // ratio of the geometry will not be preserved whilst resizing 
                if (reshape) {
                    scale = dy1 / dy0;
                    ratio = (dx1 / dx0) / scale;
                } else {
                    var l0 = Math.sqrt((dx0 * dx0) + (dy0 * dy0));
                    var l1 = Math.sqrt((dx1 * dx1) + (dy1 * dy1));
                    scale = l1 / l0;
                }
                geometry.resize(scale, originGeometry, ratio);
            }
        };
        radius._sketch = true;
        this.radiusHandle = radius;
        this.radiusHandle.renderIntent = this.vertexRenderIntent;
        this.layer.addFeatures([this.radiusHandle], {silent: true});
    },

    /**
     * Method: setMap
     * Set the map property for the control and all handlers.
     *
     * Parameters:
     * map - {<OpenLayers.Map>} The control's map.
     */
    setMap: function(map) {
        this.standalone || this.selectControl.setMap(map);
        this.dragControl.setMap(map);
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
    },

    CLASS_NAME: "OpenLayers.Control.ModifyFeature"
});

/**
 * Constant: RESHAPE
 * {Integer} Constant used to make the control work in reshape mode
 */
OpenLayers.Control.ModifyFeature.RESHAPE = 1;
/**
 * Constant: RESIZE
 * {Integer} Constant used to make the control work in resize mode
 */
OpenLayers.Control.ModifyFeature.RESIZE = 2;
/**
 * Constant: ROTATE
 * {Integer} Constant used to make the control work in rotate mode
 */
OpenLayers.Control.ModifyFeature.ROTATE = 4;
/**
 * Constant: DRAG
 * {Integer} Constant used to make the control work in drag mode
 */
OpenLayers.Control.ModifyFeature.DRAG = 8;
/* ======================================================================
    OpenLayers/Layer/Bing.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/XYZ.js
 */

/** 
 * Class: OpenLayers.Layer.Bing
 * Bing layer using direct tile access as provided by Bing Maps REST Services.
 * See http://msdn.microsoft.com/en-us/library/ff701713.aspx for more
 * information. Note: Terms of Service compliant use requires the map to be
 * configured with an <OpenLayers.Control.Attribution> control and the
 * attribution placed on or near the map.
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.XYZ>
 */
OpenLayers.Layer.Bing = OpenLayers.Class(OpenLayers.Layer.XYZ, {

    /**
     * Property: key
     * {String} API key for Bing maps, get your own key 
     *     at http://bingmapsportal.com/ .
     */
    key: null,

    /**
     * Property: serverResolutions
     * {Array} the resolutions provided by the Bing servers.
     */
    serverResolutions: [
        156543.03390625, 78271.516953125, 39135.7584765625,
        19567.87923828125, 9783.939619140625, 4891.9698095703125,
        2445.9849047851562, 1222.9924523925781, 611.4962261962891,
        305.74811309814453, 152.87405654907226, 76.43702827453613,
        38.218514137268066, 19.109257068634033, 9.554628534317017,
        4.777314267158508, 2.388657133579254, 1.194328566789627,
        0.5971642833948135, 0.29858214169740677, 0.14929107084870338,
        0.07464553542435169
    ],
    
    /**
     * Property: attributionTemplate
     * {String}
     */
    attributionTemplate: '<span class="olBingAttribution ${type}">' +
         '<div><a target="_blank" href="http://www.bing.com/maps/">' +
         '<img src="${logo}" /></a></div>${copyrights}' +
         '<a style="white-space: nowrap" target="_blank" '+
         'href="http://www.microsoft.com/maps/product/terms.html">' +
         'Terms of Use</a></span>',

    /**
     * Property: metadata
     * {Object} Metadata for this layer, as returned by the callback script
     */
    metadata: null,
    
    /**
     * APIProperty: type
     * {String} The layer identifier.  Any non-birdseye imageryType
     *     from http://msdn.microsoft.com/en-us/library/ff701716.aspx can be
     *     used.  Default is "Road".
     */
    type: "Road",
    
    /**
     * APIProperty: culture
     * {String} The culture identifier.  See http://msdn.microsoft.com/en-us/library/ff701709.aspx
     * for the definition and the possible values.  Default is "en-US".
     */
    culture: "en-US",
    
    /**
     * APIProperty: metadataParams
     * {Object} Optional url parameters for the Get Imagery Metadata request
     * as described here: http://msdn.microsoft.com/en-us/library/ff701716.aspx
     */
    metadataParams: null,

    /** APIProperty: tileOptions
     *  {Object} optional configuration options for <OpenLayers.Tile> instances
     *  created by this Layer. Default is
     *
     *  (code)
     *  {crossOriginKeyword: 'anonymous'}
     *  (end)
     */
    tileOptions: null,

    /**
     * Constructor: OpenLayers.Layer.Bing
     * Create a new Bing layer.
     *
     * Example:
     * (code)
     * var road = new OpenLayers.Layer.Bing({
     *     name: "My Bing Aerial Layer",
     *     type: "Aerial",
     *     key: "my-api-key-here",
     * });
     * (end)
     *
     * Parameters:
     * options - {Object} Configuration properties for the layer.
     *
     * Required configuration properties:
     * key - {String} Bing Maps API key for your application. Get one at
     *     http://bingmapsportal.com/.
     * type - {String} The layer identifier.  Any non-birdseye imageryType
     *     from http://msdn.microsoft.com/en-us/library/ff701716.aspx can be
     *     used.
     *
     * Any other documented layer properties can be provided in the config object.
     */
    initialize: function(options) {
        options = OpenLayers.Util.applyDefaults({
            sphericalMercator: true
        }, options);
        var name = options.name || "Bing " + (options.type || this.type);
        
        var newArgs = [name, null, options];
        OpenLayers.Layer.XYZ.prototype.initialize.apply(this, newArgs);
        this.tileOptions = OpenLayers.Util.extend({
            crossOriginKeyword: 'anonymous'
        }, this.options.tileOptions);
        this.loadMetadata(); 
    },

    /**
     * Method: loadMetadata
     */
    loadMetadata: function() {
        this._callbackId = "_callback_" + this.id.replace(/\./g, "_");
        // link the processMetadata method to the global scope and bind it
        // to this instance
        window[this._callbackId] = OpenLayers.Function.bind(
            OpenLayers.Layer.Bing.processMetadata, this
        );
        var params = OpenLayers.Util.applyDefaults({
            key: this.key,
            jsonp: this._callbackId,
            include: "ImageryProviders"
        }, this.metadataParams);
        var url = "http://dev.virtualearth.net/REST/v1/Imagery/Metadata/" +
            this.type + "?" + OpenLayers.Util.getParameterString(params);
        var script = document.createElement("script");
        script.type = "text/javascript";
        script.src = url;
        script.id = this._callbackId;
        document.getElementsByTagName("head")[0].appendChild(script);
    },
    
    /**
     * Method: initLayer
     *
     * Sets layer properties according to the metadata provided by the API
     */
    initLayer: function() {
        var res = this.metadata.resourceSets[0].resources[0];
        var url = res.imageUrl.replace("{quadkey}", "${quadkey}");
        url = url.replace("{culture}", this.culture);
        this.url = [];
        for (var i=0; i<res.imageUrlSubdomains.length; ++i) {
            this.url.push(url.replace("{subdomain}", res.imageUrlSubdomains[i]));
        }
        this.addOptions({
            maxResolution: Math.min(
                this.serverResolutions[res.zoomMin],
                this.maxResolution || Number.POSITIVE_INFINITY
            ),
            numZoomLevels: Math.min(
                res.zoomMax + 1 - res.zoomMin, this.numZoomLevels
            )
        }, true);
    },

    /**
     * Method: getURL
     *
     * Paramters:
     * bounds - {<OpenLayers.Bounds>}
     */
    getURL: function(bounds) {
        if (!this.url) {
            return;
        }
        var xyz = this.getXYZ(bounds), x = xyz.x, y = xyz.y, z = xyz.z;
        var quadDigits = [];
        for (var i = z; i > 0; --i) {
            var digit = '0';
            var mask = 1 << (i - 1);
            if ((x & mask) != 0) {
                digit++;
            }
            if ((y & mask) != 0) {
                digit++;
                digit++;
            }
            quadDigits.push(digit);
        }
        var quadKey = quadDigits.join("");
        var url = this.selectUrl('' + x + y + z, this.url);

        return OpenLayers.String.format(url, {'quadkey': quadKey});
    },
    
    /**
     * Method: updateAttribution
     * Updates the attribution according to the requirements outlined in
     * http://gis.638310.n2.nabble.com/Bing-imagery-td5789168.html
     */
    updateAttribution: function() {
        var metadata = this.metadata;
        if (!metadata.resourceSets || !this.map || !this.map.center) {
            return;
        }
        var res = metadata.resourceSets[0].resources[0];
        var extent = this.map.getExtent().transform(
            this.map.getProjectionObject(),
            new OpenLayers.Projection("EPSG:4326")
        );
        var providers = res.imageryProviders,
            zoom = OpenLayers.Util.indexOf(this.serverResolutions,
                                           this.getServerResolution()),
            copyrights = "", provider, i, ii, j, jj, bbox, coverage;
        for (i=0,ii=providers.length; i<ii; ++i) {
            provider = providers[i];
            for (j=0,jj=provider.coverageAreas.length; j<jj; ++j) {
                coverage = provider.coverageAreas[j];
                // axis order provided is Y,X
                bbox = OpenLayers.Bounds.fromArray(coverage.bbox, true);
                if (extent.intersectsBounds(bbox) &&
                        zoom <= coverage.zoomMax && zoom >= coverage.zoomMin) {
                    copyrights += provider.attribution + " ";
                }
            }
        }
        this.attribution = OpenLayers.String.format(this.attributionTemplate, {
            type: this.type.toLowerCase(),
            logo: metadata.brandLogoUri,
            copyrights: copyrights
        });
        this.map && this.map.events.triggerEvent("changelayer", {
            layer: this,
            property: "attribution"
        });
    },
    
    /**
     * Method: setMap
     */
    setMap: function() {
        OpenLayers.Layer.XYZ.prototype.setMap.apply(this, arguments);
        this.updateAttribution();
        this.map.events.register("moveend", this, this.updateAttribution);
    },
    
    /**
     * APIMethod: clone
     * 
     * Parameters:
     * obj - {Object}
     * 
     * Returns:
     * {<OpenLayers.Layer.Bing>} An exact clone of this <OpenLayers.Layer.Bing>
     */
    clone: function(obj) {
        if (obj == null) {
            obj = new OpenLayers.Layer.Bing(this.options);
        }
        //get all additions from superclasses
        obj = OpenLayers.Layer.XYZ.prototype.clone.apply(this, [obj]);
        // copy/set any non-init, non-simple values here
        return obj;
    },
    
    /**
     * Method: destroy
     */
    destroy: function() {
        this.map &&
            this.map.events.unregister("moveend", this, this.updateAttribution);
        OpenLayers.Layer.XYZ.prototype.destroy.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Layer.Bing"
});

/**
 * Function: OpenLayers.Layer.Bing.processMetadata
 * This function will be bound to an instance, linked to the global scope with
 * an id, and called by the JSONP script returned by the API.
 *
 * Parameters:
 * metadata - {Object} metadata as returned by the API
 */
OpenLayers.Layer.Bing.processMetadata = function(metadata) {
    this.metadata = metadata;
    this.initLayer();
    var script = document.getElementById(this._callbackId);
    script.parentNode.removeChild(script);
    window[this._callbackId] = undefined; // cannot delete from window in IE
    delete this._callbackId;
};
/* ======================================================================
    OpenLayers/Layer/PointGrid.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Vector.js
 * @requires OpenLayers/Geometry/Polygon.js
 */

/**
 * Class: OpenLayers.Layer.PointGrid
 * A point grid layer dynamically generates a regularly spaced grid of point
 *     features.  This is a specialty layer for cases where an application needs
 *     a regular grid of points.  It can be used, for example, in an editing
 *     environment to snap to a grid.
 *
 * Create a new vector layer with the <OpenLayers.Layer.PointGrid> constructor.
 * (code)
 * // create a grid with points spaced at 10 map units
 * var points = new OpenLayers.Layer.PointGrid({dx: 10, dy: 10});
 *
 * // create a grid with different x/y spacing rotated 15 degrees clockwise.
 * var points = new OpenLayers.Layer.PointGrid({dx: 5, dy: 10, rotation: 15});
 * (end)
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Vector>
 */
OpenLayers.Layer.PointGrid = OpenLayers.Class(OpenLayers.Layer.Vector, {

    /**
     * APIProperty: dx
     * {Number} Point grid spacing in the x-axis direction (map units).  
     * Read-only.  Use the <setSpacing> method to modify this value.
     */
    dx: null,

    /**
     * APIProperty: dy
     * {Number} Point grid spacing in the y-axis direction (map units).  
     * Read-only.  Use the <setSpacing> method to modify this value.
     */
    dy: null,

    /**
     * APIProperty: ratio
     * {Number} Ratio of the desired grid size to the map viewport size.  
     * Default is 1.5.  Larger ratios mean the grid is recalculated less often 
     * while panning.  The <maxFeatures> setting has precedence when determining
     * grid size.  Read-only.  Use the <setRatio> method to modify this value.
     */
    ratio: 1.5,

    /**
     * APIProperty: maxFeatures
     * {Number} The maximum number of points to generate in the grid.  Default
     * is 250.  Read-only.  Use the <setMaxFeatures> method to modify this value.
     */
    maxFeatures: 250,

    /**
     * APIProperty: rotation
     * {Number} Grid rotation (in degrees clockwise from the positive x-axis).
     * Default is 0.  Read-only.  Use the <setRotation> method to modify this
     * value.
     */
    rotation: 0,

    /**
     * APIProperty: origin
     * {<OpenLayers.LonLat>} Grid origin.  The grid lattice will be aligned with 
     * the origin.  If not set at construction, the center of the map's maximum 
     * extent is used.  Read-only.  Use the <setOrigin> method to modify this 
     * value.
     */
    origin: null,

    /**
     * Property: gridBounds
     * {<OpenLayers.Bounds>}  Internally cached grid bounds (with optional 
     * rotation applied).
     */
    gridBounds: null,

    /**
     * Constructor: OpenLayers.Layer.PointGrid
     * Creates a new point grid layer.
     *
     * Parameters:
     * config - {Object} An object containing all configuration properties for
     *     the layer.  The <dx> and <dy> properties are required to be set at 
     *     construction.  Any other layer properties may be set in this object.
     */
    initialize: function(config) {
        config = config || {};
        OpenLayers.Layer.Vector.prototype.initialize.apply(this, [config.name, config]);
    },
    
    /** 
     * Method: setMap
     * The layer has been added to the map. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {        
        OpenLayers.Layer.Vector.prototype.setMap.apply(this, arguments);
        map.events.register("moveend", this, this.onMoveEnd);
    },

    /**
     * Method: removeMap
     * The layer has been removed from the map.
     *
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    removeMap: function(map) {
        map.events.unregister("moveend", this, this.onMoveEnd);
        OpenLayers.Layer.Vector.prototype.removeMap.apply(this, arguments);
    },
    
    /**
     * APIMethod: setRatio
     * Set the grid <ratio> property and update the grid.  Can only be called
     *     after the layer has been added to a map with a center/extent.
     *
     * Parameters:
     * ratio - {Number}
     */
    setRatio: function(ratio) {
        this.ratio = ratio;
        this.updateGrid(true);
    },
    
    /**
     * APIMethod: setMaxFeatures
     * Set the grid <maxFeatures> property and update the grid.  Can only be 
     *     called after the layer has been added to a map with a center/extent.
     *
     * Parameters:
     * maxFeatures - {Number}
     */
    setMaxFeatures: function(maxFeatures) {
        this.maxFeatures = maxFeatures;
        this.updateGrid(true);
    },

    /**
     * APIMethod: setSpacing
     * Set the grid <dx> and <dy> properties and update the grid.  If only one
     *     argument is provided, it will be set as <dx> and <dy>.  Can only be 
     *     called after the layer has been added to a map with a center/extent.
     *
     * Parameters:
     * dx - {Number}
     * dy - {Number}
     */
    setSpacing: function(dx, dy) {
        this.dx = dx;
        this.dy = dy || dx;
        this.updateGrid(true);
    },
    
    /**
     * APIMethod: setOrigin
     * Set the grid <origin> property and update the grid.  Can only be called
     *     after the layer has been added to a map with a center/extent.
     *
     * Parameters:
     * origin - {<OpenLayers.LonLat>}
     */
    setOrigin: function(origin) {
        this.origin = origin;
        this.updateGrid(true);
    },
    
    /**
     * APIMethod: getOrigin
     * Get the grid <origin> property.
     *
     * Returns:
     * {<OpenLayers.LonLat>} The grid origin.
     */
    getOrigin: function() {
        if (!this.origin) {
            this.origin = this.map.getExtent().getCenterLonLat();
        }
        return this.origin;
    },
    
    /**
     * APIMethod: setRotation
     * Set the grid <rotation> property and update the grid.  Rotation values
     *     are in degrees clockwise from the positive x-axis (negative values
     *     for counter-clockwise rotation).  Can only be called after the layer 
     *     has been added to a map with a center/extent.
     *
     * Parameters:
     * rotation - {Number} Degrees clockwise from the positive x-axis.
     */
    setRotation: function(rotation) {
        this.rotation = rotation;
        this.updateGrid(true);
    },
    
    /**
     * Method: onMoveEnd
     * Listener for map "moveend" events.
     */
    onMoveEnd: function() {
        this.updateGrid();
    },
    
    /**
     * Method: getViewBounds
     * Gets the (potentially rotated) view bounds for grid calculations.
     *
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getViewBounds: function() {
        var bounds = this.map.getExtent();
        if (this.rotation) {
            var origin = this.getOrigin();
            var rotationOrigin = new OpenLayers.Geometry.Point(origin.lon, origin.lat);
            var rect = bounds.toGeometry();
            rect.rotate(-this.rotation, rotationOrigin);
            bounds = rect.getBounds();
        }
        return bounds;
    },
    
    /**
     * Method: updateGrid
     * Update the grid.
     *
     * Parameters:
     * force - {Boolean} Update the grid even if the previous bounds are still
     *     valid.
     */
    updateGrid: function(force) {
        if (force || this.invalidBounds()) {
            var viewBounds = this.getViewBounds();
            var origin = this.getOrigin();
            var rotationOrigin = new OpenLayers.Geometry.Point(origin.lon, origin.lat);
            var viewBoundsWidth = viewBounds.getWidth();
            var viewBoundsHeight = viewBounds.getHeight();
            var aspectRatio = viewBoundsWidth / viewBoundsHeight;
            var maxHeight = Math.sqrt(this.dx * this.dy * this.maxFeatures / aspectRatio);
            var maxWidth = maxHeight * aspectRatio; 
            var gridWidth = Math.min(viewBoundsWidth * this.ratio, maxWidth);
            var gridHeight = Math.min(viewBoundsHeight * this.ratio, maxHeight);
            var center = viewBounds.getCenterLonLat();
            this.gridBounds = new OpenLayers.Bounds(
                center.lon - (gridWidth / 2),
                center.lat - (gridHeight / 2),
                center.lon + (gridWidth / 2),
                center.lat + (gridHeight / 2)
            );
            var rows = Math.floor(gridHeight / this.dy);
            var cols = Math.floor(gridWidth / this.dx);
            var gridLeft = origin.lon + (this.dx * Math.ceil((this.gridBounds.left - origin.lon) / this.dx));
            var gridBottom = origin.lat + (this.dy * Math.ceil((this.gridBounds.bottom - origin.lat) / this.dy));
            var features = new Array(rows * cols);
            var x, y, point;
            for (var i=0; i<cols; ++i) {
                x = gridLeft + (i * this.dx);
                for (var j=0; j<rows; ++j) {
                    y = gridBottom + (j * this.dy);
                    point = new OpenLayers.Geometry.Point(x, y);
                    if (this.rotation) {
                        point.rotate(this.rotation, rotationOrigin);
                    }
                    features[(i*rows)+j] = new OpenLayers.Feature.Vector(point);
                }
            }
            this.destroyFeatures(this.features, {silent: true});
            this.addFeatures(features, {silent: true});
        }
    },

    /**
     * Method: invalidBounds
     * Determine whether the previously generated point grid is invalid. 
     *     This occurs when the map bounds extends beyond the previously 
     *     generated grid bounds.
     *
     * Returns:
     * {Boolean} 
     */
    invalidBounds: function() {
        return !this.gridBounds || !this.gridBounds.containsBounds(this.getViewBounds());
    },

    CLASS_NAME: "OpenLayers.Layer.PointGrid"
    
});
/* ======================================================================
    OpenLayers/Handler/MouseWheel.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 */

/**
 * Class: OpenLayers.Handler.MouseWheel
 * Handler for wheel up/down events.
 * 
 * Inherits from:
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.MouseWheel = OpenLayers.Class(OpenLayers.Handler, {
    /** 
     * Property: wheelListener 
     * {function} 
     */
    wheelListener: null,

    /** 
     * Property: mousePosition
     * {<OpenLayers.Pixel>} mousePosition is necessary because
     * evt.clientX/Y is buggy in Moz on wheel events, so we cache and use the
     * value from the last mousemove.
     */
    mousePosition: null,

    /**
     * Property: interval
     * {Integer} In order to increase server performance, an interval (in 
     *     milliseconds) can be set to reduce the number of up/down events 
     *     called. If set, a new up/down event will not be set until the 
     *     interval has passed. 
     *     Defaults to 0, meaning no interval. 
     */
    interval: 0,
    
    /**
     * Property: delta
     * {Integer} When interval is set, delta collects the mousewheel z-deltas
     *     of the events that occur within the interval.
     *      See also the cumulative option
     */
    delta: 0,
    
    /**
     * Property: cumulative
     * {Boolean} When interval is set: true to collect all the mousewheel 
     *     z-deltas, false to only record the delta direction (positive or
     *     negative)
     */
    cumulative: true,

    /**
     * Constructor: OpenLayers.Handler.MouseWheel
     *
     * Parameters:
     * control - {<OpenLayers.Control>} 
     * callbacks - {Object} An object containing a single function to be
     *                          called when the drag operation is finished.
     *                          The callback should expect to recieve a single
     *                          argument, the point geometry.
     * options - {Object} 
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Handler.prototype.initialize.apply(this, arguments);
        this.wheelListener = OpenLayers.Function.bindAsEventListener(
            this.onWheelEvent, this
        );
    },

    /**
     * Method: destroy
     */    
    destroy: function() {
        OpenLayers.Handler.prototype.destroy.apply(this, arguments);
        this.wheelListener = null;
    },

    /**
     *  Mouse ScrollWheel code thanks to http://adomas.org/javascript-mouse-wheel/
     */

    /** 
     * Method: onWheelEvent
     * Catch the wheel event and handle it xbrowserly
     * 
     * Parameters:
     * e - {Event} 
     */
    onWheelEvent: function(e){
        
        // make sure we have a map and check keyboard modifiers
        if (!this.map || !this.checkModifiers(e)) {
            return;
        }
        
        // Ride up the element's DOM hierarchy to determine if it or any of 
        //  its ancestors was: 
        //   * specifically marked as scrollable
        //   * one of our layer divs
        //   * the map div
        //
        var overScrollableDiv = false;
        var overLayerDiv = false;
        var overMapDiv = false;
        
        var elem = OpenLayers.Event.element(e);
        while((elem != null) && !overMapDiv && !overScrollableDiv) {

            if (!overScrollableDiv) {
                try {
                    if (elem.currentStyle) {
                        overflow = elem.currentStyle["overflow"];
                    } else {
                        var style = 
                            document.defaultView.getComputedStyle(elem, null);
                        var overflow = style.getPropertyValue("overflow");
                    }
                    overScrollableDiv = ( overflow && 
                        (overflow == "auto") || (overflow == "scroll") );
                } catch(err) {
                    //sometimes when scrolling in a popup, this causes 
                    // obscure browser error
                }
            }

            if (!overLayerDiv) {
                for(var i=0, len=this.map.layers.length; i<len; i++) {
                    // Are we in the layer div? Note that we have two cases
                    // here: one is to catch EventPane layers, which have a 
                    // pane above the layer (layer.pane)
                    if (elem == this.map.layers[i].div 
                        || elem == this.map.layers[i].pane) { 
                        overLayerDiv = true;
                        break;
                    }
                }
            }
            overMapDiv = (elem == this.map.div);

            elem = elem.parentNode;
        }
        
        // Logic below is the following:
        //
        // If we are over a scrollable div or not over the map div:
        //  * do nothing (let the browser handle scrolling)
        //
        //    otherwise 
        // 
        //    If we are over the layer div: 
        //     * zoom/in out
        //     then
        //     * kill event (so as not to also scroll the page after zooming)
        //
        //       otherwise
        //
        //       Kill the event (dont scroll the page if we wheel over the 
        //        layerswitcher or the pan/zoom control)
        //
        if (!overScrollableDiv && overMapDiv) {
            if (overLayerDiv) {
                var delta = 0;
                if (!e) {
                    e = window.event;
                }
                if (e.wheelDelta) {
                    delta = e.wheelDelta/120; 
                    if (window.opera && window.opera.version() < 9.2) {
                        delta = -delta;
                    }
                } else if (e.detail) {
                    delta = -e.detail / 3;
                }
                this.delta = this.delta + delta;

                if(this.interval) {
                    window.clearTimeout(this._timeoutId);
                    this._timeoutId = window.setTimeout(
                        OpenLayers.Function.bind(function(){
                            this.wheelZoom(e);
                        }, this),
                        this.interval
                    );
                } else {
                    this.wheelZoom(e);
                }
            }
            OpenLayers.Event.stop(e);
        }
    },

    /**
     * Method: wheelZoom
     * Given the wheel event, we carry out the appropriate zooming in or out,
     *     based on the 'wheelDelta' or 'detail' property of the event.
     * 
     * Parameters:
     * e - {Event}
     */
    wheelZoom: function(e) {
        var delta = this.delta;
        this.delta = 0;
        
        if (delta) {
            // add the mouse position to the event because mozilla has 
            // a bug with clientX and clientY (see 
            // https://bugzilla.mozilla.org/show_bug.cgi?id=352179)
            // getLonLatFromViewPortPx(e) returns wrong values
            if (this.mousePosition) {
                e.xy = this.mousePosition;
            } 
            if (!e.xy) {
                // If the mouse hasn't moved over the map yet, then
                // we don't have a mouse position (in FF), so we just
                // act as if the mouse was at the center of the map.
                // Note that we can tell we are in the map -- and 
                // this.map is ensured to be true above.
                e.xy = this.map.getPixelFromLonLat(
                    this.map.getCenter()
                );
            }
            if (delta < 0) {
                this.callback("down", [e, this.cumulative ? delta : -1]);
            } else {
                this.callback("up", [e, this.cumulative ? delta : 1]);
            }
        }
    },
    
    /**
     * Method: mousemove
     * Update the stored mousePosition on every move.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousemove: function (evt) {
        this.mousePosition = evt.xy;
    },

    /**
     * Method: activate 
     */
    activate: function (evt) {
        if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            //register mousewheel events specifically on the window and document
            var wheelListener = this.wheelListener;
            OpenLayers.Event.observe(window, "DOMMouseScroll", wheelListener);
            OpenLayers.Event.observe(window, "mousewheel", wheelListener);
            OpenLayers.Event.observe(document, "mousewheel", wheelListener);
            return true;
        } else {
            return false;
        }
    },

    /**
     * Method: deactivate 
     */
    deactivate: function (evt) {
        if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            // unregister mousewheel events specifically on the window and document
            var wheelListener = this.wheelListener;
            OpenLayers.Event.stopObserving(window, "DOMMouseScroll", wheelListener);
            OpenLayers.Event.stopObserving(window, "mousewheel", wheelListener);
            OpenLayers.Event.stopObserving(document, "mousewheel", wheelListener);
            return true;
        } else {
            return false;
        }
    },

    CLASS_NAME: "OpenLayers.Handler.MouseWheel"
});
/* ======================================================================
    OpenLayers/Symbolizer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Symbolizer
 * Base class representing a symbolizer used for feature rendering.
 */
OpenLayers.Symbolizer = OpenLayers.Class({
    

    /**
     * APIProperty: zIndex
     * {Number} The zIndex determines the rendering order for a symbolizer.
     *     Symbolizers with larger zIndex values are rendered over symbolizers
     *     with smaller zIndex values.  Default is 0.
     */
    zIndex: 0,
    
    /**
     * Constructor: OpenLayers.Symbolizer
     * Instances of this class are not useful.  See one of the subclasses.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     symbolizer.  Any documented symbolizer property can be set at 
     *     construction.
     *
     * Returns:
     * A new symbolizer.
     */
    initialize: function(config) {
        OpenLayers.Util.extend(this, config);
    },
    
    /** 
     * APIMethod: clone
     * Create a copy of this symbolizer.
     *
     * Returns a symbolizer of the same type with the same properties.
     */
    clone: function() {
        var Type = eval(this.CLASS_NAME);
        return new Type(OpenLayers.Util.extend({}, this));
    },
    
    CLASS_NAME: "OpenLayers.Symbolizer"
    
});

/* ======================================================================
    OpenLayers/Symbolizer/Raster.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Symbolizer.js
 */

/**
 * Class: OpenLayers.Symbolizer.Raster
 * A symbolizer used to render raster images.
 */
OpenLayers.Symbolizer.Raster = OpenLayers.Class(OpenLayers.Symbolizer, {
    
    /**
     * Constructor: OpenLayers.Symbolizer.Raster
     * Create a symbolizer for rendering rasters.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     symbolizer.  Any documented symbolizer property can be set at 
     *     construction.
     *
     * Returns:
     * A new raster symbolizer.
     */
    initialize: function(config) {
        OpenLayers.Symbolizer.prototype.initialize.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Symbolizer.Raster"
    
});
/* ======================================================================
    OpenLayers/Rule.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Util.js
 * @requires OpenLayers/Style.js
 */

/**
 * Class: OpenLayers.Rule
 * This class represents an SLD Rule, as being used for rule-based SLD styling.
 */
OpenLayers.Rule = OpenLayers.Class({
    
    /**
     * Property: id
     * {String} A unique id for this session.
     */
    id: null,
    
    /**
     * APIProperty: name
     * {String} name of this rule
     */
    name: null,
    
    /**
     * Property: title
     * {String} Title of this rule (set if included in SLD)
     */
    title: null,
    
    /**
     * Property: description
     * {String} Description of this rule (set if abstract is included in SLD)
     */
    description: null,

    /**
     * Property: context
     * {Object} An optional object with properties that the rule should be
     * evaluated against. If no context is specified, feature.attributes will
     * be used.
     */
    context: null,
    
    /**
     * Property: filter
     * {<OpenLayers.Filter>} Optional filter for the rule.
     */
    filter: null,

    /**
     * Property: elseFilter
     * {Boolean} Determines whether this rule is only to be applied only if
     * no other rules match (ElseFilter according to the SLD specification). 
     * Default is false.  For instances of OpenLayers.Rule, if elseFilter is
     * false, the rule will always apply.  For subclasses, the else property is 
     * ignored.
     */
    elseFilter: false,
    
    /**
     * Property: symbolizer
     * {Object} Symbolizer or hash of symbolizers for this rule. If hash of
     * symbolizers, keys are one or more of ["Point", "Line", "Polygon"]. The
     * latter if useful if it is required to style e.g. vertices of a line
     * with a point symbolizer. Note, however, that this is not implemented
     * yet in OpenLayers, but it is the way how symbolizers are defined in
     * SLD.
     */
    symbolizer: null,
    
    /**
     * Property: symbolizers
     * {Array} Collection of symbolizers associated with this rule.  If 
     *     provided at construction, the symbolizers array has precedence
     *     over the deprecated symbolizer property.  Note that multiple 
     *     symbolizers are not currently supported by the vector renderers.
     *     Rules with multiple symbolizers are currently only useful for
     *     maintaining elements in an SLD document.
     */
    symbolizers: null,
    
    /**
     * APIProperty: minScaleDenominator
     * {Number} or {String} minimum scale at which to draw the feature.
     * In the case of a String, this can be a combination of text and
     * propertyNames in the form "literal ${propertyName}"
     */
    minScaleDenominator: null,

    /**
     * APIProperty: maxScaleDenominator
     * {Number} or {String} maximum scale at which to draw the feature.
     * In the case of a String, this can be a combination of text and
     * propertyNames in the form "literal ${propertyName}"
     */
    maxScaleDenominator: null,
    
    /** 
     * Constructor: OpenLayers.Rule
     * Creates a Rule.
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *           rule
     * 
     * Returns:
     * {<OpenLayers.Rule>}
     */
    initialize: function(options) {
        this.symbolizer = {};
        OpenLayers.Util.extend(this, options);
        if (this.symbolizers) {
            delete this.symbolizer;
        }
        this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
    },

    /** 
     * APIMethod: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {
        for (var i in this.symbolizer) {
            this.symbolizer[i] = null;
        }
        this.symbolizer = null;
        delete this.symbolizers;
    },
    
    /**
     * APIMethod: evaluate
     * evaluates this rule for a specific feature
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature>} feature to apply the rule to.
     * 
     * Returns:
     * {Boolean} true if the rule applies, false if it does not.
     * This rule is the default rule and always returns true.
     */
    evaluate: function(feature) {
        var context = this.getContext(feature);
        var applies = true;

        if (this.minScaleDenominator || this.maxScaleDenominator) {
            var scale = feature.layer.map.getScale();
        }
        
        // check if within minScale/maxScale bounds
        if (this.minScaleDenominator) {
            applies = scale >= OpenLayers.Style.createLiteral(
                    this.minScaleDenominator, context);
        }
        if (applies && this.maxScaleDenominator) {
            applies = scale < OpenLayers.Style.createLiteral(
                    this.maxScaleDenominator, context);
        }
        
        // check if optional filter applies
        if(applies && this.filter) {
            // feature id filters get the feature, others get the context
            if(this.filter.CLASS_NAME == "OpenLayers.Filter.FeatureId") {
                applies = this.filter.evaluate(feature);
            } else {
                applies = this.filter.evaluate(context);
            }
        }

        return applies;
    },
    
    /**
     * Method: getContext
     * Gets the context for evaluating this rule
     * 
     * Paramters:
     * feature - {<OpenLayers.Feature>} feature to take the context from if
     *           none is specified.
     */
    getContext: function(feature) {
        var context = this.context;
        if (!context) {
            context = feature.attributes || feature.data;
        }
        if (typeof this.context == "function") {
            context = this.context(feature);
        }
        return context;
    },
    
    /**
     * APIMethod: clone
     * Clones this rule.
     * 
     * Returns:
     * {<OpenLayers.Rule>} Clone of this rule.
     */
    clone: function() {
        var options = OpenLayers.Util.extend({}, this);
        if (this.symbolizers) {
            // clone symbolizers
            var len = this.symbolizers.length;
            options.symbolizers = new Array(len);
            for (var i=0; i<len; ++i) {
                options.symbolizers[i] = this.symbolizers[i].clone();
            }
        } else {
            // clone symbolizer
            options.symbolizer = {};
            var value, type;
            for(var key in this.symbolizer) {
                value = this.symbolizer[key];
                type = typeof value;
                if(type === "object") {
                    options.symbolizer[key] = OpenLayers.Util.extend({}, value);
                } else if(type === "string") {
                    options.symbolizer[key] = value;
                }
            }
        }
        // clone filter
        options.filter = this.filter && this.filter.clone();
        // clone context
        options.context = this.context && OpenLayers.Util.extend({}, this.context);
        return new OpenLayers.Rule(options);
    },
        
    CLASS_NAME: "OpenLayers.Rule"
});
/* ======================================================================
    OpenLayers/Filter/Spatial.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Filter.js
 */

/**
 * Class: OpenLayers.Filter.Spatial
 * This class represents a spatial filter.
 * Currently implemented: BBOX, DWithin and Intersects
 * 
 * Inherits from:
 * - <OpenLayers.Filter>
 */
OpenLayers.Filter.Spatial = OpenLayers.Class(OpenLayers.Filter, {

    /**
     * APIProperty: type
     * {String} Type of spatial filter.
     *
     * The type should be one of:
     * - OpenLayers.Filter.Spatial.BBOX
     * - OpenLayers.Filter.Spatial.INTERSECTS
     * - OpenLayers.Filter.Spatial.DWITHIN
     * - OpenLayers.Filter.Spatial.WITHIN
     * - OpenLayers.Filter.Spatial.CONTAINS
     */
    type: null,
    
    /**
     * APIProperty: property
     * {String} Name of the context property to compare.
     */
    property: null,
    
    /**
     * APIProperty: value
     * {<OpenLayers.Bounds> || <OpenLayers.Geometry>} The bounds or geometry
     *     to be used by the filter.  Use bounds for BBOX filters and geometry
     *     for INTERSECTS or DWITHIN filters.
     */
    value: null,

    /**
     * APIProperty: distance
     * {Number} The distance to use in a DWithin spatial filter.
     */
    distance: null,

    /**
     * APIProperty: distanceUnits
     * {String} The units to use for the distance, e.g. 'm'.
     */
    distanceUnits: null,
    
    /** 
     * Constructor: OpenLayers.Filter.Spatial
     * Creates a spatial filter.
     *
     * Parameters:
     * options - {Object} An optional object with properties to set on the
     *     filter.
     * 
     * Returns:
     * {<OpenLayers.Filter.Spatial>}
     */

   /**
    * Method: evaluate
    * Evaluates this filter for a specific feature.
    * 
    * Parameters:
    * feature - {<OpenLayers.Feature.Vector>} feature to apply the filter to.
    * 
    * Returns:
    * {Boolean} The feature meets filter criteria.
    */
    evaluate: function(feature) {
        var intersect = false;
        switch(this.type) {
            case OpenLayers.Filter.Spatial.BBOX:
            case OpenLayers.Filter.Spatial.INTERSECTS:
                if(feature.geometry) {
                    var geom = this.value;
                    if(this.value.CLASS_NAME == "OpenLayers.Bounds") {
                        geom = this.value.toGeometry();
                    }
                    if(feature.geometry.intersects(geom)) {
                        intersect = true;
                    }
                }
                break;
            default:
                throw new Error('evaluate is not implemented for this filter type.');
        }
        return intersect;
    },

    /**
     * APIMethod: clone
     * Clones this filter.
     * 
     * Returns:
     * {<OpenLayers.Filter.Spatial>} Clone of this filter.
     */
    clone: function() {
        var options = OpenLayers.Util.applyDefaults({
            value: this.value && this.value.clone && this.value.clone()
        }, this);
        return new OpenLayers.Filter.Spatial(options);
    },
    CLASS_NAME: "OpenLayers.Filter.Spatial"
});

OpenLayers.Filter.Spatial.BBOX = "BBOX";
OpenLayers.Filter.Spatial.INTERSECTS = "INTERSECTS";
OpenLayers.Filter.Spatial.DWITHIN = "DWITHIN";
OpenLayers.Filter.Spatial.WITHIN = "WITHIN";
OpenLayers.Filter.Spatial.CONTAINS = "CONTAINS";
/* ======================================================================
    OpenLayers/Format/SLD.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 * @requires OpenLayers/Style.js
 * @requires OpenLayers/Rule.js
 * @requires OpenLayers/Filter/FeatureId.js
 * @requires OpenLayers/Filter/Logical.js
 * @requires OpenLayers/Filter/Comparison.js
 * @requires OpenLayers/Filter/Spatial.js
 */

/**
 * Class: OpenLayers.Format.SLD
 * Read/Wite SLD. Create a new instance with the <OpenLayers.Format.SLD>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.SLD = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: profile
     * {String} If provided, use a custom profile.
     *
     * Currently supported profiles:
     * - GeoServer - parses GeoServer vendor specific capabilities for SLD.
     */
    profile: null,

    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.0.0".
     */
    defaultVersion: "1.0.0",
    
    /**
     * APIProperty: stringifyOutput
     * {Boolean} If true, write will return a string otherwise a DOMElement.
     * Default is true.
     */
    stringifyOutput: true,
    
    /**
     * APIProperty: namedLayersAsArray
     * {Boolean} Generate a namedLayers array.  If false, the namedLayers
     *     property value will be an object keyed by layer name. Default is
     *     false.
     */
    namedLayersAsArray: false,
    
    /**
     * APIMethod: write
     * Write a SLD document given a list of styles.
     *
     * Parameters:
     * sld - {Object} An object representing the SLD.
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} An SLD document string.
     */
    
    /**
     * APIMethod: read
     * Read and SLD doc and return an object representing the SLD.
     *
     * Parameters:
     * data - {String | DOMElement} Data to read.
     * options - {Object} Options for the reader.
     *
     * Returns:
     * {Object} An object representing the SLD.
     */

    CLASS_NAME: "OpenLayers.Format.SLD" 
});
/* ======================================================================
    OpenLayers/Symbolizer/Polygon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Symbolizer.js
 */

/**
 * Class: OpenLayers.Symbolizer.Polygon
 * A symbolizer used to render line features.
 */
OpenLayers.Symbolizer.Polygon = OpenLayers.Class(OpenLayers.Symbolizer, {
    
    /**
     * APIProperty: strokeColor
     * {String} Color for line stroke.  This is a RGB hex value (e.g. "#ff0000"
     *     for red).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeOpacity
     * {Number} Stroke opacity (0-1).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeWidth
     * {Number} Pixel stroke width.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeLinecap
     * {String} Stroke cap type ("butt", "round", or "square").
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * Property: strokeDashstyle
     * {String} Stroke dash style according to the SLD spec. Note that the
     *     OpenLayers values for strokeDashstyle ("dot", "dash", "dashdot",
     *     "longdash", "longdashdot", or "solid") will not work in SLD, but
     *     most SLD patterns will render correctly in OpenLayers.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * APIProperty: fillColor
     * {String} RGB hex fill color (e.g. "#ff0000" for red).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: fillOpacity
     * {Number} Fill opacity (0-1).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * Constructor: OpenLayers.Symbolizer.Polygon
     * Create a symbolizer for rendering polygons.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     symbolizer.  Any documented symbolizer property can be set at 
     *     construction.
     *
     * Returns:
     * A new polygon symbolizer.
     */
    initialize: function(config) {
        OpenLayers.Symbolizer.prototype.initialize.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Symbolizer.Polygon"
    
});

/* ======================================================================
    OpenLayers/Format/GML/v2.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/GML/Base.js
 */

/**
 * Class: OpenLayers.Format.GML.v2
 * Parses GML version 2.
 *
 * Inherits from:
 *  - <OpenLayers.Format.GML.Base>
 */
OpenLayers.Format.GML.v2 = OpenLayers.Class(OpenLayers.Format.GML.Base, {
    
    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocation: "http://www.opengis.net/gml http://schemas.opengis.net/gml/2.1.2/feature.xsd",

    /**
     * Constructor: OpenLayers.Format.GML.v2
     * Create a parser for GML v2.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     *
     * Valid options properties:
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (required).
     * geometryName - {String} Geometry element name.
     */
    initialize: function(options) {
        OpenLayers.Format.GML.Base.prototype.initialize.apply(this, [options]);
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "gml": OpenLayers.Util.applyDefaults({
            "outerBoundaryIs": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                container.outer = obj.components[0];
            },
            "innerBoundaryIs": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                container.inner.push(obj.components[0]);
            },
            "Box": function(node, container) {
                var obj = {};
                this.readChildNodes(node, obj);
                if(!container.components) {
                    container.components = [];
                }
                var min = obj.points[0];
                var max = obj.points[1];
                container.components.push(
                    new OpenLayers.Bounds(min.x, min.y, max.x, max.y)
                );
            }
        }, OpenLayers.Format.GML.Base.prototype.readers["gml"]),
        "feature": OpenLayers.Format.GML.Base.prototype.readers["feature"],
        "wfs": OpenLayers.Format.GML.Base.prototype.readers["wfs"]
    },

    /**
     * Method: write
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>) | OpenLayers.Feature.Vector}
     *     An array of features or a single feature.
     *
     * Returns:
     * {String} Given an array of features, a doc with a gml:featureMembers
     *     element will be returned.  Given a single feature, a doc with a
     *     gml:featureMember element will be returned.
     */
    write: function(features) {
        var name;
        if(OpenLayers.Util.isArray(features)) {
            // GML2 only has abstract feature collections
            // wfs provides a feature collection from a well-known schema
            name = "wfs:FeatureCollection";
        } else {
            name = "gml:featureMember";
        }
        var root = this.writeNode(name, features);
        this.setAttributeNS(
            root, this.namespaces["xsi"],
            "xsi:schemaLocation", this.schemaLocation
        );

        return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "gml": OpenLayers.Util.applyDefaults({
            "Point": function(geometry) {
                var node = this.createElementNSPlus("gml:Point");
                this.writeNode("coordinates", [geometry], node);
                return node;
            },
            "coordinates": function(points) {
                var numPoints = points.length;
                var parts = new Array(numPoints);
                var point;
                for(var i=0; i<numPoints; ++i) {
                    point = points[i];
                    if(this.xy) {
                        parts[i] = point.x + "," + point.y;
                    } else {
                        parts[i] = point.y + "," + point.x;
                    }
                    if(point.z != undefined) { // allow null or undefined
                        parts[i] += "," + point.z;
                    }
                }
                return this.createElementNSPlus("gml:coordinates", {
                    attributes: {
                        decimal: ".", cs: ",", ts: " "
                    },
                    value: (numPoints == 1) ? parts[0] : parts.join(" ")
                });
            },
            "LineString": function(geometry) {
                var node = this.createElementNSPlus("gml:LineString");
                this.writeNode("coordinates", geometry.components, node);
                return node;
            },
            "Polygon": function(geometry) {
                var node = this.createElementNSPlus("gml:Polygon");
                this.writeNode("outerBoundaryIs", geometry.components[0], node);
                for(var i=1; i<geometry.components.length; ++i) {
                    this.writeNode(
                        "innerBoundaryIs", geometry.components[i], node
                    );
                }
                return node;
            },
            "outerBoundaryIs": function(ring) {
                var node = this.createElementNSPlus("gml:outerBoundaryIs");
                this.writeNode("LinearRing", ring, node);
                return node;
            },
            "innerBoundaryIs": function(ring) {
                var node = this.createElementNSPlus("gml:innerBoundaryIs");
                this.writeNode("LinearRing", ring, node);
                return node;
            },
            "LinearRing": function(ring) {
                var node = this.createElementNSPlus("gml:LinearRing");
                this.writeNode("coordinates", ring.components, node);
                return node;
            },
            "Box": function(bounds) {
                var node = this.createElementNSPlus("gml:Box");
                this.writeNode("coordinates", [
                    {x: bounds.left, y: bounds.bottom},
                    {x: bounds.right, y: bounds.top}
                ], node);
                // srsName attribute is optional for gml:Box
                if(this.srsName) {
                    node.setAttribute("srsName", this.srsName);
                }
                return node;
            }
        }, OpenLayers.Format.GML.Base.prototype.writers["gml"]),
        "feature": OpenLayers.Format.GML.Base.prototype.writers["feature"],
        "wfs": OpenLayers.Format.GML.Base.prototype.writers["wfs"]
    },
    
    CLASS_NAME: "OpenLayers.Format.GML.v2" 

});
/* ======================================================================
    OpenLayers/Format/Filter/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/GML/v2.js
 * @requires OpenLayers/Format/Filter/v1.js
 */

/**
 * Class: OpenLayers.Format.Filter.v1_0_0
 * Write ogc:Filter version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.GML.v2>
 *  - <OpenLayers.Format.Filter.v1>
 */
OpenLayers.Format.Filter.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.GML.v2, OpenLayers.Format.Filter.v1, {
    
    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/ogc/filter/1.0.0/filter.xsd
     */
    schemaLocation: "http://www.opengis.net/ogc/filter/1.0.0/filter.xsd",

    /**
     * Constructor: OpenLayers.Format.Filter.v1_0_0
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.Filter> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.GML.v2.prototype.initialize.apply(
            this, [options]
        );
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "ogc": OpenLayers.Util.applyDefaults({
            "PropertyIsEqualTo": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.EQUAL_TO
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsNotEqualTo": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.NOT_EQUAL_TO
                });
                this.readChildNodes(node, filter);
                obj.filters.push(filter);
            },
            "PropertyIsLike": function(node, obj) {
                var filter = new OpenLayers.Filter.Comparison({
                    type: OpenLayers.Filter.Comparison.LIKE
                });
                this.readChildNodes(node, filter);
                var wildCard = node.getAttribute("wildCard");
                var singleChar = node.getAttribute("singleChar");
                var esc = node.getAttribute("escape");
                filter.value2regex(wildCard, singleChar, esc);
                obj.filters.push(filter);
            }
        }, OpenLayers.Format.Filter.v1.prototype.readers["ogc"]),
        "gml": OpenLayers.Format.GML.v2.prototype.readers["gml"],
        "feature": OpenLayers.Format.GML.v2.prototype.readers["feature"]        
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "ogc": OpenLayers.Util.applyDefaults({
            "PropertyIsEqualTo": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsEqualTo");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsNotEqualTo": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsNotEqualTo");
                // no ogc:expression handling for PropertyName for now
                this.writeNode("PropertyName", filter, node);
                // handle Literals or Functions for now
                this.writeOgcExpression(filter.value, node);
                return node;
            },
            "PropertyIsLike": function(filter) {
                var node = this.createElementNSPlus("ogc:PropertyIsLike", {
                    attributes: {
                        wildCard: "*", singleChar: ".", escape: "!"
                    }
                });
                // no ogc:expression handling for now
                this.writeNode("PropertyName", filter, node);
                // convert regex string to ogc string
                this.writeNode("Literal", filter.regex2value(), node);
                return node;
            },
            "BBOX": function(filter) {
                var node = this.createElementNSPlus("ogc:BBOX");
                // PropertyName is mandatory in 1.0.0, but e.g. GeoServer also
                // accepts filters without it. When this is used with
                // OpenLayers.Protocol.WFS, OpenLayers.Format.WFST will set a
                // missing filter.property to the geometryName that is
                // configured with the protocol, which defaults to "the_geom".
                // So the only way to omit this mandatory property is to not
                // set the property on the filter and to set the geometryName
                // on the WFS protocol to null. The latter also happens when
                // the protocol is configured without a geometryName and a
                // featureNS.
                filter.property && this.writeNode("PropertyName", filter, node);
                var box = this.writeNode("gml:Box", filter.value, node);
                if(filter.projection) {
                    box.setAttribute("srsName", filter.projection);
                }
                return node;
            }
        }, OpenLayers.Format.Filter.v1.prototype.writers["ogc"]),
        "gml": OpenLayers.Format.GML.v2.prototype.writers["gml"],
        "feature": OpenLayers.Format.GML.v2.prototype.writers["feature"]
    },

    /**
     * Method: writeSpatial
     *
     * Read a {<OpenLayers.Filter.Spatial>} filter and converts it into XML.
     *
     * Parameters:
     * filter - {<OpenLayers.Filter.Spatial>} The filter.
     * name - {String} Name of the generated XML element.
     *
     * Returns:
     * {DOMElement} The created XML element.
     */
    writeSpatial: function(filter, name) {
        var node = this.createElementNSPlus("ogc:"+name);
        this.writeNode("PropertyName", filter, node);
        if(filter.value instanceof OpenLayers.Filter.Function) {
            this.writeNode("Function", filter.value, node);
        } else {
        var child;
        if(filter.value instanceof OpenLayers.Geometry) {
            child = this.writeNode("feature:_geometry", filter.value).firstChild;
        } else {
            child = this.writeNode("gml:Box", filter.value);
        }
        if(filter.projection) {
            child.setAttribute("srsName", filter.projection);
        }
        node.appendChild(child);
        }
        return node;
    },


    CLASS_NAME: "OpenLayers.Format.Filter.v1_0_0" 

});
/* ======================================================================
    OpenLayers/Format/WFST/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WFST/v1.js
 * @requires OpenLayers/Format/Filter/v1_0_0.js
 */

/**
 * Class: OpenLayers.Format.WFST.v1_0_0
 * A format for creating WFS v1.0.0 transactions.  Create a new instance with the
 *     <OpenLayers.Format.WFST.v1_0_0> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.Filter.v1_0_0>
 *  - <OpenLayers.Format.WFST.v1>
 */
OpenLayers.Format.WFST.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.Filter.v1_0_0, OpenLayers.Format.WFST.v1, {
    
    /**
     * Property: version
     * {String} WFS version number.
     */
    version: "1.0.0",

    /**
     * APIProperty: srsNameInQuery
     * {Boolean} If true the reference system is passed in Query requests
     *     via the "srsName" attribute to the "wfs:Query" element, this
     *     property defaults to false as it isn't WFS 1.0.0 compliant.
     */
    srsNameInQuery: false,
    
    /**
     * Property: schemaLocations
     * {Object} Properties are namespace aliases, values are schema locations.
     */
    schemaLocations: {
        "wfs": "http://schemas.opengis.net/wfs/1.0.0/WFS-transaction.xsd"
    },

    /**
     * Constructor: OpenLayers.Format.WFST.v1_0_0
     * A class for parsing and generating WFS v1.0.0 transactions.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (optional).
     * featurePrefix - {String} Feature namespace alias (optional - only used
     *     if featureNS is provided).  Default is 'feature'.
     * geometryName - {String} Name of geometry attribute.  Default is 'the_geom'.
     */
    initialize: function(options) {
        OpenLayers.Format.Filter.v1_0_0.prototype.initialize.apply(this, [options]);
        OpenLayers.Format.WFST.v1.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * Method: readNode
     * Shorthand for applying one of the named readers given the node
     *     namespace and local name.  Readers take two args (node, obj) and
     *     generally extend or modify the second.
     *
     * Parameters:
     * node - {DOMElement} The node to be read (required).
     * obj - {Object} The object to be modified (optional).
     * first - {Boolean} Should be set to true for the first node read. This
     *     is usually the readNode call in the read method. Without this being
     *     set, auto-configured properties will stick on subsequent reads.
     *
     * Returns:
     * {Object} The input object, modified (or a new one if none was provided).
     */
    readNode: function(node, obj, first) {
        // Not the superclass, only the mixin classes inherit from
        // Format.GML.v2. We need this because we don't want to get readNode
        // from the superclass's superclass, which is OpenLayers.Format.XML.
        return OpenLayers.Format.GML.v2.prototype.readNode.apply(this, [node, obj]);
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wfs": OpenLayers.Util.applyDefaults({
            "WFS_TransactionResponse": function(node, obj) {
                obj.insertIds = [];
                obj.success = false;
                this.readChildNodes(node, obj);
            },
            "InsertResult": function(node, container) {
                var obj = {fids: []};
                this.readChildNodes(node, obj);
                container.insertIds.push(obj.fids[0]);
            },
            "TransactionResult": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Status": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "SUCCESS": function(node, obj) {
                obj.success = true;
            }
        }, OpenLayers.Format.WFST.v1.prototype.readers["wfs"]),
        "gml": OpenLayers.Format.GML.v2.prototype.readers["gml"],
        "feature": OpenLayers.Format.GML.v2.prototype.readers["feature"],
        "ogc": OpenLayers.Format.Filter.v1_0_0.prototype.readers["ogc"]
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "wfs": OpenLayers.Util.applyDefaults({
            "Query": function(options) {
                options = OpenLayers.Util.extend({
                    featureNS: this.featureNS,
                    featurePrefix: this.featurePrefix,
                    featureType: this.featureType,
                    srsName: this.srsName,
                    srsNameInQuery: this.srsNameInQuery
                }, options);
                var prefix = options.featurePrefix;
                var node = this.createElementNSPlus("wfs:Query", {
                    attributes: {
                        typeName: (prefix ? prefix + ":" : "") +
                            options.featureType
                    }
                });
                if(options.srsNameInQuery && options.srsName) {
                    node.setAttribute("srsName", options.srsName);
                }
                if(options.featureNS) {
                    node.setAttribute("xmlns:" + prefix, options.featureNS);
                }
                if(options.propertyNames) {
                    for(var i=0,len = options.propertyNames.length; i<len; i++) {
                        this.writeNode(
                            "ogc:PropertyName", 
                            {property: options.propertyNames[i]},
                            node
                        );
                    }
                }
                if(options.filter) {
                    this.setFilterProperty(options.filter);
                    this.writeNode("ogc:Filter", options.filter, node);
                }
                return node;
            }
        }, OpenLayers.Format.WFST.v1.prototype.writers["wfs"]),
        "gml": OpenLayers.Format.GML.v2.prototype.writers["gml"],
        "feature": OpenLayers.Format.GML.v2.prototype.writers["feature"],
        "ogc": OpenLayers.Format.Filter.v1_0_0.prototype.writers["ogc"]
    },
   
    CLASS_NAME: "OpenLayers.Format.WFST.v1_0_0" 
});
/* ======================================================================
    OpenLayers/Renderer/Elements.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Renderer.js
 */

/**
 * Class: OpenLayers.ElementsIndexer
 * This class takes care of figuring out which order elements should be
 *     placed in the DOM based on given indexing methods. 
 */
OpenLayers.ElementsIndexer = OpenLayers.Class({
   
    /**
     * Property: maxZIndex
     * {Integer} This is the largest-most z-index value for a node
     *     contained within the indexer.
     */
    maxZIndex: null,
    
    /**
     * Property: order
     * {Array<String>} This is an array of node id's stored in the
     *     order that they should show up on screen. Id's higher up in the
     *     array (higher array index) represent nodes with higher z-indeces.
     */
    order: null, 
    
    /**
     * Property: indices
     * {Object} This is a hash that maps node ids to their z-index value
     *     stored in the indexer. This is done to make finding a nodes z-index 
     *     value O(1).
     */
    indices: null,
    
    /**
     * Property: compare
     * {Function} This is the function used to determine placement of
     *     of a new node within the indexer. If null, this defaults to to
     *     the Z_ORDER_DRAWING_ORDER comparison method.
     */
    compare: null,
    
    /**
     * APIMethod: initialize
     * Create a new indexer with 
     * 
     * Parameters:
     * yOrdering - {Boolean} Whether to use y-ordering.
     */
    initialize: function(yOrdering) {

        this.compare = yOrdering ? 
            OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER_Y_ORDER :
            OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER_DRAWING_ORDER;

        this.clear();
    },
    
    /**
     * APIMethod: insert
     * Insert a new node into the indexer. In order to find the correct 
     *     positioning for the node to be inserted, this method uses a binary 
     *     search. This makes inserting O(log(n)). 
     * 
     * Parameters:
     * newNode - {DOMElement} The new node to be inserted.
     * 
     * Returns
     * {DOMElement} the node before which we should insert our newNode, or
     *     null if newNode can just be appended.
     */
    insert: function(newNode) {
        // If the node is known to the indexer, remove it so we can
        // recalculate where it should go.
        if (this.exists(newNode)) {
            this.remove(newNode);
        }
        
        var nodeId = newNode.id;
        
        this.determineZIndex(newNode);       

        var leftIndex = -1;
        var rightIndex = this.order.length;
        var middle;

        while (rightIndex - leftIndex > 1) {
            middle = parseInt((leftIndex + rightIndex) / 2);
            
            var placement = this.compare(this, newNode,
                OpenLayers.Util.getElement(this.order[middle]));
            
            if (placement > 0) {
                leftIndex = middle;
            } else {
                rightIndex = middle;
            } 
        }
        
        this.order.splice(rightIndex, 0, nodeId);
        this.indices[nodeId] = this.getZIndex(newNode);
        
        // If the new node should be before another in the index
        // order, return the node before which we have to insert the new one;
        // else, return null to indicate that the new node can be appended.
        return this.getNextElement(rightIndex);
    },
    
    /**
     * APIMethod: remove
     * 
     * Parameters:
     * node - {DOMElement} The node to be removed.
     */
    remove: function(node) {
        var nodeId = node.id;
        var arrayIndex = OpenLayers.Util.indexOf(this.order, nodeId);
        if (arrayIndex >= 0) {
            // Remove it from the order array, as well as deleting the node
            // from the indeces hash.
            this.order.splice(arrayIndex, 1);
            delete this.indices[nodeId];
            
            // Reset the maxium z-index based on the last item in the 
            // order array.
            if (this.order.length > 0) {
                var lastId = this.order[this.order.length - 1];
                this.maxZIndex = this.indices[lastId];
            } else {
                this.maxZIndex = 0;
            }
        }
    },
    
    /**
     * APIMethod: clear
     */
    clear: function() {
        this.order = [];
        this.indices = {};
        this.maxZIndex = 0;
    },
    
    /**
     * APIMethod: exists
     *
     * Parameters:
     * node - {DOMElement} The node to test for existence.
     *
     * Returns:
     * {Boolean} Whether or not the node exists in the indexer?
     */
    exists: function(node) {
        return (this.indices[node.id] != null);
    },

    /**
     * APIMethod: getZIndex
     * Get the z-index value for the current node from the node data itself.
     * 
     * Parameters:
     * node - {DOMElement} The node whose z-index to get.
     * 
     * Returns:
     * {Integer} The z-index value for the specified node (from the node 
     *     data itself).
     */
    getZIndex: function(node) {
        return node._style.graphicZIndex;  
    },
    
    /**
     * Method: determineZIndex
     * Determine the z-index for the current node if there isn't one, 
     *     and set the maximum value if we've found a new maximum.
     * 
     * Parameters:
     * node - {DOMElement} 
     */
    determineZIndex: function(node) {
        var zIndex = node._style.graphicZIndex;
        
        // Everything must have a zIndex. If none is specified,
        // this means the user *must* (hint: assumption) want this
        // node to succomb to drawing order. To enforce drawing order
        // over all indexing methods, we'll create a new z-index that's
        // greater than any currently in the indexer.
        if (zIndex == null) {
            zIndex = this.maxZIndex;
            node._style.graphicZIndex = zIndex; 
        } else if (zIndex > this.maxZIndex) {
            this.maxZIndex = zIndex;
        }
    },

    /**
     * APIMethod: getNextElement
     * Get the next element in the order stack.
     * 
     * Parameters:
     * index - {Integer} The index of the current node in this.order.
     * 
     * Returns:
     * {DOMElement} the node following the index passed in, or
     *     null.
     */
    getNextElement: function(index) {
        var nextIndex = index + 1;
        if (nextIndex < this.order.length) {
            var nextElement = OpenLayers.Util.getElement(this.order[nextIndex]);
            if (nextElement == undefined) {
                nextElement = this.getNextElement(nextIndex);
            }
            return nextElement;
        } else {
            return null;
        } 
    },
    
    CLASS_NAME: "OpenLayers.ElementsIndexer"
});

/**
 * Namespace: OpenLayers.ElementsIndexer.IndexingMethods
 * These are the compare methods for figuring out where a new node should be 
 *     placed within the indexer. These methods are very similar to general 
 *     sorting methods in that they return -1, 0, and 1 to specify the 
 *     direction in which new nodes fall in the ordering.
 */
OpenLayers.ElementsIndexer.IndexingMethods = {
    
    /**
     * Method: Z_ORDER
     * This compare method is used by other comparison methods.
     *     It can be used individually for ordering, but is not recommended,
     *     because it doesn't subscribe to drawing order.
     * 
     * Parameters:
     * indexer - {<OpenLayers.ElementsIndexer>}
     * newNode - {DOMElement}
     * nextNode - {DOMElement}
     * 
     * Returns:
     * {Integer}
     */
    Z_ORDER: function(indexer, newNode, nextNode) {
        var newZIndex = indexer.getZIndex(newNode);

        var returnVal = 0;
        if (nextNode) {
            var nextZIndex = indexer.getZIndex(nextNode);
            returnVal = newZIndex - nextZIndex; 
        }
        
        return returnVal;
    },

    /**
     * APIMethod: Z_ORDER_DRAWING_ORDER
     * This method orders nodes by their z-index, but does so in a way
     *     that, if there are other nodes with the same z-index, the newest 
     *     drawn will be the front most within that z-index. This is the 
     *     default indexing method.
     * 
     * Parameters:
     * indexer - {<OpenLayers.ElementsIndexer>}
     * newNode - {DOMElement}
     * nextNode - {DOMElement}
     * 
     * Returns:
     * {Integer}
     */
    Z_ORDER_DRAWING_ORDER: function(indexer, newNode, nextNode) {
        var returnVal = OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER(
            indexer, 
            newNode, 
            nextNode
        );
        
        // Make Z_ORDER subscribe to drawing order by pushing it above
        // all of the other nodes with the same z-index.
        if (nextNode && returnVal == 0) {
            returnVal = 1;
        }
        
        return returnVal;
    },

    /**
     * APIMethod: Z_ORDER_Y_ORDER
     * This one should really be called Z_ORDER_Y_ORDER_DRAWING_ORDER, as it
     *     best describes which ordering methods have precedence (though, the 
     *     name would be too long). This method orders nodes by their z-index, 
     *     but does so in a way that, if there are other nodes with the same 
     *     z-index, the nodes with the lower y position will be "closer" than 
     *     those with a higher y position. If two nodes have the exact same y 
     *     position, however, then this method will revert to using drawing  
     *     order to decide placement.
     * 
     * Parameters:
     * indexer - {<OpenLayers.ElementsIndexer>}
     * newNode - {DOMElement}
     * nextNode - {DOMElement}
     * 
     * Returns:
     * {Integer}
     */
    Z_ORDER_Y_ORDER: function(indexer, newNode, nextNode) {
        var returnVal = OpenLayers.ElementsIndexer.IndexingMethods.Z_ORDER(
            indexer, 
            newNode, 
            nextNode
        );
        
        if (nextNode && returnVal === 0) {            
            var result = nextNode._boundsBottom - newNode._boundsBottom;
            returnVal = (result === 0) ? 1 : result;
        }
        
        return returnVal;       
    }
};

/**
 * Class: OpenLayers.Renderer.Elements
 * This is another virtual class in that it should never be instantiated by 
 *  itself as a Renderer. It exists because there is *tons* of shared 
 *  functionality between different vector libraries which use nodes/elements
 *  as a base for rendering vectors. 
 * 
 * The highlevel bits of code that are implemented here are the adding and 
 *  removing of geometries, which is essentially the same for any 
 *  element-based renderer. The details of creating each node and drawing the
 *  paths are of course different, but the machinery is the same. 
 * 
 * Inherits:
 *  - <OpenLayers.Renderer>
 */
OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {

    /**
     * Property: rendererRoot
     * {DOMElement}
     */
    rendererRoot: null,
    
    /**
     * Property: root
     * {DOMElement}
     */
    root: null,
    
    /**
     * Property: vectorRoot
     * {DOMElement}
     */
    vectorRoot: null,

    /**
     * Property: textRoot
     * {DOMElement}
     */
    textRoot: null,

    /**
     * Property: xmlns
     * {String}
     */    
    xmlns: null,
    
    /**
     * Property: xOffset
     * {Number} Offset to apply to the renderer viewport translation in x
     * direction. If the renderer extent's center is on the right of the
     * dateline (i.e. exceeds the world bounds), we shift the viewport to the
     * left by one world width. This avoids that features disappear from the
     * map viewport. Because our dateline handling logic in other places
     * ensures that extents crossing the dateline always have a center
     * exceeding the world bounds on the left, we need this offset to make sure
     * that the same is true for the renderer extent in pixel space as well.
     */
    xOffset: 0,
    
    /**
     * Property: rightOfDateLine
     * {Boolean} Keeps track of the location of the map extent relative to the
     * date line. The <setExtent> method compares this value (which is the one
     * from the previous <setExtent> call) with the current position of the map
     * extent relative to the date line and updates the xOffset when the extent
     * has moved from one side of the date line to the other.
     */
    
    /**
     * Property: Indexer
     * {<OpenLayers.ElementIndexer>} An instance of OpenLayers.ElementsIndexer 
     *     created upon initialization if the zIndexing or yOrdering options
     *     passed to this renderer's constructor are set to true.
     */
    indexer: null, 
    
    /**
     * Constant: BACKGROUND_ID_SUFFIX
     * {String}
     */
    BACKGROUND_ID_SUFFIX: "_background",
    
    /**
     * Constant: LABEL_ID_SUFFIX
     * {String}
     */
    LABEL_ID_SUFFIX: "_label",
    
    /**
     * Constant: LABEL_OUTLINE_SUFFIX
     * {String}
     */
    LABEL_OUTLINE_SUFFIX: "_outline",

    /**
     * Constructor: OpenLayers.Renderer.Elements
     * 
     * Parameters:
     * containerID - {String}
     * options - {Object} options for this renderer. 
     *
     * Supported options are:
     *     yOrdering - {Boolean} Whether to use y-ordering
     *     zIndexing - {Boolean} Whether to use z-indexing. Will be ignored
     *         if yOrdering is set to true.
     */
    initialize: function(containerID, options) {
        OpenLayers.Renderer.prototype.initialize.apply(this, arguments);

        this.rendererRoot = this.createRenderRoot();
        this.root = this.createRoot("_root");
        this.vectorRoot = this.createRoot("_vroot");
        this.textRoot = this.createRoot("_troot");
        
        this.root.appendChild(this.vectorRoot);
        this.root.appendChild(this.textRoot);
        
        this.rendererRoot.appendChild(this.root);
        this.container.appendChild(this.rendererRoot);
        
        if(options && (options.zIndexing || options.yOrdering)) {
            this.indexer = new OpenLayers.ElementsIndexer(options.yOrdering);
        }
    },
    
    /**
     * Method: destroy
     */
    destroy: function() {

        this.clear(); 

        this.rendererRoot = null;
        this.root = null;
        this.xmlns = null;

        OpenLayers.Renderer.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: clear
     * Remove all the elements from the root
     */    
    clear: function() {
        var child;
        var root = this.vectorRoot;
        if (root) {
            while (child = root.firstChild) {
                root.removeChild(child);
            }
        }
        root = this.textRoot;
        if (root) {
            while (child = root.firstChild) {
                root.removeChild(child);
            }
        }
        if (this.indexer) {
            this.indexer.clear();
        }
    },
    
    /**
     * Method: setExtent
     * Set the visible part of the layer.
     *
     * Parameters:
     * extent - {<OpenLayers.Bounds>}
     * resolutionChanged - {Boolean}
     *
     * Returns:
     * {Boolean} true to notify the layer that the new extent does not exceed
     *     the coordinate range, and the features will not need to be redrawn.
     *     False otherwise.
     */
    setExtent: function(extent, resolutionChanged) {
        var coordSysUnchanged = OpenLayers.Renderer.prototype.setExtent.apply(this, arguments);
        var resolution = this.getResolution();
        if (this.map.baseLayer && this.map.baseLayer.wrapDateLine) {
            var rightOfDateLine,
                ratio = extent.getWidth() / this.map.getExtent().getWidth(),
                extent = extent.scale(1 / ratio),
                world = this.map.getMaxExtent();
            if (world.right > extent.left && world.right < extent.right) {
                rightOfDateLine = true;
            } else if (world.left > extent.left && world.left < extent.right) {
                rightOfDateLine = false;
            }
            if (rightOfDateLine !== this.rightOfDateLine || resolutionChanged) {
                coordSysUnchanged = false;
                this.xOffset = rightOfDateLine === true ?
                    world.getWidth() / resolution : 0;
            }
            this.rightOfDateLine = rightOfDateLine;
        }
        return coordSysUnchanged;
    },

    /** 
     * Method: getNodeType
     * This function is in charge of asking the specific renderer which type
     *     of node to create for the given geometry and style. All geometries
     *     in an Elements-based renderer consist of one node and some
     *     attributes. We have the nodeFactory() function which creates a node
     *     for us, but it takes a 'type' as input, and that is precisely what
     *     this function tells us.  
     *  
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     * 
     * Returns:
     * {String} The corresponding node type for the specified geometry
     */
    getNodeType: function(geometry, style) { },

    /** 
     * Method: drawGeometry 
     * Draw the geometry, creating new nodes, setting paths, setting style,
     *     setting featureId on the node.  This method should only be called
     *     by the renderer itself.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     * featureId - {String}
     * 
     * Returns:
     * {Boolean} true if the geometry has been drawn completely; null if
     *     incomplete; false otherwise
     */
    drawGeometry: function(geometry, style, featureId) {
        var className = geometry.CLASS_NAME;
        var rendered = true;
        if ((className == "OpenLayers.Geometry.Collection") ||
            (className == "OpenLayers.Geometry.MultiPoint") ||
            (className == "OpenLayers.Geometry.MultiLineString") ||
            (className == "OpenLayers.Geometry.MultiPolygon")) {
            for (var i = 0, len=geometry.components.length; i<len; i++) {
                rendered = this.drawGeometry(
                    geometry.components[i], style, featureId) && rendered;
            }
            return rendered;
        }

        rendered = false;
        var removeBackground = false;
        if (style.display != "none") {
            if (style.backgroundGraphic) {
                this.redrawBackgroundNode(geometry.id, geometry, style,
                    featureId);
            } else {
                removeBackground = true;
            }
            rendered = this.redrawNode(geometry.id, geometry, style,
                featureId);
        }
        if (rendered == false) {
            var node = document.getElementById(geometry.id);
            if (node) {
                if (node._style.backgroundGraphic) {
                    removeBackground = true;
                }
                node.parentNode.removeChild(node);
            }
        }
        if (removeBackground) {
            var node = document.getElementById(
                geometry.id + this.BACKGROUND_ID_SUFFIX);
            if (node) {
                node.parentNode.removeChild(node);
            }
        }
        return rendered;
    },
    
    /**
     * Method: redrawNode
     * 
     * Parameters:
     * id - {String}
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     * featureId - {String}
     * 
     * Returns:
     * {Boolean} true if the complete geometry could be drawn, null if parts of
     *     the geometry could not be drawn, false otherwise
     */
    redrawNode: function(id, geometry, style, featureId) {
        style = this.applyDefaultSymbolizer(style);
        // Get the node if it's already on the map.
        var node = this.nodeFactory(id, this.getNodeType(geometry, style));
        
        // Set the data for the node, then draw it.
        node._featureId = featureId;
        node._boundsBottom = geometry.getBounds().bottom;
        node._geometryClass = geometry.CLASS_NAME;
        node._style = style;

        var drawResult = this.drawGeometryNode(node, geometry, style);
        if(drawResult === false) {
            return false;
        }
         
        node = drawResult.node;
        
        // Insert the node into the indexer so it can show us where to
        // place it. Note that this operation is O(log(n)). If there's a
        // performance problem (when dragging, for instance) this is
        // likely where it would be.
        if (this.indexer) {
            var insert = this.indexer.insert(node);
            if (insert) {
                this.vectorRoot.insertBefore(node, insert);
            } else {
                this.vectorRoot.appendChild(node);
            }
        } else {
            // if there's no indexer, simply append the node to root,
            // but only if the node is a new one
            if (node.parentNode !== this.vectorRoot){ 
                this.vectorRoot.appendChild(node);
            }
        }
        
        this.postDraw(node);
        
        return drawResult.complete;
    },
    
    /**
     * Method: redrawBackgroundNode
     * Redraws the node using special 'background' style properties. Basically
     *     just calls redrawNode(), but instead of directly using the 
     *     'externalGraphic', 'graphicXOffset', 'graphicYOffset', and 
     *     'graphicZIndex' properties directly from the specified 'style' 
     *     parameter, we create a new style object and set those properties 
     *     from the corresponding 'background'-prefixed properties from 
     *     specified 'style' parameter.
     * 
     * Parameters:
     * id - {String}
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     * featureId - {String}
     * 
     * Returns:
     * {Boolean} true if the complete geometry could be drawn, null if parts of
     *     the geometry could not be drawn, false otherwise
     */
    redrawBackgroundNode: function(id, geometry, style, featureId) {
        var backgroundStyle = OpenLayers.Util.extend({}, style);
        
        // Set regular style attributes to apply to the background styles.
        backgroundStyle.externalGraphic = backgroundStyle.backgroundGraphic;
        backgroundStyle.graphicXOffset = backgroundStyle.backgroundXOffset;
        backgroundStyle.graphicYOffset = backgroundStyle.backgroundYOffset;
        backgroundStyle.graphicZIndex = backgroundStyle.backgroundGraphicZIndex;
        backgroundStyle.graphicWidth = backgroundStyle.backgroundWidth || backgroundStyle.graphicWidth;
        backgroundStyle.graphicHeight = backgroundStyle.backgroundHeight || backgroundStyle.graphicHeight;
        
        // Erase background styles.
        backgroundStyle.backgroundGraphic = null;
        backgroundStyle.backgroundXOffset = null;
        backgroundStyle.backgroundYOffset = null;
        backgroundStyle.backgroundGraphicZIndex = null;
        
        return this.redrawNode(
            id + this.BACKGROUND_ID_SUFFIX, 
            geometry, 
            backgroundStyle, 
            null
        );
    },

    /**
     * Method: drawGeometryNode
     * Given a node, draw a geometry on the specified layer.
     *     node and geometry are required arguments, style is optional.
     *     This method is only called by the render itself.
     *
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     * 
     * Returns:
     * {Object} a hash with properties "node" (the drawn node) and "complete"
     *     (null if parts of the geometry could not be drawn, false if nothing
     *     could be drawn)
     */
    drawGeometryNode: function(node, geometry, style) {
        style = style || node._style;

        var options = {
            'isFilled': style.fill === undefined ?
                true :
                style.fill,
            'isStroked': style.stroke === undefined ?
                !!style.strokeWidth :
                style.stroke
        };
        var drawn;
        switch (geometry.CLASS_NAME) {
            case "OpenLayers.Geometry.Point":
                if(style.graphic === false) {
                    options.isFilled = false;
                    options.isStroked = false;
                }
                drawn = this.drawPoint(node, geometry);
                break;
            case "OpenLayers.Geometry.LineString":
                options.isFilled = false;
                drawn = this.drawLineString(node, geometry);
                break;
            case "OpenLayers.Geometry.LinearRing":
                drawn = this.drawLinearRing(node, geometry);
                break;
            case "OpenLayers.Geometry.Polygon":
                drawn = this.drawPolygon(node, geometry);
                break;
            case "OpenLayers.Geometry.Rectangle":
                drawn = this.drawRectangle(node, geometry);
                break;
            default:
                break;
        }

        node._options = options; 

        //set style
        //TBD simplify this
        if (drawn != false) {
            return {
                node: this.setStyle(node, style, options, geometry),
                complete: drawn
            };
        } else {
            return false;
        }
    },
    
    /**
     * Method: postDraw
     * Things that have do be done after the geometry node is appended
     *     to its parent node. To be overridden by subclasses.
     * 
     * Parameters:
     * node - {DOMElement}
     */
    postDraw: function(node) {},
    
    /**
     * Method: drawPoint
     * Virtual function for drawing Point Geometry. 
     *     Should be implemented by subclasses.
     *     This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or false if the renderer could not draw the point
     */ 
    drawPoint: function(node, geometry) {},

    /**
     * Method: drawLineString
     * Virtual function for drawing LineString Geometry. 
     *     Should be implemented by subclasses.
     *     This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or null if the renderer could not draw all components of
     *     the linestring, or false if nothing could be drawn
     */ 
    drawLineString: function(node, geometry) {},

    /**
     * Method: drawLinearRing
     * Virtual function for drawing LinearRing Geometry. 
     *     Should be implemented by subclasses.
     *     This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or null if the renderer could not draw all components
     *     of the linear ring, or false if nothing could be drawn
     */ 
    drawLinearRing: function(node, geometry) {},

    /**
     * Method: drawPolygon
     * Virtual function for drawing Polygon Geometry. 
     *    Should be implemented by subclasses.
     *    This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or null if the renderer could not draw all components
     *     of the polygon, or false if nothing could be drawn
     */ 
    drawPolygon: function(node, geometry) {},

    /**
     * Method: drawRectangle
     * Virtual function for drawing Rectangle Geometry. 
     *     Should be implemented by subclasses.
     *     This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or false if the renderer could not draw the rectangle
     */ 
    drawRectangle: function(node, geometry) {},

    /**
     * Method: drawCircle
     * Virtual function for drawing Circle Geometry. 
     *     Should be implemented by subclasses.
     *     This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or false if the renderer could not draw the circle
     */ 
    drawCircle: function(node, geometry) {},

    /**
     * Method: removeText
     * Removes a label
     * 
     * Parameters:
     * featureId - {String}
     */
    removeText: function(featureId) {
        var label = document.getElementById(featureId + this.LABEL_ID_SUFFIX);
        if (label) {
            this.textRoot.removeChild(label);
        }
        var outline = document.getElementById(featureId + this.LABEL_OUTLINE_SUFFIX);
        if (outline) {
            this.textRoot.removeChild(outline);
        }
    },

    /**
     * Method: getFeatureIdFromEvent
     * 
     * Parameters:
     * evt - {Object} An <OpenLayers.Event> object
     *
     * Returns:
     * {String} A feature id or undefined.
     */
    getFeatureIdFromEvent: function(evt) {
        var target = evt.target;
        var useElement = target && target.correspondingUseElement;
        var node = useElement ? useElement : (target || evt.srcElement);
        return node._featureId;
    },

    /** 
     * Method: eraseGeometry
     * Erase a geometry from the renderer. In the case of a multi-geometry, 
     *     we cycle through and recurse on ourselves. Otherwise, we look for a 
     *     node with the geometry.id, destroy its geometry, and remove it from
     *     the DOM.
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * featureId - {String}
     */
    eraseGeometry: function(geometry, featureId) {
        if ((geometry.CLASS_NAME == "OpenLayers.Geometry.MultiPoint") ||
            (geometry.CLASS_NAME == "OpenLayers.Geometry.MultiLineString") ||
            (geometry.CLASS_NAME == "OpenLayers.Geometry.MultiPolygon") ||
            (geometry.CLASS_NAME == "OpenLayers.Geometry.Collection")) {
            for (var i=0, len=geometry.components.length; i<len; i++) {
                this.eraseGeometry(geometry.components[i], featureId);
            }
        } else {    
            var element = OpenLayers.Util.getElement(geometry.id);
            if (element && element.parentNode) {
                if (element.geometry) {
                    element.geometry.destroy();
                    element.geometry = null;
                }
                element.parentNode.removeChild(element);

                if (this.indexer) {
                    this.indexer.remove(element);
                }
                
                if (element._style.backgroundGraphic) {
                    var backgroundId = geometry.id + this.BACKGROUND_ID_SUFFIX;
                    var bElem = OpenLayers.Util.getElement(backgroundId);
                    if (bElem && bElem.parentNode) {
                        // No need to destroy the geometry since the element and the background
                        // node share the same geometry.
                        bElem.parentNode.removeChild(bElem);
                    }
                }
            }
        }
    },

    /** 
     * Method: nodeFactory
     * Create new node of the specified type, with the (optional) specified id.
     * 
     * If node already exists with same ID and a different type, we remove it
     *     and then call ourselves again to recreate it.
     * 
     * Parameters:
     * id - {String}
     * type - {String} type Kind of node to draw.
     * 
     * Returns:
     * {DOMElement} A new node of the given type and id.
     */
    nodeFactory: function(id, type) {
        var node = OpenLayers.Util.getElement(id);
        if (node) {
            if (!this.nodeTypeCompare(node, type)) {
                node.parentNode.removeChild(node);
                node = this.nodeFactory(id, type);
            }
        } else {
            node = this.createNode(type, id);
        }
        return node;
    },
    
    /** 
     * Method: nodeTypeCompare
     * 
     * Parameters:
     * node - {DOMElement}
     * type - {String} Kind of node
     * 
     * Returns:
     * {Boolean} Whether or not the specified node is of the specified type
     *     This function must be overridden by subclasses.
     */
    nodeTypeCompare: function(node, type) {},
    
    /** 
     * Method: createNode
     * 
     * Parameters:
     * type - {String} Kind of node to draw.
     * id - {String} Id for node.
     * 
     * Returns:
     * {DOMElement} A new node of the given type and id.
     *     This function must be overridden by subclasses.
     */
    createNode: function(type, id) {},

    /**
     * Method: moveRoot
     * moves this renderer's root to a different renderer.
     * 
     * Parameters:
     * renderer - {<OpenLayers.Renderer>} target renderer for the moved root
     */
    moveRoot: function(renderer) {
        var root = this.root;
        if(renderer.root.parentNode == this.rendererRoot) {
            root = renderer.root;
        }
        root.parentNode.removeChild(root);
        renderer.rendererRoot.appendChild(root);
    },
    
    /**
     * Method: getRenderLayerId
     * Gets the layer that this renderer's output appears on. If moveRoot was
     * used, this will be different from the id of the layer containing the
     * features rendered by this renderer.
     * 
     * Returns:
     * {String} the id of the output layer.
     */
    getRenderLayerId: function() {
        return this.root.parentNode.parentNode.id;
    },
    
    /**
     * Method: isComplexSymbol
     * Determines if a symbol cannot be rendered using drawCircle
     * 
     * Parameters:
     * graphicName - {String}
     * 
     * Returns
     * {Boolean} true if the symbol is complex, false if not
     */
    isComplexSymbol: function(graphicName) {
        return (graphicName != "circle") && !!graphicName;
    },

    CLASS_NAME: "OpenLayers.Renderer.Elements"
});

/* ======================================================================
    OpenLayers/Control/ArgParser.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.ArgParser
 * The ArgParser control adds location bar query string parsing functionality 
 * to an OpenLayers Map.
 * When added to a Map control, on a page load/refresh, the Map will 
 * automatically take the href string and parse it for lon, lat, zoom, and 
 * layers information. 
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.ArgParser = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: center
     * {<OpenLayers.LonLat>}
     */
    center: null,
    
    /**
     * Property: zoom
     * {int}
     */
    zoom: null,

    /**
     * Property: layers
     * {String} Each character represents the state of the corresponding layer 
     *     on the map.
     */
    layers: null,
    
    /** 
     * APIProperty: displayProjection
     * {<OpenLayers.Projection>} Requires proj4js support. 
     *     Projection used when reading the coordinates from the URL. This will
     *     reproject the map coordinates from the URL into the map's
     *     projection.
     *
     *     If you are using this functionality, be aware that any permalink
     *     which is added to the map will determine the coordinate type which
     *     is read from the URL, which means you should not add permalinks with
     *     different displayProjections to the same map. 
     */
    displayProjection: null, 

    /**
     * Constructor: OpenLayers.Control.ArgParser
     *
     * Parameters:
     * options - {Object}
     */

    /**
     * Method: getParameters
     */    
    getParameters: function(url) {
        url = url || window.location.href;
        var parameters = OpenLayers.Util.getParameters(url);

        // If we have an anchor in the url use it to split the url
        var index = url.indexOf('#');
        if (index > 0) {
            // create an url to parse on the getParameters
            url = '?' + url.substring(index + 1, url.length);

            OpenLayers.Util.extend(parameters,
                    OpenLayers.Util.getParameters(url));
        }
        return parameters;
    },
    
    /**
     * Method: setMap
     * Set the map property for the control. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.prototype.setMap.apply(this, arguments);

        //make sure we dont already have an arg parser attached
        for(var i=0, len=this.map.controls.length; i<len; i++) {
            var control = this.map.controls[i];
            if ( (control != this) &&
                 (control.CLASS_NAME == "OpenLayers.Control.ArgParser") ) {
                
                // If a second argparser is added to the map, then we 
                // override the displayProjection to be the one added to the
                // map. 
                if (control.displayProjection != this.displayProjection) {
                    this.displayProjection = control.displayProjection;
                }    
                
                break;
            }
        }
        if (i == this.map.controls.length) {

            var args = this.getParameters();
            // Be careful to set layer first, to not trigger unnecessary layer loads
            if (args.layers) {
                this.layers = args.layers;
    
                // when we add a new layer, set its visibility 
                this.map.events.register('addlayer', this, 
                                         this.configureLayers);
                this.configureLayers();
            }
            if (args.lat && args.lon) {
                this.center = new OpenLayers.LonLat(parseFloat(args.lon),
                                                    parseFloat(args.lat));
                if (args.zoom) {
                    this.zoom = parseFloat(args.zoom);
                }
    
                // when we add a new baselayer to see when we can set the center
                this.map.events.register('changebaselayer', this, 
                                         this.setCenter);
                this.setCenter();
            }
        }
    },
   
    /** 
     * Method: setCenter
     * As soon as a baseLayer has been loaded, we center and zoom
     *   ...and remove the handler.
     */
    setCenter: function() {
        
        if (this.map.baseLayer) {
            //dont need to listen for this one anymore
            this.map.events.unregister('changebaselayer', this, 
                                       this.setCenter);
            
            if (this.displayProjection) {
                this.center.transform(this.displayProjection, 
                                      this.map.getProjectionObject()); 
            }      

            this.map.setCenter(this.center, this.zoom);
        }
    },

    /** 
     * Method: configureLayers
     * As soon as all the layers are loaded, cycle through them and 
     *   hide or show them. 
     */
    configureLayers: function() {

        if (this.layers.length == this.map.layers.length) { 
            this.map.events.unregister('addlayer', this, this.configureLayers);

            for(var i=0, len=this.layers.length; i<len; i++) {
                
                var layer = this.map.layers[i];
                var c = this.layers.charAt(i);
                
                if (c == "B") {
                    this.map.setBaseLayer(layer);
                } else if ( (c == "T") || (c == "F") ) {
                    layer.setVisibility(c == "T");
                }
            }
        }
    },     

    CLASS_NAME: "OpenLayers.Control.ArgParser"
});
/* ======================================================================
    OpenLayers/Control/Permalink.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Control/ArgParser.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Class: OpenLayers.Control.Permalink
 * The Permalink control is hyperlink that will return the user to the 
 * current map view. By default it is drawn in the lower right corner of the
 * map. The href is updated as the map is zoomed, panned and whilst layers
 * are switched.
 * 
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: argParserClass
     * {Class} The ArgParser control class (not instance) to use with this
     *     control.
     */
    argParserClass: OpenLayers.Control.ArgParser,

    /** 
     * Property: element 
     * {DOMElement}
     */
    element: null,
    
    /** 
     * APIProperty: anchor
     * {Boolean} This option changes 3 things:
     *     the character '#' is used in place of the character '?',
     *     the window.href is updated if no element is provided.
     *     When this option is set to true it's not recommend to provide
     *     a base without provide an element.
     */
    anchor: false,

    /** 
     * APIProperty: base
     * {String}
     */
    base: '',

    /** 
     * APIProperty: displayProjection
     * {<OpenLayers.Projection>} Requires proj4js support.  Projection used
     *     when creating the coordinates in the link. This will reproject the
     *     map coordinates into display coordinates. If you are using this
     *     functionality, the permalink which is last added to the map will
     *     determine the coordinate type which is read from the URL, which
     *     means you should not add permalinks with different
     *     displayProjections to the same map. 
     */
    displayProjection: null, 

    /**
     * Constructor: OpenLayers.Control.Permalink
     *
     * Parameters: 
     * element - {DOMElement} 
     * base - {String} 
     * options - {Object} options to the control.
     *
     * Or for anchor:
     * options - {Object} options to the control.
     */
    initialize: function(element, base, options) {
        if (element !== null && typeof element == 'object' && !OpenLayers.Util.isElement(element)) {
            options = element;
            this.base = document.location.href;
            OpenLayers.Control.prototype.initialize.apply(this, [options]);
            if (this.element != null) {
                this.element = OpenLayers.Util.getElement(this.element);
            }
        }
        else {
            OpenLayers.Control.prototype.initialize.apply(this, [options]);
            this.element = OpenLayers.Util.getElement(element);
            this.base = base || document.location.href;
        }
    },
    
    /**
     * APIMethod: destroy
     */
    destroy: function()  {
        if (this.element && this.element.parentNode == this.div) {
            this.div.removeChild(this.element);
            this.element = null;
        }
        if (this.map) {
            this.map.events.unregister('moveend', this, this.updateLink);
        }

        OpenLayers.Control.prototype.destroy.apply(this, arguments); 
    },

    /**
     * Method: setMap
     * Set the map property for the control. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.prototype.setMap.apply(this, arguments);

        //make sure we have an arg parser attached
        for(var i=0, len=this.map.controls.length; i<len; i++) {
            var control = this.map.controls[i];
            if (control.CLASS_NAME == this.argParserClass.CLASS_NAME) {
                
                // If a permalink is added to the map, and an ArgParser already
                // exists, we override the displayProjection to be the one
                // on the permalink. 
                if (control.displayProjection != this.displayProjection) {
                    this.displayProjection = control.displayProjection;
                }    
                
                break;
            }
        }
        if (i == this.map.controls.length) {
            this.map.addControl(new this.argParserClass(
                { 'displayProjection': this.displayProjection }));       
        }

    },

    /**
     * Method: draw
     *
     * Returns:
     * {DOMElement}
     */    
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
          
        if (!this.element && !this.anchor) {
            this.element = document.createElement("a");
            this.element.innerHTML = OpenLayers.i18n("Permalink");
            this.element.href="";
            this.div.appendChild(this.element);
        }
        this.map.events.on({
            'moveend': this.updateLink,
            'changelayer': this.updateLink,
            'changebaselayer': this.updateLink,
            scope: this
        });
        
        // Make it so there is at least a link even though the map may not have
        // moved yet.
        this.updateLink();
        
        return this.div;
    },
   
    /**
     * Method: updateLink 
     */
    updateLink: function() {
        var separator = this.anchor ? '#' : '?';
        var href = this.base;
        if (href.indexOf(separator) != -1) {
            href = href.substring( 0, href.indexOf(separator) );
        }

        href += separator + OpenLayers.Util.getParameterString(this.createParams());
        if (this.anchor && !this.element) {
            window.location.href = href;
        }
        else {
            this.element.href = href;
        }
    }, 
    
    /**
     * APIMethod: createParams
     * Creates the parameters that need to be encoded into the permalink url.
     * 
     * Parameters:
     * center - {<OpenLayers.LonLat>} center to encode in the permalink.
     *     Defaults to the current map center.
     * zoom - {Integer} zoom level to encode in the permalink. Defaults to the
     *     current map zoom level.
     * layers - {Array(<OpenLayers.Layer>)} layers to encode in the permalink.
     *     Defaults to the current map layers.
     * 
     * Returns:
     * {Object} Hash of parameters that will be url-encoded into the
     * permalink.
     */
    createParams: function(center, zoom, layers) {
        center = center || this.map.getCenter();
          
        var params = OpenLayers.Util.getParameters(this.base);
        
        // If there's still no center, map is not initialized yet. 
        // Break out of this function, and simply return the params from the
        // base link.
        if (center) { 

            //zoom
            params.zoom = zoom || this.map.getZoom(); 

            //lon,lat
            var lat = center.lat;
            var lon = center.lon;
            
            if (this.displayProjection) {
                var mapPosition = OpenLayers.Projection.transform(
                  { x: lon, y: lat }, 
                  this.map.getProjectionObject(), 
                  this.displayProjection );
                lon = mapPosition.x;  
                lat = mapPosition.y;  
            }       
            params.lat = Math.round(lat*100000)/100000;
            params.lon = Math.round(lon*100000)/100000;
    
            //layers        
            layers = layers || this.map.layers;  
            params.layers = '';
            for (var i=0, len=layers.length; i<len; i++) {
                var layer = layers[i];
    
                if (layer.isBaseLayer) {
                    params.layers += (layer == this.map.baseLayer) ? "B" : "0";
                } else {
                    params.layers += (layer.getVisibility()) ? "T" : "F";           
                }
            }
        }

        return params;
    }, 

    CLASS_NAME: "OpenLayers.Control.Permalink"
});
/* ======================================================================
    OpenLayers/Layer/TMS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.TMS
 * Create a layer for accessing tiles from services that conform with the 
 *     Tile Map Service Specification 
 *     (http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification).
 *
 * Example:
 * (code)
 *     var layer = new OpenLayers.Layer.TMS(
 *         "My Layer", // name for display in LayerSwitcher
 *         "http://tilecache.osgeo.org/wms-c/Basic.py/", // service endpoint
 *         {layername: "basic", type: "png"} // required properties
 *     );
 * (end)
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.TMS = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /**
     * APIProperty: serviceVersion
     * {String} Service version for tile requests.  Default is "1.0.0".
     */
    serviceVersion: "1.0.0",

    /**
     * APIProperty: layername
     * {String} The identifier for the <TileMap> as advertised by the service.  
     *     For example, if the service advertises a <TileMap> with 
     *    'href="http://tms.osgeo.org/1.0.0/vmap0"', the <layername> property 
     *     would be set to "vmap0".
     */
    layername: null,

    /**
     * APIProperty: type
     * {String} The format extension corresponding to the requested tile image
     *     type.  This is advertised in a <TileFormat> element as the 
     *     "extension" attribute.  For example, if the service advertises a 
     *     <TileMap> with <TileFormat width="256" height="256" mime-type="image/jpeg" extension="jpg" />,
     *     the <type> property would be set to "jpg".
     */
    type: null,

    /**
     * APIProperty: isBaseLayer
     * {Boolean} Make this layer a base layer.  Default is true.  Set false to
     *     use the layer as an overlay.
     */
    isBaseLayer: true,

    /**
     * APIProperty: tileOrigin
     * {<OpenLayers.LonLat>} Optional origin for aligning the grid of tiles.
     *     If provided, requests for tiles at all resolutions will be aligned
     *     with this location (no tiles shall overlap this location).  If
     *     not provided, the grid of tiles will be aligned with the bottom-left
     *     corner of the map's <maxExtent>.  Default is ``null``.
     *
     * Example:
     * (code)
     *     var layer = new OpenLayers.Layer.TMS(
     *         "My Layer",
     *         "http://tilecache.osgeo.org/wms-c/Basic.py/",
     *         {
     *             layername: "basic", 
     *             type: "png",
     *             // set if different than the bottom left of map.maxExtent
     *             tileOrigin: new OpenLayers.LonLat(-180, -90)
     *         }
     *     );
     * (end)
     */
    tileOrigin: null,

    /**
     * APIProperty: serverResolutions
     * {Array} A list of all resolutions available on the server.  Only set this
     *     property if the map resolutions differ from the server. This
     *     property serves two purposes. (a) <serverResolutions> can include
     *     resolutions that the server supports and that you don't want to
     *     provide with this layer; you can also look at <zoomOffset>, which is
     *     an alternative to <serverResolutions> for that specific purpose.
     *     (b) The map can work with resolutions that aren't supported by
     *     the server, i.e. that aren't in <serverResolutions>. When the
     *     map is displayed in such a resolution data for the closest
     *     server-supported resolution is loaded and the layer div is
     *     stretched as necessary.
     */
    serverResolutions: null,

    /**
     * APIProperty: zoomOffset
     * {Number} If your cache has more zoom levels than you want to provide
     *     access to with this layer, supply a zoomOffset.  This zoom offset
     *     is added to the current map zoom level to determine the level
     *     for a requested tile.  For example, if you supply a zoomOffset
     *     of 3, when the map is at the zoom 0, tiles will be requested from
     *     level 3 of your cache.  Default is 0 (assumes cache level and map
     *     zoom are equivalent).  Using <zoomOffset> is an alternative to
     *     setting <serverResolutions> if you only want to expose a subset
     *     of the server resolutions.
     */
    zoomOffset: 0,
    
    /**
     * Constructor: OpenLayers.Layer.TMS
     * 
     * Parameters:
     * name - {String} Title to be displayed in a <OpenLayers.Control.LayerSwitcher>
     * url - {String} Service endpoint (without the version number).  E.g.
     *     "http://tms.osgeo.org/".
     * options - {Object} Additional properties to be set on the layer.  The
     *     <layername> and <type> properties must be set here.
     */
    initialize: function(name, url, options) {
        var newArguments = [];
        newArguments.push(name, url, {}, options);
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
    },    

    /**
     * APIMethod: clone
     * Create a complete copy of this layer.
     *
     * Parameters:
     * obj - {Object} Should only be provided by subclasses that call this
     *     method.
     * 
     * Returns:
     * {<OpenLayers.Layer.TMS>} An exact clone of this <OpenLayers.Layer.TMS>
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.TMS(this.name,
                                           this.url,
                                           this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },    
    
    /**
     * Method: getURL
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * 
     * Returns:
     * {String} A string with the layer's url and parameters and also the 
     *          passed-in bounds and appropriate tile size specified as 
     *          parameters
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        var res = this.getServerResolution();
        var x = Math.round((bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w));
        var y = Math.round((bounds.bottom - this.tileOrigin.lat) / (res * this.tileSize.h));
        var z = this.getServerZoom();
        var path = this.serviceVersion + "/" + this.layername + "/" + z + "/" + x + "/" + y + "." + this.type; 
        var url = this.url;
        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(path, url);
        }
        return url + path;
    },

    /** 
     * Method: setMap
     * When the layer is added to a map, then we can fetch our origin 
     *    (if we don't have one.) 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
        if (!this.tileOrigin) { 
            this.tileOrigin = new OpenLayers.LonLat(this.map.maxExtent.left,
                                                this.map.maxExtent.bottom);
        }                                       
    },

    CLASS_NAME: "OpenLayers.Layer.TMS"
});
/* ======================================================================
    OpenLayers/Strategy/Fixed.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 */

/**
 * Class: OpenLayers.Strategy.Fixed
 * A simple strategy that requests features once and never requests new data.
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * APIProperty: preload
     * {Boolean} Load data before layer made visible. Enabling this may result
     *   in considerable overhead if your application loads many data layers
     *   that are not visible by default. Default is false.
     */
    preload: false,

    /**
     * Constructor: OpenLayers.Strategy.Fixed
     * Create a new Fixed strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */

    /**
     * Method: activate
     * Activate the strategy: load data or add listener to load when visible
     *
     * Returns:
     * {Boolean} True if the strategy was successfully activated or false if
     *      the strategy was already active.
     */
    activate: function() {
        if(OpenLayers.Strategy.prototype.activate.apply(this, arguments)) {
            this.layer.events.on({
                "refresh": this.load,
                scope: this
            });
            if(this.layer.visibility == true || this.preload) {
                this.load();
            } else {
                this.layer.events.on({
                    "visibilitychanged": this.load,
                    scope: this
                });
            }
            return true;
        }
        return false;
    },
    
    /**
     * Method: deactivate
     * Deactivate the strategy.  Undo what is done in <activate>.
     * 
     * Returns:
     * {Boolean} The strategy was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
        if(deactivated) {
            this.layer.events.un({
                "refresh": this.load,
                "visibilitychanged": this.load,
                scope: this
            });
        }
        return deactivated;
    },

    /**
     * Method: load
     * Tells protocol to load data and unhooks the visibilitychanged event
     *
     * Parameters:
     * options - {Object} options to pass to protocol read.
     */
    load: function(options) {
        var layer = this.layer;
        layer.events.triggerEvent("loadstart");
        layer.protocol.read(OpenLayers.Util.applyDefaults({
            callback: OpenLayers.Function.bind(this.merge, this,
                layer.map.getProjectionObject()),
            filter: layer.filter
        }, options));
        layer.events.un({
            "visibilitychanged": this.load,
            scope: this
        });
    },

    /**
     * Method: merge
     * Add all features to the layer.
     *
     * Parameters:
     * mapProjection - {<OpenLayers.Projection>} the map projection
     * resp - {Object} options to pass to protocol read.
     */
    merge: function(mapProjection, resp) {
        var layer = this.layer;
        layer.destroyFeatures();
        var features = resp.features;
        if (features && features.length > 0) {
            if(!mapProjection.equals(layer.projection)) {
                var geom;
                for(var i=0, len=features.length; i<len; ++i) {
                    geom = features[i].geometry;
                    if(geom) {
                        geom.transform(layer.projection, mapProjection);
                    }
                }
            }
            layer.addFeatures(features);
        }
        layer.events.triggerEvent("loadend");
    },

    CLASS_NAME: "OpenLayers.Strategy.Fixed"
});
/* ======================================================================
    OpenLayers/Control/Zoom.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Events/buttonclick.js
 */

/**
 * Class: OpenLayers.Control.Zoom
 * The Zoom control is a pair of +/- links for zooming in and out.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Zoom = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: zoomInText
     * {String}
     * Text for zoom-in link.  Default is "+".
     */
    zoomInText: "+",

    /**
     * APIProperty: zoomInId
     * {String}
     * Instead of having the control create a zoom in link, you can provide 
     *     the identifier for an anchor element already added to the document.
     *     By default, an element with id "olZoomInLink" will be searched for
     *     and used if it exists.
     */
    zoomInId: "olZoomInLink",

    /**
     * APIProperty: zoomOutText
     * {String}
     * Text for zoom-out link.  Default is "-".
     */
    zoomOutText: "-",

    /**
     * APIProperty: zoomOutId
     * {String}
     * Instead of having the control create a zoom out link, you can provide 
     *     the identifier for an anchor element already added to the document.
     *     By default, an element with id "olZoomOutLink" will be searched for
     *     and used if it exists.
     */
    zoomOutId: "olZoomOutLink",

    /**
     * Method: draw
     *
     * Returns:
     * {DOMElement} A reference to the DOMElement containing the zoom links.
     */
    draw: function() {
        var div = OpenLayers.Control.prototype.draw.apply(this),
            links = this.getOrCreateLinks(div),
            zoomIn = links.zoomIn,
            zoomOut = links.zoomOut,
            eventsInstance = this.map.events;
        
        if (zoomOut.parentNode !== div) {
            eventsInstance = this.events;
            eventsInstance.attachToElement(zoomOut.parentNode);
        }
        eventsInstance.register("buttonclick", this, this.onZoomClick);
        
        this.zoomInLink = zoomIn;
        this.zoomOutLink = zoomOut;
        return div;
    },
    
    /**
     * Method: getOrCreateLinks
     * 
     * Parameters:
     * el - {DOMElement}
     *
     * Return: 
     * {Object} Object with zoomIn and zoomOut properties referencing links.
     */
    getOrCreateLinks: function(el) {
        var zoomIn = document.getElementById(this.zoomInId),
            zoomOut = document.getElementById(this.zoomOutId);
        if (!zoomIn) {
            zoomIn = document.createElement("a");
            zoomIn.href = "#zoomIn";
            zoomIn.appendChild(document.createTextNode(this.zoomInText));
            zoomIn.className = "olControlZoomIn";
            el.appendChild(zoomIn);
        }
        OpenLayers.Element.addClass(zoomIn, "olButton");
        if (!zoomOut) {
            zoomOut = document.createElement("a");
            zoomOut.href = "#zoomOut";
            zoomOut.appendChild(document.createTextNode(this.zoomOutText));
            zoomOut.className = "olControlZoomOut";
            el.appendChild(zoomOut);
        }
        OpenLayers.Element.addClass(zoomOut, "olButton");
        return {
            zoomIn: zoomIn, zoomOut: zoomOut
        };
    },
    
    /**
     * Method: onZoomClick
     * Called when zoomin/out link is clicked.
     */
    onZoomClick: function(evt) {
        var button = evt.buttonElement;
        if (button === this.zoomInLink) {
            this.map.zoomIn();
        } else if (button === this.zoomOutLink) {
            this.map.zoomOut();
        }
    },

    /** 
     * Method: destroy
     * Clean up.
     */
    destroy: function() {
        if (this.map) {
            this.map.events.unregister("buttonclick", this, this.onZoomClick);
        }
        delete this.zoomInLink;
        delete this.zoomOutLink;
        OpenLayers.Control.prototype.destroy.apply(this);
    },

    CLASS_NAME: "OpenLayers.Control.Zoom"
});
/* ======================================================================
    OpenLayers/Layer/PointTrack.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Vector.js
 */

/**
 * Class: OpenLayers.Layer.PointTrack
 * Vector layer to display ordered point features as a line, creating one
 * LineString feature for each pair of two points.
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Vector> 
 */
OpenLayers.Layer.PointTrack = OpenLayers.Class(OpenLayers.Layer.Vector, {
  
    /**
     * APIProperty: dataFrom
     *     {<OpenLayers.Layer.PointTrack.TARGET_NODE>} or
     *     {<OpenLayers.Layer.PointTrack.SOURCE_NODE>} optional. If the lines
     *     should get the data/attributes from one of the two points it is
     *     composed of, which one should it be?
     */
    dataFrom: null,
    
    /**
     * APIProperty: styleFrom
     *     {<OpenLayers.Layer.PointTrack.TARGET_NODE>} or
     *     {<OpenLayers.Layer.PointTrack.SOURCE_NODE>} optional. If the lines
     *     should get the style from one of the two points it is composed of,
     *     which one should it be?
     */
    styleFrom: null,
    
    /**
     * Constructor: OpenLayers.PointTrack
     * Constructor for a new OpenLayers.PointTrack instance.
     *
     * Parameters:
     * name     - {String} name of the layer
     * options  - {Object} Optional object with properties to tag onto the
     *            instance.
     */    
        
    /**
     * APIMethod: addNodes
     * Adds point features that will be used to create lines from, using point
     * pairs. The first point of a pair will be the source node, the second
     * will be the target node.
     * 
     * Parameters:
     * pointFeatures - {Array(<OpenLayers.Feature>)}
     * options - {Object}
     * 
     * Supported options:
     * silent - {Boolean} true to suppress (before)feature(s)added events
     */
    addNodes: function(pointFeatures, options) {
        if (pointFeatures.length < 2) {
            throw new Error("At least two point features have to be added to " +
                            "create a line from");
        }
        
        var lines = new Array(pointFeatures.length-1);
        
        var pointFeature, startPoint, endPoint;
        for(var i=0, len=pointFeatures.length; i<len; i++) {
            pointFeature = pointFeatures[i];
            endPoint = pointFeature.geometry;
            
            if (!endPoint) {
              var lonlat = pointFeature.lonlat;
              endPoint = new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat);
            } else if(endPoint.CLASS_NAME != "OpenLayers.Geometry.Point") {
                throw new TypeError("Only features with point geometries are supported.");
            }
            
            if(i > 0) {
                var attributes = (this.dataFrom != null) ?
                        (pointFeatures[i+this.dataFrom].data ||
                                pointFeatures[i+this.dataFrom].attributes) :
                        null;
                var style = (this.styleFrom != null) ?
                        (pointFeatures[i+this.styleFrom].style) :
                        null;
                var line = new OpenLayers.Geometry.LineString([startPoint,
                        endPoint]);
                        
                lines[i-1] = new OpenLayers.Feature.Vector(line, attributes,
                    style);
            }
            
            startPoint = endPoint;
        }

        this.addFeatures(lines, options);
    },
    
    CLASS_NAME: "OpenLayers.Layer.PointTrack"
});

/**
 * Constant: OpenLayers.Layer.PointTrack.SOURCE_NODE
 * {Number} value for <OpenLayers.Layer.PointTrack.dataFrom> and
 * <OpenLayers.Layer.PointTrack.styleFrom>
 */
OpenLayers.Layer.PointTrack.SOURCE_NODE = -1;

/**
 * Constant: OpenLayers.Layer.PointTrack.TARGET_NODE
 * {Number} value for <OpenLayers.Layer.PointTrack.dataFrom> and
 * <OpenLayers.Layer.PointTrack.styleFrom>
 */
OpenLayers.Layer.PointTrack.TARGET_NODE = 0;

/**
 * Constant: OpenLayers.Layer.PointTrack.dataFrom
 * {Object} with the following keys - *deprecated*
 * - SOURCE_NODE: take data/attributes from the source node of the line
 * - TARGET_NODE: take data/attributes from the target node of the line
 */
OpenLayers.Layer.PointTrack.dataFrom = {'SOURCE_NODE': -1, 'TARGET_NODE': 0};
/* ======================================================================
    OpenLayers/Protocol/WFS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol.js
 */

/**
 * Class: OpenLayers.Protocol.WFS
 * Used to create a versioned WFS protocol.  Default version is 1.0.0.
 *
 * Returns:
 * {<OpenLayers.Protocol>} A WFS protocol of the given version.
 *
 * Example:
 * (code)
 *     var protocol = new OpenLayers.Protocol.WFS({
 *         version: "1.1.0",
 *         url:  "http://demo.opengeo.org/geoserver/wfs",
 *         featureType: "tasmania_roads",
 *         featureNS: "http://www.openplans.org/topp",
 *         geometryName: "the_geom"
 *     });
 * (end)
 *
 * See the protocols for specific WFS versions for more detail.
 */
OpenLayers.Protocol.WFS = function(options) {
    options = OpenLayers.Util.applyDefaults(
        options, OpenLayers.Protocol.WFS.DEFAULTS
    );
    var cls = OpenLayers.Protocol.WFS["v"+options.version.replace(/\./g, "_")];
    if(!cls) {
        throw "Unsupported WFS version: " + options.version;
    }
    return new cls(options);
};

/**
 * Function: fromWMSLayer
 * Convenience function to create a WFS protocol from a WMS layer.  This makes
 *     the assumption that a WFS requests can be issued at the same URL as
 *     WMS requests and that a WFS featureType exists with the same name as the
 *     WMS layer.
 *     
 * This function is designed to auto-configure <url>, <featureType>,
 *     <featurePrefix> and <srsName> for WFS <version> 1.1.0. Note that
 *     srsName matching with the WMS layer will not work with WFS 1.0.0.
 * 
 * Parameters:
 * layer - {<OpenLayers.Layer.WMS>} WMS layer that has a matching WFS
 *     FeatureType at the same server url with the same typename.
 * options - {Object} Default properties to be set on the protocol.
 *
 * Returns:
 * {<OpenLayers.Protocol.WFS>}
 */
OpenLayers.Protocol.WFS.fromWMSLayer = function(layer, options) {
    var typeName, featurePrefix;
    var param = layer.params["LAYERS"];
    var parts = (OpenLayers.Util.isArray(param) ? param[0] : param).split(":");
    if(parts.length > 1) {
        featurePrefix = parts[0];
    }
    typeName = parts.pop();
    var protocolOptions = {
        url: layer.url,
        featureType: typeName,
        featurePrefix: featurePrefix,
        srsName: layer.projection && layer.projection.getCode() ||
                 layer.map && layer.map.getProjectionObject().getCode(),
        version: "1.1.0"
    };
    return new OpenLayers.Protocol.WFS(OpenLayers.Util.applyDefaults(
        options, protocolOptions
    ));
};

/**
 * Constant: OpenLayers.Protocol.WFS.DEFAULTS
 */
OpenLayers.Protocol.WFS.DEFAULTS = {
    "version": "1.0.0"
};
/* ======================================================================
    OpenLayers/Layer/Markers.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer.js
 */

/**
 * Class: OpenLayers.Layer.Markers
 * 
 * Inherits from:
 *  - <OpenLayers.Layer> 
 */
OpenLayers.Layer.Markers = OpenLayers.Class(OpenLayers.Layer, {
    
    /** 
     * APIProperty: isBaseLayer 
     * {Boolean} Markers layer is never a base layer.  
     */
    isBaseLayer: false,
    
    /** 
     * APIProperty: markers 
     * {Array(<OpenLayers.Marker>)} internal marker list 
     */
    markers: null,


    /** 
     * Property: drawn 
     * {Boolean} internal state of drawing. This is a workaround for the fact
     * that the map does not call moveTo with a zoomChanged when the map is
     * first starting up. This lets us catch the case where we have *never*
     * drawn the layer, and draw it even if the zoom hasn't changed.
     */
    drawn: false,
    
    /**
     * Constructor: OpenLayers.Layer.Markers 
     * Create a Markers layer.
     *
     * Parameters:
     * name - {String} 
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, options) {
        OpenLayers.Layer.prototype.initialize.apply(this, arguments);
        this.markers = [];
    },
    
    /**
     * APIMethod: destroy 
     */
    destroy: function() {
        this.clearMarkers();
        this.markers = null;
        OpenLayers.Layer.prototype.destroy.apply(this, arguments);
    },

    /**
     * APIMethod: setOpacity
     * Sets the opacity for all the markers.
     * 
     * Parameters:
     * opacity - {Float}
     */
    setOpacity: function(opacity) {
        if (opacity != this.opacity) {
            this.opacity = opacity;
            for (var i=0, len=this.markers.length; i<len; i++) {
                this.markers[i].setOpacity(this.opacity);
            }
        }
    },

    /** 
     * Method: moveTo
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     * zoomChanged - {Boolean} 
     * dragging - {Boolean} 
     */
    moveTo:function(bounds, zoomChanged, dragging) {
        OpenLayers.Layer.prototype.moveTo.apply(this, arguments);

        if (zoomChanged || !this.drawn) {
            for(var i=0, len=this.markers.length; i<len; i++) {
                this.drawMarker(this.markers[i]);
            }
            this.drawn = true;
        }
    },

    /**
     * APIMethod: addMarker
     *
     * Parameters:
     * marker - {<OpenLayers.Marker>} 
     */
    addMarker: function(marker) {
        this.markers.push(marker);

        if (this.opacity < 1) {
            marker.setOpacity(this.opacity);
        }

        if (this.map && this.map.getExtent()) {
            marker.map = this.map;
            this.drawMarker(marker);
        }
    },

    /**
     * APIMethod: removeMarker
     *
     * Parameters:
     * marker - {<OpenLayers.Marker>} 
     */
    removeMarker: function(marker) {
        if (this.markers && this.markers.length) {
            OpenLayers.Util.removeItem(this.markers, marker);
            marker.erase();
        }
    },

    /**
     * Method: clearMarkers
     * This method removes all markers from a layer. The markers are not
     * destroyed by this function, but are removed from the list of markers.
     */
    clearMarkers: function() {
        if (this.markers != null) {
            while(this.markers.length > 0) {
                this.removeMarker(this.markers[0]);
            }
        }
    },

    /** 
     * Method: drawMarker
     * Calculate the pixel location for the marker, create it, and 
     *    add it to the layer's div
     *
     * Parameters:
     * marker - {<OpenLayers.Marker>} 
     */
    drawMarker: function(marker) {
        var px = this.map.getLayerPxFromLonLat(marker.lonlat);
        if (px == null) {
            marker.display(false);
        } else {
            if (!marker.isDrawn()) {
                var markerImg = marker.draw(px);
                this.div.appendChild(markerImg);
            } else if(marker.icon) {
                marker.icon.moveTo(px);
            }
        }
    },
    
    /** 
     * APIMethod: getDataExtent
     * Calculates the max extent which includes all of the markers.
     * 
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getDataExtent: function () {
        var maxExtent = null;
        
        if ( this.markers && (this.markers.length > 0)) {
            var maxExtent = new OpenLayers.Bounds();
            for(var i=0, len=this.markers.length; i<len; i++) {
                var marker = this.markers[i];
                maxExtent.extend(marker.lonlat);
            }
        }

        return maxExtent;
    },

    CLASS_NAME: "OpenLayers.Layer.Markers"
});
/* ======================================================================
    OpenLayers/Control/Pan.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.Pan
 * The Pan control is a single button to pan the map in one direction. For
 * a more complete control see <OpenLayers.Control.PanPanel>.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Pan = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: slideFactor
     * {Integer} Number of pixels by which we'll pan the map in any direction 
     *     on clicking the arrow buttons, defaults to 50.  If you want to pan
     *     by some ratio of the map dimensions, use <slideRatio> instead.
     */
    slideFactor: 50,

    /** 
     * APIProperty: slideRatio
     * {Number} The fraction of map width/height by which we'll pan the map            
     *     on clicking the arrow buttons.  Default is null.  If set, will
     *     override <slideFactor>. E.g. if slideRatio is .5, then Pan Up will
     *     pan up half the map height. 
     */
    slideRatio: null,

    /** 
     * Property: direction
     * {String} in {'North', 'South', 'East', 'West'}
     */
    direction: null,

    /**
     * Property: type
     * {String} The type of <OpenLayers.Control> -- When added to a 
     *     <Control.Panel>, 'type' is used by the panel to determine how to 
     *     handle our events.
     */
    type: OpenLayers.Control.TYPE_BUTTON,

    /**
     * Constructor: OpenLayers.Control.Pan 
     * Control which handles the panning (in any of the cardinal directions)
     *     of the map by a set px distance. 
     *
     * Parameters:
     * direction - {String} The direction this button should pan.
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(direction, options) {
    
        this.direction = direction;
        this.CLASS_NAME += this.direction;
        
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
    },
    
    /**
     * Method: trigger
     */
    trigger: function(){
    
        var getSlideFactor = OpenLayers.Function.bind(function (dim) {
            return this.slideRatio ?
                this.map.getSize()[dim] * this.slideRatio :
                this.slideFactor;
        }, this);

        switch (this.direction) {
            case OpenLayers.Control.Pan.NORTH: 
                this.map.pan(0, -getSlideFactor("h"));
                break;
            case OpenLayers.Control.Pan.SOUTH: 
                this.map.pan(0, getSlideFactor("h"));
                break;
            case OpenLayers.Control.Pan.WEST: 
                this.map.pan(-getSlideFactor("w"), 0);
                break;
            case OpenLayers.Control.Pan.EAST: 
                this.map.pan(getSlideFactor("w"), 0);
                break;
        }
    },

    CLASS_NAME: "OpenLayers.Control.Pan"
});

OpenLayers.Control.Pan.NORTH = "North";
OpenLayers.Control.Pan.SOUTH = "South";
OpenLayers.Control.Pan.EAST = "East";
OpenLayers.Control.Pan.WEST = "West";
/* ======================================================================
    OpenLayers/Format/CSWGetDomain.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format.js
 */

/**
 * Class: OpenLayers.Format.CSWGetDomain
 * Default version is 2.0.2.
 *
 * Returns:
 * {<OpenLayers.Format>} A CSWGetDomain format of the given version.
 */
OpenLayers.Format.CSWGetDomain = function(options) {
    options = OpenLayers.Util.applyDefaults(
        options, OpenLayers.Format.CSWGetDomain.DEFAULTS
    );
    var cls = OpenLayers.Format.CSWGetDomain["v"+options.version.replace(/\./g, "_")];
    if(!cls) {
        throw "Unsupported CSWGetDomain version: " + options.version;
    }
    return new cls(options);
};

/**
 * Constant: DEFAULTS
 * {Object} Default properties for the CSWGetDomain format.
 */
OpenLayers.Format.CSWGetDomain.DEFAULTS = {
    "version": "2.0.2"
};
/* ======================================================================
    OpenLayers/Format/CSWGetDomain/v2_0_2.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/CSWGetDomain.js
 */

/**
 * Class: OpenLayers.Format.CSWGetDomain.v2_0_2
 *     A format for creating CSWGetDomain v2.0.2 transactions. 
 *     Create a new instance with the
 *     <OpenLayers.Format.CSWGetDomain.v2_0_2> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.CSWGetDomain.v2_0_2 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance",
        csw: "http://www.opengis.net/cat/csw/2.0.2"
    },

    /**
     * Property: defaultPrefix
     * {String} The default prefix (used by Format.XML).
     */
    defaultPrefix: "csw",
    
    /**
     * Property: version
     * {String} CSW version number.
     */
    version: "2.0.2",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/cat/csw/2.0.2
     *   http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd
     */
    schemaLocation: "http://www.opengis.net/cat/csw/2.0.2 http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd",

    /**
     * APIProperty: PropertyName
     * {String} Value of the csw:PropertyName element, used when
     *     writing a GetDomain document.
     */
    PropertyName: null,

    /**
     * APIProperty: ParameterName
     * {String} Value of the csw:ParameterName element, used when
     *     writing a GetDomain document.
     */
    ParameterName: null,
    
    /**
     * Constructor: OpenLayers.Format.CSWGetDomain.v2_0_2
     * A class for parsing and generating CSWGetDomain v2.0.2 transactions.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * - PropertyName
     * - ParameterName
     */

    /**
     * APIMethod: read
     * Parse the response from a GetDomain request.
     */
    read: function(data) {
        if(typeof data == "string") { 
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var obj = {};
        this.readNode(data, obj);
        return obj;
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "csw": {
            "GetDomainResponse": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "DomainValues": function(node, obj) {
                if (!(OpenLayers.Util.isArray(obj.DomainValues))) {
                    obj.DomainValues = [];
                }
                var attrs = node.attributes;
                var domainValue = {};
                for(var i=0, len=attrs.length; i<len; ++i) {
                    domainValue[attrs[i].name] = attrs[i].nodeValue;
                }
                this.readChildNodes(node, domainValue);
                obj.DomainValues.push(domainValue);
            },
            "PropertyName": function(node, obj) {
                obj.PropertyName = this.getChildValue(node);
            },
            "ParameterName": function(node, obj) {
                obj.ParameterName = this.getChildValue(node);
            },
            "ListOfValues": function(node, obj) {
                if (!(OpenLayers.Util.isArray(obj.ListOfValues))) {
                    obj.ListOfValues = [];
                }
                this.readChildNodes(node, obj.ListOfValues);
            },
            "Value": function(node, obj) {
                var attrs = node.attributes;
                var value = {};
                for(var i=0, len=attrs.length; i<len; ++i) {
                    value[attrs[i].name] = attrs[i].nodeValue;
                }
                value.value = this.getChildValue(node);
                obj.push({Value: value});
            },
            "ConceptualScheme": function(node, obj) {
                obj.ConceptualScheme = {};
                this.readChildNodes(node, obj.ConceptualScheme);
            },
            "Name": function(node, obj) {
                obj.Name = this.getChildValue(node);
            },
            "Document": function(node, obj) {
                obj.Document = this.getChildValue(node);
            },
            "Authority": function(node, obj) {
                obj.Authority = this.getChildValue(node);
            },
            "RangeOfValues": function(node, obj) {
                obj.RangeOfValues = {};
                this.readChildNodes(node, obj.RangeOfValues);
            },
            "MinValue": function(node, obj) {
                var attrs = node.attributes;
                var value = {};
                for(var i=0, len=attrs.length; i<len; ++i) {
                    value[attrs[i].name] = attrs[i].nodeValue;
                }
                value.value = this.getChildValue(node);
                obj.MinValue = value;
            },
            "MaxValue": function(node, obj) {
                var attrs = node.attributes;
                var value = {};
                for(var i=0, len=attrs.length; i<len; ++i) {
                    value[attrs[i].name] = attrs[i].nodeValue;
                }
                value.value = this.getChildValue(node);
                obj.MaxValue = value;
            }
        }
    },
    
    /**
     * APIMethod: write
     * Given an configuration js object, write a CSWGetDomain request. 
     *
     * Parameters:
     * options - {Object} A object mapping the request.
     *
     * Returns:
     * {String} A serialized CSWGetDomain request.
     */
    write: function(options) {
        var node = this.writeNode("csw:GetDomain", options);
        return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "csw": {
            "GetDomain": function(options) {
                var node = this.createElementNSPlus("csw:GetDomain", {
                    attributes: {
                        service: "CSW",
                        version: this.version
                    }
                });
                if (options.PropertyName || this.PropertyName) {
                    this.writeNode(
                        "csw:PropertyName",
                        options.PropertyName || this.PropertyName,
                        node
                    );
                } else if (options.ParameterName || this.ParameterName) {
                    this.writeNode(
                        "csw:ParameterName",
                        options.ParameterName || this.ParameterName,
                        node
                    );
                }
                this.readChildNodes(node, options);
                return node;
            },
            "PropertyName": function(value) {
                var node = this.createElementNSPlus("csw:PropertyName", {
                    value: value
                });
                return node;
            },
            "ParameterName": function(value) {
                var node = this.createElementNSPlus("csw:ParameterName", {
                    value: value
                });
                return node;
            }
        }
    },
   
    CLASS_NAME: "OpenLayers.Format.CSWGetDomain.v2_0_2" 
});
/* ======================================================================
    OpenLayers/Format/ArcXML/Features.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/ArcXML.js
 */

/**
 * Class: OpenLayers.Format.ArcXML.Features
 * Read/Wite ArcXML features. Create a new instance with the 
 *     <OpenLayers.Format.ArcXML.Features> constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.ArcXML.Features = OpenLayers.Class(OpenLayers.Format.XML, {

    /**
     * Constructor: OpenLayers.Format.ArcXML.Features
     * Create a new parser/writer for ArcXML Features.  Create an instance of this class
     * to get a set of features from an ArcXML response.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * APIMethod: read
     * Read data from a string of ArcXML, and return a set of OpenLayers features. 
     * 
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} A collection of features.
     */
    read: function(data) {
        var axl = new OpenLayers.Format.ArcXML();
        var parsed = axl.read(data);
        
        return parsed.features.feature;
    }
});
/* ======================================================================
    OpenLayers/Control/Snapping.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Layer/Vector.js
 */

/**
 * Class: OpenLayers.Control.Snapping
 * Acts as a snapping agent while editing vector features.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Snapping = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforesnap - Triggered before a snap occurs.  Listeners receive an
     *     event object with *point*, *x*, *y*, *distance*, *layer*, and
     *     *snapType* properties.  The point property will be original point
     *     geometry considered for snapping. The x and y properties represent
     *     coordinates the point will receive. The distance is the distance
     *     of the snap.  The layer is the target layer.  The snapType property
     *     will be one of "node", "vertex", or "edge". Return false to stop
     *     snapping from occurring.
     * snap - Triggered when a snap occurs.  Listeners receive an event with
     *     *point*, *snapType*, *layer*, and *distance* properties.  The point
     *     will be the location snapped to.  The snapType will be one of "node",
     *     "vertex", or "edge".  The layer will be the target layer.  The
     *     distance will be the distance of the snap in map units.
     * unsnap - Triggered when a vertex is unsnapped.  Listeners receive an
     *     event with a *point* property.
     */
    
    /**
     * CONSTANT: DEFAULTS
     * Default target properties.
     */
    DEFAULTS: {
        tolerance: 10,
        node: true,
        edge: true,
        vertex: true
    },
    
    /**
     * Property: greedy
     * {Boolean} Snap to closest feature in first layer with an eligible
     *     feature.  Default is true.
     */
    greedy: true,
    
    /**
     * Property: precedence
     * {Array} List representing precedence of different snapping types.
     *     Default is "node", "vertex", "edge".
     */
    precedence: ["node", "vertex", "edge"],
    
    /**
     * Property: resolution
     * {Float} The map resolution for the previously considered snap.
     */
    resolution: null,
    
    /**
     * Property: geoToleranceCache
     * {Object} A cache of geo-tolerances.  Tolerance values (in map units) are
     *     calculated when the map resolution changes.
     */
    geoToleranceCache: null,
    
    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>} The current editable layer.  Set at
     *     construction or after construction with <setLayer>.
     */
    layer: null,
    
    /**
     * Property: feature
     * {<OpenLayers.Feature.Vector>} The current editable feature.
     */
    feature: null,
    
    /**
     * Property: point
     * {<OpenLayers.Geometry.Point>} The currently snapped vertex.
     */
    point: null,

    /**
     * Constructor: OpenLayers.Control.Snapping
     * Creates a new snapping control. A control is constructed with an editable
     *     layer and a set of configuration objects for target layers. While the
     *     control is active, dragging vertices while drawing new features or
     *     modifying existing features on the editable layer will engage
     *     snapping to features on the target layers. Whether a vertex snaps to
     *     a feature on a target layer depends on the target layer configuration.
     *
     * Parameters:
     * options - {Object} An object containing all configuration properties for
     *     the control.
     *
     * Valid options:
     * layer - {<OpenLayers.Layer.Vector>} The editable layer.  Features from this
     *     layer that are digitized or modified may have vertices snapped to
     *     features from any of the target layers.
     * targets - {Array(Object | OpenLayers.Layer.Vector)} A list of objects for
     *     configuring target layers.  See valid properties of the target
     *     objects below.  If the items in the targets list are vector layers
     *     (instead of configuration objects), the defaults from the <defaults>
     *     property will apply.  The editable layer itself may be a target
     *     layer - allowing newly created or edited features to be snapped to
     *     existing features from the same layer.  If no targets are provided
     *     the layer given in the constructor (as <layer>) will become the
     *     initial target.
     * defaults - {Object} An object with default properties to be applied
     *     to all target objects.
     * greedy - {Boolean} Snap to closest feature in first target layer that
     *     applies.  Default is true.  If false, all features in all target
     *     layers will be checked and the closest feature in all target layers
     *     will be chosen.  The greedy property determines if the order of the
     *     target layers is significant.  By default, the order of the target
     *     layers is significant where layers earlier in the target layer list
     *     have precedence over layers later in the list.  Within a single
     *     layer, the closest feature is always chosen for snapping.  This
     *     property only determines whether the search for a closer feature
     *     continues after an eligible feature is found in a target layer.
     *
     * Valid target properties:
     * layer - {<OpenLayers.Layer.Vector>} A target layer.  Features from this
     *     layer will be eligible to act as snapping target for the editable
     *     layer.
     * tolerance - {Float} The distance (in pixels) at which snapping may occur.
     *     Default is 10.
     * node - {Boolean} Snap to nodes (first or last point in a geometry) in
     *     target layer.  Default is true.
     * nodeTolerance - {Float} Optional distance at which snapping may occur
     *     for nodes specifically.  If none is provided, <tolerance> will be
     *     used.
     * vertex - {Boolean} Snap to vertices in target layer.  Default is true.
     * vertexTolerance - {Float} Optional distance at which snapping may occur
     *     for vertices specifically.  If none is provided, <tolerance> will be
     *     used.
     * edge - {Boolean} Snap to edges in target layer.  Default is true.
     * edgeTolerance - {Float} Optional distance at which snapping may occur
     *     for edges specifically.  If none is provided, <tolerance> will be
     *     used.
     * filter - {<OpenLayers.Filter>} Optional filter to evaluate to determine if
     *     feature is eligible for snapping.  If filter evaluates to true for a
     *     target feature a vertex may be snapped to the feature. 
     * minResolution - {Number} If a minResolution is provided, snapping to this
     *     target will only be considered if the map resolution is greater than
     *     or equal to this value (the minResolution is inclusive).  Default is
     *     no minimum resolution limit.
     * maxResolution - {Number} If a maxResolution is provided, snapping to this
     *     target will only be considered if the map resolution is strictly
     *     less than this value (the maxResolution is exclusive).  Default is
     *     no maximum resolution limit.
     */
    initialize: function(options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.options = options || {}; // TODO: this could be done by the super
        
        // set the editable layer if provided
        if(this.options.layer) {
            this.setLayer(this.options.layer);
        }
        // configure target layers
        var defaults = OpenLayers.Util.extend({}, this.options.defaults);
        this.defaults = OpenLayers.Util.applyDefaults(defaults, this.DEFAULTS);
        this.setTargets(this.options.targets);
        if(this.targets.length === 0 && this.layer) {
            this.addTargetLayer(this.layer);
        }

        this.geoToleranceCache = {};
    },
    
    /**
     * APIMethod: setLayer
     * Set the editable layer.  Call the setLayer method if the editable layer
     *     changes and the same control should be used on a new editable layer.
     *     If the control is already active, it will be active after the new
     *     layer is set.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>}  The new editable layer.
     */
    setLayer: function(layer) {
        if(this.active) {
            this.deactivate();
            this.layer = layer;
            this.activate();
        } else {
            this.layer = layer;
        }
    },
    
    /**
     * Method: setTargets
     * Set the targets for the snapping agent.
     *
     * Parameters:
     * targets - {Array} An array of target configs or target layers.
     */
    setTargets: function(targets) {
        this.targets = [];
        if(targets && targets.length) {
            var target;
            for(var i=0, len=targets.length; i<len; ++i) {
                target = targets[i];
                if(target instanceof OpenLayers.Layer.Vector) {
                    this.addTargetLayer(target);
                } else {
                    this.addTarget(target);
                }
            }
        }
    },
    
    /**
     * Method: addTargetLayer
     * Add a target layer with the default target config.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} A target layer.
     */
    addTargetLayer: function(layer) {
        this.addTarget({layer: layer});
    },
    
    /**
     * Method: addTarget
     * Add a configured target layer.
     *
     * Parameters:
     * target - {Object} A target config.
     */
    addTarget: function(target) {
        target = OpenLayers.Util.applyDefaults(target, this.defaults);
        target.nodeTolerance = target.nodeTolerance || target.tolerance;
        target.vertexTolerance = target.vertexTolerance || target.tolerance;
        target.edgeTolerance = target.edgeTolerance || target.tolerance;
        this.targets.push(target);
    },
    
    /**
     * Method: removeTargetLayer
     * Remove a target layer.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} The target layer to remove.
     */
    removeTargetLayer: function(layer) {
        var target;
        for(var i=this.targets.length-1; i>=0; --i) {
            target = this.targets[i];
            if(target.layer === layer) {
                this.removeTarget(target);
            }
        }
    },
    
    /**
     * Method: removeTarget
     * Remove a target.
     *
     * Parameters:
     * target - {Object} A target config.
     *
     * Returns:
     * {Array} The targets array.
     */
    removeTarget: function(target) {
        return OpenLayers.Util.removeItem(this.targets, target);
    },
    
    /**
     * APIMethod: activate
     * Activate the control.  Activating the control registers listeners for
     *     editing related events so that during feature creation and
     *     modification, moving vertices will trigger snapping.
     */
    activate: function() {
        var activated = OpenLayers.Control.prototype.activate.call(this);
        if(activated) {
            if(this.layer && this.layer.events) {
                this.layer.events.on({
                    sketchstarted: this.onSketchModified,
                    sketchmodified: this.onSketchModified,
                    vertexmodified: this.onVertexModified,
                    scope: this
                });
            }
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the control.  Deactivating the control unregisters listeners
     *     so feature editing may proceed without engaging the snapping agent.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Control.prototype.deactivate.call(this);
        if(deactivated) {
            if(this.layer && this.layer.events) {
                this.layer.events.un({
                    sketchstarted: this.onSketchModified,
                    sketchmodified: this.onSketchModified,
                    vertexmodified: this.onVertexModified,
                    scope: this
                });
            }
        }
        this.feature = null;
        this.point = null;
        return deactivated;
    },
    
    /**
     * Method: onSketchModified
     * Registered as a listener for the sketchmodified event on the editable
     *     layer.
     *
     * Parameters:
     * event - {Object} The sketch modified event.
     */
    onSketchModified: function(event) {
        this.feature = event.feature;
        this.considerSnapping(event.vertex, event.vertex);
    },
    
    /**
     * Method: onVertexModified
     * Registered as a listener for the vertexmodified event on the editable
     *     layer.
     *
     * Parameters:
     * event - {Object} The vertex modified event.
     */
    onVertexModified: function(event) {
        this.feature = event.feature;
        var loc = this.layer.map.getLonLatFromViewPortPx(event.pixel);
        this.considerSnapping(
            event.vertex, new OpenLayers.Geometry.Point(loc.lon, loc.lat)
        );
    },

    /**
     * Method: considerSnapping
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>} The vertex to be snapped (or
     *     unsnapped).
     * loc - {<OpenLayers.Geometry.Point>} The location of the mouse in map
     *     coords.
     */
    considerSnapping: function(point, loc) {
        var best = {
            rank: Number.POSITIVE_INFINITY,
            dist: Number.POSITIVE_INFINITY,
            x: null, y: null
        };
        var snapped = false;
        var result, target;
        for(var i=0, len=this.targets.length; i<len; ++i) {
            target = this.targets[i];
            result = this.testTarget(target, loc);
            if(result) {
                if(this.greedy) {
                    best = result;
                    best.target = target; 
                    snapped = true;
                    break;
                } else {
                    if((result.rank < best.rank) ||
                       (result.rank === best.rank && result.dist < best.dist)) {
                        best = result;
                        best.target = target;
                        snapped = true;
                    }
                }
            }
        }
        if(snapped) {
            var proceed = this.events.triggerEvent("beforesnap", {
                point: point, x: best.x, y: best.y, distance: best.dist,
                layer: best.target.layer, snapType: this.precedence[best.rank]
            });
            if(proceed !== false) {
                point.x = best.x;
                point.y = best.y;
                this.point = point;
                this.events.triggerEvent("snap", {
                    point: point,
                    snapType: this.precedence[best.rank],
                    layer: best.target.layer,
                    distance: best.dist
                });
            } else {
                snapped = false;
            }
        }
        if(this.point && !snapped) {
            point.x = loc.x;
            point.y = loc.y;
            this.point = null;
            this.events.triggerEvent("unsnap", {point: point});
        }
    },
    
    /**
     * Method: testTarget
     *
     * Parameters:
     * target - {Object} Object with target layer configuration.
     * loc - {<OpenLayers.Geometry.Point>} The location of the mouse in map
     *     coords.
     *
     * Returns:
     * {Object} A result object with rank, dist, x, and y properties.
     *     Returns null if candidate is not eligible for snapping.
     */
    testTarget: function(target, loc) {
        var resolution = this.layer.map.getResolution();
        if ("minResolution" in target) {
            if (resolution < target.minResolution) {
                return null;
            }
        }
        if ("maxResolution" in target) {
            if (resolution >= target.maxResolution) {
                return null;
            }
        }
        var tolerance = {
            node: this.getGeoTolerance(target.nodeTolerance, resolution),
            vertex: this.getGeoTolerance(target.vertexTolerance, resolution),
            edge: this.getGeoTolerance(target.edgeTolerance, resolution)
        };
        // this could be cached if we don't support setting tolerance values directly
        var maxTolerance = Math.max(
            tolerance.node, tolerance.vertex, tolerance.edge
        );
        var result = {
            rank: Number.POSITIVE_INFINITY, dist: Number.POSITIVE_INFINITY
        };
        var eligible = false;
        var features = target.layer.features;
        var feature, type, vertices, vertex, closest, dist, found;
        var numTypes = this.precedence.length;
        var ll = new OpenLayers.LonLat(loc.x, loc.y);
        for(var i=0, len=features.length; i<len; ++i) {
            feature = features[i];
            if(feature !== this.feature && !feature._sketch &&
               feature.state !== OpenLayers.State.DELETE &&
               (!target.filter || target.filter.evaluate(feature))) {
                if(feature.atPoint(ll, maxTolerance, maxTolerance)) {
                    for(var j=0, stop=Math.min(result.rank+1, numTypes); j<stop; ++j) {
                        type = this.precedence[j];
                        if(target[type]) {
                            if(type === "edge") {
                                closest = feature.geometry.distanceTo(loc, {details: true});
                                dist = closest.distance;
                                if(dist <= tolerance[type] && dist < result.dist) {
                                    result = {
                                        rank: j, dist: dist,
                                        x: closest.x0, y: closest.y0 // closest coords on feature
                                    };
                                    eligible = true;
                                    // don't look for lower precedence types for this feature
                                    break;
                                }
                            } else {
                                // look for nodes or vertices
                                vertices = feature.geometry.getVertices(type === "node");
                                found = false;
                                for(var k=0, klen=vertices.length; k<klen; ++k) {
                                    vertex = vertices[k];
                                    dist = vertex.distanceTo(loc);
                                    if(dist <= tolerance[type] &&
                                       (j < result.rank || (j === result.rank && dist < result.dist))) {
                                        result = {
                                            rank: j, dist: dist,
                                            x: vertex.x, y: vertex.y
                                        };
                                        eligible = true;
                                        found = true;
                                    }
                                }
                                if(found) {
                                    // don't look for lower precedence types for this feature
                                    break;
                                }
                            }
                        }
                    }
                }
            }
        }
        return eligible ? result : null;
    },
    
    /**
     * Method: getGeoTolerance
     * Calculate a tolerance in map units given a tolerance in pixels.  This
     *     takes advantage of the <geoToleranceCache> when the map resolution
     *     has not changed.
     *     
     * Parameters:
     * tolerance - {Number} A tolerance value in pixels.
     * resolution - {Number} Map resolution.
     *
     * Returns:
     * {Number} A tolerance value in map units.
     */
    getGeoTolerance: function(tolerance, resolution) {
        if(resolution !== this.resolution) {
            this.resolution = resolution;
            this.geoToleranceCache = {};
        }
        var geoTolerance = this.geoToleranceCache[tolerance];
        if(geoTolerance === undefined) {
            geoTolerance = tolerance * resolution;
            this.geoToleranceCache[tolerance] = geoTolerance;
        }
        return geoTolerance;
    },
    
    /**
     * Method: destroy
     * Clean up the control.
     */
    destroy: function() {
        if(this.active) {
            this.deactivate(); // TODO: this should be handled by the super
        }
        delete this.layer;
        delete this.targets;
        OpenLayers.Control.prototype.destroy.call(this);
    },

    CLASS_NAME: "OpenLayers.Control.Snapping"
});
/* ======================================================================
    OpenLayers/BaseTypes/Date.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/SingleFile.js
 */

/**
 * Namespace: OpenLayers.Date
 * Contains implementations of Date.parse and date.toISOString that match the
 *     ECMAScript 5 specification for parsing RFC 3339 dates.
 *     http://tools.ietf.org/html/rfc3339
 */
OpenLayers.Date = {

    /**
     * APIMethod: toISOString
     * Generates a string representing a date.  The format of the string follows
     *     the profile of ISO 8601 for date and time on the Internet (see
     *     http://tools.ietf.org/html/rfc3339).  If the toISOString method is
     *     available on the Date prototype, that is used.  The toISOString
     *     method for Date instances is defined in ECMA-262.
     *
     * Parameters:
     * date - {Date} A date object.
     *
     * Returns:
     * {String} A string representing the date (e.g.
     *     "2010-08-07T16:58:23.123Z").  If the date does not have a valid time
     *     (i.e. isNaN(date.getTime())) this method returns the string "Invalid
     *     Date".  The ECMA standard says the toISOString method should throw
     *     RangeError in this case, but Firefox returns a string instead.  For
     *     best results, use isNaN(date.getTime()) to determine date validity
     *     before generating date strings.
     */
    toISOString: (function() {
        if ("toISOString" in Date.prototype) {
            return function(date) {
                return date.toISOString();
            };
        } else {
            function pad(num, len) {
                var str = num + "";
                while (str.length < len) {
                    str = "0" + str;
                }
                return str;
            }
            return function(date) {
                var str;
                if (isNaN(date.getTime())) {
                    // ECMA-262 says throw RangeError, Firefox returns
                    // "Invalid Date"
                    str = "Invalid Date";
                } else {
                    str =
                        date.getUTCFullYear() + "-" +
                        pad(date.getUTCMonth() + 1, 2) + "-" +
                        pad(date.getUTCDate(), 2) + "T" +
                        pad(date.getUTCHours(), 2) + ":" +
                        pad(date.getUTCMinutes(), 2) + ":" +
                        pad(date.getUTCSeconds(), 2) + "." +
                        pad(date.getUTCMilliseconds(), 3) + "Z";
                }
                return str;
            };
        }

    })(),

    /**
     * APIMethod: parse
     * Generate a date object from a string.  The format for the string follows
     *     the profile of ISO 8601 for date and time on the Internet (see
     *     http://tools.ietf.org/html/rfc3339).  We don't call the native
     *     Date.parse because of inconsistency between implmentations.  In
     *     Chrome, calling Date.parse with a string that doesn't contain any
     *     indication of the timezone (e.g. "2011"), the date is interpreted
     *     in local time.  On Firefox, the assumption is UTC.
     *
     * Parameters:
     * str - {String} A string representing the date (e.g.
     *     "2010", "2010-08", "2010-08-07", "2010-08-07T16:58:23.123Z",
     *     "2010-08-07T11:58:23.123-06").
     *
     * Returns:
     * {Date} A date object.  If the string could not be parsed, an invalid
     *     date is returned (i.e. isNaN(date.getTime())).
     */
    parse: function(str) {
        var date;
        var match = str.match(/^(?:(\d{4})(?:-(\d{2})(?:-(\d{2}))?)?)?(?:(?:T(\d{1,2}):(\d{2}):(\d{2}(?:\.\d+)?)(Z|(?:[+-]\d{1,2}(?::(\d{2}))?)))|Z)?$/);
        if (match && (match[1] || match[7])) { // must have at least year or time
            var year = parseInt(match[1], 10) || 0;
            var month = (parseInt(match[2], 10) - 1) || 0;
            var day = parseInt(match[3], 10) || 1;
            date = new Date(Date.UTC(year, month, day));
            // optional time
            var type = match[7];
            if (type) {
                var hours = parseInt(match[4], 10);
                var minutes = parseInt(match[5], 10);
                var secFrac = parseFloat(match[6]);
                var seconds = secFrac | 0;
                var milliseconds = Math.round(1000 * (secFrac - seconds));
                date.setUTCHours(hours, minutes, seconds, milliseconds);
                // check offset
                if (type !== "Z") {
                    var hoursOffset = parseInt(type, 10);
                    var minutesOffset = parseInt(match[8], 10) || 0;
                    var offset = -1000 * (60 * (hoursOffset * 60) + minutesOffset * 60);
                    date = new Date(date.getTime() + offset);
                }
            }
        } else {
            date = new Date("invalid");
        }
        return date;
    }
};
/* ======================================================================
    OpenLayers/Request/XMLHttpRequest.js
   ====================================================================== */

// XMLHttpRequest.js Copyright (C) 2010 Sergey Ilinsky (http://www.ilinsky.com)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @requires OpenLayers/Request.js
 */

(function () {

    // Save reference to earlier defined object implementation (if any)
    var oXMLHttpRequest    = window.XMLHttpRequest;

    // Define on browser type
    var bGecko    = !!window.controllers,
        bIE        = window.document.all && !window.opera,
        bIE7    = bIE && window.navigator.userAgent.match(/MSIE 7.0/);

    // Enables "XMLHttpRequest()" call next to "new XMLHttpReques()"
    function fXMLHttpRequest() {
        this._object    = oXMLHttpRequest && !bIE7 ? new oXMLHttpRequest : new window.ActiveXObject("Microsoft.XMLHTTP");
        this._listeners    = [];
    };

    // Constructor
    function cXMLHttpRequest() {
        return new fXMLHttpRequest;
    };
    cXMLHttpRequest.prototype    = fXMLHttpRequest.prototype;

    // BUGFIX: Firefox with Firebug installed would break pages if not executed
    if (bGecko && oXMLHttpRequest.wrapped)
        cXMLHttpRequest.wrapped    = oXMLHttpRequest.wrapped;

    // Constants
    cXMLHttpRequest.UNSENT                = 0;
    cXMLHttpRequest.OPENED                = 1;
    cXMLHttpRequest.HEADERS_RECEIVED    = 2;
    cXMLHttpRequest.LOADING                = 3;
    cXMLHttpRequest.DONE                = 4;

    // Public Properties
    cXMLHttpRequest.prototype.readyState    = cXMLHttpRequest.UNSENT;
    cXMLHttpRequest.prototype.responseText    = '';
    cXMLHttpRequest.prototype.responseXML    = null;
    cXMLHttpRequest.prototype.status        = 0;
    cXMLHttpRequest.prototype.statusText    = '';

    // Priority proposal
    cXMLHttpRequest.prototype.priority        = "NORMAL";

    // Instance-level Events Handlers
    cXMLHttpRequest.prototype.onreadystatechange    = null;

    // Class-level Events Handlers
    cXMLHttpRequest.onreadystatechange    = null;
    cXMLHttpRequest.onopen                = null;
    cXMLHttpRequest.onsend                = null;
    cXMLHttpRequest.onabort                = null;

    // Public Methods
    cXMLHttpRequest.prototype.open    = function(sMethod, sUrl, bAsync, sUser, sPassword) {
        // Delete headers, required when object is reused
        delete this._headers;

        // When bAsync parameter value is omitted, use true as default
        if (arguments.length < 3)
            bAsync    = true;

        // Save async parameter for fixing Gecko bug with missing readystatechange in synchronous requests
        this._async        = bAsync;

        // Set the onreadystatechange handler
        var oRequest    = this,
            nState        = this.readyState,
            fOnUnload;

        // BUGFIX: IE - memory leak on page unload (inter-page leak)
        if (bIE && bAsync) {
            fOnUnload = function() {
                if (nState != cXMLHttpRequest.DONE) {
                    fCleanTransport(oRequest);
                    // Safe to abort here since onreadystatechange handler removed
                    oRequest.abort();
                }
            };
            window.attachEvent("onunload", fOnUnload);
        }

        // Add method sniffer
        if (cXMLHttpRequest.onopen)
            cXMLHttpRequest.onopen.apply(this, arguments);

        if (arguments.length > 4)
            this._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
        else
        if (arguments.length > 3)
            this._object.open(sMethod, sUrl, bAsync, sUser);
        else
            this._object.open(sMethod, sUrl, bAsync);

        this.readyState    = cXMLHttpRequest.OPENED;
        fReadyStateChange(this);

        this._object.onreadystatechange    = function() {
            if (bGecko && !bAsync)
                return;

            // Synchronize state
            oRequest.readyState        = oRequest._object.readyState;

            //
            fSynchronizeValues(oRequest);

            // BUGFIX: Firefox fires unnecessary DONE when aborting
            if (oRequest._aborted) {
                // Reset readyState to UNSENT
                oRequest.readyState    = cXMLHttpRequest.UNSENT;

                // Return now
                return;
            }

            if (oRequest.readyState == cXMLHttpRequest.DONE) {
                // Free up queue
                delete oRequest._data;
/*                if (bAsync)
                    fQueue_remove(oRequest);*/
                //
                fCleanTransport(oRequest);
// Uncomment this block if you need a fix for IE cache
/*
                // BUGFIX: IE - cache issue
                if (!oRequest._object.getResponseHeader("Date")) {
                    // Save object to cache
                    oRequest._cached    = oRequest._object;

                    // Instantiate a new transport object
                    cXMLHttpRequest.call(oRequest);

                    // Re-send request
                    if (sUser) {
                         if (sPassword)
                            oRequest._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
                        else
                            oRequest._object.open(sMethod, sUrl, bAsync, sUser);
                    }
                    else
                        oRequest._object.open(sMethod, sUrl, bAsync);
                    oRequest._object.setRequestHeader("If-Modified-Since", oRequest._cached.getResponseHeader("Last-Modified") || new window.Date(0));
                    // Copy headers set
                    if (oRequest._headers)
                        for (var sHeader in oRequest._headers)
                            if (typeof oRequest._headers[sHeader] == "string")    // Some frameworks prototype objects with functions
                                oRequest._object.setRequestHeader(sHeader, oRequest._headers[sHeader]);

                    oRequest._object.onreadystatechange    = function() {
                        // Synchronize state
                        oRequest.readyState        = oRequest._object.readyState;

                        if (oRequest._aborted) {
                            //
                            oRequest.readyState    = cXMLHttpRequest.UNSENT;

                            // Return
                            return;
                        }

                        if (oRequest.readyState == cXMLHttpRequest.DONE) {
                            // Clean Object
                            fCleanTransport(oRequest);

                            // get cached request
                            if (oRequest.status == 304)
                                oRequest._object    = oRequest._cached;

                            //
                            delete oRequest._cached;

                            //
                            fSynchronizeValues(oRequest);

                            //
                            fReadyStateChange(oRequest);

                            // BUGFIX: IE - memory leak in interrupted
                            if (bIE && bAsync)
                                window.detachEvent("onunload", fOnUnload);
                        }
                    };
                    oRequest._object.send(null);

                    // Return now - wait until re-sent request is finished
                    return;
                };
*/
                // BUGFIX: IE - memory leak in interrupted
                if (bIE && bAsync)
                    window.detachEvent("onunload", fOnUnload);
            }

            // BUGFIX: Some browsers (Internet Explorer, Gecko) fire OPEN readystate twice
            if (nState != oRequest.readyState)
                fReadyStateChange(oRequest);

            nState    = oRequest.readyState;
        }
    };
    function fXMLHttpRequest_send(oRequest) {
        oRequest._object.send(oRequest._data);

        // BUGFIX: Gecko - missing readystatechange calls in synchronous requests
        if (bGecko && !oRequest._async) {
            oRequest.readyState    = cXMLHttpRequest.OPENED;

            // Synchronize state
            fSynchronizeValues(oRequest);

            // Simulate missing states
            while (oRequest.readyState < cXMLHttpRequest.DONE) {
                oRequest.readyState++;
                fReadyStateChange(oRequest);
                // Check if we are aborted
                if (oRequest._aborted)
                    return;
            }
        }
    };
    cXMLHttpRequest.prototype.send    = function(vData) {
        // Add method sniffer
        if (cXMLHttpRequest.onsend)
            cXMLHttpRequest.onsend.apply(this, arguments);

        if (!arguments.length)
            vData    = null;

        // BUGFIX: Safari - fails sending documents created/modified dynamically, so an explicit serialization required
        // BUGFIX: IE - rewrites any custom mime-type to "text/xml" in case an XMLNode is sent
        // BUGFIX: Gecko - fails sending Element (this is up to the implementation either to standard)
        if (vData && vData.nodeType) {
            vData    = window.XMLSerializer ? new window.XMLSerializer().serializeToString(vData) : vData.xml;
            if (!this._headers["Content-Type"])
                this._object.setRequestHeader("Content-Type", "application/xml");
        }

        this._data    = vData;
/*
        // Add to queue
        if (this._async)
            fQueue_add(this);
        else*/
            fXMLHttpRequest_send(this);
    };
    cXMLHttpRequest.prototype.abort    = function() {
        // Add method sniffer
        if (cXMLHttpRequest.onabort)
            cXMLHttpRequest.onabort.apply(this, arguments);

        // BUGFIX: Gecko - unnecessary DONE when aborting
        if (this.readyState > cXMLHttpRequest.UNSENT)
            this._aborted    = true;

        this._object.abort();

        // BUGFIX: IE - memory leak
        fCleanTransport(this);

        this.readyState    = cXMLHttpRequest.UNSENT;

        delete this._data;
/*        if (this._async)
            fQueue_remove(this);*/
    };
    cXMLHttpRequest.prototype.getAllResponseHeaders    = function() {
        return this._object.getAllResponseHeaders();
    };
    cXMLHttpRequest.prototype.getResponseHeader    = function(sName) {
        return this._object.getResponseHeader(sName);
    };
    cXMLHttpRequest.prototype.setRequestHeader    = function(sName, sValue) {
        // BUGFIX: IE - cache issue
        if (!this._headers)
            this._headers    = {};
        this._headers[sName]    = sValue;

        return this._object.setRequestHeader(sName, sValue);
    };

    // EventTarget interface implementation
    cXMLHttpRequest.prototype.addEventListener    = function(sName, fHandler, bUseCapture) {
        for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++)
            if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture)
                return;
        // Add listener
        this._listeners.push([sName, fHandler, bUseCapture]);
    };

    cXMLHttpRequest.prototype.removeEventListener    = function(sName, fHandler, bUseCapture) {
        for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++)
            if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture)
                break;
        // Remove listener
        if (oListener)
            this._listeners.splice(nIndex, 1);
    };

    cXMLHttpRequest.prototype.dispatchEvent    = function(oEvent) {
        var oEventPseudo    = {
            'type':            oEvent.type,
            'target':        this,
            'currentTarget':this,
            'eventPhase':    2,
            'bubbles':        oEvent.bubbles,
            'cancelable':    oEvent.cancelable,
            'timeStamp':    oEvent.timeStamp,
            'stopPropagation':    function() {},    // There is no flow
            'preventDefault':    function() {},    // There is no default action
            'initEvent':        function() {}    // Original event object should be initialized
        };

        // Execute onreadystatechange
        if (oEventPseudo.type == "readystatechange" && this.onreadystatechange)
            (this.onreadystatechange.handleEvent || this.onreadystatechange).apply(this, [oEventPseudo]);

        // Execute listeners
        for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++)
            if (oListener[0] == oEventPseudo.type && !oListener[2])
                (oListener[1].handleEvent || oListener[1]).apply(this, [oEventPseudo]);
    };

    //
    cXMLHttpRequest.prototype.toString    = function() {
        return '[' + "object" + ' ' + "XMLHttpRequest" + ']';
    };

    cXMLHttpRequest.toString    = function() {
        return '[' + "XMLHttpRequest" + ']';
    };

    // Helper function
    function fReadyStateChange(oRequest) {
        // Sniffing code
        if (cXMLHttpRequest.onreadystatechange)
            cXMLHttpRequest.onreadystatechange.apply(oRequest);

        // Fake event
        oRequest.dispatchEvent({
            'type':            "readystatechange",
            'bubbles':        false,
            'cancelable':    false,
            'timeStamp':    new Date + 0
        });
    };

    function fGetDocument(oRequest) {
        var oDocument    = oRequest.responseXML,
            sResponse    = oRequest.responseText;
        // Try parsing responseText
        if (bIE && sResponse && oDocument && !oDocument.documentElement && oRequest.getResponseHeader("Content-Type").match(/[^\/]+\/[^\+]+\+xml/)) {
            oDocument    = new window.ActiveXObject("Microsoft.XMLDOM");
            oDocument.async                = false;
            oDocument.validateOnParse    = false;
            oDocument.loadXML(sResponse);
        }
        // Check if there is no error in document
        if (oDocument)
            if ((bIE && oDocument.parseError != 0) || !oDocument.documentElement || (oDocument.documentElement && oDocument.documentElement.tagName == "parsererror"))
                return null;
        return oDocument;
    };

    function fSynchronizeValues(oRequest) {
        try {    oRequest.responseText    = oRequest._object.responseText;    } catch (e) {}
        try {    oRequest.responseXML    = fGetDocument(oRequest._object);    } catch (e) {}
        try {    oRequest.status            = oRequest._object.status;            } catch (e) {}
        try {    oRequest.statusText        = oRequest._object.statusText;        } catch (e) {}
    };

    function fCleanTransport(oRequest) {
        // BUGFIX: IE - memory leak (on-page leak)
        oRequest._object.onreadystatechange    = new window.Function;
    };
/*
    // Queue manager
    var oQueuePending    = {"CRITICAL":[],"HIGH":[],"NORMAL":[],"LOW":[],"LOWEST":[]},
        aQueueRunning    = [];
    function fQueue_add(oRequest) {
        oQueuePending[oRequest.priority in oQueuePending ? oRequest.priority : "NORMAL"].push(oRequest);
        //
        setTimeout(fQueue_process);
    };

    function fQueue_remove(oRequest) {
        for (var nIndex = 0, bFound    = false; nIndex < aQueueRunning.length; nIndex++)
            if (bFound)
                aQueueRunning[nIndex - 1]    = aQueueRunning[nIndex];
            else
            if (aQueueRunning[nIndex] == oRequest)
                bFound    = true;
        if (bFound)
            aQueueRunning.length--;
        //
        setTimeout(fQueue_process);
    };

    function fQueue_process() {
        if (aQueueRunning.length < 6) {
            for (var sPriority in oQueuePending) {
                if (oQueuePending[sPriority].length) {
                    var oRequest    = oQueuePending[sPriority][0];
                    oQueuePending[sPriority]    = oQueuePending[sPriority].slice(1);
                    //
                    aQueueRunning.push(oRequest);
                    // Send request
                    fXMLHttpRequest_send(oRequest);
                    break;
                }
            }
        }
    };
*/
    // Internet Explorer 5.0 (missing apply)
    if (!window.Function.prototype.apply) {
        window.Function.prototype.apply    = function(oRequest, oArguments) {
            if (!oArguments)
                oArguments    = [];
            oRequest.__func    = this;
            oRequest.__func(oArguments[0], oArguments[1], oArguments[2], oArguments[3], oArguments[4]);
            delete oRequest.__func;
        };
    };

    // Register new object with window
    /**
     * Class: OpenLayers.Request.XMLHttpRequest
     * Standard-compliant (W3C) cross-browser implementation of the
     *     XMLHttpRequest object.  From
     *     http://code.google.com/p/xmlhttprequest/.
     */
    OpenLayers.Request.XMLHttpRequest = cXMLHttpRequest;
})();
/* ======================================================================
    OpenLayers/Format/KML.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Date.js
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Geometry/Polygon.js
 * @requires OpenLayers/Geometry/Collection.js
 * @requires OpenLayers/Request/XMLHttpRequest.js
 * @requires OpenLayers/Projection.js
 */

/**
 * Class: OpenLayers.Format.KML
 * Read/Write KML. Create a new instance with the <OpenLayers.Format.KML>
 *     constructor. 
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.KML = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        kml: "http://www.opengis.net/kml/2.2",
        gx: "http://www.google.com/kml/ext/2.2"
    },

    /**
     * APIProperty: kmlns
     * {String} KML Namespace to use. Defaults to 2.0 namespace.
     */
    kmlns: "http://earth.google.com/kml/2.0",
    
    /** 
     * APIProperty: placemarksDesc
     * {String} Name of the placemarks.  Default is "No description available".
     */
    placemarksDesc: "No description available",
    
    /** 
     * APIProperty: foldersName
     * {String} Name of the folders.  Default is "OpenLayers export".
     *          If set to null, no name element will be created.
     */
    foldersName: "OpenLayers export",
    
    /** 
     * APIProperty: foldersDesc
     * {String} Description of the folders. Default is "Exported on [date]."
     *          If set to null, no description element will be created.
     */
    foldersDesc: "Exported on " + new Date(),
    
    /**
     * APIProperty: extractAttributes
     * {Boolean} Extract attributes from KML.  Default is true.
     *           Extracting styleUrls requires this to be set to true
     *           Note that currently only Data and SimpleData 
     *           elements are handled.
     */
    extractAttributes: true,
    
    /**
     * APIProperty: kvpAttributes
     * {Boolean} Only used if extractAttributes is true.
     *           If set to true, attributes will be simple
     *           key-value pairs, compatible with other formats,
     *           Any displayName elements will be ignored.
     *           If set to false, attributes will be objects,
     *           retaining any displayName elements, but not
     *           compatible with other formats. Any CDATA in
     *           displayName will be read in as a string value.
     *           Default is false.
     */
    kvpAttributes: false,
    
    /**
     * Property: extractStyles
     * {Boolean} Extract styles from KML.  Default is false.
     *           Extracting styleUrls also requires extractAttributes to be
     *           set to true
     */
    extractStyles: false,
    
    /**
     * APIProperty: extractTracks
     * {Boolean} Extract gx:Track elements from Placemark elements.  Default
     *     is false.  If true, features will be generated for all points in
     *     all gx:Track elements.  Features will have a when (Date) attribute
     *     based on when elements in the track.  If tracks include angle
     *     elements, features will have heading, tilt, and roll attributes.
     *     If track point coordinates have three values, features will have
     *     an altitude attribute with the third coordinate value.
     */
    extractTracks: false,
    
    /**
     * APIProperty: trackAttributes
     * {Array} If <extractTracks> is true, points within gx:Track elements will 
     *     be parsed as features with when, heading, tilt, and roll attributes.
     *     Any additional attribute names can be provided in <trackAttributes>.
     */
    trackAttributes: null,
    
    /**
     * Property: internalns
     * {String} KML Namespace to use -- defaults to the namespace of the
     *     Placemark node being parsed, but falls back to kmlns. 
     */
    internalns: null,

    /**
     * Property: features
     * {Array} Array of features
     *     
     */
    features: null,

    /**
     * Property: styles
     * {Object} Storage of style objects
     *     
     */
    styles: null,
    
    /**
     * Property: styleBaseUrl
     * {String}
     */
    styleBaseUrl: "",

    /**
     * Property: fetched
     * {Object} Storage of KML URLs that have been fetched before
     *     in order to prevent reloading them.
     */
    fetched: null,

    /**
     * APIProperty: maxDepth
     * {Integer} Maximum depth for recursive loading external KML URLs 
     *           Defaults to 0: do no external fetching
     */
    maxDepth: 0,

    /**
     * Constructor: OpenLayers.Format.KML
     * Create a new parser for KML.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        // compile regular expressions once instead of every time they are used
        this.regExes = {
            trimSpace: (/^\s*|\s*$/g),
            removeSpace: (/\s*/g),
            splitSpace: (/\s+/),
            trimComma: (/\s*,\s*/g),
            kmlColor: (/(\w{2})(\w{2})(\w{2})(\w{2})/),
            kmlIconPalette: (/root:\/\/icons\/palette-(\d+)(\.\w+)/),
            straightBracket: (/\$\[(.*?)\]/g)
        };
        // KML coordinates are always in longlat WGS84
        this.externalProjection = new OpenLayers.Projection("EPSG:4326");

        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },

    /**
     * APIMethod: read
     * Read data from a string, and return a list of features. 
     * 
     * Parameters: 
     * data    - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} List of features.
     */
    read: function(data) {
        this.features = [];
        this.styles   = {};
        this.fetched  = {};

        // Set default options 
        var options = {
            depth: 0,
            styleBaseUrl: this.styleBaseUrl
        };

        return this.parseData(data, options);
    },

    /**
     * Method: parseData
     * Read data from a string, and return a list of features. 
     * 
     * Parameters: 
     * data    - {String} or {DOMElement} data to read/parse.
     * options - {Object} Hash of options
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} List of features.
     */
    parseData: function(data, options) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }

        // Loop throught the following node types in this order and
        // process the nodes found 
        var types = ["Link", "NetworkLink", "Style", "StyleMap", "Placemark"];
        for(var i=0, len=types.length; i<len; ++i) {
            var type = types[i];

            var nodes = this.getElementsByTagNameNS(data, "*", type);

            // skip to next type if no nodes are found
            if(nodes.length == 0) { 
                continue;
            }

            switch (type.toLowerCase()) {

                // Fetch external links 
                case "link":
                case "networklink":
                    this.parseLinks(nodes, options);
                    break;

                // parse style information
                case "style":
                    if (this.extractStyles) {
                        this.parseStyles(nodes, options);
                    }
                    break;
                case "stylemap":
                    if (this.extractStyles) {
                        this.parseStyleMaps(nodes, options);
                    }
                    break;

                // parse features
                case "placemark":
                    this.parseFeatures(nodes, options);
                    break;
            }
        }
        
        return this.features;
    },

    /**
     * Method: parseLinks
     * Finds URLs of linked KML documents and fetches them
     * 
     * Parameters: 
     * nodes   - {Array} of {DOMElement} data to read/parse.
     * options - {Object} Hash of options
     * 
     */
    parseLinks: function(nodes, options) {
        
        // Fetch external links <NetworkLink> and <Link>
        // Don't do anything if we have reached our maximum depth for recursion
        if (options.depth >= this.maxDepth) {
            return false;
        }

        // increase depth
        var newOptions = OpenLayers.Util.extend({}, options);
        newOptions.depth++;

        for(var i=0, len=nodes.length; i<len; i++) {
            var href = this.parseProperty(nodes[i], "*", "href");
            if(href && !this.fetched[href]) {
                this.fetched[href] = true; // prevent reloading the same urls
                var data = this.fetchLink(href);
                if (data) {
                    this.parseData(data, newOptions);
                }
            } 
        }

    },

    /**
     * Method: fetchLink
     * Fetches a URL and returns the result
     * 
     * Parameters: 
     * href  - {String} url to be fetched
     * 
     */
    fetchLink: function(href) {
        var request = OpenLayers.Request.GET({url: href, async: false});
        if (request) {
            return request.responseText;
        }
    },

    /**
     * Method: parseStyles
     * Looks for <Style> nodes in the data and parses them
     * Also parses <StyleMap> nodes, but only uses the 'normal' key
     * 
     * Parameters: 
     * nodes    - {Array} of {DOMElement} data to read/parse.
     * options  - {Object} Hash of options
     * 
     */
    parseStyles: function(nodes, options) {
        for(var i=0, len=nodes.length; i<len; i++) {
            var style = this.parseStyle(nodes[i]);
            if(style) {
                var styleName = (options.styleBaseUrl || "") + "#" + style.id;
                
                this.styles[styleName] = style;
            }
        }
    },

    /**
     * Method: parseKmlColor
     * Parses a kml color (in 'aabbggrr' format) and returns the corresponding 
     * color and opacity or null if the color is invalid.
     *
     * Parameters: 
     * kmlColor - {String} a kml formated color
     *
     * Returns:
     * {Object}
     */
    parseKmlColor: function(kmlColor) {
        var color = null;
        if (kmlColor) {
            var matches = kmlColor.match(this.regExes.kmlColor);
            if (matches) {
                color = {
                    color: '#' + matches[4] + matches[3] + matches[2],
                    opacity: parseInt(matches[1], 16) / 255
                };
            }
        }
        return color;
    },

    /**
     * Method: parseStyle
     * Parses the children of a <Style> node and builds the style hash
     * accordingly
     * 
     * Parameters: 
     * node - {DOMElement} <Style> node
     * 
     */
    parseStyle: function(node) {
        var style = {};
        
        var types = ["LineStyle", "PolyStyle", "IconStyle", "BalloonStyle", 
                     "LabelStyle"];
        var type, styleTypeNode, nodeList, geometry, parser;
        for(var i=0, len=types.length; i<len; ++i) {
            type = types[i];
            styleTypeNode = this.getElementsByTagNameNS(node, "*", type)[0];
            if(!styleTypeNode) { 
                continue;
            }

            // only deal with first geometry of this type
            switch (type.toLowerCase()) {
                case "linestyle":
                    var kmlColor = this.parseProperty(styleTypeNode, "*", "color");
                    var color = this.parseKmlColor(kmlColor);
                    if (color) {
                        style["strokeColor"] = color.color;
                        style["strokeOpacity"] = color.opacity;
                    }
                    
                    var width = this.parseProperty(styleTypeNode, "*", "width");
                    if (width) {
                        style["strokeWidth"] = width;
                    }
                    break;

                case "polystyle":
                    var kmlColor = this.parseProperty(styleTypeNode, "*", "color");
                    var color = this.parseKmlColor(kmlColor);
                    if (color) {
                        style["fillOpacity"] = color.opacity;
                        style["fillColor"] = color.color;
                    }
                    // Check if fill is disabled
                    var fill = this.parseProperty(styleTypeNode, "*", "fill");
                    if (fill == "0") {
                        style["fillColor"] = "none";
                    }
                    // Check if outline is disabled
                    var outline = this.parseProperty(styleTypeNode, "*", "outline");
                    if (outline == "0") {
                        style["strokeWidth"] = "0";
                    }
                   
                    break;

                case "iconstyle":
                    // set scale
                    var scale = parseFloat(this.parseProperty(styleTypeNode, 
                                                          "*", "scale") || 1);
  
                    // set default width and height of icon
                    var width = 32 * scale;
                    var height = 32 * scale;

                    var iconNode = this.getElementsByTagNameNS(styleTypeNode, 
                                               "*", 
                                               "Icon")[0];
                    if (iconNode) {
                        var href = this.parseProperty(iconNode, "*", "href");
                        if (href) {                                                   

                            var w = this.parseProperty(iconNode, "*", "w");
                            var h = this.parseProperty(iconNode, "*", "h");

                            // Settings for Google specific icons that are 64x64
                            // We set the width and height to 64 and halve the
                            // scale to prevent icons from being too big
                            var google = "http://maps.google.com/mapfiles/kml";
                            if (OpenLayers.String.startsWith(
                                                 href, google) && !w && !h) {
                                w = 64;
                                h = 64;
                                scale = scale / 2;
                            }
                                
                            // if only dimension is defined, make sure the
                            // other one has the same value
                            w = w || h;
                            h = h || w;

                            if (w) {
                                width = parseInt(w) * scale;
                            }

                            if (h) {
                                height = parseInt(h) * scale;
                            }

                            // support for internal icons 
                            //    (/root://icons/palette-x.png)
                            // x and y tell the position on the palette:
                            // - in pixels
                            // - starting from the left bottom
                            // We translate that to a position in the list 
                            // and request the appropriate icon from the 
                            // google maps website
                            var matches = href.match(this.regExes.kmlIconPalette);
                            if (matches)  {
                                var palette = matches[1];
                                var file_extension = matches[2];

                                var x = this.parseProperty(iconNode, "*", "x");
                                var y = this.parseProperty(iconNode, "*", "y");

                                var posX = x ? x/32 : 0;
                                var posY = y ? (7 - y/32) : 7;

                                var pos = posY * 8 + posX;
                                href = "http://maps.google.com/mapfiles/kml/pal" 
                                     + palette + "/icon" + pos + file_extension;
                            }

                            style["graphicOpacity"] = 1; // fully opaque
                            style["externalGraphic"] = href;
                        }

                    }


                    // hotSpots define the offset for an Icon
                    var hotSpotNode = this.getElementsByTagNameNS(styleTypeNode, 
                                               "*", 
                                               "hotSpot")[0];
                    if (hotSpotNode) {
                        var x = parseFloat(hotSpotNode.getAttribute("x"));
                        var y = parseFloat(hotSpotNode.getAttribute("y"));

                        var xUnits = hotSpotNode.getAttribute("xunits");
                        if (xUnits == "pixels") {
                            style["graphicXOffset"] = -x * scale;
                        }
                        else if (xUnits == "insetPixels") {
                            style["graphicXOffset"] = -width + (x * scale);
                        }
                        else if (xUnits == "fraction") {
                            style["graphicXOffset"] = -width * x;
                        }

                        var yUnits = hotSpotNode.getAttribute("yunits");
                        if (yUnits == "pixels") {
                            style["graphicYOffset"] = -height + (y * scale) + 1;
                        }
                        else if (yUnits == "insetPixels") {
                            style["graphicYOffset"] = -(y * scale) + 1;
                        }
                        else if (yUnits == "fraction") {
                            style["graphicYOffset"] =  -height * (1 - y) + 1;
                        }
                    }

                    style["graphicWidth"] = width;
                    style["graphicHeight"] = height;
                    break;

                case "balloonstyle":
                    var balloonStyle = OpenLayers.Util.getXmlNodeValue(
                                            styleTypeNode);
                    if (balloonStyle) {
                        style["balloonStyle"] = balloonStyle.replace(
                                       this.regExes.straightBracket, "${$1}");
                    }
                    break;
                case "labelstyle":
                    var kmlColor = this.parseProperty(styleTypeNode, "*", "color");
                    var color = this.parseKmlColor(kmlColor);
                    if (color) {
                        style["fontColor"] = color.color;
                        style["fontOpacity"] = color.opacity;
                    }
                    break;

                default:
            }
        }

        // Some polygons have no line color, so we use the fillColor for that
        if (!style["strokeColor"] && style["fillColor"]) {
            style["strokeColor"] = style["fillColor"];
        }

        var id = node.getAttribute("id");
        if (id && style) {
            style.id = id;
        }

        return style;
    },

    /**
     * Method: parseStyleMaps
     * Looks for <Style> nodes in the data and parses them
     * Also parses <StyleMap> nodes, but only uses the 'normal' key
     * 
     * Parameters: 
     * nodes    - {Array} of {DOMElement} data to read/parse.
     * options  - {Object} Hash of options
     * 
     */
    parseStyleMaps: function(nodes, options) {
        // Only the default or "normal" part of the StyleMap is processed now
        // To do the select or "highlight" bit, we'd need to change lots more

        for(var i=0, len=nodes.length; i<len; i++) {
            var node = nodes[i];
            var pairs = this.getElementsByTagNameNS(node, "*", 
                            "Pair");

            var id = node.getAttribute("id");
            for (var j=0, jlen=pairs.length; j<jlen; j++) {
                var pair = pairs[j];
                // Use the shortcut in the SLD format to quickly retrieve the 
                // value of a node. Maybe it's good to have a method in 
                // Format.XML to do this
                var key = this.parseProperty(pair, "*", "key");
                var styleUrl = this.parseProperty(pair, "*", "styleUrl");

                if (styleUrl && key == "normal") {
                    this.styles[(options.styleBaseUrl || "") + "#" + id] =
                        this.styles[(options.styleBaseUrl || "") + styleUrl];
                }

                // TODO: implement the "select" part
                //if (styleUrl && key == "highlight") {
                //}

            }
        }

    },


    /**
     * Method: parseFeatures
     * Loop through all Placemark nodes and parse them.
     * Will create a list of features
     * 
     * Parameters: 
     * nodes    - {Array} of {DOMElement} data to read/parse.
     * options  - {Object} Hash of options
     * 
     */
    parseFeatures: function(nodes, options) {
        var features = [];
        for(var i=0, len=nodes.length; i<len; i++) {
            var featureNode = nodes[i];
            var feature = this.parseFeature.apply(this,[featureNode]) ;
            if(feature) {

                // Create reference to styleUrl 
                if (this.extractStyles && feature.attributes &&
                    feature.attributes.styleUrl) {
                    feature.style = this.getStyle(feature.attributes.styleUrl, options);
                }

                if (this.extractStyles) {
                    // Make sure that <Style> nodes within a placemark are 
                    // processed as well
                    var inlineStyleNode = this.getElementsByTagNameNS(featureNode,
                                                        "*",
                                                        "Style")[0];
                    if (inlineStyleNode) {
                        var inlineStyle= this.parseStyle(inlineStyleNode);
                        if (inlineStyle) {
                            feature.style = OpenLayers.Util.extend(
                                feature.style, inlineStyle
                            );
                        }
                    }
                }

                // check if gx:Track elements should be parsed
                if (this.extractTracks) {
                    var tracks = this.getElementsByTagNameNS(
                        featureNode, this.namespaces.gx, "Track"
                    );
                    if (tracks && tracks.length > 0) {
                        var track = tracks[0];
                        var container = {
                            features: [],
                            feature: feature
                        };
                        this.readNode(track, container);
                        if (container.features.length > 0) {
                            features.push.apply(features, container.features);
                        }
                    }
                } else {
                    // add feature to list of features
                    features.push(feature);                    
                }
            } else {
                throw "Bad Placemark: " + i;
            }
        }

        // add new features to existing feature list
        this.features = this.features.concat(features);
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "kml": {
            "when": function(node, container) {
                container.whens.push(OpenLayers.Date.parse(
                    this.getChildValue(node)
                ));
            },
            "_trackPointAttribute": function(node, container) {
                var name = node.nodeName.split(":").pop();
                container.attributes[name].push(this.getChildValue(node));
            }
        },
        "gx": {
            "Track": function(node, container) {
                var obj = {
                    whens: [],
                    points: [],
                    angles: []
                };
                if (this.trackAttributes) {
                    var name;
                    obj.attributes = {};
                    for (var i=0, ii=this.trackAttributes.length; i<ii; ++i) {
                        name = this.trackAttributes[i];
                        obj.attributes[name] = [];
                        if (!(name in this.readers.kml)) {
                            this.readers.kml[name] = this.readers.kml._trackPointAttribute;
                        }
                    }
                }
                this.readChildNodes(node, obj);
                if (obj.whens.length !== obj.points.length) {
                    throw new Error("gx:Track with unequal number of when (" +
                                    obj.whens.length + ") and gx:coord (" +
                                    obj.points.length + ") elements.");
                }
                var hasAngles = obj.angles.length > 0;
                if (hasAngles && obj.whens.length !== obj.angles.length) {
                    throw new Error("gx:Track with unequal number of when (" +
                                    obj.whens.length + ") and gx:angles (" +
                                    obj.angles.length + ") elements.");
                }
                var feature, point, angles;
                for (var i=0, ii=obj.whens.length; i<ii; ++i) {
                    feature = container.feature.clone();
                    feature.fid = container.feature.fid || container.feature.id;
                    point = obj.points[i];
                    feature.geometry = point;
                    if ("z" in point) {
                        feature.attributes.altitude = point.z;
                    }
                    if (this.internalProjection && this.externalProjection) {
                        feature.geometry.transform(
                            this.externalProjection, this.internalProjection
                        ); 
                    }
                    if (this.trackAttributes) {
                        for (var j=0, jj=this.trackAttributes.length; j<jj; ++j) {
                            feature.attributes[name] = obj.attributes[this.trackAttributes[j]][i];
                        }
                    }
                    feature.attributes.when = obj.whens[i];
                    feature.attributes.trackId = container.feature.id;
                    if (hasAngles) {
                        angles = obj.angles[i];
                        feature.attributes.heading = parseFloat(angles[0]);
                        feature.attributes.tilt = parseFloat(angles[1]);
                        feature.attributes.roll = parseFloat(angles[2]);
                    }
                    container.features.push(feature);
                }
            },
            "coord": function(node, container) {
                var str = this.getChildValue(node);
                var coords = str.replace(this.regExes.trimSpace, "").split(/\s+/);
                var point = new OpenLayers.Geometry.Point(coords[0], coords[1]);
                if (coords.length > 2) {
                    point.z = parseFloat(coords[2]);
                }
                container.points.push(point);
            },
            "angles": function(node, container) {
                var str = this.getChildValue(node);
                var parts = str.replace(this.regExes.trimSpace, "").split(/\s+/);
                container.angles.push(parts);
            }
        }
    },
    
    /**
     * Method: parseFeature
     * This function is the core of the KML parsing code in OpenLayers.
     *     It creates the geometries that are then attached to the returned
     *     feature, and calls parseAttributes() to get attribute data out.
     *
     * Parameters:
     * node - {DOMElement}
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A vector feature.
     */
    parseFeature: function(node) {
        // only accept one geometry per feature - look for highest "order"
        var order = ["MultiGeometry", "Polygon", "LineString", "Point"];
        var type, nodeList, geometry, parser;
        for(var i=0, len=order.length; i<len; ++i) {
            type = order[i];
            this.internalns = node.namespaceURI ? 
                    node.namespaceURI : this.kmlns;
            nodeList = this.getElementsByTagNameNS(node, 
                                                   this.internalns, type);
            if(nodeList.length > 0) {
                // only deal with first geometry of this type
                var parser = this.parseGeometry[type.toLowerCase()];
                if(parser) {
                    geometry = parser.apply(this, [nodeList[0]]);
                    if (this.internalProjection && this.externalProjection) {
                        geometry.transform(this.externalProjection, 
                                           this.internalProjection); 
                    }                       
                } else {
                    throw new TypeError("Unsupported geometry type: " + type);
                }
                // stop looking for different geometry types
                break;
            }
        }

        // construct feature (optionally with attributes)
        var attributes;
        if(this.extractAttributes) {
            attributes = this.parseAttributes(node);
        }
        var feature = new OpenLayers.Feature.Vector(geometry, attributes);

        var fid = node.getAttribute("id") || node.getAttribute("name");
        if(fid != null) {
            feature.fid = fid;
        }

        return feature;
    },        
    
    /**
     * Method: getStyle
     * Retrieves a style from a style hash using styleUrl as the key
     * If the styleUrl doesn't exist yet, we try to fetch it 
     * Internet
     * 
     * Parameters: 
     * styleUrl  - {String} URL of style
     * options   - {Object} Hash of options 
     *
     * Returns:
     * {Object}  - (reference to) Style hash
     */
    getStyle: function(styleUrl, options) {

        var styleBaseUrl = OpenLayers.Util.removeTail(styleUrl);

        var newOptions = OpenLayers.Util.extend({}, options);
        newOptions.depth++;
        newOptions.styleBaseUrl = styleBaseUrl;

        // Fetch remote Style URLs (if not fetched before) 
        if (!this.styles[styleUrl] 
                && !OpenLayers.String.startsWith(styleUrl, "#") 
                && newOptions.depth <= this.maxDepth
                && !this.fetched[styleBaseUrl] ) {

            var data = this.fetchLink(styleBaseUrl);
            if (data) {
                this.parseData(data, newOptions);
            }

        }

        // return requested style
        var style = OpenLayers.Util.extend({}, this.styles[styleUrl]);
        return style;
    },
    
    /**
     * Property: parseGeometry
     * Properties of this object are the functions that parse geometries based
     *     on their type.
     */
    parseGeometry: {
        
        /**
         * Method: parseGeometry.point
         * Given a KML node representing a point geometry, create an OpenLayers
         *     point geometry.
         *
         * Parameters:
         * node - {DOMElement} A KML Point node.
         *
         * Returns:
         * {<OpenLayers.Geometry.Point>} A point geometry.
         */
        point: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.internalns,
                                                       "coordinates");
            var coords = [];
            if(nodeList.length > 0) {
                var coordString = nodeList[0].firstChild.nodeValue;
                coordString = coordString.replace(this.regExes.removeSpace, "");
                coords = coordString.split(",");
            }

            var point = null;
            if(coords.length > 1) {
                // preserve third dimension
                if(coords.length == 2) {
                    coords[2] = null;
                }
                point = new OpenLayers.Geometry.Point(coords[0], coords[1],
                                                      coords[2]);
            } else {
                throw "Bad coordinate string: " + coordString;
            }
            return point;
        },
        
        /**
         * Method: parseGeometry.linestring
         * Given a KML node representing a linestring geometry, create an
         *     OpenLayers linestring geometry.
         *
         * Parameters:
         * node - {DOMElement} A KML LineString node.
         *
         * Returns:
         * {<OpenLayers.Geometry.LineString>} A linestring geometry.
         */
        linestring: function(node, ring) {
            var nodeList = this.getElementsByTagNameNS(node, this.internalns,
                                                       "coordinates");
            var line = null;
            if(nodeList.length > 0) {
                var coordString = this.getChildValue(nodeList[0]);

                coordString = coordString.replace(this.regExes.trimSpace,
                                                  "");
                coordString = coordString.replace(this.regExes.trimComma,
                                                  ",");
                var pointList = coordString.split(this.regExes.splitSpace);
                var numPoints = pointList.length;
                var points = new Array(numPoints);
                var coords, numCoords;
                for(var i=0; i<numPoints; ++i) {
                    coords = pointList[i].split(",");
                    numCoords = coords.length;
                    if(numCoords > 1) {
                        if(coords.length == 2) {
                            coords[2] = null;
                        }
                        points[i] = new OpenLayers.Geometry.Point(coords[0],
                                                                  coords[1],
                                                                  coords[2]);
                    } else {
                        throw "Bad LineString point coordinates: " +
                              pointList[i];
                    }
                }
                if(numPoints) {
                    if(ring) {
                        line = new OpenLayers.Geometry.LinearRing(points);
                    } else {
                        line = new OpenLayers.Geometry.LineString(points);
                    }
                } else {
                    throw "Bad LineString coordinates: " + coordString;
                }
            }

            return line;
        },
        
        /**
         * Method: parseGeometry.polygon
         * Given a KML node representing a polygon geometry, create an
         *     OpenLayers polygon geometry.
         *
         * Parameters:
         * node - {DOMElement} A KML Polygon node.
         *
         * Returns:
         * {<OpenLayers.Geometry.Polygon>} A polygon geometry.
         */
        polygon: function(node) {
            var nodeList = this.getElementsByTagNameNS(node, this.internalns,
                                                       "LinearRing");
            var numRings = nodeList.length;
            var components = new Array(numRings);
            if(numRings > 0) {
                // this assumes exterior ring first, inner rings after
                var ring;
                for(var i=0, len=nodeList.length; i<len; ++i) {
                    ring = this.parseGeometry.linestring.apply(this,
                                                        [nodeList[i], true]);
                    if(ring) {
                        components[i] = ring;
                    } else {
                        throw "Bad LinearRing geometry: " + i;
                    }
                }
            }
            return new OpenLayers.Geometry.Polygon(components);
        },
        
        /**
         * Method: parseGeometry.multigeometry
         * Given a KML node representing a multigeometry, create an
         *     OpenLayers geometry collection.
         *
         * Parameters:
         * node - {DOMElement} A KML MultiGeometry node.
         *
         * Returns:
         * {<OpenLayers.Geometry.Collection>} A geometry collection.
         */
        multigeometry: function(node) {
            var child, parser;
            var parts = [];
            var children = node.childNodes;
            for(var i=0, len=children.length; i<len; ++i ) {
                child = children[i];
                if(child.nodeType == 1) {
                    var type = (child.prefix) ?
                            child.nodeName.split(":")[1] :
                            child.nodeName;
                    var parser = this.parseGeometry[type.toLowerCase()];
                    if(parser) {
                        parts.push(parser.apply(this, [child]));
                    }
                }
            }
            return new OpenLayers.Geometry.Collection(parts);
        }
        
    },

    /**
     * Method: parseAttributes
     *
     * Parameters:
     * node - {DOMElement}
     *
     * Returns:
     * {Object} An attributes object.
     */
    parseAttributes: function(node) {
        var attributes = {};
       
        // Extended Data is parsed first.
        var edNodes = node.getElementsByTagName("ExtendedData");
        if (edNodes.length) {
            attributes = this.parseExtendedData(edNodes[0]);
        }
        
        // assume attribute nodes are type 1 children with a type 3 or 4 child
        var child, grandchildren, grandchild;
        var children = node.childNodes;

        for(var i=0, len=children.length; i<len; ++i) {
            child = children[i];
            if(child.nodeType == 1) {
                grandchildren = child.childNodes;
                if(grandchildren.length >= 1 && grandchildren.length <= 3) {
                    var grandchild;
                    switch (grandchildren.length) {
                        case 1:
                            grandchild = grandchildren[0];
                            break;
                        case 2:
                            var c1 = grandchildren[0];
                            var c2 = grandchildren[1];
                            grandchild = (c1.nodeType == 3 || c1.nodeType == 4) ?
                                c1 : c2;
                            break;
                        case 3:
                        default:
                            grandchild = grandchildren[1];
                            break;
                    }
                    if(grandchild.nodeType == 3 || grandchild.nodeType == 4) {
                        var name = (child.prefix) ?
                                child.nodeName.split(":")[1] :
                                child.nodeName;
                        var value = OpenLayers.Util.getXmlNodeValue(grandchild);
                        if (value) {
                            value = value.replace(this.regExes.trimSpace, "");
                            attributes[name] = value;
                        }
                    }
                } 
            }
        }
        return attributes;
    },

    /**
     * Method: parseExtendedData
     * Parse ExtendedData from KML. Limited support for schemas/datatypes.
     *     See http://code.google.com/apis/kml/documentation/kmlreference.html#extendeddata
     *     for more information on extendeddata.
     */
    parseExtendedData: function(node) {
        var attributes = {};
        var i, len, data, key;
        var dataNodes = node.getElementsByTagName("Data");
        for (i = 0, len = dataNodes.length; i < len; i++) {
            data = dataNodes[i];
            key = data.getAttribute("name");
            var ed = {};
            var valueNode = data.getElementsByTagName("value");
            if (valueNode.length) {
                ed['value'] = this.getChildValue(valueNode[0]);
            }
            if (this.kvpAttributes) {
                attributes[key] = ed['value'];
            } else {
                var nameNode = data.getElementsByTagName("displayName");
                if (nameNode.length) {
                    ed['displayName'] = this.getChildValue(nameNode[0]);
                }
                attributes[key] = ed;
            } 
        }
        var simpleDataNodes = node.getElementsByTagName("SimpleData");
        for (i = 0, len = simpleDataNodes.length; i < len; i++) {
            var ed = {};
            data = simpleDataNodes[i];
            key = data.getAttribute("name");
            ed['value'] = this.getChildValue(data);
            if (this.kvpAttributes) {
                attributes[key] = ed['value'];
            } else {
                ed['displayName'] = key;
                attributes[key] = ed;
            }
        }
        
        return attributes;    
    },
    
    /**
     * Method: parseProperty
     * Convenience method to find a node and return its value
     *
     * Parameters:
     * xmlNode    - {<DOMElement>}
     * namespace  - {String} namespace of the node to find
     * tagName    - {String} name of the property to parse
     * 
     * Returns:
     * {String} The value for the requested property (defaults to null)
     */    
    parseProperty: function(xmlNode, namespace, tagName) {
        var value;
        var nodeList = this.getElementsByTagNameNS(xmlNode, namespace, tagName);
        try {
            value = OpenLayers.Util.getXmlNodeValue(nodeList[0]);
        } catch(e) {
            value = null;
        }
     
        return value;
    },                                                              

    /**
     * APIMethod: write
     * Accept Feature Collection, and return a string. 
     * 
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} An array of features.
     *
     * Returns:
     * {String} A KML string.
     */
    write: function(features) {
        if(!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        var kml = this.createElementNS(this.kmlns, "kml");
        var folder = this.createFolderXML();
        for(var i=0, len=features.length; i<len; ++i) {
            folder.appendChild(this.createPlacemarkXML(features[i]));
        }
        kml.appendChild(folder);
        return OpenLayers.Format.XML.prototype.write.apply(this, [kml]);
    },

    /**
     * Method: createFolderXML
     * Creates and returns a KML folder node
     * 
     * Returns:
     * {DOMElement}
     */
    createFolderXML: function() {
        // Folder
        var folder = this.createElementNS(this.kmlns, "Folder");

        // Folder name
        if (this.foldersName) {
            var folderName = this.createElementNS(this.kmlns, "name");
            var folderNameText = this.createTextNode(this.foldersName); 
            folderName.appendChild(folderNameText);
            folder.appendChild(folderName);
        }

        // Folder description
        if (this.foldersDesc) {
            var folderDesc = this.createElementNS(this.kmlns, "description");        
            var folderDescText = this.createTextNode(this.foldersDesc); 
            folderDesc.appendChild(folderDescText);
            folder.appendChild(folderDesc);
        }

        return folder;
    },

    /**
     * Method: createPlacemarkXML
     * Creates and returns a KML placemark node representing the given feature. 
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * 
     * Returns:
     * {DOMElement}
     */
    createPlacemarkXML: function(feature) {        
        // Placemark name
        var placemarkName = this.createElementNS(this.kmlns, "name");
        var name = feature.style && feature.style.label ? feature.style.label :
                   feature.attributes.name || feature.id;
        placemarkName.appendChild(this.createTextNode(name));

        // Placemark description
        var placemarkDesc = this.createElementNS(this.kmlns, "description");
        var desc = feature.attributes.description || this.placemarksDesc;
        placemarkDesc.appendChild(this.createTextNode(desc));
        
        // Placemark
        var placemarkNode = this.createElementNS(this.kmlns, "Placemark");
        if(feature.fid != null) {
            placemarkNode.setAttribute("id", feature.fid);
        }
        placemarkNode.appendChild(placemarkName);
        placemarkNode.appendChild(placemarkDesc);

        // Geometry node (Point, LineString, etc. nodes)
        var geometryNode = this.buildGeometryNode(feature.geometry);
        placemarkNode.appendChild(geometryNode);        
        
        // output attributes as extendedData
        if (feature.attributes) {
            var edNode = this.buildExtendedData(feature.attributes);
            if (edNode) {
                placemarkNode.appendChild(edNode);
            }
        }
        
        return placemarkNode;
    },    

    /**
     * Method: buildGeometryNode
     * Builds and returns a KML geometry node with the given geometry.
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement}
     */
    buildGeometryNode: function(geometry) {
        var className = geometry.CLASS_NAME;
        var type = className.substring(className.lastIndexOf(".") + 1);
        var builder = this.buildGeometry[type.toLowerCase()];
        var node = null;
        if(builder) {
            node = builder.apply(this, [geometry]);
        }
        return node;
    },

    /**
     * Property: buildGeometry
     * Object containing methods to do the actual geometry node building
     *     based on geometry type.
     */
    buildGeometry: {
        // TBD: Anybody care about namespace aliases here (these nodes have
        //    no prefixes)?

        /**
         * Method: buildGeometry.point
         * Given an OpenLayers point geometry, create a KML point.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Point>} A point geometry.
         *
         * Returns:
         * {DOMElement} A KML point node.
         */
        point: function(geometry) {
            var kml = this.createElementNS(this.kmlns, "Point");
            kml.appendChild(this.buildCoordinatesNode(geometry));
            return kml;
        },
        
        /**
         * Method: buildGeometry.multipoint
         * Given an OpenLayers multipoint geometry, create a KML
         *     GeometryCollection.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Point>} A multipoint geometry.
         *
         * Returns:
         * {DOMElement} A KML GeometryCollection node.
         */
        multipoint: function(geometry) {
            return this.buildGeometry.collection.apply(this, [geometry]);
        },

        /**
         * Method: buildGeometry.linestring
         * Given an OpenLayers linestring geometry, create a KML linestring.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.LineString>} A linestring geometry.
         *
         * Returns:
         * {DOMElement} A KML linestring node.
         */
        linestring: function(geometry) {
            var kml = this.createElementNS(this.kmlns, "LineString");
            kml.appendChild(this.buildCoordinatesNode(geometry));
            return kml;
        },
        
        /**
         * Method: buildGeometry.multilinestring
         * Given an OpenLayers multilinestring geometry, create a KML
         *     GeometryCollection.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Point>} A multilinestring geometry.
         *
         * Returns:
         * {DOMElement} A KML GeometryCollection node.
         */
        multilinestring: function(geometry) {
            return this.buildGeometry.collection.apply(this, [geometry]);
        },

        /**
         * Method: buildGeometry.linearring
         * Given an OpenLayers linearring geometry, create a KML linearring.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.LinearRing>} A linearring geometry.
         *
         * Returns:
         * {DOMElement} A KML linearring node.
         */
        linearring: function(geometry) {
            var kml = this.createElementNS(this.kmlns, "LinearRing");
            kml.appendChild(this.buildCoordinatesNode(geometry));
            return kml;
        },
        
        /**
         * Method: buildGeometry.polygon
         * Given an OpenLayers polygon geometry, create a KML polygon.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Polygon>} A polygon geometry.
         *
         * Returns:
         * {DOMElement} A KML polygon node.
         */
        polygon: function(geometry) {
            var kml = this.createElementNS(this.kmlns, "Polygon");
            var rings = geometry.components;
            var ringMember, ringGeom, type;
            for(var i=0, len=rings.length; i<len; ++i) {
                type = (i==0) ? "outerBoundaryIs" : "innerBoundaryIs";
                ringMember = this.createElementNS(this.kmlns, type);
                ringGeom = this.buildGeometry.linearring.apply(this,
                                                               [rings[i]]);
                ringMember.appendChild(ringGeom);
                kml.appendChild(ringMember);
            }
            return kml;
        },
        
        /**
         * Method: buildGeometry.multipolygon
         * Given an OpenLayers multipolygon geometry, create a KML
         *     GeometryCollection.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Point>} A multipolygon geometry.
         *
         * Returns:
         * {DOMElement} A KML GeometryCollection node.
         */
        multipolygon: function(geometry) {
            return this.buildGeometry.collection.apply(this, [geometry]);
        },

        /**
         * Method: buildGeometry.collection
         * Given an OpenLayers geometry collection, create a KML MultiGeometry.
         *
         * Parameters:
         * geometry - {<OpenLayers.Geometry.Collection>} A geometry collection.
         *
         * Returns:
         * {DOMElement} A KML MultiGeometry node.
         */
        collection: function(geometry) {
            var kml = this.createElementNS(this.kmlns, "MultiGeometry");
            var child;
            for(var i=0, len=geometry.components.length; i<len; ++i) {
                child = this.buildGeometryNode.apply(this,
                                                     [geometry.components[i]]);
                if(child) {
                    kml.appendChild(child);
                }
            }
            return kml;
        }
    },

    /**
     * Method: buildCoordinatesNode
     * Builds and returns the KML coordinates node with the given geometry
     * <coordinates>...</coordinates>
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement}
     */     
    buildCoordinatesNode: function(geometry) {
        var coordinatesNode = this.createElementNS(this.kmlns, "coordinates");
        
        var path;
        var points = geometry.components;
        if(points) {
            // LineString or LinearRing
            var point;
            var numPoints = points.length;
            var parts = new Array(numPoints);
            for(var i=0; i<numPoints; ++i) {
                point = points[i];
                parts[i] = this.buildCoordinates(point);
            }
            path = parts.join(" ");
        } else {
            // Point
            path = this.buildCoordinates(geometry);
        }
        
        var txtNode = this.createTextNode(path);
        coordinatesNode.appendChild(txtNode);
        
        return coordinatesNode;
    },    
    
    /**
     * Method: buildCoordinates
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     *
     * Returns
     * {String} a coordinate pair
     */
    buildCoordinates: function(point) {
        if (this.internalProjection && this.externalProjection) {
            point = point.clone();
            point.transform(this.internalProjection, 
                               this.externalProjection);
        }
        return point.x + "," + point.y;                     
    },

    /**
     * Method: buildExtendedData
     *
     * Parameters:
     * attributes - {Object}
     *
     * Returns
     * {DOMElement} A KML ExtendedData node or {null} if no attributes.
     */
    buildExtendedData: function(attributes) {
        var extendedData = this.createElementNS(this.kmlns, "ExtendedData");
        for (var attributeName in attributes) {
            // empty, name, description, styleUrl attributes ignored
            if (attributes[attributeName] && attributeName != "name" && attributeName != "description" && attributeName != "styleUrl") {
                var data = this.createElementNS(this.kmlns, "Data");
                data.setAttribute("name", attributeName);
                var value = this.createElementNS(this.kmlns, "value");
                if (typeof attributes[attributeName] == "object") {
                    // cater for object attributes with 'value' properties
                    // other object properties will output an empty node
                    if (attributes[attributeName].value) {
                        value.appendChild(this.createTextNode(attributes[attributeName].value));
                    }
                    if (attributes[attributeName].displayName) {
                        var displayName = this.createElementNS(this.kmlns, "displayName");
                        // displayName always written as CDATA
                        displayName.appendChild(this.getXMLDoc().createCDATASection(attributes[attributeName].displayName));
                        data.appendChild(displayName);
                    }
                } else {
                    value.appendChild(this.createTextNode(attributes[attributeName]));
                }
                data.appendChild(value);
                extendedData.appendChild(data);
            }
        }
        if (this.isSimpleContent(extendedData)) {
            return null;
        } else {
            return extendedData;
        }
    },
    
    CLASS_NAME: "OpenLayers.Format.KML" 
});
/* ======================================================================
    OpenLayers/Popup.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */


/**
 * Class: OpenLayers.Popup
 * A popup is a small div that can opened and closed on the map.
 * Typically opened in response to clicking on a marker.  
 * See <OpenLayers.Marker>.  Popup's don't require their own
 * layer and are added the the map using the <OpenLayers.Map.addPopup>
 * method.
 *
 * Example:
 * (code)
 * popup = new OpenLayers.Popup("chicken", 
 *                    new OpenLayers.LonLat(5,40),
 *                    new OpenLayers.Size(200,200),
 *                    "example popup",
 *                    true);
 *       
 * map.addPopup(popup);
 * (end)
 */
OpenLayers.Popup = OpenLayers.Class({

    /** 
     * Property: events  
     * {<OpenLayers.Events>} custom event manager 
     */
    events: null,
    
    /** Property: id
     * {String} the unique identifier assigned to this popup.
     */
    id: "",

    /** 
     * Property: lonlat 
     * {<OpenLayers.LonLat>} the position of this popup on the map
     */
    lonlat: null,

    /** 
     * Property: div 
     * {DOMElement} the div that contains this popup.
     */
    div: null,

    /** 
     * Property: contentSize 
     * {<OpenLayers.Size>} the width and height of the content.
     */
    contentSize: null,    

    /** 
     * Property: size 
     * {<OpenLayers.Size>} the width and height of the popup.
     */
    size: null,    

    /** 
     * Property: contentHTML 
     * {String} An HTML string for this popup to display.
     */
    contentHTML: null,
    
    /** 
     * Property: backgroundColor 
     * {String} the background color used by the popup.
     */
    backgroundColor: "",
    
    /** 
     * Property: opacity 
     * {float} the opacity of this popup (between 0.0 and 1.0)
     */
    opacity: "",

    /** 
     * Property: border 
     * {String} the border size of the popup.  (eg 2px)
     */
    border: "",
    
    /** 
     * Property: contentDiv 
     * {DOMElement} a reference to the element that holds the content of
     *              the div.
     */
    contentDiv: null,
    
    /** 
     * Property: groupDiv 
     * {DOMElement} First and only child of 'div'. The group Div contains the
     *     'contentDiv' and the 'closeDiv'.
     */
    groupDiv: null,

    /** 
     * Property: closeDiv
     * {DOMElement} the optional closer image
     */
    closeDiv: null,

    /** 
     * APIProperty: autoSize
     * {Boolean} Resize the popup to auto-fit the contents.
     *     Default is false.
     */
    autoSize: false,

    /**
     * APIProperty: minSize
     * {<OpenLayers.Size>} Minimum size allowed for the popup's contents.
     */
    minSize: null,

    /**
     * APIProperty: maxSize
     * {<OpenLayers.Size>} Maximum size allowed for the popup's contents.
     */
    maxSize: null,

    /** 
     * Property: displayClass
     * {String} The CSS class of the popup.
     */
    displayClass: "olPopup",

    /** 
     * Property: contentDisplayClass
     * {String} The CSS class of the popup content div.
     */
    contentDisplayClass: "olPopupContent",

    /** 
     * Property: padding 
     * {int or <OpenLayers.Bounds>} An extra opportunity to specify internal 
     *     padding of the content div inside the popup. This was originally
     *     confused with the css padding as specified in style.css's 
     *     'olPopupContent' class. We would like to get rid of this altogether,
     *     except that it does come in handy for the framed and anchoredbubble
     *     popups, who need to maintain yet another barrier between their 
     *     content and the outer border of the popup itself. 
     * 
     *     Note that in order to not break API, we must continue to support 
     *     this property being set as an integer. Really, though, we'd like to 
     *     have this specified as a Bounds object so that user can specify
     *     distinct left, top, right, bottom paddings. With the 3.0 release
     *     we can make this only a bounds.
     */
    padding: 0,

    /** 
     * Property: disableFirefoxOverflowHack
     * {Boolean} The hack for overflow in Firefox causes all elements 
     *     to be re-drawn, which causes Flash elements to be 
     *     re-initialized, which is troublesome.
     *     With this property the hack can be disabled.
     */
    disableFirefoxOverflowHack: false,

    /**
     * Method: fixPadding
     * To be removed in 3.0, this function merely helps us to deal with the 
     *     case where the user may have set an integer value for padding, 
     *     instead of an <OpenLayers.Bounds> object.
     */
    fixPadding: function() {
        if (typeof this.padding == "number") {
            this.padding = new OpenLayers.Bounds(
                this.padding, this.padding, this.padding, this.padding
            );
        }
    },

    /**
     * APIProperty: panMapIfOutOfView
     * {Boolean} When drawn, pan map such that the entire popup is visible in
     *     the current viewport (if necessary).
     *     Default is false.
     */
    panMapIfOutOfView: false,
    
    /**
     * APIProperty: keepInMap 
     * {Boolean} If panMapIfOutOfView is false, and this property is true, 
     *     contrain the popup such that it always fits in the available map
     *     space. By default, this is not set on the base class. If you are
     *     creating popups that are near map edges and not allowing pannning,
     *     and especially if you have a popup which has a
     *     fixedRelativePosition, setting this to false may be a smart thing to
     *     do. Subclasses may want to override this setting.
     *   
     *     Default is false.
     */
    keepInMap: false,

    /**
     * APIProperty: closeOnMove
     * {Boolean} When map pans, close the popup.
     *     Default is false.
     */
    closeOnMove: false,
    
    /** 
     * Property: map 
     * {<OpenLayers.Map>} this gets set in Map.js when the popup is added to the map
     */
    map: null,

    /** 
    * Constructor: OpenLayers.Popup
    * Create a popup.
    * 
    * Parameters: 
    * id - {String} a unqiue identifier for this popup.  If null is passed
    *               an identifier will be automatically generated. 
    * lonlat - {<OpenLayers.LonLat>}  The position on the map the popup will
    *                                 be shown.
    * contentSize - {<OpenLayers.Size>} The size of the content.
    * contentHTML - {String}          An HTML string to display inside the   
    *                                 popup.
    * closeBox - {Boolean}            Whether to display a close box inside
    *                                 the popup.
    * closeBoxCallback - {Function}   Function to be called on closeBox click.
    */
    initialize:function(id, lonlat, contentSize, contentHTML, closeBox, closeBoxCallback) {
        if (id == null) {
            id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
        }

        this.id = id;
        this.lonlat = lonlat;

        this.contentSize = (contentSize != null) ? contentSize 
                                  : new OpenLayers.Size(
                                                   OpenLayers.Popup.WIDTH,
                                                   OpenLayers.Popup.HEIGHT);
        if (contentHTML != null) { 
             this.contentHTML = contentHTML;
        }
        this.backgroundColor = OpenLayers.Popup.COLOR;
        this.opacity = OpenLayers.Popup.OPACITY;
        this.border = OpenLayers.Popup.BORDER;

        this.div = OpenLayers.Util.createDiv(this.id, null, null, 
                                             null, null, null, "hidden");
        this.div.className = this.displayClass;
        
        var groupDivId = this.id + "_GroupDiv";
        this.groupDiv = OpenLayers.Util.createDiv(groupDivId, null, null, 
                                                    null, "relative", null,
                                                    "hidden");

        var id = this.div.id + "_contentDiv";
        this.contentDiv = OpenLayers.Util.createDiv(id, null, this.contentSize.clone(), 
                                                    null, "relative");
        this.contentDiv.className = this.contentDisplayClass;
        this.groupDiv.appendChild(this.contentDiv);
        this.div.appendChild(this.groupDiv);

        if (closeBox) {
            this.addCloseBox(closeBoxCallback);
        } 

        this.registerEvents();
    },

    /** 
     * Method: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {

        this.id = null;
        this.lonlat = null;
        this.size = null;
        this.contentHTML = null;
        
        this.backgroundColor = null;
        this.opacity = null;
        this.border = null;
        
        if (this.closeOnMove && this.map) {
            this.map.events.unregister("movestart", this, this.hide);
        }

        this.events.destroy();
        this.events = null;
        
        if (this.closeDiv) {
            OpenLayers.Event.stopObservingElement(this.closeDiv); 
            this.groupDiv.removeChild(this.closeDiv);
        }
        this.closeDiv = null;
        
        this.div.removeChild(this.groupDiv);
        this.groupDiv = null;

        if (this.map != null) {
            this.map.removePopup(this);
        }
        this.map = null;
        this.div = null;
        
        this.autoSize = null;
        this.minSize = null;
        this.maxSize = null;
        this.padding = null;
        this.panMapIfOutOfView = null;
    },

    /** 
    * Method: draw
    * Constructs the elements that make up the popup.
    *
    * Parameters:
    * px - {<OpenLayers.Pixel>} the position the popup in pixels.
    * 
    * Returns:
    * {DOMElement} Reference to a div that contains the drawn popup
    */
    draw: function(px) {
        if (px == null) {
            if ((this.lonlat != null) && (this.map != null)) {
                px = this.map.getLayerPxFromLonLat(this.lonlat);
            }
        }

        // this assumes that this.map already exists, which is okay because 
        // this.draw is only called once the popup has been added to the map.
        if (this.closeOnMove) {
            this.map.events.register("movestart", this, this.hide);
        }
        
        //listen to movestart, moveend to disable overflow (FF bug)
        if (!this.disableFirefoxOverflowHack && OpenLayers.BROWSER_NAME == 'firefox') {
            this.map.events.register("movestart", this, function() {
                var style = document.defaultView.getComputedStyle(
                    this.contentDiv, null
                );
                var currentOverflow = style.getPropertyValue("overflow");
                if (currentOverflow != "hidden") {
                    this.contentDiv._oldOverflow = currentOverflow;
                    this.contentDiv.style.overflow = "hidden";
                }
            });
            this.map.events.register("moveend", this, function() {
                var oldOverflow = this.contentDiv._oldOverflow;
                if (oldOverflow) {
                    this.contentDiv.style.overflow = oldOverflow;
                    this.contentDiv._oldOverflow = null;
                }
            });
        }

        this.moveTo(px);
        if (!this.autoSize && !this.size) {
            this.setSize(this.contentSize);
        }
        this.setBackgroundColor();
        this.setOpacity();
        this.setBorder();
        this.setContentHTML();
        
        if (this.panMapIfOutOfView) {
            this.panIntoView();
        }    

        return this.div;
    },

    /** 
     * Method: updatePosition
     * if the popup has a lonlat and its map members set, 
     * then have it move itself to its proper position
     */
    updatePosition: function() {
        if ((this.lonlat) && (this.map)) {
            var px = this.map.getLayerPxFromLonLat(this.lonlat);
            if (px) {
                this.moveTo(px);           
            }    
        }
    },

    /**
     * Method: moveTo
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>} the top and left position of the popup div. 
     */
    moveTo: function(px) {
        if ((px != null) && (this.div != null)) {
            this.div.style.left = px.x + "px";
            this.div.style.top = px.y + "px";
        }
    },

    /**
     * Method: visible
     *
     * Returns:      
     * {Boolean} Boolean indicating whether or not the popup is visible
     */
    visible: function() {
        return OpenLayers.Element.visible(this.div);
    },

    /**
     * Method: toggle
     * Toggles visibility of the popup.
     */
    toggle: function() {
        if (this.visible()) {
            this.hide();
        } else {
            this.show();
        }
    },

    /**
     * Method: show
     * Makes the popup visible.
     */
    show: function() {
        this.div.style.display = '';

        if (this.panMapIfOutOfView) {
            this.panIntoView();
        }    
    },

    /**
     * Method: hide
     * Makes the popup invisible.
     */
    hide: function() {
        this.div.style.display = 'none';
    },

    /**
     * Method: setSize
     * Used to adjust the size of the popup. 
     *
     * Parameters:
     * contentSize - {<OpenLayers.Size>} the new size for the popup's 
     *     contents div (in pixels).
     */
    setSize:function(contentSize) { 
        this.size = contentSize.clone(); 
        
        // if our contentDiv has a css 'padding' set on it by a stylesheet, we 
        //  must add that to the desired "size". 
        var contentDivPadding = this.getContentDivPadding();
        var wPadding = contentDivPadding.left + contentDivPadding.right;
        var hPadding = contentDivPadding.top + contentDivPadding.bottom;

        // take into account the popup's 'padding' property
        this.fixPadding();
        wPadding += this.padding.left + this.padding.right;
        hPadding += this.padding.top + this.padding.bottom;

        // make extra space for the close div
        if (this.closeDiv) {
            var closeDivWidth = parseInt(this.closeDiv.style.width);
            wPadding += closeDivWidth + contentDivPadding.right;
        }

        //increase size of the main popup div to take into account the 
        // users's desired padding and close div.        
        this.size.w += wPadding;
        this.size.h += hPadding;

        //now if our browser is IE, we need to actually make the contents 
        // div itself bigger to take its own padding into effect. this makes 
        // me want to shoot someone, but so it goes.
        if (OpenLayers.BROWSER_NAME == "msie") {
            this.contentSize.w += 
                contentDivPadding.left + contentDivPadding.right;
            this.contentSize.h += 
                contentDivPadding.bottom + contentDivPadding.top;
        }

        if (this.div != null) {
            this.div.style.width = this.size.w + "px";
            this.div.style.height = this.size.h + "px";
        }
        if (this.contentDiv != null){
            this.contentDiv.style.width = contentSize.w + "px";
            this.contentDiv.style.height = contentSize.h + "px";
        }
    },  

    /**
     * APIMethod: updateSize
     * Auto size the popup so that it precisely fits its contents (as 
     *     determined by this.contentDiv.innerHTML). Popup size will, of
     *     course, be limited by the available space on the current map
     */
    updateSize: function() {
        
        // determine actual render dimensions of the contents by putting its
        // contents into a fake contentDiv (for the CSS) and then measuring it
        var preparedHTML = "<div class='" + this.contentDisplayClass+ "'>" + 
            this.contentDiv.innerHTML + 
            "</div>";
 
        var containerElement = (this.map) ? this.map.div : document.body;
        var realSize = OpenLayers.Util.getRenderedDimensions(
            preparedHTML, null, {
                displayClass: this.displayClass,
                containerElement: containerElement
            }
        );

        // is the "real" size of the div is safe to display in our map?
        var safeSize = this.getSafeContentSize(realSize);

        var newSize = null;
        if (safeSize.equals(realSize)) {
            //real size of content is small enough to fit on the map, 
            // so we use real size.
            newSize = realSize;

        } else {

            // make a new 'size' object with the clipped dimensions 
            // set or null if not clipped.
            var fixedSize = {
                w: (safeSize.w < realSize.w) ? safeSize.w : null,
                h: (safeSize.h < realSize.h) ? safeSize.h : null
            };
        
            if (fixedSize.w && fixedSize.h) {
                //content is too big in both directions, so we will use 
                // max popup size (safeSize), knowing well that it will 
                // overflow both ways.                
                newSize = safeSize;
            } else {
                //content is clipped in only one direction, so we need to 
                // run getRenderedDimensions() again with a fixed dimension
                var clippedSize = OpenLayers.Util.getRenderedDimensions(
                    preparedHTML, fixedSize, {
                        displayClass: this.contentDisplayClass,
                        containerElement: containerElement
                    }
                );
                
                //if the clipped size is still the same as the safeSize, 
                // that means that our content must be fixed in the 
                // offending direction. If overflow is 'auto', this means 
                // we are going to have a scrollbar for sure, so we must 
                // adjust for that.
                //
                var currentOverflow = OpenLayers.Element.getStyle(
                    this.contentDiv, "overflow"
                );
                if ( (currentOverflow != "hidden") && 
                     (clippedSize.equals(safeSize)) ) {
                    var scrollBar = OpenLayers.Util.getScrollbarWidth();
                    if (fixedSize.w) {
                        clippedSize.h += scrollBar;
                    } else {
                        clippedSize.w += scrollBar;
                    }
                }
                
                newSize = this.getSafeContentSize(clippedSize);
            }
        }                        
        this.setSize(newSize);     
    },    

    /**
     * Method: setBackgroundColor
     * Sets the background color of the popup.
     *
     * Parameters:
     * color - {String} the background color.  eg "#FFBBBB"
     */
    setBackgroundColor:function(color) { 
        if (color != undefined) {
            this.backgroundColor = color; 
        }
        
        if (this.div != null) {
            this.div.style.backgroundColor = this.backgroundColor;
        }
    },  
    
    /**
     * Method: setOpacity
     * Sets the opacity of the popup.
     * 
     * Parameters:
     * opacity - {float} A value between 0.0 (transparent) and 1.0 (solid).   
     */
    setOpacity:function(opacity) { 
        if (opacity != undefined) {
            this.opacity = opacity; 
        }
        
        if (this.div != null) {
            // for Mozilla and Safari
            this.div.style.opacity = this.opacity;

            // for IE
            this.div.style.filter = 'alpha(opacity=' + this.opacity*100 + ')';
        }
    },  
    
    /**
     * Method: setBorder
     * Sets the border style of the popup.
     *
     * Parameters:
     * border - {String} The border style value. eg 2px 
     */
    setBorder:function(border) { 
        if (border != undefined) {
            this.border = border;
        }
        
        if (this.div != null) {
            this.div.style.border = this.border;
        }
    },      
    
    /**
     * Method: setContentHTML
     * Allows the user to set the HTML content of the popup.
     *
     * Parameters:
     * contentHTML - {String} HTML for the div.
     */
    setContentHTML:function(contentHTML) {

        if (contentHTML != null) {
            this.contentHTML = contentHTML;
        }
       
        if ((this.contentDiv != null) && 
            (this.contentHTML != null) &&
            (this.contentHTML != this.contentDiv.innerHTML)) {
       
            this.contentDiv.innerHTML = this.contentHTML;
       
            if (this.autoSize) {
                
                //if popup has images, listen for when they finish
                // loading and resize accordingly
                this.registerImageListeners();

                //auto size the popup to its current contents
                this.updateSize();
            }
        }    

    },
    
    /**
     * Method: registerImageListeners
     * Called when an image contained by the popup loaded. this function
     *     updates the popup size, then unregisters the image load listener.
     */   
    registerImageListeners: function() { 

        // As the images load, this function will call updateSize() to 
        // resize the popup to fit the content div (which presumably is now
        // bigger than when the image was not loaded).
        // 
        // If the 'panMapIfOutOfView' property is set, we will pan the newly
        // resized popup back into view.
        // 
        // Note that this function, when called, will have 'popup' and 
        // 'img' properties in the context.
        //
        var onImgLoad = function() {
            if (this.popup.id === null) { // this.popup has been destroyed!
                return;
            }
            this.popup.updateSize();
     
            if ( this.popup.visible() && this.popup.panMapIfOutOfView ) {
                this.popup.panIntoView();
            }

            OpenLayers.Event.stopObserving(
                this.img, "load", this.img._onImageLoad
            );
    
        };

        //cycle through the images and if their size is 0x0, that means that 
        // they haven't been loaded yet, so we attach the listener, which 
        // will fire when the images finish loading and will resize the 
        // popup accordingly to its new size.
        var images = this.contentDiv.getElementsByTagName("img");
        for (var i = 0, len = images.length; i < len; i++) {
            var img = images[i];
            if (img.width == 0 || img.height == 0) {

                var context = {
                    'popup': this,
                    'img': img
                };

                //expando this function to the image itself before registering
                // it. This way we can easily and properly unregister it.
                img._onImgLoad = OpenLayers.Function.bind(onImgLoad, context);

                OpenLayers.Event.observe(img, 'load', img._onImgLoad);
            }    
        } 
    },

    /**
     * APIMethod: getSafeContentSize
     * 
     * Parameters:
     * size - {<OpenLayers.Size>} Desired size to make the popup.
     * 
     * Returns:
     * {<OpenLayers.Size>} A size to make the popup which is neither smaller
     *     than the specified minimum size, nor bigger than the maximum 
     *     size (which is calculated relative to the size of the viewport).
     */
    getSafeContentSize: function(size) {

        var safeContentSize = size.clone();

        // if our contentDiv has a css 'padding' set on it by a stylesheet, we 
        //  must add that to the desired "size". 
        var contentDivPadding = this.getContentDivPadding();
        var wPadding = contentDivPadding.left + contentDivPadding.right;
        var hPadding = contentDivPadding.top + contentDivPadding.bottom;

        // take into account the popup's 'padding' property
        this.fixPadding();
        wPadding += this.padding.left + this.padding.right;
        hPadding += this.padding.top + this.padding.bottom;

        if (this.closeDiv) {
            var closeDivWidth = parseInt(this.closeDiv.style.width);
            wPadding += closeDivWidth + contentDivPadding.right;
        }

        // prevent the popup from being smaller than a specified minimal size
        if (this.minSize) {
            safeContentSize.w = Math.max(safeContentSize.w, 
                (this.minSize.w - wPadding));
            safeContentSize.h = Math.max(safeContentSize.h, 
                (this.minSize.h - hPadding));
        }

        // prevent the popup from being bigger than a specified maximum size
        if (this.maxSize) {
            safeContentSize.w = Math.min(safeContentSize.w, 
                (this.maxSize.w - wPadding));
            safeContentSize.h = Math.min(safeContentSize.h, 
                (this.maxSize.h - hPadding));
        }
        
        //make sure the desired size to set doesn't result in a popup that 
        // is bigger than the map's viewport.
        //
        if (this.map && this.map.size) {
            
            var extraX = 0, extraY = 0;
            if (this.keepInMap && !this.panMapIfOutOfView) {
                var px = this.map.getPixelFromLonLat(this.lonlat);
                switch (this.relativePosition) {
                    case "tr":
                        extraX = px.x;
                        extraY = this.map.size.h - px.y;
                        break;
                    case "tl":
                        extraX = this.map.size.w - px.x;
                        extraY = this.map.size.h - px.y;
                        break;
                    case "bl":
                        extraX = this.map.size.w - px.x;
                        extraY = px.y;
                        break;
                    case "br":
                        extraX = px.x;
                        extraY = px.y;
                        break;
                    default:    
                        extraX = px.x;
                        extraY = this.map.size.h - px.y;
                        break;
                }
            }    
          
            var maxY = this.map.size.h - 
                this.map.paddingForPopups.top - 
                this.map.paddingForPopups.bottom - 
                hPadding - extraY;
            
            var maxX = this.map.size.w - 
                this.map.paddingForPopups.left - 
                this.map.paddingForPopups.right - 
                wPadding - extraX;
            
            safeContentSize.w = Math.min(safeContentSize.w, maxX);
            safeContentSize.h = Math.min(safeContentSize.h, maxY);
        }
        
        return safeContentSize;
    },
    
    /**
     * Method: getContentDivPadding
     * Glorious, oh glorious hack in order to determine the css 'padding' of 
     *     the contentDiv. IE/Opera return null here unless we actually add the 
     *     popup's main 'div' element (which contains contentDiv) to the DOM. 
     *     So we make it invisible and then add it to the document temporarily. 
     *
     *     Once we've taken the padding readings we need, we then remove it 
     *     from the DOM (it will actually get added to the DOM in 
     *     Map.js's addPopup)
     *
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getContentDivPadding: function() {

        //use cached value if we have it
        var contentDivPadding = this._contentDivPadding;
        if (!contentDivPadding) {

            if (this.div.parentNode == null) {
                //make the div invisible and add it to the page        
                this.div.style.display = "none";
                document.body.appendChild(this.div);
            }
                    
            //read the padding settings from css, put them in an OL.Bounds        
            contentDivPadding = new OpenLayers.Bounds(
                OpenLayers.Element.getStyle(this.contentDiv, "padding-left"),
                OpenLayers.Element.getStyle(this.contentDiv, "padding-bottom"),
                OpenLayers.Element.getStyle(this.contentDiv, "padding-right"),
                OpenLayers.Element.getStyle(this.contentDiv, "padding-top")
            );
    
            //cache the value
            this._contentDivPadding = contentDivPadding;

            if (this.div.parentNode == document.body) {
                //remove the div from the page and make it visible again
                document.body.removeChild(this.div);
                this.div.style.display = "";
            }
        }
        return contentDivPadding;
    },

    /**
     * Method: addCloseBox
     * 
     * Parameters:
     * callback - {Function} The callback to be called when the close button
     *     is clicked.
     */
    addCloseBox: function(callback) {

        this.closeDiv = OpenLayers.Util.createDiv(
            this.id + "_close", null, {w: 17, h: 17}
        );
        this.closeDiv.className = "olPopupCloseBox"; 
        
        // use the content div's css padding to determine if we should
        //  padd the close div
        var contentDivPadding = this.getContentDivPadding();
         
        this.closeDiv.style.right = contentDivPadding.right + "px";
        this.closeDiv.style.top = contentDivPadding.top + "px";
        this.groupDiv.appendChild(this.closeDiv);

        var closePopup = callback || function(e) {
            this.hide();
            OpenLayers.Event.stop(e);
        };
        OpenLayers.Event.observe(this.closeDiv, "touchend", 
                OpenLayers.Function.bindAsEventListener(closePopup, this));
        OpenLayers.Event.observe(this.closeDiv, "click", 
                OpenLayers.Function.bindAsEventListener(closePopup, this));
    },

    /**
     * Method: panIntoView
     * Pans the map such that the popup is totaly viewable (if necessary)
     */
    panIntoView: function() {
        
        var mapSize = this.map.getSize();
    
        //start with the top left corner of the popup, in px, 
        // relative to the viewport
        var origTL = this.map.getViewPortPxFromLayerPx( new OpenLayers.Pixel(
            parseInt(this.div.style.left),
            parseInt(this.div.style.top)
        ));
        var newTL = origTL.clone();
    
        //new left (compare to margins, using this.size to calculate right)
        if (origTL.x < this.map.paddingForPopups.left) {
            newTL.x = this.map.paddingForPopups.left;
        } else 
        if ( (origTL.x + this.size.w) > (mapSize.w - this.map.paddingForPopups.right)) {
            newTL.x = mapSize.w - this.map.paddingForPopups.right - this.size.w;
        }
        
        //new top (compare to margins, using this.size to calculate bottom)
        if (origTL.y < this.map.paddingForPopups.top) {
            newTL.y = this.map.paddingForPopups.top;
        } else 
        if ( (origTL.y + this.size.h) > (mapSize.h - this.map.paddingForPopups.bottom)) {
            newTL.y = mapSize.h - this.map.paddingForPopups.bottom - this.size.h;
        }
        
        var dx = origTL.x - newTL.x;
        var dy = origTL.y - newTL.y;
        
        this.map.pan(dx, dy);
    },

    /** 
     * Method: registerEvents
     * Registers events on the popup.
     *
     * Do this in a separate function so that subclasses can 
     *   choose to override it if they wish to deal differently
     *   with mouse events
     * 
     *   Note in the following handler functions that some special
     *    care is needed to deal correctly with mousing and popups. 
     *   
     *   Because the user might select the zoom-rectangle option and
     *    then drag it over a popup, we need a safe way to allow the
     *    mousemove and mouseup events to pass through the popup when
     *    they are initiated from outside. The same procedure is needed for
     *    touchmove and touchend events.
     * 
     *   Otherwise, we want to essentially kill the event propagation
     *    for all other events, though we have to do so carefully, 
     *    without disabling basic html functionality, like clicking on 
     *    hyperlinks or drag-selecting text.
     */
     registerEvents:function() {
        this.events = new OpenLayers.Events(this, this.div, null, true);

        function onTouchstart(evt) {
            OpenLayers.Event.stop(evt, true);
        }
        this.events.on({
            "mousedown": this.onmousedown,
            "mousemove": this.onmousemove,
            "mouseup": this.onmouseup,
            "click": this.onclick,
            "mouseout": this.onmouseout,
            "dblclick": this.ondblclick,
            "touchstart": onTouchstart,
            scope: this
        });
        
     },

    /** 
     * Method: onmousedown 
     * When mouse goes down within the popup, make a note of
     *   it locally, and then do not propagate the mousedown 
     *   (but do so safely so that user can select text inside)
     * 
     * Parameters:
     * evt - {Event} 
     */
    onmousedown: function (evt) {
        this.mousedown = true;
        OpenLayers.Event.stop(evt, true);
    },

    /** 
     * Method: onmousemove
     * If the drag was started within the popup, then 
     *   do not propagate the mousemove (but do so safely
     *   so that user can select text inside)
     * 
     * Parameters:
     * evt - {Event} 
     */
    onmousemove: function (evt) {
        if (this.mousedown) {
            OpenLayers.Event.stop(evt, true);
        }
    },

    /** 
     * Method: onmouseup
     * When mouse comes up within the popup, after going down 
     *   in it, reset the flag, and then (once again) do not 
     *   propagate the event, but do so safely so that user can 
     *   select text inside
     * 
     * Parameters:
     * evt - {Event} 
     */
    onmouseup: function (evt) {
        if (this.mousedown) {
            this.mousedown = false;
            OpenLayers.Event.stop(evt, true);
        }
    },

    /**
     * Method: onclick
     * Ignore clicks, but allowing default browser handling
     * 
     * Parameters:
     * evt - {Event} 
     */
    onclick: function (evt) {
        OpenLayers.Event.stop(evt, true);
    },

    /** 
     * Method: onmouseout
     * When mouse goes out of the popup set the flag to false so that
     *   if they let go and then drag back in, we won't be confused.
     * 
     * Parameters:
     * evt - {Event} 
     */
    onmouseout: function (evt) {
        this.mousedown = false;
    },
    
    /** 
     * Method: ondblclick
     * Ignore double-clicks, but allowing default browser handling
     * 
     * Parameters:
     * evt - {Event} 
     */
    ondblclick: function (evt) {
        OpenLayers.Event.stop(evt, true);
    },

    CLASS_NAME: "OpenLayers.Popup"
});

OpenLayers.Popup.WIDTH = 200;
OpenLayers.Popup.HEIGHT = 200;
OpenLayers.Popup.COLOR = "white";
OpenLayers.Popup.OPACITY = 1;
OpenLayers.Popup.BORDER = "0px";
/* ======================================================================
    OpenLayers/Popup/Anchored.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Popup.js
 */

/**
 * Class: OpenLayers.Popup.Anchored
 * 
 * Inherits from:
 *  - <OpenLayers.Popup>
 */
OpenLayers.Popup.Anchored = 
  OpenLayers.Class(OpenLayers.Popup, {

    /** 
     * Property: relativePosition
     * {String} Relative position of the popup ("br", "tr", "tl" or "bl").
     */
    relativePosition: null,
    
    /**
     * APIProperty: keepInMap 
     * {Boolean} If panMapIfOutOfView is false, and this property is true, 
     *     contrain the popup such that it always fits in the available map
     *     space. By default, this is set. If you are creating popups that are
     *     near map edges and not allowing pannning, and especially if you have
     *     a popup which has a fixedRelativePosition, setting this to false may
     *     be a smart thing to do.
     *   
     *     For anchored popups, default is true, since subclasses will
     *     usually want this functionality.
     */
    keepInMap: true,

    /**
     * Property: anchor
     * {Object} Object to which we'll anchor the popup. Must expose a 
     *     'size' (<OpenLayers.Size>) and 'offset' (<OpenLayers.Pixel>).
     */
    anchor: null,

    /** 
    * Constructor: OpenLayers.Popup.Anchored
    * 
    * Parameters:
    * id - {String}
    * lonlat - {<OpenLayers.LonLat>}
    * contentSize - {<OpenLayers.Size>}
    * contentHTML - {String}
    * anchor - {Object} Object which must expose a 'size' <OpenLayers.Size> 
    *     and 'offset' <OpenLayers.Pixel> (generally an <OpenLayers.Icon>).
    * closeBox - {Boolean}
    * closeBoxCallback - {Function} Function to be called on closeBox click.
    */
    initialize:function(id, lonlat, contentSize, contentHTML, anchor, closeBox,
                        closeBoxCallback) {
        var newArguments = [
            id, lonlat, contentSize, contentHTML, closeBox, closeBoxCallback
        ];
        OpenLayers.Popup.prototype.initialize.apply(this, newArguments);

        this.anchor = (anchor != null) ? anchor 
                                       : { size: new OpenLayers.Size(0,0),
                                           offset: new OpenLayers.Pixel(0,0)};
    },

    /**
     * APIMethod: destroy
     */
    destroy: function() {
        this.anchor = null;
        this.relativePosition = null;
        
        OpenLayers.Popup.prototype.destroy.apply(this, arguments);        
    },

    /**
     * APIMethod: show
     * Overridden from Popup since user might hide popup and then show() it 
     *     in a new location (meaning we might want to update the relative
     *     position on the show)
     */
    show: function() {
        this.updatePosition();
        OpenLayers.Popup.prototype.show.apply(this, arguments);
    },

    /**
     * Method: moveTo
     * Since the popup is moving to a new px, it might need also to be moved
     *     relative to where the marker is. We first calculate the new 
     *     relativePosition, and then we calculate the new px where we will 
     *     put the popup, based on the new relative position. 
     * 
     *     If the relativePosition has changed, we must also call 
     *     updateRelativePosition() to make any visual changes to the popup 
     *     which are associated with putting it in a new relativePosition.
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     */
    moveTo: function(px) {
        var oldRelativePosition = this.relativePosition;
        this.relativePosition = this.calculateRelativePosition(px);
        
        var newPx = this.calculateNewPx(px);
        
        var newArguments = new Array(newPx);        
        OpenLayers.Popup.prototype.moveTo.apply(this, newArguments);
        
        //if this move has caused the popup to change its relative position, 
        // we need to make the appropriate cosmetic changes.
        if (this.relativePosition != oldRelativePosition) {
            this.updateRelativePosition();
        }
    },

    /**
     * APIMethod: setSize
     * 
     * Parameters:
     * contentSize - {<OpenLayers.Size>} the new size for the popup's 
     *     contents div (in pixels).
     */
    setSize:function(contentSize) { 
        OpenLayers.Popup.prototype.setSize.apply(this, arguments);

        if ((this.lonlat) && (this.map)) {
            var px = this.map.getLayerPxFromLonLat(this.lonlat);
            this.moveTo(px);
        }
    },  
    
    /** 
     * Method: calculateRelativePosition
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {String} The relative position ("br" "tr" "tl" "bl") at which the popup
     *     should be placed.
     */
    calculateRelativePosition:function(px) {
        var lonlat = this.map.getLonLatFromLayerPx(px);        
        
        var extent = this.map.getExtent();
        var quadrant = extent.determineQuadrant(lonlat);
        
        return OpenLayers.Bounds.oppositeQuadrant(quadrant);
    }, 

    /**
     * Method: updateRelativePosition
     * The popup has been moved to a new relative location, so we may want to 
     *     make some cosmetic adjustments to it. 
     * 
     *     Note that in the classic Anchored popup, there is nothing to do 
     *     here, since the popup looks exactly the same in all four positions.
     *     Subclasses such as Framed, however, will want to do something
     *     special here.
     */
    updateRelativePosition: function() {
        //to be overridden by subclasses
    },

    /** 
     * Method: calculateNewPx
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {<OpenLayers.Pixel>} The the new px position of the popup on the screen
     *     relative to the passed-in px.
     */
    calculateNewPx:function(px) {
        var newPx = px.offset(this.anchor.offset);
        
        //use contentSize if size is not already set
        var size = this.size || this.contentSize;

        var top = (this.relativePosition.charAt(0) == 't');
        newPx.y += (top) ? -size.h : this.anchor.size.h;
        
        var left = (this.relativePosition.charAt(1) == 'l');
        newPx.x += (left) ? -size.w : this.anchor.size.w;

        return newPx;   
    },

    CLASS_NAME: "OpenLayers.Popup.Anchored"
});
/* ======================================================================
    Rico/license.js
   ====================================================================== */

/**
 * @license Apache 2 
 *  
 * Contains portions of Rico <http://openrico.org/>
 * 
 * Copyright 2005 Sabre Airline Solutions  
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You
 * may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0  
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License. 
 */
/* ======================================================================
    Rico/Color.js
   ====================================================================== */

/** 
 * @requires Rico/license.js
 * @requires OpenLayers/Console.js
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/BaseTypes/Element.js
 */


/*
 * This file has been edited substantially from the Rico-released version by
 * the OpenLayers development team.
 */

OpenLayers.Console.warn("OpenLayers.Rico is deprecated");

OpenLayers.Rico = OpenLayers.Rico || {};
OpenLayers.Rico.Color = OpenLayers.Class({

   initialize: function(red, green, blue) {
      this.rgb = { r: red, g : green, b : blue };
   },

   setRed: function(r) {
      this.rgb.r = r;
   },

   setGreen: function(g) {
      this.rgb.g = g;
   },

   setBlue: function(b) {
      this.rgb.b = b;
   },

   setHue: function(h) {

      // get an HSB model, and set the new hue...
      var hsb = this.asHSB();
      hsb.h = h;

      // convert back to RGB...
      this.rgb = OpenLayers.Rico.Color.HSBtoRGB(hsb.h, hsb.s, hsb.b);
   },

   setSaturation: function(s) {
      // get an HSB model, and set the new hue...
      var hsb = this.asHSB();
      hsb.s = s;

      // convert back to RGB and set values...
      this.rgb = OpenLayers.Rico.Color.HSBtoRGB(hsb.h, hsb.s, hsb.b);
   },

   setBrightness: function(b) {
      // get an HSB model, and set the new hue...
      var hsb = this.asHSB();
      hsb.b = b;

      // convert back to RGB and set values...
      this.rgb = OpenLayers.Rico.Color.HSBtoRGB( hsb.h, hsb.s, hsb.b );
   },

   darken: function(percent) {
      var hsb  = this.asHSB();
      this.rgb = OpenLayers.Rico.Color.HSBtoRGB(hsb.h, hsb.s, Math.max(hsb.b - percent,0));
   },

   brighten: function(percent) {
      var hsb  = this.asHSB();
      this.rgb = OpenLayers.Rico.Color.HSBtoRGB(hsb.h, hsb.s, Math.min(hsb.b + percent,1));
   },

   blend: function(other) {
      this.rgb.r = Math.floor((this.rgb.r + other.rgb.r)/2);
      this.rgb.g = Math.floor((this.rgb.g + other.rgb.g)/2);
      this.rgb.b = Math.floor((this.rgb.b + other.rgb.b)/2);
   },

   isBright: function() {
      var hsb = this.asHSB();
      return this.asHSB().b > 0.5;
   },

   isDark: function() {
      return ! this.isBright();
   },

   asRGB: function() {
      return "rgb(" + this.rgb.r + "," + this.rgb.g + "," + this.rgb.b + ")";
   },

   asHex: function() {
      return "#" + this.rgb.r.toColorPart() + this.rgb.g.toColorPart() + this.rgb.b.toColorPart();
   },

   asHSB: function() {
      return OpenLayers.Rico.Color.RGBtoHSB(this.rgb.r, this.rgb.g, this.rgb.b);
   },

   toString: function() {
      return this.asHex();
   }

});

OpenLayers.Rico.Color.createFromHex = function(hexCode) {
  if(hexCode.length==4) {
    var shortHexCode = hexCode; 
    var hexCode = '#';
    for(var i=1;i<4;i++) { 
        hexCode += (shortHexCode.charAt(i) + 
shortHexCode.charAt(i)); 
    }
  }
   if ( hexCode.indexOf('#') == 0 ) {
       hexCode = hexCode.substring(1);
   }
   var red   = hexCode.substring(0,2);
   var green = hexCode.substring(2,4);
   var blue  = hexCode.substring(4,6);
   return new OpenLayers.Rico.Color( parseInt(red,16), parseInt(green,16), parseInt(blue,16) );
};

/**
 * Factory method for creating a color from the background of
 * an HTML element.
 */
OpenLayers.Rico.Color.createColorFromBackground = function(elem) {

   var actualColor = 
      OpenLayers.Element.getStyle(OpenLayers.Util.getElement(elem), 
                                        "backgroundColor");

   if ( actualColor == "transparent" && elem.parentNode ) {
      return OpenLayers.Rico.Color.createColorFromBackground(elem.parentNode);
   }
   if ( actualColor == null ) {
      return new OpenLayers.Rico.Color(255,255,255);
   }
   if ( actualColor.indexOf("rgb(") == 0 ) {
      var colors = actualColor.substring(4, actualColor.length - 1 );
      var colorArray = colors.split(",");
      return new OpenLayers.Rico.Color( parseInt( colorArray[0] ),
                            parseInt( colorArray[1] ),
                            parseInt( colorArray[2] )  );

   }
   else if ( actualColor.indexOf("#") == 0 ) {
      return OpenLayers.Rico.Color.createFromHex(actualColor);
   }
   else {
      return new OpenLayers.Rico.Color(255,255,255);
   }
};

OpenLayers.Rico.Color.HSBtoRGB = function(hue, saturation, brightness) {

   var red   = 0;
    var green = 0;
    var blue  = 0;

   if (saturation == 0) {
      red = parseInt(brightness * 255.0 + 0.5);
       green = red;
       blue = red;
    }
    else {
      var h = (hue - Math.floor(hue)) * 6.0;
      var f = h - Math.floor(h);
      var p = brightness * (1.0 - saturation);
      var q = brightness * (1.0 - saturation * f);
      var t = brightness * (1.0 - (saturation * (1.0 - f)));

      switch (parseInt(h)) {
         case 0:
            red   = (brightness * 255.0 + 0.5);
            green = (t * 255.0 + 0.5);
            blue  = (p * 255.0 + 0.5);
            break;
         case 1:
            red   = (q * 255.0 + 0.5);
            green = (brightness * 255.0 + 0.5);
            blue  = (p * 255.0 + 0.5);
            break;
         case 2:
            red   = (p * 255.0 + 0.5);
            green = (brightness * 255.0 + 0.5);
            blue  = (t * 255.0 + 0.5);
            break;
         case 3:
            red   = (p * 255.0 + 0.5);
            green = (q * 255.0 + 0.5);
            blue  = (brightness * 255.0 + 0.5);
            break;
         case 4:
            red   = (t * 255.0 + 0.5);
            green = (p * 255.0 + 0.5);
            blue  = (brightness * 255.0 + 0.5);
            break;
          case 5:
            red   = (brightness * 255.0 + 0.5);
            green = (p * 255.0 + 0.5);
            blue  = (q * 255.0 + 0.5);
            break;
        }
    }

   return { r : parseInt(red), g : parseInt(green) , b : parseInt(blue) };
};

OpenLayers.Rico.Color.RGBtoHSB = function(r, g, b) {

   var hue;
   var saturation;
   var brightness;

   var cmax = (r > g) ? r : g;
   if (b > cmax) {
      cmax = b;
   }
   var cmin = (r < g) ? r : g;
   if (b < cmin) {
      cmin = b;
   }
   brightness = cmax / 255.0;
   if (cmax != 0) {
      saturation = (cmax - cmin)/cmax;
   } else {
      saturation = 0;
   }
   if (saturation == 0) {
      hue = 0;
   } else {
      var redc   = (cmax - r)/(cmax - cmin);
        var greenc = (cmax - g)/(cmax - cmin);
        var bluec  = (cmax - b)/(cmax - cmin);

        if (r == cmax) {
           hue = bluec - greenc;
        } else if (g == cmax) {
           hue = 2.0 + redc - bluec;
      } else {
           hue = 4.0 + greenc - redc;
      }
        hue = hue / 6.0;
        if (hue < 0) {
           hue = hue + 1.0;
        }
   }

   return { h : hue, s : saturation, b : brightness };
};

/* ======================================================================
    Rico/Corner.js
   ====================================================================== */

/**
 * @requires OpenLayers/Console.js
 * @requires Rico/Color.js
 */


/*
 * This file has been edited substantially from the Rico-released
 * version by the OpenLayers development team.
 *  
 *  Copyright 2005 Sabre Airline Solutions  
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the
 *  License. You may obtain a copy of the License at
 *  
 *         http://www.apache.org/licenses/LICENSE-2.0  
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the * License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, * either express or
 * implied. See the License for the specific language governing
 * permissions * and limitations under the License.
 *
 */

OpenLayers.Console.warn("OpenLayers.Rico is deprecated");

OpenLayers.Rico = OpenLayers.Rico || {};
OpenLayers.Rico.Corner = {

    round: function(e, options) {
        e = OpenLayers.Util.getElement(e);
        this._setOptions(options);

        var color = this.options.color;
        if ( this.options.color == "fromElement" ) {
            color = this._background(e);
        }
        var bgColor = this.options.bgColor;
        if ( this.options.bgColor == "fromParent" ) {
            bgColor = this._background(e.offsetParent);
        }
        this._roundCornersImpl(e, color, bgColor);
    },

    /**   This is a helper function to change the background
    *     color of <div> that has had Rico rounded corners added.
    *
    *     It seems we cannot just set the background color for the
    *     outer <div> so each <span> element used to create the
    *     corners must have its background color set individually.
    *
    * @param {DOM} theDiv - A child of the outer <div> that was
    *                        supplied to the `round` method.
    *
    * @param {String} newColor - The new background color to use.
    */
    changeColor: function(theDiv, newColor) {
   
        theDiv.style.backgroundColor = newColor;

        var spanElements = theDiv.parentNode.getElementsByTagName("span");
        
        for (var currIdx = 0; currIdx < spanElements.length; currIdx++) {
            spanElements[currIdx].style.backgroundColor = newColor;
        }
    }, 


    /**   This is a helper function to change the background
    *     opacity of <div> that has had Rico rounded corners added.
    *
    *     See changeColor (above) for algorithm explanation
    *
    * @param {DOM} theDiv A child of the outer <div> that was
    *                        supplied to the `round` method.
    *
    * @param {int} newOpacity The new opacity to use (0-1).
    */
    changeOpacity: function(theDiv, newOpacity) {
   
        var mozillaOpacity = newOpacity;
        var ieOpacity = 'alpha(opacity=' + newOpacity * 100 + ')';
        
        theDiv.style.opacity = mozillaOpacity;
        theDiv.style.filter = ieOpacity;

        var spanElements = theDiv.parentNode.getElementsByTagName("span");
        
        for (var currIdx = 0; currIdx < spanElements.length; currIdx++) {
            spanElements[currIdx].style.opacity = mozillaOpacity;
            spanElements[currIdx].style.filter = ieOpacity;
        }

    },

    /** this function takes care of redoing the rico cornering
    *    
    *    you can't just call updateRicoCorners() again and pass it a 
    *    new options string. you have to first remove the divs that 
    *    rico puts on top and below the content div.
    *
    * @param {DOM} theDiv - A child of the outer <div> that was
    *                        supplied to the `round` method.
    *
    * @param {Object} options - list of options
    */
    reRound: function(theDiv, options) {

        var topRico = theDiv.parentNode.childNodes[0];
        //theDiv would be theDiv.parentNode.childNodes[1]
        var bottomRico = theDiv.parentNode.childNodes[2];
       
        theDiv.parentNode.removeChild(topRico);
        theDiv.parentNode.removeChild(bottomRico); 

        this.round(theDiv.parentNode, options);
    }, 

   _roundCornersImpl: function(e, color, bgColor) {
      if(this.options.border) {
         this._renderBorder(e,bgColor);
      }
      if(this._isTopRounded()) {
         this._roundTopCorners(e,color,bgColor);
      }
      if(this._isBottomRounded()) {
         this._roundBottomCorners(e,color,bgColor);
      }
   },

   _renderBorder: function(el,bgColor) {
      var borderValue = "1px solid " + this._borderColor(bgColor);
      var borderL = "border-left: "  + borderValue;
      var borderR = "border-right: " + borderValue;
      var style   = "style='" + borderL + ";" + borderR +  "'";
      el.innerHTML = "<div " + style + ">" + el.innerHTML + "</div>";
   },

   _roundTopCorners: function(el, color, bgColor) {
      var corner = this._createCorner(bgColor);
      for(var i=0 ; i < this.options.numSlices ; i++ ) {
         corner.appendChild(this._createCornerSlice(color,bgColor,i,"top"));
      }
      el.style.paddingTop = 0;
      el.insertBefore(corner,el.firstChild);
   },

   _roundBottomCorners: function(el, color, bgColor) {
      var corner = this._createCorner(bgColor);
      for(var i=(this.options.numSlices-1) ; i >= 0 ; i-- ) {
         corner.appendChild(this._createCornerSlice(color,bgColor,i,"bottom"));
      }
      el.style.paddingBottom = 0;
      el.appendChild(corner);
   },

   _createCorner: function(bgColor) {
      var corner = document.createElement("div");
      corner.style.backgroundColor = (this._isTransparent() ? "transparent" : bgColor);
      return corner;
   },

   _createCornerSlice: function(color,bgColor, n, position) {
      var slice = document.createElement("span");

      var inStyle = slice.style;
      inStyle.backgroundColor = color;
      inStyle.display  = "block";
      inStyle.height   = "1px";
      inStyle.overflow = "hidden";
      inStyle.fontSize = "1px";

      var borderColor = this._borderColor(color,bgColor);
      if ( this.options.border && n == 0 ) {
         inStyle.borderTopStyle    = "solid";
         inStyle.borderTopWidth    = "1px";
         inStyle.borderLeftWidth   = "0px";
         inStyle.borderRightWidth  = "0px";
         inStyle.borderBottomWidth = "0px";
         inStyle.height            = "0px"; // assumes css compliant box model
         inStyle.borderColor       = borderColor;
      }
      else if(borderColor) {
         inStyle.borderColor = borderColor;
         inStyle.borderStyle = "solid";
         inStyle.borderWidth = "0px 1px";
      }

      if ( !this.options.compact && (n == (this.options.numSlices-1)) ) {
         inStyle.height = "2px";
      }
      this._setMargin(slice, n, position);
      this._setBorder(slice, n, position);
      return slice;
   },

   _setOptions: function(options) {
      this.options = {
         corners : "all",
         color   : "fromElement",
         bgColor : "fromParent",
         blend   : true,
         border  : false,
         compact : false
      };
      OpenLayers.Util.extend(this.options, options || {});

      this.options.numSlices = this.options.compact ? 2 : 4;
      if ( this._isTransparent() ) {
         this.options.blend = false;
      }
   },

   _whichSideTop: function() {
      if ( this._hasString(this.options.corners, "all", "top") ) {
         return "";
      }
      if ( this.options.corners.indexOf("tl") >= 0 && this.options.corners.indexOf("tr") >= 0 ) {
         return "";
      }
      if (this.options.corners.indexOf("tl") >= 0) {
         return "left";
      } else if (this.options.corners.indexOf("tr") >= 0) {
          return "right";
      }
      return "";
   },

   _whichSideBottom: function() {
      if ( this._hasString(this.options.corners, "all", "bottom") ) {
         return "";
      }
      if ( this.options.corners.indexOf("bl")>=0 && this.options.corners.indexOf("br")>=0 ) {
         return "";
      }

      if(this.options.corners.indexOf("bl") >=0) {
         return "left";
      } else if(this.options.corners.indexOf("br")>=0) {
         return "right";
      }
      return "";
   },

   _borderColor : function(color,bgColor) {
      if ( color == "transparent" ) {
         return bgColor;
      } else if ( this.options.border ) {
         return this.options.border;
      } else if ( this.options.blend ) {
         return this._blend( bgColor, color );
      } else {
         return "";
      }
   },


   _setMargin: function(el, n, corners) {
      var marginSize = this._marginSize(n);
      var whichSide = corners == "top" ? this._whichSideTop() : this._whichSideBottom();

      if ( whichSide == "left" ) {
         el.style.marginLeft = marginSize + "px"; el.style.marginRight = "0px";
      }
      else if ( whichSide == "right" ) {
         el.style.marginRight = marginSize + "px"; el.style.marginLeft  = "0px";
      }
      else {
         el.style.marginLeft = marginSize + "px"; el.style.marginRight = marginSize + "px";
      }
   },

   _setBorder: function(el,n,corners) {
      var borderSize = this._borderSize(n);
      var whichSide = corners == "top" ? this._whichSideTop() : this._whichSideBottom();
      if ( whichSide == "left" ) {
         el.style.borderLeftWidth = borderSize + "px"; el.style.borderRightWidth = "0px";
      }
      else if ( whichSide == "right" ) {
         el.style.borderRightWidth = borderSize + "px"; el.style.borderLeftWidth  = "0px";
      }
      else {
         el.style.borderLeftWidth = borderSize + "px"; el.style.borderRightWidth = borderSize + "px";
      }
      if (this.options.border != false) {
        el.style.borderLeftWidth = borderSize + "px"; el.style.borderRightWidth = borderSize + "px";
      }
   },

   _marginSize: function(n) {
      if ( this._isTransparent() ) {
         return 0;
      }
      var marginSizes          = [ 5, 3, 2, 1 ];
      var blendedMarginSizes   = [ 3, 2, 1, 0 ];
      var compactMarginSizes   = [ 2, 1 ];
      var smBlendedMarginSizes = [ 1, 0 ];

      if ( this.options.compact && this.options.blend ) {
         return smBlendedMarginSizes[n];
      } else if ( this.options.compact ) {
         return compactMarginSizes[n];
      } else if ( this.options.blend ) {
         return blendedMarginSizes[n];
      } else {
         return marginSizes[n];
      }
   },

   _borderSize: function(n) {
      var transparentBorderSizes = [ 5, 3, 2, 1 ];
      var blendedBorderSizes     = [ 2, 1, 1, 1 ];
      var compactBorderSizes     = [ 1, 0 ];
      var actualBorderSizes      = [ 0, 2, 0, 0 ];

      if ( this.options.compact && (this.options.blend || this._isTransparent()) ) {
         return 1;
      } else if ( this.options.compact ) {
         return compactBorderSizes[n];
      } else if ( this.options.blend ) {
         return blendedBorderSizes[n];
      } else if ( this.options.border ) {
         return actualBorderSizes[n];
      } else if ( this._isTransparent() ) {
         return transparentBorderSizes[n];
      }
      return 0;
   },

   _hasString: function(str) { for(var i=1 ; i<arguments.length ; i++) if (str.indexOf(arguments[i]) >= 0) { return true; } return false; },
   _blend: function(c1, c2) { var cc1 = OpenLayers.Rico.Color.createFromHex(c1); cc1.blend(OpenLayers.Rico.Color.createFromHex(c2)); return cc1; },
   _background: function(el) { try { return OpenLayers.Rico.Color.createColorFromBackground(el).asHex(); } catch(err) { return "#ffffff"; } },
   _isTransparent: function() { return this.options.color == "transparent"; },
   _isTopRounded: function() { return this._hasString(this.options.corners, "all", "top", "tl", "tr"); },
   _isBottomRounded: function() { return this._hasString(this.options.corners, "all", "bottom", "bl", "br"); },
   _hasSingleTextChild: function(el) { return el.childNodes.length == 1 && el.childNodes[0].nodeType == 3; }
};
/* ======================================================================
    OpenLayers/Popup/AnchoredBubble.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Popup/Anchored.js
 * @requires OpenLayers/Console.js
 * @requires Rico/Corner.js
 */

/**
 * Class: OpenLayers.Popup.AnchoredBubble
 * This class is *deprecated*. Use {<OpenLayers.Popup.Anchored>} and
 * round corners using CSS3's border-radius property.
 * 
 * Inherits from: 
 *  - <OpenLayers.Popup.Anchored>
 */
OpenLayers.Popup.AnchoredBubble = 
  OpenLayers.Class(OpenLayers.Popup.Anchored, {

    /**
     * Property: rounded
     * {Boolean} Has the popup been rounded yet?
     */
    rounded: false, 
    
    /** 
     * Constructor: OpenLayers.Popup.AnchoredBubble
     * 
     * Parameters:
     * id - {String}
     * lonlat - {<OpenLayers.LonLat>}
     * contentSize - {<OpenLayers.Size>}
     * contentHTML - {String}
     * anchor - {Object} Object to which we'll anchor the popup. Must expose 
     *     a 'size' (<OpenLayers.Size>) and 'offset' (<OpenLayers.Pixel>) 
     *     (Note that this is generally an <OpenLayers.Icon>).
     * closeBox - {Boolean}
     * closeBoxCallback - {Function} Function to be called on closeBox click.
     */
    initialize:function(id, lonlat, contentSize, contentHTML, anchor, closeBox,
                        closeBoxCallback) {

        OpenLayers.Console.warn('AnchoredBubble is deprecated');
        
        this.padding = new OpenLayers.Bounds(
            0, OpenLayers.Popup.AnchoredBubble.CORNER_SIZE,
            0, OpenLayers.Popup.AnchoredBubble.CORNER_SIZE
        );
        OpenLayers.Popup.Anchored.prototype.initialize.apply(this, arguments);
    },

    /** 
     * Method: draw
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {DOMElement} Reference to a div that contains the drawn popup.
     */
    draw: function(px) {
        
        OpenLayers.Popup.Anchored.prototype.draw.apply(this, arguments);

        this.setContentHTML();
        
        //set the popup color and opacity           
        this.setBackgroundColor(); 
        this.setOpacity();

        return this.div;
    },

    /**
     * Method: updateRelativePosition
     * The popup has been moved to a new relative location, in which case
     *     we will want to re-do the rico corners.
     */
    updateRelativePosition: function() {
        this.setRicoCorners();
    },

    /**
     * APIMethod: setSize
     * 
     * Parameters:
     * contentSize - {<OpenLayers.Size>} the new size for the popup's 
     *     contents div (in pixels).
     */
    setSize:function(contentSize) { 
        OpenLayers.Popup.Anchored.prototype.setSize.apply(this, arguments);

        this.setRicoCorners();
    },  

    /**
     * APIMethod: setBackgroundColor
     * 
     * Parameters:
     * color - {String}
     */
    setBackgroundColor:function(color) { 
        if (color != undefined) {
            this.backgroundColor = color; 
        }
        
        if (this.div != null) {
            if (this.contentDiv != null) {
                this.div.style.background = "transparent";
                OpenLayers.Rico.Corner.changeColor(this.groupDiv, 
                                                   this.backgroundColor);
            }
        }
    },  
    
    /**
     * APIMethod: setOpacity
     * 
     * Parameters: 
     * opacity - {float}
     */
    setOpacity:function(opacity) { 
        OpenLayers.Popup.Anchored.prototype.setOpacity.call(this, opacity);
        
        if (this.div != null) {
            if (this.groupDiv != null) {
                OpenLayers.Rico.Corner.changeOpacity(this.groupDiv, 
                                                     this.opacity);
            }
        }
    },  
 
    /** 
     * Method: setBorder
     * Always sets border to 0. Bubble Popups can not have a border.
     * 
     * Parameters:
     * border - {Integer}
     */
    setBorder:function(border) { 
        this.border = 0;
    },      
 
    /** 
     * Method: setRicoCorners
     * Update RICO corners according to the popup's current relative postion.
     */
    setRicoCorners:function() {
    
        var corners = this.getCornersToRound(this.relativePosition);
        var options = {corners: corners,
                         color: this.backgroundColor,
                       bgColor: "transparent",
                         blend: false};

        if (!this.rounded) {
            OpenLayers.Rico.Corner.round(this.div, options);
            this.rounded = true;
        } else {
            OpenLayers.Rico.Corner.reRound(this.groupDiv, options);
            //set the popup color and opacity
            this.setBackgroundColor(); 
            this.setOpacity();
        }
    },

    /** 
     * Method: getCornersToRound
     *  
     * Returns:
     * {String} The proper corners string ("tr tl bl br") for rico to round.
     */
    getCornersToRound:function() {

        var corners = ['tl', 'tr', 'bl', 'br'];

        //we want to round all the corners _except_ the opposite one. 
        var corner = OpenLayers.Bounds.oppositeQuadrant(this.relativePosition);
        OpenLayers.Util.removeItem(corners, corner);

        return corners.join(" ");
    },

    CLASS_NAME: "OpenLayers.Popup.AnchoredBubble"
});

/**
 * Constant: CORNER_SIZE
 * {Integer} 5. Border space for the RICO corners.
 */
OpenLayers.Popup.AnchoredBubble.CORNER_SIZE = 5;

/* ======================================================================
    OpenLayers/Protocol/WFS/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol/WFS.js
 */

/**
 * Class: OpenLayers.Protocol.WFS.v1
 * Abstract class for for v1.0.0 and v1.1.0 protocol.
 *
 * Inherits from:
 *  - <OpenLayers.Protocol>
 */
OpenLayers.Protocol.WFS.v1 = OpenLayers.Class(OpenLayers.Protocol, {
    
    /**
     * Property: version
     * {String} WFS version number.
     */
    version: null,
    
    /**
     * Property: srsName
     * {String} Name of spatial reference system.  Default is "EPSG:4326".
     */
    srsName: "EPSG:4326",
    
    /**
     * Property: featureType
     * {String} Local feature typeName.
     */
    featureType: null,
    
    /**
     * Property: featureNS
     * {String} Feature namespace.
     */
    featureNS: null,
    
    /**
     * Property: geometryName
     * {String} Name of the geometry attribute for features.  Default is
     *     "the_geom" for WFS <version> 1.0, and null for higher versions.
     */
    geometryName: "the_geom",
    
    /**
     * Property: schema
     * {String} Optional schema location that will be included in the
     *     schemaLocation attribute value.  Note that the feature type schema
     *     is required for a strict XML validator (on transactions with an
     *     insert for example), but is *not* required by the WFS specification
     *     (since the server is supposed to know about feature type schemas).
     */
    schema: null,

    /**
     * Property: featurePrefix
     * {String} Namespace alias for feature type.  Default is "feature".
     */
    featurePrefix: "feature",
    
    /**
     * Property: formatOptions
     * {Object} Optional options for the format.  If a format is not provided,
     *     this property can be used to extend the default format options.
     */
    formatOptions: null,

    /** 
     * Property: readFormat 
     * {<OpenLayers.Format>} For WFS requests it is possible to get a  
     *     different output format than GML. In that case, we cannot parse  
     *     the response with the default format (WFST) and we need a different 
     *     format for reading. 
     */ 
    readFormat: null,
    
    /**
     * Property: readOptions
     * {Object} Optional object to pass to format's read.
     */
    readOptions: null,
    
    /**
     * Constructor: OpenLayers.Protocol.WFS
     * A class for giving layers WFS protocol.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * url - {String} URL to send requests to (required).
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (required, but can be autodetected
     *     during the first query if GML is used as readFormat and
     *     featurePrefix is provided and matches the prefix used by the server
     *     for this featureType).
     * featurePrefix - {String} Feature namespace alias (optional - only used
     *     for writing if featureNS is provided).  Default is 'feature'.
     * geometryName - {String} Name of geometry attribute.  The default is
     *     'the_geom' for WFS <version> 1.0, and null for higher versions. If
     *     null, it will be set to the name of the first geometry found in the
     *     first read operation.
     * multi - {Boolean} If set to true, geometries will be casted to Multi
     *     geometries before they are written in a transaction. No casting will
     *     be done when reading features.
     */
    initialize: function(options) {
        OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
        if(!options.format) {
            this.format = OpenLayers.Format.WFST(OpenLayers.Util.extend({
                version: this.version,
                featureType: this.featureType,
                featureNS: this.featureNS,
                featurePrefix: this.featurePrefix,
                geometryName: this.geometryName,
                srsName: this.srsName,
                schema: this.schema
            }, this.formatOptions));
        }
        if (!options.geometryName && parseFloat(this.format.version) > 1.0) {
            this.setGeometryName(null);
        }
    },
    
    /**
     * APIMethod: destroy
     * Clean up the protocol.
     */
    destroy: function() {
        if(this.options && !this.options.format) {
            this.format.destroy();
        }
        this.format = null;
        OpenLayers.Protocol.prototype.destroy.apply(this);
    },

    /**
     * APIMethod: read
     * Construct a request for reading new features.  Since WFS splits the
     *     basic CRUD operations into GetFeature requests (for read) and
     *     Transactions (for all others), this method does not make use of the
     *     format's read method (that is only about reading transaction
     *     responses).
     *
     * Parameters:
     * options - {Object} Options for the read operation, in addition to the
     *     options set on the instance (options set here will take precedence).
     *
     * To use a configured protocol to get e.g. a WFS hit count, applications
     * could do the following:
     *
     * (code)
     * protocol.read({
     *     readOptions: {output: "object"},
     *     resultType: "hits",
     *     maxFeatures: null,
     *     callback: function(resp) {
     *         // process resp.numberOfFeatures here
     *     }
     * });
     * (end)
     *
     * To use a configured protocol to use WFS paging (if supported by the
     * server), applications could do the following:
     *
     * (code)
     * protocol.read({
     *     startIndex: 0,
     *     count: 50
     * });
     * (end)
     *
     * To limit the attributes returned by the GetFeature request, applications
     * can use the propertyNames option to specify the properties to include in
     * the response:
     *
     * (code)
     * protocol.read({
     *     propertyNames: ["DURATION", "INTENSITY"]
     * });
     * (end)
     */
    read: function(options) {
        OpenLayers.Protocol.prototype.read.apply(this, arguments);
        options = OpenLayers.Util.extend({}, options);
        OpenLayers.Util.applyDefaults(options, this.options || {});
        var response = new OpenLayers.Protocol.Response({requestType: "read"});
        
        var data = OpenLayers.Format.XML.prototype.write.apply(
            this.format, [this.format.writeNode("wfs:GetFeature", options)]
        );

        response.priv = OpenLayers.Request.POST({
            url: options.url,
            callback: this.createCallback(this.handleRead, response, options),
            params: options.params,
            headers: options.headers,
            data: data
        });

        return response;
    },

    /**
     * APIMethod: setFeatureType
     * Change the feature type on the fly.
     *
     * Parameters:
     * featureType - {String} Local (without prefix) feature typeName.
     */
    setFeatureType: function(featureType) {
        this.featureType = featureType;
        this.format.featureType = featureType;
    },
 
    /**
     * APIMethod: setGeometryName
     * Sets the geometryName option after instantiation.
     *
     * Parameters:
     * geometryName - {String} Name of geometry attribute.
     */
    setGeometryName: function(geometryName) {
        this.geometryName = geometryName;
        this.format.geometryName = geometryName;
    },
    
    /**
     * Method: handleRead
     * Deal with response from the read request.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object to pass
     *     to the user callback.
     * options - {Object} The user options passed to the read call.
     */
    handleRead: function(response, options) {
        options = OpenLayers.Util.extend({}, options);
        OpenLayers.Util.applyDefaults(options, this.options);

        if(options.callback) {
            var request = response.priv;
            if(request.status >= 200 && request.status < 300) {
                // success
                var result = this.parseResponse(request, options.readOptions);
                if (result && result.success !== false) { 
                    if (options.readOptions && options.readOptions.output == "object") {
                        OpenLayers.Util.extend(response, result);
                    } else {
                        response.features = result;
                    }
                    response.code = OpenLayers.Protocol.Response.SUCCESS;
                } else {
                    // failure (service exception)
                    response.code = OpenLayers.Protocol.Response.FAILURE;
                    response.error = result;
                }
            } else {
                // failure
                response.code = OpenLayers.Protocol.Response.FAILURE;
            }
            options.callback.call(options.scope, response);
        }
    },

    /**
     * Method: parseResponse
     * Read HTTP response body and return features
     *
     * Parameters:
     * request - {XMLHttpRequest} The request object
     * options - {Object} Optional object to pass to format's read
     *
     * Returns:
     * {Object} or {Array({<OpenLayers.Feature.Vector>})} or
     *     {<OpenLayers.Feature.Vector>} 
     * An object with a features property, an array of features or a single 
     * feature.
     */
    parseResponse: function(request, options) {
        var doc = request.responseXML;
        if(!doc || !doc.documentElement) {
            doc = request.responseText;
        }
        if(!doc || doc.length <= 0) {
            return null;
        }
        var result = (this.readFormat !== null) ? this.readFormat.read(doc) : 
            this.format.read(doc, options);
        if (!this.featureNS) {
            var format = this.readFormat || this.format;
            this.featureNS = format.featureNS;
            // no need to auto-configure again on subsequent reads
            format.autoConfig = false;
            if (!this.geometryName) {
                this.setGeometryName(format.geometryName);
            }
        }
        return result;
    },

    /**
     * Method: commit
     * Given a list of feature, assemble a batch request for update, create,
     *     and delete transactions.  A commit call on the prototype amounts
     *     to writing a WFS transaction - so the write method on the format
     *     is used.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)}
     * options - {Object}
     *
     * Valid options properties:
     * nativeElements - {Array({Object})} Array of objects with information for writing
     * out <Native> elements, these objects have vendorId, safeToIgnore and
     * value properties. The <Native> element is intended to allow access to 
     * vendor specific capabilities of any particular web feature server or 
     * datastore.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} A response object with a features
     *     property containing any insertIds and a priv property referencing
     *     the XMLHttpRequest object.
     */
    commit: function(features, options) {

        options = OpenLayers.Util.extend({}, options);
        OpenLayers.Util.applyDefaults(options, this.options);
        
        var response = new OpenLayers.Protocol.Response({
            requestType: "commit",
            reqFeatures: features
        });
        response.priv = OpenLayers.Request.POST({
            url: options.url,
            headers: options.headers,
            data: this.format.write(features, options),
            callback: this.createCallback(this.handleCommit, response, options)
        });
        
        return response;
    },
    
    /**
     * Method: handleCommit
     * Called when the commit request returns.
     * 
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object to pass
     *     to the user callback.
     * options - {Object} The user options passed to the commit call.
     */
    handleCommit: function(response, options) {
        if(options.callback) {
            var request = response.priv;

            // ensure that we have an xml doc
            var data = request.responseXML;
            if(!data || !data.documentElement) {
                data = request.responseText;
            }
            
            var obj = this.format.read(data) || {};
            
            response.insertIds = obj.insertIds || [];
            if (obj.success) {
                response.code = OpenLayers.Protocol.Response.SUCCESS;
            } else {
                response.code = OpenLayers.Protocol.Response.FAILURE;
                response.error = obj;
            }
            options.callback.call(options.scope, response);
        }
    },
    
    /**
     * Method: filterDelete
     * Send a request that deletes all features by their filter.
     * 
     * Parameters:
     * filter - {<OpenLayers.Filter>} filter
     */
    filterDelete: function(filter, options) {
        options = OpenLayers.Util.extend({}, options);
        OpenLayers.Util.applyDefaults(options, this.options);    
        
        var response = new OpenLayers.Protocol.Response({
            requestType: "commit"
        });    
        
        var root = this.format.createElementNSPlus("wfs:Transaction", {
            attributes: {
                service: "WFS",
                version: this.version
            }
        });
        
        var deleteNode = this.format.createElementNSPlus("wfs:Delete", {
            attributes: {
                typeName: (options.featureNS ? this.featurePrefix + ":" : "") +
                    options.featureType
            }
        });       
        
        if(options.featureNS) {
            deleteNode.setAttribute("xmlns:" + this.featurePrefix, options.featureNS);
        }
        var filterNode = this.format.writeNode("ogc:Filter", filter);
        
        deleteNode.appendChild(filterNode);
        
        root.appendChild(deleteNode);
        
        var data = OpenLayers.Format.XML.prototype.write.apply(
            this.format, [root]
        );
        
        return OpenLayers.Request.POST({
            url: this.url,
            callback : options.callback || function(){},
            data: data
        });   
        
    },

    /**
     * Method: abort
     * Abort an ongoing request, the response object passed to
     * this method must come from this protocol (as a result
     * of a read, or commit operation).
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>}
     */
    abort: function(response) {
        if (response) {
            response.priv.abort();
        }
    },
  
    CLASS_NAME: "OpenLayers.Protocol.WFS.v1" 
});
/* ======================================================================
    OpenLayers/Handler/Point.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler.js
 * @requires OpenLayers/Geometry/Point.js
 */

/**
 * Class: OpenLayers.Handler.Point
 * Handler to draw a point on the map. Point is displayed on activation,
 *     moves on mouse move, and is finished on mouse up. The handler triggers
 *     callbacks for 'done', 'cancel', and 'modify'. The modify callback is
 *     called with each change in the sketch and will receive the latest point
 *     drawn.  Create a new instance with the <OpenLayers.Handler.Point>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
    
    /**
     * Property: point
     * {<OpenLayers.Feature.Vector>} The currently drawn point
     */
    point: null,

    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>} The temporary drawing layer
     */
    layer: null,
    
    /**
     * APIProperty: multi
     * {Boolean} Cast features to multi-part geometries before passing to the
     *     layer.  Default is false.
     */
    multi: false,
    
    /**
     * APIProperty: citeCompliant
     * {Boolean} If set to true, coordinates of features drawn in a map extent
     * crossing the date line won't exceed the world bounds. Default is false.
     */
    citeCompliant: false,
    
    /**
     * Property: mouseDown
     * {Boolean} The mouse is down
     */
    mouseDown: false,

    /**
     * Property: stoppedDown
     * {Boolean} Indicate whether the last mousedown stopped the event
     * propagation.
     */
    stoppedDown: null,

    /**
     * Property: lastDown
     * {<OpenLayers.Pixel>} Location of the last mouse down
     */
    lastDown: null,

    /**
     * Property: lastUp
     * {<OpenLayers.Pixel>}
     */
    lastUp: null,

    /**
     * APIProperty: persist
     * {Boolean} Leave the feature rendered until destroyFeature is called.
     *     Default is false.  If set to true, the feature remains rendered until
     *     destroyFeature is called, typically by deactivating the handler or
     *     starting another drawing.
     */
    persist: false,

    /**
     * APIProperty: stopDown
     * {Boolean} Stop event propagation on mousedown. Must be false to
     *     allow "pan while drawing". Defaults to false.
     */
    stopDown: false,

    /**
     * APIPropery: stopUp
     * {Boolean} Stop event propagation on mouse. Must be false to
     *     allow "pan while dragging". Defaults to fase.
     */
    stopUp: false,

    /**
     * Property: layerOptions
     * {Object} Any optional properties to be set on the sketch layer.
     */
    layerOptions: null,
    
    /**
     * APIProperty: pixelTolerance
     * {Number} Maximum number of pixels between down and up (mousedown
     *     and mouseup, or touchstart and touchend) for the handler to
     *     add a new point. If set to an integer value, if the
     *     displacement between down and up is great to this value
     *     no point will be added. Default value is 5.
     */
    pixelTolerance: 5,

    /**
     * Property: touch
     * {Boolean} Indcates the support of touch events.
     */
    touch: false,

    /**
     * Property: lastTouchPx
     * {<OpenLayers.Pixel>} The last pixel used to know the distance between
     * two touches (for double touch).
     */
    lastTouchPx: null,

    /**
     * Constructor: OpenLayers.Handler.Point
     * Create a new point handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that owns this handler
     * callbacks - {Object} An object with a properties whose values are
     *     functions.  Various callbacks described below.
     * options - {Object} An optional object with properties to be set on the
     *           handler
     *
     * Named callbacks:
     * create - Called when a sketch is first created.  Callback called with
     *     the creation point geometry and sketch feature.
     * modify - Called with each move of a vertex with the vertex (point)
     *     geometry and the sketch feature.
     * done - Called when the point drawing is finished.  The callback will
     *     recieve a single argument, the point geometry.
     * cancel - Called when the handler is deactivated while drawing.  The
     *     cancel callback will receive a geometry.
     */
    initialize: function(control, callbacks, options) {
        if(!(options && options.layerOptions && options.layerOptions.styleMap)) {
            this.style = OpenLayers.Util.extend(OpenLayers.Feature.Vector.style['default'], {});
        }

        OpenLayers.Handler.prototype.initialize.apply(this, arguments);
    },
    
    /**
     * APIMethod: activate
     * turn on the handler
     */
    activate: function() {
        if(!OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            return false;
        }
        // create temporary vector layer for rendering geometry sketch
        // TBD: this could be moved to initialize/destroy - setting visibility here
        var options = OpenLayers.Util.extend({
            displayInLayerSwitcher: false,
            // indicate that the temp vector layer will never be out of range
            // without this, resolution properties must be specified at the
            // map-level for this temporary layer to init its resolutions
            // correctly
            calculateInRange: OpenLayers.Function.True,
            wrapDateLine: this.citeCompliant
        }, this.layerOptions);
        this.layer = new OpenLayers.Layer.Vector(this.CLASS_NAME, options);
        this.map.addLayer(this.layer);
        return true;
    },
    
    /**
     * Method: createFeature
     * Add temporary features
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} A pixel location on the map.
     */
    createFeature: function(pixel) {
        var lonlat = this.layer.getLonLatFromViewPortPx(pixel); 
        var geometry = new OpenLayers.Geometry.Point(
            lonlat.lon, lonlat.lat
        );
        this.point = new OpenLayers.Feature.Vector(geometry);
        this.callback("create", [this.point.geometry, this.point]);
        this.point.geometry.clearBounds();
        this.layer.addFeatures([this.point], {silent: true});
    },

    /**
     * APIMethod: deactivate
     * turn off the handler
     */
    deactivate: function() {
        if(!OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            return false;
        }
        this.cancel();
        // If a layer's map property is set to null, it means that that layer
        // isn't added to the map. Since we ourself added the layer to the map
        // in activate(), we can assume that if this.layer.map is null it means
        // that the layer has been destroyed (as a result of map.destroy() for
        // example.
        if (this.layer.map != null) {
            this.destroyFeature(true);
            this.layer.destroy(false);
        }
        this.layer = null;
        this.touch = false;
        return true;
    },
    
    /**
     * Method: destroyFeature
     * Destroy the temporary geometries
     *
     * Parameters:
     * force - {Boolean} Destroy even if persist is true.
     */
    destroyFeature: function(force) {
        if(this.layer && (force || !this.persist)) {
            this.layer.destroyFeatures();
        }
        this.point = null;
    },

    /**
     * Method: destroyPersistedFeature
     * Destroy the persisted feature.
     */
    destroyPersistedFeature: function() {
        var layer = this.layer;
        if(layer && layer.features.length > 1) {
            this.layer.features[0].destroy();
        }
    },

    /**
     * Method: finalize
     * Finish the geometry and call the "done" callback.
     *
     * Parameters:
     * cancel - {Boolean} Call cancel instead of done callback.  Default
     *          is false.
     */
    finalize: function(cancel) {
        var key = cancel ? "cancel" : "done";
        this.mouseDown = false;
        this.lastDown = null;
        this.lastUp = null;
        this.lastTouchPx = null;
        this.callback(key, [this.geometryClone()]);
        this.destroyFeature(cancel);
    },

    /**
     * APIMethod: cancel
     * Finish the geometry and call the "cancel" callback.
     */
    cancel: function() {
        this.finalize(true);
    },

    /**
     * Method: click
     * Handle clicks.  Clicks are stopped from propagating to other listeners
     *     on map.events or other dom elements.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    click: function(evt) {
        OpenLayers.Event.stop(evt);
        return false;
    },

    /**
     * Method: dblclick
     * Handle double-clicks.  Double-clicks are stopped from propagating to other
     *     listeners on map.events or other dom elements.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    dblclick: function(evt) {
        OpenLayers.Event.stop(evt);
        return false;
    },
    
    /**
     * Method: modifyFeature
     * Modify the existing geometry given a pixel location.
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} A pixel location on the map.
     */
    modifyFeature: function(pixel) {
        if(!this.point) {
            this.createFeature(pixel);
        }
        var lonlat = this.layer.getLonLatFromViewPortPx(pixel); 
        this.point.geometry.x = lonlat.lon;
        this.point.geometry.y = lonlat.lat;
        this.callback("modify", [this.point.geometry, this.point, false]);
        this.point.geometry.clearBounds();
        this.drawFeature();
    },

    /**
     * Method: drawFeature
     * Render features on the temporary layer.
     */
    drawFeature: function() {
        this.layer.drawFeature(this.point, this.style);
    },
    
    /**
     * Method: getGeometry
     * Return the sketch geometry.  If <multi> is true, this will return
     *     a multi-part geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.Point>}
     */
    getGeometry: function() {
        var geometry = this.point && this.point.geometry;
        if(geometry && this.multi) {
            geometry = new OpenLayers.Geometry.MultiPoint([geometry]);
        }
        return geometry;
    },

    /**
     * Method: geometryClone
     * Return a clone of the relevant geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry>}
     */
    geometryClone: function() {
        var geom = this.getGeometry();
        return geom && geom.clone();
    },

    /**
     * Method: mousedown
     * Handle mousedown.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousedown: function(evt) {
        return this.down(evt);
    },

    /**
     * Method: touchstart
     * Handle touchstart.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    touchstart: function(evt) {
        if (!this.touch) {
            this.touch = true;
            // unregister mouse listeners
            this.map.events.un({
                mousedown: this.mousedown,
                mouseup: this.mouseup,
                mousemove: this.mousemove,
                click: this.click,
                dblclick: this.dblclick,
                scope: this
            });
        }
        this.lastTouchPx = evt.xy;
        return this.down(evt);
    },

    /**
     * Method: mousemove
     * Handle mousemove.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousemove: function(evt) {
        return this.move(evt);
    },

    /**
     * Method: touchmove
     * Handle touchmove.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    touchmove: function(evt) {
        this.lastTouchPx = evt.xy;
        return this.move(evt);
    },

    /**
     * Method: mouseup
     * Handle mouseup.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mouseup: function(evt) {
        return this.up(evt);
    },

    /**
     * Method: touchend
     * Handle touchend.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    touchend: function(evt) {
        evt.xy = this.lastTouchPx;
        return this.up(evt);
    },
  
    /**
     * Method: down
     * Handle mousedown and touchstart.  Adjust the geometry and redraw.
     * Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    down: function(evt) {
        this.mouseDown = true;
        this.lastDown = evt.xy;
        if(!this.touch) { // no point displayed until up on touch devices
            this.modifyFeature(evt.xy);
        }
        this.stoppedDown = this.stopDown;
        return !this.stopDown;
    },

    /**
     * Method: move
     * Handle mousemove and touchmove.  Adjust the geometry and redraw.
     * Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    move: function (evt) {
        if(!this.touch // no point displayed until up on touch devices
           && (!this.mouseDown || this.stoppedDown)) {
            this.modifyFeature(evt.xy);
        }
        return true;
    },

    /**
     * Method: up
     * Handle mouseup and touchend.  Send the latest point in the geometry to the control.
     * Return determines whether to propagate the event on the map.
     *
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    up: function (evt) {
        this.mouseDown = false;
        this.stoppedDown = this.stopDown;

        // check keyboard modifiers
        if(!this.checkModifiers(evt)) {
            return true;
        }
        // ignore double-clicks
        if (this.lastUp && this.lastUp.equals(evt.xy)) {
            return true;
        }
        if (this.lastDown && this.passesTolerance(this.lastDown, evt.xy,
                                                  this.pixelTolerance)) {
            if (this.touch) {
                this.modifyFeature(evt.xy);
            }
            if(this.persist) {
                this.destroyPersistedFeature();
            }
            this.lastUp = evt.xy;
            this.finalize();
            return !this.stopUp;
        } else {
            return true;
        }
    },

    /**
     * Method: mouseout
     * Handle mouse out.  For better user experience reset mouseDown
     * and stoppedDown when the mouse leaves the map viewport.
     *
     * Parameters:
     * evt - {Event} The browser event
     */
    mouseout: function(evt) {
        if(OpenLayers.Util.mouseLeft(evt, this.map.viewPortDiv)) {
            this.stoppedDown = this.stopDown;
            this.mouseDown = false;
        }
    },

    /**
     * Method: passesTolerance
     * Determine whether the event is within the optional pixel tolerance.
     *
     * Returns:
     * {Boolean} The event is within the pixel tolerance (if specified).
     */
    passesTolerance: function(pixel1, pixel2, tolerance) {
        var passes = true;

        if (tolerance != null && pixel1 && pixel2) {
            var dist = pixel1.distanceTo(pixel2);
            if (dist > tolerance) {
                passes = false;
            }
        }
        return passes;
    },
    
    CLASS_NAME: "OpenLayers.Handler.Point"
});
/* ======================================================================
    OpenLayers/Handler/Path.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler/Point.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/LineString.js
 */

/**
 * Class: OpenLayers.Handler.Path
 * Handler to draw a path on the map.  Path is displayed on mouse down,
 * moves on mouse move, and is finished on mouse up.
 *
 * Inherits from:
 *  - <OpenLayers.Handler.Point>
 */
OpenLayers.Handler.Path = OpenLayers.Class(OpenLayers.Handler.Point, {
    
    /**
     * Property: line
     * {<OpenLayers.Feature.Vector>}
     */
    line: null,

    /**
     * APIProperty: maxVertices
     * {Number} The maximum number of vertices which can be drawn by this
     * handler. When the number of vertices reaches maxVertices, the
     * geometry is automatically finalized. Default is null.
     */
    maxVertices: null,

    /**
     * Property: doubleTouchTolerance
     * {Number} Maximum number of pixels between two touches for
     *     the gesture to be considered a "finalize feature" action.
     *     Default is 20.
     */
    doubleTouchTolerance: 20,

    /**
     * Property: freehand
     * {Boolean} In freehand mode, the handler starts the path on mouse down,
     * adds a point for every mouse move, and finishes the path on mouse up.
     * Outside of freehand mode, a point is added to the path on every mouse
     * click and double-click finishes the path.
     */
    freehand: false,
    
    /**
     * Property: freehandToggle
     * {String} If set, freehandToggle is checked on mouse events and will set
     * the freehand mode to the opposite of this.freehand.  To disallow
     * toggling between freehand and non-freehand mode, set freehandToggle to
     * null.  Acceptable toggle values are 'shiftKey', 'ctrlKey', and 'altKey'.
     */
    freehandToggle: 'shiftKey',

    /**
     * Property: timerId
     * {Integer} The timer used to test the double touch.
     */
    timerId: null,

    /**
     * Property: redoStack
     * {Array} Stack containing points removed with <undo>.
     */
    redoStack: null,

    /**
     * Constructor: OpenLayers.Handler.Path
     * Create a new path hander
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that owns this handler
     * callbacks - {Object} An object with a properties whose values are
     *     functions.  Various callbacks described below.
     * options - {Object} An optional object with properties to be set on the
     *           handler
     *
     * Named callbacks:
     * create - Called when a sketch is first created.  Callback called with
     *     the creation point geometry and sketch feature.
     * modify - Called with each move of a vertex with the vertex (point)
     *     geometry and the sketch feature.
     * point - Called as each point is added.  Receives the new point geometry.
     * done - Called when the point drawing is finished.  The callback will
     *     recieve a single argument, the linestring geometry.
     * cancel - Called when the handler is deactivated while drawing.  The
     *     cancel callback will receive a geometry.
     */

    /**
     * Method: createFeature
     * Add temporary geometries
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} The initial pixel location for the new
     *     feature.
     */
    createFeature: function(pixel) {
        var lonlat = this.layer.getLonLatFromViewPortPx(pixel); 
        var geometry = new OpenLayers.Geometry.Point(
            lonlat.lon, lonlat.lat
        );
        this.point = new OpenLayers.Feature.Vector(geometry);
        this.line = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.LineString([this.point.geometry])
        );
        this.callback("create", [this.point.geometry, this.getSketch()]);
        this.point.geometry.clearBounds();
        this.layer.addFeatures([this.line, this.point], {silent: true});
    },
        
    /**
     * Method: destroyFeature
     * Destroy temporary geometries
     *
     * Parameters:
     * force - {Boolean} Destroy even if persist is true.
     */
    destroyFeature: function(force) {
        OpenLayers.Handler.Point.prototype.destroyFeature.call(
            this, force);
        this.line = null;
    },

    /**
     * Method: destroyPersistedFeature
     * Destroy the persisted feature.
     */
    destroyPersistedFeature: function() {
        var layer = this.layer;
        if(layer && layer.features.length > 2) {
            this.layer.features[0].destroy();
        }
    },

    /**
     * Method: removePoint
     * Destroy the temporary point.
     */
    removePoint: function() {
        if(this.point) {
            this.layer.removeFeatures([this.point]);
        }
    },
    
    /**
     * Method: addPoint
     * Add point to geometry.  Send the point index to override
     * the behavior of LinearRing that disregards adding duplicate points.
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} The pixel location for the new point.
     */
    addPoint: function(pixel) {
        this.layer.removeFeatures([this.point]);
        var lonlat = this.layer.getLonLatFromViewPortPx(pixel); 
        this.point = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat)
        );
        this.line.geometry.addComponent(
            this.point.geometry, this.line.geometry.components.length
        );
        this.layer.addFeatures([this.point]);
        this.callback("point", [this.point.geometry, this.getGeometry()]);
        this.callback("modify", [this.point.geometry, this.getSketch()]);
        this.drawFeature();
        delete this.redoStack;
    },
    
    /**
     * Method: insertXY
     * Insert a point in the current sketch given x & y coordinates.  The new
     *     point is inserted immediately before the most recently drawn point.
     *
     * Parameters:
     * x - {Number} The x-coordinate of the point.
     * y - {Number} The y-coordinate of the point.
     */
    insertXY: function(x, y) {
        this.line.geometry.addComponent(
            new OpenLayers.Geometry.Point(x, y), 
            this.getCurrentPointIndex()
        );
        this.drawFeature();
        delete this.redoStack;
    },

    /**
     * Method: insertDeltaXY
     * Insert a point given offsets from the previously inserted point.
     *
     * Parameters:
     * dx - {Number} The x-coordinate offset of the point.
     * dy - {Number} The y-coordinate offset of the point.
     */
    insertDeltaXY: function(dx, dy) {
        var previousIndex = this.getCurrentPointIndex() - 1;
        var p0 = this.line.geometry.components[previousIndex];
        if (p0 && !isNaN(p0.x) && !isNaN(p0.y)) {
            this.insertXY(p0.x + dx, p0.y + dy);
        }
    },

    /**
     * Method: insertDirectionLength
     * Insert a point in the current sketch given a direction and a length.
     *
     * Parameters:
     * direction - {Number} Degrees clockwise from the positive x-axis.
     * length - {Number} Distance from the previously drawn point.
     */
    insertDirectionLength: function(direction, length) {
        direction *= Math.PI / 180;
        var dx = length * Math.cos(direction);
        var dy = length * Math.sin(direction);
        this.insertDeltaXY(dx, dy);
    },

    /**
     * Method: insertDeflectionLength
     * Insert a point in the current sketch given a deflection and a length.
     *     The deflection should be degrees clockwise from the previously 
     *     digitized segment.
     *
     * Parameters:
     * deflection - {Number} Degrees clockwise from the previous segment.
     * length - {Number} Distance from the previously drawn point.
     */
    insertDeflectionLength: function(deflection, length) {
        var previousIndex = this.getCurrentPointIndex() - 1;
        if (previousIndex > 0) {
            var p1 = this.line.geometry.components[previousIndex];
            var p0 = this.line.geometry.components[previousIndex-1];
            var theta = Math.atan2(p1.y - p0.y, p1.x - p0.x);
            this.insertDirectionLength(
                (theta * 180 / Math.PI) + deflection, length
            );
        }
    },

    /**
     * Method: getCurrentPointIndex
     * 
     * Returns:
     * {Number} The index of the most recently drawn point.
     */
    getCurrentPointIndex: function() {
        return this.line.geometry.components.length - 1;
    },
    
    
    /**
     * Method: undo
     * Remove the most recently added point in the sketch geometry.
     *
     * Returns: 
     * {Boolean} A point was removed.
     */
    undo: function() {
        var geometry = this.line.geometry;
        var components = geometry.components;
        var index = this.getCurrentPointIndex() - 1;
        var target = components[index];
        var undone = geometry.removeComponent(target);
        if (undone) {
            if (!this.redoStack) {
                this.redoStack = [];
            }
            this.redoStack.push(target);
            this.drawFeature();
        }
        return undone;
    },
    
    /**
     * Method: redo
     * Reinsert the most recently removed point resulting from an <undo> call.
     *     The undo stack is deleted whenever a point is added by other means.
     *
     * Returns: 
     * {Boolean} A point was added.
     */
    redo: function() {
        var target = this.redoStack && this.redoStack.pop();
        if (target) {
            this.line.geometry.addComponent(target, this.getCurrentPointIndex());
            this.drawFeature();
        }
        return !!target;
    },
    
    /**
     * Method: freehandMode
     * Determine whether to behave in freehand mode or not.
     *
     * Returns:
     * {Boolean}
     */
    freehandMode: function(evt) {
        return (this.freehandToggle && evt[this.freehandToggle]) ?
                    !this.freehand : this.freehand;
    },

    /**
     * Method: modifyFeature
     * Modify the existing geometry given the new point
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} The updated pixel location for the latest
     *     point.
     * drawing - {Boolean} Indicate if we're currently drawing.
     */
    modifyFeature: function(pixel, drawing) {
        if(!this.line) {
            this.createFeature(pixel);
        }
        var lonlat = this.layer.getLonLatFromViewPortPx(pixel); 
        this.point.geometry.x = lonlat.lon;
        this.point.geometry.y = lonlat.lat;
        this.callback("modify", [this.point.geometry, this.getSketch(), drawing]);
        this.point.geometry.clearBounds();
        this.drawFeature();
    },

    /**
     * Method: drawFeature
     * Render geometries on the temporary layer.
     */
    drawFeature: function() {
        this.layer.drawFeature(this.line, this.style);
        this.layer.drawFeature(this.point, this.style);
    },

    /**
     * Method: getSketch
     * Return the sketch feature.
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>}
     */
    getSketch: function() {
        return this.line;
    },

    /**
     * Method: getGeometry
     * Return the sketch geometry.  If <multi> is true, this will return
     *     a multi-part geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.LineString>}
     */
    getGeometry: function() {
        var geometry = this.line && this.line.geometry;
        if(geometry && this.multi) {
            geometry = new OpenLayers.Geometry.MultiLineString([geometry]);
        }
        return geometry;
    },

    /**
     * method: touchstart
     * handle touchstart.
     *
     * parameters:
     * evt - {event} the browser event
     *
     * returns:
     * {boolean} allow event propagation
     */
    touchstart: function(evt) {
        if (this.timerId &&
            this.passesTolerance(this.lastTouchPx, evt.xy,
                                 this.doubleTouchTolerance)) {
            // double-tap, finalize the geometry
            this.finishGeometry();
            window.clearTimeout(this.timerId);
            this.timerId = null;
            return false;
        } else {
            if (this.timerId) {
                window.clearTimeout(this.timerId);
                this.timerId = null;
            }
            this.timerId = window.setTimeout(
                OpenLayers.Function.bind(function() {
                    this.timerId = null;
                }, this), 300);
            return OpenLayers.Handler.Point.prototype.touchstart.call(this, evt);
        }
    },

    /**
     * Method: down
     * Handle mousedown and touchstart.  Add a new point to the geometry and
     * render it. Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    down: function(evt) {
        var stopDown = this.stopDown;
        if(this.freehandMode(evt)) {
            stopDown = true;
            if (this.touch) {
                this.modifyFeature(evt.xy, !!this.lastUp);
                OpenLayers.Event.stop(evt);
            }
        }
        if (!this.touch && (!this.lastDown ||
                            !this.passesTolerance(this.lastDown, evt.xy,
                                                  this.pixelTolerance))) {
            this.modifyFeature(evt.xy, !!this.lastUp);
        }
        this.mouseDown = true;
        this.lastDown = evt.xy;
        this.stoppedDown = stopDown;
        return !stopDown;
    },

    /**
     * Method: move
     * Handle mousemove and touchmove.  Adjust the geometry and redraw.
     * Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    move: function (evt) {
        if(this.stoppedDown && this.freehandMode(evt)) {
            if(this.persist) {
                this.destroyPersistedFeature();
            }
            if(this.maxVertices && this.line &&
                    this.line.geometry.components.length === this.maxVertices) {
                this.removePoint();
                this.finalize();
            } else {
                this.addPoint(evt.xy);
            }
            return false;
        }
        if (!this.touch && (!this.mouseDown || this.stoppedDown)) {
            this.modifyFeature(evt.xy, !!this.lastUp);
        }
        return true;
    },
    
    /**
     * Method: up
     * Handle mouseup and touchend.  Send the latest point in the geometry to
     * the control. Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    up: function (evt) {
        if (this.mouseDown && (!this.lastUp || !this.lastUp.equals(evt.xy))) {
            if(this.stoppedDown && this.freehandMode(evt)) {
                if (this.persist) {
                    this.destroyPersistedFeature();
                }
                this.removePoint();
                this.finalize();
            } else {
                if (this.passesTolerance(this.lastDown, evt.xy,
                                         this.pixelTolerance)) {
                    if (this.touch) {
                        this.modifyFeature(evt.xy);
                    }
                    if(this.lastUp == null && this.persist) {
                        this.destroyPersistedFeature();
                    }
                    this.addPoint(evt.xy);
                    this.lastUp = evt.xy;
                    if(this.line.geometry.components.length === this.maxVertices + 1) {
                        this.finishGeometry();
                    }
                }
            }
        }
        this.stoppedDown = this.stopDown;
        this.mouseDown = false;
        return !this.stopUp;
    },

    /**
     * APIMethod: finishGeometry
     * Finish the geometry and send it back to the control.
     */
    finishGeometry: function() {
        var index = this.line.geometry.components.length - 1;
        this.line.geometry.removeComponent(this.line.geometry.components[index]);
        this.removePoint();
        this.finalize();
    },
  
    /**
     * Method: dblclick 
     * Handle double-clicks.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    dblclick: function(evt) {
        if(!this.freehandMode(evt)) {
            this.finishGeometry();
        }
        return false;
    },

    CLASS_NAME: "OpenLayers.Handler.Path"
});
/* ======================================================================
    OpenLayers/Spherical.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/SingleFile.js
 */

/**
 * Namespace: Spherical
 * The OpenLayers.Spherical namespace includes utility functions for
 * calculations on the basis of a spherical earth (ignoring ellipsoidal
 * effects), which is accurate enough for most purposes.
 *
 * Relevant links:
 * * http://www.movable-type.co.uk/scripts/latlong.html
 * * http://code.google.com/apis/maps/documentation/javascript/reference.html#spherical
 */

OpenLayers.Spherical = OpenLayers.Spherical || {};

OpenLayers.Spherical.DEFAULT_RADIUS = 6378137;

/**
 * APIFunction: computeDistanceBetween
 * Computes the distance between two LonLats.
 *
 * Parameters:
 * from   - {<OpenLayers.LonLat>} or {Object} Starting point. A LonLat or
 *          a JavaScript literal with lon lat properties.
 * to     - {<OpenLayers.LonLat>} or {Object} Ending point. A LonLat or a
 *          JavaScript literal with lon lat properties.
 * radius - {Float} The radius. Optional. Defaults to 6378137 meters.
 *
 * Returns:
 * {Float} The distance in meters.
 */
OpenLayers.Spherical.computeDistanceBetween = function(from, to, radius) {
  var R = radius || OpenLayers.Spherical.DEFAULT_RADIUS;
  var sinHalfDeltaLon = Math.sin(Math.PI * (to.lon - from.lon) / 360);
  var sinHalfDeltaLat = Math.sin(Math.PI * (to.lat - from.lat) / 360);
  var a = sinHalfDeltaLat * sinHalfDeltaLat +
      sinHalfDeltaLon * sinHalfDeltaLon * Math.cos(Math.PI * from.lat / 180) * Math.cos(Math.PI * to.lat / 180); 
  return 2 * R * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); 
};


/**
 * APIFunction: computeHeading
 * Computes the heading from one LonLat to another LonLat.
 *
 * Parameters:
 * from   - {<OpenLayers.LonLat>} or {Object} Starting point. A LonLat or
 *          a JavaScript literal with lon lat properties.
 * to     - {<OpenLayers.LonLat>} or {Object} Ending point. A LonLat or a
 *          JavaScript literal with lon lat properties.
 *
 * Returns:
 * {Float} The heading in degrees.
 */
OpenLayers.Spherical.computeHeading = function(from, to) {
    var y = Math.sin(Math.PI * (from.lon - to.lon) / 180) * Math.cos(Math.PI * to.lat / 180);
    var x = Math.cos(Math.PI * from.lat / 180) * Math.sin(Math.PI * to.lat / 180) -
        Math.sin(Math.PI * from.lat / 180) * Math.cos(Math.PI * to.lat / 180) * Math.cos(Math.PI * (from.lon - to.lon) / 180);
    return 180 * Math.atan2(y, x) / Math.PI;
};
/* ======================================================================
    OpenLayers/Control/CacheWrite.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Request.js
 * @requires OpenLayers/Console.js
 */

/**
 * Class: OpenLayers.Control.CacheWrite
 * A control for caching image tiles in the browser's local storage. The
 * <OpenLayers.Control.CacheRead> control is used to fetch and use the cached
 * tile images.
 *
 * Note: Before using this control on any layer that is not your own, make sure
 * that the terms of service of the tile provider allow local storage of tiles.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.CacheWrite = OpenLayers.Class(OpenLayers.Control, {
    
    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * To register events in the constructor, configure <eventListeners>.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * cachefull - Triggered when the cache is full. Listeners receive an
     *     object with a tile property as first argument. The tile references
     *     the tile that couldn't be cached.
     */
    
    /**
     * APIProperty: eventListeners
     * {Object} Object with event listeners, keyed by event name. An optional
     *     scope property defines the scope that listeners will be executed in.
     */

    /**
     * APIProperty: layers
     * {Array(<OpenLayers.Layer.Grid>)}. Optional. If provided, caching
     *     will be enabled for these layers only, otherwise for all cacheable
     *     layers.
     */
    layers: null,
    
    /**
     * APIProperty: imageFormat
     * {String} The image format used for caching. The default is "image/png".
     *     Supported formats depend on the user agent. If an unsupported
     *     <imageFormat> is provided, "image/png" will be used. For aerial
     *     imagery, "image/jpeg" is recommended.
     */
    imageFormat: "image/png",
    
    /**
     * Property: quotaRegEx
     * {RegExp}
     */
    quotaRegEx: (/quota/i),
    
    /**
     * Constructor: OpenLayers.Control.CacheWrite
     *
     * Parameters:
     * options - {Object} Object with API properties for this control.
     */

    /** 
     * Method: setMap
     * Set the map property for the control. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
        var i, layers = this.layers || map.layers;
        for (i=layers.length-1; i>=0; --i) {
            this.addLayer({layer: layers[i]});
        }
        if (!this.layers) {
            map.events.on({
                addlayer: this.addLayer,
                removeLayer: this.removeLayer,
                scope: this
            });
        }
    },
    
    /**
     * Method: addLayer
     * Adds a layer to the control. Once added, tiles requested for this layer
     *     will be cached.
     *
     * Parameters:
     * evt - {Object} Object with a layer property referencing an
     *     <OpenLayers.Layer> instance
     */
    addLayer: function(evt) {
        evt.layer.events.on({
            tileloadstart: this.makeSameOrigin,
            tileloaded: this.cache,
            scope: this
        });        
    },
    
    /**
     * Method: removeLayer
     * Removes a layer from the control. Once removed, tiles requested for this
     *     layer will no longer be cached.
     *
     * Parameters:
     * evt - {Object} Object with a layer property referencing an
     *     <OpenLayers.Layer> instance
     */
    removeLayer: function(evt) {
        evt.layer.events.un({
            tileloadstart: this.makeSameOrigin,
            tileloaded: this.cache,
            scope: this
        });
    },

    /**
     * Method: makeSameOrigin
     * If the tile does not have CORS image loading enabled and is from a
     * different origin, use OpenLayers.ProxyHost to make it a same origin url.
     *
     * Parameters:
     * evt - {<OpenLayers.Event>}
     */
    makeSameOrigin: function(evt) {
        if (this.active) {
            var tile = evt.tile;
            if (tile instanceof OpenLayers.Tile.Image &&
                    !tile.crossOriginKeyword &&
                    tile.url.substr(0, 5) !== "data:") {
                var sameOriginUrl = OpenLayers.Request.makeSameOrigin(
                    tile.url, OpenLayers.ProxyHost
                );
                OpenLayers.Control.CacheWrite.urlMap[sameOriginUrl] = tile.url;
                tile.url = sameOriginUrl;
            }
        }
    },
    
    /**
     * Method: cache
     * Adds a tile to the cache. When the cache is full, the "cachefull" event
     * is triggered.
     *
     * Parameters:
     * obj - {Object} Object with a tile property, tile being the
     *     <OpenLayers.Tile.Image> with the data to add to the cache
     */
    cache: function(obj) {
        if (this.active && window.localStorage) {
            var tile = obj.tile;
            if (tile instanceof OpenLayers.Tile.Image &&
                    tile.url.substr(0, 5) !== 'data:') {
                try {
                    var canvasContext = tile.getCanvasContext();
                    if (canvasContext) {
                        var urlMap = OpenLayers.Control.CacheWrite.urlMap;
                        var url = urlMap[tile.url] || tile.url;
                        window.localStorage.setItem(
                            "olCache_" + url,
                            canvasContext.canvas.toDataURL(this.imageFormat)
                        );
                        delete urlMap[tile.url];
                    }
                } catch(e) {
                    // local storage full or CORS violation
                    var reason = e.name || e.message;
                    if (reason && this.quotaRegEx.test(reason)) {
                        this.events.triggerEvent("cachefull", {tile: tile});
                    } else {
                        OpenLayers.Console.error(e.toString());
                    }
                }
            }
        }
    },
    
    /**
     * Method: destroy
     * The destroy method is used to perform any clean up before the control
     * is dereferenced.  Typically this is where event listeners are removed
     * to prevent memory leaks.
     */
    destroy: function() {
        if (this.layers || this.map) {
            var i, layers = this.layers || this.map.layers;
            for (i=layers.length-1; i>=0; --i) {
                this.removeLayer({layer: layers[i]});
            }
        }
        if (this.map) {
            this.map.events.un({
                addlayer: this.addLayer,
                removeLayer: this.removeLayer,
                scope: this
            });
        }
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Control.CacheWrite"
});

/**
 * APIFunction: OpenLayers.Control.CacheWrite.clearCache
 * Clears all tiles cached with <OpenLayers.Control.CacheWrite> from the cache.
 */
OpenLayers.Control.CacheWrite.clearCache = function() {
    if (!window.localStorage) { return; }
    var i, key;
    for (i=window.localStorage.length-1; i>=0; --i) {
        key = window.localStorage.key(i);
        if (key.substr(0, 8) === "olCache_") {
            window.localStorage.removeItem(key);
        }
    }
};

/**
 * Property: OpenLayers.Control.CacheWrite.urlMap
 * {Object} Mapping of same origin urls to cache url keys. Entries will be
 *     deleted as soon as a tile was cached.
 */
OpenLayers.Control.CacheWrite.urlMap = {};


/* ======================================================================
    OpenLayers/Format/Context.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */

/**
 * Class: OpenLayers.Format.Context
 * Base class for both Format.WMC and Format.OWSContext
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.Context = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {

    /**
     * Property: layerOptions
     * {Object} Default options for layers created by the parser. These
     *     options are overridden by the options which are read from the
     *     capabilities document.
     */
    layerOptions: null,

    /**
     * Property: layerParams
     * {Object} Default parameters for layers created by the parser. This
     *     can be used e.g. to override DEFAULT_PARAMS for 
     *     OpenLayers.Layer.WMS.
     */
    layerParams: null,

    /**
     * Constructor: OpenLayers.Format.Context
     * Create a new parser for Context documents.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read Context data from a string, and return an object with map
     *     properties and a list of layers.
     *
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse.
     * options - {Object} The options object must contain a map property.  If
     *     the map property is a string, it must be the id of a dom element
     *     where the new map will be placed.  If the map property is an
     *     <OpenLayers.Map>, the layers from the context document will be added
     *     to the map.
     *
     * Returns:
     * {<OpenLayers.Map>} A map based on the context.
     */
    read: function(data, options) {
        var context = OpenLayers.Format.XML.VersionedOGC.prototype.read.apply(this, 
            arguments);
        var map;
        if(options && options.map) {
            this.context = context;
            if(options.map instanceof OpenLayers.Map) {
                map = this.mergeContextToMap(context, options.map);
            } else {
                var mapOptions = options.map;
                if(OpenLayers.Util.isElement(mapOptions) ||
                   typeof mapOptions == "string") {
                    // we assume mapOptions references a div
                    // element
                    mapOptions = {div: mapOptions};
                }
                map = this.contextToMap(context, mapOptions);
            }
        } else {
            // not documented as part of the API, provided as a non-API option
            map = context;
        }
        return map;
    },

    /**
     * Method: getLayerFromContext
     * Create a WMS layer from a layerContext object.
     *
     * Parameters:
     * layerContext - {Object} An object representing a WMS layer.
     *
     * Returns:
     * {<OpenLayers.Layer.WMS>} A WMS layer.
     */
    getLayerFromContext: function(layerContext) {
        var i, len;
        // fill initial options object from layerContext
        var options = {
            queryable: layerContext.queryable, //keep queryable for api compatibility
            visibility: layerContext.visibility,
            maxExtent: layerContext.maxExtent,
            metadata: OpenLayers.Util.applyDefaults(layerContext.metadata, 
            {styles: layerContext.styles,
             formats: layerContext.formats,
             "abstract": layerContext["abstract"],
             dataURL: layerContext.dataURL
            }),
            numZoomLevels: layerContext.numZoomLevels,
            units: layerContext.units,
            isBaseLayer: layerContext.isBaseLayer,
            opacity: layerContext.opacity,
            displayInLayerSwitcher: layerContext.displayInLayerSwitcher,
            singleTile: layerContext.singleTile,
            tileSize: (layerContext.tileSize) ? 
                new OpenLayers.Size(
                    layerContext.tileSize.width, 
                    layerContext.tileSize.height
                ) : undefined,
            minScale: layerContext.minScale || layerContext.maxScaleDenominator,
            maxScale: layerContext.maxScale || layerContext.minScaleDenominator,
            srs: layerContext.srs,
            dimensions: layerContext.dimensions,
            metadataURL: layerContext.metadataURL
        };
        if (this.layerOptions) {
            OpenLayers.Util.applyDefaults(options, this.layerOptions);
        }

        var params = {
            layers: layerContext.name,
            transparent: layerContext.transparent,
            version: layerContext.version
        };
        if (layerContext.formats && layerContext.formats.length>0) {
            // set default value for params if current attribute is not positionned
            params.format = layerContext.formats[0].value;
            for (i=0, len=layerContext.formats.length; i<len; i++) {
                var format = layerContext.formats[i];
                if (format.current == true) {
                    params.format = format.value;
                    break;
                }
            }
        }
        if (layerContext.styles && layerContext.styles.length>0) {
            for (i=0, len=layerContext.styles.length; i<len; i++) {
                var style = layerContext.styles[i];
                if (style.current == true) {
                    // three style types to consider
                    // 1) linked SLD
                    // 2) inline SLD
                    // 3) named style
                    if(style.href) {
                        params.sld = style.href;
                    } else if(style.body) {
                        params.sld_body = style.body;
                    } else {
                        params.styles = style.name;
                    }
                    break;
                }
            }
        }
        if (this.layerParams) {
            OpenLayers.Util.applyDefaults(params, this.layerParams);
        }

        var layer = null;
        var service = layerContext.service;
        if (service == OpenLayers.Format.Context.serviceTypes.WFS) {
            options.strategies = [new OpenLayers.Strategy.BBOX()];
            options.protocol = new OpenLayers.Protocol.WFS({
                url: layerContext.url,
                // since we do not know featureNS, let the protocol
                // determine it automagically using featurePrefix
                featurePrefix: layerContext.name.split(":")[0],
                featureType: layerContext.name.split(":").pop()
            });
            layer = new OpenLayers.Layer.Vector(
                layerContext.title || layerContext.name,
                options
            );
        } else if (service == OpenLayers.Format.Context.serviceTypes.KML) {
            // use a vector layer with an HTTP Protcol and a Fixed strategy
            options.strategies = [new OpenLayers.Strategy.Fixed()];
            options.protocol = new OpenLayers.Protocol.HTTP({
                url: layerContext.url, 
                format: new OpenLayers.Format.KML()
            });
            layer = new OpenLayers.Layer.Vector(
                layerContext.title || layerContext.name,
                options
            );
        } else if (service == OpenLayers.Format.Context.serviceTypes.GML) {
            // use a vector layer with a HTTP Protocol and a Fixed strategy
            options.strategies = [new OpenLayers.Strategy.Fixed()];
            options.protocol = new OpenLayers.Protocol.HTTP({
                url: layerContext.url, 
                format: new OpenLayers.Format.GML()
            });
            layer = new OpenLayers.Layer.Vector(
                layerContext.title || layerContext.name,
                options
            );
        } else if (layerContext.features) {
            // inline GML or KML features
            layer = new OpenLayers.Layer.Vector(
                layerContext.title || layerContext.name,
                options
            );
            layer.addFeatures(layerContext.features);
        } else if (layerContext.categoryLayer !== true) {
            layer = new OpenLayers.Layer.WMS(
                layerContext.title || layerContext.name,
                layerContext.url,
                params,
                options
            );
        }
        return layer;
    },

    /**
     * Method: getLayersFromContext
     * Create an array of layers from an array of layerContext objects.
     *
     * Parameters:
     * layersContext - {Array(Object)} An array of objects representing layers.
     *
     * Returns:
     * {Array(<OpenLayers.Layer>)} An array of layers.
     */
    getLayersFromContext: function(layersContext) {
        var layers = [];
        for (var i=0, len=layersContext.length; i<len; i++) {
            var layer = this.getLayerFromContext(layersContext[i]);
            if (layer !== null) {
                layers.push(layer);
            }
        }
        return layers;
    },

    /**
     * Method: contextToMap
     * Create a map given a context object.
     *
     * Parameters:
     * context - {Object} The context object.
     * options - {Object} Default map options.
     *
     * Returns:
     * {<OpenLayers.Map>} A map based on the context object.
     */
    contextToMap: function(context, options) {
        options = OpenLayers.Util.applyDefaults({
            maxExtent:  context.maxExtent,
            projection: context.projection,
            units:      context.units
        }, options);

        if (options.maxExtent) {
            options.maxResolution = 
                options.maxExtent.getWidth() / OpenLayers.Map.TILE_WIDTH;
        }

        var metadata = {
            contactInformation: context.contactInformation,
            "abstract":         context["abstract"],
            keywords:           context.keywords,
            logo:               context.logo,
            descriptionURL:     context.descriptionURL
        };

        options.metadata = metadata;

        var map = new OpenLayers.Map(options);
        map.addLayers(this.getLayersFromContext(context.layersContext));
        map.setCenter(
            context.bounds.getCenterLonLat(),
            map.getZoomForExtent(context.bounds, true)
        );
        return map;
    },

    /**
     * Method: mergeContextToMap
     * Add layers from a context object to a map.
     *
     * Parameters:
     * context - {Object} The context object.
     * map - {<OpenLayers.Map>} The map.
     *
     * Returns:
     * {<OpenLayers.Map>} The same map with layers added.
     */
    mergeContextToMap: function(context, map) {
        map.addLayers(this.getLayersFromContext(context.layersContext));
        return map;
    },

    /**
     * APIMethod: write
     * Write a context document given a map.
     *
     * Parameters:
     * obj - {<OpenLayers.Map> | Object} A map or context object.
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} A context document string.
     */
    write: function(obj, options) {
        obj = this.toContext(obj);
        return OpenLayers.Format.XML.VersionedOGC.prototype.write.apply(this,
            arguments);
    },

    CLASS_NAME: "OpenLayers.Format.Context"
});

/**
 * Constant: OpenLayers.Format.Context.serviceTypes
 * Enumeration for service types
 */
OpenLayers.Format.Context.serviceTypes = {
    "WMS": "urn:ogc:serviceType:WMS",
    "WFS": "urn:ogc:serviceType:WFS",
    "WCS": "urn:ogc:serviceType:WCS",
    "GML": "urn:ogc:serviceType:GML",
    "SLD": "urn:ogc:serviceType:SLD",
    "FES": "urn:ogc:serviceType:FES",
    "KML": "urn:ogc:serviceType:KML"
};
/* ======================================================================
    OpenLayers/Format/WMC.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/Context.js
 */

/**
 * Class: OpenLayers.Format.WMC
 * Read and write Web Map Context documents.
 *
 * Inherits from:
 *  - <OpenLayers.Format.Context>
 */
OpenLayers.Format.WMC = OpenLayers.Class(OpenLayers.Format.Context, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.1.0".
     */
    defaultVersion: "1.1.0",

    /**
     * Constructor: OpenLayers.Format.WMC
     * Create a new parser for Web Map Context documents.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * Method: layerToContext
     * Create a layer context object given a wms layer object.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.WMS>} The layer.
     *
     * Returns:
     * {Object} A layer context object.
     */
    layerToContext: function(layer) {
        var parser = this.getParser();
        var layerContext = {
            queryable: layer.queryable,
            visibility: layer.visibility,
            name: layer.params["LAYERS"],
            title: layer.name,
            "abstract": layer.metadata["abstract"],
            dataURL: layer.metadata.dataURL,
            metadataURL: layer.metadataURL,
            server: {
            version: layer.params["VERSION"],
                url: layer.url
            },
            maxExtent: layer.maxExtent,
            transparent: layer.params["TRANSPARENT"],
            numZoomLevels: layer.numZoomLevels,
            units: layer.units,
            isBaseLayer: layer.isBaseLayer,
            opacity: layer.opacity == 1 ? undefined : layer.opacity,
            displayInLayerSwitcher: layer.displayInLayerSwitcher,
            singleTile: layer.singleTile,
            tileSize: (layer.singleTile || !layer.tileSize) ? 
                undefined : {width: layer.tileSize.w, height: layer.tileSize.h},
            minScale : (layer.options.resolutions ||
                        layer.options.scales || 
                        layer.options.maxResolution || 
                        layer.options.minScale) ? 
                        layer.minScale : undefined,
            maxScale : (layer.options.resolutions ||
                        layer.options.scales || 
                        layer.options.minResolution || 
                        layer.options.maxScale) ? 
                        layer.maxScale : undefined,
            formats: [],
            styles: [],
            srs: layer.srs,
            dimensions: layer.dimensions
        };


        if (layer.metadata.servertitle) {
            layerContext.server.title = layer.metadata.servertitle;
        }

        if (layer.metadata.formats && layer.metadata.formats.length > 0) {
            for (var i=0, len=layer.metadata.formats.length; i<len; i++) {
                var format = layer.metadata.formats[i];
                layerContext.formats.push({
                    value: format.value,
                    current: (format.value == layer.params["FORMAT"])
                });
            }
        } else {
            layerContext.formats.push({
                value: layer.params["FORMAT"],
                current: true
            });
        }

        if (layer.metadata.styles && layer.metadata.styles.length > 0) {
            for (var i=0, len=layer.metadata.styles.length; i<len; i++) {
                var style = layer.metadata.styles[i];
                if ((style.href == layer.params["SLD"]) ||
                    (style.body == layer.params["SLD_BODY"]) ||
                    (style.name == layer.params["STYLES"])) {
                    style.current = true;
                } else {
                    style.current = false;
                }
                layerContext.styles.push(style);
            }
        } else {
            layerContext.styles.push({
                href: layer.params["SLD"],
                body: layer.params["SLD_BODY"],
                name: layer.params["STYLES"] || parser.defaultStyleName,
                title: parser.defaultStyleTitle,
                current: true
            });
        }

        return layerContext;
    },
    
    /**
     * Method: toContext
     * Create a context object free from layer given a map or a
     * context object.
     *
     * Parameters:
     * obj - {<OpenLayers.Map> | Object} The map or context.
     *
     * Returns:
     * {Object} A context object.
     */
    toContext: function(obj) {
        var context = {};
        var layers = obj.layers;
        if (obj.CLASS_NAME == "OpenLayers.Map") {
            var metadata = obj.metadata || {};
            context.size = obj.getSize();
            context.bounds = obj.getExtent();
            context.projection = obj.projection;
            context.title = obj.title;
            context.keywords = metadata.keywords;
            context["abstract"] = metadata["abstract"];
            context.logo = metadata.logo;
            context.descriptionURL = metadata.descriptionURL;
            context.contactInformation = metadata.contactInformation;
            context.maxExtent = obj.maxExtent;
        } else {
            // copy all obj properties except the "layers" property
            OpenLayers.Util.applyDefaults(context, obj);
            if (context.layers != undefined) {
                delete(context.layers);
            }
        }

        if (context.layersContext == undefined) {
            context.layersContext = [];
        }

        // let's convert layers into layersContext object (if any)
        if (layers != undefined && OpenLayers.Util.isArray(layers)) {
            for (var i=0, len=layers.length; i<len; i++) {
                var layer = layers[i];
                if (layer instanceof OpenLayers.Layer.WMS) {
                    context.layersContext.push(this.layerToContext(layer));
                }
            }
        }
        return context;
    },

    CLASS_NAME: "OpenLayers.Format.WMC" 

});
/* ======================================================================
    OpenLayers/Format/WMC/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMC.js
 * @requires OpenLayers/Format/XML.js
 */

/**
 * Class: OpenLayers.Format.WMC.v1
 * Superclass for WMC version 1 parsers.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WMC.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ol: "http://openlayers.org/context",
        wmc: "http://www.opengis.net/context",
        sld: "http://www.opengis.net/sld",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },
    
    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocation: "",

    /**
     * Method: getNamespacePrefix
     * Get the namespace prefix for a given uri from the <namespaces> object.
     *
     * Returns:
     * {String} A namespace prefix or null if none found.
     */
    getNamespacePrefix: function(uri) {
        var prefix = null;
        if(uri == null) {
            prefix = this.namespaces[this.defaultPrefix];
        } else {
            for(prefix in this.namespaces) {
                if(this.namespaces[prefix] == uri) {
                    break;
                }
            }
        }
        return prefix;
    },
    
    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "wmc",

    /**
     * Property: rootPrefix
     * {String} Prefix on the root node that maps to the context namespace URI.
     */
    rootPrefix: null,
    
    /**
     * Property: defaultStyleName
     * {String} Style name used if layer has no style param.  Default is "".
     */
    defaultStyleName: "",
    
    /**
     * Property: defaultStyleTitle
     * {String} Default style title.  Default is "Default".
     */
    defaultStyleTitle: "Default",
    
    /**
     * Constructor: OpenLayers.Format.WMC.v1
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.WMC> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },

    /**
     * Method: read
     * Read capabilities data from a string, and return a list of layers. 
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} List of named layers.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var root = data.documentElement;
        this.rootPrefix = root.prefix;
        var context = {
            version: root.getAttribute("version")
        };
        this.runChildNodes(context, root);
        return context;
    },
    
    /**
     * Method: runChildNodes
     */
    runChildNodes: function(obj, node) {
        var children = node.childNodes;
        var childNode, processor, prefix, local;
        for(var i=0, len=children.length; i<len; ++i) {
            childNode = children[i];
            if(childNode.nodeType == 1) {
                prefix = this.getNamespacePrefix(childNode.namespaceURI);
                local = childNode.nodeName.split(":").pop();
                processor = this["read_" + prefix + "_" + local];
                if(processor) {
                    processor.apply(this, [obj, childNode]);
                }
            }
        }
    },
    
    /**
     * Method: read_wmc_General
     */
    read_wmc_General: function(context, node) {
        this.runChildNodes(context, node);
    },
    
    /**
     * Method: read_wmc_BoundingBox
     */
    read_wmc_BoundingBox: function(context, node) {
        context.projection = node.getAttribute("SRS");
        context.bounds = new OpenLayers.Bounds(
            node.getAttribute("minx"), node.getAttribute("miny"),
            node.getAttribute("maxx"), node.getAttribute("maxy")
        );
    },
    
    /**
     * Method: read_wmc_LayerList
     */
    read_wmc_LayerList: function(context, node) {
        // layersContext is an array containing info for each layer
        context.layersContext = [];
        this.runChildNodes(context, node);
    },
    
    /**
     * Method: read_wmc_Layer
     */
    read_wmc_Layer: function(context, node) {
        var layerContext = {
            visibility: (node.getAttribute("hidden") != "1"),
            queryable: (node.getAttribute("queryable") == "1"),
            formats: [],
             styles: [],
             metadata: {}
        };

        this.runChildNodes(layerContext, node);
        // set properties common to multiple objects on layer options/params
        context.layersContext.push(layerContext);
    },
    
    /**
     * Method: read_wmc_Extension
     */
    read_wmc_Extension: function(obj, node) {
        this.runChildNodes(obj, node);
    },

    /**
     * Method: read_ol_units
     */
    read_ol_units: function(layerContext, node) {
        layerContext.units = this.getChildValue(node);
    },
    
    /**
     * Method: read_ol_maxExtent
     */
    read_ol_maxExtent: function(obj, node) {
        var bounds = new OpenLayers.Bounds(
            node.getAttribute("minx"), node.getAttribute("miny"),
            node.getAttribute("maxx"), node.getAttribute("maxy")
        );
        obj.maxExtent = bounds;
    },
    
    /**
     * Method: read_ol_transparent
     */
    read_ol_transparent: function(layerContext, node) {
        layerContext.transparent = this.getChildValue(node);
    },

    /**
     * Method: read_ol_numZoomLevels
     */
    read_ol_numZoomLevels: function(layerContext, node) {
        layerContext.numZoomLevels = parseInt(this.getChildValue(node));
    },

    /**
     * Method: read_ol_opacity
     */
    read_ol_opacity: function(layerContext, node) {
        layerContext.opacity = parseFloat(this.getChildValue(node));
    },

    /**
     * Method: read_ol_singleTile
     */
    read_ol_singleTile: function(layerContext, node) {
        layerContext.singleTile = (this.getChildValue(node) == "true");
    },

    /**
     * Method: read_ol_tileSize
     */
    read_ol_tileSize: function(layerContext, node) {
        var obj = {"width": node.getAttribute("width"), "height": node.getAttribute("height")};
        layerContext.tileSize = obj;
    },
    
    /**
     * Method: read_ol_isBaseLayer
     */
    read_ol_isBaseLayer: function(layerContext, node) {
        layerContext.isBaseLayer = (this.getChildValue(node) == "true");
    },

    /**
     * Method: read_ol_displayInLayerSwitcher
     */
    read_ol_displayInLayerSwitcher: function(layerContext, node) {
        layerContext.displayInLayerSwitcher = (this.getChildValue(node) == "true");
    },

    /**
     * Method: read_wmc_Server
     */
    read_wmc_Server: function(layerContext, node) {
        layerContext.version = node.getAttribute("version");
         layerContext.url = this.getOnlineResource_href(node);
         layerContext.metadata.servertitle = node.getAttribute("title");
    },

    /**
     * Method: read_wmc_FormatList
     */
    read_wmc_FormatList: function(layerContext, node) {
        this.runChildNodes(layerContext, node);
    },

    /**
     * Method: read_wmc_Format
     */
    read_wmc_Format: function(layerContext, node) {
        var format = {
            value: this.getChildValue(node)
        };
        if(node.getAttribute("current") == "1") {
            format.current = true;
        }
        layerContext.formats.push(format);
    },
    
    /**
     * Method: read_wmc_StyleList
     */
    read_wmc_StyleList: function(layerContext, node) {
        this.runChildNodes(layerContext, node);
    },

    /**
     * Method: read_wmc_Style
     */
    read_wmc_Style: function(layerContext, node) {
        var style = {};
        this.runChildNodes(style, node);
        if(node.getAttribute("current") == "1") {
            style.current = true;
        }
        layerContext.styles.push(style);
    },
    
    /**
     * Method: read_wmc_SLD
     */
    read_wmc_SLD: function(style, node) {
        this.runChildNodes(style, node);
        // style either comes back with an href or a body property
    },
    
    /**
     * Method: read_sld_StyledLayerDescriptor
     */
    read_sld_StyledLayerDescriptor: function(sld, node) {
        var xml = OpenLayers.Format.XML.prototype.write.apply(this, [node]);
        sld.body = xml;
    },

    /**
      * Method: read_sld_FeatureTypeStyle
      */
     read_sld_FeatureTypeStyle: function(sld, node) {
         var xml = OpenLayers.Format.XML.prototype.write.apply(this, [node]);
         sld.body = xml;
     },

     /**
     * Method: read_wmc_OnlineResource
     */
    read_wmc_OnlineResource: function(obj, node) {
        obj.href = this.getAttributeNS(
            node, this.namespaces.xlink, "href"
        );
    },
    
    /**
     * Method: read_wmc_Name
     */
    read_wmc_Name: function(obj, node) {
        var name = this.getChildValue(node);
        if(name) {
            obj.name = name;
        }
    },

    /**
     * Method: read_wmc_Title
     */
    read_wmc_Title: function(obj, node) {
        var title = this.getChildValue(node);
        if(title) {
            obj.title = title;
        }
    },

    /**
     * Method: read_wmc_MetadataURL
     */
    read_wmc_MetadataURL: function(layerContext, node) {
         layerContext.metadataURL = this.getOnlineResource_href(node);
     },

     /**
      * Method: read_wmc_KeywordList
      */
     read_wmc_KeywordList: function(context, node) {
         context.keywords = [];
         this.runChildNodes(context.keywords, node);
    },

    /**
      * Method: read_wmc_Keyword
      */
     read_wmc_Keyword: function(keywords, node) {
         keywords.push(this.getChildValue(node));
     },

     /**
     * Method: read_wmc_Abstract
     */
    read_wmc_Abstract: function(obj, node) {
        var abst = this.getChildValue(node);
        if(abst) {
            obj["abstract"] = abst;
        }
    },
    
    /**
      * Method: read_wmc_LogoURL
      */
     read_wmc_LogoURL: function(context, node) {
         context.logo = {
             width:  node.getAttribute("width"),
             height: node.getAttribute("height"),
             format: node.getAttribute("format"),
             href:   this.getOnlineResource_href(node)
         };
     },

     /**
      * Method: read_wmc_DescriptionURL
      */
     read_wmc_DescriptionURL: function(context, node) {
         context.descriptionURL = this.getOnlineResource_href(node);
     },

     /**
      * Method: read_wmc_ContactInformation
     */
     read_wmc_ContactInformation: function(obj, node) {
         var contact = {};
         this.runChildNodes(contact, node);
         obj.contactInformation = contact;
     },

     /**
      * Method: read_wmc_ContactPersonPrimary
      */
     read_wmc_ContactPersonPrimary: function(contact, node) {
         var personPrimary = {};
         this.runChildNodes(personPrimary, node);
         contact.personPrimary = personPrimary;
     },

     /**
      * Method: read_wmc_ContactPerson
      */
     read_wmc_ContactPerson: function(primaryPerson, node) {
         var person = this.getChildValue(node);
         if (person) {
             primaryPerson.person = person;
         }
     },

     /**
      * Method: read_wmc_ContactOrganization
      */
     read_wmc_ContactOrganization: function(primaryPerson, node) {
         var organization = this.getChildValue(node);
         if (organization) {
             primaryPerson.organization = organization;
         }
     },

     /**
      * Method: read_wmc_ContactPosition
      */
     read_wmc_ContactPosition: function(contact, node) {
         var position = this.getChildValue(node);
         if (position) {
             contact.position = position;
         }
     },

     /**
      * Method: read_wmc_ContactAddress
      */
     read_wmc_ContactAddress: function(contact, node) {
         var contactAddress = {};
         this.runChildNodes(contactAddress, node);
         contact.contactAddress = contactAddress;
     },

     /**
      * Method: read_wmc_AddressType
      */
     read_wmc_AddressType: function(contactAddress, node) {
         var type = this.getChildValue(node);
         if (type) {
             contactAddress.type = type;
         }
     },

     /**
      * Method: read_wmc_Address
      */
     read_wmc_Address: function(contactAddress, node) {
         var address = this.getChildValue(node);
         if (address) {
             contactAddress.address = address;
         }
     },

     /**
      * Method: read_wmc_City
      */
     read_wmc_City: function(contactAddress, node) {
         var city = this.getChildValue(node);
         if (city) {
             contactAddress.city = city;
         }
     },

     /**
      * Method: read_wmc_StateOrProvince
      */
     read_wmc_StateOrProvince: function(contactAddress, node) {
         var stateOrProvince = this.getChildValue(node);
         if (stateOrProvince) {
             contactAddress.stateOrProvince = stateOrProvince;
         }
     },

     /**
      * Method: read_wmc_PostCode
      */
     read_wmc_PostCode: function(contactAddress, node) {
         var postcode = this.getChildValue(node);
         if (postcode) {
             contactAddress.postcode = postcode;
         }
     },

     /**
      * Method: read_wmc_Country
      */
     read_wmc_Country: function(contactAddress, node) {
         var country = this.getChildValue(node);
         if (country) {
             contactAddress.country = country;
         }
     },

     /**
      * Method: read_wmc_ContactVoiceTelephone
      */
     read_wmc_ContactVoiceTelephone: function(contact, node) {
         var phone = this.getChildValue(node);
         if (phone) {
             contact.phone = phone;
         }
     },

     /**
      * Method: read_wmc_ContactFacsimileTelephone
      */
     read_wmc_ContactFacsimileTelephone: function(contact, node) {
         var fax = this.getChildValue(node);
         if (fax) {
             contact.fax = fax;
         }
     },

     /**
      * Method: read_wmc_ContactElectronicMailAddress
      */
     read_wmc_ContactElectronicMailAddress: function(contact, node) {
         var email = this.getChildValue(node);
         if (email) {
             contact.email = email;
         }
     },

     /**
      * Method: read_wmc_DataURL
      */
     read_wmc_DataURL: function(layerContext, node) {
         layerContext.dataURL = this.getOnlineResource_href(node);
     },

     /**
     * Method: read_wmc_LegendURL
     */
    read_wmc_LegendURL: function(style, node) {
        var legend = {
            width: node.getAttribute('width'),
             height: node.getAttribute('height'),
             format: node.getAttribute('format'),
             href:   this.getOnlineResource_href(node)
        };
        style.legend = legend;
    },
    
    /**
      * Method: read_wmc_DimensionList
      */
     read_wmc_DimensionList: function(layerContext, node) {
         layerContext.dimensions = {};
         this.runChildNodes(layerContext.dimensions, node);
     },
     /**
      * Method: read_wmc_Dimension
      */
     read_wmc_Dimension: function(dimensions, node) {
         var name = node.getAttribute("name").toLowerCase();

         var dim = {
             name:           name,
             units:          node.getAttribute("units")          ||  "",
             unitSymbol:     node.getAttribute("unitSymbol")     ||  "",
             userValue:      node.getAttribute("userValue")      ||  "",
             nearestValue:   node.getAttribute("nearestValue")   === "1",
             multipleValues: node.getAttribute("multipleValues") === "1",
             current:        node.getAttribute("current")        === "1",
             "default":      node.getAttribute("default")        ||  ""
         };
         var values = this.getChildValue(node);
         dim.values = values.split(",");

         dimensions[dim.name] = dim;
     },

     /**
     * Method: write
     *
     * Parameters:
     * context - {Object} An object representing the map context.
     * options - {Object} Optional object.
     *
     * Returns:
     * {String} A WMC document string.
     */
    write: function(context, options) {
        var root = this.createElementDefaultNS("ViewContext");
        this.setAttributes(root, {
            version: this.VERSION,
            id: (options && typeof options.id == "string") ?
                    options.id :
                    OpenLayers.Util.createUniqueID("OpenLayers_Context_")
        });
        
        // add schemaLocation attribute
        this.setAttributeNS(
            root, this.namespaces.xsi,
            "xsi:schemaLocation", this.schemaLocation
        );
        
        // required General element
        root.appendChild(this.write_wmc_General(context));

        // required LayerList element
        root.appendChild(this.write_wmc_LayerList(context));

        return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
    },
    
    /**
     * Method: createElementDefaultNS
     * Shorthand for createElementNS with namespace from <defaultPrefix>.
     *     Can optionally be used to set attributes and a text child value.
     *
     * Parameters:
     * name - {String} The qualified node name.
     * childValue - {String} Optional value for text child node.
     * attributes - {Object} Optional object representing attributes.
     *
     * Returns:
     * {Element} An element node.
     */
    createElementDefaultNS: function(name, childValue, attributes) {
        var node = this.createElementNS(
            this.namespaces[this.defaultPrefix],
            name
        );
        if(childValue) {
            node.appendChild(this.createTextNode(childValue));
        }
        if(attributes) {
            this.setAttributes(node, attributes);
        }
        return node;
    },
    
    /**
     * Method: setAttributes
     * Set multiple attributes given key value pairs from an object.
     *
     * Parameters:
     * node - {Element} An element node.
     * obj - {Object} An object whose properties represent attribute names and
     *     values represent attribute values.
     */
    setAttributes: function(node, obj) {
        var value;
        for(var name in obj) {
            value = obj[name].toString();
            if(value.match(/[A-Z]/)) {
                // safari lowercases attributes with setAttribute
                this.setAttributeNS(node, null, name, value);
            } else {
                node.setAttribute(name, value);
            }
        }
    },

    /**
     * Method: write_wmc_General
     * Create a General node given an context object.
     *
     * Parameters:
     * context - {Object} Context object.
     *
     * Returns:
     * {Element} A WMC General element node.
     */
    write_wmc_General: function(context) {
        var node = this.createElementDefaultNS("General");

        // optional Window element
        if(context.size) {
            node.appendChild(this.createElementDefaultNS(
                "Window", null,
                {
                    width: context.size.w,
                    height: context.size.h
                }
            ));
        }
        
        // required BoundingBox element
        var bounds = context.bounds;
        node.appendChild(this.createElementDefaultNS(
            "BoundingBox", null,
            {
                minx: bounds.left.toPrecision(18),
                miny: bounds.bottom.toPrecision(18),
                maxx: bounds.right.toPrecision(18),
                maxy: bounds.top.toPrecision(18),
                SRS: context.projection
            }
        ));

        // required Title element
        node.appendChild(this.createElementDefaultNS(
            "Title", context.title
        ));
        
         // optional KeywordList element
         if (context.keywords) {
             node.appendChild(this.write_wmc_KeywordList(context.keywords));
         }

         // optional Abstract element
         if (context["abstract"]) {
             node.appendChild(this.createElementDefaultNS(
                 "Abstract", context["abstract"]
             ));
         }

         // Optional LogoURL element
         if (context.logo) {
             node.appendChild(this.write_wmc_URLType("LogoURL", context.logo.href, context.logo));
         }

         // Optional DescriptionURL element
         if (context.descriptionURL) {
             node.appendChild(this.write_wmc_URLType("DescriptionURL", context.descriptionURL));
         }

         // Optional ContactInformation element
         if (context.contactInformation) {
             node.appendChild(this.write_wmc_ContactInformation(context.contactInformation));
         }

        // OpenLayers specific map properties
        node.appendChild(this.write_ol_MapExtension(context));
        
        return node;
    },
    
    /**
      * Method: write_wmc_KeywordList
      */
     write_wmc_KeywordList: function(keywords) {
         var node = this.createElementDefaultNS("KeywordList");

         for (var i=0, len=keywords.length; i<len; i++) {
             node.appendChild(this.createElementDefaultNS(
                 "Keyword", keywords[i]
             ));
         }
         return node;
     },
     /**
      * Method: write_wmc_ContactInformation
      */
     write_wmc_ContactInformation: function(contact) {
         var node = this.createElementDefaultNS("ContactInformation");

         if (contact.personPrimary) {
             node.appendChild(this.write_wmc_ContactPersonPrimary(contact.personPrimary));
         }
         if (contact.position) {
             node.appendChild(this.createElementDefaultNS(
                 "ContactPosition", contact.position
             ));
         }
         if (contact.contactAddress) {
             node.appendChild(this.write_wmc_ContactAddress(contact.contactAddress));
         }
         if (contact.phone) {
             node.appendChild(this.createElementDefaultNS(
                 "ContactVoiceTelephone", contact.phone
             ));
         }
         if (contact.fax) {
             node.appendChild(this.createElementDefaultNS(
                 "ContactFacsimileTelephone", contact.fax
             ));
         }
         if (contact.email) {
             node.appendChild(this.createElementDefaultNS(
                 "ContactElectronicMailAddress", contact.email
             ));
         }
         return node;
     },

     /**
      * Method: write_wmc_ContactPersonPrimary
      */
     write_wmc_ContactPersonPrimary: function(personPrimary) {
         var node = this.createElementDefaultNS("ContactPersonPrimary");
         if (personPrimary.person) {
             node.appendChild(this.createElementDefaultNS(
                 "ContactPerson", personPrimary.person
             ));
         }
         if (personPrimary.organization) {
             node.appendChild(this.createElementDefaultNS(
                 "ContactOrganization", personPrimary.organization
             ));
         }
         return node;
     },

     /**
      * Method: write_wmc_ContactAddress
      */
     write_wmc_ContactAddress: function(contactAddress) {
         var node = this.createElementDefaultNS("ContactAddress");
         if (contactAddress.type) {
             node.appendChild(this.createElementDefaultNS(
                 "AddressType", contactAddress.type
             ));
         }
         if (contactAddress.address) {
             node.appendChild(this.createElementDefaultNS(
                 "Address", contactAddress.address
             ));
         }
         if (contactAddress.city) {
             node.appendChild(this.createElementDefaultNS(
                 "City", contactAddress.city
             ));
         }
         if (contactAddress.stateOrProvince) {
             node.appendChild(this.createElementDefaultNS(
                 "StateOrProvince", contactAddress.stateOrProvince
             ));
         }
         if (contactAddress.postcode) {
             node.appendChild(this.createElementDefaultNS(
                 "PostCode", contactAddress.postcode
             ));
         }
         if (contactAddress.country) {
             node.appendChild(this.createElementDefaultNS(
                 "Country", contactAddress.country
             ));
         }
         return node;
     },

     /**
     * Method: write_ol_MapExtension
     */
    write_ol_MapExtension: function(context) {
        var node = this.createElementDefaultNS("Extension");
        
        var bounds = context.maxExtent;
        if(bounds) {
            var maxExtent = this.createElementNS(
                this.namespaces.ol, "ol:maxExtent"
            );
            this.setAttributes(maxExtent, {
                minx: bounds.left.toPrecision(18),
                miny: bounds.bottom.toPrecision(18),
                maxx: bounds.right.toPrecision(18),
                maxy: bounds.top.toPrecision(18)
            });
            node.appendChild(maxExtent);
        }
        
        return node;
    },
    
    /**
     * Method: write_wmc_LayerList
     * Create a LayerList node given an context object.
     *
     * Parameters:
     * context - {Object} Context object.
     *
     * Returns:
     * {Element} A WMC LayerList element node.
     */
    write_wmc_LayerList: function(context) {
        var list = this.createElementDefaultNS("LayerList");
        
        for(var i=0, len=context.layersContext.length; i<len; ++i) {
            list.appendChild(this.write_wmc_Layer(context.layersContext[i]));
        }
        
        return list;
    },

    /**
     * Method: write_wmc_Layer
     * Create a Layer node given a layer context object.
     *
     * Parameters:
     * context - {Object} A layer context object.}
     *
     * Returns:
     * {Element} A WMC Layer element node.
     */
    write_wmc_Layer: function(context) {
        var node = this.createElementDefaultNS(
            "Layer", null, {
                queryable: context.queryable ? "1" : "0",
                hidden: context.visibility ? "0" : "1"
            }
        );
        
        // required Server element
        node.appendChild(this.write_wmc_Server(context));

        // required Name element
        node.appendChild(this.createElementDefaultNS(
            "Name", context.name
        ));
        
        // required Title element
        node.appendChild(this.createElementDefaultNS(
            "Title", context.title
        ));

         // optional Abstract element
         if (context["abstract"]) {
             node.appendChild(this.createElementDefaultNS(
                 "Abstract", context["abstract"]
             ));
         }

         // optional DataURL element
         if (context.dataURL) {
             node.appendChild(this.write_wmc_URLType("DataURL", context.dataURL));
         }

        // optional MetadataURL element
        if (context.metadataURL) {
             node.appendChild(this.write_wmc_URLType("MetadataURL", context.metadataURL));
        }
        
        return node;
    },
    
    /**
     * Method: write_wmc_LayerExtension
     * Add OpenLayers specific layer parameters to an Extension element.
     *
     * Parameters:
     * context - {Object} A layer context object.
     *
     * Returns:
     * {Element} A WMC Extension element (for a layer).
     */
    write_wmc_LayerExtension: function(context) {
        var node = this.createElementDefaultNS("Extension");
        
        var bounds = context.maxExtent;
        var maxExtent = this.createElementNS(
            this.namespaces.ol, "ol:maxExtent"
        );
        this.setAttributes(maxExtent, {
            minx: bounds.left.toPrecision(18),
            miny: bounds.bottom.toPrecision(18),
            maxx: bounds.right.toPrecision(18),
            maxy: bounds.top.toPrecision(18)
        });
        node.appendChild(maxExtent);
        
        if (context.tileSize && !context.singleTile) {
            var size = this.createElementNS(
                this.namespaces.ol, "ol:tileSize"
            );
            this.setAttributes(size, context.tileSize);
            node.appendChild(size);
        }
        
        var properties = [
            "transparent", "numZoomLevels", "units", "isBaseLayer",
            "opacity", "displayInLayerSwitcher", "singleTile"
        ];
        var child;
        for(var i=0, len=properties.length; i<len; ++i) {
            child = this.createOLPropertyNode(context, properties[i]);
            if(child) {
                node.appendChild(child);
            }
        }

        return node;
    },
    
    /**
     * Method: createOLPropertyNode
     * Create a node representing an OpenLayers property.  If the property is
     *     null or undefined, null will be returned.
     *
     * Parameters:
     * obj - {Object} An object.
     * prop - {String} A property.
     *
     * Returns:
     * {Element} A property node.
     */
    createOLPropertyNode: function(obj, prop) {
        var node = null;
        if(obj[prop] != null) {
            node = this.createElementNS(this.namespaces.ol, "ol:" + prop);
            node.appendChild(this.createTextNode(obj[prop].toString()));
        }
        return node;
    },

    /**
     * Method: write_wmc_Server
     * Create a Server node given a layer context object.
     *
     * Parameters:
     * context - {Object} Layer context object.
     *
     * Returns:
     * {Element} A WMC Server element node.
     */
    write_wmc_Server: function(context) {
         var server = context.server;
        var node = this.createElementDefaultNS("Server");
         var attributes = {
            service: "OGC:WMS",
             version: server.version
         };
         if (server.title) {
             attributes.title = server.title;
         }
         this.setAttributes(node, attributes);
        
        // required OnlineResource element
         node.appendChild(this.write_wmc_OnlineResource(server.url));
        
        return node;
    },

    /**
     * Method: write_wmc_URLType
     * Create a LogoURL/DescriptionURL/MetadataURL/DataURL/LegendURL node given a object and elementName.
     *
     * Parameters:
     * elName - {String} Name of element (LogoURL/DescriptionURL/MetadataURL/LegendURL)
     * url - {String} URL string value
     * attr - {Object} Optional attributes (width, height, format)
     *
     * Returns:
     * {Element} A WMC element node.
     */
     write_wmc_URLType: function(elName, url, attr) {
         var node = this.createElementDefaultNS(elName);
         node.appendChild(this.write_wmc_OnlineResource(url));
         if (attr) {
             var optionalAttributes = ["width", "height", "format"];
             for (var i=0; i<optionalAttributes.length; i++) {
                 if (optionalAttributes[i] in attr) {
                     node.setAttribute(optionalAttributes[i], attr[optionalAttributes[i]]);
                 }
             }
         }
         return node;
     },

     /**
      * Method: write_wmc_DimensionList
      */
     write_wmc_DimensionList: function(context) {
         var node = this.createElementDefaultNS("DimensionList");
         var required_attributes = {
             name: true,
             units: true,
             unitSymbol: true,
             userValue: true
         };
         for (var dim in context.dimensions) {
             var attributes = {};
             var dimension = context.dimensions[dim];
             for (var name in dimension) {
                 if (typeof dimension[name] == "boolean") {
                     attributes[name] = Number(dimension[name]);
                 } else {
                     attributes[name] = dimension[name];
                 }
             }
             var values = "";
             if (attributes.values) {
                 values = attributes.values.join(",");
                 delete attributes.values;
             }

             node.appendChild(this.createElementDefaultNS(
                 "Dimension", values, attributes
             ));
         }
        return node;
    },

    /**
     * Method: write_wmc_FormatList
     * Create a FormatList node given a layer context.
     *
     * Parameters:
     * context - {Object} Layer context object.
     *
     * Returns:
     * {Element} A WMC FormatList element node.
     */
    write_wmc_FormatList: function(context) {
        var node = this.createElementDefaultNS("FormatList");
        for (var i=0, len=context.formats.length; i<len; i++) {
            var format = context.formats[i];
            node.appendChild(this.createElementDefaultNS(
                "Format",
                format.value,
                (format.current && format.current == true) ?
                    {current: "1"} : null
            ));
        }

        return node;
    },

    /**
     * Method: write_wmc_StyleList
     * Create a StyleList node given a layer context.
     *
     * Parameters:
     * layer - {Object} Layer context object.
     *
     * Returns:
     * {Element} A WMC StyleList element node.
     */
    write_wmc_StyleList: function(layer) {
        var node = this.createElementDefaultNS("StyleList");

        var styles = layer.styles;
        if (styles && OpenLayers.Util.isArray(styles)) {
            var sld;
            for (var i=0, len=styles.length; i<len; i++) {
                var s = styles[i];
                // three style types to consider
                // [1] linked SLD
                // [2] inline SLD
                // [3] named style
                // running child nodes always gets name, optionally gets href or body
                var style = this.createElementDefaultNS(
                    "Style",
                    null,
                    (s.current && s.current == true) ?
                    {current: "1"} : null
                );
                if(s.href) { // [1]
                    sld = this.createElementDefaultNS("SLD");
                     // Name is optional.
                     if (s.name) {
                    sld.appendChild(this.createElementDefaultNS("Name", s.name));
                     }
                    // Title is optional.
                    if (s.title) {
                        sld.appendChild(this.createElementDefaultNS("Title", s.title));
                    }
                     // LegendURL is optional
                     if (s.legend) {
                         sld.appendChild(this.write_wmc_URLType("LegendURL", s.legend.href, s.legend));
                     }

                     var link = this.write_wmc_OnlineResource(s.href);
                     sld.appendChild(link);
                    style.appendChild(sld);
                } else if(s.body) { // [2]
                    sld = this.createElementDefaultNS("SLD");
                     // Name is optional.
                     if (s.name) {
                         sld.appendChild(this.createElementDefaultNS("Name", s.name));
                     }
                     // Title is optional.
                     if (s.title) {
                         sld.appendChild(this.createElementDefaultNS("Title", s.title));
                     }
                     // LegendURL is optional
                     if (s.legend) {
                         sld.appendChild(this.write_wmc_URLType("LegendURL", s.legend.href, s.legend));
                     }

                    // read in body as xml doc - assume proper namespace declarations
                    var doc = OpenLayers.Format.XML.prototype.read.apply(this, [s.body]);
                    // append to StyledLayerDescriptor node
                    var imported = doc.documentElement;
                    if(sld.ownerDocument && sld.ownerDocument.importNode) {
                        imported = sld.ownerDocument.importNode(imported, true);
                    }
                    sld.appendChild(imported);
                    style.appendChild(sld);            
                } else { // [3]
                    // both Name and Title are required.
                    style.appendChild(this.createElementDefaultNS("Name", s.name));
                    style.appendChild(this.createElementDefaultNS("Title", s.title));
                    // Abstract is optional
                    if (s['abstract']) { // abstract is a js keyword
                        style.appendChild(this.createElementDefaultNS(
                            "Abstract", s['abstract']
                        ));
                    }
                     // LegendURL is optional
                     if (s.legend) {
                         style.appendChild(this.write_wmc_URLType("LegendURL", s.legend.href, s.legend));
                }
                 }
                node.appendChild(style);
            }
        }

        return node;
    },

    /**
     * Method: write_wmc_OnlineResource
     * Create an OnlineResource node given a URL.
     *
     * Parameters:
     * href - {String} URL for the resource.
     *
     * Returns:
     * {Element} A WMC OnlineResource element node.
     */
    write_wmc_OnlineResource: function(href) {
        var node = this.createElementDefaultNS("OnlineResource");
        this.setAttributeNS(node, this.namespaces.xlink, "xlink:type", "simple");
        this.setAttributeNS(node, this.namespaces.xlink, "xlink:href", href);
        return node;
    },

     /**
      * Method: getOnlineResource_href
      */
     getOnlineResource_href: function(node) {
         var object = {};
         var links = node.getElementsByTagName("OnlineResource");
         if(links.length > 0) {
             this.read_wmc_OnlineResource(object, links[0]);
         }
         return object.href;
     },


    CLASS_NAME: "OpenLayers.Format.WMC.v1" 

});
/* ======================================================================
    OpenLayers/Control/PanPanel.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/Panel.js
 * @requires OpenLayers/Control/Pan.js
 */

/**
 * Class: OpenLayers.Control.PanPanel
 * The PanPanel is visible control for panning the map North, South, East or
 * West in small steps. By default it is drawn in the top left corner of the
 * map.
 *
 * Note: 
 * If you wish to use this class with the default images and you want 
 *       it to look nice in ie6, you should add the following, conditionally
 *       added css stylesheet to your HTML file:
 * 
 * (code)
 * <!--[if lte IE 6]>
 *   <link rel="stylesheet" href="../theme/default/ie6-style.css" type="text/css" />
 * <![endif]-->
 * (end)
 *
 * Inherits from:
 *  - <OpenLayers.Control.Panel> 
 */
OpenLayers.Control.PanPanel = OpenLayers.Class(OpenLayers.Control.Panel, {

    /** 
     * APIProperty: slideFactor
     * {Integer} Number of pixels by which we'll pan the map in any direction 
     *     on clicking the arrow buttons, defaults to 50.  If you want to pan
     *     by some ratio of the map dimensions, use <slideRatio> instead.
     */
    slideFactor: 50,

    /** 
     * APIProperty: slideRatio
     * {Number} The fraction of map width/height by which we'll pan the map            
     *     on clicking the arrow buttons.  Default is null.  If set, will
     *     override <slideFactor>. E.g. if slideRatio is .5, then Pan Up will
     *     pan up half the map height. 
     */
    slideRatio: null,

    /**
     * Constructor: OpenLayers.Control.PanPanel 
     * Add the four directional pan buttons.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(options) {
        OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);
        var options = {
            slideFactor: this.slideFactor,
            slideRatio: this.slideRatio
        };
        this.addControls([
            new OpenLayers.Control.Pan(OpenLayers.Control.Pan.NORTH, options),
            new OpenLayers.Control.Pan(OpenLayers.Control.Pan.SOUTH, options),
            new OpenLayers.Control.Pan(OpenLayers.Control.Pan.EAST, options),
            new OpenLayers.Control.Pan(OpenLayers.Control.Pan.WEST, options)
        ]);
    },

    CLASS_NAME: "OpenLayers.Control.PanPanel"
});
/* ======================================================================
    OpenLayers/Control/Attribution.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.Attribution
 * The attribution control adds attribution from layers to the map display. 
 * It uses 'attribution' property of each layer.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Attribution = 
  OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: seperator
     * {String} String used to seperate layers.
     */
    separator: ", ",
    
    /**
     * APIProperty: template
     * {String} Template for the attribution. This has to include the substring
     *     "${layers}", which will be replaced by the layer specific
     *     attributions, separated by <separator>. The default is "${layers}".
     */
    template: "${layers}",
    
    /**
     * Constructor: OpenLayers.Control.Attribution 
     * 
     * Parameters:
     * options - {Object} Options for control.
     */

    /** 
     * Method: destroy
     * Destroy control.
     */
    destroy: function() {
        this.map.events.un({
            "removelayer": this.updateAttribution,
            "addlayer": this.updateAttribution,
            "changelayer": this.updateAttribution,
            "changebaselayer": this.updateAttribution,
            scope: this
        });
        
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },    
    
    /**
     * Method: draw
     * Initialize control.
     * 
     * Returns: 
     * {DOMElement} A reference to the DIV DOMElement containing the control
     */    
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        
        this.map.events.on({
            'changebaselayer': this.updateAttribution,
            'changelayer': this.updateAttribution,
            'addlayer': this.updateAttribution,
            'removelayer': this.updateAttribution,
            scope: this
        });
        this.updateAttribution();
        
        return this.div;    
    },

    /**
     * Method: updateAttribution
     * Update attribution string.
     */
    updateAttribution: function() {
        var attributions = [];
        if (this.map && this.map.layers) {
            for(var i=0, len=this.map.layers.length; i<len; i++) {
                var layer = this.map.layers[i];
                if (layer.attribution && layer.getVisibility()) {
                    // add attribution only if attribution text is unique
                    if (OpenLayers.Util.indexOf(
                                    attributions, layer.attribution) === -1) {
                        attributions.push( layer.attribution );
                    }
                }
            } 
            this.div.innerHTML = OpenLayers.String.format(this.template, {
                layers: attributions.join(this.separator)
            });
        }
    },

    CLASS_NAME: "OpenLayers.Control.Attribution"
});
/* ======================================================================
    OpenLayers/Kinetic.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Animation.js
 */

OpenLayers.Kinetic = OpenLayers.Class({

    /**
     * Property: threshold
     * In most cases changing the threshold isn't needed.
     * In px/ms, default to 0.
     */
    threshold: 0,

    /**
     * Property: deceleration
     * {Float} the deseleration in px/ms², default to 0.0035.
     */
    deceleration: 0.0035,

    /**
     * Property: nbPoints
     * {Integer} the number of points we use to calculate the kinetic
     * initial values.
     */
    nbPoints: 100,

    /**
     * Property: delay
     * {Float} time to consider to calculate the kinetic initial values.
     * In ms, default to 200.
     */
    delay: 200,

    /**
     * Property: points
     * List of points use to calculate the kinetic initial values.
     */
    points: undefined,

    /**
     * Property: timerId
     * ID of the timer.
     */
    timerId: undefined,

    /**
     * Constructor: OpenLayers.Kinetic
     *
     * Parameters:
     * options - {Object}
     */
    initialize: function(options) {
        OpenLayers.Util.extend(this, options);
    },

    /**
     * Method: begin
     * Begins the dragging.
     */
    begin: function() {
        OpenLayers.Animation.stop(this.timerId);
        this.timerId = undefined;
        this.points = [];
    },

    /**
     * Method: update
     * Updates during the dragging.
     *
     * Parameters:
     * xy - {<OpenLayers.Pixel>} The new position.
     */
    update: function(xy) {
        this.points.unshift({xy: xy, tick: new Date().getTime()});
        if (this.points.length > this.nbPoints) {
            this.points.pop();
        }
    },

    /**
     * Method: end
     * Ends the dragging, start the kinetic.
     *
     * Parameters:
     * xy - {<OpenLayers.Pixel>} The last position.
     *
     * Returns:
     * {Object} An object with two properties: "speed", and "theta". The
     *     "speed" and "theta" values are to be passed to the move 
     *     function when starting the animation.
     */
    end: function(xy) {
        var last, now = new Date().getTime();
        for (var i = 0, l = this.points.length, point; i < l; i++) {
            point = this.points[i];
            if (now - point.tick > this.delay) {
                break;
            }
            last = point;
        }
        if (!last) {
            return;
        }
        var time = new Date().getTime() - last.tick;
        var dist = Math.sqrt(Math.pow(xy.x - last.xy.x, 2) +
                             Math.pow(xy.y - last.xy.y, 2));
        var speed = dist / time;
        if (speed == 0 || speed < this.threshold) {
            return;
        }
        var theta = Math.asin((xy.y - last.xy.y) / dist);
        if (last.xy.x <= xy.x) {
            theta = Math.PI - theta;
        }
        return {speed: speed, theta: theta};
    },

    /**
     * Method: move
     * Launch the kinetic move pan.
     *
     * Parameters:
     * info - {Object} An object with two properties, "speed", and "theta".
     *     These values are those returned from the "end" call.
     * callback - {Function} Function called on every step of the animation,
     *     receives x, y (values to pan), end (is the last point).
     */
    move: function(info, callback) {
        var v0 = info.speed;
        var fx = Math.cos(info.theta);
        var fy = -Math.sin(info.theta);

        var initialTime = new Date().getTime();

        var lastX = 0;
        var lastY = 0;

        var timerCallback = function() {
            if (this.timerId == null) {
                return;
            }

            var t = new Date().getTime() - initialTime;

            var p = (-this.deceleration * Math.pow(t, 2)) / 2.0 + v0 * t;
            var x = p * fx;
            var y = p * fy;

            var args = {};
            args.end = false;
            var v = -this.deceleration * t + v0;

            if (v <= 0) {
                OpenLayers.Animation.stop(this.timerId);
                this.timerId = null;
                args.end = true;
            }

            args.x = x - lastX;
            args.y = y - lastY;
            lastX = x;
            lastY = y;
            callback(args.x, args.y, args.end);
        };

        this.timerId = OpenLayers.Animation.start(
            OpenLayers.Function.bind(timerCallback, this)
        );
    },

    CLASS_NAME: "OpenLayers.Kinetic"
});
/* ======================================================================
    OpenLayers/Layer/GeoRSS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Markers.js
 * @requires OpenLayers/Request/XMLHttpRequest.js
 */

/**
 * Class: OpenLayers.Layer.GeoRSS
 * Add GeoRSS Point features to your map. 
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Markers>
 */
OpenLayers.Layer.GeoRSS = OpenLayers.Class(OpenLayers.Layer.Markers, {

    /** 
     * Property: location 
     * {String} store url of text file 
     */
    location: null,

    /** 
     * Property: features 
     * {Array(<OpenLayers.Feature>)} 
     */
    features: null,
    
    /**
     * APIProperty: formatOptions
     * {Object} Hash of options which should be passed to the format when it is
     * created. Must be passed in the constructor.
     */
    formatOptions: null, 

    /** 
     * Property: selectedFeature 
     * {<OpenLayers.Feature>} 
     */
    selectedFeature: null,

    /** 
     * APIProperty: icon 
     * {<OpenLayers.Icon>}. This determines the Icon to be used on the map
     * for this GeoRSS layer.
     */
    icon: null,

    /**
     * APIProperty: popupSize
     * {<OpenLayers.Size>} This determines the size of GeoRSS popups. If 
     * not provided, defaults to 250px by 120px. 
     */
    popupSize: null, 
    
    /** 
     * APIProperty: useFeedTitle 
     * {Boolean} Set layer.name to the first <title> element in the feed. Default is true. 
     */
    useFeedTitle: true,
    
    /**
    * Constructor: OpenLayers.Layer.GeoRSS
    * Create a GeoRSS Layer.
    *
    * Parameters:
    * name - {String} 
    * location - {String} 
    * options - {Object}
    */
    initialize: function(name, location, options) {
        OpenLayers.Layer.Markers.prototype.initialize.apply(this, [name, options]);
        this.location = location;
        this.features = [];
    },

    /**
     * Method: destroy 
     */
    destroy: function() {
        // Warning: Layer.Markers.destroy() must be called prior to calling
        // clearFeatures() here, otherwise we leak memory. Indeed, if
        // Layer.Markers.destroy() is called after clearFeatures(), it won't be
        // able to remove the marker image elements from the layer's div since
        // the markers will have been destroyed by clearFeatures().
        OpenLayers.Layer.Markers.prototype.destroy.apply(this, arguments);
        this.clearFeatures();
        this.features = null;
    },

    /**
     * Method: loadRSS
     * Start the load of the RSS data. Don't do this when we first add the layer,
     * since we may not be visible at any point, and it would therefore be a waste.
     */
    loadRSS: function() {
        if (!this.loaded) {
            this.events.triggerEvent("loadstart");
            OpenLayers.Request.GET({
                url: this.location,
                success: this.parseData,
                scope: this
            });
            this.loaded = true;
        }    
    },    
    
    /**
     * Method: moveTo
     * If layer is visible and RSS has not been loaded, load RSS. 
     * 
     * Parameters:
     * bounds - {Object} 
     * zoomChanged - {Object} 
     * minor - {Object} 
     */
    moveTo:function(bounds, zoomChanged, minor) {
        OpenLayers.Layer.Markers.prototype.moveTo.apply(this, arguments);
        if(this.visibility && !this.loaded){
            this.loadRSS();
        }
    },
        
    /**
     * Method: parseData
     * Parse the data returned from the Events call.
     *
     * Parameters:
     * ajaxRequest - {<OpenLayers.Request.XMLHttpRequest>} 
     */
    parseData: function(ajaxRequest) {
        var doc = ajaxRequest.responseXML;
        if (!doc || !doc.documentElement) {
            doc = OpenLayers.Format.XML.prototype.read(ajaxRequest.responseText);
        }
        
        if (this.useFeedTitle) {
            var name = null;
            try {
                name = doc.getElementsByTagNameNS('*', 'title')[0].firstChild.nodeValue;
            }
            catch (e) {
                name = doc.getElementsByTagName('title')[0].firstChild.nodeValue;
            }
            if (name) {
                this.setName(name);
            }    
        }
       
        var options = {};
        
        OpenLayers.Util.extend(options, this.formatOptions);
        
        if (this.map && !this.projection.equals(this.map.getProjectionObject())) {
            options.externalProjection = this.projection;
            options.internalProjection = this.map.getProjectionObject();
        }    
        
        var format = new OpenLayers.Format.GeoRSS(options);
        var features = format.read(doc);
        
        for (var i=0, len=features.length; i<len; i++) {
            var data = {};
            var feature = features[i];
            
            // we don't support features with no geometry in the GeoRSS
            // layer at this time. 
            if (!feature.geometry) {
                continue;
            }    
            
            var title = feature.attributes.title ? 
                         feature.attributes.title : "Untitled";
            
            var description = feature.attributes.description ? 
                         feature.attributes.description : "No description.";
            
            var link = feature.attributes.link ? feature.attributes.link : "";

            var location = feature.geometry.getBounds().getCenterLonLat();
            
            
            data.icon = this.icon == null ? 
                                     OpenLayers.Marker.defaultIcon() : 
                                     this.icon.clone();
            
            data.popupSize = this.popupSize ? 
                             this.popupSize.clone() :
                             new OpenLayers.Size(250, 120);
            
            if (title || description) {
                // we have supplemental data, store them.
                data.title = title;
                data.description = description;
            
                var contentHTML = '<div class="olLayerGeoRSSClose">[x]</div>'; 
                contentHTML += '<div class="olLayerGeoRSSTitle">';
                if (link) {
                    contentHTML += '<a class="link" href="'+link+'" target="_blank">';
                }
                contentHTML += title;
                if (link) {
                    contentHTML += '</a>';
                }
                contentHTML += '</div>';
                contentHTML += '<div style="" class="olLayerGeoRSSDescription">';
                contentHTML += description;
                contentHTML += '</div>';
                data['popupContentHTML'] = contentHTML;                
            }
            var feature = new OpenLayers.Feature(this, location, data);
            this.features.push(feature);
            var marker = feature.createMarker();
            marker.events.register('click', feature, this.markerClick);
            this.addMarker(marker);
        }
        this.events.triggerEvent("loadend");
    },
    
    /**
     * Method: markerClick
     *
     * Parameters:
     * evt - {Event} 
     */
    markerClick: function(evt) {
        var sameMarkerClicked = (this == this.layer.selectedFeature);
        this.layer.selectedFeature = (!sameMarkerClicked) ? this : null;
        for(var i=0, len=this.layer.map.popups.length; i<len; i++) {
            this.layer.map.removePopup(this.layer.map.popups[i]);
        }
        if (!sameMarkerClicked) {
            var popup = this.createPopup();
            OpenLayers.Event.observe(popup.div, "click",
                OpenLayers.Function.bind(function() { 
                    for(var i=0, len=this.layer.map.popups.length; i<len; i++) { 
                        this.layer.map.removePopup(this.layer.map.popups[i]); 
                    }
                }, this)
            );
            this.layer.map.addPopup(popup); 
        }
        OpenLayers.Event.stop(evt);
    },

    /**
     * Method: clearFeatures
     * Destroy all features in this layer.
     */
    clearFeatures: function() {
        if (this.features != null) {
            while(this.features.length > 0) {
                var feature = this.features[0];
                OpenLayers.Util.removeItem(this.features, feature);
                feature.destroy();
            }
        }        
    },
    
    CLASS_NAME: "OpenLayers.Layer.GeoRSS"
});
/* ======================================================================
    OpenLayers/Symbolizer/Point.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Symbolizer.js
 */

/**
 * Class: OpenLayers.Symbolizer.Point
 * A symbolizer used to render point features.
 */
OpenLayers.Symbolizer.Point = OpenLayers.Class(OpenLayers.Symbolizer, {
    
    /**
     * APIProperty: strokeColor
     * {String} Color for line stroke.  This is a RGB hex value (e.g. "#ff0000"
     *     for red).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeOpacity
     * {Number} Stroke opacity (0-1).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeWidth
     * {Number} Pixel stroke width.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeLinecap
     * {String} Stroke cap type ("butt", "round", or "square").
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * Property: strokeDashstyle
     * {String} Stroke dash style according to the SLD spec. Note that the
     *     OpenLayers values for strokeDashstyle ("dot", "dash", "dashdot",
     *     "longdash", "longdashdot", or "solid") will not work in SLD, but
     *     most SLD patterns will render correctly in OpenLayers.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * APIProperty: fillColor
     * {String} RGB hex fill color (e.g. "#ff0000" for red).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: fillOpacity
     * {Number} Fill opacity (0-1).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * APIProperty: pointRadius
     * {Number} Pixel point radius.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * APIProperty: externalGraphic
     * {String} Url to an external graphic that will be used for rendering 
     *     points.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: graphicWidth
     * {Number} Pixel width for sizing an external graphic.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: graphicHeight
     * {Number} Pixel height for sizing an external graphic.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: graphicOpacity
     * {Number} Opacity (0-1) for an external graphic.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: graphicXOffset
     * {Number} Pixel offset along the positive x axis for displacing an 
     *     external graphic.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: graphicYOffset
     * {Number} Pixel offset along the positive y axis for displacing an 
     *     external graphic.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * APIProperty: rotation
     * {Number} The rotation of a graphic in the clockwise direction about its 
     *     center point (or any point off center as specified by 
     *     <graphicXOffset> and <graphicYOffset>).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: graphicName
     * {String} Named graphic to use when rendering points.  Supported values 
     *     include "circle", "square", "star", "x", "cross", and "triangle".
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * Constructor: OpenLayers.Symbolizer.Point
     * Create a symbolizer for rendering points.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     symbolizer.  Any documented symbolizer property can be set at 
     *     construction.
     *
     * Returns:
     * A new point symbolizer.
     */
    initialize: function(config) {
        OpenLayers.Symbolizer.prototype.initialize.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Symbolizer.Point"
    
});

/* ======================================================================
    OpenLayers/Symbolizer/Line.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Symbolizer.js
 */

/**
 * Class: OpenLayers.Symbolizer.Line
 * A symbolizer used to render line features.
 */
OpenLayers.Symbolizer.Line = OpenLayers.Class(OpenLayers.Symbolizer, {

    /**
     * APIProperty: strokeColor
     * {String} Color for line stroke.  This is a RGB hex value (e.g. "#ff0000"
     *     for red).  
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeOpacity
     * {Number} Stroke opacity (0-1).
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeWidth
     * {Number} Pixel stroke width.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * APIProperty: strokeLinecap
     * {String} Stroke cap type ("butt", "round", or "square").
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * Property: strokeDashstyle
     * {String} Stroke dash style according to the SLD spec. Note that the
     *     OpenLayers values for strokeDashstyle ("dot", "dash", "dashdot",
     *     "longdash", "longdashdot", or "solid") will not work in SLD, but
     *     most SLD patterns will render correctly in OpenLayers.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * Constructor: OpenLayers.Symbolizer.Line
     * Create a symbolizer for rendering lines.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     symbolizer.  Any documented symbolizer property can be set at 
     *     construction.
     *
     * Returns:
     * A new line symbolizer.
     */
    initialize: function(config) {
        OpenLayers.Symbolizer.prototype.initialize.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Symbolizer.Line"
    
});

/* ======================================================================
    OpenLayers/Symbolizer/Text.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Symbolizer.js
 */

/**
 * Class: OpenLayers.Symbolizer.Text
 * A symbolizer used to render text labels for features.
 */
OpenLayers.Symbolizer.Text = OpenLayers.Class(OpenLayers.Symbolizer, {
    
    /** 
     * APIProperty: label
     * {String} The text for the label.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /** 
     * APIProperty: fontFamily
     * {String} The font family for the label.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /** 
     * APIProperty: fontSize
     * {String} The font size for the label.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /** 
     * APIProperty: fontWeight
     * {String} The font weight for the label.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */
    
    /**
     * Property: fontStyle
     * {String} The font style for the label.
     * 
     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
     */

    /**
     * Constructor: OpenLayers.Symbolizer.Text
     * Create a symbolizer for rendering text labels.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     symbolizer.  Any documented symbolizer property can be set at 
     *     construction.
     *
     * Returns:
     * A new text symbolizer.
     */
    initialize: function(config) {
        OpenLayers.Symbolizer.prototype.initialize.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Symbolizer.Text"
    
});

/* ======================================================================
    OpenLayers/Format/SLD/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Rule.js
 * @requires OpenLayers/Format/SLD.js
 * @requires OpenLayers/Format/Filter/v1_0_0.js
 * @requires OpenLayers/Symbolizer/Point.js
 * @requires OpenLayers/Symbolizer/Line.js
 * @requires OpenLayers/Symbolizer/Polygon.js
 * @requires OpenLayers/Symbolizer/Text.js
 * @requires OpenLayers/Symbolizer/Raster.js
 */

/**
 * Class: OpenLayers.Format.SLD.v1
 * Superclass for SLD version 1 parsers.
 *
 * Inherits from:
 *  - <OpenLayers.Format.Filter.v1_0_0>
 */
OpenLayers.Format.SLD.v1 = OpenLayers.Class(OpenLayers.Format.Filter.v1_0_0, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        sld: "http://www.opengis.net/sld",
        ogc: "http://www.opengis.net/ogc",
        gml: "http://www.opengis.net/gml",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },
    
    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "sld",

    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocation: null,
    
    /** 
     * APIProperty: multipleSymbolizers
     * {Boolean} Support multiple symbolizers per rule.  Default is false.  if
     *     true, an OpenLayers.Style2 instance will be created to represent 
     *     user styles instead of an OpenLayers.Style instace.  The 
     *     OpenLayers.Style2 class allows collections of rules with multiple
     *     symbolizers, but is not currently useful for client side rendering.
     *     If multiple symbolizers is true, multiple FeatureTypeStyle elements
     *     are preserved in reading/writing by setting symbolizer zIndex values.
     *     In addition, the <defaultSymbolizer> property is ignored if 
     *     multiple symbolizers are supported (defaults should be applied
     *     when rendering).
     */
    multipleSymbolizers: false,

    /**
     * Property: featureTypeCounter
     * {Number} Private counter for multiple feature type styles.
     */
    featureTypeCounter: null,

    /**
     * APIProperty: defaultSymbolizer.
     * {Object} A symbolizer with the SLD defaults.
     */
    defaultSymbolizer: {
        fillColor: "#808080",
        fillOpacity: 1,
        strokeColor: "#000000",
        strokeOpacity: 1,
        strokeWidth: 1,
        strokeDashstyle: "solid",
        pointRadius: 3,
        graphicName: "square"
    },
    
    /**
     * Constructor: OpenLayers.Format.SLD.v1
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.SLD> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * Method: read
     *
     * Parameters:
     * data - {DOMElement} An SLD document element.
     * options - {Object} Options for the reader.
     *
     * Valid options:
     * namedLayersAsArray - {Boolean}  Generate a namedLayers array.  If false,
     *     the namedLayers property value will be an object keyed by layer name.
     *     Default is false.
     *
     * Returns:
     * {Object} An object representing the SLD.
     */
    read: function(data, options) {
        options = OpenLayers.Util.applyDefaults(options, this.options);
        var sld = {
            namedLayers: options.namedLayersAsArray === true ? [] : {}
        };
        this.readChildNodes(data, sld);
        return sld;
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: OpenLayers.Util.applyDefaults({
        "sld": {
            "StyledLayerDescriptor": function(node, sld) {
                sld.version = node.getAttribute("version");
                this.readChildNodes(node, sld);
            },
            "Name": function(node, obj) {
                obj.name = this.getChildValue(node);
            },
            "Title": function(node, obj) {
                obj.title = this.getChildValue(node);
            },
            "Abstract": function(node, obj) {
                obj.description = this.getChildValue(node);
            },
            "NamedLayer": function(node, sld) {
                var layer = {
                    userStyles: [],
                    namedStyles: []
                };
                this.readChildNodes(node, layer);
                // give each of the user styles this layer name
                for(var i=0, len=layer.userStyles.length; i<len; ++i) {
                    layer.userStyles[i].layerName = layer.name;
                }
                if(OpenLayers.Util.isArray(sld.namedLayers)) {
                    sld.namedLayers.push(layer);                
                } else {
                    sld.namedLayers[layer.name] = layer;
                }
            },
            "NamedStyle": function(node, layer) {
                layer.namedStyles.push(
                    this.getChildName(node.firstChild)
                );
            },
            "UserStyle": function(node, layer) {
                var obj = {defaultsPerSymbolizer: true, rules: []};
                this.featureTypeCounter = -1;
                this.readChildNodes(node, obj);
                var style;
                if (this.multipleSymbolizers) {
                    delete obj.defaultsPerSymbolizer;
                    style = new OpenLayers.Style2(obj);
                } else {
                    style = new OpenLayers.Style(this.defaultSymbolizer, obj);
                }
                layer.userStyles.push(style);
            },
            "IsDefault": function(node, style) {
                if(this.getChildValue(node) == "1") {
                    style.isDefault = true;
                }
            },
            "FeatureTypeStyle": function(node, style) {
                ++this.featureTypeCounter;
                var obj = {
                    rules: this.multipleSymbolizers ? style.rules : []
                };
                this.readChildNodes(node, obj);
                if (!this.multipleSymbolizers) {
                    style.rules = obj.rules;
                }
            },
            "Rule": function(node, obj) {
                var config;
                if (this.multipleSymbolizers) {
                    config = {symbolizers: []};
                }
                var rule = new OpenLayers.Rule(config);
                this.readChildNodes(node, rule);
                obj.rules.push(rule);
            },
            "ElseFilter": function(node, rule) {
                rule.elseFilter = true;
            },
            "MinScaleDenominator": function(node, rule) {
                rule.minScaleDenominator = parseFloat(this.getChildValue(node));
            },
            "MaxScaleDenominator": function(node, rule) {
                rule.maxScaleDenominator = parseFloat(this.getChildValue(node));
            },
            "TextSymbolizer": function(node, rule) {
                var config = {};
                this.readChildNodes(node, config);
                if (this.multipleSymbolizers) {
                    config.zIndex = this.featureTypeCounter;
                    rule.symbolizers.push(
                        new OpenLayers.Symbolizer.Text(config)
                    );
                } else {
                    rule.symbolizer["Text"] = OpenLayers.Util.applyDefaults(
                        config, rule.symbolizer["Text"]
                    );
                }
            },
            "LabelPlacement": function(node, symbolizer) {
                this.readChildNodes(node, symbolizer);
            },
            "PointPlacement": function(node, symbolizer) {
                var config = {};
                this.readChildNodes(node, config);
                config.labelRotation = config.rotation;
                delete config.rotation;
                var labelAlign,
                    x = symbolizer.labelAnchorPointX,
                    y = symbolizer.labelAnchorPointY;
                if (x <= 1/3) {
                    labelAlign = 'l';
                } else if (x > 1/3 && x < 2/3) {
                    labelAlign = 'c';
                } else if (x >= 2/3) {
                    labelAlign = 'r';
                }
                if (y <= 1/3) {
                    labelAlign += 'b';
                } else if (y > 1/3 && y < 2/3) {
                    labelAlign += 'm';
                } else if (y >= 2/3) {
                    labelAlign += 't';
                }
                config.labelAlign = labelAlign;
                OpenLayers.Util.applyDefaults(symbolizer, config);
            },
            "AnchorPoint": function(node, symbolizer) {
                this.readChildNodes(node, symbolizer);
            },
            "AnchorPointX": function(node, symbolizer) {
                var labelAnchorPointX = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(labelAnchorPointX) {
                    symbolizer.labelAnchorPointX = labelAnchorPointX;
                }
            },
            "AnchorPointY": function(node, symbolizer) {
                var labelAnchorPointY = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(labelAnchorPointY) {
                    symbolizer.labelAnchorPointY = labelAnchorPointY;
                }
            },
            "Displacement": function(node, symbolizer) {
                this.readChildNodes(node, symbolizer);
            },
            "DisplacementX": function(node, symbolizer) {
                var labelXOffset = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(labelXOffset) {
                    symbolizer.labelXOffset = labelXOffset;
                }
            },
            "DisplacementY": function(node, symbolizer) {
                var labelYOffset = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(labelYOffset) {
                    symbolizer.labelYOffset = labelYOffset;
                }
            },
            "LinePlacement": function(node, symbolizer) {
                this.readChildNodes(node, symbolizer);
            },
            "PerpendicularOffset": function(node, symbolizer) {
                var labelPerpendicularOffset = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(labelPerpendicularOffset) {
                    symbolizer.labelPerpendicularOffset = labelPerpendicularOffset;
                }
            },
            "Label": function(node, symbolizer) {
                var value = this.readers.ogc._expression.call(this, node);
                if (value) {
                    symbolizer.label = value;
                }
            },
            "Font": function(node, symbolizer) {
                this.readChildNodes(node, symbolizer);
            },
            "Halo": function(node, symbolizer) {
                // halo has a fill, so send fresh object
                var obj = {};
                this.readChildNodes(node, obj);
                symbolizer.haloRadius = obj.haloRadius;
                symbolizer.haloColor = obj.fillColor;
                symbolizer.haloOpacity = obj.fillOpacity;
            },
            "Radius": function(node, symbolizer) {
                var radius = this.readers.ogc._expression.call(this, node);
                if(radius != null) {
                    // radius is only used for halo
                    symbolizer.haloRadius = radius;
                }
            },
            "RasterSymbolizer": function(node, rule) {
                var config = {};
                this.readChildNodes(node, config);
                if (this.multipleSymbolizers) {
                    config.zIndex = this.featureTypeCounter;
                    rule.symbolizers.push(
                        new OpenLayers.Symbolizer.Raster(config)
                    );
                } else {
                    rule.symbolizer["Raster"] = OpenLayers.Util.applyDefaults(
                        config, rule.symbolizer["Raster"]
                    );
                }
            },
            "Geometry": function(node, obj) {
                obj.geometry = {};
                this.readChildNodes(node, obj.geometry);
            },
            "ColorMap": function(node, symbolizer) {
                symbolizer.colorMap = [];
                this.readChildNodes(node, symbolizer.colorMap);
            },
            "ColorMapEntry": function(node, colorMap) {
                var q = node.getAttribute("quantity");
                var o = node.getAttribute("opacity");
                colorMap.push({
                    color: node.getAttribute("color"),
                    quantity: q !== null ? parseFloat(q) : undefined,
                    label: node.getAttribute("label") || undefined,
                    opacity: o !== null ? parseFloat(o) : undefined
                });
            },
            "LineSymbolizer": function(node, rule) {
                var config = {};
                this.readChildNodes(node, config);
                if (this.multipleSymbolizers) {
                    config.zIndex = this.featureTypeCounter;
                    rule.symbolizers.push(
                        new OpenLayers.Symbolizer.Line(config)
                    );
                } else {
                    rule.symbolizer["Line"] = OpenLayers.Util.applyDefaults(
                        config, rule.symbolizer["Line"]
                    );
                }
            },
            "PolygonSymbolizer": function(node, rule) {
                var config = {
                    fill: false,
                    stroke: false
                };
                if (!this.multipleSymbolizers) {
                    config = rule.symbolizer["Polygon"] || config;
                }
                this.readChildNodes(node, config);
                if (this.multipleSymbolizers) {
                    config.zIndex = this.featureTypeCounter;
                    rule.symbolizers.push(
                        new OpenLayers.Symbolizer.Polygon(config)
                    );
                } else {
                    rule.symbolizer["Polygon"] = config;
                }
            },
            "PointSymbolizer": function(node, rule) {
                var config = {
                    fill: false,
                    stroke: false,
                    graphic: false
                };
                if (!this.multipleSymbolizers) {
                    config = rule.symbolizer["Point"] || config;
                }
                this.readChildNodes(node, config);
                if (this.multipleSymbolizers) {
                    config.zIndex = this.featureTypeCounter;
                    rule.symbolizers.push(
                        new OpenLayers.Symbolizer.Point(config)
                    );
                } else {
                    rule.symbolizer["Point"] = config;
                }
            },
            "Stroke": function(node, symbolizer) {
                symbolizer.stroke = true;
                this.readChildNodes(node, symbolizer);
            },
            "Fill": function(node, symbolizer) {
                symbolizer.fill = true;
                this.readChildNodes(node, symbolizer);
            },
            "CssParameter": function(node, symbolizer) {
                var cssProperty = node.getAttribute("name");
                var symProperty = this.cssMap[cssProperty];
                // for labels, fill should map to fontColor and fill-opacity 
                // to fontOpacity
                if (symbolizer.label) {
                    if (cssProperty === 'fill') {
                        symProperty = "fontColor";
                    } else if (cssProperty === 'fill-opacity') {
                        symProperty = "fontOpacity";
                    }
                }
                if(symProperty) {
                    // Limited support for parsing of OGC expressions
                    var value = this.readers.ogc._expression.call(this, node);
                    // always string, could be an empty string
                    if(value) {
                        symbolizer[symProperty] = value;
                    }
                }
            },
            "Graphic": function(node, symbolizer) {
                symbolizer.graphic = true;
                var graphic = {};
                // painter's order not respected here, clobber previous with next
                this.readChildNodes(node, graphic);
                // directly properties with names that match symbolizer properties
                var properties = [
                    "stroke", "strokeColor", "strokeWidth", "strokeOpacity",
                    "strokeLinecap", "fill", "fillColor", "fillOpacity",
                    "graphicName", "rotation", "graphicFormat"
                ];
                var prop, value;
                for(var i=0, len=properties.length; i<len; ++i) {
                    prop = properties[i];
                    value = graphic[prop];
                    if(value != undefined) {
                        symbolizer[prop] = value;
                    }
                }
                // set other generic properties with specific graphic property names
                if(graphic.opacity != undefined) {
                    symbolizer.graphicOpacity = graphic.opacity;
                }
                if(graphic.size != undefined) {
                    var pointRadius = graphic.size / 2;
                    if (isNaN(pointRadius)) {
                        // likely a property name
                        symbolizer.graphicWidth = graphic.size;
                    } else {
                        symbolizer.pointRadius = graphic.size / 2;
                    }
                }
                if(graphic.href != undefined) {
                    symbolizer.externalGraphic = graphic.href;
                }
                if(graphic.rotation != undefined) {
                    symbolizer.rotation = graphic.rotation;
                }
            },
            "ExternalGraphic": function(node, graphic) {
                this.readChildNodes(node, graphic);
            },
            "Mark": function(node, graphic) {
                this.readChildNodes(node, graphic);
            },
            "WellKnownName": function(node, graphic) {
                graphic.graphicName = this.getChildValue(node);
            },
            "Opacity": function(node, obj) {
                var opacity = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(opacity) {
                    obj.opacity = opacity;
                }
            },
            "Size": function(node, obj) {
                var size = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(size) {
                    obj.size = size;
                }
            },
            "Rotation": function(node, obj) {
                var rotation = this.readers.ogc._expression.call(this, node);
                // always string, could be empty string
                if(rotation) {
                    obj.rotation = rotation;
                }
            },
            "OnlineResource": function(node, obj) {
                obj.href = this.getAttributeNS(
                    node, this.namespaces.xlink, "href"
                );
            },
            "Format": function(node, graphic) {
                graphic.graphicFormat = this.getChildValue(node);
            }
        }
    }, OpenLayers.Format.Filter.v1_0_0.prototype.readers),
    
    /**
     * Property: cssMap
     * {Object} Object mapping supported css property names to OpenLayers
     *     symbolizer property names.
     */
    cssMap: {
        "stroke": "strokeColor",
        "stroke-opacity": "strokeOpacity",
        "stroke-width": "strokeWidth",
        "stroke-linecap": "strokeLinecap",
        "stroke-dasharray": "strokeDashstyle",
        "fill": "fillColor",
        "fill-opacity": "fillOpacity",
        "font-family": "fontFamily",
        "font-size": "fontSize",
        "font-weight": "fontWeight",
        "font-style": "fontStyle"
    },
    
    /**
     * Method: getCssProperty
     * Given a symbolizer property, get the corresponding CSS property
     *     from the <cssMap>.
     *
     * Parameters:
     * sym - {String} A symbolizer property name.
     *
     * Returns:
     * {String} A CSS property name or null if none found.
     */
    getCssProperty: function(sym) {
        var css = null;
        for(var prop in this.cssMap) {
            if(this.cssMap[prop] == sym) {
                css = prop;
                break;
            }
        }
        return css;
    },
    
    /**
     * Method: getGraphicFormat
     * Given a href for an external graphic, try to determine the mime-type.
     *     This method doesn't try too hard, and will fall back to
     *     <defaultGraphicFormat> if one of the known <graphicFormats> is not
     *     the file extension of the provided href.
     *
     * Parameters:
     * href - {String}
     *
     * Returns:
     * {String} The graphic format.
     */
    getGraphicFormat: function(href) {
        var format, regex;
        for(var key in this.graphicFormats) {
            if(this.graphicFormats[key].test(href)) {
                format = key;
                break;
            }
        }
        return format || this.defaultGraphicFormat;
    },
    
    /**
     * Property: defaultGraphicFormat
     * {String} If none other can be determined from <getGraphicFormat>, this
     *     default will be returned.
     */
    defaultGraphicFormat: "image/png",
    
    /**
     * Property: graphicFormats
     * {Object} Mapping of image mime-types to regular extensions matching 
     *     well-known file extensions.
     */
    graphicFormats: {
        "image/jpeg": /\.jpe?g$/i,
        "image/gif": /\.gif$/i,
        "image/png": /\.png$/i
    },

    /**
     * Method: write
     *
     * Parameters:
     * sld - {Object} An object representing the SLD.
     *
     * Returns:
     * {DOMElement} The root of an SLD document.
     */
    write: function(sld) {
        return this.writers.sld.StyledLayerDescriptor.apply(this, [sld]);
    },
    
    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: OpenLayers.Util.applyDefaults({
        "sld": {
            "_OGCExpression": function(nodeName, value) {
                // only the simplest of ogc:expression handled
                // {label: "some text and a ${propertyName}"}
                var node = this.createElementNSPlus(nodeName);
                var tokens = typeof value == "string" ?
                    value.split("${") :
                    [value];
                node.appendChild(this.createTextNode(tokens[0]));
                var item, last;
                for(var i=1, len=tokens.length; i<len; i++) {
                    item = tokens[i];
                    last = item.indexOf("}"); 
                    if(last > 0) {
                        this.writeNode(
                            "ogc:PropertyName",
                            {property: item.substring(0, last)},
                            node
                        );
                        node.appendChild(
                            this.createTextNode(item.substring(++last))
                        );
                    } else {
                        // no ending }, so this is a literal ${
                        node.appendChild(
                            this.createTextNode("${" + item)
                        );
                    }
                }
                return node;
            },
            "StyledLayerDescriptor": function(sld) {
                var root = this.createElementNSPlus(
                    "sld:StyledLayerDescriptor",
                    {attributes: {
                        "version": this.VERSION,
                        "xsi:schemaLocation": this.schemaLocation
                    }}
                );

                // For ArcGIS Server it is necessary to define this
                // at the root level (see ticket:2166).
                root.setAttribute("xmlns:ogc", this.namespaces.ogc);
                root.setAttribute("xmlns:gml", this.namespaces.gml);

                // add in optional name
                if(sld.name) {
                    this.writeNode("Name", sld.name, root);
                }
                // add in optional title
                if(sld.title) {
                    this.writeNode("Title", sld.title, root);
                }
                // add in optional description
                if(sld.description) {
                    this.writeNode("Abstract", sld.description, root);
                }
                // add in named layers
                // allow namedLayers to be an array
                if(OpenLayers.Util.isArray(sld.namedLayers)) {
                    for(var i=0, len=sld.namedLayers.length; i<len; ++i) {
                        this.writeNode("NamedLayer", sld.namedLayers[i], root);
                    }
                } else {
                    for(var name in sld.namedLayers) {
                        this.writeNode("NamedLayer", sld.namedLayers[name], root);
                    }
                }
                return root;
            },
            "Name": function(name) {
                return this.createElementNSPlus("sld:Name", {value: name});
            },
            "Title": function(title) {
                return this.createElementNSPlus("sld:Title", {value: title});
            },
            "Abstract": function(description) {
                return this.createElementNSPlus(
                    "sld:Abstract", {value: description}
                );
            },
            "NamedLayer": function(layer) {
                var node = this.createElementNSPlus("sld:NamedLayer");

                // add in required name
                this.writeNode("Name", layer.name, node);

                // optional sld:LayerFeatureConstraints here

                // add in named styles
                if(layer.namedStyles) {
                    for(var i=0, len=layer.namedStyles.length; i<len; ++i) {
                        this.writeNode(
                            "NamedStyle", layer.namedStyles[i], node
                        );
                    }
                }
                
                // add in user styles
                if(layer.userStyles) {
                    for(var i=0, len=layer.userStyles.length; i<len; ++i) {
                        this.writeNode(
                            "UserStyle", layer.userStyles[i], node
                        );
                    }
                }
                
                return node;
            },
            "NamedStyle": function(name) {
                var node = this.createElementNSPlus("sld:NamedStyle");
                this.writeNode("Name", name, node);
                return node;
            },
            "UserStyle": function(style) {
                var node = this.createElementNSPlus("sld:UserStyle");

                // add in optional name
                if(style.name) {
                    this.writeNode("Name", style.name, node);
                }
                // add in optional title
                if(style.title) {
                    this.writeNode("Title", style.title, node);
                }
                // add in optional description
                if(style.description) {
                    this.writeNode("Abstract", style.description, node);
                }
                
                // add isdefault
                if(style.isDefault) {
                    this.writeNode("IsDefault", style.isDefault, node);
                }
                
                // add FeatureTypeStyles
                if (this.multipleSymbolizers && style.rules) {
                    // group style objects by symbolizer zIndex
                    var rulesByZ = {
                        0: []
                    };
                    var zValues = [0];
                    var rule, ruleMap, symbolizer, zIndex, clone;
                    for (var i=0, ii=style.rules.length; i<ii; ++i) {
                        rule = style.rules[i];
                        if (rule.symbolizers) {
                            ruleMap = {};
                            for (var j=0, jj=rule.symbolizers.length; j<jj; ++j) {
                                symbolizer = rule.symbolizers[j];
                                zIndex = symbolizer.zIndex;
                                if (!(zIndex in ruleMap)) {
                                    clone = rule.clone();
                                    clone.symbolizers = [];
                                    ruleMap[zIndex] = clone;
                                }
                                ruleMap[zIndex].symbolizers.push(symbolizer.clone());
                            }
                            for (zIndex in ruleMap) {
                                if (!(zIndex in rulesByZ)) {
                                    zValues.push(zIndex);
                                    rulesByZ[zIndex] = [];
                                }
                                rulesByZ[zIndex].push(ruleMap[zIndex]);
                            }
                        } else {
                            // no symbolizers in rule
                            rulesByZ[0].push(rule.clone());
                        }
                    }
                    // write one FeatureTypeStyle per zIndex
                    zValues.sort();
                    var rules;
                    for (var i=0, ii=zValues.length; i<ii; ++i) {
                        rules = rulesByZ[zValues[i]];
                        if (rules.length > 0) {
                            clone = style.clone();
                            clone.rules = rulesByZ[zValues[i]];
                            this.writeNode("FeatureTypeStyle", clone, node);
                        }
                    }                    
                } else {
                    this.writeNode("FeatureTypeStyle", style, node);
                }
                
                return node;
            },
            "IsDefault": function(bool) {
                return this.createElementNSPlus(
                    "sld:IsDefault", {value: (bool) ? "1" : "0"}
                );
            },
            "FeatureTypeStyle": function(style) {
                var node = this.createElementNSPlus("sld:FeatureTypeStyle");
                
                // OpenLayers currently stores no Name, Title, Abstract,
                // FeatureTypeName, or SemanticTypeIdentifier information
                // related to FeatureTypeStyle
                
                // add in rules
                for(var i=0, len=style.rules.length; i<len; ++i) {
                    this.writeNode("Rule", style.rules[i], node);
                }
                
                return node;
            },
            "Rule": function(rule) {
                var node = this.createElementNSPlus("sld:Rule");

                // add in optional name
                if(rule.name) {
                    this.writeNode("Name", rule.name, node);
                }
                // add in optional title
                if(rule.title) {
                    this.writeNode("Title", rule.title, node);
                }
                // add in optional description
                if(rule.description) {
                    this.writeNode("Abstract", rule.description, node);
                }
                
                // add in LegendGraphic here
                
                // add in optional filters
                if(rule.elseFilter) {
                    this.writeNode("ElseFilter", null, node);
                } else if(rule.filter) {
                    this.writeNode("ogc:Filter", rule.filter, node);
                }
                
                // add in scale limits
                if(rule.minScaleDenominator != undefined) {
                    this.writeNode(
                        "MinScaleDenominator", rule.minScaleDenominator, node
                    );
                }
                if(rule.maxScaleDenominator != undefined) {
                    this.writeNode(
                        "MaxScaleDenominator", rule.maxScaleDenominator, node
                    );
                }
                
                var type, symbolizer;
                if (this.multipleSymbolizers && rule.symbolizers) {
                    var symbolizer;
                    for (var i=0, ii=rule.symbolizers.length; i<ii; ++i) {
                        symbolizer = rule.symbolizers[i];
                        type = symbolizer.CLASS_NAME.split(".").pop();
                        this.writeNode(
                            type + "Symbolizer", symbolizer, node
                        );
                    }
                } else {
                    // add in symbolizers (relies on geometry type keys)
                    var types = OpenLayers.Style.SYMBOLIZER_PREFIXES;
                    for(var i=0, len=types.length; i<len; ++i) {
                        type = types[i];
                        symbolizer = rule.symbolizer[type];
                        if(symbolizer) {
                            this.writeNode(
                                type + "Symbolizer", symbolizer, node
                            );
                        }
                    }
                }
                return node;

            },
            "ElseFilter": function() {
                return this.createElementNSPlus("sld:ElseFilter");
            },
            "MinScaleDenominator": function(scale) {
                return this.createElementNSPlus(
                    "sld:MinScaleDenominator", {value: scale}
                );
            },
            "MaxScaleDenominator": function(scale) {
                return this.createElementNSPlus(
                    "sld:MaxScaleDenominator", {value: scale}
                );
            },
            "LineSymbolizer": function(symbolizer) {
                var node = this.createElementNSPlus("sld:LineSymbolizer");
                this.writeNode("Stroke", symbolizer, node);
                return node;
            },
            "Stroke": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Stroke");

                // GraphicFill here
                // GraphicStroke here

                // add in CssParameters
                if(symbolizer.strokeColor != undefined) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "strokeColor"},
                        node
                    );
                }
                if(symbolizer.strokeOpacity != undefined) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "strokeOpacity"},
                        node
                    );
                }
                if(symbolizer.strokeWidth != undefined) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "strokeWidth"},
                        node
                    );
                }
                if(symbolizer.strokeDashstyle != undefined && symbolizer.strokeDashstyle !== "solid") {
                    // assumes valid stroke-dasharray value
                    this.writeNode(
                        "CssParameter", 
                        {symbolizer: symbolizer, key: "strokeDashstyle"},
                        node
                    );
                }
                if(symbolizer.strokeLinecap != undefined) {
                    this.writeNode(
                        "CssParameter", 
                        {symbolizer: symbolizer, key: "strokeLinecap"},
                        node
                    );
                }
                return node;
            },
            "CssParameter": function(obj) {
                // not handling ogc:expressions for now
                return this.createElementNSPlus("sld:CssParameter", {
                    attributes: {name: this.getCssProperty(obj.key)},
                    value: obj.symbolizer[obj.key]
                });
            },
            "TextSymbolizer": function(symbolizer) {
                var node = this.createElementNSPlus("sld:TextSymbolizer");
                // add in optional Label
                if(symbolizer.label != null) {
                    this.writeNode("Label", symbolizer.label, node);
                }
                // add in optional Font
                if(symbolizer.fontFamily != null ||
                    symbolizer.fontSize != null ||
                    symbolizer.fontWeight != null ||
                    symbolizer.fontStyle != null) {
                        this.writeNode("Font", symbolizer, node);
                }
                // add in optional LabelPlacement
                if (symbolizer.labelAnchorPointX != null ||
                    symbolizer.labelAnchorPointY != null || 
                    symbolizer.labelAlign != null ||
                    symbolizer.labelXOffset != null ||
                    symbolizer.labelYOffset != null ||
                    symbolizer.labelRotation != null ||
                    symbolizer.labelPerpendicularOffset != null) {
                        this.writeNode("LabelPlacement", symbolizer, node);
                }
                // add in optional Halo
                if(symbolizer.haloRadius != null ||
                    symbolizer.haloColor != null ||
                    symbolizer.haloOpacity != null) {
                        this.writeNode("Halo", symbolizer, node);
                }
                // add in optional Fill
                if(symbolizer.fontColor != null ||
                   symbolizer.fontOpacity != null) {
                    this.writeNode("Fill", {
                        fillColor: symbolizer.fontColor,
                        fillOpacity: symbolizer.fontOpacity
                    }, node);
                }
                return node;
            },
            "LabelPlacement": function(symbolizer) {
                var node = this.createElementNSPlus("sld:LabelPlacement");
                // PointPlacement and LinePlacement are choices, so don't output both
                if ((symbolizer.labelAnchorPointX != null ||
                    symbolizer.labelAnchorPointY != null ||
                    symbolizer.labelAlign != null ||
                    symbolizer.labelXOffset != null ||
                    symbolizer.labelYOffset != null ||
                    symbolizer.labelRotation != null) && 
                    symbolizer.labelPerpendicularOffset == null) {
                        this.writeNode("PointPlacement", symbolizer, node);
                }
                if (symbolizer.labelPerpendicularOffset != null) {
                    this.writeNode("LinePlacement", symbolizer, node);
                }
                return node;
            },
            "LinePlacement": function(symbolizer) {
                var node = this.createElementNSPlus("sld:LinePlacement");
                this.writeNode("PerpendicularOffset", symbolizer.labelPerpendicularOffset, node);
                return node;
            },
            "PerpendicularOffset": function(value) {
                return this.createElementNSPlus("sld:PerpendicularOffset", {
                    value: value
                });
            },
            "PointPlacement": function(symbolizer) {
                var node = this.createElementNSPlus("sld:PointPlacement");
                if (symbolizer.labelAnchorPointX != null ||
                    symbolizer.labelAnchorPointY != null ||
                    symbolizer.labelAlign != null) {
                        this.writeNode("AnchorPoint", symbolizer, node);
                }
                if (symbolizer.labelXOffset != null ||
                    symbolizer.labelYOffset != null) {
                        this.writeNode("Displacement", symbolizer, node);
                }
                if (symbolizer.labelRotation != null) {
                    this.writeNode("Rotation", symbolizer.labelRotation, node);
                }
                return node;
            },
            "AnchorPoint": function(symbolizer) {
                var node = this.createElementNSPlus("sld:AnchorPoint");
                var x = symbolizer.labelAnchorPointX,
                    y = symbolizer.labelAnchorPointY;
                if (x != null) {
                    this.writeNode("AnchorPointX", x, node);
                }
                if (y != null) {
                    this.writeNode("AnchorPointY", y, node);
                }
                if (x == null && y == null) {
                    var xAlign = symbolizer.labelAlign.substr(0, 1),
                        yAlign = symbolizer.labelAlign.substr(1, 1);
                    if (xAlign === "l") {
                        x = 0;
                    } else if (xAlign === "c") {
                        x = 0.5;
                    } else if (xAlign === "r") {
                        x = 1;
                    }
                    if (yAlign === "b") {
                        y = 0;
                    } else if (yAlign === "m") {
                        y = 0.5;
                    } else if (yAlign === "t") {
                        y = 1;
                    }
                    this.writeNode("AnchorPointX", x, node);
                    this.writeNode("AnchorPointY", y, node);
                }
                return node;
            },
            "AnchorPointX": function(value) {
                return this.createElementNSPlus("sld:AnchorPointX", {
                    value: value
                }); 
            },
            "AnchorPointY": function(value) {
                return this.createElementNSPlus("sld:AnchorPointY", {
                    value: value
                });
            },
            "Displacement": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Displacement");
                if (symbolizer.labelXOffset != null) {
                    this.writeNode("DisplacementX", symbolizer.labelXOffset, node);
                }
                if (symbolizer.labelYOffset != null) {
                    this.writeNode("DisplacementY", symbolizer.labelYOffset, node);
                }
                return node;
            },
            "DisplacementX": function(value) {
                return this.createElementNSPlus("sld:DisplacementX", {
                    value: value
                });
            },
            "DisplacementY": function(value) {
                return this.createElementNSPlus("sld:DisplacementY", {
                    value: value
                });
            },
            "Font": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Font");
                // add in CssParameters
                if(symbolizer.fontFamily) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "fontFamily"},
                        node
                    );
                }
                if(symbolizer.fontSize) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "fontSize"},
                        node
                    );
                }
                if(symbolizer.fontWeight) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "fontWeight"},
                        node
                    );
                }
                if(symbolizer.fontStyle) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "fontStyle"},
                        node
                    );
                }
                return node;
            },
            "Label": function(label) {
                return this.writers.sld._OGCExpression.call(
                    this, "sld:Label", label
                );
            },
            "Halo": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Halo");
                if(symbolizer.haloRadius) {
                    this.writeNode("Radius", symbolizer.haloRadius, node);
                }
                if(symbolizer.haloColor || symbolizer.haloOpacity) {
                    this.writeNode("Fill", {
                        fillColor: symbolizer.haloColor,
                        fillOpacity: symbolizer.haloOpacity
                    }, node);
                }
                return node;
            },
            "Radius": function(value) {
                return this.createElementNSPlus("sld:Radius", {
                    value: value
                });
            },
            "RasterSymbolizer": function(symbolizer) {
                var node = this.createElementNSPlus("sld:RasterSymbolizer");
                if (symbolizer.geometry) {
                    this.writeNode("Geometry", symbolizer.geometry, node);
                }
                if (symbolizer.opacity) {
                    this.writeNode("Opacity", symbolizer.opacity, node);
                }
                if (symbolizer.colorMap) {
                    this.writeNode("ColorMap", symbolizer.colorMap, node);
                }
                return node;
            },
            "Geometry": function(geometry) {
                var node = this.createElementNSPlus("sld:Geometry");
                if (geometry.property) {
                    this.writeNode("ogc:PropertyName", geometry, node);
                }
                return node;
            },
            "ColorMap": function(colorMap) {
                var node = this.createElementNSPlus("sld:ColorMap");
                for (var i=0, len=colorMap.length; i<len; ++i) {
                    this.writeNode("ColorMapEntry", colorMap[i], node);
                }
                return node;
            },
            "ColorMapEntry": function(colorMapEntry) {
                var node = this.createElementNSPlus("sld:ColorMapEntry");
                var a = colorMapEntry;
                node.setAttribute("color", a.color);
                a.opacity !== undefined && node.setAttribute("opacity",
                    parseFloat(a.opacity));
                a.quantity !== undefined && node.setAttribute("quantity",
                    parseFloat(a.quantity));
                a.label !== undefined && node.setAttribute("label", a.label);
                return node;
            },
            "PolygonSymbolizer": function(symbolizer) {
                var node = this.createElementNSPlus("sld:PolygonSymbolizer");
                if(symbolizer.fill !== false) {
                    this.writeNode("Fill", symbolizer, node);
                }
                if(symbolizer.stroke !== false) {
                    this.writeNode("Stroke", symbolizer, node);
                }
                return node;
            },
            "Fill": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Fill");
                
                // GraphicFill here
                
                // add in CssParameters
                if(symbolizer.fillColor) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "fillColor"},
                        node
                    );
                }
                if(symbolizer.fillOpacity != null) {
                    this.writeNode(
                        "CssParameter",
                        {symbolizer: symbolizer, key: "fillOpacity"},
                        node
                    );
                }
                return node;
            },
            "PointSymbolizer": function(symbolizer) {
                var node = this.createElementNSPlus("sld:PointSymbolizer");
                this.writeNode("Graphic", symbolizer, node);
                return node;
            },
            "Graphic": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Graphic");
                if(symbolizer.externalGraphic != undefined) {
                    this.writeNode("ExternalGraphic", symbolizer, node);
                } else {
                    this.writeNode("Mark", symbolizer, node);
                }
                
                if(symbolizer.graphicOpacity != undefined) {
                    this.writeNode("Opacity", symbolizer.graphicOpacity, node);
                }
                if(symbolizer.pointRadius != undefined) {
                    this.writeNode("Size", symbolizer.pointRadius * 2, node);
                } else if (symbolizer.graphicWidth != undefined) {
                    this.writeNode("Size", symbolizer.graphicWidth, node);
                }
                if(symbolizer.rotation != undefined) {
                    this.writeNode("Rotation", symbolizer.rotation, node);
                }
                return node;
            },
            "ExternalGraphic": function(symbolizer) {
                var node = this.createElementNSPlus("sld:ExternalGraphic");
                this.writeNode(
                    "OnlineResource", symbolizer.externalGraphic, node
                );
                var format = symbolizer.graphicFormat ||
                             this.getGraphicFormat(symbolizer.externalGraphic);
                this.writeNode("Format", format, node);
                return node;
            },
            "Mark": function(symbolizer) {
                var node = this.createElementNSPlus("sld:Mark");
                if(symbolizer.graphicName) {
                    this.writeNode("WellKnownName", symbolizer.graphicName, node);
                }
                if (symbolizer.fill !== false) {
                    this.writeNode("Fill", symbolizer, node);
                }
                if (symbolizer.stroke !== false) {
                    this.writeNode("Stroke", symbolizer, node);
                }
                return node;
            },
            "WellKnownName": function(name) {
                return this.createElementNSPlus("sld:WellKnownName", {
                    value: name
                });
            },
            "Opacity": function(value) {
                return this.createElementNSPlus("sld:Opacity", {
                    value: value
                });
            },
            "Size": function(value) {
                return this.writers.sld._OGCExpression.call(
                    this, "sld:Size", value
                );
            },
            "Rotation": function(value) {
                return this.createElementNSPlus("sld:Rotation", {
                    value: value
                });
            },
            "OnlineResource": function(href) {
                return this.createElementNSPlus("sld:OnlineResource", {
                    attributes: {
                        "xlink:type": "simple",
                        "xlink:href": href
                    }
                });
            },
            "Format": function(format) {
                return this.createElementNSPlus("sld:Format", {
                    value: format
                });
            }
        }
    }, OpenLayers.Format.Filter.v1_0_0.prototype.writers),
    
    CLASS_NAME: "OpenLayers.Format.SLD.v1" 

});
/* ======================================================================
    OpenLayers/Layer/WMS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.WMS
 * Instances of OpenLayers.Layer.WMS are used to display data from OGC Web
 *     Mapping Services. Create a new WMS layer with the <OpenLayers.Layer.WMS>
 *     constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.WMS = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /**
     * Constant: DEFAULT_PARAMS
     * {Object} Hashtable of default parameter key/value pairs 
     */
    DEFAULT_PARAMS: { service: "WMS",
                      version: "1.1.1",
                      request: "GetMap",
                      styles: "",
                      format: "image/jpeg"
                     },
    
    /**
     * APIProperty: isBaseLayer
     * {Boolean} Default is true for WMS layer
     */
    isBaseLayer: true,
    
    /**
     * APIProperty: encodeBBOX
     * {Boolean} Should the BBOX commas be encoded? The WMS spec says 'no', 
     * but some services want it that way. Default false.
     */
    encodeBBOX: false,
    
    /** 
     * APIProperty: noMagic 
     * {Boolean} If true, the image format will not be automagicaly switched 
     *     from image/jpeg to image/png or image/gif when using 
     *     TRANSPARENT=TRUE. Also isBaseLayer will not changed by the  
     *     constructor. Default false. 
     */ 
    noMagic: false,
    
    /**
     * Property: yx
     * {Object} Keys in this object are EPSG codes for which the axis order
     *     is to be reversed (yx instead of xy, LatLon instead of LonLat), with
     *     true as value. This is only relevant for WMS versions >= 1.3.0, and
     *     only if yx is not set in <OpenLayers.Projection.defaults> for the
     *     used projection.
     */
    yx: {},
    
    /**
     * Constructor: OpenLayers.Layer.WMS
     * Create a new WMS layer object
     *
     * Examples:
     *
     * The code below creates a simple WMS layer using the image/jpeg format.
     * (code)
     * var wms = new OpenLayers.Layer.WMS("NASA Global Mosaic",
     *                                    "http://wms.jpl.nasa.gov/wms.cgi", 
     *                                    {layers: "modis,global_mosaic"});
     * (end)
     * Note the 3rd argument (params). Properties added to this object will be
     * added to the WMS GetMap requests used for this layer's tiles. The only
     * mandatory parameter is "layers". Other common WMS params include
     * "transparent", "styles" and "format". Note that the "srs" param will
     * always be ignored. Instead, it will be derived from the baseLayer's or
     * map's projection.
     *
     * The code below creates a transparent WMS layer with additional options.
     * (code)
     * var wms = new OpenLayers.Layer.WMS("NASA Global Mosaic",
     *                                    "http://wms.jpl.nasa.gov/wms.cgi", 
     *                                    {
     *                                        layers: "modis,global_mosaic",
     *                                        transparent: true
     *                                    }, {
     *                                        opacity: 0.5,
     *                                        singleTile: true
     *                                    });
     * (end)
     * Note that by default, a WMS layer is configured as baseLayer. Setting
     * the "transparent" param to true will apply some magic (see <noMagic>).
     * The default image format changes from image/jpeg to image/png, and the
     * layer is not configured as baseLayer.
     *
     * Parameters:
     * name - {String} A name for the layer
     * url - {String} Base url for the WMS
     *                (e.g. http://wms.jpl.nasa.gov/wms.cgi)
     * params - {Object} An object with key/value pairs representing the
     *                   GetMap query string parameters and parameter values.
     * options - {Object} Hashtable of extra options to tag onto the layer.
     *     These options include all properties listed above, plus the ones
     *     inherited from superclasses.
     */
    initialize: function(name, url, params, options) {
        var newArguments = [];
        //uppercase params
        params = OpenLayers.Util.upperCaseObject(params);
        if (parseFloat(params.VERSION) >= 1.3 && !params.EXCEPTIONS) {
            params.EXCEPTIONS = "INIMAGE";
        } 
        newArguments.push(name, url, params, options);
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
        OpenLayers.Util.applyDefaults(
                       this.params, 
                       OpenLayers.Util.upperCaseObject(this.DEFAULT_PARAMS)
                       );


        //layer is transparent        
        if (!this.noMagic && this.params.TRANSPARENT && 
            this.params.TRANSPARENT.toString().toLowerCase() == "true") {
            
            // unless explicitly set in options, make layer an overlay
            if ( (options == null) || (!options.isBaseLayer) ) {
                this.isBaseLayer = false;
            } 
            
            // jpegs can never be transparent, so intelligently switch the 
            //  format, depending on the browser's capabilities
            if (this.params.FORMAT == "image/jpeg") {
                this.params.FORMAT = OpenLayers.Util.alphaHack() ? "image/gif"
                                                                 : "image/png";
            }
        }

    },    

    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Returns:
     * {<OpenLayers.Layer.WMS>} An exact clone of this layer
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.WMS(this.name,
                                           this.url,
                                           this.params,
                                           this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },    
    
    /**
     * APIMethod: reverseAxisOrder
     * Returns true if the axis order is reversed for the WMS version and
     * projection of the layer.
     * 
     * Returns:
     * {Boolean} true if the axis order is reversed, false otherwise.
     */
    reverseAxisOrder: function() {
        var projCode = this.projection.getCode();
        return parseFloat(this.params.VERSION) >= 1.3 && 
            !!(this.yx[projCode] || OpenLayers.Projection.defaults[projCode].yx);
    },
    
    /**
     * Method: getURL
     * Return a GetMap query string for this layer
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
     *                                request.
     *
     * Returns:
     * {String} A string with the layer's url and parameters and also the
     *          passed-in bounds and appropriate tile size specified as 
     *          parameters.
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        
        var imageSize = this.getImageSize();
        var newParams = {};
        // WMS 1.3 introduced axis order
        var reverseAxisOrder = this.reverseAxisOrder();
        newParams.BBOX = this.encodeBBOX ?
            bounds.toBBOX(null, reverseAxisOrder) :
            bounds.toArray(reverseAxisOrder);
        newParams.WIDTH = imageSize.w;
        newParams.HEIGHT = imageSize.h;
        var requestString = this.getFullRequestString(newParams);
        return requestString;
    },

    /**
     * APIMethod: mergeNewParams
     * Catch changeParams and uppercase the new params to be merged in
     *     before calling changeParams on the super class.
     * 
     *     Once params have been changed, the tiles will be reloaded with
     *     the new parameters.
     * 
     * Parameters:
     * newParams - {Object} Hashtable of new params to use
     */
    mergeNewParams:function(newParams) {
        var upperParams = OpenLayers.Util.upperCaseObject(newParams);
        var newArguments = [upperParams];
        return OpenLayers.Layer.Grid.prototype.mergeNewParams.apply(this, 
                                                             newArguments);
    },

    /** 
     * APIMethod: getFullRequestString
     * Combine the layer's url with its params and these newParams. 
     *   
     *     Add the SRS parameter from projection -- this is probably
     *     more eloquently done via a setProjection() method, but this 
     *     works for now and always.
     *
     * Parameters:
     * newParams - {Object}
     * altUrl - {String} Use this as the url instead of the layer's url
     * 
     * Returns:
     * {String} 
     */
    getFullRequestString:function(newParams, altUrl) {
        var mapProjection = this.map.getProjectionObject();
        var projectionCode = this.projection && this.projection.equals(mapProjection) ?
            this.projection.getCode() :
            mapProjection.getCode();
        var value = (projectionCode == "none") ? null : projectionCode;
        if (parseFloat(this.params.VERSION) >= 1.3) {
            this.params.CRS = value;
        } else {
            this.params.SRS = value;
        }
        
        if (typeof this.params.TRANSPARENT == "boolean") {
            newParams.TRANSPARENT = this.params.TRANSPARENT ? "TRUE" : "FALSE";
        }

        return OpenLayers.Layer.Grid.prototype.getFullRequestString.apply(
                                                    this, arguments);
    },

    CLASS_NAME: "OpenLayers.Layer.WMS"
});
/* ======================================================================
    OpenLayers/Format/WMC/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMC/v1.js
 */

/**
 * Class: OpenLayers.Format.WMC.v1_1_0
 * Read and write WMC version 1.1.0.
 *
 * Differences between 1.1.0 and 1.0.0:
 *     - 1.1.0 Layers have optional sld:MinScaleDenominator and
 *       sld:MaxScaleDenominator
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMC.v1>
 */
OpenLayers.Format.WMC.v1_1_0 = OpenLayers.Class(
    OpenLayers.Format.WMC.v1, {
    
    /**
     * Constant: VERSION
     * {String} 1.1.0
     */
    VERSION: "1.1.0",

    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/context
     *     http://schemas.opengis.net/context/1.1.0/context.xsd
     */
    schemaLocation: "http://www.opengis.net/context http://schemas.opengis.net/context/1.1.0/context.xsd",

    /**
     * Constructor: OpenLayers.Format.WMC.v1_1_0
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.WMC> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.WMC.v1.prototype.initialize.apply(
            this, [options]
        );
    },

    /**
     * Method: read_sld_MinScaleDenominator
     * Read a sld:MinScaleDenominator node.
     *
     * Parameters:
     * layerContext - {Object} An object representing a layer.
     * node - {Element} An element node.
     */
    read_sld_MinScaleDenominator: function(layerContext, node) {
        var minScaleDenominator = parseFloat(this.getChildValue(node));
        if (minScaleDenominator > 0) {
            layerContext.maxScale = minScaleDenominator;
        }
    },

    /**
     * Method: read_sld_MaxScaleDenominator
     * Read a sld:MaxScaleDenominator node.
     *
     * Parameters:
     * layerContext - {Object} An object representing a layer.
     * node - {Element} An element node.
     */
    read_sld_MaxScaleDenominator: function(layerContext, node) {
        layerContext.minScale = parseFloat(this.getChildValue(node));
    },

    /**
     * Method: read_wmc_SRS
     */
    read_wmc_SRS: function(layerContext, node) {
        if (! ("srs" in layerContext)) {
            layerContext.srs = {};
        }
        layerContext.srs[this.getChildValue(node)] = true;
    },

    /**
     * Method: write_wmc_Layer
     * Create a Layer node given a layer context object. This method adds
     *     elements specific to version 1.1.0.
     *
     * Parameters:
     * context - {Object} A layer context object.}
     *
     * Returns:
     * {Element} A WMC Layer element node.
     */
    write_wmc_Layer: function(context) {
        var node = OpenLayers.Format.WMC.v1.prototype.write_wmc_Layer.apply(
            this, [context]
        );
        
        // min/max scale denominator elements go before the 4th element in v1
        if(context.maxScale) {
            var minSD = this.createElementNS(
                this.namespaces.sld, "sld:MinScaleDenominator"
            );
            minSD.appendChild(this.createTextNode(context.maxScale.toPrecision(16)));
            node.appendChild(minSD);
        }
        
        if(context.minScale) {
            var maxSD = this.createElementNS(
                this.namespaces.sld, "sld:MaxScaleDenominator"
            );
            maxSD.appendChild(this.createTextNode(context.minScale.toPrecision(16)));
            node.appendChild(maxSD);
        }

        // optional SRS element(s)
        if (context.srs) {
            for(var name in context.srs) {
                node.appendChild(this.createElementDefaultNS("SRS", name));
            }
        }

        // optional FormatList element
        node.appendChild(this.write_wmc_FormatList(context));

        // optional StyleList element
        node.appendChild(this.write_wmc_StyleList(context));
        
        // optional DimensionList element
        if (context.dimensions) {
            node.appendChild(this.write_wmc_DimensionList(context));
        }

        // OpenLayers specific properties go in an Extension element
        node.appendChild(this.write_wmc_LayerExtension(context));
        
        return node;
        
    },

    CLASS_NAME: "OpenLayers.Format.WMC.v1_1_0" 

});
/* ======================================================================
    OpenLayers/Format/XLS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */

/**
 * Class: OpenLayers.Format.XLS
 * Read/Wite XLS (OpenLS). Create a new instance with the <OpenLayers.Format.XLS>
 *     constructor. Currently only implemented for Location Utility Services, more
 *     specifically only for Geocoding. No support for Reverse Geocoding as yet.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.XLS = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.1.0".
     */
    defaultVersion: "1.1.0",
 
    /**
     * APIProperty: stringifyOutput
     * {Boolean} If true, write will return a string otherwise a DOMElement.
     * Default is true.
     */
    stringifyOutput: true,
    
    /**
     * Constructor: OpenLayers.Format.XLS
     * Create a new parser for XLS.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: write
     * Write out an XLS request.
     *
     * Parameters:
     * request - {Object} An object representing the LUS request.
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} An XLS document string.
     */
    
    /**
     * APIMethod: read
     * Read an XLS doc and return an object representing the result.
     *
     * Parameters:
     * data - {String | DOMElement} Data to read.
     * options - {Object} Options for the reader.
     *
     * Returns:
     * {Object} An object representing the GeocodeResponse.
     */

    CLASS_NAME: "OpenLayers.Format.XLS" 
});
/* ======================================================================
    OpenLayers/Format/XLS/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XLS.js
 * @requires OpenLayers/Format/GML/v3.js
 */

/**
 * Class: OpenLayers.Format.XLS.v1
 * Superclass for XLS version 1 parsers. Only supports GeocodeRequest for now.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.XLS.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        xls: "http://www.opengis.net/xls",
        gml: "http://www.opengis.net/gml",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
     * Changing is not recommended, a new Format should be instantiated.
     */
    xy: true,
    
    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "xls",

    /**
     * Property: schemaLocation
     * {String} Schema location for a particular minor version.
     */
    schemaLocation: null,
    
    /**
     * Constructor: OpenLayers.Format.XLS.v1
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.XLS> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * Method: read
     *
     * Parameters:
     * data - {DOMElement} An XLS document element.
     * options - {Object} Options for the reader.
     *
     * Returns:
     * {Object} An object representing the XLSResponse.
     */
    read: function(data, options) {
        options = OpenLayers.Util.applyDefaults(options, this.options);
        var xls = {};
        this.readChildNodes(data, xls);
        return xls;
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "xls": {
            "XLS": function(node, xls) {
                xls.version = node.getAttribute("version");
                this.readChildNodes(node, xls);
            },
            "Response": function(node, xls) {
               this.readChildNodes(node, xls);
            },
            "GeocodeResponse": function(node, xls) {
               xls.responseLists = [];
               this.readChildNodes(node, xls);
            },
            "GeocodeResponseList": function(node, xls) {
                var responseList = {
                    features: [], 
                    numberOfGeocodedAddresses: 
                        parseInt(node.getAttribute("numberOfGeocodedAddresses"))
                };
                xls.responseLists.push(responseList);
                this.readChildNodes(node, responseList);
            },
            "GeocodedAddress": function(node, responseList) {
                var feature = new OpenLayers.Feature.Vector();
                responseList.features.push(feature);
                this.readChildNodes(node, feature);
                // post-process geometry
                feature.geometry = feature.components[0];
            },
            "GeocodeMatchCode": function(node, feature) {
                feature.attributes.matchCode = {
                    accuracy: parseFloat(node.getAttribute("accuracy")),
                    matchType: node.getAttribute("matchType")
                };
            },
            "Address": function(node, feature) {
                var address = {
                    countryCode: node.getAttribute("countryCode"),
                    addressee: node.getAttribute("addressee"),
                    street: [],
                    place: []
                };
                feature.attributes.address = address;
                this.readChildNodes(node, address);
            },
            "freeFormAddress": function(node, address) {
                address.freeFormAddress = this.getChildValue(node);
            },
            "StreetAddress": function(node, address) {
                this.readChildNodes(node, address);
            },
            "Building": function(node, address) {
                address.building = {
                    'number': node.getAttribute("number"),
                    subdivision: node.getAttribute("subdivision"),
                    buildingName: node.getAttribute("buildingName")
                };
            },
            "Street": function(node, address) {
                // only support the built-in primitive type for now
                address.street.push(this.getChildValue(node));
            },
            "Place": function(node, address) {
                // type is one of CountrySubdivision, 
                // CountrySecondarySubdivision, Municipality or
                // MunicipalitySubdivision
                address.place[node.getAttribute("type")] = 
                    this.getChildValue(node);
            },
            "PostalCode": function(node, address) {
                address.postalCode = this.getChildValue(node);
            }
        },
        "gml": OpenLayers.Format.GML.v3.prototype.readers.gml
    },
    
    /**
     * Method: write
     *
     * Parameters:
     * request - {Object} An object representing the geocode request.
     *
     * Returns:
     * {DOMElement} The root of an XLS document.
     */
    write: function(request) {
        return this.writers.xls.XLS.apply(this, [request]);
    },
    
    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "xls": {
            "XLS": function(request) {
                var root = this.createElementNSPlus(
                    "xls:XLS",
                    {attributes: {
                        "version": this.VERSION,
                        "xsi:schemaLocation": this.schemaLocation
                    }}
                );
                this.writeNode("RequestHeader", request.header, root);
                this.writeNode("Request", request, root);
                return root;
            },
            "RequestHeader": function(header) {
                return this.createElementNSPlus("xls:RequestHeader");
            },
            "Request": function(request) {
                var node = this.createElementNSPlus("xls:Request", {
                    attributes: {
                        methodName: "GeocodeRequest",
                        requestID: request.requestID || "",
                        version: this.VERSION
                    }
                });
                this.writeNode("GeocodeRequest", request.addresses, node);
                return node;
            },
            "GeocodeRequest": function(addresses) {
                var node = this.createElementNSPlus("xls:GeocodeRequest");
                for (var i=0, len=addresses.length; i<len; i++) {
                    this.writeNode("Address", addresses[i], node);
                }
                return node;
            },
            "Address": function(address) {
                var node = this.createElementNSPlus("xls:Address", {
                    attributes: {
                        countryCode: address.countryCode
                    }
                });
                if (address.freeFormAddress) {
                    this.writeNode("freeFormAddress", address.freeFormAddress, node);
                } else {
                    if (address.street) {
                        this.writeNode("StreetAddress", address, node);
                    }
                    if (address.municipality) {
                        this.writeNode("Municipality", address.municipality, node);
                    }
                    if (address.countrySubdivision) {
                        this.writeNode("CountrySubdivision", address.countrySubdivision, node);
                    }
                    if (address.postalCode) {
                        this.writeNode("PostalCode", address.postalCode, node);
                    }
                }
                return node;
            },
            "freeFormAddress": function(freeFormAddress) {
                return this.createElementNSPlus("freeFormAddress", 
                    {value: freeFormAddress});
            },
            "StreetAddress": function(address) {
                var node = this.createElementNSPlus("xls:StreetAddress");
                if (address.building) {
                    this.writeNode(node, "Building", address.building);
                }
                var street = address.street;
                if (!(OpenLayers.Util.isArray(street))) {
                    street = [street];
                }
                for (var i=0, len=street.length; i < len; i++) {
                    this.writeNode("Street", street[i], node);
                }
                return node;
            },
            "Building": function(building) {
                return this.createElementNSPlus("xls:Building", {
                    attributes: {
                        "number": building["number"],
                        "subdivision": building.subdivision,
                        "buildingName": building.buildingName
                    }
                });
            },
            "Street": function(street) {
                return this.createElementNSPlus("xls:Street", {value: street});
            },
            "Municipality": function(municipality) {
                return this.createElementNSPlus("xls:Place", {
                    attributes: {
                        type: "Municipality"
                    },
                    value: municipality
                });
            },
            "CountrySubdivision": function(countrySubdivision) {
                return this.createElementNSPlus("xls:Place", {
                    attributes: {
                        type: "CountrySubdivision"
                    },
                    value: countrySubdivision
                });
            },
            "PostalCode": function(postalCode) {
                return this.createElementNSPlus("xls:PostalCode", {
                    value: postalCode
                });
            }
        }
    },
    
    CLASS_NAME: "OpenLayers.Format.XLS.v1" 

});
/* ======================================================================
    OpenLayers/Format/XLS/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XLS/v1.js
 */

/**
 * Class: OpenLayers.Format.XLS.v1_1_0
 * Read / write XLS version 1.1.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XLS.v1>
 */
OpenLayers.Format.XLS.v1_1_0 = OpenLayers.Class(
    OpenLayers.Format.XLS.v1, {
    
    /**
     * Constant: VERSION
     * {String} 1.1
     */
    VERSION: "1.1",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/xls
     *   http://schemas.opengis.net/ols/1.1.0/LocationUtilityService.xsd
     */
    schemaLocation: "http://www.opengis.net/xls http://schemas.opengis.net/ols/1.1.0/LocationUtilityService.xsd",

    /**
     * Constructor: OpenLayers.Format.XLS.v1_1_0
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.XLS> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    CLASS_NAME: "OpenLayers.Format.XLS.v1_1_0"

});

// Support non standard implementation
OpenLayers.Format.XLS.v1_1 = OpenLayers.Format.XLS.v1_1_0;
/* ======================================================================
    OpenLayers/Renderer/SVG.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Renderer/Elements.js
 */

/**
 * Class: OpenLayers.Renderer.SVG
 * 
 * Inherits:
 *  - <OpenLayers.Renderer.Elements>
 */
OpenLayers.Renderer.SVG = OpenLayers.Class(OpenLayers.Renderer.Elements, {

    /** 
     * Property: xmlns
     * {String}
     */
    xmlns: "http://www.w3.org/2000/svg",
    
    /**
     * Property: xlinkns
     * {String}
     */
    xlinkns: "http://www.w3.org/1999/xlink",

    /**
     * Constant: MAX_PIXEL
     * {Integer} Firefox has a limitation where values larger or smaller than  
     *           about 15000 in an SVG document lock the browser up. This 
     *           works around it.
     */
    MAX_PIXEL: 15000,

    /**
     * Property: translationParameters
     * {Object} Hash with "x" and "y" properties
     */
    translationParameters: null,
    
    /**
     * Property: symbolMetrics
     * {Object} Cache for symbol metrics according to their svg coordinate
     *     space. This is an object keyed by the symbol's id, and values are
     *     an array of [width, centerX, centerY].
     */
    symbolMetrics: null,
    
    /**
     * Constructor: OpenLayers.Renderer.SVG
     * 
     * Parameters:
     * containerID - {String}
     */
    initialize: function(containerID) {
        if (!this.supported()) { 
            return; 
        }
        OpenLayers.Renderer.Elements.prototype.initialize.apply(this, 
                                                                arguments);
        this.translationParameters = {x: 0, y: 0};
        
        this.symbolMetrics = {};
    },

    /**
     * APIMethod: supported
     * 
     * Returns:
     * {Boolean} Whether or not the browser supports the SVG renderer
     */
    supported: function() {
        var svgFeature = "http://www.w3.org/TR/SVG11/feature#";
        return (document.implementation && 
           (document.implementation.hasFeature("org.w3c.svg", "1.0") || 
            document.implementation.hasFeature(svgFeature + "SVG", "1.1") || 
            document.implementation.hasFeature(svgFeature + "BasicStructure", "1.1") ));
    },    

    /**
     * Method: inValidRange
     * See #669 for more information
     *
     * Parameters:
     * x      - {Integer}
     * y      - {Integer}
     * xyOnly - {Boolean} whether or not to just check for x and y, which means
     *     to not take the current translation parameters into account if true.
     * 
     * Returns:
     * {Boolean} Whether or not the 'x' and 'y' coordinates are in the  
     *           valid range.
     */ 
    inValidRange: function(x, y, xyOnly) {
        var left = x + (xyOnly ? 0 : this.translationParameters.x);
        var top = y + (xyOnly ? 0 : this.translationParameters.y);
        return (left >= -this.MAX_PIXEL && left <= this.MAX_PIXEL &&
                top >= -this.MAX_PIXEL && top <= this.MAX_PIXEL);
    },

    /**
     * Method: setExtent
     * 
     * Parameters:
     * extent - {<OpenLayers.Bounds>}
     * resolutionChanged - {Boolean}
     * 
     * Returns:
     * {Boolean} true to notify the layer that the new extent does not exceed
     *     the coordinate range, and the features will not need to be redrawn.
     *     False otherwise.
     */
    setExtent: function(extent, resolutionChanged) {
        var coordSysUnchanged = OpenLayers.Renderer.Elements.prototype.setExtent.apply(this, arguments);
        
        var resolution = this.getResolution(),
            left = -extent.left / resolution,
            top = extent.top / resolution;

        // If the resolution has changed, start over changing the corner, because
        // the features will redraw.
        if (resolutionChanged) {
            this.left = left;
            this.top = top;
            // Set the viewbox
            var extentString = "0 0 " + this.size.w + " " + this.size.h;

            this.rendererRoot.setAttributeNS(null, "viewBox", extentString);
            this.translate(this.xOffset, 0);
            return true;
        } else {
            var inRange = this.translate(left - this.left + this.xOffset, top - this.top);
            if (!inRange) {
                // recenter the coordinate system
                this.setExtent(extent, true);
            }
            return coordSysUnchanged && inRange;
        }
    },
    
    /**
     * Method: translate
     * Transforms the SVG coordinate system
     * 
     * Parameters:
     * x - {Float}
     * y - {Float}
     * 
     * Returns:
     * {Boolean} true if the translation parameters are in the valid coordinates
     *     range, false otherwise.
     */
    translate: function(x, y) {
        if (!this.inValidRange(x, y, true)) {
            return false;
        } else {
            var transformString = "";
            if (x || y) {
                transformString = "translate(" + x + "," + y + ")";
            }
            this.root.setAttributeNS(null, "transform", transformString);
            this.translationParameters = {x: x, y: y};
            return true;
        }
    },

    /**
     * Method: setSize
     * Sets the size of the drawing surface.
     * 
     * Parameters:
     * size - {<OpenLayers.Size>} The size of the drawing surface
     */
    setSize: function(size) {
        OpenLayers.Renderer.prototype.setSize.apply(this, arguments);
        
        this.rendererRoot.setAttributeNS(null, "width", this.size.w);
        this.rendererRoot.setAttributeNS(null, "height", this.size.h);
    },

    /** 
     * Method: getNodeType 
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     * 
     * Returns:
     * {String} The corresponding node type for the specified geometry
     */
    getNodeType: function(geometry, style) {
        var nodeType = null;
        switch (geometry.CLASS_NAME) {
            case "OpenLayers.Geometry.Point":
                if (style.externalGraphic) {
                    nodeType = "image";
                } else if (this.isComplexSymbol(style.graphicName)) {
                    nodeType = "svg";
                } else {
                    nodeType = "circle";
                }
                break;
            case "OpenLayers.Geometry.Rectangle":
                nodeType = "rect";
                break;
            case "OpenLayers.Geometry.LineString":
                nodeType = "polyline";
                break;
            case "OpenLayers.Geometry.LinearRing":
                nodeType = "polygon";
                break;
            case "OpenLayers.Geometry.Polygon":
            case "OpenLayers.Geometry.Curve":
                nodeType = "path";
                break;
            default:
                break;
        }
        return nodeType;
    },

    /** 
     * Method: setStyle
     * Use to set all the style attributes to a SVG node.
     * 
     * Takes care to adjust stroke width and point radius to be
     * resolution-relative
     *
     * Parameters:
     * node - {SVGDomElement} An SVG element to decorate
     * style - {Object}
     * options - {Object} Currently supported options include 
     *                              'isFilled' {Boolean} and
     *                              'isStroked' {Boolean}
     */
    setStyle: function(node, style, options) {
        style = style  || node._style;
        options = options || node._options;
        var r = parseFloat(node.getAttributeNS(null, "r"));
        var widthFactor = 1;
        var pos;
        if (node._geometryClass == "OpenLayers.Geometry.Point" && r) {
            node.style.visibility = "";
            if (style.graphic === false) {
                node.style.visibility = "hidden";
            } else if (style.externalGraphic) {
                pos = this.getPosition(node);
                
                if (style.graphicTitle) {
                    node.setAttributeNS(null, "title", style.graphicTitle);
                    //Standards-conformant SVG
                    // Prevent duplicate nodes. See issue https://github.com/openlayers/openlayers/issues/92 
                    var titleNode = node.getElementsByTagName("title");
                    if (titleNode.length > 0) {
                        titleNode[0].firstChild.textContent = style.graphicTitle;
                    } else {
                        var label = this.nodeFactory(null, "title");
                        label.textContent = style.graphicTitle;
                        node.appendChild(label);
                    }
                }
                if (style.graphicWidth && style.graphicHeight) {
                  node.setAttributeNS(null, "preserveAspectRatio", "none");
                }
                var width = style.graphicWidth || style.graphicHeight;
                var height = style.graphicHeight || style.graphicWidth;
                width = width ? width : style.pointRadius*2;
                height = height ? height : style.pointRadius*2;
                var xOffset = (style.graphicXOffset != undefined) ?
                    style.graphicXOffset : -(0.5 * width);
                var yOffset = (style.graphicYOffset != undefined) ?
                    style.graphicYOffset : -(0.5 * height);

                var opacity = style.graphicOpacity || style.fillOpacity;
                
                node.setAttributeNS(null, "x", (pos.x + xOffset).toFixed());
                node.setAttributeNS(null, "y", (pos.y + yOffset).toFixed());
                node.setAttributeNS(null, "width", width);
                node.setAttributeNS(null, "height", height);
                node.setAttributeNS(this.xlinkns, "href", style.externalGraphic);
                node.setAttributeNS(null, "style", "opacity: "+opacity);
                node.onclick = OpenLayers.Renderer.SVG.preventDefault;
            } else if (this.isComplexSymbol(style.graphicName)) {
                // the symbol viewBox is three times as large as the symbol
                var offset = style.pointRadius * 3;
                var size = offset * 2;
                var src = this.importSymbol(style.graphicName);
                pos = this.getPosition(node);
                widthFactor = this.symbolMetrics[src.id][0] * 3 / size;
                
                // remove the node from the dom before we modify it. This
                // prevents various rendering issues in Safari and FF
                var parent = node.parentNode;
                var nextSibling = node.nextSibling;
                if(parent) {
                    parent.removeChild(node);
                }
                
                // The more appropriate way to implement this would be use/defs,
                // but due to various issues in several browsers, it is safer to
                // copy the symbols instead of referencing them. 
                // See e.g. ticket http://trac.osgeo.org/openlayers/ticket/2985 
                // and this email thread
                // http://osgeo-org.1803224.n2.nabble.com/Select-Control-Ctrl-click-on-Feature-with-a-graphicName-opens-new-browser-window-tc5846039.html
                node.firstChild && node.removeChild(node.firstChild);
                node.appendChild(src.firstChild.cloneNode(true));
                node.setAttributeNS(null, "viewBox", src.getAttributeNS(null, "viewBox"));
                
                node.setAttributeNS(null, "width", size);
                node.setAttributeNS(null, "height", size);
                node.setAttributeNS(null, "x", pos.x - offset);
                node.setAttributeNS(null, "y", pos.y - offset);
                
                // now that the node has all its new properties, insert it
                // back into the dom where it was
                if(nextSibling) {
                    parent.insertBefore(node, nextSibling);
                } else if(parent) {
                    parent.appendChild(node);
                }
            } else {
                node.setAttributeNS(null, "r", style.pointRadius);
            }

            var rotation = style.rotation;
            
            if ((rotation !== undefined || node._rotation !== undefined) && pos) {
                node._rotation = rotation;
                rotation |= 0;
                if (node.nodeName !== "svg") { 
                    node.setAttributeNS(null, "transform", 
                        "rotate(" + rotation + " " + pos.x + " " + 
                        pos.y + ")"); 
                } else {
                    var metrics = this.symbolMetrics[src.id];
                    node.firstChild.setAttributeNS(null, "transform", "rotate(" 
                        + rotation + " " 
                        + metrics[1] + " "
                        + metrics[2] + ")");
                }
            }
        }
        
        if (options.isFilled) {
            node.setAttributeNS(null, "fill", style.fillColor);
            node.setAttributeNS(null, "fill-opacity", style.fillOpacity);
        } else {
            node.setAttributeNS(null, "fill", "none");
        }

        if (options.isStroked) {
            node.setAttributeNS(null, "stroke", style.strokeColor);
            node.setAttributeNS(null, "stroke-opacity", style.strokeOpacity);
            node.setAttributeNS(null, "stroke-width", style.strokeWidth * widthFactor);
            node.setAttributeNS(null, "stroke-linecap", style.strokeLinecap || "round");
            // Hard-coded linejoin for now, to make it look the same as in VML.
            // There is no strokeLinejoin property yet for symbolizers.
            node.setAttributeNS(null, "stroke-linejoin", "round");
            style.strokeDashstyle && node.setAttributeNS(null,
                "stroke-dasharray", this.dashStyle(style, widthFactor));
        } else {
            node.setAttributeNS(null, "stroke", "none");
        }
        
        if (style.pointerEvents) {
            node.setAttributeNS(null, "pointer-events", style.pointerEvents);
        }
                
        if (style.cursor != null) {
            node.setAttributeNS(null, "cursor", style.cursor);
        }
        
        return node;
    },

    /** 
     * Method: dashStyle
     * 
     * Parameters:
     * style - {Object}
     * widthFactor - {Number}
     * 
     * Returns:
     * {String} A SVG compliant 'stroke-dasharray' value
     */
    dashStyle: function(style, widthFactor) {
        var w = style.strokeWidth * widthFactor;
        var str = style.strokeDashstyle;
        switch (str) {
            case 'solid':
                return 'none';
            case 'dot':
                return [1, 4 * w].join();
            case 'dash':
                return [4 * w, 4 * w].join();
            case 'dashdot':
                return [4 * w, 4 * w, 1, 4 * w].join();
            case 'longdash':
                return [8 * w, 4 * w].join();
            case 'longdashdot':
                return [8 * w, 4 * w, 1, 4 * w].join();
            default:
                return OpenLayers.String.trim(str).replace(/\s+/g, ",");
        }
    },
    
    /** 
     * Method: createNode
     * 
     * Parameters:
     * type - {String} Kind of node to draw
     * id - {String} Id for node
     * 
     * Returns:
     * {DOMElement} A new node of the given type and id
     */
    createNode: function(type, id) {
        var node = document.createElementNS(this.xmlns, type);
        if (id) {
            node.setAttributeNS(null, "id", id);
        }
        return node;    
    },
    
    /** 
     * Method: nodeTypeCompare
     * 
     * Parameters:
     * node - {SVGDomElement} An SVG element
     * type - {String} Kind of node
     * 
     * Returns:
     * {Boolean} Whether or not the specified node is of the specified type
     */
    nodeTypeCompare: function(node, type) {
        return (type == node.nodeName);
    },
   
    /**
     * Method: createRenderRoot
     * 
     * Returns:
     * {DOMElement} The specific render engine's root element
     */
    createRenderRoot: function() {
        var svg = this.nodeFactory(this.container.id + "_svgRoot", "svg");
        svg.style.display = "block";
        return svg;
    },

    /**
     * Method: createRoot
     * 
     * Parameters:
     * suffix - {String} suffix to append to the id
     * 
     * Returns:
     * {DOMElement}
     */
    createRoot: function(suffix) {
        return this.nodeFactory(this.container.id + suffix, "g");
    },

    /**
     * Method: createDefs
     *
     * Returns:
     * {DOMElement} The element to which we'll add the symbol definitions
     */
    createDefs: function() {
        var defs = this.nodeFactory(this.container.id + "_defs", "defs");
        this.rendererRoot.appendChild(defs);
        return defs;
    },

    /**************************************
     *                                    *
     *     GEOMETRY DRAWING FUNCTIONS     *
     *                                    *
     **************************************/

    /**
     * Method: drawPoint
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or false if the renderer could not draw the point
     */ 
    drawPoint: function(node, geometry) {
        return this.drawCircle(node, geometry, 1);
    },

    /**
     * Method: drawCircle
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * radius - {Float}
     * 
     * Returns:
     * {DOMElement} or false if the renderer could not draw the circle
     */
    drawCircle: function(node, geometry, radius) {
        var resolution = this.getResolution();
        var x = ((geometry.x - this.featureDx) / resolution + this.left);
        var y = (this.top - geometry.y / resolution);

        if (this.inValidRange(x, y)) { 
            node.setAttributeNS(null, "cx", x);
            node.setAttributeNS(null, "cy", y);
            node.setAttributeNS(null, "r", radius);
            return node;
        } else {
            return false;
        }    
            
    },
    
    /**
     * Method: drawLineString
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or null if the renderer could not draw all components of
     *     the linestring, or false if nothing could be drawn
     */ 
    drawLineString: function(node, geometry) {
        var componentsResult = this.getComponentsString(geometry.components);
        if (componentsResult.path) {
            node.setAttributeNS(null, "points", componentsResult.path);
            return (componentsResult.complete ? node : null);  
        } else {
            return false;
        }
    },
    
    /**
     * Method: drawLinearRing
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or null if the renderer could not draw all components
     *     of the linear ring, or false if nothing could be drawn
     */ 
    drawLinearRing: function(node, geometry) {
        var componentsResult = this.getComponentsString(geometry.components);
        if (componentsResult.path) {
            node.setAttributeNS(null, "points", componentsResult.path);
            return (componentsResult.complete ? node : null);  
        } else {
            return false;
        }
    },
    
    /**
     * Method: drawPolygon
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or null if the renderer could not draw all components
     *     of the polygon, or false if nothing could be drawn
     */ 
    drawPolygon: function(node, geometry) {
        var d = "";
        var draw = true;
        var complete = true;
        var linearRingResult, path;
        for (var j=0, len=geometry.components.length; j<len; j++) {
            d += " M";
            linearRingResult = this.getComponentsString(
                geometry.components[j].components, " ");
            path = linearRingResult.path;
            if (path) {
                d += " " + path;
                complete = linearRingResult.complete && complete;
            } else {
                draw = false;
            }
        }
        d += " z";
        if (draw) {
            node.setAttributeNS(null, "d", d);
            node.setAttributeNS(null, "fill-rule", "evenodd");
            return complete ? node : null;
        } else {
            return false;
        }    
    },
    
    /**
     * Method: drawRectangle
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or false if the renderer could not draw the rectangle
     */ 
    drawRectangle: function(node, geometry) {
        var resolution = this.getResolution();
        var x = ((geometry.x - this.featureDx) / resolution + this.left);
        var y = (this.top - geometry.y / resolution);

        if (this.inValidRange(x, y)) { 
            node.setAttributeNS(null, "x", x);
            node.setAttributeNS(null, "y", y);
            node.setAttributeNS(null, "width", geometry.width / resolution);
            node.setAttributeNS(null, "height", geometry.height / resolution);
            return node;
        } else {
            return false;
        }
    },
    
    /**
     * Method: drawText
     * This method is only called by the renderer itself.
     *
     * Parameters:
     * featureId - {String}
     * style -
     * location - {<OpenLayers.Geometry.Point>}
     */
    drawText: function(featureId, style, location) {
        var drawOutline = (!!style.labelOutlineWidth);
        // First draw text in halo color and size and overlay the
        // normal text afterwards
        if (drawOutline) {
            var outlineStyle = OpenLayers.Util.extend({}, style);
            outlineStyle.fontColor = outlineStyle.labelOutlineColor;
            outlineStyle.fontStrokeColor = outlineStyle.labelOutlineColor;
            outlineStyle.fontStrokeWidth = style.labelOutlineWidth;
            delete outlineStyle.labelOutlineWidth;
            this.drawText(featureId, outlineStyle, location);
        }

        var resolution = this.getResolution();

        var x = ((location.x - this.featureDx) / resolution + this.left);
        var y = (location.y / resolution - this.top);

        var suffix = (drawOutline)?this.LABEL_OUTLINE_SUFFIX:this.LABEL_ID_SUFFIX;
        var label = this.nodeFactory(featureId + suffix, "text");

        label.setAttributeNS(null, "x", x);
        label.setAttributeNS(null, "y", -y);

        if (style.fontColor) {
            label.setAttributeNS(null, "fill", style.fontColor);
        }
        if (style.fontStrokeColor) {
            label.setAttributeNS(null, "stroke", style.fontStrokeColor);
        }
        if (style.fontStrokeWidth) {
            label.setAttributeNS(null, "stroke-width", style.fontStrokeWidth);
        }
        if (style.fontOpacity) {
            label.setAttributeNS(null, "opacity", style.fontOpacity);
        }
        if (style.fontFamily) {
            label.setAttributeNS(null, "font-family", style.fontFamily);
        }
        if (style.fontSize) {
            label.setAttributeNS(null, "font-size", style.fontSize);
        }
        if (style.fontWeight) {
            label.setAttributeNS(null, "font-weight", style.fontWeight);
        }
        if (style.fontStyle) {
            label.setAttributeNS(null, "font-style", style.fontStyle);
        }
        if (style.labelSelect === true) {
            label.setAttributeNS(null, "pointer-events", "visible");
            label._featureId = featureId;
        } else {
            label.setAttributeNS(null, "pointer-events", "none");
        }
        var align = style.labelAlign || OpenLayers.Renderer.defaultSymbolizer.labelAlign;
        label.setAttributeNS(null, "text-anchor",
            OpenLayers.Renderer.SVG.LABEL_ALIGN[align[0]] || "middle");

        if (OpenLayers.IS_GECKO === true) {
            label.setAttributeNS(null, "dominant-baseline",
                OpenLayers.Renderer.SVG.LABEL_ALIGN[align[1]] || "central");
        }

        var labelRows = style.label.split('\n');
        var numRows = labelRows.length;
        while (label.childNodes.length > numRows) {
            label.removeChild(label.lastChild);
        }
        for (var i = 0; i < numRows; i++) {
            var tspan = this.nodeFactory(featureId + suffix + "_tspan_" + i, "tspan");
            if (style.labelSelect === true) {
                tspan._featureId = featureId;
                tspan._geometry = location;
                tspan._geometryClass = location.CLASS_NAME;
            }
            if (OpenLayers.IS_GECKO === false) {
                tspan.setAttributeNS(null, "baseline-shift",
                    OpenLayers.Renderer.SVG.LABEL_VSHIFT[align[1]] || "-35%");
            }
            tspan.setAttribute("x", x);
            if (i == 0) {
                var vfactor = OpenLayers.Renderer.SVG.LABEL_VFACTOR[align[1]];
                if (vfactor == null) {
                     vfactor = -.5;
                }
                tspan.setAttribute("dy", (vfactor*(numRows-1)) + "em");
            } else {
                tspan.setAttribute("dy", "1em");
            }
            tspan.textContent = (labelRows[i] === '') ? ' ' : labelRows[i];
            if (!tspan.parentNode) {
                label.appendChild(tspan);
            }
        }

        if (!label.parentNode) {
            this.textRoot.appendChild(label);
        }
    },
    
    /** 
     * Method: getComponentString
     * 
     * Parameters:
     * components - {Array(<OpenLayers.Geometry.Point>)} Array of points
     * separator - {String} character between coordinate pairs. Defaults to ","
     * 
     * Returns:
     * {Object} hash with properties "path" (the string created from the
     *     components and "complete" (false if the renderer was unable to
     *     draw all components)
     */
    getComponentsString: function(components, separator) {
        var renderCmp = [];
        var complete = true;
        var len = components.length;
        var strings = [];
        var str, component;
        for(var i=0; i<len; i++) {
            component = components[i];
            renderCmp.push(component);
            str = this.getShortString(component);
            if (str) {
                strings.push(str);
            } else {
                // The current component is outside the valid range. Let's
                // see if the previous or next component is inside the range.
                // If so, add the coordinate of the intersection with the
                // valid range bounds.
                if (i > 0) {
                    if (this.getShortString(components[i - 1])) {
                        strings.push(this.clipLine(components[i],
                            components[i-1]));
                    }
                }
                if (i < len - 1) {
                    if (this.getShortString(components[i + 1])) {
                        strings.push(this.clipLine(components[i],
                            components[i+1]));
                    }
                }
                complete = false;
            }
        }

        return {
            path: strings.join(separator || ","),
            complete: complete
        };
    },
    
    /**
     * Method: clipLine
     * Given two points (one inside the valid range, and one outside),
     * clips the line betweeen the two points so that the new points are both
     * inside the valid range.
     * 
     * Parameters:
     * badComponent - {<OpenLayers.Geometry.Point>} original geometry of the
     *     invalid point
     * goodComponent - {<OpenLayers.Geometry.Point>} original geometry of the
     *     valid point
     * Returns
     * {String} the SVG coordinate pair of the clipped point (like
     *     getShortString), or an empty string if both passed componets are at
     *     the same point.
     */
    clipLine: function(badComponent, goodComponent) {
        if (goodComponent.equals(badComponent)) {
            return "";
        }
        var resolution = this.getResolution();
        var maxX = this.MAX_PIXEL - this.translationParameters.x;
        var maxY = this.MAX_PIXEL - this.translationParameters.y;
        var x1 = (goodComponent.x - this.featureDx) / resolution + this.left;
        var y1 = this.top - goodComponent.y / resolution;
        var x2 = (badComponent.x - this.featureDx) / resolution + this.left;
        var y2 = this.top - badComponent.y / resolution;
        var k;
        if (x2 < -maxX || x2 > maxX) {
            k = (y2 - y1) / (x2 - x1);
            x2 = x2 < 0 ? -maxX : maxX;
            y2 = y1 + (x2 - x1) * k;
        }
        if (y2 < -maxY || y2 > maxY) {
            k = (x2 - x1) / (y2 - y1);
            y2 = y2 < 0 ? -maxY : maxY;
            x2 = x1 + (y2 - y1) * k;
        }
        return x2 + "," + y2;
    },

    /** 
     * Method: getShortString
     * 
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     * 
     * Returns:
     * {String} or false if point is outside the valid range
     */
    getShortString: function(point) {
        var resolution = this.getResolution();
        var x = ((point.x - this.featureDx) / resolution + this.left);
        var y = (this.top - point.y / resolution);

        if (this.inValidRange(x, y)) { 
            return x + "," + y;
        } else {
            return false;
        }
    },
    
    /**
     * Method: getPosition
     * Finds the position of an svg node.
     * 
     * Parameters:
     * node - {DOMElement}
     * 
     * Returns:
     * {Object} hash with x and y properties, representing the coordinates
     *     within the svg coordinate system
     */
    getPosition: function(node) {
        return({
            x: parseFloat(node.getAttributeNS(null, "cx")),
            y: parseFloat(node.getAttributeNS(null, "cy"))
        });
    },

    /**
     * Method: importSymbol
     * add a new symbol definition from the rendererer's symbol hash
     * 
     * Parameters:
     * graphicName - {String} name of the symbol to import
     * 
     * Returns:
     * {DOMElement} - the imported symbol
     */      
    importSymbol: function (graphicName)  {
        if (!this.defs) {
            // create svg defs tag
            this.defs = this.createDefs();
        }
        var id = this.container.id + "-" + graphicName;
        
        // check if symbol already exists in the defs
        var existing = document.getElementById(id);
        if (existing != null) {
            return existing;
        }
        
        var symbol = OpenLayers.Renderer.symbol[graphicName];
        if (!symbol) {
            throw new Error(graphicName + ' is not a valid symbol name');
        }

        var symbolNode = this.nodeFactory(id, "symbol");
        var node = this.nodeFactory(null, "polygon");
        symbolNode.appendChild(node);
        var symbolExtent = new OpenLayers.Bounds(
                                    Number.MAX_VALUE, Number.MAX_VALUE, 0, 0);

        var points = [];
        var x,y;
        for (var i=0; i<symbol.length; i=i+2) {
            x = symbol[i];
            y = symbol[i+1];
            symbolExtent.left = Math.min(symbolExtent.left, x);
            symbolExtent.bottom = Math.min(symbolExtent.bottom, y);
            symbolExtent.right = Math.max(symbolExtent.right, x);
            symbolExtent.top = Math.max(symbolExtent.top, y);
            points.push(x, ",", y);
        }
        
        node.setAttributeNS(null, "points", points.join(" "));
        
        var width = symbolExtent.getWidth();
        var height = symbolExtent.getHeight();
        // create a viewBox three times as large as the symbol itself,
        // to allow for strokeWidth being displayed correctly at the corners.
        var viewBox = [symbolExtent.left - width,
                        symbolExtent.bottom - height, width * 3, height * 3];
        symbolNode.setAttributeNS(null, "viewBox", viewBox.join(" "));
        this.symbolMetrics[id] = [
            Math.max(width, height),
            symbolExtent.getCenterLonLat().lon,
            symbolExtent.getCenterLonLat().lat
        ];
        
        this.defs.appendChild(symbolNode);
        return symbolNode;
    },
    
    /**
     * Method: getFeatureIdFromEvent
     * 
     * Parameters:
     * evt - {Object} An <OpenLayers.Event> object
     *
     * Returns:
     * {String} A feature id or undefined.
     */
    getFeatureIdFromEvent: function(evt) {
        var featureId = OpenLayers.Renderer.Elements.prototype.getFeatureIdFromEvent.apply(this, arguments);
        if(!featureId) {
            var target = evt.target;
            featureId = target.parentNode && target != this.rendererRoot ?
                target.parentNode._featureId : undefined;
        }
        return featureId;
    },

    CLASS_NAME: "OpenLayers.Renderer.SVG"
});

/**
 * Constant: OpenLayers.Renderer.SVG.LABEL_ALIGN
 * {Object}
 */
OpenLayers.Renderer.SVG.LABEL_ALIGN = {
    "l": "start",
    "r": "end",
    "b": "bottom",
    "t": "hanging"
};

/**
 * Constant: OpenLayers.Renderer.SVG.LABEL_VSHIFT
 * {Object}
 */
OpenLayers.Renderer.SVG.LABEL_VSHIFT = {
    // according to
    // http://www.w3.org/Graphics/SVG/Test/20061213/htmlObjectHarness/full-text-align-02-b.html
    // a baseline-shift of -70% shifts the text exactly from the
    // bottom to the top of the baseline, so -35% moves the text to
    // the center of the baseline.
    "t": "-70%",
    "b": "0"    
};

/**
 * Constant: OpenLayers.Renderer.SVG.LABEL_VFACTOR
 * {Object}
 */
OpenLayers.Renderer.SVG.LABEL_VFACTOR = {
    "t": 0,
    "b": -1
};

/**
 * Function: OpenLayers.Renderer.SVG.preventDefault
 * Used to prevent default events (especially opening images in a new tab on
 * ctrl-click) from being executed for externalGraphic symbols
 */
OpenLayers.Renderer.SVG.preventDefault = function(e) {
    e.preventDefault && e.preventDefault();
};
/* ======================================================================
    OpenLayers/Format/SLD/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/SLD/v1.js
 * @requires OpenLayers/Format/Filter/v1_0_0.js
 */

/**
 * Class: OpenLayers.Format.SLD.v1_0_0
 * Write SLD version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.SLD.v1>
 */
OpenLayers.Format.SLD.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.SLD.v1, {
    
    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/sld
     *   http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd
     */
    schemaLocation: "http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd",

    /**
     * Constructor: OpenLayers.Format.SLD.v1_0_0
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.SLD> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    CLASS_NAME: "OpenLayers.Format.SLD.v1_0_0" 

});
/* ======================================================================
    OpenLayers/Format/OWSContext.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/Context.js
 */

/**
 * Class: OpenLayers.Format.OWSContext
 * Read and write OWS Context documents. OWS Context documents are a 
 * preliminary OGC (Open Geospatial Consortium) standard for storing the 
 * state of a web mapping application. In a way it is the successor to
 * Web Map Context (WMC), since it is more generic and more types of layers
 * can be stored. Also, nesting of layers is supported since version 0.3.1.
 * For more information see: http://www.ogcnetwork.net/context
 *
 * Inherits from:
 *  - <OpenLayers.Format.Context>
 */
OpenLayers.Format.OWSContext = OpenLayers.Class(OpenLayers.Format.Context,{
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "0.3.1".
     */
    defaultVersion: "0.3.1",

    /**
     * Constructor: OpenLayers.Format.OWSContext
     * Create a new parser for OWS Context documents.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * Method: getVersion
     * Returns the version to use. Subclasses can override this function
     * if a different version detection is needed.
     *
     * Parameters:
     * root - {DOMElement}
     * options - {Object} Optional configuration object.
     *
     * Returns:
     * {String} The version to use.
     */
    getVersion: function(root, options) {
        var version = OpenLayers.Format.XML.VersionedOGC.prototype.getVersion.apply(
            this, arguments);
        // 0.3.1 is backwards compatible with 0.3.0
        if (version === "0.3.0") {
            version = this.defaultVersion;
        }
        return version;
    },

    /**
     * Method: toContext
     * Create a context object free from layer given a map or a
     * context object.
     *
     * Parameters:
     * obj - {<OpenLayers.Map> | Object} The map or context.
     *
     * Returns:
     * {Object} A context object.
     */
    toContext: function(obj) {
        var context = {};
        if(obj.CLASS_NAME == "OpenLayers.Map") {
            context.bounds = obj.getExtent();
            context.maxExtent = obj.maxExtent;
            context.projection = obj.projection;
            context.size = obj.getSize();
            context.layers = obj.layers;
        }
        return context;
    },

    CLASS_NAME: "OpenLayers.Format.OWSContext" 

});
/* ======================================================================
    OpenLayers/Format/OWSContext/v0_3_1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/KML.js
 * @requires OpenLayers/Format/GML.js
 * @requires OpenLayers/Format/GML/v2.js
 * @requires OpenLayers/Format/SLD/v1_0_0.js
 * @requires OpenLayers/Format/OWSContext.js
 * @requires OpenLayers/Format/OWSCommon/v1_0_0.js
 */

/**
 * Class: OpenLayers.Format.OWSContext.v0_3_1
 * Read and write OWSContext version 0.3.1.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.OWSContext.v0_3_1 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        owc: "http://www.opengis.net/ows-context",
        gml: "http://www.opengis.net/gml",
        kml: "http://www.opengis.net/kml/2.2",
        ogc: "http://www.opengis.net/ogc",
        ows: "http://www.opengis.net/ows",
        sld: "http://www.opengis.net/sld",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Constant: VERSION
     * {String} 0.3.1
     */
    VERSION: "0.3.1", 

    /**
     * Property: schemaLocation
     * {String} Schema location
     */
    schemaLocation: "http://www.opengis.net/ows-context http://www.ogcnetwork.net/schemas/owc/0.3.1/owsContext.xsd",

    /**
     * Property: defaultPrefix
     * {String} Default namespace prefix to use.
     */
    defaultPrefix: "owc",

    /**
     * APIProperty: extractAttributes
     * {Boolean} Extract attributes from GML.  Default is true.
     */
    extractAttributes: true,
    
    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x)
     * Changing is not recommended, a new Format should be instantiated.
     */ 
    xy: true, 

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Property: featureNS
     * {String} The namespace uri to use for writing InlineGeometry
     */
    featureNS: "http://mapserver.gis.umn.edu/mapserver",

    /**
     * Property: featureType
     * {String} The name to use as the feature type when writing out
     *     InlineGeometry
     */
    featureType: 'vector',
              
    /**
     * Property: geometryName
     * {String} The name to use for the geometry attribute when writing out
     *     InlineGeometry
     */
    geometryName: 'geometry',

    /**
     * Property: nestingLayerLookup
     * {Object} Hashtable lookup for nesting layer nodes. Used while writing 
     *     the OWS context document. It is necessary to keep track of the 
     *     nestingPaths for which nesting layer nodes have already been 
     *     created, so (nesting) layer nodes are added to those nodes.
     *
     * For example:
     *
     *     If there are three layers with nestingPaths:
     *         layer1.metadata.nestingPath = "a/b/"
     *         layer2.metadata.nestingPath = "a/b/"
     *         layer2.metadata.nestingPath = "a/c"
     *
     *     then a nesting layer node "a" should be created once and added 
     *     to the resource list, a nesting layer node "b" should be created 
     *     once and added under "a", and a nesting layer node "c" should be 
     *     created and added under "a". The lookup paths for these nodes 
     *     will be "a", "a/b", and "a/c" respectively.
     */
    nestingLayerLookup: null,

    /**
     * Constructor: OpenLayers.Format.OWSContext.v0_3_1
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.OWSContext> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
        OpenLayers.Format.GML.v2.prototype.setGeometryTypes.call(this);
    },

    /**
     * Method: setNestingPath
     * Set the nestingPath property of the layer depending on the position
     *     of the layer in hierarchy of layers.
     *
     * Parameters:
     * l - {Object} An object that may have a layersContext array property.
     * 
     */
    setNestingPath : function(l){
        if(l.layersContext){
            for (var i = 0, len = l.layersContext.length; i < len; i++) {
                var layerContext = l.layersContext[i];
                var nPath = [];
                var nTitle = l.title || "";
                if(l.metadata && l.metadata.nestingPath){
                    nPath = l.metadata.nestingPath.slice();
                }
                if (nTitle != "") {
                    nPath.push(nTitle);
                }
                layerContext.metadata.nestingPath = nPath;
                if(layerContext.layersContext){
                    this.setNestingPath(layerContext);
                }
            }
        }
    },

    /**
     * Function: decomposeNestingPath
     * Takes a nestingPath like "a/b/c" and decomposes it into subpaths:
     * "a", "a/b", "a/b/c"
     *
     * Parameters:
     * nPath  - {Array} the nesting path
     *
     * Returns:
     * Array({String}) Array with subpaths, or empty array if there is nothing
     *     to decompose
     */
    decomposeNestingPath: function(nPath){
        var a = [];
        if (OpenLayers.Util.isArray(nPath)) {
            var path = nPath.slice();
            while (path.length > 0) {
                a.push(path.slice());
                path.pop();
            }
            a.reverse();
        }
        return a;
    },

    /**
     * APIMethod: read
     * Read OWS context data from a string or DOMElement, and return a list 
     *     of layers. 
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} The context object with a flat layer list as a property named
     *     layersContext.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var context = {};
        this.readNode(data, context);
        // since an OWSContext can be nested we need to go through this
        // structure recursively      
        this.setNestingPath({layersContext : context.layersContext});
        // after nesting path has been set, create a flat list of layers
        var layers = [];
        this.processLayer(layers, context);
        delete context.layersContext;
        context.layersContext = layers;
        return context;
    },

    /**
     * Method: processLayer
     * Recursive function to get back a flat list of layers from the hierarchic
     *     layer structure.
     *
     * Parameters:
     * layerArray - {Array({Object})} Array of layerContext objects
     * layer - {Object} layerContext object
     */
    processLayer: function(layerArray, layer) {
        if (layer.layersContext) {
            for (var i=0, len = layer.layersContext.length; i<len; i++) {
                var l = layer.layersContext[i];
                layerArray.push(l);
                if (l.layersContext) {
                    this.processLayer(layerArray, l);
                }
            }
        }
    },

    /**
     * APIMethod: write
     *
     * Parameters:
     * context - {Object} An object representing the map context.
     * options - {Object} Optional object.
     *
     * Returns:
     * {String} An OWS Context document string.
     */
    write: function(context, options) {
        var name = "OWSContext";
        this.nestingLayerLookup = {}; //start with empty lookup
        options = options || {};
        OpenLayers.Util.applyDefaults(options, context);
        var root = this.writeNode(name, options);
        this.nestingLayerLookup = null; //clear lookup
        this.setAttributeNS(
            root, this.namespaces["xsi"],
            "xsi:schemaLocation", this.schemaLocation
        );
        return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
    }, 

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "kml": {
            "Document": function(node, obj) {
                obj.features = new OpenLayers.Format.KML(
                    {kmlns: this.namespaces.kml, 
                        extractStyles: true}).read(node);
            }
        },
        "owc": { 
            "OWSContext": function(node, obj) {
                this.readChildNodes(node, obj);
            }, 
            "General": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "ResourceList": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Layer": function(node, obj) {
                var layerContext = {
                    metadata: {},
                    visibility: (node.getAttribute("hidden") != "1"),
                    queryable: (node.getAttribute("queryable") == "1"),
                    opacity: ((node.getAttribute("opacity") != null) ? 
                        parseFloat(node.getAttribute("opacity")) : null),
                    name: node.getAttribute("name"),
                    /* A category layer is a dummy layer meant for creating
                       hierarchies. It is not a physical layer in the 
                       OpenLayers sense. The assumption we make here is that
                       category layers do not have a name attribute */
                    categoryLayer: (node.getAttribute("name") == null),
                    formats: [],
                    styles: []
                };
                if (!obj.layersContext) {
                    obj.layersContext = [];
                }
                obj.layersContext.push(layerContext);
                this.readChildNodes(node, layerContext);
            },
            "InlineGeometry": function(node, obj) {
                obj.features = [];
                var elements = this.getElementsByTagNameNS(node, 
                    this.namespaces.gml, "featureMember");
                var el;
                if (elements.length >= 1) {
                    el = elements[0];
                }
                if (el && el.firstChild) {
                    var featurenode = (el.firstChild.nextSibling) ? 
                        el.firstChild.nextSibling : el.firstChild;
                    this.setNamespace("feature", featurenode.namespaceURI);
                    this.featureType = featurenode.localName || 
                        featurenode.nodeName.split(":").pop();
                    this.readChildNodes(node, obj);
                }
            },
            "Server": function(node, obj) {
                // when having multiple Server types, we prefer WMS
                if ((!obj.service && !obj.version) || 
                    (obj.service != 
                        OpenLayers.Format.Context.serviceTypes.WMS)) {
                            obj.service = node.getAttribute("service");
                            obj.version = node.getAttribute("version");
                            this.readChildNodes(node, obj);
                }
            },
            "Name": function(node, obj) {
                obj.name = this.getChildValue(node);
                this.readChildNodes(node, obj);
            },
            "Title": function(node, obj) {
                obj.title = this.getChildValue(node);
                this.readChildNodes(node, obj);
            },
            "StyleList": function(node, obj) {
                this.readChildNodes(node, obj.styles);
            },
            "Style": function(node, obj) {
                var style = {};
                obj.push(style);
                this.readChildNodes(node, style);
            },
            "LegendURL": function(node, obj) {
                var legend = {};
                obj.legend = legend;
                this.readChildNodes(node, legend);
            },
            "OnlineResource": function(node, obj) {
                obj.url = this.getAttributeNS(node, this.namespaces.xlink, 
                    "href");
                this.readChildNodes(node, obj);
            }
        },
        "ows": OpenLayers.Format.OWSCommon.v1_0_0.prototype.readers.ows,
        "gml": OpenLayers.Format.GML.v2.prototype.readers.gml,
        "sld": OpenLayers.Format.SLD.v1_0_0.prototype.readers.sld,
        "feature": OpenLayers.Format.GML.v2.prototype.readers.feature
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "owc": {
            "OWSContext": function(options) {
                var node = this.createElementNSPlus("OWSContext", {
                    attributes: {
                        version: this.VERSION,
                        id: options.id || OpenLayers.Util.createUniqueID("OpenLayers_OWSContext_")
                    } 
                }); 
                this.writeNode("General", options, node);
                this.writeNode("ResourceList", options, node);
                return node; 
            },
            "General": function(options) {
                var node = this.createElementNSPlus("General");
                this.writeNode("ows:BoundingBox", options, node);
                this.writeNode("ows:Title", options.title || 'OpenLayers OWSContext', node);
                return node;
            },
            "ResourceList": function(options) {
                var node = this.createElementNSPlus("ResourceList");
                for (var i=0, len=options.layers.length; i<len; i++) {
                    var layer = options.layers[i];
                    var decomposedPath = this.decomposeNestingPath(layer.metadata.nestingPath);
                    this.writeNode("_Layer", {layer: layer, subPaths: decomposedPath}, node);
                }
                return node;
            },
            "Server": function(options) {
                var node = this.createElementNSPlus("Server", {attributes: {
                    version: options.version,
                    service: options.service }
                });
                this.writeNode("OnlineResource", options, node);
                return node;
            },
            "OnlineResource": function(options) {
                var node = this.createElementNSPlus("OnlineResource", {attributes: {
                    "xlink:href": options.url }
                });
                return node;
            },
            "InlineGeometry": function(layer) {
                var node = this.createElementNSPlus("InlineGeometry");
                this.writeNode("gml:boundedBy", layer.getDataExtent(), node);
                for (var i=0, len=layer.features.length; i<len; i++) {
                    this.writeNode("gml:featureMember", layer.features[i], node);
                }
                return node;
            },
            "StyleList": function(styles) {
                var node = this.createElementNSPlus("StyleList");
                for (var i=0, len=styles.length; i<len; i++) {
                    this.writeNode("Style", styles[i], node);
                }
                return node;
            },
            "Style": function(style) {
                var node = this.createElementNSPlus("Style");
                this.writeNode("Name", style, node);
                this.writeNode("Title", style, node);
                if (style.legend) {
                    this.writeNode("LegendURL", style, node);
                }
                return node;
            },
            "Name": function(obj) {
                var node = this.createElementNSPlus("Name", {
                    value: obj.name });
                return node;
            },
            "Title": function(obj) {
                var node = this.createElementNSPlus("Title", {
                    value: obj.title });
                return node;
            },
            "LegendURL": function(style) {
                var node = this.createElementNSPlus("LegendURL");
                this.writeNode("OnlineResource", style.legend, node);
                return node;
            },
            "_WMS": function(layer) {
                var node = this.createElementNSPlus("Layer", {attributes: {
                    name: layer.params.LAYERS,
                    queryable: layer.queryable ? "1" : "0",
                    hidden: layer.visibility ? "0" : "1",
                    opacity: layer.hasOwnProperty("opacity") ? layer.opacity : null}
                });
                this.writeNode("ows:Title", layer.name, node);
                this.writeNode("ows:OutputFormat", layer.params.FORMAT, node);
                this.writeNode("Server", {service: 
                    OpenLayers.Format.Context.serviceTypes.WMS,
                    version: layer.params.VERSION, url: layer.url}, node);
                if (layer.metadata.styles && layer.metadata.styles.length > 0) {
                    this.writeNode("StyleList", layer.metadata.styles, node);
                }
                return node;
            },
            "_Layer": function(options) {
                var layer, subPaths, node, title;
                layer = options.layer;
                subPaths = options.subPaths;
                node = null;
                title = null;
                // subPaths is an array of an array
                // recursively calling _Layer writer eats up subPaths, until a 
                // real writer is called and nodes are returned.
                if(subPaths.length > 0){
                    var path = subPaths[0].join("/");
                    var index = path.lastIndexOf("/");
                    node = this.nestingLayerLookup[path];
                    title = (index > 0)?path.substring(index + 1, path.length):path;
                    if(!node){
                        // category layer
                        node = this.createElementNSPlus("Layer");
                        this.writeNode("ows:Title", title, node);
                        this.nestingLayerLookup[path] = node;
                    }
                    options.subPaths.shift();//remove a path after each call
                    this.writeNode("_Layer", options, node);
                    return node;
                } else {
                    // write out the actual layer
                    if (layer instanceof OpenLayers.Layer.WMS) {
                        node = this.writeNode("_WMS", layer);
                    } else if (layer instanceof OpenLayers.Layer.Vector) {
                        if (layer.protocol instanceof OpenLayers.Protocol.WFS.v1) {
                            node = this.writeNode("_WFS", layer);
                        } else if (layer.protocol instanceof OpenLayers.Protocol.HTTP) {
                            if (layer.protocol.format instanceof OpenLayers.Format.GML) {
                                layer.protocol.format.version = "2.1.2";
                                node = this.writeNode("_GML", layer);
                            } else if (layer.protocol.format instanceof OpenLayers.Format.KML) {
                                layer.protocol.format.version = "2.2";
                                node = this.writeNode("_KML", layer);
                            }
                        } else {
                            // write out as inline GML since we have no idea
                            // about the original Format
                            this.setNamespace("feature", this.featureNS);
                            node = this.writeNode("_InlineGeometry", layer);
                        }
                    }
                    if (layer.options.maxScale) {
                        this.writeNode("sld:MinScaleDenominator", 
                            layer.options.maxScale, node);
                    }
                    if (layer.options.minScale) {
                        this.writeNode("sld:MaxScaleDenominator", 
                            layer.options.minScale, node);
                    }
                    this.nestingLayerLookup[layer.name] = node;
                    return node;
                }
            },
            "_WFS": function(layer) {
                var node = this.createElementNSPlus("Layer", {attributes: {
                    name: layer.protocol.featurePrefix + ":" + layer.protocol.featureType,
                    hidden: layer.visibility ? "0" : "1" }
                });
                this.writeNode("ows:Title", layer.name, node);
                this.writeNode("Server", {service: 
                    OpenLayers.Format.Context.serviceTypes.WFS, 
                    version: layer.protocol.version, 
                    url: layer.protocol.url}, node);
                return node;
            },
            "_InlineGeometry": function(layer) {
                var node = this.createElementNSPlus("Layer", {attributes: {
                    name: this.featureType,
                    hidden: layer.visibility ? "0" : "1" }
                });
                this.writeNode("ows:Title", layer.name, node);
                this.writeNode("InlineGeometry", layer, node);
                return node;
            },
            "_GML": function(layer) {
                var node = this.createElementNSPlus("Layer");
                this.writeNode("ows:Title", layer.name, node);
                this.writeNode("Server", {service: 
                    OpenLayers.Format.Context.serviceTypes.GML, 
                    url: layer.protocol.url, version: 
                    layer.protocol.format.version}, node);
                return node;
            },
            "_KML": function(layer) {
                var node = this.createElementNSPlus("Layer");
                this.writeNode("ows:Title", layer.name, node);
                this.writeNode("Server", {service: 
                    OpenLayers.Format.Context.serviceTypes.KML,
                    version: layer.protocol.format.version, url: 
                    layer.protocol.url}, node);
                return node;
            }
        },
        "gml": OpenLayers.Util.applyDefaults({
            "boundedBy": function(bounds) {
                var node = this.createElementNSPlus("gml:boundedBy");
                this.writeNode("gml:Box", bounds, node);
                return node;
            }
        }, OpenLayers.Format.GML.v2.prototype.writers.gml),
        "ows": OpenLayers.Format.OWSCommon.v1_0_0.prototype.writers.ows,
        "sld": OpenLayers.Format.SLD.v1_0_0.prototype.writers.sld,
        "feature": OpenLayers.Format.GML.v2.prototype.writers.feature
    },
    
    CLASS_NAME: "OpenLayers.Format.OWSContext.v0_3_1" 

});
/* ======================================================================
    OpenLayers/Control/ScaleLine.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.ScaleLine
 * The ScaleLine displays a small line indicator representing the current 
 * map scale on the map. By default it is drawn in the lower left corner of
 * the map.
 * 
 * Inherits from:
 *  - <OpenLayers.Control>
 *  
 * Is a very close copy of:
 *  - <OpenLayers.Control.Scale>
 */
OpenLayers.Control.ScaleLine = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: maxWidth
     * {Integer} Maximum width of the scale line in pixels.  Default is 100.
     */
    maxWidth: 100,

    /**
     * Property: topOutUnits
     * {String} Units for zoomed out on top bar.  Default is km.
     */
    topOutUnits: "km",
    
    /**
     * Property: topInUnits
     * {String} Units for zoomed in on top bar.  Default is m.
     */
    topInUnits: "m",

    /**
     * Property: bottomOutUnits
     * {String} Units for zoomed out on bottom bar.  Default is mi.
     */
    bottomOutUnits: "mi",

    /**
     * Property: bottomInUnits
     * {String} Units for zoomed in on bottom bar.  Default is ft.
     */
    bottomInUnits: "ft",
    
    /**
     * Property: eTop
     * {DOMElement}
     */
    eTop: null,

    /**
     * Property: eBottom
     * {DOMElement}
     */
    eBottom:null,
    
    /**
     * APIProperty: geodesic
     * {Boolean} Use geodesic measurement. Default is false. The recommended
     * setting for maps in EPSG:4326 is false, and true EPSG:900913. If set to
     * true, the scale will be calculated based on the horizontal size of the
     * pixel in the center of the map viewport.
     */
    geodesic: false,

    /**
     * Constructor: OpenLayers.Control.ScaleLine
     * Create a new scale line control.
     * 
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */

    /**
     * Method: draw
     * 
     * Returns:
     * {DOMElement}
     */
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        if (!this.eTop) {
            // stick in the top bar
            this.eTop = document.createElement("div");
            this.eTop.className = this.displayClass + "Top";
            var theLen = this.topInUnits.length;
            this.div.appendChild(this.eTop);
            if((this.topOutUnits == "") || (this.topInUnits == "")) {
                this.eTop.style.visibility = "hidden";
            } else {
                this.eTop.style.visibility = "visible";
            }

            // and the bottom bar
            this.eBottom = document.createElement("div");
            this.eBottom.className = this.displayClass + "Bottom";
            this.div.appendChild(this.eBottom);
            if((this.bottomOutUnits == "") || (this.bottomInUnits == "")) {
                this.eBottom.style.visibility = "hidden";
            } else {
                this.eBottom.style.visibility = "visible";
            }
        }
        this.map.events.register('moveend', this, this.update);
        this.update();
        return this.div;
    },

    /** 
     * Method: getBarLen
     * Given a number, round it down to the nearest 1,2,5 times a power of 10.
     * That seems a fairly useful set of number groups to use.
     * 
     * Parameters:
     * maxLen - {float}  the number we're rounding down from
     * 
     * Returns:
     * {Float} the rounded number (less than or equal to maxLen)
     */
    getBarLen: function(maxLen) {
        // nearest power of 10 lower than maxLen
        var digits = parseInt(Math.log(maxLen) / Math.log(10));
        var pow10 = Math.pow(10, digits);
        
        // ok, find first character
        var firstChar = parseInt(maxLen / pow10);

        // right, put it into the correct bracket
        var barLen;
        if(firstChar > 5) {
            barLen = 5;
        } else if(firstChar > 2) {
            barLen = 2;
        } else {
            barLen = 1;
        }

        // scale it up the correct power of 10
        return barLen * pow10;
    },

    /**
     * Method: update
     * Update the size of the bars, and the labels they contain.
     */
    update: function() {
        var res = this.map.getResolution();
        if (!res) {
            return;
        }

        var curMapUnits = this.map.getUnits();
        var inches = OpenLayers.INCHES_PER_UNIT;

        // convert maxWidth to map units
        var maxSizeData = this.maxWidth * res * inches[curMapUnits];
        var geodesicRatio = 1;
        if(this.geodesic === true) {
            var maxSizeGeodesic = (this.map.getGeodesicPixelSize().w ||
                0.000001) * this.maxWidth;
            var maxSizeKilometers = maxSizeData / inches["km"];
            geodesicRatio = maxSizeGeodesic / maxSizeKilometers;
            maxSizeData *= geodesicRatio;
        }

        // decide whether to use large or small scale units     
        var topUnits;
        var bottomUnits;
        if(maxSizeData > 100000) {
            topUnits = this.topOutUnits;
            bottomUnits = this.bottomOutUnits;
        } else {
            topUnits = this.topInUnits;
            bottomUnits = this.bottomInUnits;
        }

        // and to map units units
        var topMax = maxSizeData / inches[topUnits];
        var bottomMax = maxSizeData / inches[bottomUnits];

        // now trim this down to useful block length
        var topRounded = this.getBarLen(topMax);
        var bottomRounded = this.getBarLen(bottomMax);

        // and back to display units
        topMax = topRounded / inches[curMapUnits] * inches[topUnits];
        bottomMax = bottomRounded / inches[curMapUnits] * inches[bottomUnits];

        // and to pixel units
        var topPx = topMax / res / geodesicRatio;
        var bottomPx = bottomMax / res / geodesicRatio;
        
        // now set the pixel widths
        // and the values inside them
        
        if (this.eBottom.style.visibility == "visible"){
            this.eBottom.style.width = Math.round(bottomPx) + "px"; 
            this.eBottom.innerHTML = bottomRounded + " " + bottomUnits ;
        }
            
        if (this.eTop.style.visibility == "visible"){
            this.eTop.style.width = Math.round(topPx) + "px";
            this.eTop.innerHTML = topRounded + " " + topUnits;
        }
        
    }, 

    CLASS_NAME: "OpenLayers.Control.ScaleLine"
});

/* ======================================================================
    OpenLayers/Icon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 */

/**
 * Class: OpenLayers.Icon
 * 
 * The icon represents a graphical icon on the screen.  Typically used in
 * conjunction with a <OpenLayers.Marker> to represent markers on a screen.
 *
 * An icon has a url, size and position.  It also contains an offset which 
 * allows the center point to be represented correctly.  This can be
 * provided either as a fixed offset or a function provided to calculate
 * the desired offset. 
 * 
 */
OpenLayers.Icon = OpenLayers.Class({
    
    /** 
     * Property: url 
     * {String}  image url
     */
    url: null,
    
    /** 
     * Property: size 
     * {<OpenLayers.Size>|Object} An OpenLayers.Size or
     * an object with a 'w' and 'h' properties.
     */
    size: null,

    /** 
     * Property: offset 
     * {<OpenLayers.Pixel>|Object} distance in pixels to offset the
     * image when being rendered. An OpenLayers.Pixel or an object
     * with a 'x' and 'y' properties.
     */
    offset: null,    
    
    /** 
     * Property: calculateOffset 
     * {Function} Function to calculate the offset (based on the size)
     */
    calculateOffset: null,    
    
    /** 
     * Property: imageDiv 
     * {DOMElement} 
     */
    imageDiv: null,

    /** 
     * Property: px 
     * {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object
     * with a 'x' and 'y' properties.
     */
    px: null,
    
    /** 
     * Constructor: OpenLayers.Icon
     * Creates an icon, which is an image tag in a div.  
     *
     * url - {String} 
     * size - {<OpenLayers.Size>|Object} An OpenLayers.Size or an
     *                                   object with a 'w' and 'h'
     *                                   properties.
     * offset - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an
     *                                      object with a 'x' and 'y'
     *                                      properties.
     * calculateOffset - {Function} 
     */
    initialize: function(url, size, offset, calculateOffset) {
        this.url = url;
        this.size = size || {w: 20, h: 20};
        this.offset = offset || {x: -(this.size.w/2), y: -(this.size.h/2)};
        this.calculateOffset = calculateOffset;

        var id = OpenLayers.Util.createUniqueID("OL_Icon_");
        this.imageDiv = OpenLayers.Util.createAlphaImageDiv(id);
    },
    
    /** 
     * Method: destroy
     * Nullify references and remove event listeners to prevent circular 
     * references and memory leaks
     */
    destroy: function() {
        // erase any drawn elements
        this.erase();

        OpenLayers.Event.stopObservingElement(this.imageDiv.firstChild); 
        this.imageDiv.innerHTML = "";
        this.imageDiv = null;
    },

    /** 
     * Method: clone
     * 
     * Returns:
     * {<OpenLayers.Icon>} A fresh copy of the icon.
     */
    clone: function() {
        return new OpenLayers.Icon(this.url, 
                                   this.size, 
                                   this.offset, 
                                   this.calculateOffset);
    },
    
    /**
     * Method: setSize
     * 
     * Parameters:
     * size - {<OpenLayers.Size>|Object} An OpenLayers.Size or
     * an object with a 'w' and 'h' properties.
     */
    setSize: function(size) {
        if (size != null) {
            this.size = size;
        }
        this.draw();
    },
    
    /**
     * Method: setUrl
     * 
     * Parameters:
     * url - {String} 
     */
    setUrl: function(url) {
        if (url != null) {
            this.url = url;
        }
        this.draw();
    },

    /** 
     * Method: draw
     * Move the div to the given pixel.
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an
     *                                  object with a 'x' and 'y' properties.
     * 
     * Returns:
     * {DOMElement} A new DOM Image of this icon set at the location passed-in
     */
    draw: function(px) {
        OpenLayers.Util.modifyAlphaImageDiv(this.imageDiv, 
                                            null, 
                                            null, 
                                            this.size, 
                                            this.url, 
                                            "absolute");
        this.moveTo(px);
        return this.imageDiv;
    }, 

    /** 
     * Method: erase
     * Erase the underlying image element.
     */
    erase: function() {
        if (this.imageDiv != null && this.imageDiv.parentNode != null) {
            OpenLayers.Element.remove(this.imageDiv);
        }
    }, 
    
    /** 
     * Method: setOpacity
     * Change the icon's opacity
     *
     * Parameters:
     * opacity - {float} 
     */
    setOpacity: function(opacity) {
        OpenLayers.Util.modifyAlphaImageDiv(this.imageDiv, null, null, null, 
                                            null, null, null, null, opacity);

    },
    
    /**
     * Method: moveTo
     * move icon to passed in px.
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>|Object} the pixel position to move to.
     * An OpenLayers.Pixel or an object with a 'x' and 'y' properties.
     */
    moveTo: function (px) {
        //if no px passed in, use stored location
        if (px != null) {
            this.px = px;
        }

        if (this.imageDiv != null) {
            if (this.px == null) {
                this.display(false);
            } else {
                if (this.calculateOffset) {
                    this.offset = this.calculateOffset(this.size);  
                }
                OpenLayers.Util.modifyAlphaImageDiv(this.imageDiv, null, {
                    x: this.px.x + this.offset.x,
                    y: this.px.y + this.offset.y
                });
            }
        }
    },
    
    /** 
     * Method: display
     * Hide or show the icon
     *
     * Parameters:
     * display - {Boolean} 
     */
    display: function(display) {
        this.imageDiv.style.display = (display) ? "" : "none"; 
    },
    

    /**
     * APIMethod: isDrawn
     * 
     * Returns:
     * {Boolean} Whether or not the icon is drawn.
     */
    isDrawn: function() {
        // nodeType 11 for ie, whose nodes *always* have a parentNode
        // (of type document fragment)
        var isDrawn = (this.imageDiv && this.imageDiv.parentNode && 
                       (this.imageDiv.parentNode.nodeType != 11));    

        return isDrawn;   
    },

    CLASS_NAME: "OpenLayers.Icon"
});
/* ======================================================================
    OpenLayers/Marker.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Events.js
 * @requires OpenLayers/Icon.js
 */

/**
 * Class: OpenLayers.Marker
 * Instances of OpenLayers.Marker are a combination of a 
 * <OpenLayers.LonLat> and an <OpenLayers.Icon>.  
 *
 * Markers are generally added to a special layer called
 * <OpenLayers.Layer.Markers>.
 *
 * Example:
 * (code)
 * var markers = new OpenLayers.Layer.Markers( "Markers" );
 * map.addLayer(markers);
 *
 * var size = new OpenLayers.Size(21,25);
 * var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
 * var icon = new OpenLayers.Icon('http://www.openlayers.org/dev/img/marker.png', size, offset);
 * markers.addMarker(new OpenLayers.Marker(new OpenLayers.LonLat(0,0),icon));
 * markers.addMarker(new OpenLayers.Marker(new OpenLayers.LonLat(0,0),icon.clone()));
 *
 * (end)
 *
 * Note that if you pass an icon into the Marker constructor, it will take
 * that icon and use it. This means that you should not share icons between
 * markers -- you use them once, but you should clone() for any additional
 * markers using that same icon.
 */
OpenLayers.Marker = OpenLayers.Class({
    
    /** 
     * Property: icon 
     * {<OpenLayers.Icon>} The icon used by this marker.
     */
    icon: null,

    /** 
     * Property: lonlat 
     * {<OpenLayers.LonLat>} location of object
     */
    lonlat: null,
    
    /** 
     * Property: events 
     * {<OpenLayers.Events>} the event handler.
     */
    events: null,
    
    /** 
     * Property: map 
     * {<OpenLayers.Map>} the map this marker is attached to
     */
    map: null,
    
    /** 
     * Constructor: OpenLayers.Marker
     *
     * Parameters:
     * lonlat - {<OpenLayers.LonLat>} the position of this marker
     * icon - {<OpenLayers.Icon>}  the icon for this marker
     */
    initialize: function(lonlat, icon) {
        this.lonlat = lonlat;
        
        var newIcon = (icon) ? icon : OpenLayers.Marker.defaultIcon();
        if (this.icon == null) {
            this.icon = newIcon;
        } else {
            this.icon.url = newIcon.url;
            this.icon.size = newIcon.size;
            this.icon.offset = newIcon.offset;
            this.icon.calculateOffset = newIcon.calculateOffset;
        }
        this.events = new OpenLayers.Events(this, this.icon.imageDiv);
    },
    
    /**
     * APIMethod: destroy
     * Destroy the marker. You must first remove the marker from any 
     * layer which it has been added to, or you will get buggy behavior.
     * (This can not be done within the marker since the marker does not
     * know which layer it is attached to.)
     */
    destroy: function() {
        // erase any drawn features
        this.erase();

        this.map = null;

        this.events.destroy();
        this.events = null;

        if (this.icon != null) {
            this.icon.destroy();
            this.icon = null;
        }
    },
    
    /** 
    * Method: draw
    * Calls draw on the icon, and returns that output.
    * 
    * Parameters:
    * px - {<OpenLayers.Pixel>}
    * 
    * Returns:
    * {DOMElement} A new DOM Image with this marker's icon set at the 
    * location passed-in
    */
    draw: function(px) {
        return this.icon.draw(px);
    }, 

    /** 
    * Method: erase
    * Erases any drawn elements for this marker.
    */
    erase: function() {
        if (this.icon != null) {
            this.icon.erase();
        }
    }, 

    /**
    * Method: moveTo
    * Move the marker to the new location.
    *
    * Parameters:
    * px - {<OpenLayers.Pixel>|Object} the pixel position to move to.
    * An OpenLayers.Pixel or an object with a 'x' and 'y' properties.
    */
    moveTo: function (px) {
        if ((px != null) && (this.icon != null)) {
            this.icon.moveTo(px);
        }           
        this.lonlat = this.map.getLonLatFromLayerPx(px);
    },

    /**
     * APIMethod: isDrawn
     * 
     * Returns:
     * {Boolean} Whether or not the marker is drawn.
     */
    isDrawn: function() {
        var isDrawn = (this.icon && this.icon.isDrawn());
        return isDrawn;   
    },

    /**
     * Method: onScreen
     *
     * Returns:
     * {Boolean} Whether or not the marker is currently visible on screen.
     */
    onScreen:function() {
        
        var onScreen = false;
        if (this.map) {
            var screenBounds = this.map.getExtent();
            onScreen = screenBounds.containsLonLat(this.lonlat);
        }    
        return onScreen;
    },
    
    /**
     * Method: inflate
     * Englarges the markers icon by the specified ratio.
     *
     * Parameters:
     * inflate - {float} the ratio to enlarge the marker by (passing 2
     *                   will double the size).
     */
    inflate: function(inflate) {
        if (this.icon) {
            this.icon.setSize({
                w: this.icon.size.w * inflate,
                h: this.icon.size.h * inflate
            });
        }        
    },
    
    /** 
     * Method: setOpacity
     * Change the opacity of the marker by changin the opacity of 
     *   its icon
     * 
     * Parameters:
     * opacity - {float}  Specified as fraction (0.4, etc)
     */
    setOpacity: function(opacity) {
        this.icon.setOpacity(opacity);
    },

    /**
     * Method: setUrl
     * Change URL of the Icon Image.
     * 
     * url - {String} 
     */
    setUrl: function(url) {
        this.icon.setUrl(url);
    },    

    /** 
     * Method: display
     * Hide or show the icon
     * 
     * display - {Boolean} 
     */
    display: function(display) {
        this.icon.display(display);
    },

    CLASS_NAME: "OpenLayers.Marker"
});


/**
 * Function: defaultIcon
 * Creates a default <OpenLayers.Icon>.
 * 
 * Returns:
 * {<OpenLayers.Icon>} A default OpenLayers.Icon to use for a marker
 */
OpenLayers.Marker.defaultIcon = function() {
    return new OpenLayers.Icon(OpenLayers.Util.getImageLocation("marker.png"),
                               {w: 21, h: 25}, {x: -10.5, y: -25});
};
    

/* ======================================================================
    OpenLayers/Layer/TileCache.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.TileCache
 * A read only TileCache layer.  Used to requests tiles cached by TileCache in
 *     a web accessible cache.  This means that you have to pre-populate your
 *     cache before this layer can be used.  It is meant only to read tiles
 *     created by TileCache, and not to make calls to TileCache for tile
 *     creation.  Create a new instance with the
 *     <OpenLayers.Layer.TileCache> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.TileCache = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /** 
     * APIProperty: isBaseLayer
     * {Boolean} Treat this layer as a base layer.  Default is true.
     */
    isBaseLayer: true,
    
    /** 
     * APIProperty: format
     * {String} Mime type of the images returned.  Default is image/png.
     */
    format: 'image/png',

    /**
     * APIProperty: serverResolutions
     * {Array} A list of all resolutions available on the server.  Only set this
     *     property if the map resolutions differ from the server. This
     *     property serves two purposes. (a) <serverResolutions> can include
     *     resolutions that the server supports and that you don't want to
     *     provide with this layer. (b) The map can work with resolutions
     *     that aren't supported by the server, i.e. that aren't in
     *     <serverResolutions>. When the map is displayed in such a resolution
     *     data for the closest server-supported resolution is loaded and the
     *     layer div is stretched as necessary.
     */
    serverResolutions: null,

    /**
     * Constructor: OpenLayers.Layer.TileCache
     * Create a new read only TileCache layer.
     *
     * Parameters:
     * name - {String} Name of the layer displayed in the interface
     * url - {String} Location of the web accessible cache (not the location of
     *     your tilecache script!)
     * layername - {String} Layer name as defined in the TileCache 
     *     configuration
     * options - {Object} Optional object with properties to be set on the
     *     layer.  Note that you should speficy your resolutions to match
     *     your TileCache configuration.  This can be done by setting
     *     the resolutions array directly (here or on the map), by setting
     *     maxResolution and numZoomLevels, or by using scale based properties.
     */
    initialize: function(name, url, layername, options) {
        this.layername = layername;
        OpenLayers.Layer.Grid.prototype.initialize.apply(this,
                                                         [name, url, {}, options]);
        this.extension = this.format.split('/')[1].toLowerCase();
        this.extension = (this.extension == 'jpg') ? 'jpeg' : this.extension;
    },    

    /**
     * APIMethod: clone
     * obj - {Object} 
     * 
     * Returns:
     * {<OpenLayers.Layer.TileCache>} An exact clone of this 
     *     <OpenLayers.Layer.TileCache>
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.TileCache(this.name,
                                                 this.url,
                                                 this.layername,
                                                 this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },    
    
    /**
     * Method: getURL
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     * 
     * Returns:
     * {String} A string with the layer's url and parameters and also the 
     *     passed-in bounds and appropriate tile size specified as parameters.
     */
    getURL: function(bounds) {
        var res = this.getServerResolution();
        var bbox = this.maxExtent;
        var size = this.tileSize;
        var tileX = Math.round((bounds.left - bbox.left) / (res * size.w));
        var tileY = Math.round((bounds.bottom - bbox.bottom) / (res * size.h));
        var tileZ = this.serverResolutions != null ?
            OpenLayers.Util.indexOf(this.serverResolutions, res) :
            this.map.getZoom();
        /**
         * Zero-pad a positive integer.
         * number - {Int} 
         * length - {Int} 
         *
         * Returns:
         * {String} A zero-padded string
         */
        function zeroPad(number, length) {
            number = String(number);
            var zeros = [];
            for(var i=0; i<length; ++i) {
                zeros.push('0');
            }
            return zeros.join('').substring(0, length - number.length) + number;
        }
        var components = [
            this.layername,
            zeroPad(tileZ, 2),
            zeroPad(parseInt(tileX / 1000000), 3),
            zeroPad((parseInt(tileX / 1000) % 1000), 3),
            zeroPad((parseInt(tileX) % 1000), 3),
            zeroPad(parseInt(tileY / 1000000), 3),
            zeroPad((parseInt(tileY / 1000) % 1000), 3),
            zeroPad((parseInt(tileY) % 1000), 3) + '.' + this.extension
        ];
        var path = components.join('/'); 
        var url = this.url;
        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(path, url);
        }
        url = (url.charAt(url.length - 1) == '/') ? url : url + '/';
        return url + path;
    },
    
    CLASS_NAME: "OpenLayers.Layer.TileCache"
});
/* ======================================================================
    OpenLayers/Layer/KaMap.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.KaMap
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.KaMap = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /** 
     * APIProperty: isBaseLayer
     * {Boolean} KaMap Layer is always a base layer 
     */    
    isBaseLayer: true,

    /**
     * Constant: DEFAULT_PARAMS
     * {Object} parameters set by default. The default parameters set 
     * the format via the 'i' parameter to 'jpeg'.    
     */
    DEFAULT_PARAMS: {
        i: 'jpeg',
        map: ''
    },
        
    /**
     * Constructor: OpenLayers.Layer.KaMap
     * 
     * Parameters:
     * name - {String}
     * url - {String}
     * params - {Object} Parameters to be sent to the HTTP server in the
     *    query string for the tile. The format can be set via the 'i'
     *    parameter (defaults to jpg) , and the map should be set via 
     *    the 'map' parameter. It has been reported that ka-Map may behave
     *    inconsistently if your format parameter does not match the format
     *    parameter configured in your config.php. (See ticket #327 for more
     *    information.)
     * options - {Object} Additional options for the layer. Any of the 
     *     APIProperties listed on this layer, and any layer types it
     *     extends, can be overridden through the options parameter. 
     */
    initialize: function(name, url, params, options) {
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, arguments);
        this.params = OpenLayers.Util.applyDefaults(
            this.params, this.DEFAULT_PARAMS
        );
    },

    /**
     * Method: getURL
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     * 
     * Returns:
     * {String} A string with the layer's url and parameters and also the 
     *          passed-in bounds and appropriate tile size specified as 
     *          parameters
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        var mapRes = this.map.getResolution();
        var scale = Math.round((this.map.getScale() * 10000)) / 10000;
        var pX = Math.round(bounds.left / mapRes);
        var pY = -Math.round(bounds.top / mapRes);
        return this.getFullRequestString(
                      { t: pY, 
                        l: pX,
                        s: scale
                      });
    },

    /** 
     * Method: calculateGridLayout
     * ka-Map uses the center point of the map as an origin for 
     * its tiles. Override calculateGridLayout to center tiles 
     * correctly for this case.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bound>}
     * origin - {<OpenLayers.LonLat>}
     * resolution - {Number}
     *
     * Returns:
     * {Object} Object containing properties tilelon, tilelat, tileoffsetlat,
     * tileoffsetlat, tileoffsetx, tileoffsety
     */
    calculateGridLayout: function(bounds, origin, resolution) {
        var tilelon = resolution*this.tileSize.w;
        var tilelat = resolution*this.tileSize.h;
        
        var offsetlon = bounds.left;
        var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
        var tilecolremain = offsetlon/tilelon - tilecol;
        var tileoffsetx = -tilecolremain * this.tileSize.w;
        var tileoffsetlon = tilecol * tilelon;
        
        var offsetlat = bounds.top;  
        var tilerow = Math.ceil(offsetlat/tilelat) + this.buffer;
        var tilerowremain = tilerow - offsetlat/tilelat;
        var tileoffsety = -(tilerowremain+1) * this.tileSize.h;
        var tileoffsetlat = tilerow * tilelat;
        
        return { 
          tilelon: tilelon, tilelat: tilelat,
          tileoffsetlon: tileoffsetlon, tileoffsetlat: tileoffsetlat,
          tileoffsetx: tileoffsetx, tileoffsety: tileoffsety
        };
    },    

    /**
     * APIMethod: clone
     * 
     * Parameters: 
     * obj - {Object}
     * 
     * Returns:
     * {<OpenLayers.Layer.Kamap>} An exact clone of this OpenLayers.Layer.KaMap
     */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.KaMap(this.name,
                                            this.url,
                                            this.params,
                                            this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here
        if (this.tileSize != null) {
            obj.tileSize = this.tileSize.clone();
        }
        
        // we do not want to copy reference to grid, so we make a new array
        obj.grid = [];

        return obj;
    },    
    
    /**
     * APIMethod: getTileBounds
     * Returns The tile bounds for a layer given a pixel location.
     *
     * Parameters:
     * viewPortPx - {<OpenLayers.Pixel>} The location in the viewport.
     *
     * Returns:
     * {<OpenLayers.Bounds>} Bounds of the tile at the given pixel location.
     */
    getTileBounds: function(viewPortPx) {
        var resolution = this.getResolution();
        var tileMapWidth = resolution * this.tileSize.w;
        var tileMapHeight = resolution * this.tileSize.h;
        var mapPoint = this.getLonLatFromViewPortPx(viewPortPx);
        var tileLeft = tileMapWidth * Math.floor(mapPoint.lon / tileMapWidth);
        var tileBottom = tileMapHeight * Math.floor(mapPoint.lat / tileMapHeight);
        return new OpenLayers.Bounds(tileLeft, tileBottom,
                                     tileLeft + tileMapWidth,
                                     tileBottom + tileMapHeight);
    },

    CLASS_NAME: "OpenLayers.Layer.KaMap"
});
/* ======================================================================
    OpenLayers/Control/TransformFeature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Control/DragFeature.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Geometry/Point.js
 */

/**
 * Class: OpenLayers.Control.TransformFeature
 * Control to transform features with a standard transformation box.
 *
 * Inherits From:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.TransformFeature = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforesetfeature - Triggered before a feature is set for
     *     tranformation. The feature will not be set if a listener returns
     *     false. Listeners receive a *feature* property, with the feature
     *     that will be set for transformation. Listeners are allowed to
     *     set the control's *scale*, *ratio* and *rotation* properties,
     *     which will set the initial scale, ratio and rotation of the
     *     feature, like the <setFeature> method's initialParams argument.
     * setfeature - Triggered when a feature is set for tranformation.
     *     Listeners receive a *feature* property, with the feature that
     *     is now set for transformation.
     * beforetransform - Triggered while dragging, before a feature is
     *     transformed. The feature will not be transformed if a listener
     *     returns false (but the box still will). Listeners receive one or
     *     more of *center*, *scale*, *ratio* and *rotation*. The *center*
     *     property is an <OpenLayers.Geometry.Point> object with the new
     *     center of the transformed feature, the others are Floats with the
     *     scale, ratio or rotation change since the last transformation.
     * transform - Triggered while dragging, when a feature is transformed.
     *     Listeners receive an event object with one or more of *center*,
     *     scale*, *ratio* and *rotation*. The *center* property is an
     *     <OpenLayers.Geometry.Point> object with the new center of the
     *     transformed feature, the others are Floats with the scale, ratio
     *     or rotation change of the feature since the last transformation.
     * transformcomplete - Triggered after dragging. Listeners receive
     *     an event object with the transformed *feature*.
     */

    /**
     * APIProperty: geometryTypes
     * {Array(String)} To restrict transformation to a limited set of geometry
     *     types, send a list of strings corresponding to the geometry class
     *     names.
     */
    geometryTypes: null,

    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>}
     */
    layer: null,
    
    /**
     * APIProperty: preserveAspectRatio
     * {Boolean} set to true to not change the feature's aspect ratio.
     */
    preserveAspectRatio: false,
    
    /**
     * APIProperty: rotate
     * {Boolean} set to false if rotation should be disabled. Default is true.
     *     To be passed with the constructor or set when the control is not
     *     active.
     */
    rotate: true,
    
    /**
     * APIProperty: feature
     * {<OpenLayers.Feature.Vector>} Feature currently available for
     *     transformation. Read-only, use <setFeature> to set it manually.
     */
    feature: null,
    
    /**
     * APIProperty: renderIntent
     * {String|Object} Render intent for the transformation box and
     *     handles. A symbolizer object can also be provided here.
     */
    renderIntent: "temporary",
    
    /**
     * APIProperty: rotationHandleSymbolizer
     * {Object|String} Optional. A custom symbolizer for the rotation handles.
     *     A render intent can also be provided here. Defaults to
     *     (code)
     *     {
     *         stroke: false,
     *         pointRadius: 10,
     *         fillOpacity: 0,
     *         cursor: "pointer"
     *     }
     *     (end)
     */
    rotationHandleSymbolizer: null,
    
    /**
     * APIProperty: box
     * {<OpenLayers.Feature.Vector>} The transformation box rectangle.
     *     Read-only.
     */
    box: null,
    
    /**
     * APIProperty: center
     * {<OpenLayers.Geometry.Point>} The center of the feature bounds.
     * Read-only.
     */
    center: null,
    
    /**
     * APIProperty: scale
     * {Float} The scale of the feature, relative to the scale the time the
     *     feature was set. Read-only, except for *beforesetfeature*
     *     listeners.
     */
    scale: 1,
    
    /**
     * APIProperty: ratio
     * {Float} The ratio of the feature relative to the ratio the time the
     *     feature was set. Read-only, except for *beforesetfeature*
     *     listeners.
     */
    ratio: 1,
    
    /**
     * Property: rotation
     * {Integer} the current rotation angle of the box. Read-only, except for
     *     *beforesetfeature* listeners.
     */
    rotation: 0,
    
    /**
     * APIProperty: handles
     * {Array(<OpenLayers.Feature.Vector>)} The 8 handles currently available
     *     for scaling/resizing. Numbered counterclockwise, starting from the
     *     southwest corner. Read-only.
     */
    handles: null,
    
    /**
     * APIProperty: rotationHandles
     * {Array(<OpenLayers.Feature.Vector>)} The 4 rotation handles currently
     *     available for rotating. Numbered counterclockwise, starting from
     *     the southwest corner. Read-only.
     */
    rotationHandles: null,
    
    /**
     * Property: dragControl
     * {<OpenLayers.Control.DragFeature>}
     */
    dragControl: null,
    
    /**
     * APIProperty: irregular
     * {Boolean} Make scaling/resizing work irregularly. If true then
     *     dragging a handle causes the feature to resize in the direction
     *     of movement. If false then the feature resizes symetrically
     *     about it's center.
     */
    irregular: false,
    
    /**
     * Constructor: OpenLayers.Control.TransformFeature
     * Create a new transform feature control.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} Layer that contains features that
     *     will be transformed.
     * options - {Object} Optional object whose properties will be set on the
     *     control.
     */
    initialize: function(layer, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);

        this.layer = layer;

        if(!this.rotationHandleSymbolizer) {
            this.rotationHandleSymbolizer = {
                stroke: false,
                pointRadius: 10,
                fillOpacity: 0,
                cursor: "pointer"
            };
        }

        this.createBox();
        this.createControl();        
    },
    
    /**
     * APIMethod: activate
     * Activates the control.
     */
    activate: function() {
        var activated = false;
        if(OpenLayers.Control.prototype.activate.apply(this, arguments)) {
            this.dragControl.activate();
            this.layer.addFeatures([this.box]);
            this.rotate && this.layer.addFeatures(this.rotationHandles);
            this.layer.addFeatures(this.handles);        
            activated = true;
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivates the control.
     */
    deactivate: function() {
        var deactivated = false;
        if(OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
            this.layer.removeFeatures(this.handles);
            this.rotate && this.layer.removeFeatures(this.rotationHandles);
            this.layer.removeFeatures([this.box]);
            this.dragControl.deactivate();
            deactivated = true;
        }
        return deactivated;
    },
    
    /**
     * Method: setMap
     * 
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        this.dragControl.setMap(map);
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
    },

    /**
     * APIMethod: setFeature
     * Place the transformation box on a feature and start transforming it.
     * If the control is not active, it will be activated.
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * initialParams - {Object} Initial values for rotation, scale or ratio.
     *     Setting a rotation value here will cause the transformation box to
     *     start rotated. Setting a scale or ratio will not affect the
     *     transormation box, but applications may use this to keep track of
     *     scale and ratio of a feature across multiple transforms.
     */
    setFeature: function(feature, initialParams) {
        initialParams = OpenLayers.Util.applyDefaults(initialParams, {
            rotation: 0,
            scale: 1,
            ratio: 1
        });

        var oldRotation = this.rotation;
        var oldCenter = this.center;
        OpenLayers.Util.extend(this, initialParams);

        var cont = this.events.triggerEvent("beforesetfeature",
            {feature: feature}
        );
        if (cont === false) {
            return;
        }

        this.feature = feature;
        this.activate();

        this._setfeature = true;

        var featureBounds = this.feature.geometry.getBounds();
        this.box.move(featureBounds.getCenterLonLat());
        this.box.geometry.rotate(-oldRotation, oldCenter);
        this._angle = 0;

        var ll;
        if(this.rotation) {
            var geom = feature.geometry.clone();
            geom.rotate(-this.rotation, this.center);
            var box = new OpenLayers.Feature.Vector(
                geom.getBounds().toGeometry());
            box.geometry.rotate(this.rotation, this.center);
            this.box.geometry.rotate(this.rotation, this.center);
            this.box.move(box.geometry.getBounds().getCenterLonLat());
            var llGeom = box.geometry.components[0].components[0];
            ll = llGeom.getBounds().getCenterLonLat();
        } else {
            ll = new OpenLayers.LonLat(featureBounds.left, featureBounds.bottom);
        }
        this.handles[0].move(ll);
        
        delete this._setfeature;

        this.events.triggerEvent("setfeature", {feature: feature});
    },
    
    /**
     * APIMethod: unsetFeature
     * Remove the transformation box off any feature.
     * If the control is active, it will be deactivated first.
     */
    unsetFeature: function() {
        if (this.active) {
            this.deactivate();
        } else {
            this.feature = null;
            this.rotation = 0;
            this.scale = 1;
            this.ratio = 1;
        }
    },
    
    /**
     * Method: createBox
     * Creates the box with all handles and transformation handles.
     */
    createBox: function() {
        var control = this;
        
        this.center = new OpenLayers.Geometry.Point(0, 0);
        this.box = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.LineString([
                new OpenLayers.Geometry.Point(-1, -1),
                new OpenLayers.Geometry.Point(0, -1),
                new OpenLayers.Geometry.Point(1, -1),
                new OpenLayers.Geometry.Point(1, 0),
                new OpenLayers.Geometry.Point(1, 1),
                new OpenLayers.Geometry.Point(0, 1),
                new OpenLayers.Geometry.Point(-1, 1),
                new OpenLayers.Geometry.Point(-1, 0),
                new OpenLayers.Geometry.Point(-1, -1)
            ]), null,
            typeof this.renderIntent == "string" ? null : this.renderIntent
        );
        
        // Override for box move - make sure that the center gets updated
        this.box.geometry.move = function(x, y) {
            control._moving = true;
            OpenLayers.Geometry.LineString.prototype.move.apply(this, arguments);
            control.center.move(x, y);
            delete control._moving;
        };

        // Overrides for vertex move, resize and rotate - make sure that
        // handle and rotationHandle geometries are also moved, resized and
        // rotated.
        var vertexMoveFn = function(x, y) {
            OpenLayers.Geometry.Point.prototype.move.apply(this, arguments);
            this._rotationHandle && this._rotationHandle.geometry.move(x, y);
            this._handle.geometry.move(x, y);
        };
        var vertexResizeFn = function(scale, center, ratio) {
            OpenLayers.Geometry.Point.prototype.resize.apply(this, arguments);
            this._rotationHandle && this._rotationHandle.geometry.resize(
                scale, center, ratio);
            this._handle.geometry.resize(scale, center, ratio);
        };
        var vertexRotateFn = function(angle, center) {
            OpenLayers.Geometry.Point.prototype.rotate.apply(this, arguments);
            this._rotationHandle && this._rotationHandle.geometry.rotate(
                angle, center);
            this._handle.geometry.rotate(angle, center);
        };
        
        // Override for handle move - make sure that the box and other handles
        // are updated, and finally transform the feature.
        var handleMoveFn = function(x, y) {
            var oldX = this.x, oldY = this.y;
            OpenLayers.Geometry.Point.prototype.move.call(this, x, y);
            if(control._moving) {
                return;
            }
            var evt = control.dragControl.handlers.drag.evt;
            var preserveAspectRatio = !control._setfeature &&
                control.preserveAspectRatio;
            var reshape = !preserveAspectRatio && !(evt && evt.shiftKey);
            var oldGeom = new OpenLayers.Geometry.Point(oldX, oldY);
            var centerGeometry = control.center;
            this.rotate(-control.rotation, centerGeometry);
            oldGeom.rotate(-control.rotation, centerGeometry);
            var dx1 = this.x - centerGeometry.x;
            var dy1 = this.y - centerGeometry.y;
            var dx0 = dx1 - (this.x - oldGeom.x);
            var dy0 = dy1 - (this.y - oldGeom.y);
            if (control.irregular && !control._setfeature) {
               dx1 -= (this.x - oldGeom.x) / 2;
               dy1 -= (this.y - oldGeom.y) / 2;
            }
            this.x = oldX;
            this.y = oldY;
            var scale, ratio = 1;
            if (reshape) {
                scale = Math.abs(dy0) < 0.00001 ? 1 : dy1 / dy0;
                ratio = (Math.abs(dx0) < 0.00001 ? 1 : (dx1 / dx0)) / scale;
            } else {
                var l0 = Math.sqrt((dx0 * dx0) + (dy0 * dy0));
                var l1 = Math.sqrt((dx1 * dx1) + (dy1 * dy1));
                scale = l1 / l0;
            }

            // rotate the box to 0 before resizing - saves us some
            // calculations and is inexpensive because we don't drawFeature.
            control._moving = true;
            control.box.geometry.rotate(-control.rotation, centerGeometry);
            delete control._moving;

            control.box.geometry.resize(scale, centerGeometry, ratio);
            control.box.geometry.rotate(control.rotation, centerGeometry);
            control.transformFeature({scale: scale, ratio: ratio});
            if (control.irregular && !control._setfeature) {
               var newCenter = centerGeometry.clone();
               newCenter.x += Math.abs(oldX - centerGeometry.x) < 0.00001 ? 0 : (this.x - oldX);
               newCenter.y += Math.abs(oldY - centerGeometry.y) < 0.00001 ? 0 : (this.y - oldY);
               control.box.geometry.move(this.x - oldX, this.y - oldY);
               control.transformFeature({center: newCenter});
            }
        };
        
        // Override for rotation handle move - make sure that the box and
        // other handles are updated, and finally transform the feature.
        var rotationHandleMoveFn = function(x, y){
            var oldX = this.x, oldY = this.y;
            OpenLayers.Geometry.Point.prototype.move.call(this, x, y);
            if(control._moving) {
                return;
            }
            var evt = control.dragControl.handlers.drag.evt;
            var constrain = (evt && evt.shiftKey) ? 45 : 1;
            var centerGeometry = control.center;
            var dx1 = this.x - centerGeometry.x;
            var dy1 = this.y - centerGeometry.y;
            var dx0 = dx1 - x;
            var dy0 = dy1 - y;
            this.x = oldX;
            this.y = oldY;
            var a0 = Math.atan2(dy0, dx0);
            var a1 = Math.atan2(dy1, dx1);
            var angle = a1 - a0;
            angle *= 180 / Math.PI;
            control._angle = (control._angle + angle) % 360;
            var diff = control.rotation % constrain;
            if(Math.abs(control._angle) >= constrain || diff !== 0) {
                angle = Math.round(control._angle / constrain) * constrain -
                    diff;
                control._angle = 0;
                control.box.geometry.rotate(angle, centerGeometry);
                control.transformFeature({rotation: angle});
            } 
        };

        var handles = new Array(8);
        var rotationHandles = new Array(4);
        var geom, handle, rotationHandle;
        var positions = ["sw", "s", "se", "e", "ne", "n", "nw", "w"];
        for(var i=0; i<8; ++i) {
            geom = this.box.geometry.components[i];
            handle = new OpenLayers.Feature.Vector(geom.clone(), {
                role: positions[i] + "-resize"
            }, typeof this.renderIntent == "string" ? null :
                this.renderIntent);
            if(i % 2 == 0) {
                rotationHandle = new OpenLayers.Feature.Vector(geom.clone(), {
                    role: positions[i] + "-rotate"
                }, typeof this.rotationHandleSymbolizer == "string" ?
                    null : this.rotationHandleSymbolizer);
                rotationHandle.geometry.move = rotationHandleMoveFn;
                geom._rotationHandle = rotationHandle;
                rotationHandles[i/2] = rotationHandle;
            }
            geom.move = vertexMoveFn;
            geom.resize = vertexResizeFn;
            geom.rotate = vertexRotateFn;
            handle.geometry.move = handleMoveFn;
            geom._handle = handle;
            handles[i] = handle;
        }
        
        this.rotationHandles = rotationHandles;
        this.handles = handles;
    },
    
    /**
     * Method: createControl
     * Creates a DragFeature control for this control.
     */
    createControl: function() {
        var control = this;
        this.dragControl = new OpenLayers.Control.DragFeature(this.layer, {
            documentDrag: true,
            // avoid moving the feature itself - move the box instead
            moveFeature: function(pixel) {
                if(this.feature === control.feature) {
                    this.feature = control.box;
                }
                OpenLayers.Control.DragFeature.prototype.moveFeature.apply(this,
                    arguments);
            },
            // transform while dragging
            onDrag: function(feature, pixel) {
                if(feature === control.box) {
                    control.transformFeature({center: control.center});
                }
            },
            // set a new feature
            onStart: function(feature, pixel) {
                var eligible = !control.geometryTypes ||
                    OpenLayers.Util.indexOf(control.geometryTypes,
                        feature.geometry.CLASS_NAME) !== -1;
                var i = OpenLayers.Util.indexOf(control.handles, feature);
                i += OpenLayers.Util.indexOf(control.rotationHandles,
                    feature);
                if(feature !== control.feature && feature !== control.box &&
                                                        i == -2 && eligible) {
                    control.setFeature(feature);
                }
            },
            onComplete: function(feature, pixel) {
                control.events.triggerEvent("transformcomplete",
                    {feature: control.feature});
            }
        });
    },
    
    /**
     * Method: drawHandles
     * Draws the handles to match the box.
     */
    drawHandles: function() {
        var layer = this.layer;
        for(var i=0; i<8; ++i) {
            if(this.rotate && i % 2 === 0) {
                layer.drawFeature(this.rotationHandles[i/2],
                    this.rotationHandleSymbolizer);
            }
            layer.drawFeature(this.handles[i], this.renderIntent);
        }
    },
    
    /**
     * Method: transformFeature
     * Transforms the feature.
     * 
     * Parameters:
     * mods - {Object} An object with optional scale, ratio, rotation and
     *     center properties.
     */
    transformFeature: function(mods) {
        if(!this._setfeature) {
            this.scale *= (mods.scale || 1);
            this.ratio *= (mods.ratio || 1);
            var oldRotation = this.rotation;
            this.rotation = (this.rotation + (mods.rotation || 0)) % 360;
            
            if(this.events.triggerEvent("beforetransform", mods) !== false) {
                var feature = this.feature;
                var geom = feature.geometry;
                var center = this.center;
                geom.rotate(-oldRotation, center);
                if(mods.scale || mods.ratio) {
                    geom.resize(mods.scale, center, mods.ratio);
                } else if(mods.center) {
                    feature.move(mods.center.getBounds().getCenterLonLat());
                }
                geom.rotate(this.rotation, center);
                this.layer.drawFeature(feature);
                feature.toState(OpenLayers.State.UPDATE);
                this.events.triggerEvent("transform", mods);
            }
        }
        this.layer.drawFeature(this.box, this.renderIntent);
        this.drawHandles();
    },
        
    /**
     * APIMethod: destroy
     * Take care of things that are not handled in superclass.
     */
    destroy: function() {
        var geom;
        for(var i=0; i<8; ++i) {
            geom = this.box.geometry.components[i];
            geom._handle.destroy();
            geom._handle = null;
            geom._rotationHandle && geom._rotationHandle.destroy();
            geom._rotationHandle = null;
        }
        this.center = null;
        this.feature = null;
        this.handles = null;
        this.rotationHandleSymbolizer = null;
        this.rotationHandles = null;
        this.box.destroy();
        this.box = null;
        this.layer = null;
        this.dragControl.destroy();
        this.dragControl = null;
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },

    CLASS_NAME: "OpenLayers.Control.TransformFeature"
});
/* ======================================================================
    OpenLayers/Handler/Box.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 * @requires OpenLayers/Handler/Drag.js
 */

/**
 * Class: OpenLayers.Handler.Box
 * Handler for dragging a rectangle across the map.  Box is displayed 
 * on mouse down, moves on mouse move, and is finished on mouse up.
 *
 * Inherits from:
 *  - <OpenLayers.Handler> 
 */
OpenLayers.Handler.Box = OpenLayers.Class(OpenLayers.Handler, {

    /** 
     * Property: dragHandler 
     * {<OpenLayers.Handler.Drag>} 
     */
    dragHandler: null,

    /**
     * APIProperty: boxDivClassName
     * {String} The CSS class to use for drawing the box. Default is
     *     olHandlerBoxZoomBox
     */
    boxDivClassName: 'olHandlerBoxZoomBox',
    
    /**
     * Property: boxOffsets
     * {Object} Caches box offsets from css. This is used by the getBoxOffsets
     * method.
     */
    boxOffsets: null,

    /**
     * Constructor: OpenLayers.Handler.Box
     *
     * Parameters:
     * control - {<OpenLayers.Control>} 
     * callbacks - {Object} An object with a properties whose values are
     *     functions.  Various callbacks described below.
     * options - {Object} 
     *
     * Named callbacks:
     * start - Called when the box drag operation starts.
     * done - Called when the box drag operation is finished.
     *     The callback should expect to receive a single argument, the box 
     *     bounds or a pixel. If the box dragging didn't span more than a 5 
     *     pixel distance, a pixel will be returned instead of a bounds object.
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Handler.prototype.initialize.apply(this, arguments);
        this.dragHandler = new OpenLayers.Handler.Drag(
            this, 
            {
                down: this.startBox, 
                move: this.moveBox, 
                out: this.removeBox,
                up: this.endBox
            }, 
            {keyMask: this.keyMask}
        );
    },

    /**
     * Method: destroy
     */
    destroy: function() {
        OpenLayers.Handler.prototype.destroy.apply(this, arguments);
        if (this.dragHandler) {
            this.dragHandler.destroy();
            this.dragHandler = null;
        }            
    },

    /**
     * Method: setMap
     */
    setMap: function (map) {
        OpenLayers.Handler.prototype.setMap.apply(this, arguments);
        if (this.dragHandler) {
            this.dragHandler.setMap(map);
        }
    },

    /**
    * Method: startBox
    *
    * Parameters:
    * xy - {<OpenLayers.Pixel>}
    */
    startBox: function (xy) {
        this.callback("start", []);
        this.zoomBox = OpenLayers.Util.createDiv('zoomBox', {
            x: -9999, y: -9999
        });
        this.zoomBox.className = this.boxDivClassName;                                         
        this.zoomBox.style.zIndex = this.map.Z_INDEX_BASE["Popup"] - 1;
        
        this.map.viewPortDiv.appendChild(this.zoomBox);
        
        OpenLayers.Element.addClass(
            this.map.viewPortDiv, "olDrawBox"
        );
    },

    /**
    * Method: moveBox
    */
    moveBox: function (xy) {
        var startX = this.dragHandler.start.x;
        var startY = this.dragHandler.start.y;
        var deltaX = Math.abs(startX - xy.x);
        var deltaY = Math.abs(startY - xy.y);

        var offset = this.getBoxOffsets();
        this.zoomBox.style.width = (deltaX + offset.width + 1) + "px";
        this.zoomBox.style.height = (deltaY + offset.height + 1) + "px";
        this.zoomBox.style.left = (xy.x < startX ?
            startX - deltaX - offset.left : startX - offset.left) + "px";
        this.zoomBox.style.top = (xy.y < startY ?
            startY - deltaY - offset.top : startY - offset.top) + "px";
    },

    /**
    * Method: endBox
    */
    endBox: function(end) {
        var result;
        if (Math.abs(this.dragHandler.start.x - end.x) > 5 ||    
            Math.abs(this.dragHandler.start.y - end.y) > 5) {   
            var start = this.dragHandler.start;
            var top = Math.min(start.y, end.y);
            var bottom = Math.max(start.y, end.y);
            var left = Math.min(start.x, end.x);
            var right = Math.max(start.x, end.x);
            result = new OpenLayers.Bounds(left, bottom, right, top);
        } else {
            result = this.dragHandler.start.clone(); // i.e. OL.Pixel
        } 
        this.removeBox();

        this.callback("done", [result]);
    },

    /**
     * Method: removeBox
     * Remove the zoombox from the screen and nullify our reference to it.
     */
    removeBox: function() {
        this.map.viewPortDiv.removeChild(this.zoomBox);
        this.zoomBox = null;
        this.boxOffsets = null;
        OpenLayers.Element.removeClass(
            this.map.viewPortDiv, "olDrawBox"
        );

    },

    /**
     * Method: activate
     */
    activate: function () {
        if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            this.dragHandler.activate();
            return true;
        } else {
            return false;
        }
    },

    /**
     * Method: deactivate
     */
    deactivate: function () {
        if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            if (this.dragHandler.deactivate()) {
                if (this.zoomBox) {
                    this.removeBox();
                }
            }
            return true;
        } else {
            return false;
        }
    },
    
    /**
     * Method: getBoxOffsets
     * Determines border offsets for a box, according to the box model.
     * 
     * Returns:
     * {Object} an object with the following offsets:
     *     - left
     *     - right
     *     - top
     *     - bottom
     *     - width
     *     - height
     */
    getBoxOffsets: function() {
        if (!this.boxOffsets) {
            // Determine the box model. If the testDiv's clientWidth is 3, then
            // the borders are outside and we are dealing with the w3c box
            // model. Otherwise, the browser uses the traditional box model and
            // the borders are inside the box bounds, leaving us with a
            // clientWidth of 1.
            var testDiv = document.createElement("div");
            //testDiv.style.visibility = "hidden";
            testDiv.style.position = "absolute";
            testDiv.style.border = "1px solid black";
            testDiv.style.width = "3px";
            document.body.appendChild(testDiv);
            var w3cBoxModel = testDiv.clientWidth == 3;
            document.body.removeChild(testDiv);
            
            var left = parseInt(OpenLayers.Element.getStyle(this.zoomBox,
                "border-left-width"));
            var right = parseInt(OpenLayers.Element.getStyle(
                this.zoomBox, "border-right-width"));
            var top = parseInt(OpenLayers.Element.getStyle(this.zoomBox,
                "border-top-width"));
            var bottom = parseInt(OpenLayers.Element.getStyle(
                this.zoomBox, "border-bottom-width"));
            this.boxOffsets = {
                left: left,
                right: right,
                top: top,
                bottom: bottom,
                width: w3cBoxModel === false ? left + right : 0,
                height: w3cBoxModel === false ? top + bottom : 0
            };
        }
        return this.boxOffsets;
    },
  
    CLASS_NAME: "OpenLayers.Handler.Box"
});
/* ======================================================================
    OpenLayers/Control/ZoomBox.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Box.js
 */

/**
 * Class: OpenLayers.Control.ZoomBox
 * The ZoomBox control enables zooming directly to a given extent, by drawing 
 * a box on the map. The box is drawn by holding down shift, whilst dragging 
 * the mouse.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.ZoomBox = OpenLayers.Class(OpenLayers.Control, {
    /**
     * Property: type
     * {OpenLayers.Control.TYPE}
     */
    type: OpenLayers.Control.TYPE_TOOL,

    /**
     * Property: out
     * {Boolean} Should the control be used for zooming out?
     */
    out: false,

    /**
     * APIProperty: keyMask
     * {Integer} Zoom only occurs if the keyMask matches the combination of 
     *     keys down. Use bitwise operators and one or more of the
     *     <OpenLayers.Handler> constants to construct a keyMask. Leave null if 
     *     not used mask. Default is null.
     */
    keyMask: null,

    /**
     * APIProperty: alwaysZoom
     * {Boolean} Always zoom in/out, when box drawed 
     */
    alwaysZoom: false,

    /**
     * Method: draw
     */    
    draw: function() {
        this.handler = new OpenLayers.Handler.Box( this,
                            {done: this.zoomBox}, {keyMask: this.keyMask} );
    },

    /**
     * Method: zoomBox
     *
     * Parameters:
     * position - {<OpenLayers.Bounds>} or {<OpenLayers.Pixel>}
     */
    zoomBox: function (position) {
        if (position instanceof OpenLayers.Bounds) {
            var bounds;
            if (!this.out) {
                var minXY = this.map.getLonLatFromPixel({
                    x: position.left,
                    y: position.bottom
                });
                var maxXY = this.map.getLonLatFromPixel({
                    x: position.right,
                    y: position.top
                });
                bounds = new OpenLayers.Bounds(minXY.lon, minXY.lat,
                                               maxXY.lon, maxXY.lat);
            } else {
                var pixWidth = Math.abs(position.right-position.left);
                var pixHeight = Math.abs(position.top-position.bottom);
                var zoomFactor = Math.min((this.map.size.h / pixHeight),
                    (this.map.size.w / pixWidth));
                var extent = this.map.getExtent();
                var center = this.map.getLonLatFromPixel(
                    position.getCenterPixel());
                var xmin = center.lon - (extent.getWidth()/2)*zoomFactor;
                var xmax = center.lon + (extent.getWidth()/2)*zoomFactor;
                var ymin = center.lat - (extent.getHeight()/2)*zoomFactor;
                var ymax = center.lat + (extent.getHeight()/2)*zoomFactor;
                bounds = new OpenLayers.Bounds(xmin, ymin, xmax, ymax);
            }
            // always zoom in/out 
            var lastZoom = this.map.getZoom(); 
            this.map.zoomToExtent(bounds);
            if (lastZoom == this.map.getZoom() && this.alwaysZoom == true){ 
                this.map.zoomTo(lastZoom + (this.out ? -1 : 1)); 
            }
        } else { // it's a pixel
            if (!this.out) {
                this.map.setCenter(this.map.getLonLatFromPixel(position),
                               this.map.getZoom() + 1);
            } else {
                this.map.setCenter(this.map.getLonLatFromPixel(position),
                               this.map.getZoom() - 1);
            }
        }
    },

    CLASS_NAME: "OpenLayers.Control.ZoomBox"
});
/* ======================================================================
    OpenLayers/Control/DragPan.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Drag.js
 */

/**
 * Class: OpenLayers.Control.DragPan
 * The DragPan control pans the map with a drag of the mouse.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.DragPan = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * Property: type
     * {OpenLayers.Control.TYPES}
     */
    type: OpenLayers.Control.TYPE_TOOL,
    
    /**
     * Property: panned
     * {Boolean} The map moved.
     */
    panned: false,
    
    /**
     * Property: interval
     * {Integer} The number of milliseconds that should ellapse before
     *     panning the map again. Defaults to 1 millisecond. In most cases
     *     you won't want to change this value. For slow machines/devices
     *     larger values can be tried out.
     */
    interval: 1,
    
    /**
     * APIProperty: documentDrag
     * {Boolean} If set to true, mouse dragging will continue even if the
     *     mouse cursor leaves the map viewport. Default is false.
     */
    documentDrag: false,

    /**
     * Property: kinetic
     * {<OpenLayers.Kinetic>} The OpenLayers.Kinetic object.
     */
    kinetic: null,

    /**
     * APIProperty: enableKinetic
     * {Boolean} Set this option to enable "kinetic dragging". Can be
     *     set to true or to an object. If set to an object this
     *     object will be passed to the {<OpenLayers.Kinetic>}
     *     constructor. Defaults to false.
     *     If you set this property, you should ensure that 
     *     OpenLayers/Kinetic.js is included in your build config
     */
    enableKinetic: false,

    /**
     * APIProperty: kineticInterval
     * {Integer} Interval in milliseconds between 2 steps in the "kinetic
     *     scrolling". Applies only if enableKinetic is set. Defaults
     *     to 10 milliseconds.
     */
    kineticInterval: 10,


    /**
     * Method: draw
     * Creates a Drag handler, using <panMap> and
     * <panMapDone> as callbacks.
     */    
    draw: function() {
        if(this.enableKinetic) {
            var config = {interval: this.kineticInterval};
            if(typeof this.enableKinetic === "object") {
                config = OpenLayers.Util.extend(config, this.enableKinetic);
            }
            this.kinetic = new OpenLayers.Kinetic(config);
        }
        this.handler = new OpenLayers.Handler.Drag(this, {
                "move": this.panMap,
                "done": this.panMapDone,
                "down": this.panMapStart
            }, {
                interval: this.interval,
                documentDrag: this.documentDrag
            }
        );
    },

    /**
     * Method: panMapStart
     */
    panMapStart: function() {
        if(this.kinetic) {
            this.kinetic.begin();
        }
    },

    /**
    * Method: panMap
    *
    * Parameters:
    * xy - {<OpenLayers.Pixel>} Pixel of the mouse position
    */
    panMap: function(xy) {
        if(this.kinetic) {
            this.kinetic.update(xy);
        }
        this.panned = true;
        this.map.pan(
            this.handler.last.x - xy.x,
            this.handler.last.y - xy.y,
            {dragging: true, animate: false}
        );
    },
    
    /**
     * Method: panMapDone
     * Finish the panning operation.  Only call setCenter (through <panMap>)
     *     if the map has actually been moved.
     *
     * Parameters:
     * xy - {<OpenLayers.Pixel>} Pixel of the mouse position
     */
    panMapDone: function(xy) {
        if(this.panned) {
            var res = null;
            if (this.kinetic) {
                res = this.kinetic.end(xy);
            }
            this.map.pan(
                this.handler.last.x - xy.x,
                this.handler.last.y - xy.y,
                {dragging: !!res, animate: false}
            );
            if (res) {
                var self = this;
                this.kinetic.move(res, function(x, y, end) {
                    self.map.pan(x, y, {dragging: !end, animate: false});
                });
            }
            this.panned = false;
        }
    },

    CLASS_NAME: "OpenLayers.Control.DragPan"
});
/* ======================================================================
    OpenLayers/Handler/Click.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 */

/**
 * Class: OpenLayers.Handler.Click
 * A handler for mouse clicks.  The intention of this handler is to give
 *     controls more flexibility with handling clicks.  Browsers trigger
 *     click events twice for a double-click.  In addition, the mousedown,
 *     mousemove, mouseup sequence fires a click event.  With this handler,
 *     controls can decide whether to ignore clicks associated with a double
 *     click.  By setting a <pixelTolerance>, controls can also ignore clicks
 *     that include a drag.  Create a new instance with the
 *     <OpenLayers.Handler.Click> constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Handler> 
 */
OpenLayers.Handler.Click = OpenLayers.Class(OpenLayers.Handler, {
    /**
     * APIProperty: delay
     * {Number} Number of milliseconds between clicks before the event is
     *     considered a double-click.
     */
    delay: 300,
    
    /**
     * APIProperty: single
     * {Boolean} Handle single clicks.  Default is true.  If false, clicks
     * will not be reported.  If true, single-clicks will be reported.
     */
    single: true,
    
    /**
     * APIProperty: double
     * {Boolean} Handle double-clicks.  Default is false.
     */
    'double': false,
    
    /**
     * APIProperty: pixelTolerance
     * {Number} Maximum number of pixels between mouseup and mousedown for an
     *     event to be considered a click.  Default is 0.  If set to an
     *     integer value, clicks with a drag greater than the value will be
     *     ignored.  This property can only be set when the handler is
     *     constructed.
     */
    pixelTolerance: 0,
        
    /**
     * APIProperty: dblclickTolerance
     * {Number} Maximum distance in pixels between clicks for a sequence of 
     *     events to be considered a double click.  Default is 13.  If the
     *     distance between two clicks is greater than this value, a double-
     *     click will not be fired.
     */
    dblclickTolerance: 13,
        
    /**
     * APIProperty: stopSingle
     * {Boolean} Stop other listeners from being notified of clicks.  Default
     *     is false.  If true, any listeners registered before this one for 
     *     click or rightclick events will not be notified.
     */
    stopSingle: false,
    
    /**
     * APIProperty: stopDouble
     * {Boolean} Stop other listeners from being notified of double-clicks.
     *     Default is false.  If true, any click listeners registered before
     *     this one will not be notified of *any* double-click events.
     * 
     * The one caveat with stopDouble is that given a map with two click
     *     handlers, one with stopDouble true and the other with stopSingle
     *     true, the stopSingle handler should be activated last to get
     *     uniform cross-browser performance.  Since IE triggers one click
     *     with a dblclick and FF triggers two, if a stopSingle handler is
     *     activated first, all it gets in IE is a single click when the
     *     second handler stops propagation on the dblclick.
     */
    stopDouble: false,

    /**
     * Property: timerId
     * {Number} The id of the timeout waiting to clear the <delayedCall>.
     */
    timerId: null,

    /**
     * Property: touch
     * {Boolean} When a touchstart event is fired, touch will be true and all
     *     mouse related listeners will do nothing.
     */
    touch: false,
    
    /**
     * Property: down
     * {Object} Object that store relevant information about the last
     *     mousedown or touchstart. Its 'xy' OpenLayers.Pixel property gives
     *     the average location of the mouse/touch event. Its 'touches'
     *     property records clientX/clientY of each touches.
     */
    down: null,

    /**
     * Property: last
     * {Object} Object that store relevant information about the last
     *     mousemove or touchmove. Its 'xy' OpenLayers.Pixel property gives
     *     the average location of the mouse/touch event. Its 'touches'
     *     property records clientX/clientY of each touches.
     */
    last: null,

    /** 
     * Property: first
     * {Object} When waiting for double clicks, this object will store 
     *     information about the first click in a two click sequence.
     */
    first: null,

    /**
     * Property: rightclickTimerId
     * {Number} The id of the right mouse timeout waiting to clear the 
     *     <delayedEvent>.
     */
    rightclickTimerId: null,
    
    /**
     * Constructor: OpenLayers.Handler.Click
     * Create a new click handler.
     * 
     * Parameters:
     * control - {<OpenLayers.Control>} The control that is making use of
     *     this handler.  If a handler is being used without a control, the
     *     handler's setMap method must be overridden to deal properly with
     *     the map.
     * callbacks - {Object} An object with keys corresponding to callbacks
     *     that will be called by the handler. The callbacks should
     *     expect to recieve a single argument, the click event.
     *     Callbacks for 'click' and 'dblclick' are supported.
     * options - {Object} Optional object whose properties will be set on the
     *     handler.
     */
    
    /**
     * Method: touchstart
     * Handle touchstart.
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    touchstart: function(evt) {
        if (!this.touch) {
            this.unregisterMouseListeners();
            this.touch = true;
        }
        this.down = this.getEventInfo(evt);
        this.last = this.getEventInfo(evt);
        return true;
    },
    
    /**
     * Method: touchmove
     *    Store position of last move, because touchend event can have
     *    an empty "touches" property.
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    touchmove: function(evt) {
        this.last = this.getEventInfo(evt);
        return true;
    },

    /**
     * Method: touchend
     *   Correctly set event xy property, and add lastTouches to have
     *   touches property from last touchstart or touchmove
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    touchend: function(evt) {
        // touchstart may not have been allowed to propagate
        if (this.down) {
            evt.xy = this.last.xy;
            evt.lastTouches = this.last.touches;
            this.handleSingle(evt);
            this.down = null;
        }
        return true;
    },
    
    /**
     * Method: unregisterMouseListeners
     * In a touch environment, we don't want to handle mouse events.
     */
    unregisterMouseListeners: function() {
        this.map.events.un({
            mousedown: this.mousedown,
            mouseup: this.mouseup,
            click: this.click,
            dblclick: this.dblclick,
            scope: this
        });
    },

    /**
     * Method: mousedown
     * Handle mousedown.
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    mousedown: function(evt) {
        this.down = this.getEventInfo(evt);
        this.last = this.getEventInfo(evt);
        return true;
    },

    /**
     * Method: mouseup
     * Handle mouseup.  Installed to support collection of right mouse events.
     * 
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    mouseup: function (evt) {
        var propagate = true;

        // Collect right mouse clicks from the mouseup
        //  IE - ignores the second right click in mousedown so using
        //  mouseup instead
        if (this.checkModifiers(evt) && this.control.handleRightClicks &&
           OpenLayers.Event.isRightClick(evt)) {
            propagate = this.rightclick(evt);
        }

        return propagate;
    },
    
    /**
     * Method: rightclick
     * Handle rightclick.  For a dblrightclick, we get two clicks so we need 
     *     to always register for dblrightclick to properly handle single 
     *     clicks.
     *     
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    rightclick: function(evt) {
        if(this.passesTolerance(evt)) {
           if(this.rightclickTimerId != null) {
                //Second click received before timeout this must be 
                // a double click
                this.clearTimer();
                this.callback('dblrightclick', [evt]);
                return !this.stopDouble;
            } else { 
                //Set the rightclickTimerId, send evt only if double is 
                // true else trigger single
                var clickEvent = this['double'] ?
                    OpenLayers.Util.extend({}, evt) : 
                    this.callback('rightclick', [evt]);

                var delayedRightCall = OpenLayers.Function.bind(
                    this.delayedRightCall, 
                    this, 
                    clickEvent
                );
                this.rightclickTimerId = window.setTimeout(
                    delayedRightCall, this.delay
                );
            } 
        }
        return !this.stopSingle;
    },
    
    /**
     * Method: delayedRightCall
     * Sets <rightclickTimerId> to null.  And optionally triggers the 
     *     rightclick callback if evt is set.
     */
    delayedRightCall: function(evt) {
        this.rightclickTimerId = null;
        if (evt) {
           this.callback('rightclick', [evt]);
        }
    },
    
    /**
     * Method: click
     * Handle click events from the browser.  This is registered as a listener
     *     for click events and should not be called from other events in this
     *     handler.
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    click: function(evt) {
        if (!this.last) {
            this.last = this.getEventInfo(evt);
        }
        this.handleSingle(evt);
        return !this.stopSingle;
    },

    /**
     * Method: dblclick
     * Handle dblclick.  For a dblclick, we get two clicks in some browsers
     *     (FF) and one in others (IE).  So we need to always register for
     *     dblclick to properly handle single clicks.  This method is registered
     *     as a listener for the dblclick browser event.  It should *not* be
     *     called by other methods in this handler.
     *     
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    dblclick: function(evt) {
        this.handleDouble(evt);
        return !this.stopDouble;
    },
    
    /** 
     * Method: handleDouble
     * Handle double-click sequence.
     */
    handleDouble: function(evt) {
        if (this.passesDblclickTolerance(evt)) {
            if (this["double"]) {
                this.callback("dblclick", [evt]);
            }
            // to prevent a dblclick from firing the click callback in IE
            this.clearTimer();
        }
    },
    
    /** 
     * Method: handleSingle
     * Handle single click sequence.
     */
    handleSingle: function(evt) {
        if (this.passesTolerance(evt)) {
            if (this.timerId != null) {
                // already received a click
                if (this.last.touches && this.last.touches.length === 1) {
                    // touch device, no dblclick event - this may be a double
                    if (this["double"]) {
                        // on Android don't let the browser zoom on the page
                        OpenLayers.Event.stop(evt);
                    }
                    this.handleDouble(evt);
                }
                // if we're not in a touch environment we clear the click timer
                // if we've got a second touch, we'll get two touchend events
                if (!this.last.touches || this.last.touches.length !== 2) {
                    this.clearTimer();
                }
            } else {
                // remember the first click info so we can compare to the second
                this.first = this.getEventInfo(evt);
                // set the timer, send evt only if single is true
                //use a clone of the event object because it will no longer 
                //be a valid event object in IE in the timer callback
                var clickEvent = this.single ?
                    OpenLayers.Util.extend({}, evt) : null;
                this.queuePotentialClick(clickEvent);
            }
        }
    },
    
    /** 
     * Method: queuePotentialClick
     * This method is separated out largely to make testing easier (so we
     *     don't have to override window.setTimeout)
     */
    queuePotentialClick: function(evt) {
        this.timerId = window.setTimeout(
            OpenLayers.Function.bind(this.delayedCall, this, evt),
            this.delay
        );
    },

    /**
     * Method: passesTolerance
     * Determine whether the event is within the optional pixel tolerance.  Note
     *     that the pixel tolerance check only works if mousedown events get to
     *     the listeners registered here.  If they are stopped by other elements,
     *     the <pixelTolerance> will have no effect here (this method will always
     *     return true).
     *
     * Returns:
     * {Boolean} The click is within the pixel tolerance (if specified).
     */
    passesTolerance: function(evt) {
        var passes = true;
        if (this.pixelTolerance != null && this.down && this.down.xy) {
            passes = this.pixelTolerance >= this.down.xy.distanceTo(evt.xy);
            // for touch environments, we also enforce that all touches
            // start and end within the given tolerance to be considered a click
            if (passes && this.touch && 
                this.down.touches.length === this.last.touches.length) {
                // the touchend event doesn't come with touches, so we check
                // down and last
                for (var i=0, ii=this.down.touches.length; i<ii; ++i) {
                    if (this.getTouchDistance(
                            this.down.touches[i], 
                            this.last.touches[i]
                        ) > this.pixelTolerance) {
                        passes = false;
                        break;
                    }
                }
            }
        }
        return passes;
    },
    
    /** 
     * Method: getTouchDistance
     *
     * Returns:
     * {Boolean} The pixel displacement between two touches.
     */
    getTouchDistance: function(from, to) {
        return Math.sqrt(
            Math.pow(from.clientX - to.clientX, 2) +
            Math.pow(from.clientY - to.clientY, 2)
        );
    },
    
    /**
     * Method: passesDblclickTolerance
     * Determine whether the event is within the optional double-cick pixel 
     *     tolerance.
     *
     * Returns:
     * {Boolean} The click is within the double-click pixel tolerance.
     */
    passesDblclickTolerance: function(evt) {
        var passes = true;
        if (this.down && this.first) {
            passes = this.down.xy.distanceTo(this.first.xy) <= this.dblclickTolerance;
        }
        return passes;
    },

    /**
     * Method: clearTimer
     * Clear the timer and set <timerId> to null.
     */
    clearTimer: function() {
        if (this.timerId != null) {
            window.clearTimeout(this.timerId);
            this.timerId = null;
        }
        if (this.rightclickTimerId != null) {
            window.clearTimeout(this.rightclickTimerId);
            this.rightclickTimerId = null;
        }
    },
    
    /**
     * Method: delayedCall
     * Sets <timerId> to null.  And optionally triggers the click callback if
     *     evt is set.
     */
    delayedCall: function(evt) {
        this.timerId = null;
        if (evt) {
            this.callback("click", [evt]);
        }
    },

    /**
     * Method: getEventInfo
     * This method allows us to store event information without storing the
     *     actual event.  In touch devices (at least), the same event is 
     *     modified between touchstart, touchmove, and touchend.
     *
     * Returns:
     * {Object} An object with event related info.
     */
    getEventInfo: function(evt) {
        var touches;
        if (evt.touches) {
            var len = evt.touches.length;
            touches = new Array(len);
            var touch;
            for (var i=0; i<len; i++) {
                touch = evt.touches[i];
                touches[i] = {
                    clientX: touch.clientX,
                    clientY: touch.clientY
                };
            }
        }
        return {
            xy: evt.xy,
            touches: touches
        };
    },

    /**
     * APIMethod: deactivate
     * Deactivate the handler.
     *
     * Returns:
     * {Boolean} The handler was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = false;
        if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            this.clearTimer();
            this.down = null;
            this.first = null;
            this.last = null;
            this.touch = false;
            deactivated = true;
        }
        return deactivated;
    },

    CLASS_NAME: "OpenLayers.Handler.Click"
});
/* ======================================================================
    OpenLayers/Control/Navigation.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/ZoomBox.js
 * @requires OpenLayers/Control/DragPan.js
 * @requires OpenLayers/Handler/MouseWheel.js
 * @requires OpenLayers/Handler/Click.js
 */

/**
 * Class: OpenLayers.Control.Navigation
 * The navigation control handles map browsing with mouse events (dragging,
 *     double-clicking, and scrolling the wheel).  Create a new navigation 
 *     control with the <OpenLayers.Control.Navigation> control.  
 * 
 *     Note that this control is added to the map by default (if no controls 
 *     array is sent in the options object to the <OpenLayers.Map> 
 *     constructor).
 * 
 * Inherits:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * Property: dragPan
     * {<OpenLayers.Control.DragPan>} 
     */
    dragPan: null,

    /**
     * APIProperty: dragPanOptions
     * {Object} Options passed to the DragPan control.
     */
    dragPanOptions: null,

    /**
     * Property: pinchZoom
     * {<OpenLayers.Control.PinchZoom>}
     */
    pinchZoom: null,

    /**
     * APIProperty: pinchZoomOptions
     * {Object} Options passed to the PinchZoom control.
     */
    pinchZoomOptions: null,

    /**
     * APIProperty: documentDrag
     * {Boolean} Allow panning of the map by dragging outside map viewport.
     *     Default is false.
     */
    documentDrag: false,

    /** 
     * Property: zoomBox
     * {<OpenLayers.Control.ZoomBox>}
     */
    zoomBox: null,

    /**
     * APIProperty: zoomBoxEnabled
     * {Boolean} Whether the user can draw a box to zoom
     */
    zoomBoxEnabled: true, 

    /**
     * APIProperty: zoomWheelEnabled
     * {Boolean} Whether the mousewheel should zoom the map
     */
    zoomWheelEnabled: true,
    
    /**
     * Property: mouseWheelOptions
     * {Object} Options passed to the MouseWheel control (only useful if
     *     <zoomWheelEnabled> is set to true)
     */
    mouseWheelOptions: null,

    /**
     * APIProperty: handleRightClicks
     * {Boolean} Whether or not to handle right clicks. Default is false.
     */
    handleRightClicks: false,

    /**
     * APIProperty: zoomBoxKeyMask
     * {Integer} <OpenLayers.Handler> key code of the key, which has to be
     *    pressed, while drawing the zoom box with the mouse on the screen. 
     *    You should probably set handleRightClicks to true if you use this
     *    with MOD_CTRL, to disable the context menu for machines which use
     *    CTRL-Click as a right click.
     * Default: <OpenLayers.Handler.MOD_SHIFT>
     */
    zoomBoxKeyMask: OpenLayers.Handler.MOD_SHIFT,
    
    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /**
     * Constructor: OpenLayers.Control.Navigation
     * Create a new navigation control
     * 
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *                    the control
     */
    initialize: function(options) {
        this.handlers = {};
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
    },

    /**
     * Method: destroy
     * The destroy method is used to perform any clean up before the control
     * is dereferenced.  Typically this is where event listeners are removed
     * to prevent memory leaks.
     */
    destroy: function() {
        this.deactivate();

        if (this.dragPan) {
            this.dragPan.destroy();
        }
        this.dragPan = null;

        if (this.zoomBox) {
            this.zoomBox.destroy();
        }
        this.zoomBox = null;

        if (this.pinchZoom) {
            this.pinchZoom.destroy();
        }
        this.pinchZoom = null;

        OpenLayers.Control.prototype.destroy.apply(this,arguments);
    },
    
    /**
     * Method: activate
     */
    activate: function() {
        this.dragPan.activate();
        if (this.zoomWheelEnabled) {
            this.handlers.wheel.activate();
        }    
        this.handlers.click.activate();
        if (this.zoomBoxEnabled) {
            this.zoomBox.activate();
        }
        if (this.pinchZoom) {
            this.pinchZoom.activate();
        }
        return OpenLayers.Control.prototype.activate.apply(this,arguments);
    },

    /**
     * Method: deactivate
     */
    deactivate: function() {
        if (this.pinchZoom) {
            this.pinchZoom.deactivate();
        }
        this.zoomBox.deactivate();
        this.dragPan.deactivate();
        this.handlers.click.deactivate();
        this.handlers.wheel.deactivate();
        return OpenLayers.Control.prototype.deactivate.apply(this,arguments);
    },
    
    /**
     * Method: draw
     */
    draw: function() {
        // disable right mouse context menu for support of right click events
        if (this.handleRightClicks) {
            this.map.viewPortDiv.oncontextmenu = OpenLayers.Function.False;
        }

        var clickCallbacks = { 
            'click': this.defaultClick,
            'dblclick': this.defaultDblClick, 
            'dblrightclick': this.defaultDblRightClick 
        };
        var clickOptions = {
            'double': true, 
            'stopDouble': true
        };
        this.handlers.click = new OpenLayers.Handler.Click(
            this, clickCallbacks, clickOptions
        );
        this.dragPan = new OpenLayers.Control.DragPan(
            OpenLayers.Util.extend({
                map: this.map,
                documentDrag: this.documentDrag
            }, this.dragPanOptions)
        );
        this.zoomBox = new OpenLayers.Control.ZoomBox(
                    {map: this.map, keyMask: this.zoomBoxKeyMask});
        this.dragPan.draw();
        this.zoomBox.draw();
        this.handlers.wheel = new OpenLayers.Handler.MouseWheel(
                                    this, {"up"  : this.wheelUp,
                                           "down": this.wheelDown},
                                    this.mouseWheelOptions );
        if (OpenLayers.Control.PinchZoom) {
            this.pinchZoom = new OpenLayers.Control.PinchZoom(
                OpenLayers.Util.extend(
                    {map: this.map}, this.pinchZoomOptions));
        }
    },

    /**
     * Method: defaultClick
     *
     * Parameters:
     * evt - {Event}
     */
    defaultClick: function (evt) {
        if (evt.lastTouches && evt.lastTouches.length == 2) {
            this.map.zoomOut();
        }
    },

    /**
     * Method: defaultDblClick 
     * 
     * Parameters:
     * evt - {Event} 
     */
    defaultDblClick: function (evt) {
        var newCenter = this.map.getLonLatFromViewPortPx( evt.xy ); 
        this.map.setCenter(newCenter, this.map.zoom + 1);
    },

    /**
     * Method: defaultDblRightClick 
     * 
     * Parameters:
     * evt - {Event} 
     */
    defaultDblRightClick: function (evt) {
        var newCenter = this.map.getLonLatFromViewPortPx( evt.xy ); 
        this.map.setCenter(newCenter, this.map.zoom - 1);
    },
    
    /**
     * Method: wheelChange  
     *
     * Parameters:
     * evt - {Event}
     * deltaZ - {Integer}
     */
    wheelChange: function(evt, deltaZ) {
        var currentZoom = this.map.getZoom();
        var newZoom = this.map.getZoom() + Math.round(deltaZ);
        newZoom = Math.max(newZoom, 0);
        newZoom = Math.min(newZoom, this.map.getNumZoomLevels());
        if (newZoom === currentZoom) {
            return;
        }
        var size    = this.map.getSize();
        var deltaX  = size.w/2 - evt.xy.x;
        var deltaY  = evt.xy.y - size.h/2;
        var newRes  = this.map.baseLayer.getResolutionForZoom(newZoom);
        var zoomPoint = this.map.getLonLatFromPixel(evt.xy);
        var newCenter = new OpenLayers.LonLat(
                            zoomPoint.lon + deltaX * newRes,
                            zoomPoint.lat + deltaY * newRes );
        this.map.setCenter( newCenter, newZoom );
    },

    /** 
     * Method: wheelUp
     * User spun scroll wheel up
     * 
     * Parameters:
     * evt - {Event}
     * delta - {Integer}
     */
    wheelUp: function(evt, delta) {
        this.wheelChange(evt, delta || 1);
    },

    /** 
     * Method: wheelDown
     * User spun scroll wheel down
     * 
     * Parameters:
     * evt - {Event}
     * delta - {Integer}
     */
    wheelDown: function(evt, delta) {
        this.wheelChange(evt, delta || -1);
    },
    
    /**
     * Method: disableZoomBox
     */
    disableZoomBox : function() {
        this.zoomBoxEnabled = false;
        this.zoomBox.deactivate();       
    },
    
    /**
     * Method: enableZoomBox
     */
    enableZoomBox : function() {
        this.zoomBoxEnabled = true;
        if (this.active) {
            this.zoomBox.activate();
        }    
    },
    
    /**
     * Method: disableZoomWheel
     */
    
    disableZoomWheel : function() {
        this.zoomWheelEnabled = false;
        this.handlers.wheel.deactivate();       
    },
    
    /**
     * Method: enableZoomWheel
     */
    
    enableZoomWheel : function() {
        this.zoomWheelEnabled = true;
        if (this.active) {
            this.handlers.wheel.activate();
        }    
    },

    CLASS_NAME: "OpenLayers.Control.Navigation"
});
/* ======================================================================
    OpenLayers/Control/DrawFeature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Feature/Vector.js
 */

/**
 * Class: OpenLayers.Control.DrawFeature
 * The DrawFeature control draws point, line or polygon features on a vector
 * layer when active.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.DrawFeature = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>}
     */
    layer: null,

    /**
     * Property: callbacks
     * {Object} The functions that are sent to the handler for callback
     */
    callbacks: null,
    
    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * featureadded - Triggered when a feature is added
     */
    
    /**
     * APIProperty: multi
     * {Boolean} Cast features to multi-part geometries before passing to the
     *     layer.  Default is false.
     */
    multi: false,

    /**
     * APIProperty: featureAdded
     * {Function} Called after each feature is added
     */
    featureAdded: function() {},

    /**
     * APIProperty: handlerOptions
     * {Object} Used to set non-default properties on the control's handler
     */
    handlerOptions: null,
    
    /**
     * Constructor: OpenLayers.Control.DrawFeature
     * 
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} 
     * handler - {<OpenLayers.Handler>} 
     * options - {Object} 
     */
    initialize: function(layer, handler, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.callbacks = OpenLayers.Util.extend(
            {
                done: this.drawFeature,
                modify: function(vertex, feature) {
                    this.layer.events.triggerEvent(
                        "sketchmodified", {vertex: vertex, feature: feature}
                    );
                },
                create: function(vertex, feature) {
                    this.layer.events.triggerEvent(
                        "sketchstarted", {vertex: vertex, feature: feature}
                    );
                }
            },
            this.callbacks
        );
        this.layer = layer;
        this.handlerOptions = this.handlerOptions || {};
        this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
            this.handlerOptions.layerOptions, {
                renderers: layer.renderers, rendererOptions: layer.rendererOptions
            }
        );
        if (!("multi" in this.handlerOptions)) {
            this.handlerOptions.multi = this.multi;
        }
        var sketchStyle = this.layer.styleMap && this.layer.styleMap.styles.temporary;
        if(sketchStyle) {
            this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
                this.handlerOptions.layerOptions,
                {styleMap: new OpenLayers.StyleMap({"default": sketchStyle})}
            );
        }
        this.handler = new handler(this, this.callbacks, this.handlerOptions);
    },

    /**
     * Method: drawFeature
     */
    drawFeature: function(geometry) {
        var feature = new OpenLayers.Feature.Vector(geometry);
        var proceed = this.layer.events.triggerEvent(
            "sketchcomplete", {feature: feature}
        );
        if(proceed !== false) {
            feature.state = OpenLayers.State.INSERT;
            this.layer.addFeatures([feature]);
            this.featureAdded(feature);
            this.events.triggerEvent("featureadded",{feature : feature});
        }
    },
    
    /**
     * APIMethod: insertXY
     * Insert a point in the current sketch given x & y coordinates.
     *
     * Parameters:
     * x - {Number} The x-coordinate of the point.
     * y - {Number} The y-coordinate of the point.
     */
    insertXY: function(x, y) {
        if (this.handler && this.handler.line) {
            this.handler.insertXY(x, y);
        }
    },

    /**
     * APIMethod: insertDeltaXY
     * Insert a point given offsets from the previously inserted point.
     *
     * Parameters:
     * dx - {Number} The x-coordinate offset of the point.
     * dy - {Number} The y-coordinate offset of the point.
     */
    insertDeltaXY: function(dx, dy) {
        if (this.handler && this.handler.line) {
            this.handler.insertDeltaXY(dx, dy);
        }
    },

    /**
     * APIMethod: insertDirectionLength
     * Insert a point in the current sketch given a direction and a length.
     *
     * Parameters:
     * direction - {Number} Degrees clockwise from the positive x-axis.
     * length - {Number} Distance from the previously drawn point.
     */
    insertDirectionLength: function(direction, length) {
        if (this.handler && this.handler.line) {
            this.handler.insertDirectionLength(direction, length);
        }
    },

    /**
     * APIMethod: insertDeflectionLength
     * Insert a point in the current sketch given a deflection and a length.
     *     The deflection should be degrees clockwise from the previously 
     *     digitized segment.
     *
     * Parameters:
     * deflection - {Number} Degrees clockwise from the previous segment.
     * length - {Number} Distance from the previously drawn point.
     */
    insertDeflectionLength: function(deflection, length) {
        if (this.handler && this.handler.line) {
            this.handler.insertDeflectionLength(deflection, length);
        }
    },
    
    /**
     * APIMethod: undo
     * Remove the most recently added point in the current sketch geometry.
     *
     * Returns: 
     * {Boolean} An edit was undone.
     */
    undo: function() {
        return this.handler.undo && this.handler.undo();
    },
    
    /**
     * APIMethod: redo
     * Reinsert the most recently removed point resulting from an <undo> call.
     *     The undo stack is deleted whenever a point is added by other means.
     *
     * Returns: 
     * {Boolean} An edit was redone.
     */
    redo: function() {
        return this.handler.redo && this.handler.redo();
    },
    
    /**
     * APIMethod: finishSketch
     * Finishes the sketch without including the currently drawn point.
     *     This method can be called to terminate drawing programmatically
     *     instead of waiting for the user to end the sketch.
     */
    finishSketch: function() {
        this.handler.finishGeometry();
    },

    /**
     * APIMethod: cancel
     * Cancel the current sketch.  This removes the current sketch and keeps
     *     the drawing control active.
     */
    cancel: function() {
        this.handler.cancel();
    },

    CLASS_NAME: "OpenLayers.Control.DrawFeature"
});
/* ======================================================================
    OpenLayers/Handler/Polygon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler/Path.js
 * @requires OpenLayers/Geometry/Polygon.js
 */

/**
 * Class: OpenLayers.Handler.Polygon
 * Handler to draw a polygon on the map.  Polygon is displayed on mouse down,
 * moves on mouse move, and is finished on mouse up.
 *
 * Inherits from:
 *  - <OpenLayers.Handler.Path>
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
    
    /** 
     * APIProperty: holeModifier
     * {String} Key modifier to trigger hole digitizing.  Acceptable values are
     *     "altKey", "shiftKey", or "ctrlKey".  If not set, no hole digitizing
     *     will take place.  Default is null.
     */
    holeModifier: null,
    
    /**
     * Property: drawingHole
     * {Boolean} Currently drawing an interior ring.
     */
    drawingHole: false,
    
    /**
     * Property: polygon
     * {<OpenLayers.Feature.Vector>}
     */
    polygon: null,

    /**
     * Constructor: OpenLayers.Handler.Polygon
     * Create a Polygon Handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that owns this handler
     * callbacks - {Object} An object with a properties whose values are
     *     functions.  Various callbacks described below.
     * options - {Object} An optional object with properties to be set on the
     *           handler
     *
     * Named callbacks:
     * create - Called when a sketch is first created.  Callback called with
     *     the creation point geometry and sketch feature.
     * modify - Called with each move of a vertex with the vertex (point)
     *     geometry and the sketch feature.
     * point - Called as each point is added.  Receives the new point geometry.
     * done - Called when the point drawing is finished.  The callback will
     *     recieve a single argument, the polygon geometry.
     * cancel - Called when the handler is deactivated while drawing.  The
     *     cancel callback will receive a geometry.
     */
    
    /**
     * Method: createFeature
     * Add temporary geometries
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} The initial pixel location for the new
     *     feature.
     */
    createFeature: function(pixel) {
        var lonlat = this.layer.getLonLatFromViewPortPx(pixel);
        var geometry = new OpenLayers.Geometry.Point(
            lonlat.lon, lonlat.lat
        );
        this.point = new OpenLayers.Feature.Vector(geometry);
        this.line = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.LinearRing([this.point.geometry])
        );
        this.polygon = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Polygon([this.line.geometry])
        );
        this.callback("create", [this.point.geometry, this.getSketch()]);
        this.point.geometry.clearBounds();
        this.layer.addFeatures([this.polygon, this.point], {silent: true});
    },

    /**
     * Method: addPoint
     * Add point to geometry.
     *
     * Parameters:
     * pixel - {<OpenLayers.Pixel>} The pixel location for the new point.
     */
    addPoint: function(pixel) {
        if(!this.drawingHole && this.holeModifier &&
           this.evt && this.evt[this.holeModifier]) {
            var geometry = this.point.geometry;
            var features = this.control.layer.features;
            var candidate, polygon;
            // look for intersections, last drawn gets priority
            for (var i=features.length-1; i>=0; --i) {
                candidate = features[i].geometry;
                if ((candidate instanceof OpenLayers.Geometry.Polygon || 
                    candidate instanceof OpenLayers.Geometry.MultiPolygon) && 
                    candidate.intersects(geometry)) {
                    polygon = features[i];
                    this.control.layer.removeFeatures([polygon], {silent: true});
                    this.control.layer.events.registerPriority(
                        "sketchcomplete", this, this.finalizeInteriorRing
                    );
                    this.control.layer.events.registerPriority(
                        "sketchmodified", this, this.enforceTopology
                    );
                    polygon.geometry.addComponent(this.line.geometry);
                    this.polygon = polygon;
                    this.drawingHole = true;
                    break;
                }
            }
        }
        OpenLayers.Handler.Path.prototype.addPoint.apply(this, arguments);
    },

    /**
     * Method: getCurrentPointIndex
     * 
     * Returns:
     * {Number} The index of the most recently drawn point.
     */
    getCurrentPointIndex: function() {
        return this.line.geometry.components.length - 2;
    },

    /**
     * Method: enforceTopology
     * Simple topology enforcement for drawing interior rings.  Ensures vertices
     *     of interior rings are contained by exterior ring.  Other topology 
     *     rules are enforced in <finalizeInteriorRing> to allow drawing of 
     *     rings that intersect only during the sketch (e.g. a "C" shaped ring
     *     that nearly encloses another ring).
     */
    enforceTopology: function(event) {
        var point = event.vertex;
        var components = this.line.geometry.components;
        // ensure that vertices of interior ring are contained by exterior ring
        if (!this.polygon.geometry.intersects(point)) {
            var last = components[components.length-3];
            point.x = last.x;
            point.y = last.y;
        }
    },

    /**
     * Method: finishGeometry
     * Finish the geometry and send it back to the control.
     */
    finishGeometry: function() {
        var index = this.line.geometry.components.length - 2;
        this.line.geometry.removeComponent(this.line.geometry.components[index]);
        this.removePoint();
        this.finalize();
    },

    /**
     * Method: finalizeInteriorRing
     * Enforces that new ring has some area and doesn't contain vertices of any
     *     other rings.
     */
    finalizeInteriorRing: function() {
        var ring = this.line.geometry;
        // ensure that ring has some area
        var modified = (ring.getArea() !== 0);
        if (modified) {
            // ensure that new ring doesn't intersect any other rings
            var rings = this.polygon.geometry.components;
            for (var i=rings.length-2; i>=0; --i) {
                if (ring.intersects(rings[i])) {
                    modified = false;
                    break;
                }
            }
            if (modified) {
                // ensure that new ring doesn't contain any other rings
                var target;
                outer: for (var i=rings.length-2; i>0; --i) {
                    var points = rings[i].components;
                    for (var j=0, jj=points.length; j<jj; ++j) {
                        if (ring.containsPoint(points[j])) {
                            modified = false;
                            break outer;
                        }
                    }
                }
            }
        }
        if (modified) {
            if (this.polygon.state !== OpenLayers.State.INSERT) {
                this.polygon.state = OpenLayers.State.UPDATE;
            }
        } else {
            this.polygon.geometry.removeComponent(ring);
        }
        this.restoreFeature();
        return false;
    },

    /**
     * APIMethod: cancel
     * Finish the geometry and call the "cancel" callback.
     */
    cancel: function() {
        if (this.drawingHole) {
            this.polygon.geometry.removeComponent(this.line.geometry);
            this.restoreFeature(true);
        }
        return OpenLayers.Handler.Path.prototype.cancel.apply(this, arguments);
    },
    
    /**
     * Method: restoreFeature
     * Move the feature from the sketch layer to the target layer.
     *
     * Properties: 
     * cancel - {Boolean} Cancel drawing.  If falsey, the "sketchcomplete" event
     *     will be fired.
     */
    restoreFeature: function(cancel) {
        this.control.layer.events.unregister(
            "sketchcomplete", this, this.finalizeInteriorRing
        );
        this.control.layer.events.unregister(
            "sketchmodified", this, this.enforceTopology
        );
        this.layer.removeFeatures([this.polygon], {silent: true});
        this.control.layer.addFeatures([this.polygon], {silent: true});
        this.drawingHole = false;
        if (!cancel) {
            // Re-trigger "sketchcomplete" so other listeners can do their
            // business.  While this is somewhat sloppy (if a listener is 
            // registered with registerPriority - not common - between the start
            // and end of a single ring drawing - very uncommon - it will be 
            // called twice).
            // TODO: In 3.0, collapse sketch handlers into geometry specific
            // drawing controls.
            this.control.layer.events.triggerEvent(
                "sketchcomplete", {feature : this.polygon}
            );
        }
    },

    /**
     * Method: destroyFeature
     * Destroy temporary geometries
     *
     * Parameters:
     * force - {Boolean} Destroy even if persist is true.
     */
    destroyFeature: function(force) {
        OpenLayers.Handler.Path.prototype.destroyFeature.call(
            this, force);
        this.polygon = null;
    },

    /**
     * Method: drawFeature
     * Render geometries on the temporary layer.
     */
    drawFeature: function() {
        this.layer.drawFeature(this.polygon, this.style);
        this.layer.drawFeature(this.point, this.style);
    },
    
    /**
     * Method: getSketch
     * Return the sketch feature.
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>}
     */
    getSketch: function() {
        return this.polygon;
    },

    /**
     * Method: getGeometry
     * Return the sketch geometry.  If <multi> is true, this will return
     *     a multi-part geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.Polygon>}
     */
    getGeometry: function() {
        var geometry = this.polygon && this.polygon.geometry;
        if(geometry && this.multi) {
            geometry = new OpenLayers.Geometry.MultiPolygon([geometry]);
        }
        return geometry;
    },

    CLASS_NAME: "OpenLayers.Handler.Polygon"
});
/* ======================================================================
    OpenLayers/Control/EditingToolbar.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/Panel.js
 * @requires OpenLayers/Control/Navigation.js
 * @requires OpenLayers/Control/DrawFeature.js
 * @requires OpenLayers/Handler/Point.js
 * @requires OpenLayers/Handler/Path.js
 * @requires OpenLayers/Handler/Polygon.js
 */

/**
 * Class: OpenLayers.Control.EditingToolbar 
 * The EditingToolbar is a panel of 4 controls to draw polygons, lines, 
 * points, or to navigate the map by panning. By default it appears in the 
 * upper right corner of the map.
 * 
 * Inherits from:
 *  - <OpenLayers.Control.Panel>
 */
OpenLayers.Control.EditingToolbar = OpenLayers.Class(
  OpenLayers.Control.Panel, {

    /**
     * APIProperty: citeCompliant
     * {Boolean} If set to true, coordinates of features drawn in a map extent
     * crossing the date line won't exceed the world bounds. Default is false.
     */
    citeCompliant: false,

    /**
     * Constructor: OpenLayers.Control.EditingToolbar
     * Create an editing toolbar for a given layer. 
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>} 
     * options - {Object} 
     */
    initialize: function(layer, options) {
        OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);
        
        this.addControls(
          [ new OpenLayers.Control.Navigation() ]
        );  
        var controls = [
            new OpenLayers.Control.DrawFeature(layer, OpenLayers.Handler.Point, {
                displayClass: 'olControlDrawFeaturePoint',
                handlerOptions: {citeCompliant: this.citeCompliant}
            }),
            new OpenLayers.Control.DrawFeature(layer, OpenLayers.Handler.Path, {
                displayClass: 'olControlDrawFeaturePath',
                handlerOptions: {citeCompliant: this.citeCompliant}
            }),
            new OpenLayers.Control.DrawFeature(layer, OpenLayers.Handler.Polygon, {
                displayClass: 'olControlDrawFeaturePolygon',
                handlerOptions: {citeCompliant: this.citeCompliant}
            })
        ];
        this.addControls(controls);
    },

    /**
     * Method: draw
     * calls the default draw, and then activates mouse defaults.
     *
     * Returns:
     * {DOMElement}
     */
    draw: function() {
        var div = OpenLayers.Control.Panel.prototype.draw.apply(this, arguments);
        if (this.defaultControl === null) {
            this.defaultControl = this.controls[0];
        }
        return div;
    },

    CLASS_NAME: "OpenLayers.Control.EditingToolbar"
});    
/* ======================================================================
    OpenLayers/Strategy/BBOX.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 * @requires OpenLayers/Filter/Spatial.js
 */

/**
 * Class: OpenLayers.Strategy.BBOX
 * A simple strategy that reads new features when the viewport invalidates
 *     some bounds.
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.BBOX = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * Property: bounds
     * {<OpenLayers.Bounds>} The current data bounds (in the same projection
     *     as the layer - not always the same projection as the map).
     */
    bounds: null,
    
    /** 
     * Property: resolution 
     * {Float} The current data resolution. 
     */ 
    resolution: null, 
           
    /**
     * APIProperty: ratio
     * {Float} The ratio of the data bounds to the viewport bounds (in each
     *     dimension).  Default is 2.
     */
    ratio: 2,

    /** 
     * Property: resFactor 
     * {Float} Optional factor used to determine when previously requested 
     *     features are invalid.  If set, the resFactor will be compared to the
     *     resolution of the previous request to the current map resolution.
     *     If resFactor > (old / new) and 1/resFactor < (old / new).  If you
     *     set a resFactor of 1, data will be requested every time the
     *     resolution changes.  If you set a resFactor of 3, data will be
     *     requested if the old resolution is 3 times the new, or if the new is
     *     3 times the old.  If the old bounds do not contain the new bounds
     *     new data will always be requested (with or without considering
     *     resFactor). 
     */ 
    resFactor: null, 
    
    /**
     * Property: response
     * {<OpenLayers.Protocol.Response>} The protocol response object returned
     *      by the layer protocol.
     */
    response: null,

    /**
     * Constructor: OpenLayers.Strategy.BBOX
     * Create a new BBOX strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    
    /**
     * Method: activate
     * Set up strategy with regard to reading new batches of remote data.
     * 
     * Returns:
     * {Boolean} The strategy was successfully activated.
     */
    activate: function() {
        var activated = OpenLayers.Strategy.prototype.activate.call(this);
        if(activated) {
            this.layer.events.on({
                "moveend": this.update,
                "refresh": this.update,
                "visibilitychanged": this.update,
                scope: this
            });
            this.update();
        }
        return activated;
    },
    
    /**
     * Method: deactivate
     * Tear down strategy with regard to reading new batches of remote data.
     * 
     * Returns:
     * {Boolean} The strategy was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
        if(deactivated) {
            this.layer.events.un({
                "moveend": this.update,
                "refresh": this.update,
                "visibilitychanged": this.update,
                scope: this
            });
        }
        return deactivated;
    },

    /**
     * Method: update
     * Callback function called on "moveend" or "refresh" layer events.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will determine
     *     the behaviour of this Strategy
     *
     * Valid options include:
     * force - {Boolean} if true, new data must be unconditionally read.
     * noAbort - {Boolean} if true, do not abort previous requests.
     */
    update: function(options) {
        var mapBounds = this.getMapBounds();
        if (mapBounds !== null && ((options && options.force) ||
          (this.layer.visibility && this.layer.calculateInRange() && this.invalidBounds(mapBounds)))) {
            this.calculateBounds(mapBounds);
            this.resolution = this.layer.map.getResolution(); 
            this.triggerRead(options);
        }
    },
    
    /**
     * Method: getMapBounds
     * Get the map bounds expressed in the same projection as this layer.
     *
     * Returns:
     * {<OpenLayers.Bounds>} Map bounds in the projection of the layer.
     */
    getMapBounds: function() {
        if (this.layer.map === null) {
            return null;
        }
        var bounds = this.layer.map.getExtent();
        if(bounds && !this.layer.projection.equals(
                this.layer.map.getProjectionObject())) {
            bounds = bounds.clone().transform(
                this.layer.map.getProjectionObject(), this.layer.projection
            );
        }
        return bounds;
    },

    /**
     * Method: invalidBounds
     * Determine whether the previously requested set of features is invalid. 
     *     This occurs when the new map bounds do not contain the previously 
     *     requested bounds.  In addition, if <resFactor> is set, it will be 
     *     considered.
     *
     * Parameters:
     * mapBounds - {<OpenLayers.Bounds>} the current map extent, will be
     *      retrieved from the map object if not provided
     *
     * Returns:
     * {Boolean} 
     */
    invalidBounds: function(mapBounds) {
        if(!mapBounds) {
            mapBounds = this.getMapBounds();
        }
        var invalid = !this.bounds || !this.bounds.containsBounds(mapBounds);
        if(!invalid && this.resFactor) {
            var ratio = this.resolution / this.layer.map.getResolution();
            invalid = (ratio >= this.resFactor || ratio <= (1 / this.resFactor));
        }
        return invalid;
    },
 
    /**
     * Method: calculateBounds
     *
     * Parameters:
     * mapBounds - {<OpenLayers.Bounds>} the current map extent, will be
     *      retrieved from the map object if not provided
     */
    calculateBounds: function(mapBounds) {
        if(!mapBounds) {
            mapBounds = this.getMapBounds();
        }
        var center = mapBounds.getCenterLonLat();
        var dataWidth = mapBounds.getWidth() * this.ratio;
        var dataHeight = mapBounds.getHeight() * this.ratio;
        this.bounds = new OpenLayers.Bounds(
            center.lon - (dataWidth / 2),
            center.lat - (dataHeight / 2),
            center.lon + (dataWidth / 2),
            center.lat + (dataHeight / 2)
        );
    },
    
    /**
     * Method: triggerRead
     *
     * Parameters:
     * options - {Object} Additional options for the protocol's read method 
     *     (optional)
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} The protocol response object
     *      returned by the layer protocol.
     */
    triggerRead: function(options) {
        if (this.response && !(options && options.noAbort === true)) {
            this.layer.protocol.abort(this.response);
            this.layer.events.triggerEvent("loadend");
        }
        this.layer.events.triggerEvent("loadstart");
        this.response = this.layer.protocol.read(
            OpenLayers.Util.applyDefaults({
                filter: this.createFilter(),
                callback: this.merge,
                scope: this
        }, options));
    },
 
    /**
     * Method: createFilter
     * Creates a spatial BBOX filter. If the layer that this strategy belongs
     * to has a filter property, this filter will be combined with the BBOX 
     * filter.
     * 
     * Returns
     * {<OpenLayers.Filter>} The filter object.
     */
    createFilter: function() {
        var filter = new OpenLayers.Filter.Spatial({
            type: OpenLayers.Filter.Spatial.BBOX,
            value: this.bounds,
            projection: this.layer.projection
        });
        if (this.layer.filter) {
            filter = new OpenLayers.Filter.Logical({
                type: OpenLayers.Filter.Logical.AND,
                filters: [this.layer.filter, filter]
            });
        }
        return filter;
    },
   
    /**
     * Method: merge
     * Given a list of features, determine which ones to add to the layer.
     *     If the layer projection differs from the map projection, features
     *     will be transformed from the layer projection to the map projection.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>} The response object passed
     *      by the protocol.
     */
    merge: function(resp) {
        this.layer.destroyFeatures();
        var features = resp.features;
        if(features && features.length > 0) {
            var remote = this.layer.projection;
            var local = this.layer.map.getProjectionObject();
            if(!local.equals(remote)) {
                var geom;
                for(var i=0, len=features.length; i<len; ++i) {
                    geom = features[i].geometry;
                    if(geom) {
                        geom.transform(remote, local);
                    }
                }
            }
            this.layer.addFeatures(features);
        }
        this.response = null;
        this.layer.events.triggerEvent("loadend");
    },
   
    CLASS_NAME: "OpenLayers.Strategy.BBOX" 
});
/* ======================================================================
    OpenLayers/Layer/WorldWind.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.WorldWind
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.WorldWind = OpenLayers.Class(OpenLayers.Layer.Grid, {
    
    DEFAULT_PARAMS: {
    },

    /**
     * APIProperty: isBaseLayer
     * {Boolean} WorldWind layer is a base layer by default.
     */
    isBaseLayer: true,

    /** 
     * APIProperty: lzd
     * {Float} LevelZeroTileSizeDegrees
     */
    lzd: null,

    /**
     * APIProperty: zoomLevels
     * {Integer} Number of zoom levels.
     */
    zoomLevels: null,
    
    /**
     * Constructor: OpenLayers.Layer.WorldWind
     * 
     * Parameters:
     * name - {String} Name of Layer
     * url - {String} Base URL  
     * lzd - {Float} Level zero tile size degrees 
     * zoomLevels - {Integer} number of zoom levels
     * params - {Object} additional parameters
     * options - {Object} additional options
     */
    initialize: function(name, url, lzd, zoomLevels, params, options) {
        this.lzd = lzd;
        this.zoomLevels = zoomLevels;
        var newArguments = [];
        newArguments.push(name, url, params, options);
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
        this.params = OpenLayers.Util.applyDefaults(
            this.params, this.DEFAULT_PARAMS
        );
    },

    /**
     * Method: getZoom
     * Convert map zoom to WW zoom.
     */
    getZoom: function () {
        var zoom = this.map.getZoom();
        var extent = this.map.getMaxExtent();
        zoom = zoom - Math.log(this.maxResolution / (this.lzd/512))/Math.log(2);
        return zoom;
    },

    /**
     * Method: getURL
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     *
     * Returns:
     * {String} A string with the layer's url and parameters and also the 
     *           passed-in bounds and appropriate tile size specified as 
     *           parameters
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        var zoom = this.getZoom();
        var extent = this.map.getMaxExtent();
        var deg = this.lzd/Math.pow(2,this.getZoom());
        var x = Math.floor((bounds.left - extent.left)/deg);
        var y = Math.floor((bounds.bottom - extent.bottom)/deg);
        if (this.map.getResolution() <= (this.lzd/512)
            && this.getZoom() <= this.zoomLevels) {
            return this.getFullRequestString(
              { L: zoom, 
                X: x,
                Y: y
              });
        } else {
            return OpenLayers.Util.getImageLocation("blank.gif");
        }

    },

    CLASS_NAME: "OpenLayers.Layer.WorldWind"
});
/* ======================================================================
    OpenLayers/Protocol/CSW.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol.js
 */

/**
 * Class: OpenLayers.Protocol.CSW
 * Used to create a versioned CSW protocol. Default version is 2.0.2.
 */
OpenLayers.Protocol.CSW = function(options) {
    options = OpenLayers.Util.applyDefaults(
        options, OpenLayers.Protocol.CSW.DEFAULTS
    );
    var cls = OpenLayers.Protocol.CSW["v"+options.version.replace(/\./g, "_")];
    if(!cls) {
        throw "Unsupported CSW version: " + options.version;
    }
    return new cls(options);
};

/**
 * Constant: OpenLayers.Protocol.CSW.DEFAULTS
 */
OpenLayers.Protocol.CSW.DEFAULTS = {
    "version": "2.0.2"
};
/* ======================================================================
    OpenLayers/Format/WMTSCapabilities.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */
 
/**
 * Class: OpenLayers.Format.WMTSCapabilities
 * Read WMTS Capabilities.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.WMTSCapabilities = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.0.0".
     */
    defaultVersion: "1.0.0",
    
    /**
     * APIProperty: yx
     * {Object} Members in the yx object are used to determine if a CRS URN
     *     corresponds to a CRS with y,x axis order.  Member names are CRS URNs
     *     and values are boolean.  By default, the following CRS URN are 
     *     assumed to correspond to a CRS with y,x axis order:
     *
     * * urn:ogc:def:crs:EPSG::4326
     */
    yx: {
        "urn:ogc:def:crs:EPSG::4326": true
    },

    /**
     * Constructor: OpenLayers.Format.WMTSCapabilities
     * Create a new parser for WMTS capabilities.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return information about
     * the service (offering and observedProperty mostly).
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Info about the WMTS Capabilities
     */

    /**
     * APIMethod: createLayer
     * Create a WMTS layer given a capabilities object.
     *
     * Parameters:
     * capabilities - {Object} The object returned from a <read> call to this 
     *     format.
     * config - {Object} Configuration properties for the layer.  Defaults for
     *     the layer will apply if not provided.
     *
     * Required config properties:
     * layer - {String} The layer identifier.
     * matrixSet - {String} The matrix set identifier.
     *
     * Returns:
     * {<OpenLayers.Layer.WMTS>} A properly configured WMTS layer.  Throws an
     *     error if an incomplete config is provided.  Returns undefined if no
     *     layer could be created with the provided config.
     */ 
    createLayer: function(capabilities, config) {
        var layer;

        // confirm required properties are supplied in config
        var required = {
            layer: true,
            matrixSet: true
        };
        for (var prop in required) {
            if (!(prop in config)) {
                throw new Error("Missing property '" + prop + "' in layer configuration.");
            }
        }

        var contents = capabilities.contents;
        var matrixSet = contents.tileMatrixSets[config.matrixSet];

        // find the layer definition with the given identifier
        var layers = contents.layers;
        var layerDef;
        for (var i=0, ii=contents.layers.length; i<ii; ++i) {
            if (contents.layers[i].identifier === config.layer) {
                layerDef = contents.layers[i];
                break;
            }
        }
        
        if (layerDef && matrixSet) {
            // get the default style for the layer
            var style;
            for (var i=0, ii=layerDef.styles.length; i<ii; ++i) {
                style = layerDef.styles[i];
                if (style.isDefault) {
                    break;
                }
            }
            
            layer = new OpenLayers.Layer.WMTS(
                OpenLayers.Util.applyDefaults(config, {
                    url: config.requestEncoding === "REST" && layerDef.resourceUrl ?
                        layerDef.resourceUrl.tile.template :
                        capabilities.operationsMetadata.GetTile.dcp.http.get[0].url,
                    name: layerDef.title,
                    style: style.identifier,
                    matrixIds: matrixSet.matrixIds,
                    tileFullExtent: matrixSet.bounds
                })
            );
        }
        return layer;
    },
    
    CLASS_NAME: "OpenLayers.Format.WMTSCapabilities" 

});
/* ======================================================================
    OpenLayers/Layer/Google/v3.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Google.js
 */

/**
 * Constant: OpenLayers.Layer.Google.v3
 * 
 * Mixin providing functionality specific to the Google Maps API v3.
 * 
 * To use this layer, you must include the GMaps v3 API in your html.
 * 
 * Because OpenLayers needs to control mouse events, it isolates the GMaps mapObject
 * (the DOM elements provided by Google) using the EventPane.
 * However, because the Terms of Use require some of those elements,
 * such as the links to Google's terms, to be clickable, these elements have 
 * to be moved up to OpenLayers' container div. There is however no easy way
 * to identify these, and the logic (see the repositionMapElements function
 * in the source) may need to be changed if Google changes them.
 * These elements are not part of the published API and can be changed at any time,
 * so a given OpenLayers release can only guarantee support for the 'frozen'
 * Google release at the time of the OpenLayers release. See
 * https://developers.google.com/maps/documentation/javascript/basics#Versioning
 * for Google's current release cycle.
 * 
 * For this reason, it's recommended that production code specifically loads 
 * the current frozen version, for example:
 *
 * (code)
 * <script src="http://maps.google.com/maps/api/js?v=3.7&amp;sensor=false"></script>
 * (end)
 * 
 * but that development code should use the latest 'nightly' version, so that any
 * problems can be dealt with as soon as they arise, and before they affect the production, 'frozen', code.
 * 
 * Note, however, that frozen versions are retired as part of Google's release
 * cycle, and once this happens, you will get the next version, in the example above, 3.8 once 3.7 is retired.
 * 
 * This version supports 3.7.
 * 
 * 
 * Note that this layer configures the google.maps.map object with the
 * "disableDefaultUI" option set to true. Using UI controls that the Google
 * Maps API provides is not supported by the OpenLayers API.
 */
OpenLayers.Layer.Google.v3 = {
    
    /**
     * Constant: DEFAULTS
     * {Object} It is not recommended to change the properties set here. Note
     * that Google.v3 layers only work when sphericalMercator is set to true.
     * 
     * (code)
     * {
     *     sphericalMercator: true,
     *     projection: "EPSG:900913"
     * }
     * (end)
     */
    DEFAULTS: {
        sphericalMercator: true,
        projection: "EPSG:900913"
    },

    /**
     * APIProperty: animationEnabled
     * {Boolean} If set to true, the transition between zoom levels will be
     *     animated (if supported by the GMaps API for the device used). Set to
     *     false to match the zooming experience of other layer types. Default
     *     is true. Note that the GMaps API does not give us control over zoom
     *     animation, so if set to false, when zooming, this will make the
     *     layer temporarily invisible, wait until GMaps reports the map being
     *     idle, and make it visible again. The result will be a blank layer
     *     for a few moments while zooming.
     */
    animationEnabled: true, 

    /** 
     * Method: loadMapObject
     * Load the GMap and register appropriate event listeners. If we can't 
     *     load GMap2, then display a warning message.
     */
    loadMapObject:function() {
        if (!this.type) {
            this.type = google.maps.MapTypeId.ROADMAP;
        }
        var mapObject;
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            // there are already Google layers added to this map
            mapObject = cache.mapObject;
            // increment the layer count
            ++cache.count;
        } else {
            // this is the first Google layer for this map

            var container = this.map.viewPortDiv;
            var div = document.createElement("div");
            div.id = this.map.id + "_GMapContainer";
            div.style.position = "absolute";
            div.style.width = "100%";
            div.style.height = "100%";
            container.appendChild(div);

            // create GMap and shuffle elements
            var center = this.map.getCenter();
            mapObject = new google.maps.Map(div, {
                center: center ?
                    new google.maps.LatLng(center.lat, center.lon) :
                    new google.maps.LatLng(0, 0),
                zoom: this.map.getZoom() || 0,
                mapTypeId: this.type,
                disableDefaultUI: true,
                keyboardShortcuts: false,
                draggable: false,
                disableDoubleClickZoom: true,
                scrollwheel: false,
                streetViewControl: false
            });
            
            // cache elements for use by any other google layers added to
            // this same map
            cache = {
                mapObject: mapObject,
                count: 1
            };
            OpenLayers.Layer.Google.cache[this.map.id] = cache;
            this.repositionListener = google.maps.event.addListenerOnce(
                mapObject, 
                "center_changed", 
                OpenLayers.Function.bind(this.repositionMapElements, this)
            );
        }
        this.mapObject = mapObject;
        this.setGMapVisibility(this.visibility);
    },
    
    /**
     * Method: repositionMapElements
     *
     * Waits until powered by and terms of use elements are available and then
     * moves them so they are clickable.
     */
    repositionMapElements: function() {

        // This is the first time any Google layer in this mapObject has been
        // made visible.  The mapObject needs to know the container size.
        google.maps.event.trigger(this.mapObject, "resize");
        
        var div = this.mapObject.getDiv().firstChild;
        if (!div || div.childNodes.length < 3) {
            this.repositionTimer = window.setTimeout(
                OpenLayers.Function.bind(this.repositionMapElements, this),
                250
            );
            return false;
        }

        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        var container = this.map.viewPortDiv;
        
        // move the ToS and branding stuff up to the container div
        // depends on value of zIndex, which is not robust
        for (var i=div.children.length-1; i>=0; --i) {
            if (div.children[i].style.zIndex == 1000001) {
                var termsOfUse = div.children[i];
                container.appendChild(termsOfUse);
                termsOfUse.style.zIndex = "1100";
                termsOfUse.style.bottom = "";
                termsOfUse.className = "olLayerGoogleCopyright olLayerGoogleV3";
                termsOfUse.style.display = "";
                cache.termsOfUse = termsOfUse;
            }
            if (div.children[i].style.zIndex == 1000000) {
                var poweredBy = div.children[i];
                container.appendChild(poweredBy);
                poweredBy.style.zIndex = "1100";
                poweredBy.style.bottom = "";
                poweredBy.className = "olLayerGooglePoweredBy olLayerGoogleV3 gmnoprint";
                poweredBy.style.display = "";
                cache.poweredBy = poweredBy;
            }
            if (div.children[i].style.zIndex == 10000002) {
                container.appendChild(div.children[i]);
            }
        }

        this.setGMapVisibility(this.visibility);

    },

    /**
     * APIMethod: onMapResize
     */
    onMapResize: function() {
        if (this.visibility) {
            google.maps.event.trigger(this.mapObject, "resize");
        } else {
            var cache = OpenLayers.Layer.Google.cache[this.map.id];
            if (!cache.resized) {
                var layer = this;
                google.maps.event.addListenerOnce(this.mapObject, "tilesloaded", function() {
                    google.maps.event.trigger(layer.mapObject, "resize");
                    layer.moveTo(layer.map.getCenter(), layer.map.getZoom());
                    delete cache.resized;
                });
            }
            cache.resized = true;
        }
    },

    /**
     * Method: setGMapVisibility
     * Display the GMap container and associated elements.
     * 
     * Parameters:
     * visible - {Boolean} Display the GMap elements.
     */
    setGMapVisibility: function(visible) {
        var cache = OpenLayers.Layer.Google.cache[this.map.id];
        if (cache) {
            var type = this.type;
            var layers = this.map.layers;
            var layer;
            for (var i=layers.length-1; i>=0; --i) {
                layer = layers[i];
                if (layer instanceof OpenLayers.Layer.Google &&
                            layer.visibility === true && layer.inRange === true) {
                    type = layer.type;
                    visible = true;
                    break;
                }
            }
            var container = this.mapObject.getDiv();
            if (visible === true) {
                this.mapObject.setMapTypeId(type);                
                container.style.left = "";
                if (cache.termsOfUse && cache.termsOfUse.style) {
                    cache.termsOfUse.style.left = "";
                    cache.termsOfUse.style.display = "";
                    cache.poweredBy.style.display = "";            
                }
                cache.displayed = this.id;
            } else {
                delete cache.displayed;
                container.style.left = "-9999px";
                if (cache.termsOfUse && cache.termsOfUse.style) {
                    cache.termsOfUse.style.display = "none";
                    // move ToU far to the left in addition to setting
                    // display to "none", because at the end of the GMap
                    // load sequence, display: none will be unset and ToU
                    // would be visible after loading a map with a google
                    // layer that is initially hidden. 
                    cache.termsOfUse.style.left = "-9999px";
                    cache.poweredBy.style.display = "none";
                }
            }
        }
    },
    
    /**
     * Method: getMapContainer
     * 
     * Returns:
     * {DOMElement} the GMap container's div
     */
    getMapContainer: function() {
        return this.mapObject.getDiv();
    },
    
  //
  // TRANSLATION: MapObject Bounds <-> OpenLayers.Bounds
  //

    /**
     * APIMethod: getMapObjectBoundsFromOLBounds
     * 
     * Parameters:
     * olBounds - {<OpenLayers.Bounds>}
     * 
     * Returns:
     * {Object} A MapObject Bounds, translated from olBounds
     *          Returns null if null value is passed in
     */
    getMapObjectBoundsFromOLBounds: function(olBounds) {
        var moBounds = null;
        if (olBounds != null) {
            var sw = this.sphericalMercator ? 
              this.inverseMercator(olBounds.bottom, olBounds.left) : 
              new OpenLayers.LonLat(olBounds.bottom, olBounds.left);
            var ne = this.sphericalMercator ? 
              this.inverseMercator(olBounds.top, olBounds.right) : 
              new OpenLayers.LonLat(olBounds.top, olBounds.right);
            moBounds = new google.maps.LatLngBounds(
                new google.maps.LatLng(sw.lat, sw.lon),
                new google.maps.LatLng(ne.lat, ne.lon)
            );
        }
        return moBounds;
    },


    /************************************
     *                                  *
     *   MapObject Interface Controls   *
     *                                  *
     ************************************/


  // LonLat - Pixel Translation
  
    /**
     * APIMethod: getMapObjectLonLatFromMapObjectPixel
     * 
     * Parameters:
     * moPixel - {Object} MapObject Pixel format
     * 
     * Returns:
     * {Object} MapObject LonLat translated from MapObject Pixel
     */
    getMapObjectLonLatFromMapObjectPixel: function(moPixel) {
        var size = this.map.getSize();
        var lon = this.getLongitudeFromMapObjectLonLat(this.mapObject.center);
        var lat = this.getLatitudeFromMapObjectLonLat(this.mapObject.center);
        var res = this.map.getResolution();

        var delta_x = moPixel.x - (size.w / 2);
        var delta_y = moPixel.y - (size.h / 2);
    
        var lonlat = new OpenLayers.LonLat(
            lon + delta_x * res,
            lat - delta_y * res
        ); 

        if (this.wrapDateLine) {
            lonlat = lonlat.wrapDateLine(this.maxExtent);
        }
        return this.getMapObjectLonLatFromLonLat(lonlat.lon, lonlat.lat);
    },

    /**
     * APIMethod: getMapObjectPixelFromMapObjectLonLat
     * 
     * Parameters:
     * moLonLat - {Object} MapObject LonLat format
     * 
     * Returns:
     * {Object} MapObject Pixel transtlated from MapObject LonLat
     */
    getMapObjectPixelFromMapObjectLonLat: function(moLonLat) {
        var lon = this.getLongitudeFromMapObjectLonLat(moLonLat);
        var lat = this.getLatitudeFromMapObjectLonLat(moLonLat);
        var res = this.map.getResolution();
        var extent = this.map.getExtent();
        return this.getMapObjectPixelFromXY((1/res * (lon - extent.left)),
                                            (1/res * (extent.top - lat)));
    },

  
    /** 
     * APIMethod: setMapObjectCenter
     * Set the mapObject to the specified center and zoom
     * 
     * Parameters:
     * center - {Object} MapObject LonLat format
     * zoom - {int} MapObject zoom format
     */
    setMapObjectCenter: function(center, zoom) {
        if (this.animationEnabled === false && zoom != this.mapObject.zoom) {
            var mapContainer = this.getMapContainer();
            google.maps.event.addListenerOnce(
                this.mapObject, 
                "idle", 
                function() {
                    mapContainer.style.visibility = "";
                }
            );
            mapContainer.style.visibility = "hidden";
        }
        this.mapObject.setOptions({
            center: center,
            zoom: zoom
        });
    },
   
    
  // Bounds
  
    /** 
     * APIMethod: getMapObjectZoomFromMapObjectBounds
     * 
     * Parameters:
     * moBounds - {Object} MapObject Bounds format
     * 
     * Returns:
     * {Object} MapObject Zoom for specified MapObject Bounds
     */
    getMapObjectZoomFromMapObjectBounds: function(moBounds) {
        return this.mapObject.getBoundsZoomLevel(moBounds);
    },

    /************************************
     *                                  *
     *       MapObject Primitives       *
     *                                  *
     ************************************/


  // LonLat
    
    /**
     * APIMethod: getMapObjectLonLatFromLonLat
     * 
     * Parameters:
     * lon - {Float}
     * lat - {Float}
     * 
     * Returns:
     * {Object} MapObject LonLat built from lon and lat params
     */
    getMapObjectLonLatFromLonLat: function(lon, lat) {
        var gLatLng;
        if(this.sphericalMercator) {
            var lonlat = this.inverseMercator(lon, lat);
            gLatLng = new google.maps.LatLng(lonlat.lat, lonlat.lon);
        } else {
            gLatLng = new google.maps.LatLng(lat, lon);
        }
        return gLatLng;
    },
    
  // Pixel
    
    /**
     * APIMethod: getMapObjectPixelFromXY
     * 
     * Parameters:
     * x - {Integer}
     * y - {Integer}
     * 
     * Returns:
     * {Object} MapObject Pixel from x and y parameters
     */
    getMapObjectPixelFromXY: function(x, y) {
        return new google.maps.Point(x, y);
    },
        
    /**
     * APIMethod: destroy
     * Clean up this layer.
     */
    destroy: function() {
        if (this.repositionListener) {
            google.maps.event.removeListener(this.repositionListener);
        }
        if (this.repositionTimer) {
            window.clearTimeout(this.repositionTimer);
        }
        OpenLayers.Layer.Google.prototype.destroy.apply(this, arguments);
    }
    
};
/* ======================================================================
    OpenLayers/Format/WPSDescribeProcess.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */
 
/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/OWSCommon/v1_1_0.js
 */

/**
 * Class: OpenLayers.Format.WPSDescribeProcess
 * Read WPS DescribeProcess responses. 
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WPSDescribeProcess = OpenLayers.Class(
    OpenLayers.Format.XML, {
    
    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        wps: "http://www.opengis.net/wps/1.0.0",
        ows: "http://www.opengis.net/ows/1.1",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: schemaLocation
     * {String} Schema location
     */
    schemaLocation: "http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd",

    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "wps",

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },
    
    /**
     * Constructor: OpenLayers.Format.WPSDescribeProcess
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Parse a WPS DescribeProcess and return an object with its information.
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object}
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var info = {};
        this.readNode(data, info);
        return info;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wps": {
            "ProcessDescriptions": function(node, obj) {
                obj.processDescriptions = {};
                this.readChildNodes(node, obj.processDescriptions);
            },
            "ProcessDescription": function(node, processDescriptions) {
                var processVersion = this.getAttributeNS(node, this.namespaces.wps, "processVersion");
                var processDescription = {
                    processVersion: processVersion,
                    statusSupported: (node.getAttribute("statusSupported") === "true"),
                    storeSupported: (node.getAttribute("storeSupported") === "true")
                };
                this.readChildNodes(node, processDescription);
                processDescriptions[processDescription.identifier] = processDescription;
            },
            "DataInputs": function(node, processDescription) {
                processDescription.dataInputs = [];
                this.readChildNodes(node, processDescription.dataInputs);
            },
            "ProcessOutputs": function(node, processDescription) {
                processDescription.processOutputs = [];
                this.readChildNodes(node, processDescription.processOutputs);
            },
            "Output": function(node, processOutputs) {
                var output = {};
                this.readChildNodes(node, output);
                processOutputs.push(output);
            },
            "ComplexOutput": function(node, output) {
                output.complexOutput = {};
                this.readChildNodes(node, output.complexOutput);
            },
            "Input": function(node, dataInputs) {
                var input = {
                    maxOccurs: parseInt(node.getAttribute("maxOccurs")),
                    minOccurs: parseInt(node.getAttribute("minOccurs"))
                };
                this.readChildNodes(node, input);
                dataInputs.push(input);
            },
            "BoundingBoxData": function(node, input) {
                input.boundingBoxData = {};
                this.readChildNodes(node, input.boundingBoxData);
            },
            "CRS": function(node, obj) {
                if (!obj.CRSs) {
                    obj.CRSs = {};
                }
                obj.CRSs[this.getChildValue(node)] = true;
            },
            "LiteralData": function(node, input) {
                input.literalData = {};
                this.readChildNodes(node, input.literalData);
            },
            "ComplexData": function(node, input) {
                input.complexData = {};
                this.readChildNodes(node,  input.complexData);
            },
            "Default": function(node, complexData) {
                complexData["default"] = {};
                this.readChildNodes(node,  complexData["default"]);
            },
            "Supported": function(node, complexData) {
                complexData["supported"] = {};
                this.readChildNodes(node,  complexData["supported"]);
            },
            "Format": function(node, obj) {
                var format = {};
                this.readChildNodes(node, format);
                if (!obj.formats) {
                    obj.formats = {};
                }
                obj.formats[format.mimeType] = true;
            },
            "MimeType": function(node, format) {
                format.mimeType = this.getChildValue(node);
            }
        },
        "ows": OpenLayers.Format.OWSCommon.v1_1_0.prototype.readers["ows"]
    },
    
    CLASS_NAME: "OpenLayers.Format.WPSDescribeProcess" 

});
/* ======================================================================
    OpenLayers/Format/CSWGetRecords/v2_0_2.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/CSWGetRecords.js
 * @requires OpenLayers/Format/Filter/v1_0_0.js
 * @requires OpenLayers/Format/Filter/v1_1_0.js
 * @requires OpenLayers/Format/OWSCommon/v1_0_0.js
 */

/**
 * Class: OpenLayers.Format.CSWGetRecords.v2_0_2
 *     A format for creating CSWGetRecords v2.0.2 transactions. 
 *     Create a new instance with the
 *     <OpenLayers.Format.CSWGetRecords.v2_0_2> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.CSWGetRecords.v2_0_2 = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        csw: "http://www.opengis.net/cat/csw/2.0.2",
        dc: "http://purl.org/dc/elements/1.1/",
        dct: "http://purl.org/dc/terms/",
        gmd: "http://www.isotc211.org/2005/gmd",
        geonet: "http://www.fao.org/geonetwork",
        ogc: "http://www.opengis.net/ogc",
        ows: "http://www.opengis.net/ows",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },
    
    /**
     * Property: defaultPrefix
     * {String} The default prefix (used by Format.XML).
     */
    defaultPrefix: "csw",
    
    /**
     * Property: version
     * {String} CSW version number.
     */
    version: "2.0.2",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/cat/csw/2.0.2
     *   http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd
     */
    schemaLocation: "http://www.opengis.net/cat/csw/2.0.2 http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd",

    /**
     * APIProperty: requestId
     * {String} Value of the requestId attribute of the GetRecords element.
     */
    requestId: null,

    /**
     * APIProperty: resultType
     * {String} Value of the resultType attribute of the GetRecords element,
     *     specifies the result type in the GetRecords response, "hits" is
     *     the default.
     */
    resultType: null,

    /**
     * APIProperty: outputFormat
     * {String} Value of the outputFormat attribute of the GetRecords element,
     *     specifies the format of the GetRecords response,
     *     "application/xml" is the default.
     */
    outputFormat: null,

    /**
     * APIProperty: outputSchema
     * {String} Value of the outputSchema attribute of the GetRecords element,
     *     specifies the schema of the GetRecords response.
     */
    outputSchema: null,

    /**
     * APIProperty: startPosition
     * {String} Value of the startPosition attribute of the GetRecords element,
     *     specifies the start position (offset+1) for the GetRecords response,
     *     1 is the default.
     */
    startPosition: null,

    /**
     * APIProperty: maxRecords
     * {String} Value of the maxRecords attribute of the GetRecords element,
     *     specifies the maximum number of records in the GetRecords response,
     *     10 is the default.
     */
    maxRecords: null,

    /**
     * APIProperty: DistributedSearch
     * {String} Value of the csw:DistributedSearch element, used when writing
     *     a csw:GetRecords document.
     */
    DistributedSearch: null,

    /**
     * APIProperty: ResponseHandler
     * {Array({String})} Values of the csw:ResponseHandler elements, used when
     *     writting a csw:GetRecords document.
     */
    ResponseHandler: null,

    /**
     * APIProperty: Query
     * {String} Value of the csw:Query element, used when writing a csw:GetRecords
     *     document.
     */
    Query: null,

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Constructor: OpenLayers.Format.CSWGetRecords.v2_0_2
     * A class for parsing and generating CSWGetRecords v2.0.2 transactions.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties (documented as class properties):
     * - requestId
     * - resultType
     * - outputFormat
     * - outputSchema
     * - startPosition
     * - maxRecords
     * - DistributedSearch
     * - ResponseHandler
     * - Query
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },

    /**
     * APIMethod: read
     * Parse the response from a GetRecords request.
     */
    read: function(data) {
        if(typeof data == "string") { 
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var obj = {};
        this.readNode(data, obj);
        return obj;
    },
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "csw": {
            "GetRecordsResponse": function(node, obj) {
                obj.records = [];
                this.readChildNodes(node, obj);
                var version = this.getAttributeNS(node, "", 'version');
                if (version != "") {
                    obj.version = version;
                }
            },
            "RequestId": function(node, obj) {
                obj.RequestId = this.getChildValue(node);
            },
            "SearchStatus": function(node, obj) {
                obj.SearchStatus = {};
                var timestamp = this.getAttributeNS(node, "", 'timestamp');
                if (timestamp != "") {
                    obj.SearchStatus.timestamp = timestamp;
                }
            },
            "SearchResults": function(node, obj) {
                this.readChildNodes(node, obj);
                var attrs = node.attributes;
                var SearchResults = {};
                for(var i=0, len=attrs.length; i<len; ++i) {
                    if ((attrs[i].name == "numberOfRecordsMatched") ||
                        (attrs[i].name == "numberOfRecordsReturned") ||
                        (attrs[i].name == "nextRecord")) {
                        SearchResults[attrs[i].name] = parseInt(attrs[i].nodeValue);
                    } else {
                        SearchResults[attrs[i].name] = attrs[i].nodeValue;
                    }
                }
                obj.SearchResults = SearchResults;
            },
            "SummaryRecord": function(node, obj) {
                var record = {type: "SummaryRecord"};
                this.readChildNodes(node, record);
                obj.records.push(record);
            },
            "BriefRecord": function(node, obj) {
                var record = {type: "BriefRecord"};
                this.readChildNodes(node, record);
                obj.records.push(record);
            },
            "DCMIRecord": function(node, obj) {
                var record = {type: "DCMIRecord"};
                this.readChildNodes(node, record);
                obj.records.push(record);
            },
            "Record": function(node, obj) {
                var record = {type: "Record"};
                this.readChildNodes(node, record);
                obj.records.push(record);
            },
            "*": function(node, obj) {
                var name = node.localName || node.nodeName.split(":").pop();
                obj[name] = this.getChildValue(node);
            }
        },
        "geonet": {
            "info": function(node, obj) {
                var gninfo = {};
                this.readChildNodes(node, gninfo);
                obj.gninfo = gninfo;
            }
        },
        "dc": {
            // audience, contributor, coverage, creator, date, description, format,
            // identifier, language, provenance, publisher, relation, rights,
            // rightsHolder, source, subject, title, type, URI
            "*": function(node, obj) {
                var name = node.localName || node.nodeName.split(":").pop();
                if (!(OpenLayers.Util.isArray(obj[name]))) {
                    obj[name] = [];
                }
                var dc_element = {};
                var attrs = node.attributes;
                for(var i=0, len=attrs.length; i<len; ++i) {
                    dc_element[attrs[i].name] = attrs[i].nodeValue;
                }
                dc_element.value = this.getChildValue(node);
                if (dc_element.value != "") {
                    obj[name].push(dc_element);
                }
            }
        },
        "dct": {
            // abstract, modified, spatial
            "*": function(node, obj) {
                var name = node.localName || node.nodeName.split(":").pop();
                if (!(OpenLayers.Util.isArray(obj[name]))) {
                    obj[name] = [];
                }
                obj[name].push(this.getChildValue(node));
            }
        },
        "ows": OpenLayers.Util.applyDefaults({
            "BoundingBox": function(node, obj) {
                if (obj.bounds) {
                    obj.BoundingBox = [{crs: obj.projection, value: 
                        [
                            obj.bounds.left, 
                            obj.bounds.bottom, 
                            obj.bounds.right, 
                            obj.bounds.top
                    ]
                    }];
                    delete obj.projection;
                    delete obj.bounds;
                }
                OpenLayers.Format.OWSCommon.v1_0_0.prototype.readers["ows"]["BoundingBox"].apply(
                    this, arguments);
            }
        }, OpenLayers.Format.OWSCommon.v1_0_0.prototype.readers["ows"])
    },
    
    /**
     * Method: write
     * Given an configuration js object, write a CSWGetRecords request. 
     *
     * Parameters:
     * options - {Object} A object mapping the request.
     *
     * Returns:
     * {String} A serialized CSWGetRecords request.
     */
    write: function(options) {
        var node = this.writeNode("csw:GetRecords", options);
        node.setAttribute("xmlns:gmd", this.namespaces.gmd);
        return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "csw": {
            "GetRecords": function(options) {
                if (!options) {
                    options = {};
                }
                var node = this.createElementNSPlus("csw:GetRecords", {
                    attributes: {
                        service: "CSW",
                        version: this.version,
                        requestId: options.requestId || this.requestId,
                        resultType: options.resultType || this.resultType,
                        outputFormat: options.outputFormat || this.outputFormat,
                        outputSchema: options.outputSchema || this.outputSchema,
                        startPosition: options.startPosition || this.startPosition,
                        maxRecords: options.maxRecords || this.maxRecords
                    }
                });
                if (options.DistributedSearch || this.DistributedSearch) {
                    this.writeNode(
                        "csw:DistributedSearch",
                        options.DistributedSearch || this.DistributedSearch,
                        node
                    );
                }
                var ResponseHandler = options.ResponseHandler || this.ResponseHandler;
                if (OpenLayers.Util.isArray(ResponseHandler) && ResponseHandler.length > 0) {
                    // ResponseHandler must be a non-empty array
                    for(var i=0, len=ResponseHandler.length; i<len; i++) {
                        this.writeNode(
                            "csw:ResponseHandler",
                            ResponseHandler[i],
                            node
                        );
                    }
                }
                this.writeNode("Query", options.Query || this.Query, node);
                return node;
            },
            "DistributedSearch": function(options) {
                var node = this.createElementNSPlus("csw:DistributedSearch", {
                    attributes: {
                        hopCount: options.hopCount
                    }
                });
                return node;
            },
            "ResponseHandler": function(options) {
                var node = this.createElementNSPlus("csw:ResponseHandler", {
                    value: options.value
                });
                return node;
            },
            "Query": function(options) {
                if (!options) {
                    options = {};
                }
                var node = this.createElementNSPlus("csw:Query", {
                    attributes: {
                        typeNames: options.typeNames || "csw:Record"
                    }
                });
                var ElementName = options.ElementName;
                if (OpenLayers.Util.isArray(ElementName) && ElementName.length > 0) {
                    // ElementName must be a non-empty array
                    for(var i=0, len=ElementName.length; i<len; i++) {
                        this.writeNode(
                            "csw:ElementName",
                            ElementName[i],
                            node
                        );
                    }
                } else {
                    this.writeNode(
                        "csw:ElementSetName",
                        options.ElementSetName || {value: 'summary'},
                        node
                    );
                }
                if (options.Constraint) {
                    this.writeNode(
                        "csw:Constraint",
                        options.Constraint,
                        node
                    );
                }
                if (options.SortBy) {
                    this.writeNode(
                        "ogc:SortBy",
                        options.SortBy,
                        node
                    );
                }
                return node;
            },
            "ElementName": function(options) {
                var node = this.createElementNSPlus("csw:ElementName", {
                    value: options.value
                });
                return node;
            },
            "ElementSetName": function(options) {
                var node = this.createElementNSPlus("csw:ElementSetName", {
                    attributes: {
                        typeNames: options.typeNames
                    },
                    value: options.value
                });
                return node;
            },
            "Constraint": function(options) {
                var node = this.createElementNSPlus("csw:Constraint", {
                    attributes: {
                        version: options.version
                    }
                });
                if (options.Filter) {
                    var format = new OpenLayers.Format.Filter({
                        version: options.version
                    });
                    node.appendChild(format.write(options.Filter));
                } else if (options.CqlText) {
                    var child = this.createElementNSPlus("CqlText", {
                        value: options.CqlText.value
                    });
                    node.appendChild(child);
                }
                return node;
            }
        },
        "ogc": OpenLayers.Format.Filter.v1_1_0.prototype.writers["ogc"]
    },
   
    CLASS_NAME: "OpenLayers.Format.CSWGetRecords.v2_0_2" 
});
/* ======================================================================
    OpenLayers/Marker/Box.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Marker.js
 */

/**
 * Class: OpenLayers.Marker.Box
 *
 * Inherits from:
 *  - <OpenLayers.Marker> 
 */
OpenLayers.Marker.Box = OpenLayers.Class(OpenLayers.Marker, {

    /** 
     * Property: bounds 
     * {<OpenLayers.Bounds>} 
     */
    bounds: null,

    /** 
     * Property: div 
     * {DOMElement} 
     */
    div: null,
    
    /** 
     * Constructor: OpenLayers.Marker.Box
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     * borderColor - {String} 
     * borderWidth - {int} 
     */
    initialize: function(bounds, borderColor, borderWidth) {
        this.bounds = bounds;
        this.div    = OpenLayers.Util.createDiv();
        this.div.style.overflow = 'hidden';
        this.events = new OpenLayers.Events(this, this.div);
        this.setBorder(borderColor, borderWidth);
    },

    /**
     * Method: destroy 
     */    
    destroy: function() {

        this.bounds = null;
        this.div = null;

        OpenLayers.Marker.prototype.destroy.apply(this, arguments);
    },

    /** 
     * Method: setBorder
     * Allow the user to change the box's color and border width
     * 
     * Parameters:
     * color - {String} Default is "red"
     * width - {int} Default is 2
     */
    setBorder: function (color, width) {
        if (!color) {
            color = "red";
        }
        if (!width) {
            width = 2;
        }
        this.div.style.border = width + "px solid " + color;
    },
    
    /** 
    * Method: draw
    * 
    * Parameters:
    * px - {<OpenLayers.Pixel>} 
    * sz - {<OpenLayers.Size>} 
    * 
    * Returns: 
    * {DOMElement} A new DOM Image with this marker's icon set at the 
    *         location passed-in
    */
    draw: function(px, sz) {
        OpenLayers.Util.modifyDOMElement(this.div, null, px, sz);
        return this.div;
    }, 

    /**
     * Method: onScreen
     * 
     * Rreturn:
     * {Boolean} Whether or not the marker is currently visible on screen.
     */
    onScreen:function() {
        var onScreen = false;
        if (this.map) {
            var screenBounds = this.map.getExtent();
            onScreen = screenBounds.containsBounds(this.bounds, true, true);
        }    
        return onScreen;
    },
    
    /**
     * Method: display
     * Hide or show the icon
     * 
     * Parameters:
     * display - {Boolean} 
     */
    display: function(display) {
        this.div.style.display = (display) ? "" : "none";
    },

    CLASS_NAME: "OpenLayers.Marker.Box"
});

/* ======================================================================
    OpenLayers/Format/Text.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 */

/**
 * Class: OpenLayers.Format.Text
 * Read Text format. Create a new instance with the <OpenLayers.Format.Text>
 *     constructor. This reads text which is formatted like CSV text, using
 *     tabs as the seperator by default. It provides parsing of data originally
 *     used in the MapViewerService, described on the wiki. This Format is used
 *     by the <OpenLayers.Layer.Text> class.
 *
 * Inherits from:
 *  - <OpenLayers.Format>
 */
OpenLayers.Format.Text = OpenLayers.Class(OpenLayers.Format, {
    
    /**
     * APIProperty: defaultStyle
     * defaultStyle allows one to control the default styling of the features.
     *    It should be a symbolizer hash. By default, this is set to match the
     *    Layer.Text behavior, which is to use the default OpenLayers Icon.
     */
    defaultStyle: null,
     
    /**
     * APIProperty: extractStyles
     * set to true to extract styles from the TSV files, using information
     * from the image or icon, iconSize and iconOffset fields. This will result
     * in features with a symbolizer (style) property set, using the
     * default symbolizer specified in <defaultStyle>. Set to false if you
     * wish to use a styleMap or OpenLayers.Style options to style your
     * layer instead.
     */
    extractStyles: true,

    /**
     * Constructor: OpenLayers.Format.Text
     * Create a new parser for TSV Text.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        options = options || {};

        if(options.extractStyles !== false) {
            options.defaultStyle = {
                'externalGraphic': OpenLayers.Util.getImageLocation("marker.png"),
                'graphicWidth': 21,
                'graphicHeight': 25,
                'graphicXOffset': -10.5,
                'graphicYOffset': -12.5
            };
        }
        
        OpenLayers.Format.prototype.initialize.apply(this, [options]);
    }, 

    /**
     * APIMethod: read
     * Return a list of features from a Tab Seperated Values text string.
     * 
     * Parameters:
     * text - {String} 
     *
     * Returns:
     * Array({<OpenLayers.Feature.Vector>})
     */
    read: function(text) {
        var lines = text.split('\n');
        var columns;
        var features = [];
        // length - 1 to allow for trailing new line
        for (var lcv = 0; lcv < (lines.length - 1); lcv++) {
            var currLine = lines[lcv].replace(/^\s*/,'').replace(/\s*$/,'');
        
            if (currLine.charAt(0) != '#') { /* not a comment */
            
                if (!columns) {
                    //First line is columns
                    columns = currLine.split('\t');
                } else {
                    var vals = currLine.split('\t');
                    var geometry = new OpenLayers.Geometry.Point(0,0);
                    var attributes = {};
                    var style = this.defaultStyle ? 
                        OpenLayers.Util.applyDefaults({}, this.defaultStyle) :
                        null;  
                    var icon, iconSize, iconOffset, overflow;
                    var set = false;
                    for (var valIndex = 0; valIndex < vals.length; valIndex++) {
                        if (vals[valIndex]) {
                            if (columns[valIndex] == 'point') {
                                var coords = vals[valIndex].split(',');
                                geometry.y = parseFloat(coords[0]);
                                geometry.x = parseFloat(coords[1]);
                                set = true;
                            } else if (columns[valIndex] == 'lat') {
                                geometry.y = parseFloat(vals[valIndex]);
                                set = true;
                            } else if (columns[valIndex] == 'lon') {
                                geometry.x = parseFloat(vals[valIndex]);
                                set = true;
                            } else if (columns[valIndex] == 'title')
                                attributes['title'] = vals[valIndex];
                            else if (columns[valIndex] == 'image' ||
                                     columns[valIndex] == 'icon' && style) {
                                style['externalGraphic'] = vals[valIndex];
                            } else if (columns[valIndex] == 'iconSize' && style) {
                                var size = vals[valIndex].split(',');
                                style['graphicWidth'] = parseFloat(size[0]);
                                style['graphicHeight'] = parseFloat(size[1]);
                            } else if (columns[valIndex] == 'iconOffset' && style) {
                                var offset = vals[valIndex].split(',');
                                style['graphicXOffset'] = parseFloat(offset[0]);
                                style['graphicYOffset'] = parseFloat(offset[1]);
                            } else if (columns[valIndex] == 'description') {
                                attributes['description'] = vals[valIndex];
                            } else if (columns[valIndex] == 'overflow') {
                                attributes['overflow'] = vals[valIndex];
                            } else {
                                // For StyleMap filtering, allow additional
                                // columns to be stored as attributes.
                                attributes[columns[valIndex]] = vals[valIndex];
                            }    
                        }
                    }
                    if (set) {
                      if (this.internalProjection && this.externalProjection) {
                          geometry.transform(this.externalProjection, 
                                             this.internalProjection); 
                      }
                      var feature = new OpenLayers.Feature.Vector(geometry, attributes, style);
                      features.push(feature);
                    }
                }
            }
        }
        return features;
    },   

    CLASS_NAME: "OpenLayers.Format.Text" 
});    
/* ======================================================================
    OpenLayers/Layer/Text.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Markers.js
 * @requires OpenLayers/Format/Text.js
 * @requires OpenLayers/Request/XMLHttpRequest.js
 */

/**
 * Class: OpenLayers.Layer.Text
 * This layer creates markers given data in a text file.  The <location>
 *     property of the layer (specified as a property of the options argument
 *     in the <OpenLayers.Layer.Text> constructor) points to a tab delimited
 *     file with data used to create markers.
 *
 * The first row of the data file should be a header line with the column names
 *     of the data. Each column should be delimited by a tab space. The
 *     possible columns are:
 *      - *point* lat,lon of the point where a marker is to be placed
 *      - *lat*  Latitude of the point where a marker is to be placed
 *      - *lon*  Longitude of the point where a marker is to be placed
 *      - *icon* or *image* URL of marker icon to use.
 *      - *iconSize* Size of Icon to use.
 *      - *iconOffset* Where the top-left corner of the icon is to be placed
 *            relative to the latitude and longitude of the point.
 *      - *title* The text of the 'title' is placed inside an 'h2' marker
 *            inside a popup, which opens when the marker is clicked.
 *      - *description* The text of the 'description' is placed below the h2
 *            in the popup. this can be plain text or HTML.
 *
 * Example text file:
 * (code)
 * lat	lon	title	description	iconSize	iconOffset	icon
 * 10	20	title	description	21,25		-10,-25		http://www.openlayers.org/dev/img/marker.png
 * (end)
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Markers>
 */
OpenLayers.Layer.Text = OpenLayers.Class(OpenLayers.Layer.Markers, {

    /**
     * APIProperty: location 
     * {String} URL of text file.  Must be specified in the "options" argument
     *   of the constructor. Can not be changed once passed in. 
     */
    location:null,

    /** 
     * Property: features
     * {Array(<OpenLayers.Feature>)} 
     */
    features: null,
    
    /**
     * APIProperty: formatOptions
     * {Object} Hash of options which should be passed to the format when it is
     * created. Must be passed in the constructor.
     */
    formatOptions: null, 

    /** 
     * Property: selectedFeature
     * {<OpenLayers.Feature>}
     */
    selectedFeature: null,

    /**
     * Constructor: OpenLayers.Layer.Text
     * Create a text layer.
     * 
     * Parameters:
     * name - {String} 
     * options - {Object} Object with properties to be set on the layer.
     *     Must include <location> property.
     */
    initialize: function(name, options) {
        OpenLayers.Layer.Markers.prototype.initialize.apply(this, arguments);
        this.features = [];
    },

    /**
     * APIMethod: destroy 
     */
    destroy: function() {
        // Warning: Layer.Markers.destroy() must be called prior to calling
        // clearFeatures() here, otherwise we leak memory. Indeed, if
        // Layer.Markers.destroy() is called after clearFeatures(), it won't be
        // able to remove the marker image elements from the layer's div since
        // the markers will have been destroyed by clearFeatures().
        OpenLayers.Layer.Markers.prototype.destroy.apply(this, arguments);
        this.clearFeatures();
        this.features = null;
    },
    
    /**
     * Method: loadText
     * Start the load of the Text data. Don't do this when we first add the layer,
     * since we may not be visible at any point, and it would therefore be a waste.
     */
    loadText: function() {
        if (!this.loaded) {
            if (this.location != null) {

                var onFail = function(e) {
                    this.events.triggerEvent("loadend");
                };

                this.events.triggerEvent("loadstart");
                OpenLayers.Request.GET({
                    url: this.location,
                    success: this.parseData,
                    failure: onFail,
                    scope: this
                });
                this.loaded = true;
            }
        }    
    },    
    
    /**
     * Method: moveTo
     * If layer is visible and Text has not been loaded, load Text. 
     * 
     * Parameters:
     * bounds - {Object} 
     * zoomChanged - {Object} 
     * minor - {Object} 
     */
    moveTo:function(bounds, zoomChanged, minor) {
        OpenLayers.Layer.Markers.prototype.moveTo.apply(this, arguments);
        if(this.visibility && !this.loaded){
            this.loadText();
        }
    },
    
    /**
     * Method: parseData
     *
     * Parameters:
     * ajaxRequest - {<OpenLayers.Request.XMLHttpRequest>} 
     */
    parseData: function(ajaxRequest) {
        var text = ajaxRequest.responseText;
        
        var options = {};
        
        OpenLayers.Util.extend(options, this.formatOptions);
        
        if (this.map && !this.projection.equals(this.map.getProjectionObject())) {
            options.externalProjection = this.projection;
            options.internalProjection = this.map.getProjectionObject();
        }    
        
        var parser = new OpenLayers.Format.Text(options);
        var features = parser.read(text);
        for (var i=0, len=features.length; i<len; i++) {
            var data = {};
            var feature = features[i];
            var location;
            var iconSize, iconOffset;
            
            location = new OpenLayers.LonLat(feature.geometry.x, 
                                             feature.geometry.y);
            
            if (feature.style.graphicWidth 
                && feature.style.graphicHeight) {
                iconSize = new OpenLayers.Size(
                    feature.style.graphicWidth,
                    feature.style.graphicHeight);
            }        
            
            // FIXME: At the moment, we only use this if we have an 
            // externalGraphic, because icon has no setOffset API Method.
            /**
             * FIXME FIRST!!
             * The Text format does all sorts of parseFloating
             * The result of a parseFloat for a bogus string is NaN.  That
             * means the three possible values here are undefined, NaN, or a
             * number.  The previous check was an identity check for null.  This
             * means it was failing for all undefined or NaN.  A slightly better
             * check is for undefined.  An even better check is to see if the
             * value is a number (see #1441).
             */
            if (feature.style.graphicXOffset !== undefined
                && feature.style.graphicYOffset !== undefined) {
                iconOffset = new OpenLayers.Pixel(
                    feature.style.graphicXOffset, 
                    feature.style.graphicYOffset);
            }
            
            if (feature.style.externalGraphic != null) {
                data.icon = new OpenLayers.Icon(feature.style.externalGraphic, 
                                                iconSize, 
                                                iconOffset);
            } else {
                data.icon = OpenLayers.Marker.defaultIcon();

                //allows for the case where the image url is not 
                // specified but the size is. use a default icon
                // but change the size
                if (iconSize != null) {
                    data.icon.setSize(iconSize);
                }
            }
            
            if ((feature.attributes.title != null) 
                && (feature.attributes.description != null)) {
                data['popupContentHTML'] = 
                    '<h2>'+feature.attributes.title+'</h2>' + 
                    '<p>'+feature.attributes.description+'</p>';
            }
            
            data['overflow'] = feature.attributes.overflow || "auto"; 
            
            var markerFeature = new OpenLayers.Feature(this, location, data);
            this.features.push(markerFeature);
            var marker = markerFeature.createMarker();
            if ((feature.attributes.title != null) 
                && (feature.attributes.description != null)) {
              marker.events.register('click', markerFeature, this.markerClick);
            }
            this.addMarker(marker);
        }
        this.events.triggerEvent("loadend");
    },
    
    /**
     * Property: markerClick
     * 
     * Parameters:
     * evt - {Event} 
     *
     * Context:
     * - {<OpenLayers.Feature>}
     */
    markerClick: function(evt) {
        var sameMarkerClicked = (this == this.layer.selectedFeature);
        this.layer.selectedFeature = (!sameMarkerClicked) ? this : null;
        for(var i=0, len=this.layer.map.popups.length; i<len; i++) {
            this.layer.map.removePopup(this.layer.map.popups[i]);
        }
        if (!sameMarkerClicked) {
            this.layer.map.addPopup(this.createPopup()); 
        }
        OpenLayers.Event.stop(evt);
    },

    /**
     * Method: clearFeatures
     */
    clearFeatures: function() {
        if (this.features != null) {
            while(this.features.length > 0) {
                var feature = this.features[0];
                OpenLayers.Util.removeItem(this.features, feature);
                feature.destroy();
            }
        }        
    },

    CLASS_NAME: "OpenLayers.Layer.Text"
});
/* ======================================================================
    OpenLayers/Handler/RegularPolygon.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler/Drag.js
 */

/**
 * Class: OpenLayers.Handler.RegularPolygon
 * Handler to draw a regular polygon on the map.  Polygon is displayed on mouse
 *     down, moves or is modified on mouse move, and is finished on mouse up.
 *     The handler triggers callbacks for 'done' and 'cancel'.  Create a new
 *     instance with the <OpenLayers.Handler.RegularPolygon> constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Handler.Drag>
 */
OpenLayers.Handler.RegularPolygon = OpenLayers.Class(OpenLayers.Handler.Drag, {
    
    /**
     * APIProperty: sides
     * {Integer} Number of sides for the regular polygon.  Needs to be greater
     *     than 2.  Defaults to 4.
     */
    sides: 4,

    /**
     * APIProperty: radius
     * {Float} Optional radius in map units of the regular polygon.  If this is
     *     set to some non-zero value, a polygon with a fixed radius will be
     *     drawn and dragged with mose movements.  If this property is not
     *     set, dragging changes the radius of the polygon.  Set to null by
     *     default.
     */
    radius: null,
    
    /**
     * APIProperty: snapAngle
     * {Float} If set to a non-zero value, the handler will snap the polygon
     *     rotation to multiples of the snapAngle.  Value is an angle measured
     *     in degrees counterclockwise from the positive x-axis.  
     */
    snapAngle: null,
    
    /**
     * APIProperty: snapToggle
     * {String} If set, snapToggle is checked on mouse events and will set
     *     the snap mode to the opposite of what it currently is.  To disallow
     *     toggling between snap and non-snap mode, set freehandToggle to
     *     null.  Acceptable toggle values are 'shiftKey', 'ctrlKey', and
     *     'altKey'. Snap mode is only possible if this.snapAngle is set to a
     *     non-zero value.
     */
    snapToggle: 'shiftKey',
    
    /**
     * Property: layerOptions
     * {Object} Any optional properties to be set on the sketch layer.
     */
    layerOptions: null,

    /**
     * APIProperty: persist
     * {Boolean} Leave the feature rendered until clear is called.  Default
     *     is false.  If set to true, the feature remains rendered until
     *     clear is called, typically by deactivating the handler or starting
     *     another drawing.
     */
    persist: false,

    /**
     * APIProperty: irregular
     * {Boolean} Draw an irregular polygon instead of a regular polygon.
     *     Default is false.  If true, the initial mouse down will represent
     *     one corner of the polygon bounds and with each mouse movement, the
     *     polygon will be stretched so the opposite corner of its bounds
     *     follows the mouse position.  This property takes precedence over
     *     the radius property.  If set to true, the radius property will
     *     be ignored.
     */
    irregular: false,

    /**
     * APIProperty: citeCompliant
     * {Boolean} If set to true, coordinates of features drawn in a map extent
     * crossing the date line won't exceed the world bounds. Default is false.
     */
    citeCompliant: false,

    /**
     * Property: angle
     * {Float} The angle from the origin (mouse down) to the current mouse
     *     position, in radians.  This is measured counterclockwise from the
     *     positive x-axis.
     */
    angle: null,

    /**
     * Property: fixedRadius
     * {Boolean} The polygon has a fixed radius.  True if a radius is set before
     *     drawing begins.  False otherwise.
     */
    fixedRadius: false,

    /**
     * Property: feature
     * {<OpenLayers.Feature.Vector>} The currently drawn polygon feature
     */
    feature: null,

    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>} The temporary drawing layer
     */
    layer: null,

    /**
     * Property: origin
     * {<OpenLayers.Geometry.Point>} Location of the first mouse down
     */
    origin: null,

    /**
     * Constructor: OpenLayers.Handler.RegularPolygon
     * Create a new regular polygon handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that owns this handler
     * callbacks - {Object} An object with a properties whose values are
     *     functions.  Various callbacks described below.
     * options - {Object} An object with properties to be set on the handler.
     *     If the options.sides property is not specified, the number of sides
     *     will default to 4.
     *
     * Named callbacks:
     * create - Called when a sketch is first created.  Callback called with
     *     the creation point geometry and sketch feature.
     * done - Called when the sketch drawing is finished.  The callback will
     *     recieve a single argument, the sketch geometry.
     * cancel - Called when the handler is deactivated while drawing.  The
     *     cancel callback will receive a geometry.
     */
    initialize: function(control, callbacks, options) {
        if(!(options && options.layerOptions && options.layerOptions.styleMap)) {
            this.style = OpenLayers.Util.extend(OpenLayers.Feature.Vector.style['default'], {});
        }

        OpenLayers.Handler.Drag.prototype.initialize.apply(this,
                                                [control, callbacks, options]);
        this.options = (options) ? options : {};
    },
    
    /**
     * APIMethod: setOptions
     * 
     * Parameters:
     * newOptions - {Object} 
     */
    setOptions: function (newOptions) {
        OpenLayers.Util.extend(this.options, newOptions);
        OpenLayers.Util.extend(this, newOptions);
    },
    
    /**
     * APIMethod: activate
     * Turn on the handler.
     *
     * Returns:
     * {Boolean} The handler was successfully activated
     */
    activate: function() {
        var activated = false;
        if(OpenLayers.Handler.Drag.prototype.activate.apply(this, arguments)) {
            // create temporary vector layer for rendering geometry sketch
            var options = OpenLayers.Util.extend({
                displayInLayerSwitcher: false,
                // indicate that the temp vector layer will never be out of range
                // without this, resolution properties must be specified at the
                // map-level for this temporary layer to init its resolutions
                // correctly
                calculateInRange: OpenLayers.Function.True,
                wrapDateLine: this.citeCompliant
            }, this.layerOptions);
            this.layer = new OpenLayers.Layer.Vector(this.CLASS_NAME, options);
            this.map.addLayer(this.layer);
            activated = true;
        }
        return activated;
    },

    /**
     * APIMethod: deactivate
     * Turn off the handler.
     *
     * Returns:
     * {Boolean} The handler was successfully deactivated
     */
    deactivate: function() {
        var deactivated = false;
        if(OpenLayers.Handler.Drag.prototype.deactivate.apply(this, arguments)) {
            // call the cancel callback if mid-drawing
            if(this.dragging) {
                this.cancel();
            }
            // If a layer's map property is set to null, it means that that
            // layer isn't added to the map. Since we ourself added the layer
            // to the map in activate(), we can assume that if this.layer.map
            // is null it means that the layer has been destroyed (as a result
            // of map.destroy() for example.
            if (this.layer.map != null) {
                this.layer.destroy(false);
                if (this.feature) {
                    this.feature.destroy();
                }
            }
            this.layer = null;
            this.feature = null;
            deactivated = true;
        }
        return deactivated;
    },
    
    /**
     * Method: down
     * Start drawing a new feature
     *
     * Parameters:
     * evt - {Event} The drag start event
     */
    down: function(evt) {
        this.fixedRadius = !!(this.radius);
        var maploc = this.layer.getLonLatFromViewPortPx(evt.xy); 
        this.origin = new OpenLayers.Geometry.Point(maploc.lon, maploc.lat);
        // create the new polygon
        if(!this.fixedRadius || this.irregular) {
            // smallest radius should not be less one pixel in map units
            // VML doesn't behave well with smaller
            this.radius = this.map.getResolution();
        }
        if(this.persist) {
            this.clear();
        }
        this.feature = new OpenLayers.Feature.Vector();
        this.createGeometry();
        this.callback("create", [this.origin, this.feature]);
        this.layer.addFeatures([this.feature], {silent: true});
        this.layer.drawFeature(this.feature, this.style);
    },
    
    /**
     * Method: move
     * Respond to drag move events
     *
     * Parameters:
     * evt - {Evt} The move event
     */
    move: function(evt) {
        var maploc = this.layer.getLonLatFromViewPortPx(evt.xy); 
        var point = new OpenLayers.Geometry.Point(maploc.lon, maploc.lat);
        if(this.irregular) {
            var ry = Math.sqrt(2) * Math.abs(point.y - this.origin.y) / 2;
            this.radius = Math.max(this.map.getResolution() / 2, ry);
        } else if(this.fixedRadius) {
            this.origin = point;
        } else {
            this.calculateAngle(point, evt);
            this.radius = Math.max(this.map.getResolution() / 2,
                                   point.distanceTo(this.origin));
        }
        this.modifyGeometry();
        if(this.irregular) {
            var dx = point.x - this.origin.x;
            var dy = point.y - this.origin.y;
            var ratio;
            if(dy == 0) {
                ratio = dx / (this.radius * Math.sqrt(2));
            } else {
                ratio = dx / dy;
            }
            this.feature.geometry.resize(1, this.origin, ratio);
            this.feature.geometry.move(dx / 2, dy / 2);
        }
        this.layer.drawFeature(this.feature, this.style);
    },

    /**
     * Method: up
     * Finish drawing the feature
     *
     * Parameters:
     * evt - {Event} The mouse up event
     */
    up: function(evt) {
        this.finalize();
        // the mouseup method of superclass doesn't call the
        // "done" callback if there's been no move between
        // down and up
        if (this.start == this.last) {
            this.callback("done", [evt.xy]);
        }
    },

    /**
     * Method: out
     * Finish drawing the feature.
     *
     * Parameters:
     * evt - {Event} The mouse out event
     */
    out: function(evt) {
        this.finalize();
    },

    /**
     * Method: createGeometry
     * Create the new polygon geometry.  This is called at the start of the
     *     drag and at any point during the drag if the number of sides
     *     changes.
     */
    createGeometry: function() {
        this.angle = Math.PI * ((1/this.sides) - (1/2));
        if(this.snapAngle) {
            this.angle += this.snapAngle * (Math.PI / 180);
        }
        this.feature.geometry = OpenLayers.Geometry.Polygon.createRegularPolygon(
            this.origin, this.radius, this.sides, this.snapAngle
        );
    },
    
    /**
     * Method: modifyGeometry
     * Modify the polygon geometry in place.
     */
    modifyGeometry: function() {
        var angle, point;
        var ring = this.feature.geometry.components[0];
        // if the number of sides ever changes, create a new geometry
        if(ring.components.length != (this.sides + 1)) {
            this.createGeometry();
            ring = this.feature.geometry.components[0];
        }
        for(var i=0; i<this.sides; ++i) {
            point = ring.components[i];
            angle = this.angle + (i * 2 * Math.PI / this.sides);
            point.x = this.origin.x + (this.radius * Math.cos(angle));
            point.y = this.origin.y + (this.radius * Math.sin(angle));
            point.clearBounds();
        }
    },
    
    /**
     * Method: calculateAngle
     * Calculate the angle based on settings.
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>}
     * evt - {Event}
     */
    calculateAngle: function(point, evt) {
        var alpha = Math.atan2(point.y - this.origin.y,
                               point.x - this.origin.x);
        if(this.snapAngle && (this.snapToggle && !evt[this.snapToggle])) {
            var snapAngleRad = (Math.PI / 180) * this.snapAngle;
            this.angle = Math.round(alpha / snapAngleRad) * snapAngleRad;
        } else {
            this.angle = alpha;
        }
    },

    /**
     * APIMethod: cancel
     * Finish the geometry and call the "cancel" callback.
     */
    cancel: function() {
        // the polygon geometry gets cloned in the callback method
        this.callback("cancel", null);
        this.finalize();
    },

    /**
     * Method: finalize
     * Finish the geometry and call the "done" callback.
     */
    finalize: function() {
        this.origin = null;
        this.radius = this.options.radius;
    },

    /**
     * APIMethod: clear
     * Clear any rendered features on the temporary layer.  This is called
     *     when the handler is deactivated, canceled, or done (unless persist
     *     is true).
     */
    clear: function() {
        if (this.layer) {
            this.layer.renderer.clear();
            this.layer.destroyFeatures();
        }
    },
    
    /**
     * Method: callback
     * Trigger the control's named callback with the given arguments
     *
     * Parameters:
     * name - {String} The key for the callback that is one of the properties
     *     of the handler's callbacks object.
     * args - {Array} An array of arguments with which to call the callback
     *     (defined by the control).
     */
    callback: function (name, args) {
        // override the callback method to always send the polygon geometry
        if (this.callbacks[name]) {
            this.callbacks[name].apply(this.control,
                                       [this.feature.geometry.clone()]);
        }
        // since sketch features are added to the temporary layer
        // they must be cleared here if done or cancel
        if(!this.persist && (name == "done" || name == "cancel")) {
            this.clear();
        }
    },

    CLASS_NAME: "OpenLayers.Handler.RegularPolygon"
});
/* ======================================================================
    OpenLayers/Control/SLDSelect.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Layer/WMS.js
 * @requires OpenLayers/Handler/RegularPolygon.js
 * @requires OpenLayers/Handler/Polygon.js
 * @requires OpenLayers/Handler/Path.js
 * @requires OpenLayers/Handler/Click.js
 * @requires OpenLayers/Filter/Spatial.js
 * @requires OpenLayers/Format/SLD/v1_0_0.js
 */

/**
 * Class: OpenLayers.Control.SLDSelect
 * Perform selections on WMS layers using Styled Layer Descriptor (SLD)
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.SLDSelect = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * selected - Triggered when a selection occurs.  Listeners receive an 
     *     event with *filters* and *layer* properties.  Filters will be an 
     *     array of OpenLayers.Filter objects created in order to perform 
     *     the particular selection.
     */

    /**
     * APIProperty: clearOnDeactivate
     * {Boolean} Should the selection be cleared when the control is 
     *     deactivated. Default value is false.
     */
    clearOnDeactivate: false,

    /**
     * APIProperty: layers
     * {Array(<OpenLayers.Layer.WMS>)} The WMS layers this control will work 
     *     on.
     */
    layers: null,

    /**
     * Property: callbacks
     * {Object} The functions that are sent to the handler for callback
     */
    callbacks: null,

    /**
     * APIProperty: selectionSymbolizer
     * {Object} Determines the styling of the selected objects. Default is
     *     a selection in red.
     */
    selectionSymbolizer: {
        'Polygon': {fillColor: '#FF0000', stroke: false},
        'Line': {strokeColor: '#FF0000', strokeWidth: 2},
        'Point': {graphicName: 'square', fillColor: '#FF0000', pointRadius: 5}
    },

    /**
     * APIProperty: layerOptions
     * {Object} The options to apply to the selection layer, by default the
     *     selection layer will be kept out of the layer switcher.
     */
    layerOptions: null,

    /**
     * APIProperty: handlerOptions
     * {Object} Used to set non-default properties on the control's handler
     */
    handlerOptions: null,

    /**
     * APIProperty: sketchStyle
     * {<OpenLayers.Style>|Object} Style or symbolizer to use for the sketch
     * handler. The recommended way of styling the sketch layer, however, is
     * to configure an <OpenLayers.StyleMap> in the layerOptions of the
     * <handlerOptions>:
     * 
     * (code)
     * new OpenLayers.Control.SLDSelect(OpenLayers.Handler.Path, {
     *     handlerOptions: {
     *         layerOptions: {
     *             styleMap: new OpenLayers.StyleMap({
     *                 "default": {strokeColor: "yellow"}
     *             });
     *         }
     *     }
     * });
     * (end)
     */
    sketchStyle: null,

    /**
     * APIProperty: wfsCache
     * {Object} Cache to use for storing parsed results from
     *     <OpenLayers.Format.WFSDescribeFeatureType.read>. If not provided,
     *     these will be cached on the prototype.
     */
    wfsCache: {},

    /**
     * APIProperty: layerCache
     * {Object} Cache to use for storing references to the selection layers.
     *     Normally each source layer will have exactly 1 selection layer of
     *     type OpenLayers.Layer.WMS. If not provided, layers will
     *     be cached on the prototype. Note that if <clearOnDeactivate> is
     *     true, the layer will no longer be cached after deactivating the
     *     control.
     */
    layerCache: {},

    /**
     * Constructor: OpenLayers.Control.SLDSelect
     * Create a new control for selecting features in WMS layers using
     *     Styled Layer Descriptor (SLD).
     *
     * Parameters:
     * handler - {<OpenLayers.Class>} A sketch handler class. This determines
     *     the type of selection, e.g. box (<OpenLayers.Handler.Box>), point
     *     (<OpenLayers.Handler.Point>), path (<OpenLayers.Handler.Path>) or
     *     polygon (<OpenLayers.Handler.Polygon>) selection. To use circle
     *     type selection, use <OpenLayers.Handler.RegularPolygon> and pass
     *     the number of desired sides (e.g. 40) as "sides" property to the
     *     <handlerOptions>.
     * options - {Object} An object containing all configuration properties for
     *     the control.
     *
     * Valid options:
     * layers - Array({<OpenLayers.Layer.WMS>}) The layers to perform the
     *     selection on.
     */
    initialize: function(handler, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);

        this.callbacks = OpenLayers.Util.extend({done: this.select, 
            click: this.select}, this.callbacks);
        this.handlerOptions = this.handlerOptions || {};
        this.layerOptions = OpenLayers.Util.applyDefaults(this.layerOptions, {
            displayInLayerSwitcher: false,
            tileOptions: {maxGetUrlLength: 2048}
        });
        if (this.sketchStyle) {
            this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults(
                this.handlerOptions.layerOptions,
                {styleMap: new OpenLayers.StyleMap({"default": this.sketchStyle})}
            );
        }
        this.handler = new handler(this, this.callbacks, this.handlerOptions);
    },

    /**
     * APIMethod: destroy
     * Take care of things that are not handled in superclass.
     */
    destroy: function() {
        for (var key in this.layerCache) {
            delete this.layerCache[key];
        }
        for (var key in this.wfsCache) {
            delete this.wfsCache[key];
        }
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },

    /**
     * Method: coupleLayerVisiblity
     * Couple the selection layer and the source layer with respect to
     *     layer visibility. So if the source layer is turned off, the
     *     selection layer is also turned off.
     *
     * Context: 
     * - {<OpenLayers.Layer>}
     *
     * Parameters:
     * evt - {Object}
     */
    coupleLayerVisiblity: function(evt) {
        this.setVisibility(evt.object.getVisibility());
    },

    /**
     * Method: createSelectionLayer
     * Creates a "clone" from the source layer in which the selection can
     * be drawn. This ensures both the source layer and the selection are 
     * visible and not only the selection.
     *
     * Parameters:
     * source - {<OpenLayers.Layer.WMS>} The source layer on which the selection
     *     is performed.
     *
     * Returns:
     * {<OpenLayers.Layer.WMS>} A WMS layer with maxGetUrlLength configured to 2048
     *     since SLD selections can easily get quite long.
     */
    createSelectionLayer: function(source) {
        // check if we already have a selection layer for the source layer
        var selectionLayer;
        if (!this.layerCache[source.id]) {
            selectionLayer = new OpenLayers.Layer.WMS(source.name, 
                source.url, source.params, 
                OpenLayers.Util.applyDefaults(
                    this.layerOptions,
                    source.getOptions())
            );
            this.layerCache[source.id] = selectionLayer;
            // make sure the layers are coupled wrt visibility, but only
            // if they are not displayed in the layer switcher, because in
            // that case the user cannot control visibility.
            if (this.layerOptions.displayInLayerSwitcher === false) {
                source.events.on({
                    "visibilitychanged": this.coupleLayerVisiblity,
                    scope: selectionLayer});
            }
            this.map.addLayer(selectionLayer);
        } else {
            selectionLayer = this.layerCache[source.id];
        }
        return selectionLayer;
    },

    /**
     * Method: createSLD
     * Create the SLD document for the layer using the supplied filters.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.WMS>}
     * filters - Array({<OpenLayers.Filter>}) The filters to be applied.
     * geometryAttributes - Array({Object}) The geometry attributes of the 
     *     layer.
     *
     * Returns:
     * {String} The SLD document generated as a string.
     */
    createSLD: function(layer, filters, geometryAttributes) {
        var sld = {version: "1.0.0", namedLayers: {}};
        var layerNames = [layer.params.LAYERS].join(",").split(",");
        for (var i=0, len=layerNames.length; i<len; i++) { 
            var name = layerNames[i];
            sld.namedLayers[name] = {name: name, userStyles: []};
            var symbolizer = this.selectionSymbolizer;
            var geometryAttribute = geometryAttributes[i];
            if (geometryAttribute.type.indexOf('Polygon') >= 0) {
                symbolizer = {Polygon: this.selectionSymbolizer['Polygon']};
            } else if (geometryAttribute.type.indexOf('LineString') >= 0) {
                symbolizer = {Line: this.selectionSymbolizer['Line']};
            } else if (geometryAttribute.type.indexOf('Point') >= 0) {
                symbolizer = {Point: this.selectionSymbolizer['Point']};
            }
            var filter = filters[i];
            sld.namedLayers[name].userStyles.push({name: 'default', rules: [
                new OpenLayers.Rule({symbolizer: symbolizer, 
                    filter: filter, 
                    maxScaleDenominator: layer.options.minScale})
            ]});
        }
        return new OpenLayers.Format.SLD({srsName: this.map.getProjection()}).write(sld);
    },

    /**
     * Method: parseDescribeLayer
     * Parse the SLD WMS DescribeLayer response and issue the corresponding
     *     WFS DescribeFeatureType request
     *
     * request - {XMLHttpRequest} The request object.
     */
    parseDescribeLayer: function(request) {
        var format = new OpenLayers.Format.WMSDescribeLayer();
        var doc = request.responseXML;
        if(!doc || !doc.documentElement) {
            doc = request.responseText;
        }
        var describeLayer = format.read(doc);
        var typeNames = [];
        var url = null;
        for (var i=0, len=describeLayer.length; i<len; i++) {
            // perform a WFS DescribeFeatureType request
            if (describeLayer[i].owsType == "WFS") {
                typeNames.push(describeLayer[i].typeName);
                url = describeLayer[i].owsURL;
            }
        }
        var options = {
            url: url,
            params: {
                SERVICE: "WFS",
                TYPENAME: typeNames.toString(),
                REQUEST: "DescribeFeatureType",
                VERSION: "1.0.0"
            },
            callback: function(request) {
                var format = new OpenLayers.Format.WFSDescribeFeatureType();
                var doc = request.responseXML;
                if(!doc || !doc.documentElement) {
                    doc = request.responseText;
                }
                var describeFeatureType = format.read(doc);
                this.control.wfsCache[this.layer.id] = describeFeatureType;
                this.control._queue && this.control.applySelection();
            },
            scope: this
        };
        OpenLayers.Request.GET(options);
    },

   /**
    * Method: getGeometryAttributes
    * Look up the geometry attributes from the WFS DescribeFeatureType response
    *
    * Parameters:
    * layer - {<OpenLayers.Layer.WMS>} The layer for which to look up the 
    *     geometry attributes.
    *
    * Returns:
    * Array({Object}) Array of geometry attributes
    */ 
   getGeometryAttributes: function(layer) {
        var result = [];
        var cache = this.wfsCache[layer.id];
        for (var i=0, len=cache.featureTypes.length; i<len; i++) {
            var typeName = cache.featureTypes[i];
            var properties = typeName.properties;
            for (var j=0, lenj=properties.length; j < lenj; j++) {
                var property = properties[j];
                var type = property.type;
                if ((type.indexOf('LineString') >= 0) ||
                    (type.indexOf('GeometryAssociationType') >=0) ||
                    (type.indexOf('GeometryPropertyType') >= 0) ||
                    (type.indexOf('Point') >= 0) ||
                    (type.indexOf('Polygon') >= 0) ) {
                        result.push(property);
                }
            }
        }
        return result;
    },

    /**
     * APIMethod: activate
     * Activate the control. Activating the control will perform a SLD WMS
     *     DescribeLayer request followed by a WFS DescribeFeatureType request
     *     so that the proper symbolizers can be chosen based on the geometry
     *     type.
     */
    activate: function() {
        var activated = OpenLayers.Control.prototype.activate.call(this);
        if(activated) {
            for (var i=0, len=this.layers.length; i<len; i++) {
                var layer = this.layers[i];
                if (layer && !this.wfsCache[layer.id]) {
                    var options = {
                        url: layer.url,
                        params: {
                            SERVICE: "WMS",
                            VERSION: layer.params.VERSION,
                            LAYERS: layer.params.LAYERS,
                            REQUEST: "DescribeLayer"
                        },
                        callback: this.parseDescribeLayer,
                        scope: {layer: layer, control: this}
                    };
                    OpenLayers.Request.GET(options);
                }
            }
        }
        return activated;
    },

    /**
     * APIMethod: deactivate
     * Deactivate the control. If clearOnDeactivate is true, remove the
     *     selection layer(s).
     */
    deactivate: function() {
        var deactivated = OpenLayers.Control.prototype.deactivate.call(this);
        if(deactivated) {
            for (var i=0, len=this.layers.length; i<len; i++) {
                var layer = this.layers[i];
                if (layer && this.clearOnDeactivate === true) {
                    var layerCache = this.layerCache;
                    var selectionLayer = layerCache[layer.id];
                    if (selectionLayer) {
                        layer.events.un({
                            "visibilitychanged": this.coupleLayerVisiblity,
                            scope: selectionLayer});
                        selectionLayer.destroy();
                        delete layerCache[layer.id];
                    }
                }
            }
        }
        return deactivated;
    },

    /**
     * APIMethod: setLayers
     * Set the layers on which the selection should be performed.  Call the 
     *     setLayers method if the layer(s) to be used change and the same 
     *     control should be used on a new set of layers.
     *     If the control is already active, it will be active after the new
     *     set of layers is set.
     *
     * Parameters:
     * layers - {Array(<OpenLayers.Layer.WMS>)}  The new set of layers on which 
     *     the selection should be performed.
     */
    setLayers: function(layers) {
        if(this.active) {
            this.deactivate();
            this.layers = layers;
            this.activate();
        } else {
            this.layers = layers;
        }
    },

    /**
     * Function: createFilter
     * Create the filter to be used in the SLD.
     *
     * Parameters:
     * geometryAttribute - {Object} Used to get the name of the geometry 
     *     attribute which is needed for constructing the spatial filter.
     * geometry - {<OpenLayers.Geometry>} The geometry to use.
     *
     * Returns:
     * {<OpenLayers.Filter.Spatial>} The spatial filter created.
     */
    createFilter: function(geometryAttribute, geometry) {
        var filter = null;
        if (this.handler instanceof OpenLayers.Handler.RegularPolygon) {
            // box
            if (this.handler.irregular === true) {
                filter = new OpenLayers.Filter.Spatial({
                    type: OpenLayers.Filter.Spatial.BBOX,
                    property: geometryAttribute.name,
                    value: geometry.getBounds()}
                );
            } else {
                filter = new OpenLayers.Filter.Spatial({
                    type: OpenLayers.Filter.Spatial.INTERSECTS,
                    property: geometryAttribute.name,
                    value: geometry}
                );
            }
        } else if (this.handler instanceof OpenLayers.Handler.Polygon) {
            filter = new OpenLayers.Filter.Spatial({
                type: OpenLayers.Filter.Spatial.INTERSECTS,
                property: geometryAttribute.name,
                value: geometry}
            );
        } else if (this.handler instanceof OpenLayers.Handler.Path) {
            // if source layer is point based, use DWITHIN instead
            if (geometryAttribute.type.indexOf('Point') >= 0) {
                filter = new OpenLayers.Filter.Spatial({
                    type: OpenLayers.Filter.Spatial.DWITHIN,
                    property: geometryAttribute.name,
                    distance: this.map.getExtent().getWidth()*0.01 ,
                    distanceUnits: this.map.getUnits(),
                    value: geometry}
                );
            } else {
                filter = new OpenLayers.Filter.Spatial({
                    type: OpenLayers.Filter.Spatial.INTERSECTS,
                    property: geometryAttribute.name,
                    value: geometry}
                );
            }
        } else if (this.handler instanceof OpenLayers.Handler.Click) {
            if (geometryAttribute.type.indexOf('Polygon') >= 0) {
                filter = new OpenLayers.Filter.Spatial({
                    type: OpenLayers.Filter.Spatial.INTERSECTS,
                    property: geometryAttribute.name,
                    value: geometry}
                );
            } else {
                filter = new OpenLayers.Filter.Spatial({
                    type: OpenLayers.Filter.Spatial.DWITHIN,
                    property: geometryAttribute.name,
                    distance: this.map.getExtent().getWidth()*0.01 ,
                    distanceUnits: this.map.getUnits(),
                    value: geometry}
                );
            }
        }
        return filter;
    },

    /**
     * Method: select
     * When the handler is done, use SLD_BODY on the selection layer to
     *     display the selection in the map.
     *
     * Parameters:
     * geometry - {Object} or {<OpenLayers.Geometry>}
     */
    select: function(geometry) {
        this._queue = function() {
            for (var i=0, len=this.layers.length; i<len; i++) {
                var layer = this.layers[i];
                var geometryAttributes = this.getGeometryAttributes(layer);
                var filters = [];
                for (var j=0, lenj=geometryAttributes.length; j<lenj; j++) {
                    var geometryAttribute = geometryAttributes[j];
                    if (geometryAttribute !== null) {
                        // from the click handler we will not get an actual 
                        // geometry so transform
                        if (!(geometry instanceof OpenLayers.Geometry)) {
                            var point = this.map.getLonLatFromPixel(
                                geometry.xy);
                            geometry = new OpenLayers.Geometry.Point(
                                point.lon, point.lat);
                        }
                        var filter = this.createFilter(geometryAttribute,
                        geometry);
                        if (filter !== null) {
                            filters.push(filter);
                        }
                    }
                }
    
                var selectionLayer = this.createSelectionLayer(layer);
                var sld = this.createSLD(layer, filters, geometryAttributes);
    
                this.events.triggerEvent("selected", {
                    layer: layer,
                    filters: filters
                });
    
                selectionLayer.mergeNewParams({SLD_BODY: sld});
                delete this._queue;
            }
        };
        this.applySelection();
    },
    
    /**
     * Method: applySelection
     * Checks if all required wfs data is cached, and applies the selection
     */
    applySelection: function() {
        var canApply = true;
        for (var i=0, len=this.layers.length; i<len; i++) {
            if(!this.wfsCache[this.layers[i].id]) {
                canApply = false;
                break;
            }
        }
        canApply && this._queue.call(this);
    },

    CLASS_NAME: "OpenLayers.Control.SLDSelect"
});
/* ======================================================================
    OpenLayers/Control/Scale.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Class: OpenLayers.Control.Scale
 * The Scale control displays the current map scale as a ratio (e.g. Scale = 
 * 1:1M). By default it is displayed in the lower right corner of the map.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Scale = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * Property: element
     * {DOMElement}
     */
    element: null,
    
    /**
     * APIProperty: geodesic
     * {Boolean} Use geodesic measurement. Default is false. The recommended
     * setting for maps in EPSG:4326 is false, and true EPSG:900913. If set to
     * true, the scale will be calculated based on the horizontal size of the
     * pixel in the center of the map viewport.
     */
    geodesic: false,

    /**
     * Constructor: OpenLayers.Control.Scale
     * 
     * Parameters:
     * element - {DOMElement} 
     * options - {Object} 
     */
    initialize: function(element, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.element = OpenLayers.Util.getElement(element);        
    },

    /**
     * Method: draw
     * 
     * Returns:
     * {DOMElement}
     */    
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        if (!this.element) {
            this.element = document.createElement("div");
            this.div.appendChild(this.element);
        }
        this.map.events.register( 'moveend', this, this.updateScale);
        this.updateScale();
        return this.div;
    },
   
    /**
     * Method: updateScale
     */
    updateScale: function() {
        var scale;
        if(this.geodesic === true) {
            var units = this.map.getUnits();
            if(!units) {
                return;
            }
            var inches = OpenLayers.INCHES_PER_UNIT;
            scale = (this.map.getGeodesicPixelSize().w || 0.000001) *
                    inches["km"] * OpenLayers.DOTS_PER_INCH;
        } else {
            scale = this.map.getScale();
        }
            
        if (!scale) {
            return;
        }

        if (scale >= 9500 && scale <= 950000) {
            scale = Math.round(scale / 1000) + "K";
        } else if (scale >= 950000) {
            scale = Math.round(scale / 1000000) + "M";
        } else {
            scale = Math.round(scale);
        }    
        
        this.element.innerHTML = OpenLayers.i18n("Scale = 1 : ${scaleDenom}", {'scaleDenom':scale});
    }, 

    CLASS_NAME: "OpenLayers.Control.Scale"
});

/* ======================================================================
    OpenLayers/Control/Button.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.Button 
 * The Button control is a very simple push-button, for use with 
 * <OpenLayers.Control.Panel>.
 * When clicked, the function trigger() is executed.
 * 
 * Inherits from:
 *  - <OpenLayers.Control>
 *
 * Use:
 * (code)
 * var button = new OpenLayers.Control.Button({
 *     displayClass: "MyButton", trigger: myFunction
 * });
 * panel.addControls([button]);
 * (end)
 * 
 * Will create a button with CSS class MyButtonItemInactive, that
 *     will call the function MyFunction() when clicked.
 */
OpenLayers.Control.Button = OpenLayers.Class(OpenLayers.Control, {
    /**
     * Property: type
     * {Integer} OpenLayers.Control.TYPE_BUTTON.
     */
    type: OpenLayers.Control.TYPE_BUTTON,
    
    /**
     * Method: trigger
     * Called by a control panel when the button is clicked.
     */
    trigger: function() {},

    CLASS_NAME: "OpenLayers.Control.Button"
});
/* ======================================================================
    OpenLayers/Layer/MapGuide.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Request/XMLHttpRequest.js
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.MapGuide
 * Instances of OpenLayers.Layer.MapGuide are used to display
 * data from a MapGuide OS instance.
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.MapGuide = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /** 
     * APIProperty: isBaseLayer
     * {Boolean} Treat this layer as a base layer.  Default is true.
     **/
    isBaseLayer: true,
    
    /**
     * APIProperty: useHttpTile
     * {Boolean} use a tile cache exposed directly via a webserver rather than the 
     *    via mapguide server. This does require extra configuration on the Mapguide Server,
     *    and will only work when singleTile is false. The url for the layer must be set to the
     *    webserver path rather than the Mapguide mapagent.
     *    See http://trac.osgeo.org/mapguide/wiki/CodeSamples/Tiles/ServingTilesViaHttp
     **/
    useHttpTile: false,
    
    /** 
     * APIProperty: singleTile
     * {Boolean} use tile server or request single tile image. 
     **/
    singleTile: false,
    
    /** 
     * APIProperty: useOverlay
     * {Boolean} flag to indicate if the layer should be retrieved using
     * GETMAPIMAGE (default) or using GETDYNAMICOVERLAY requests.
     **/
    useOverlay: false,
    
    /** 
     * APIProperty: useAsyncOverlay
     * {Boolean} indicates if the MapGuide site supports the asynchronous 
     * GETDYNAMICOVERLAY requests which is available in MapGuide Enterprise 2010
     * and MapGuide Open Source v2.0.3 or higher. The newer versions of MG 
     * is called asynchronously, allows selections to be drawn separately from 
     * the map and offers styling options.
     * 
     * With older versions of MapGuide, set useAsyncOverlay=false.  Note that in
     * this case a synchronous AJAX call is issued and the mapname and session
     * parameters must be used to initialize the layer, not the mapdefinition
     * parameter. Also note that this will issue a synchronous AJAX request 
     * before the image request can be issued so the users browser may lock
     * up if the MG Web tier does not respond in a timely fashion.
     **/
    useAsyncOverlay: true,
    
    /**
     * Constant: TILE_PARAMS
     * {Object} Hashtable of default parameter key/value pairs for tiled layer
     */
    TILE_PARAMS: {
         operation: 'GETTILEIMAGE',
         version: '1.2.0'
    },

    /**
     * Constant: SINGLE_TILE_PARAMS
     * {Object} Hashtable of default parameter key/value pairs for untiled layer
     */
    SINGLE_TILE_PARAMS: {
        operation: 'GETMAPIMAGE',
        format: 'PNG',
        locale: 'en',
        clip: '1',
        version: '1.0.0'
    },
    
    /**
     * Constant: OVERLAY_PARAMS
     * {Object} Hashtable of default parameter key/value pairs for untiled layer
     */
    OVERLAY_PARAMS: {
        operation: 'GETDYNAMICMAPOVERLAYIMAGE',
        format: 'PNG',
        locale: 'en',
        clip: '1',
        version: '2.0.0'
    },
    
    /** 
     * Constant: FOLDER_PARAMS
     * {Object} Hashtable of parameter key/value pairs which describe 
     * the folder structure for tiles as configured in the mapguide 
     * serverconfig.ini section [TileServiceProperties]
     */
    FOLDER_PARAMS: {
        tileColumnsPerFolder: 30,
        tileRowsPerFolder: 30,
        format: 'png',
        querystring: null
    },	

    /** 
     * Property: defaultSize
     * {<OpenLayers.Size>} Tile size as produced by MapGuide server
     **/
    defaultSize: new OpenLayers.Size(300,300),

    /** 
     * Property: tileOriginCorner
     * {String} MapGuide tile server uses top-left as tile origin
     **/
    tileOriginCorner: "tl",

    /**
     * Constructor: OpenLayers.Layer.MapGuide
     * Create a new Mapguide layer, either tiled or untiled.  
     *
     * For tiled layers, the 'groupName' and 'mapDefinition' values 
     * must be specified as parameters in the constructor.
     *
     * For untiled base layers, specify either combination of 'mapName' and
     * 'session', or 'mapDefinition' and 'locale'.  
     *
     * For older versions of MapGuide and overlay layers, set useAsyncOverlay 
     * to false and in this case mapName and session are required parameters 
     * for the constructor.
     *
     * NOTE: MapGuide OS uses a DPI value and degrees to meters conversion 
     * factor that are different than the defaults used in OpenLayers, 
     * so these must be adjusted accordingly in your application.  
     * See the MapGuide example for how to set these values for MGOS.
     *
     * Parameters:
     * name - {String} Name of the layer displayed in the interface
     * url - {String} Location of the MapGuide mapagent executable
     *            (e.g. http://localhost:8008/mapguide/mapagent/mapagent.fcgi)
     * params - {Object} hashtable of additional parameters to use. Some
     *     parameters may require additional code on the server. The ones that
     *     you may want to use are: 
     *   - mapDefinition - {String} The MapGuide resource definition
     *            (e.g. Library://Samples/Gmap/Maps/gmapTiled.MapDefinition)
     *   - locale - Locale setting 
     *            (for untiled overlays layers only)
     *   - mapName - {String} Name of the map as stored in the MapGuide session.
     *          (for untiled layers with a session parameter only)
     *   - session - { String} MapGuide session ID 
     *            (for untiled overlays layers only)
     *   - basemaplayergroupname - {String} GroupName for tiled MapGuide layers only
     *   - format - Image format to be returned (for untiled overlay layers only)
     *   - showLayers - {String} A comma separated list of GUID's for the
     *       layers to display eg: 'cvc-xcv34,453-345-345sdf'.
     *   - hideLayers - {String} A comma separated list of GUID's for the
     *       layers to hide eg: 'cvc-xcv34,453-345-345sdf'.
     *   - showGroups - {String} A comma separated list of GUID's for the
     *       groups to display eg: 'cvc-xcv34,453-345-345sdf'.
     *   - hideGroups - {String} A comma separated list of GUID's for the
     *       groups to hide eg: 'cvc-xcv34,453-345-345sdf'
     *   - selectionXml - {String} A selection xml string Some server plumbing
     *       is required to read such a value.
     * options - {Object} Hashtable of extra options to tag onto the layer; 
     *          will vary depending if tiled or untiled maps are being requested
     */
    initialize: function(name, url, params, options) {
        
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, arguments);
        
        // unless explicitly set in options, if the layer is transparent, 
        // it will be an overlay
        if (options == null || options.isBaseLayer == null) {
            this.isBaseLayer = ((this.transparent != "true") && 
                                (this.transparent != true));
        }

        if (options && options.useOverlay!=null) {
          this.useOverlay = options.useOverlay;
        }
        
        //initialize for untiled layers
        if (this.singleTile) {
          if (this.useOverlay) {
            OpenLayers.Util.applyDefaults(
                           this.params,
                           this.OVERLAY_PARAMS
                           );
            if (!this.useAsyncOverlay) {
              this.params.version = "1.0.0";
            }
          } else {
            OpenLayers.Util.applyDefaults(
                           this.params,
                           this.SINGLE_TILE_PARAMS
                           );
          }         
        } else {
            //initialize for tiled layers
            if (this.useHttpTile) {
                OpenLayers.Util.applyDefaults(
                               this.params,
                               this.FOLDER_PARAMS
                               );
            } else {
                OpenLayers.Util.applyDefaults(
                               this.params,
                               this.TILE_PARAMS
                               );
            }
            this.setTileSize(this.defaultSize); 
        }
    },

    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Returns:
     * {<OpenLayers.Layer.MapGuide>} An exact clone of this layer
     */
    clone: function (obj) {
      if (obj == null) {
            obj = new OpenLayers.Layer.MapGuide(this.name,
                                           this.url,
                                           this.params,
                                           this.getOptions());
      }
      //get all additions from superclasses
      obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

      return obj;
    },

    /**
     * Method: getURL
     * Return a query string for this layer
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox 
     *                                for the request
     *
     * Returns:
     * {String} A string with the layer's url and parameters and also 
     *          the passed-in bounds and appropriate tile size specified 
     *          as parameters.
     */
    getURL: function (bounds) {
        var url;
        var center = bounds.getCenterLonLat();
        var mapSize = this.map.getSize();

        if (this.singleTile) {
          //set up the call for GETMAPIMAGE or GETDYNAMICMAPOVERLAY with
          //dynamic map parameters
          var params = {
            setdisplaydpi: OpenLayers.DOTS_PER_INCH,
            setdisplayheight: mapSize.h*this.ratio,
            setdisplaywidth: mapSize.w*this.ratio,
            setviewcenterx: center.lon,
            setviewcentery: center.lat,
            setviewscale: this.map.getScale()
          };
          
          if (this.useOverlay && !this.useAsyncOverlay) {
            //first we need to call GETVISIBLEMAPEXTENT to set the extent
            var getVisParams = {};
            getVisParams = OpenLayers.Util.extend(getVisParams, params);
            getVisParams.operation = "GETVISIBLEMAPEXTENT";
            getVisParams.version = "1.0.0";
            getVisParams.session = this.params.session;
            getVisParams.mapName = this.params.mapName;
            getVisParams.format = 'text/xml';
            url = this.getFullRequestString( getVisParams );
            
            OpenLayers.Request.GET({url: url, async: false});
          }
          //construct the full URL
          url = this.getFullRequestString( params );
        } else {

          //tiled version
          var currentRes = this.map.getResolution();
          var colidx = Math.floor((bounds.left-this.maxExtent.left)/currentRes);
          colidx = Math.round(colidx/this.tileSize.w);
          var rowidx = Math.floor((this.maxExtent.top-bounds.top)/currentRes);
          rowidx = Math.round(rowidx/this.tileSize.h);

          if (this.useHttpTile){
	          url = this.getImageFilePath(
                   {
                       tilecol: colidx,
                       tilerow: rowidx,
                       scaleindex: this.resolutions.length - this.map.zoom - 1
                    });
		  
          } else {
            url = this.getFullRequestString(
                   {
                       tilecol: colidx,
                       tilerow: rowidx,
                       scaleindex: this.resolutions.length - this.map.zoom - 1
                    });
          }
       }
       return url;
    },

    /**
     * Method: getFullRequestString
     * getFullRequestString on MapGuide layers is special, because we 
     * do a regular expression replace on ',' in parameters to '+'.
     * This is why it is subclassed here.
     *
     * Parameters:
     * altUrl - {String} Alternative base URL to use.
     *
     * Returns:
     * {String} A string with the layer's url appropriately encoded for MapGuide
     */
    getFullRequestString:function(newParams, altUrl) {
        // use layer's url unless altUrl passed in
        var url = (altUrl == null) ? this.url : altUrl;
        
        // if url is not a string, it should be an array of strings, 
        //  in which case we will randomly select one of them in order
        //  to evenly distribute requests to different urls.
        if (typeof url == "object") {
            url = url[Math.floor(Math.random()*url.length)];
        }   
        // requestString always starts with url
        var requestString = url;        

        // create a new params hashtable with all the layer params and the 
        // new params together. then convert to string
        var allParams = OpenLayers.Util.extend({}, this.params);
        allParams = OpenLayers.Util.extend(allParams, newParams);
        // ignore parameters that are already in the url search string
        var urlParams = OpenLayers.Util.upperCaseObject(
                            OpenLayers.Util.getParameters(url));
        for(var key in allParams) {
            if(key.toUpperCase() in urlParams) {
                delete allParams[key];
            }
        }
        var paramsString = OpenLayers.Util.getParameterString(allParams);
        
        /* MapGuide needs '+' seperating things like bounds/height/width.
           Since typically this is URL encoded, we use a slight hack: we
           depend on the list-like functionality of getParameterString to
           leave ',' only in the case of list items (since otherwise it is
           encoded) then do a regular expression replace on the , characters
           to '+' */
        paramsString = paramsString.replace(/,/g, "+");
        
        if (paramsString != "") {
            var lastServerChar = url.charAt(url.length - 1);
            if ((lastServerChar == "&") || (lastServerChar == "?")) {
                requestString += paramsString;
            } else {
                if (url.indexOf('?') == -1) {
                    //serverPath has no ? -- add one
                    requestString += '?' + paramsString;
                } else {
                    //serverPath contains ?, so must already have paramsString at the end
                    requestString += '&' + paramsString;
                }
            }
        }
        return requestString;
    },

     /** 
     * Method: getImageFilePath
     * special handler to request mapguide tiles from an http exposed tilecache 
     *
     * Parameters:
     * altUrl - {String} Alternative base URL to use.
     *
     * Returns:
     * {String} A string with the url for the tile image
     */
    getImageFilePath:function(newParams, altUrl) {
        // use layer's url unless altUrl passed in
        var url = (altUrl == null) ? this.url : altUrl;
        
        // if url is not a string, it should be an array of strings, 
        //  in which case we will randomly select one of them in order
        //  to evenly distribute requests to different urls.
        if (typeof url == "object") {
            url = url[Math.floor(Math.random()*url.length)];
        }   
        // requestString always starts with url
        var requestString = url;        

        var tileRowGroup = "";
        var tileColGroup = "";
        
        if (newParams.tilerow < 0) {
          tileRowGroup =  '-';
        }
          
        if (newParams.tilerow == 0 ) {
          tileRowGroup += '0';
        } else {
          tileRowGroup += Math.floor(Math.abs(newParams.tilerow/this.params.tileRowsPerFolder)) * this.params.tileRowsPerFolder;
        }
          
        if (newParams.tilecol < 0) {
          tileColGroup =  '-';
        }
        
        if (newParams.tilecol == 0) {
          tileColGroup += '0';
        } else {
          tileColGroup += Math.floor(Math.abs(newParams.tilecol/this.params.tileColumnsPerFolder)) * this.params.tileColumnsPerFolder;
        }					
        
        var tilePath = '/S' + Math.floor(newParams.scaleindex)
                + '/' + this.params.basemaplayergroupname
                + '/R' + tileRowGroup
                + '/C' + tileColGroup
                + '/' + (newParams.tilerow % this.params.tileRowsPerFolder) 
                + '_' + (newParams.tilecol % this.params.tileColumnsPerFolder) 
                + '.' + this.params.format;
    
        if (this.params.querystring) {
               tilePath += "?" + this.params.querystring;
        }
        
        requestString += tilePath;
        return requestString;
    },
    
    /** 
     * Method: calculateGridLayout
     * Generate parameters for the grid layout. This  
     *
     * Parameters:
     * bounds - {<OpenLayers.Bound>}
     * origin - {<OpenLayers.LonLat>}
     * resolution - {Number}
     *
     * Returns:
     * {Object} Object containing properties tilelon, tilelat, tileoffsetlat,
     * tileoffsetlat, tileoffsetx, tileoffsety
     */
    calculateGridLayout: function(bounds, origin, resolution) {
        var tilelon = resolution * this.tileSize.w;
        var tilelat = resolution * this.tileSize.h;
        
        var offsetlon = bounds.left - origin.lon;
        var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
        var tilecolremain = offsetlon/tilelon - tilecol;
        var tileoffsetx = -tilecolremain * this.tileSize.w;
        var tileoffsetlon = origin.lon + tilecol * tilelon;
        
        var offsetlat = origin.lat - bounds.top + tilelat; 
        var tilerow = Math.floor(offsetlat/tilelat) - this.buffer;
        var tilerowremain = tilerow - offsetlat/tilelat;
        var tileoffsety = tilerowremain * this.tileSize.h;
        var tileoffsetlat = origin.lat - tilelat*tilerow;
        
        return { 
          tilelon: tilelon, tilelat: tilelat,
          tileoffsetlon: tileoffsetlon, tileoffsetlat: tileoffsetlat,
          tileoffsetx: tileoffsetx, tileoffsety: tileoffsety
        };
    },
    
    CLASS_NAME: "OpenLayers.Layer.MapGuide"
});
/* ======================================================================
    OpenLayers/Control/Measure.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Feature/Vector.js
 */

/**
 * Class: OpenLayers.Control.Measure
 * Allows for drawing of features for measurements.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Measure = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * measure - Triggered when a measurement sketch is complete.  Listeners
     *      will receive an event with measure, units, order, and geometry
     *      properties.
     * measurepartial - Triggered when a new point is added to the
     *      measurement sketch or if the <immediate> property is true and the
     *      measurement sketch is modified.  Listeners receive an event with measure,
     *      units, order, and geometry.
     */

    /**
     * APIProperty: handlerOptions
     * {Object} Used to set non-default properties on the control's handler
     */
    handlerOptions: null,
    
    /**
     * Property: callbacks
     * {Object} The functions that are sent to the handler for callback
     */
    callbacks: null,
    
    /**
     * Property: displaySystem
     * {String} Display system for output measurements.  Supported values
     *     are 'english', 'metric', and 'geographic'.  Default is 'metric'.
     */
    displaySystem: 'metric',
    
    /**
     * Property: geodesic
     * {Boolean} Calculate geodesic metrics instead of planar metrics.  This
     *     requires that geometries can be transformed into Geographic/WGS84
     *     (if that is not already the map projection).  Default is false.
     */
    geodesic: false,
    
    /**
     * Property: displaySystemUnits
     * {Object} Units for various measurement systems.  Values are arrays
     *     of unit abbreviations (from OpenLayers.INCHES_PER_UNIT) in decreasing
     *     order of length.
     */
    displaySystemUnits: {
        geographic: ['dd'],
        english: ['mi', 'ft', 'in'],
        metric: ['km', 'm']
    },

    /**
     * Property: delay
     * {Number} Number of milliseconds between clicks before the event is
     *     considered a double-click.  The "measurepartial" event will not
     *     be triggered if the sketch is completed within this time.  This
     *     is required for IE where creating a browser reflow (if a listener
     *     is modifying the DOM by displaying the measurement values) messes
     *     with the dblclick listener in the sketch handler.
     */
    partialDelay: 300,

    /**
     * Property: delayedTrigger
     * {Number} Timeout id of trigger for measurepartial.
     */
    delayedTrigger: null,

    /**
     * APIProperty: persist
     * {Boolean} Keep the temporary measurement sketch drawn after the
     *     measurement is complete.  The geometry will persist until a new
     *     measurement is started, the control is deactivated, or <cancel> is
     *     called.
     */
    persist: false,

    /**
     * APIProperty: immediate
     * {Boolean} Activates the immediate measurement so that the "measurepartial"
     *     event is also fired once the measurement sketch is modified.
     *     Default is false.
     */
    immediate : false,

    /**
     * Constructor: OpenLayers.Control.Measure
     * 
     * Parameters:
     * handler - {<OpenLayers.Handler>} 
     * options - {Object} 
     */
    initialize: function(handler, options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        var callbacks = {done: this.measureComplete,
            point: this.measurePartial};
        if (this.immediate){
            callbacks.modify = this.measureImmediate;
        }
        this.callbacks = OpenLayers.Util.extend(callbacks, this.callbacks);

        // let the handler options override, so old code that passes 'persist' 
        // directly to the handler does not need an update
        this.handlerOptions = OpenLayers.Util.extend(
            {persist: this.persist}, this.handlerOptions
        );
        this.handler = new handler(this, this.callbacks, this.handlerOptions);
    },
    
    /**
     * APIMethod: deactivate
     */
    deactivate: function() {
        this.cancelDelay();
        return OpenLayers.Control.prototype.deactivate.apply(this, arguments);
    },

    /**
     * APIMethod: cancel
     * Stop the control from measuring.  If <persist> is true, the temporary
     *     sketch will be erased.
     */
    cancel: function() {
        this.cancelDelay();
        this.handler.cancel();
    },

    /**
     * APIMethod: setImmediate
     * Sets the <immediate> property. Changes the activity of immediate
     * measurement.
     */
    setImmediate: function(immediate) {
        this.immediate = immediate;
        if (this.immediate){
            this.callbacks.modify = this.measureImmediate;
        } else {
            delete this.callbacks.modify;
        }
    },
    
    /**
     * Method: updateHandler
     *
     * Parameters:
     * handler - {Function} One of the sketch handler constructors.
     * options - {Object} Options for the handler.
     */
    updateHandler: function(handler, options) {
        var active = this.active;
        if(active) {
            this.deactivate();
        }
        this.handler = new handler(this, this.callbacks, options);
        if(active) {
            this.activate();
        }
    },

    /**
     * Method: measureComplete
     * Called when the measurement sketch is done.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     */
    measureComplete: function(geometry) {
        this.cancelDelay();
        this.measure(geometry, "measure");
    },
    
    /**
     * Method: measurePartial
     * Called each time a new point is added to the measurement sketch.
     *
     * Parameters:
     * point - {<OpenLayers.Geometry.Point>} The last point added.
     * geometry - {<OpenLayers.Geometry>} The sketch geometry.
     */
    measurePartial: function(point, geometry) {
        this.cancelDelay();
        geometry = geometry.clone();
        // when we're wating for a dblclick, we have to trigger measurepartial
        // after some delay to deal with reflow issues in IE
        if (this.handler.freehandMode(this.handler.evt)) {
            // no dblclick in freehand mode
            this.measure(geometry, "measurepartial");
        } else {
            this.delayedTrigger = window.setTimeout(
                OpenLayers.Function.bind(function() {
                    this.delayedTrigger = null;
                    this.measure(geometry, "measurepartial");
                }, this),
                this.partialDelay
            );
        }
    },

    /**
     * Method: measureImmediate
     * Called each time the measurement sketch is modified.
     * 
     * Parameters: point - {<OpenLayers.Geometry.Point>} The point at the
     * mouseposition. feature - {<OpenLayers.Feature.Vector>} The sketch feature.
     */
    measureImmediate : function(point, feature, drawing) {
        if (drawing && !this.handler.freehandMode(this.handler.evt)) {
            this.cancelDelay();
            this.measure(feature.geometry, "measurepartial");
        }
    },

    /**
     * Method: cancelDelay
     * Cancels the delay measurement that measurePartial began.
     */
    cancelDelay: function() {
        if (this.delayedTrigger !== null) {
            window.clearTimeout(this.delayedTrigger);
            this.delayedTrigger = null;
        }
    },

    /**
     * Method: measure
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * eventType - {String}
     */
    measure: function(geometry, eventType) {
        var stat, order;
        if(geometry.CLASS_NAME.indexOf('LineString') > -1) {
            stat = this.getBestLength(geometry);
            order = 1;
        } else {
            stat = this.getBestArea(geometry);
            order = 2;
        }
        this.events.triggerEvent(eventType, {
            measure: stat[0],
            units: stat[1],
            order: order,
            geometry: geometry
        });
    },
    
    /**
     * Method: getBestArea
     * Based on the <displaySystem> returns the area of a geometry.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     *
     * Returns:
     * {Array([Float, String])}  Returns a two item array containing the
     *     area and the units abbreviation.
     */
    getBestArea: function(geometry) {
        var units = this.displaySystemUnits[this.displaySystem];
        var unit, area;
        for(var i=0, len=units.length; i<len; ++i) {
            unit = units[i];
            area = this.getArea(geometry, unit);
            if(area > 1) {
                break;
            }
        }
        return [area, unit];
    },
    
    /**
     * Method: getArea
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * units - {String} Unit abbreviation
     *
     * Returns:
     * {Float} The geometry area in the given units.
     */
    getArea: function(geometry, units) {
        var area, geomUnits;
        if(this.geodesic) {
            area = geometry.getGeodesicArea(this.map.getProjectionObject());
            geomUnits = "m";
        } else {
            area = geometry.getArea();
            geomUnits = this.map.getUnits();
        }
        var inPerDisplayUnit = OpenLayers.INCHES_PER_UNIT[units];
        if(inPerDisplayUnit) {
            var inPerMapUnit = OpenLayers.INCHES_PER_UNIT[geomUnits];
            area *= Math.pow((inPerMapUnit / inPerDisplayUnit), 2);
        }
        return area;
    },
    
    /**
     * Method: getBestLength
     * Based on the <displaySystem> returns the length of a geometry.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     *
     * Returns:
     * {Array([Float, String])}  Returns a two item array containing the
     *     length and the units abbreviation.
     */
    getBestLength: function(geometry) {
        var units = this.displaySystemUnits[this.displaySystem];
        var unit, length;
        for(var i=0, len=units.length; i<len; ++i) {
            unit = units[i];
            length = this.getLength(geometry, unit);
            if(length > 1) {
                break;
            }
        }
        return [length, unit];
    },

    /**
     * Method: getLength
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * units - {String} Unit abbreviation
     *
     * Returns:
     * {Float} The geometry length in the given units.
     */
    getLength: function(geometry, units) {
        var length, geomUnits;
        if(this.geodesic) {
            length = geometry.getGeodesicLength(this.map.getProjectionObject());
            geomUnits = "m";
        } else {
            length = geometry.getLength();
            geomUnits = this.map.getUnits();
        }
        var inPerDisplayUnit = OpenLayers.INCHES_PER_UNIT[units];
        if(inPerDisplayUnit) {
            var inPerMapUnit = OpenLayers.INCHES_PER_UNIT[geomUnits];
            length *= (inPerMapUnit / inPerDisplayUnit);
        }
        return length;
    },

    CLASS_NAME: "OpenLayers.Control.Measure"
});
/* ======================================================================
    OpenLayers/Format/WMC/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMC/v1.js
 */

/**
 * Class: OpenLayers.Format.WMC.v1_0_0
 * Read and write WMC version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMC.v1>
 */
OpenLayers.Format.WMC.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.WMC.v1, {
    
    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",
    
    /**
     * Property: schemaLocation
     * {String} http://www.opengis.net/context
     *     http://schemas.opengis.net/context/1.0.0/context.xsd
     */
    schemaLocation: "http://www.opengis.net/context http://schemas.opengis.net/context/1.0.0/context.xsd",

    /**
     * Constructor: OpenLayers.Format.WMC.v1_0_0
     * Instances of this class are not created directly.  Use the
     *     <OpenLayers.Format.WMC> constructor instead.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.WMC.v1.prototype.initialize.apply(
            this, [options]
        );
    },

    /**
     * Method: read_wmc_SRS
     */
    read_wmc_SRS: function(layerContext, node) {
        var srs    = this.getChildValue(node);
        if (typeof layerContext.projections != "object") {
            layerContext.projections = {};
        }
        var values = srs.split(/ +/);
        for (var i=0, len=values.length; i<len; i++) {
            layerContext.projections[values[i]] = true;
        }
    },

    /**
     * Method: write_wmc_Layer
     * Create a Layer node given a layer context object. This method adds
     *     elements specific to version 1.0.0.
     *
     * Parameters:
     * context - {Object} A layer context object.}
     *
     * Returns:
     * {Element} A WMC Layer element node.
     */
    write_wmc_Layer: function(context) {
        var node = OpenLayers.Format.WMC.v1.prototype.write_wmc_Layer.apply(
            this, [context]
        );
    
        // optional SRS element(s)
        if (context.srs) {
            var projections = [];
            for(var name in context.srs) {
                projections.push(name);
            }
            node.appendChild(this.createElementDefaultNS("SRS", projections.join(" ")));
        }

        // optional FormatList element
        node.appendChild(this.write_wmc_FormatList(context));

        // optional StyleList element
        node.appendChild(this.write_wmc_StyleList(context));
        
        // optional DimensionList element
        if (context.dimensions) {
            node.appendChild(this.write_wmc_DimensionList(context));
        }

        // OpenLayers specific properties go in an Extension element
        node.appendChild(this.write_wmc_LayerExtension(context));
    },    

    CLASS_NAME: "OpenLayers.Format.WMC.v1_0_0" 

});
/* ======================================================================
    OpenLayers/Popup/Framed.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Popup/Anchored.js
 */

/**
 * Class: OpenLayers.Popup.Framed
 * 
 * Inherits from:
 *  - <OpenLayers.Popup.Anchored>
 */
OpenLayers.Popup.Framed =
  OpenLayers.Class(OpenLayers.Popup.Anchored, {

    /**
     * Property: imageSrc
     * {String} location of the image to be used as the popup frame
     */
    imageSrc: null,

    /**
     * Property: imageSize
     * {<OpenLayers.Size>} Size (measured in pixels) of the image located
     *     by the 'imageSrc' property.
     */
    imageSize: null,

    /**
     * APIProperty: isAlphaImage
     * {Boolean} The image has some alpha and thus needs to use the alpha 
     *     image hack. Note that setting this to true will have no noticeable
     *     effect in FF or IE7 browsers, but will all but crush the ie6 
     *     browser. 
     *     Default is false.
     */
    isAlphaImage: false,

    /**
     * Property: positionBlocks
     * {Object} Hash of different position blocks (Object/Hashs). Each block 
     *     will be keyed by a two-character 'relativePosition' 
     *     code string (ie "tl", "tr", "bl", "br"). Block properties are 
     *     'offset', 'padding' (self-explanatory), and finally the 'blocks'
     *     parameter, which is an array of the block objects. 
     * 
     *     Each block object must have 'size', 'anchor', and 'position' 
     *     properties.
     * 
     *     Note that positionBlocks should never be modified at runtime.
     */
    positionBlocks: null,

    /**
     * Property: blocks
     * {Array[Object]} Array of objects, each of which is one "block" of the 
     *     popup. Each block has a 'div' and an 'image' property, both of 
     *     which are DOMElements, and the latter of which is appended to the 
     *     former. These are reused as the popup goes changing positions for
     *     great economy and elegance.
     */
    blocks: null,

    /** 
     * APIProperty: fixedRelativePosition
     * {Boolean} We want the framed popup to work dynamically placed relative
     *     to its anchor but also in just one fixed position. A well designed
     *     framed popup will have the pixels and logic to display itself in 
     *     any of the four relative positions, but (understandably), this will
     *     not be the case for all of them. By setting this property to 'true', 
     *     framed popup will not recalculate for the best placement each time
     *     it's open, but will always open the same way. 
     *     Note that if this is set to true, it is generally advisable to also
     *     set the 'panIntoView' property to true so that the popup can be 
     *     scrolled into view (since it will often be offscreen on open)
     *     Default is false.
     */
    fixedRelativePosition: false,

    /** 
     * Constructor: OpenLayers.Popup.Framed
     * 
     * Parameters:
     * id - {String}
     * lonlat - {<OpenLayers.LonLat>}
     * contentSize - {<OpenLayers.Size>}
     * contentHTML - {String}
     * anchor - {Object} Object to which we'll anchor the popup. Must expose 
     *     a 'size' (<OpenLayers.Size>) and 'offset' (<OpenLayers.Pixel>) 
     *     (Note that this is generally an <OpenLayers.Icon>).
     * closeBox - {Boolean}
     * closeBoxCallback - {Function} Function to be called on closeBox click.
     */
    initialize:function(id, lonlat, contentSize, contentHTML, anchor, closeBox, 
                        closeBoxCallback) {

        OpenLayers.Popup.Anchored.prototype.initialize.apply(this, arguments);

        if (this.fixedRelativePosition) {
            //based on our decided relativePostion, set the current padding
            // this keeps us from getting into trouble 
            this.updateRelativePosition();
            
            //make calculateRelativePosition always return the specified
            // fixed position.
            this.calculateRelativePosition = function(px) {
                return this.relativePosition;
            };
        }

        this.contentDiv.style.position = "absolute";
        this.contentDiv.style.zIndex = 1;

        if (closeBox) {
            this.closeDiv.style.zIndex = 1;
        }

        this.groupDiv.style.position = "absolute";
        this.groupDiv.style.top = "0px";
        this.groupDiv.style.left = "0px";
        this.groupDiv.style.height = "100%";
        this.groupDiv.style.width = "100%";
    },

    /** 
     * APIMethod: destroy
     */
    destroy: function() {
        this.imageSrc = null;
        this.imageSize = null;
        this.isAlphaImage = null;

        this.fixedRelativePosition = false;
        this.positionBlocks = null;

        //remove our blocks
        for(var i = 0; i < this.blocks.length; i++) {
            var block = this.blocks[i];

            if (block.image) {
                block.div.removeChild(block.image);
            }
            block.image = null;

            if (block.div) {
                this.groupDiv.removeChild(block.div);
            }
            block.div = null;
        }
        this.blocks = null;

        OpenLayers.Popup.Anchored.prototype.destroy.apply(this, arguments);
    },

    /**
     * APIMethod: setBackgroundColor
     */
    setBackgroundColor:function(color) {
        //does nothing since the framed popup's entire scheme is based on a 
        // an image -- changing the background color makes no sense. 
    },

    /**
     * APIMethod: setBorder
     */
    setBorder:function() {
        //does nothing since the framed popup's entire scheme is based on a 
        // an image -- changing the popup's border makes no sense. 
    },

    /**
     * Method: setOpacity
     * Sets the opacity of the popup.
     * 
     * Parameters:
     * opacity - {float} A value between 0.0 (transparent) and 1.0 (solid).   
     */
    setOpacity:function(opacity) {
        //does nothing since we suppose that we'll never apply an opacity
        // to a framed popup
    },

    /**
     * APIMethod: setSize
     * Overridden here, because we need to update the blocks whenever the size
     *     of the popup has changed.
     * 
     * Parameters:
     * contentSize - {<OpenLayers.Size>} the new size for the popup's 
     *     contents div (in pixels).
     */
    setSize:function(contentSize) { 
        OpenLayers.Popup.Anchored.prototype.setSize.apply(this, arguments);

        this.updateBlocks();
    },

    /**
     * Method: updateRelativePosition
     * When the relative position changes, we need to set the new padding 
     *     BBOX on the popup, reposition the close div, and update the blocks.
     */
    updateRelativePosition: function() {

        //update the padding
        this.padding = this.positionBlocks[this.relativePosition].padding;

        //update the position of our close box to new padding
        if (this.closeDiv) {
            // use the content div's css padding to determine if we should
            //  padd the close div
            var contentDivPadding = this.getContentDivPadding();

            this.closeDiv.style.right = contentDivPadding.right + 
                                        this.padding.right + "px";
            this.closeDiv.style.top = contentDivPadding.top + 
                                      this.padding.top + "px";
        }

        this.updateBlocks();
    },

    /** 
     * Method: calculateNewPx
     * Besides the standard offset as determined by the Anchored class, our 
     *     Framed popups have a special 'offset' property for each of their 
     *     positions, which is used to offset the popup relative to its anchor.
     * 
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     * 
     * Returns:
     * {<OpenLayers.Pixel>} The the new px position of the popup on the screen
     *     relative to the passed-in px.
     */
    calculateNewPx:function(px) {
        var newPx = OpenLayers.Popup.Anchored.prototype.calculateNewPx.apply(
            this, arguments
        );

        newPx = newPx.offset(this.positionBlocks[this.relativePosition].offset);

        return newPx;
    },

    /**
     * Method: createBlocks
     */
    createBlocks: function() {
        this.blocks = [];

        //since all positions contain the same number of blocks, we can 
        // just pick the first position and use its blocks array to create
        // our blocks array
        var firstPosition = null;
        for(var key in this.positionBlocks) {
            firstPosition = key;
            break;
        }
        
        var position = this.positionBlocks[firstPosition];
        for (var i = 0; i < position.blocks.length; i++) {

            var block = {};
            this.blocks.push(block);

            var divId = this.id + '_FrameDecorationDiv_' + i;
            block.div = OpenLayers.Util.createDiv(divId, 
                null, null, null, "absolute", null, "hidden", null
            );

            var imgId = this.id + '_FrameDecorationImg_' + i;
            var imageCreator = 
                (this.isAlphaImage) ? OpenLayers.Util.createAlphaImageDiv
                                    : OpenLayers.Util.createImage;

            block.image = imageCreator(imgId, 
                null, this.imageSize, this.imageSrc, 
                "absolute", null, null, null
            );

            block.div.appendChild(block.image);
            this.groupDiv.appendChild(block.div);
        }
    },

    /**
     * Method: updateBlocks
     * Internal method, called on initialize and when the popup's relative
     *     position has changed. This function takes care of re-positioning
     *     the popup's blocks in their appropropriate places.
     */
    updateBlocks: function() {
        if (!this.blocks) {
            this.createBlocks();
        }
        
        if (this.size && this.relativePosition) {
            var position = this.positionBlocks[this.relativePosition];
            for (var i = 0; i < position.blocks.length; i++) {
    
                var positionBlock = position.blocks[i];
                var block = this.blocks[i];
    
                // adjust sizes
                var l = positionBlock.anchor.left;
                var b = positionBlock.anchor.bottom;
                var r = positionBlock.anchor.right;
                var t = positionBlock.anchor.top;
    
                //note that we use the isNaN() test here because if the 
                // size object is initialized with a "auto" parameter, the 
                // size constructor calls parseFloat() on the string, 
                // which will turn it into NaN
                //
                var w = (isNaN(positionBlock.size.w)) ? this.size.w - (r + l) 
                                                      : positionBlock.size.w;
    
                var h = (isNaN(positionBlock.size.h)) ? this.size.h - (b + t) 
                                                      : positionBlock.size.h;
    
                block.div.style.width = (w < 0 ? 0 : w) + 'px';
                block.div.style.height = (h < 0 ? 0 : h) + 'px';
    
                block.div.style.left = (l != null) ? l + 'px' : '';
                block.div.style.bottom = (b != null) ? b + 'px' : '';
                block.div.style.right = (r != null) ? r + 'px' : '';            
                block.div.style.top = (t != null) ? t + 'px' : '';
    
                block.image.style.left = positionBlock.position.x + 'px';
                block.image.style.top = positionBlock.position.y + 'px';
            }
    
            this.contentDiv.style.left = this.padding.left + "px";
            this.contentDiv.style.top = this.padding.top + "px";
        }
    },

    CLASS_NAME: "OpenLayers.Popup.Framed"
});
/* ======================================================================
    OpenLayers/Popup/FramedCloud.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Popup/Framed.js
 * @requires OpenLayers/Util.js
 * @requires OpenLayers/BaseTypes/Bounds.js
 * @requires OpenLayers/BaseTypes/Pixel.js
 * @requires OpenLayers/BaseTypes/Size.js
 */

/**
 * Class: OpenLayers.Popup.FramedCloud
 * 
 * Inherits from: 
 *  - <OpenLayers.Popup.Framed>
 */
OpenLayers.Popup.FramedCloud = 
  OpenLayers.Class(OpenLayers.Popup.Framed, {

    /** 
     * Property: contentDisplayClass
     * {String} The CSS class of the popup content div.
     */
    contentDisplayClass: "olFramedCloudPopupContent",

    /**
     * APIProperty: autoSize
     * {Boolean} Framed Cloud is autosizing by default.
     */
    autoSize: true,

    /**
     * APIProperty: panMapIfOutOfView
     * {Boolean} Framed Cloud does pan into view by default.
     */
    panMapIfOutOfView: true,

    /**
     * APIProperty: imageSize
     * {<OpenLayers.Size>}
     */
    imageSize: new OpenLayers.Size(1276, 736),

    /**
     * APIProperty: isAlphaImage
     * {Boolean} The FramedCloud does not use an alpha image (in honor of the 
     *     good ie6 folk out there)
     */
    isAlphaImage: false,

    /** 
     * APIProperty: fixedRelativePosition
     * {Boolean} The Framed Cloud popup works in just one fixed position.
     */
    fixedRelativePosition: false,

    /**
     * Property: positionBlocks
     * {Object} Hash of differen position blocks, keyed by relativePosition
     *     two-character code string (ie "tl", "tr", "bl", "br")
     */
    positionBlocks: {
        "tl": {
            'offset': new OpenLayers.Pixel(44, 0),
            'padding': new OpenLayers.Bounds(8, 40, 8, 9),
            'blocks': [
                { // top-left
                    size: new OpenLayers.Size('auto', 'auto'),
                    anchor: new OpenLayers.Bounds(0, 51, 22, 0),
                    position: new OpenLayers.Pixel(0, 0)
                },
                { //top-right
                    size: new OpenLayers.Size(22, 'auto'),
                    anchor: new OpenLayers.Bounds(null, 50, 0, 0),
                    position: new OpenLayers.Pixel(-1238, 0)
                },
                { //bottom-left
                    size: new OpenLayers.Size('auto', 19),
                    anchor: new OpenLayers.Bounds(0, 32, 22, null),
                    position: new OpenLayers.Pixel(0, -631)
                },
                { //bottom-right
                    size: new OpenLayers.Size(22, 18),
                    anchor: new OpenLayers.Bounds(null, 32, 0, null),
                    position: new OpenLayers.Pixel(-1238, -632)
                },
                { // stem
                    size: new OpenLayers.Size(81, 35),
                    anchor: new OpenLayers.Bounds(null, 0, 0, null),
                    position: new OpenLayers.Pixel(0, -688)
                }
            ]
        },
        "tr": {
            'offset': new OpenLayers.Pixel(-45, 0),
            'padding': new OpenLayers.Bounds(8, 40, 8, 9),
            'blocks': [
                { // top-left
                    size: new OpenLayers.Size('auto', 'auto'),
                    anchor: new OpenLayers.Bounds(0, 51, 22, 0),
                    position: new OpenLayers.Pixel(0, 0)
                },
                { //top-right
                    size: new OpenLayers.Size(22, 'auto'),
                    anchor: new OpenLayers.Bounds(null, 50, 0, 0),
                    position: new OpenLayers.Pixel(-1238, 0)
                },
                { //bottom-left
                    size: new OpenLayers.Size('auto', 19),
                    anchor: new OpenLayers.Bounds(0, 32, 22, null),
                    position: new OpenLayers.Pixel(0, -631)
                },
                { //bottom-right
                    size: new OpenLayers.Size(22, 19),
                    anchor: new OpenLayers.Bounds(null, 32, 0, null),
                    position: new OpenLayers.Pixel(-1238, -631)
                },
                { // stem
                    size: new OpenLayers.Size(81, 35),
                    anchor: new OpenLayers.Bounds(0, 0, null, null),
                    position: new OpenLayers.Pixel(-215, -687)
                }
            ]
        },
        "bl": {
            'offset': new OpenLayers.Pixel(45, 0),
            'padding': new OpenLayers.Bounds(8, 9, 8, 40),
            'blocks': [
                { // top-left
                    size: new OpenLayers.Size('auto', 'auto'),
                    anchor: new OpenLayers.Bounds(0, 21, 22, 32),
                    position: new OpenLayers.Pixel(0, 0)
                },
                { //top-right
                    size: new OpenLayers.Size(22, 'auto'),
                    anchor: new OpenLayers.Bounds(null, 21, 0, 32),
                    position: new OpenLayers.Pixel(-1238, 0)
                },
                { //bottom-left
                    size: new OpenLayers.Size('auto', 21),
                    anchor: new OpenLayers.Bounds(0, 0, 22, null),
                    position: new OpenLayers.Pixel(0, -629)
                },
                { //bottom-right
                    size: new OpenLayers.Size(22, 21),
                    anchor: new OpenLayers.Bounds(null, 0, 0, null),
                    position: new OpenLayers.Pixel(-1238, -629)
                },
                { // stem
                    size: new OpenLayers.Size(81, 33),
                    anchor: new OpenLayers.Bounds(null, null, 0, 0),
                    position: new OpenLayers.Pixel(-101, -674)
                }
            ]
        },
        "br": {
            'offset': new OpenLayers.Pixel(-44, 0),
            'padding': new OpenLayers.Bounds(8, 9, 8, 40),
            'blocks': [
                { // top-left
                    size: new OpenLayers.Size('auto', 'auto'),
                    anchor: new OpenLayers.Bounds(0, 21, 22, 32),
                    position: new OpenLayers.Pixel(0, 0)
                },
                { //top-right
                    size: new OpenLayers.Size(22, 'auto'),
                    anchor: new OpenLayers.Bounds(null, 21, 0, 32),
                    position: new OpenLayers.Pixel(-1238, 0)
                },
                { //bottom-left
                    size: new OpenLayers.Size('auto', 21),
                    anchor: new OpenLayers.Bounds(0, 0, 22, null),
                    position: new OpenLayers.Pixel(0, -629)
                },
                { //bottom-right
                    size: new OpenLayers.Size(22, 21),
                    anchor: new OpenLayers.Bounds(null, 0, 0, null),
                    position: new OpenLayers.Pixel(-1238, -629)
                },
                { // stem
                    size: new OpenLayers.Size(81, 33),
                    anchor: new OpenLayers.Bounds(0, null, null, 0),
                    position: new OpenLayers.Pixel(-311, -674)
                }
            ]
        }
    },

    /**
     * APIProperty: minSize
     * {<OpenLayers.Size>}
     */
    minSize: new OpenLayers.Size(105, 10),

    /**
     * APIProperty: maxSize
     * {<OpenLayers.Size>}
     */
    maxSize: new OpenLayers.Size(1200, 660),

    /** 
     * Constructor: OpenLayers.Popup.FramedCloud
     * 
     * Parameters:
     * id - {String}
     * lonlat - {<OpenLayers.LonLat>}
     * contentSize - {<OpenLayers.Size>}
     * contentHTML - {String}
     * anchor - {Object} Object to which we'll anchor the popup. Must expose 
     *     a 'size' (<OpenLayers.Size>) and 'offset' (<OpenLayers.Pixel>) 
     *     (Note that this is generally an <OpenLayers.Icon>).
     * closeBox - {Boolean}
     * closeBoxCallback - {Function} Function to be called on closeBox click.
     */
    initialize:function(id, lonlat, contentSize, contentHTML, anchor, closeBox, 
                        closeBoxCallback) {

        this.imageSrc = OpenLayers.Util.getImageLocation('cloud-popup-relative.png');
        OpenLayers.Popup.Framed.prototype.initialize.apply(this, arguments);
        this.contentDiv.className = this.contentDisplayClass;
    },

    CLASS_NAME: "OpenLayers.Popup.FramedCloud"
});
/* ======================================================================
    OpenLayers/Tile/Image/IFrame.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Tile/Image.js
 */

/**
 * Constant: OpenLayers.Tile.Image.IFrame
 * Mixin for tiles that use form-encoded POST requests to get images from
 * remote services. Images will be loaded using HTTP-POST into an IFrame.
 *
 * This mixin will be applied to <OpenLayers.Tile.Image> instances
 * configured with <OpenLayers.Tile.Image.maxGetUrlLength> set.
 */
OpenLayers.Tile.Image.IFrame = {

    /**
     * Property: useIFrame
     * {Boolean} true if we are currently using an IFrame to render POST
     * responses, false if we are using an img element to render GET responses.
     */ 
    useIFrame: null,

    /**
     * Method: draw
     * Set useIFrame in the instance, and operate the image/iframe switch.
     * Then call Tile.Image.draw.
     *
     * Returns:
     * {Boolean}
     */
    draw: function() {
        var draw = OpenLayers.Tile.Image.prototype.shouldDraw.call(this);
        if(draw) {

            // this.url isn't set to the currect value yet, so we call getURL
            // on the layer and store the result in a local variable
            var url = this.layer.getURL(this.bounds);

            var usedIFrame = this.useIFrame;
            this.useIFrame = this.maxGetUrlLength !== null &&
                             !this.layer.async &&
                             url.length > this.maxGetUrlLength;

            var fromIFrame = usedIFrame && !this.useIFrame;
            var toIFrame = !usedIFrame && this.useIFrame;

            if(fromIFrame || toIFrame) {

                // Switching between GET (image) and POST (iframe).

                // We remove the imgDiv (really either an image or an iframe)
                // from the frame and set it to null to make sure initImage
                // will call getImage.

                if(this.imgDiv && this.imgDiv.parentNode === this.frame) {
                    this.frame.removeChild(this.imgDiv);
                }
                this.imgDiv = null;

                // And if we had an iframe we also remove the event pane.

                if(fromIFrame) {
                    this.blankImageUrl = this._blankImageUrl;
                    this.frame.removeChild(this.frame.firstChild);
                } else {
                    this._blankImageUrl = this.blankImageUrl;
                    this.blankImageUrl = "about:blank";
                }
            }
        }
        return OpenLayers.Tile.Image.prototype.draw.apply(this, arguments);
    },

    /**
     * Method: getImage
     * Creates the content for the frame on the tile.
     */
    getImage: function() {
        if (this.useIFrame === true) {
            if (!this.frame.childNodes.length) {
                var eventPane = document.createElement("div"),
                    style = eventPane.style;
                style.position = "absolute";
                style.width = "100%";
                style.height = "100%";
                style.zIndex = 1;
                style.backgroundImage = "url(" + this._blankImageUrl + ")";
                this.frame.appendChild(eventPane);
            }

            var id = this.id + '_iFrame', iframe;
            if (parseFloat(navigator.appVersion.split("MSIE")[1]) < 9) {
                // Older IE versions do not set the name attribute of an iFrame 
                // properly via DOM manipulation, so we need to do it on our own with
                // this hack.
                iframe = document.createElement('<iframe name="'+id+'">');

                // IFrames in older IE versions are not transparent, if you set
                // the backgroundColor transparent. This is a workaround to get 
                // transparent iframes.
                iframe.style.backgroundColor = '#FFFFFF';
                iframe.style.filter          = 'chroma(color=#FFFFFF)';
            }
            else {
                iframe = document.createElement('iframe');
                iframe.style.backgroundColor = 'transparent';

                // iframe.name needs to be an unique id, otherwise it 
                // could happen that other iframes are overwritten.
                iframe.name = id;
            }

            // some special properties to avoid scaling the images and scrollbars 
            // in the iframe
            iframe.scrolling      = 'no';
            iframe.marginWidth    = '0px';
            iframe.marginHeight   = '0px';
            iframe.frameBorder    = '0';

            iframe.style.position = "absolute";
            iframe.style.width    = "100%";
            iframe.style.height   = "100%";

            if (this.layer.opacity < 1) {
                OpenLayers.Util.modifyDOMElement(iframe, null, null, null,
                    null, null, null, this.layer.opacity);
            }
            this.frame.appendChild(iframe);
            this.imgDiv = iframe;
            return iframe;
        } else {
            return OpenLayers.Tile.Image.prototype.getImage.apply(this, arguments);
        }
    },
    
    /**
     * Method: createRequestForm
     * Create the html <form> element with width, height, bbox and all 
     * parameters specified in the layer params.
     *
     * Returns: 
     * {DOMElement} The form element which sends the HTTP-POST request to the
     *              WMS. 
     */
    createRequestForm: function() {
        // creation of the form element
        var form = document.createElement('form');
        form.method = 'POST';
        var cacheId = this.layer.params["_OLSALT"];
        cacheId = (cacheId ? cacheId + "_" : "") + this.bounds.toBBOX();
        form.action = OpenLayers.Util.urlAppend(this.layer.url, cacheId);
        form.target = this.id + '_iFrame';

        // adding all parameters in layer params as hidden fields to the html
        // form element
        var imageSize = this.layer.getImageSize(),
            params = OpenLayers.Util.getParameters(this.url),
            field;
            
        for(var par in params) {
            field = document.createElement('input');
            field.type  = 'hidden';
            field.name  = par;
            field.value = params[par];
            form.appendChild(field);
        }   

        return form;
    },

    /**
     * Method: setImgSrc
     * Sets the source for the tile image
     *
     * Parameters:
     * url - {String}
     */
    setImgSrc: function(url) {
        if (this.useIFrame === true) {
            if (url) {
                var form = this.createRequestForm();
                this.frame.appendChild(form);
                form.submit();
                this.frame.removeChild(form);
            } else if (this.imgDiv.parentNode === this.frame) {
                // we don't reuse iframes to avoid caching issues
                this.frame.removeChild(this.imgDiv);
                this.imgDiv = null;
            }
        } else {
            OpenLayers.Tile.Image.prototype.setImgSrc.apply(this, arguments);
        }
    },
    
    /**
     * Method: onImageLoad
     * Handler for the image onload event
     */
    onImageLoad: function() {
        //TODO de-uglify opacity handling
        OpenLayers.Tile.Image.prototype.onImageLoad.apply(this, arguments);
        if (this.useIFrame === true) {
            this.imgDiv.style.opacity = 1;
            this.frame.style.opacity = this.layer.opacity;
        }
    },

    /**
     * Method: createBackBuffer
     * Override createBackBuffer to do nothing when we use an iframe. Moving an
     * iframe from one element to another makes it necessary to reload the iframe
     * because its content is lost. So we just give up.
     *
     * Returns:
     * {DOMElement}
     */
    createBackBuffer: function() {
        var backBuffer;
        if(this.useIFrame === false) {
            backBuffer = OpenLayers.Tile.Image.prototype.createBackBuffer.call(this);
        }
        return backBuffer;
    }
};
/* ======================================================================
    OpenLayers/Format/SOSCapabilities.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */
 
/**
 * Class: OpenLayers.Format.SOSCapabilities
 * Read SOS Capabilities.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.SOSCapabilities = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.0.0".
     */
    defaultVersion: "1.0.0",
    
    /**
     * Constructor: OpenLayers.Format.SOSCapabilities
     * Create a new parser for SOS Capabilities.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return information about
     * the service (offering and observedProperty mostly).
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Info about the SOS
     */
    
    CLASS_NAME: "OpenLayers.Format.SOSCapabilities" 

});
/* ======================================================================
    OpenLayers/Format/SOSCapabilities/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/SOSCapabilities.js
 * @requires OpenLayers/Format/OWSCommon/v1_1_0.js
 * @requires OpenLayers/Format/GML/v3.js
 */

/**
 * Class: OpenLayers.Format.SOSCapabilities.v1_0_0
 * Read SOS Capabilities version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.SOSCapabilities>
 */
OpenLayers.Format.SOSCapabilities.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.SOSCapabilities, {

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows/1.1",
        sos: "http://www.opengis.net/sos/1.0",
        gml: "http://www.opengis.net/gml",
        xlink: "http://www.w3.org/1999/xlink"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },
    
    /**
     * Constructor: OpenLayers.Format.SOSCapabilities.v1_0_0
     * Create a new parser for SOS capabilities version 1.0.0. 
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
        this.options = options;
    },

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return info about the SOS.
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Information about the SOS service.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var capabilities = {};
        this.readNode(data, capabilities);
        return capabilities;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "gml": OpenLayers.Util.applyDefaults({
            "name": function(node, obj) {
                obj.name = this.getChildValue(node);
            },
            "TimePeriod": function(node, obj) {
                obj.timePeriod = {};
                this.readChildNodes(node, obj.timePeriod);
            },
            "beginPosition": function(node, timePeriod) {
                timePeriod.beginPosition = this.getChildValue(node);
            },
            "endPosition": function(node, timePeriod) {
                timePeriod.endPosition = this.getChildValue(node);
            }
        }, OpenLayers.Format.GML.v3.prototype.readers["gml"]),
        "sos": {
            "Capabilities": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Contents": function(node, obj) {
                obj.contents = {};
                this.readChildNodes(node, obj.contents);
            },
            "ObservationOfferingList": function(node, contents) {
                contents.offeringList = {};
                this.readChildNodes(node, contents.offeringList);
            },
            "ObservationOffering": function(node, offeringList) {
                var id = this.getAttributeNS(node, this.namespaces.gml, "id");
                offeringList[id] = {
                    procedures: [],
                    observedProperties: [],
                    featureOfInterestIds: [],
                    responseFormats: [],
                    resultModels: [],
                    responseModes: []
                };
                this.readChildNodes(node, offeringList[id]);
            },
            "time": function(node, offering) {
                offering.time = {};
                this.readChildNodes(node, offering.time);
            },
            "procedure": function(node, offering) {
                offering.procedures.push(this.getAttributeNS(node, 
                    this.namespaces.xlink, "href"));
            },
            "observedProperty": function(node, offering) {
                offering.observedProperties.push(this.getAttributeNS(node, 
                    this.namespaces.xlink, "href"));
            },
            "featureOfInterest": function(node, offering) {
                offering.featureOfInterestIds.push(this.getAttributeNS(node, 
                    this.namespaces.xlink, "href"));
            },
            "responseFormat": function(node, offering) {
                offering.responseFormats.push(this.getChildValue(node));
            },
            "resultModel": function(node, offering) {
                offering.resultModels.push(this.getChildValue(node));
            },
            "responseMode": function(node, offering) {
                offering.responseModes.push(this.getChildValue(node));
            }
        },
        "ows": OpenLayers.Format.OWSCommon.v1_1_0.prototype.readers["ows"]
    },    
    
    CLASS_NAME: "OpenLayers.Format.SOSCapabilities.v1_0_0" 

});
/* ======================================================================
    OpenLayers/Handler/Pinch.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 */

/**
 * Class: OpenLayers.Handler.Pinch
 * The pinch handler is used to deal with sequences of browser events related
 *     to pinch gestures. The handler is used by controls that want to know
 *     when a pinch sequence begins, when a pinch is happening, and when it has
 *     finished.
 *
 * Controls that use the pinch handler typically construct it with callbacks
 *     for 'start', 'move', and 'done'.  Callbacks for these keys are
 *     called when the pinch begins, with each change, and when the pinch is
 *     done.
 *
 * Create a new pinch handler with the <OpenLayers.Handler.Pinch> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.Pinch = OpenLayers.Class(OpenLayers.Handler, {

    /**
     * Property: started
     * {Boolean} When a touchstart event is received, we want to record it,
     *     but not set 'pinching' until the touchmove get started after
     *     starting.
     */
    started: false,

    /**
     * Property: stopDown
     * {Boolean} Stop propagation of touchstart events from getting to
     *     listeners on the same element. Default is false.
     */
    stopDown: false,

    /**
     * Property: pinching
     * {Boolean}
     */
    pinching: false,

    /**
     * Property: last
     * {Object} Object that store informations related to pinch last touch.
     */
    last: null,

    /**
     * Property: start
     * {Object} Object that store informations related to pinch touchstart.
     */
    start: null,

    /**
     * Constructor: OpenLayers.Handler.Pinch
     * Returns OpenLayers.Handler.Pinch
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that is making use of
     *     this handler.  If a handler is being used without a control, the
     *     handlers setMap method must be overridden to deal properly with
     *     the map.
     * callbacks - {Object} An object containing functions to be called when
     *     the pinch operation start, change, or is finished. The callbacks
     *     should expect to receive an object argument, which contains
     *     information about scale, distance, and position of touch points.
     * options - {Object}
     */

    /**
     * Method: touchstart
     * Handle touchstart events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchstart: function(evt) {
        var propagate = true;
        this.pinching = false;
        if (OpenLayers.Event.isMultiTouch(evt)) {
            this.started = true;
            this.last = this.start = {
                distance: this.getDistance(evt.touches),
                delta: 0,
                scale: 1
            };
            this.callback("start", [evt, this.start]);
            propagate = !this.stopDown;
        } else {
            this.started = false;
            this.start = null;
            this.last = null;
        }
        // prevent document dragging
        OpenLayers.Event.stop(evt);
        return propagate;
    },

    /**
     * Method: touchmove
     * Handle touchmove events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchmove: function(evt) {
        if (this.started && OpenLayers.Event.isMultiTouch(evt)) {
            this.pinching = true;
            var current = this.getPinchData(evt);
            this.callback("move", [evt, current]);
            this.last = current;
            // prevent document dragging
            OpenLayers.Event.stop(evt);
        }
        return true;
    },

    /**
     * Method: touchend
     * Handle touchend events
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Boolean} Let the event propagate.
     */
    touchend: function(evt) {
        if (this.started) {
            this.started = false;
            this.pinching = false;
            this.callback("done", [evt, this.start, this.last]);
            this.start = null;
            this.last = null;
        }
        return true;
    },

    /**
     * Method: activate
     * Activate the handler.
     *
     * Returns:
     * {Boolean} The handler was successfully activated.
     */
    activate: function() {
        var activated = false;
        if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            this.pinching = false;
            activated = true;
        }
        return activated;
    },

    /**
     * Method: deactivate
     * Deactivate the handler.
     *
     * Returns:
     * {Boolean} The handler was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = false;
        if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            this.started = false;
            this.pinching = false;
            this.start = null;
            this.last = null;
            deactivated = true;
        }
        return deactivated;
    },

    /**
     * Method: getDistance
     * Get the distance in pixels between two touches.
     *
     * Parameters:
     * touches - {Array(Object)}
     *
     * Returns:
     * {Number} The distance in pixels.
     */
    getDistance: function(touches) {
        var t0 = touches[0];
        var t1 = touches[1];
        return Math.sqrt(
            Math.pow(t0.clientX - t1.clientX, 2) +
            Math.pow(t0.clientY - t1.clientY, 2)
        );
    },


    /**
     * Method: getPinchData
     * Get informations about the pinch event.
     *
     * Parameters:
     * evt - {Event}
     *
     * Returns:
     * {Object} Object that contains data about the current pinch.
     */
    getPinchData: function(evt) {
        var distance = this.getDistance(evt.touches);
        var scale = distance / this.start.distance;
        return {
            distance: distance,
            delta: this.last.distance - distance,
            scale: scale
        };
    },

    CLASS_NAME: "OpenLayers.Handler.Pinch"
});

/* ======================================================================
    OpenLayers/Control/NavToolbar.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/Panel.js
 * @requires OpenLayers/Control/Navigation.js
 * @requires OpenLayers/Control/ZoomBox.js
 */

/**
 * Class: OpenLayers.Control.NavToolbar
 * This Toolbar is an alternative to the Navigation control that displays
 *     the state of the control, and provides a UI for changing state to
 *     use the zoomBox via a Panel control.
 *
 * If you wish to change the properties of the Navigation control used
 *     in the NavToolbar, see: 
 *     http://trac.openlayers.org/wiki/Toolbars#SubclassingNavToolbar 
 * 
 * 
 * Inherits from:
 *  - <OpenLayers.Control.Panel>
 */
OpenLayers.Control.NavToolbar = OpenLayers.Class(OpenLayers.Control.Panel, {

    /**
     * Constructor: OpenLayers.Control.NavToolbar 
     * Add our two mousedefaults controls.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(options) {
        OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);
        this.addControls([
          new OpenLayers.Control.Navigation(),
          new OpenLayers.Control.ZoomBox()
        ]);
    },

    /**
     * Method: draw 
     * calls the default draw, and then activates mouse defaults.
     */
    draw: function() {
        var div = OpenLayers.Control.Panel.prototype.draw.apply(this, arguments);
        if (this.defaultControl === null) {
            this.defaultControl = this.controls[0];
        }
        return div;
    },

    CLASS_NAME: "OpenLayers.Control.NavToolbar"
});
/* ======================================================================
    OpenLayers/Strategy/Refresh.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 */

/**
 * Class: OpenLayers.Strategy.Refresh
 * A strategy that refreshes the layer. By default the strategy waits for a
 *     call to <refresh> before refreshing.  By configuring the strategy with 
 *     the <interval> option, refreshing can take place automatically.
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.Refresh = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * Property: force
     * {Boolean} Force a refresh on the layer. Default is false.
     */
    force: false,

    /**
     * Property: interval
     * {Number} Auto-refresh. Default is 0.  If > 0, layer will be refreshed 
     *     every N milliseconds.
     */
    interval: 0,
    
    /**
     * Property: timer
     * {Number} The id of the timer.
     */
    timer: null,

    /**
     * Constructor: OpenLayers.Strategy.Refresh
     * Create a new Refresh strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
   
    /**
     * APIMethod: activate
     * Activate the strategy. Register any listeners, do appropriate setup.
     * 
     * Returns:
     * {Boolean} True if the strategy was successfully activated.
     */
    activate: function() {
        var activated = OpenLayers.Strategy.prototype.activate.call(this);
        if(activated) {
            if(this.layer.visibility === true) {
                this.start();
            } 
            this.layer.events.on({
                "visibilitychanged": this.reset,
                scope: this
            });
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the strategy. Unregister any listeners, do appropriate
     *     tear-down.
     * 
     * Returns:
     * {Boolean} True if the strategy was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
        if(deactivated) {
            this.stop();
        }
        return deactivated;
    },
    
    /**
     * Method: reset
     * Start or cancel the refresh interval depending on the visibility of 
     *     the layer.
     */
    reset: function() {
        if(this.layer.visibility === true) {
            this.start();
        } else {
            this.stop();
        }
    },
    
    /**
     * Method: start
     * Start the refresh interval. 
     */
    start: function() {
        if(this.interval && typeof this.interval === "number" && 
            this.interval > 0) {

            this.timer = window.setInterval(
                OpenLayers.Function.bind(this.refresh, this),
                this.interval);
        }
    },
    
    /**
     * APIMethod: refresh
     * Tell the strategy to refresh which will refresh the layer.
     */
    refresh: function() {
        if (this.layer && this.layer.refresh && 
            typeof this.layer.refresh == "function") {

            this.layer.refresh({force: this.force});
        }
    },
   
    /**
     * Method: stop
     * Cancels the refresh interval. 
     */
    stop: function() {
        if(this.timer !== null) {
            window.clearInterval(this.timer);
            this.timer = null;
        }
    },
    
    CLASS_NAME: "OpenLayers.Strategy.Refresh" 
});
/* ======================================================================
    OpenLayers/Layer/ArcGIS93Rest.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.ArcGIS93Rest
 * Instances of OpenLayers.Layer.ArcGIS93Rest are used to display data from
 *     ESRI ArcGIS Server 9.3 (and up?) Mapping Services using the REST API.
 *     Create a new ArcGIS93Rest layer with the <OpenLayers.Layer.ArcGIS93Rest>
 *     constructor.  More detail on the REST API is available at
 *     http://sampleserver1.arcgisonline.com/ArcGIS/SDK/REST/index.html ;
 *     specifically, the URL provided to this layer should be an export service
 *     URL: http://sampleserver1.arcgisonline.com/ArcGIS/SDK/REST/export.html 
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.ArcGIS93Rest = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /**
     * Constant: DEFAULT_PARAMS
     * {Object} Hashtable of default parameter key/value pairs 
     */
    DEFAULT_PARAMS: { 
      format: "png"
    },
        
    /**
     * APIProperty: isBaseLayer
     * {Boolean} Default is true for ArcGIS93Rest layer
     */
    isBaseLayer: true,
 
 
    /**
     * Constructor: OpenLayers.Layer.ArcGIS93Rest
     * Create a new ArcGIS93Rest layer object.
     *
     * Example:
     * (code)
     * var arcims = new OpenLayers.Layer.ArcGIS93Rest("MyName",
     *                                    "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/export", 
     *                                    {
     *                                      layers: "0,1,2"
     *                                    });
     * (end)
     *
     * Parameters:
     * name - {String} A name for the layer
     * url - {String} Base url for the ArcGIS server REST service
     * options - {Object} An object with key/value pairs representing the
     *                    options and option values.
     *
     * Valid Options:
     *        format - {String} MIME type of desired image type.
     *        layers - {String} Comma-separated list of layers to display.
     *        srs - {String} Projection ID.
     */
    initialize: function(name, url, params, options) {
        var newArguments = [];
        //uppercase params
        params = OpenLayers.Util.upperCaseObject(params);
        newArguments.push(name, url, params, options);
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
        OpenLayers.Util.applyDefaults(
                       this.params, 
                       OpenLayers.Util.upperCaseObject(this.DEFAULT_PARAMS)
                       );
                       
        //layer is transparent        
        if (this.params.TRANSPARENT && 
            this.params.TRANSPARENT.toString().toLowerCase() == "true") {
            
            // unless explicitly set in options, make layer an overlay
            if ( (options == null) || (!options.isBaseLayer) ) {
                this.isBaseLayer = false;
            } 
            
            // jpegs can never be transparent, so intelligently switch the 
            //  format, depending on the browser's capabilities
            if (this.params.FORMAT == "jpg") {
                this.params.FORMAT = OpenLayers.Util.alphaHack() ? "gif"
                                                                 : "png";
            }
        }
    },    

    /**
         * Method: clone
         * Create a clone of this layer
         *
         * Returns:
         * {<OpenLayers.Layer.ArcGIS93Rest>} An exact clone of this layer
         */
    clone: function (obj) {
        
        if (obj == null) {
            obj = new OpenLayers.Layer.ArcGIS93Rest(this.name,
                                           this.url,
                                           this.params,
                                           this.getOptions());
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },
    
    
    /**
     * Method: getURL
     * Return an image url this layer.
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
     *                                request.
     *
     * Returns:
     * {String} A string with the map image's url.
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);

        // ArcGIS Server only wants the numeric portion of the projection ID.
        var projWords = this.projection.getCode().split(":");
        var srid = projWords[projWords.length - 1];

        var imageSize = this.getImageSize(); 
        var newParams = {
            'BBOX': bounds.toBBOX(),
            'SIZE': imageSize.w + "," + imageSize.h,
            // We always want image, the other options were json, image with a whole lotta html around it, etc.
            'F': "image",
            'BBOXSR': srid,
            'IMAGESR': srid
        };

        // Now add the filter parameters.
        if (this.layerDefs) {
            var layerDefStrList = [];
            var layerID;
            for(layerID in this.layerDefs) {
                if (this.layerDefs.hasOwnProperty(layerID)) {
                    if (this.layerDefs[layerID]) {
                        layerDefStrList.push(layerID);
                        layerDefStrList.push(":");
                        layerDefStrList.push(this.layerDefs[layerID]);
                        layerDefStrList.push(";");
                    }
                }
            }
            if (layerDefStrList.length > 0) {
                newParams['LAYERDEFS'] = layerDefStrList.join("");
            }
        }
        var requestString = this.getFullRequestString(newParams);
        return requestString;
    },
    
    /**
     * Method: setLayerFilter
     * addTile creates a tile, initializes it, and adds it to the layer div. 
     *
     * Parameters:
     * id - {String} The id of the layer to which the filter applies.
     * queryDef - {String} A sql-ish query filter, for more detail see the ESRI
     *                     documentation at http://sampleserver1.arcgisonline.com/ArcGIS/SDK/REST/export.html
     */
    setLayerFilter: function ( id, queryDef ) {
        if (!this.layerDefs) {
            this.layerDefs = {};
        }
        if (queryDef) {
            this.layerDefs[id] = queryDef;
        } else {
            delete this.layerDefs[id];
        }
    },
    
    /**
     * Method: clearLayerFilter
     * Clears layer filters, either from a specific layer,
     * or all of them.
     *
     * Parameters:
     * id - {String} The id of the layer from which to remove any
     *               filter.  If unspecified/blank, all filters
     *               will be removed.
     */
    clearLayerFilter: function ( id ) {
        if (id) {
            delete this.layerDefs[id];
        } else {
            delete this.layerDefs;
        }
    },
    
    /**
     * APIMethod: mergeNewParams
     * Catch changeParams and uppercase the new params to be merged in
     *     before calling changeParams on the super class.
     * 
     *     Once params have been changed, the tiles will be reloaded with
     *     the new parameters.
     * 
     * Parameters:
     * newParams - {Object} Hashtable of new params to use
     */
    mergeNewParams:function(newParams) {
        var upperParams = OpenLayers.Util.upperCaseObject(newParams);
        var newArguments = [upperParams];
        return OpenLayers.Layer.Grid.prototype.mergeNewParams.apply(this, 
                                                             newArguments);
    },

    CLASS_NAME: "OpenLayers.Layer.ArcGIS93Rest"
});
/* ======================================================================
    OpenLayers/Format/WKT.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format.js
 * @requires OpenLayers/Feature/Vector.js
 */

/**
 * Class: OpenLayers.Format.WKT
 * Class for reading and writing Well-Known Text.  Create a new instance
 * with the <OpenLayers.Format.WKT> constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Format>
 */
OpenLayers.Format.WKT = OpenLayers.Class(OpenLayers.Format, {
    
    /**
     * Constructor: OpenLayers.Format.WKT
     * Create a new parser for WKT
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *           this instance
     *
     * Returns:
     * {<OpenLayers.Format.WKT>} A new WKT parser.
     */
    initialize: function(options) {
        this.regExes = {
            'typeStr': /^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
            'spaces': /\s+/,
            'parenComma': /\)\s*,\s*\(/,
            'doubleParenComma': /\)\s*\)\s*,\s*\(\s*\(/,  // can't use {2} here
            'trimParens': /^\s*\(?(.*?)\)?\s*$/
        };
        OpenLayers.Format.prototype.initialize.apply(this, [options]);
    },

    /**
     * Method: read
     * Deserialize a WKT string and return a vector feature or an
     * array of vector features.  Supports WKT for POINT, MULTIPOINT,
     * LINESTRING, MULTILINESTRING, POLYGON, MULTIPOLYGON, and
     * GEOMETRYCOLLECTION.
     *
     * Parameters:
     * wkt - {String} A WKT string
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>|Array} A feature or array of features for
     * GEOMETRYCOLLECTION WKT.
     */
    read: function(wkt) {
        var features, type, str;
        wkt = wkt.replace(/[\n\r]/g, " ");
        var matches = this.regExes.typeStr.exec(wkt);
        if(matches) {
            type = matches[1].toLowerCase();
            str = matches[2];
            if(this.parse[type]) {
                features = this.parse[type].apply(this, [str]);
            }
            if (this.internalProjection && this.externalProjection) {
                if (features && 
                    features.CLASS_NAME == "OpenLayers.Feature.Vector") {
                    features.geometry.transform(this.externalProjection,
                                                this.internalProjection);
                } else if (features &&
                           type != "geometrycollection" &&
                           typeof features == "object") {
                    for (var i=0, len=features.length; i<len; i++) {
                        var component = features[i];
                        component.geometry.transform(this.externalProjection,
                                                     this.internalProjection);
                    }
                }
            }
        }    
        return features;
    },

    /**
     * Method: write
     * Serialize a feature or array of features into a WKT string.
     *
     * Parameters:
     * features - {<OpenLayers.Feature.Vector>|Array} A feature or array of
     *            features
     *
     * Returns:
     * {String} The WKT string representation of the input geometries
     */
    write: function(features) {
        var collection, geometry, type, data, isCollection;
        if (features.constructor == Array) {
            collection = features;
            isCollection = true;
        } else {
            collection = [features];
            isCollection = false;
        }
        var pieces = [];
        if (isCollection) {
            pieces.push('GEOMETRYCOLLECTION(');
        }
        for (var i=0, len=collection.length; i<len; ++i) {
            if (isCollection && i>0) {
                pieces.push(',');
            }
            geometry = collection[i].geometry;
            pieces.push(this.extractGeometry(geometry));
        }
        if (isCollection) {
            pieces.push(')');
        }
        return pieces.join('');
    },

    /**
     * Method: extractGeometry
     * Entry point to construct the WKT for a single Geometry object.
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry.Geometry>}
     *
     * Returns:
     * {String} A WKT string of representing the geometry
     */
    extractGeometry: function(geometry) {
        var type = geometry.CLASS_NAME.split('.')[2].toLowerCase();
        if (!this.extract[type]) {
            return null;
        }
        if (this.internalProjection && this.externalProjection) {
            geometry = geometry.clone();
            geometry.transform(this.internalProjection, this.externalProjection);
        }                       
        var wktType = type == 'collection' ? 'GEOMETRYCOLLECTION' : type.toUpperCase();
        var data = wktType + '(' + this.extract[type].apply(this, [geometry]) + ')';
        return data;
    },
    
    /**
     * Object with properties corresponding to the geometry types.
     * Property values are functions that do the actual data extraction.
     */
    extract: {
        /**
         * Return a space delimited string of point coordinates.
         * @param {OpenLayers.Geometry.Point} point
         * @returns {String} A string of coordinates representing the point
         */
        'point': function(point) {
            return point.x + ' ' + point.y;
        },

        /**
         * Return a comma delimited string of point coordinates from a multipoint.
         * @param {OpenLayers.Geometry.MultiPoint} multipoint
         * @returns {String} A string of point coordinate strings representing
         *                  the multipoint
         */
        'multipoint': function(multipoint) {
            var array = [];
            for(var i=0, len=multipoint.components.length; i<len; ++i) {
                array.push('(' +
                           this.extract.point.apply(this, [multipoint.components[i]]) +
                           ')');
            }
            return array.join(',');
        },
        
        /**
         * Return a comma delimited string of point coordinates from a line.
         * @param {OpenLayers.Geometry.LineString} linestring
         * @returns {String} A string of point coordinate strings representing
         *                  the linestring
         */
        'linestring': function(linestring) {
            var array = [];
            for(var i=0, len=linestring.components.length; i<len; ++i) {
                array.push(this.extract.point.apply(this, [linestring.components[i]]));
            }
            return array.join(',');
        },

        /**
         * Return a comma delimited string of linestring strings from a multilinestring.
         * @param {OpenLayers.Geometry.MultiLineString} multilinestring
         * @returns {String} A string of of linestring strings representing
         *                  the multilinestring
         */
        'multilinestring': function(multilinestring) {
            var array = [];
            for(var i=0, len=multilinestring.components.length; i<len; ++i) {
                array.push('(' +
                           this.extract.linestring.apply(this, [multilinestring.components[i]]) +
                           ')');
            }
            return array.join(',');
        },
        
        /**
         * Return a comma delimited string of linear ring arrays from a polygon.
         * @param {OpenLayers.Geometry.Polygon} polygon
         * @returns {String} An array of linear ring arrays representing the polygon
         */
        'polygon': function(polygon) {
            var array = [];
            for(var i=0, len=polygon.components.length; i<len; ++i) {
                array.push('(' +
                           this.extract.linestring.apply(this, [polygon.components[i]]) +
                           ')');
            }
            return array.join(',');
        },

        /**
         * Return an array of polygon arrays from a multipolygon.
         * @param {OpenLayers.Geometry.MultiPolygon} multipolygon
         * @returns {String} An array of polygon arrays representing
         *                  the multipolygon
         */
        'multipolygon': function(multipolygon) {
            var array = [];
            for(var i=0, len=multipolygon.components.length; i<len; ++i) {
                array.push('(' +
                           this.extract.polygon.apply(this, [multipolygon.components[i]]) +
                           ')');
            }
            return array.join(',');
        },

        /**
         * Return the WKT portion between 'GEOMETRYCOLLECTION(' and ')' for an <OpenLayers.Geometry.Collection>
         * @param {OpenLayers.Geometry.Collection} collection
         * @returns {String} internal WKT representation of the collection
         */
        'collection': function(collection) {
            var array = [];
            for(var i=0, len=collection.components.length; i<len; ++i) {
                array.push(this.extractGeometry.apply(this, [collection.components[i]]));
            }
            return array.join(',');
        }

    },

    /**
     * Object with properties corresponding to the geometry types.
     * Property values are functions that do the actual parsing.
     */
    parse: {
        /**
         * Return point feature given a point WKT fragment.
         * @param {String} str A WKT fragment representing the point
         * @returns {OpenLayers.Feature.Vector} A point feature
         * @private
         */
        'point': function(str) {
            var coords = OpenLayers.String.trim(str).split(this.regExes.spaces);
            return new OpenLayers.Feature.Vector(
                new OpenLayers.Geometry.Point(coords[0], coords[1])
            );
        },

        /**
         * Return a multipoint feature given a multipoint WKT fragment.
         * @param {String} str A WKT fragment representing the multipoint
         * @returns {OpenLayers.Feature.Vector} A multipoint feature
         * @private
         */
        'multipoint': function(str) {
            var point;
            var points = OpenLayers.String.trim(str).split(',');
            var components = [];
            for(var i=0, len=points.length; i<len; ++i) {
                point = points[i].replace(this.regExes.trimParens, '$1');
                components.push(this.parse.point.apply(this, [point]).geometry);
            }
            return new OpenLayers.Feature.Vector(
                new OpenLayers.Geometry.MultiPoint(components)
            );
        },
        
        /**
         * Return a linestring feature given a linestring WKT fragment.
         * @param {String} str A WKT fragment representing the linestring
         * @returns {OpenLayers.Feature.Vector} A linestring feature
         * @private
         */
        'linestring': function(str) {
            var points = OpenLayers.String.trim(str).split(',');
            var components = [];
            for(var i=0, len=points.length; i<len; ++i) {
                components.push(this.parse.point.apply(this, [points[i]]).geometry);
            }
            return new OpenLayers.Feature.Vector(
                new OpenLayers.Geometry.LineString(components)
            );
        },

        /**
         * Return a multilinestring feature given a multilinestring WKT fragment.
         * @param {String} str A WKT fragment representing the multilinestring
         * @returns {OpenLayers.Feature.Vector} A multilinestring feature
         * @private
         */
        'multilinestring': function(str) {
            var line;
            var lines = OpenLayers.String.trim(str).split(this.regExes.parenComma);
            var components = [];
            for(var i=0, len=lines.length; i<len; ++i) {
                line = lines[i].replace(this.regExes.trimParens, '$1');
                components.push(this.parse.linestring.apply(this, [line]).geometry);
            }
            return new OpenLayers.Feature.Vector(
                new OpenLayers.Geometry.MultiLineString(components)
            );
        },
        
        /**
         * Return a polygon feature given a polygon WKT fragment.
         * @param {String} str A WKT fragment representing the polygon
         * @returns {OpenLayers.Feature.Vector} A polygon feature
         * @private
         */
        'polygon': function(str) {
            var ring, linestring, linearring;
            var rings = OpenLayers.String.trim(str).split(this.regExes.parenComma);
            var components = [];
            for(var i=0, len=rings.length; i<len; ++i) {
                ring = rings[i].replace(this.regExes.trimParens, '$1');
                linestring = this.parse.linestring.apply(this, [ring]).geometry;
                linearring = new OpenLayers.Geometry.LinearRing(linestring.components);
                components.push(linearring);
            }
            return new OpenLayers.Feature.Vector(
                new OpenLayers.Geometry.Polygon(components)
            );
        },

        /**
         * Return a multipolygon feature given a multipolygon WKT fragment.
         * @param {String} str A WKT fragment representing the multipolygon
         * @returns {OpenLayers.Feature.Vector} A multipolygon feature
         * @private
         */
        'multipolygon': function(str) {
            var polygon;
            var polygons = OpenLayers.String.trim(str).split(this.regExes.doubleParenComma);
            var components = [];
            for(var i=0, len=polygons.length; i<len; ++i) {
                polygon = polygons[i].replace(this.regExes.trimParens, '$1');
                components.push(this.parse.polygon.apply(this, [polygon]).geometry);
            }
            return new OpenLayers.Feature.Vector(
                new OpenLayers.Geometry.MultiPolygon(components)
            );
        },

        /**
         * Return an array of features given a geometrycollection WKT fragment.
         * @param {String} str A WKT fragment representing the geometrycollection
         * @returns {Array} An array of OpenLayers.Feature.Vector
         * @private
         */
        'geometrycollection': function(str) {
            // separate components of the collection with |
            str = str.replace(/,\s*([A-Za-z])/g, '|$1');
            var wktArray = OpenLayers.String.trim(str).split('|');
            var components = [];
            for(var i=0, len=wktArray.length; i<len; ++i) {
                components.push(OpenLayers.Format.WKT.prototype.read.apply(this,[wktArray[i]]));
            }
            return components;
        }

    },

    CLASS_NAME: "OpenLayers.Format.WKT" 
});     
/* ======================================================================
    OpenLayers/Handler/Hover.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler.js
 */

/**
 * Class: OpenLayers.Handler.Hover
 * The hover handler is to be used to emulate mouseovers on objects
 *      on the map that aren't DOM elements. For example one can use
 *      this handler to send WMS/GetFeatureInfo requests as the user
 *      moves the mouve over the map.
 * 
 * Inherits from:
 *  - <OpenLayers.Handler> 
 */
OpenLayers.Handler.Hover = OpenLayers.Class(OpenLayers.Handler, {

    /**
     * APIProperty: delay
     * {Integer} - Number of milliseconds between mousemoves before
     *      the event is considered a hover. Default is 500.
     */
    delay: 500,
    
    /**
     * APIProperty: pixelTolerance
     * {Integer} - Maximum number of pixels between mousemoves for
     *      an event to be considered a hover. Default is null.
     */
    pixelTolerance: null,

    /**
     * APIProperty: stopMove
     * {Boolean} - Stop other listeners from being notified on mousemoves.
     *      Default is false.
     */
    stopMove: false,

    /**
     * Property: px
     * {<OpenLayers.Pixel>} - The location of the last mousemove, expressed
     *      in pixels.
     */
    px: null,

    /**
     * Property: timerId
     * {Number} - The id of the timer.
     */
    timerId: null,
 
    /**
     * Constructor: OpenLayers.Handler.Hover
     * Construct a hover handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that initialized this
     *     handler.  The control is assumed to have a valid map property; that
     *     map is used in the handler's own setMap method.
     * callbacks - {Object} An object with keys corresponding to callbacks
     *     that will be called by the handler. The callbacks should
     *     expect to receive a single argument, the event. Callbacks for
     *     'move', the mouse is moving, and 'pause', the mouse is pausing,
     *     are supported.
     * options - {Object} An optional object whose properties will be set on
     *     the handler.
     */

    /**
     * Method: mousemove
     * Called when the mouse moves on the map.
     *
     * Parameters:
     * evt - {<OpenLayers.Event>}
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    mousemove: function(evt) {
        if(this.passesTolerance(evt.xy)) {
            this.clearTimer();
            this.callback('move', [evt]);
            this.px = evt.xy;
            // clone the evt so original properties can be accessed even
            // if the browser deletes them during the delay
            evt = OpenLayers.Util.extend({}, evt);
            this.timerId = window.setTimeout(
                OpenLayers.Function.bind(this.delayedCall, this, evt),
                this.delay
            );
        }
        return !this.stopMove;
    },

    /**
     * Method: mouseout
     * Called when the mouse goes out of the map.
     *
     * Parameters:
     * evt - {<OpenLayers.Event>}
     *
     * Returns:
     * {Boolean} Continue propagating this event.
     */
    mouseout: function(evt) {
        if (OpenLayers.Util.mouseLeft(evt, this.map.viewPortDiv)) {
            this.clearTimer();
            this.callback('move', [evt]);
        }
        return true;
    },

    /**
     * Method: passesTolerance
     * Determine whether the mouse move is within the optional pixel tolerance.
     *
     * Parameters:
     * px - {<OpenLayers.Pixel>}
     *
     * Returns:
     * {Boolean} The mouse move is within the pixel tolerance.
     */
    passesTolerance: function(px) {
        var passes = true;
        if(this.pixelTolerance && this.px) {
            var dpx = Math.sqrt(
                Math.pow(this.px.x - px.x, 2) +
                Math.pow(this.px.y - px.y, 2)
            );
            if(dpx < this.pixelTolerance) {
                passes = false;
            }
        }
        return passes;
    },

    /**
     * Method: clearTimer
     * Clear the timer and set <timerId> to null.
     */
    clearTimer: function() {
        if(this.timerId != null) {
            window.clearTimeout(this.timerId);
            this.timerId = null;
        }
    },

    /**
     * Method: delayedCall
     * Triggers pause callback.
     *
     * Parameters:
     * evt - {<OpenLayers.Event>}
     */
    delayedCall: function(evt) {
        this.callback('pause', [evt]);
    },

    /**
     * APIMethod: deactivate
     * Deactivate the handler.
     *
     * Returns:
     * {Boolean} The handler was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = false;
        if(OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            this.clearTimer();
            deactivated = true;
        }
        return deactivated;
    },

    CLASS_NAME: "OpenLayers.Handler.Hover"
});
/* ======================================================================
    OpenLayers/Control/GetFeature.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Click.js
 * @requires OpenLayers/Handler/Box.js
 * @requires OpenLayers/Handler/Hover.js
 * @requires OpenLayers/Filter/Spatial.js
 */

/**
 * Class: OpenLayers.Control.GetFeature
 * Gets vector features for locations underneath the mouse cursor. Can be
 *     configured to act on click, hover or dragged boxes. Uses an
 *     <OpenLayers.Protocol> that supports spatial filters to retrieve
 *     features from a server and fires events that notify applications of the
 *     selected features. 
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.GetFeature = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: protocol
     * {<OpenLayers.Protocol>} Required. The protocol used for fetching
     *     features.
     */
    protocol: null,
    
    /**
     * APIProperty: multipleKey
     * {String} An event modifier ('altKey' or 'shiftKey') that temporarily sets
     *     the <multiple> property to true.  Default is null.
     */
    multipleKey: null,
    
    /**
     * APIProperty: toggleKey
     * {String} An event modifier ('altKey' or 'shiftKey') that temporarily sets
     *     the <toggle> property to true.  Default is null.
     */
    toggleKey: null,
    
    /**
     * Property: modifiers
     * {Object} The event modifiers to use, according to the current event
     *     being handled by this control's handlers
     */
    modifiers: null,
    
    /**
     * APIProperty: multiple
     * {Boolean} Allow selection of multiple geometries.  Default is false.
     */
    multiple: false, 

    /**
     * APIProperty: click
     * {Boolean} Use a click handler for selecting/unselecting features. If
     *     both <click> and <box> are set to true, the click handler takes
     *     precedence over the box handler if a box with zero extent was
     *     selected.  Default is true.
     */
    click: true,

    /**
     * APIProperty: single
     * {Boolean} Tells whether select by click should select a single
     *     feature. If set to false, all matching features are selected.
     *     If set to true, only the best matching feature is selected.
     *     This option has an effect only of the <click> option is set
     *     to true. Default is true.
     */
    single: true,
    
    /**
     * APIProperty: clickout
     * {Boolean} Unselect features when clicking outside any feature.
     *     Applies only if <click> is true.  Default is true.
     */
    clickout: true,
    
    /**
     * APIProperty: toggle
     * {Boolean} Unselect a selected feature on click.  Applies only if
     *     <click> is true.  Default is false.
     */
    toggle: false,

    /**
     * APIProperty: clickTolerance
     * {Integer} Tolerance for the filter query in pixels. This has the
     *     same effect as the tolerance parameter on WMS GetFeatureInfo
     *     requests.  Will be ignored for box selections.  Applies only if
     *     <click> or <hover> is true.  Default is 5.  Note that this not
     *     only affects requests on click, but also on hover.
     */
    clickTolerance: 5,
    
    /**
     * APIProperty: hover
     * {Boolean} Send feature requests on mouse moves.  Default is false.
     */
    hover: false,

    /**
     * APIProperty: box
     * {Boolean} Allow feature selection by drawing a box. If set to
     *     true set <click> to false to disable the click handler and
     *     rely on the box handler only, even for "zero extent" boxes.
     *     See the description of the <click> option for additional
     *     information.  Default is false.
     */
    box: false,
    
    /**
     * APIProperty: maxFeatures
     * {Integer} Maximum number of features to return from a query in single mode
     *     if supported by the <protocol>. This set of features is then used to
     *     determine the best match client-side. Default is 10.
     */
    maxFeatures: 10,
    
    /**
     * Property: features
     * {Object} Hash of {<OpenLayers.Feature.Vector>}, keyed by fid, holding
     *     the currently selected features
     */
    features: null,
    
    /**
     * Proeprty: hoverFeature
     * {<OpenLayers.Feature.Vector>} The feature currently selected by the
     *     hover handler
     */
    hoverFeature: null,
    
    /**
     * APIProperty: handlerOptions
     * {Object} Additional options for the handlers used by this control. This
     *     is a hash with the keys "click", "box" and "hover".
     */
    handlerOptions: null,
    
    /**
     * Property: handlers
     * {Object} Object with references to multiple <OpenLayers.Handler>
     *     instances.
     */
    handlers: null,

    /**
     * Property: hoverResponse
     * {<OpenLayers.Protocol.Response>} The response object associated with
     *     the currently running hover request (if any).
     */
    hoverResponse: null,
    
    /**
     * Property: filterType
     * {<String>} The type of filter to use when sending off a request. 
     *     Possible values: 
     *     OpenLayers.Filter.Spatial.<BBOX|INTERSECTS|WITHIN|CONTAINS>
     *     Defaults to: OpenLayers.Filter.Spatial.BBOX
     */
    filterType: OpenLayers.Filter.Spatial.BBOX,

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforefeatureselected - Triggered when <click> is true before a
     *      feature is selected. The event object has a feature property with
     *      the feature about to select
     * featureselected - Triggered when <click> is true and a feature is
     *      selected. The event object has a feature property with the
     *      selected feature
     * beforefeaturesselected - Triggered when <click> is true before a
     *      set of features is selected. The event object is an array of
     *      feature properties with the features about to be selected.  
     *      Return false after receiving this event to discontinue processing
     *      of all featureselected events and the featuresselected event.
     * featuresselected - Triggered when <click> is true and a set of
     *      features is selected.  The event object is an array of feature
     *      properties of the selected features
     * featureunselected - Triggered when <click> is true and a feature is
     *      unselected. The event object has a feature property with the
     *      unselected feature
     * clickout - Triggered when when <click> is true and no feature was
     *      selected.
     * hoverfeature - Triggered when <hover> is true and the mouse has
     *      stopped over a feature
     * outfeature - Triggered when <hover> is true and the mouse moves
     *      moved away from a hover-selected feature
     */

    /**
     * Constructor: OpenLayers.Control.GetFeature
     * Create a new control for fetching remote features.
     *
     * Parameters:
     * options - {Object} A configuration object which at least has to contain
     *     a <protocol> property (if not, it has to be set before a request is
     *     made)
     */
    initialize: function(options) {
        options.handlerOptions = options.handlerOptions || {};

        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        
        this.features = {};

        this.handlers = {};
        
        if(this.click) {
            this.handlers.click = new OpenLayers.Handler.Click(this,
                {click: this.selectClick}, this.handlerOptions.click || {});
        }

        if(this.box) {
            this.handlers.box = new OpenLayers.Handler.Box(
                this, {done: this.selectBox},
                OpenLayers.Util.extend(this.handlerOptions.box, {
                    boxDivClassName: "olHandlerBoxSelectFeature"
                })
            ); 
        }
        
        if(this.hover) {
            this.handlers.hover = new OpenLayers.Handler.Hover(
                this, {'move': this.cancelHover, 'pause': this.selectHover},
                OpenLayers.Util.extend(this.handlerOptions.hover, {
                    'delay': 250,
                    'pixelTolerance': 2
                })
            );
        }
    },
    
    /**
     * Method: activate
     * Activates the control.
     * 
     * Returns:
     * {Boolean} The control was effectively activated.
     */
    activate: function () {
        if (!this.active) {
            for(var i in this.handlers) {
                this.handlers[i].activate();
            }
        }
        return OpenLayers.Control.prototype.activate.apply(
            this, arguments
        );
    },

    /**
     * Method: deactivate
     * Deactivates the control.
     * 
     * Returns:
     * {Boolean} The control was effectively deactivated.
     */
    deactivate: function () {
        if (this.active) {
            for(var i in this.handlers) {
                this.handlers[i].deactivate();
            }
        }
        return OpenLayers.Control.prototype.deactivate.apply(
            this, arguments
        );
    },
    
    /**
     * Method: selectClick
     * Called on click
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    selectClick: function(evt) {
        var bounds = this.pixelToBounds(evt.xy);
        
        this.setModifiers(evt);
        this.request(bounds, {single: this.single});
    },

    /**
     * Method: selectBox
     * Callback from the handlers.box set up when <box> selection is on
     *
     * Parameters:
     * position - {<OpenLayers.Bounds>|Object} An OpenLayers.Bounds or
     * an object with a 'left', 'bottom', 'right' and 'top' properties.
     */
    selectBox: function(position) {
        var bounds;
        if (position instanceof OpenLayers.Bounds) {
            var minXY = this.map.getLonLatFromPixel({
                x: position.left,
                y: position.bottom
            });
            var maxXY = this.map.getLonLatFromPixel({
                x: position.right,
                y: position.top
            });
            bounds = new OpenLayers.Bounds(
                minXY.lon, minXY.lat, maxXY.lon, maxXY.lat
            );
            
        } else {
            if(this.click) {
                // box without extent - let the click handler take care of it
                return;
            }
            bounds = this.pixelToBounds(position);
        }
        this.setModifiers(this.handlers.box.dragHandler.evt);
        this.request(bounds);
    },
    
    /**
     * Method: selectHover
     * Callback from the handlers.hover set up when <hover> selection is on
     *
     * Parameters:
     * evt - {Object} event object with an xy property
     */
    selectHover: function(evt) {
        var bounds = this.pixelToBounds(evt.xy);
        this.request(bounds, {single: true, hover: true});
    },

    /**
     * Method: cancelHover
     * Callback from the handlers.hover set up when <hover> selection is on
     */
    cancelHover: function() {
        if (this.hoverResponse) {
            this.protocol.abort(this.hoverResponse);
            this.hoverResponse = null;

            OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
        }
    },

    /**
     * Method: request
     * Sends a GetFeature request to the WFS
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} bounds for the request's BBOX filter
     * options - {Object} additional options for this method.
     * 
     * Supported options include:
     * single - {Boolean} A single feature should be returned.
     *     Note that this will be ignored if the protocol does not
     *     return the geometries of the features.
     * hover - {Boolean} Do the request for the hover handler.
     */
    request: function(bounds, options) {
        options = options || {};
        var filter = new OpenLayers.Filter.Spatial({
            type: this.filterType, 
            value: bounds
        });
        
        // Set the cursor to "wait" to tell the user we're working.
        OpenLayers.Element.addClass(this.map.viewPortDiv, "olCursorWait");

        var response = this.protocol.read({
            maxFeatures: options.single == true ? this.maxFeatures : undefined,
            filter: filter,
            callback: function(result) {
                if(result.success()) {
                    if(result.features.length) {
                        if(options.single == true) {
                            this.selectBestFeature(result.features,
                                bounds.getCenterLonLat(), options);
                        } else {
                            this.select(result.features);
                        }
                    } else if(options.hover) {
                        this.hoverSelect();
                    } else {
                        this.events.triggerEvent("clickout");
                        if(this.clickout) {
                            this.unselectAll();
                        }
                    }
                }
                // Reset the cursor.
                OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
            },
            scope: this
        });
        if(options.hover == true) {
            this.hoverResponse = response;
        }
    },

    /**
     * Method: selectBestFeature
     * Selects the feature from an array of features that is the best match
     *     for the click position.
     * 
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)}
     * clickPosition - {<OpenLayers.LonLat>}
     * options - {Object} additional options for this method
     * 
     * Supported options include:
     * hover - {Boolean} Do the selection for the hover handler.
     */
    selectBestFeature: function(features, clickPosition, options) {
        options = options || {};
        if(features.length) {
            var point = new OpenLayers.Geometry.Point(clickPosition.lon,
                clickPosition.lat);
            var feature, resultFeature, dist;
            var minDist = Number.MAX_VALUE;
            for(var i=0; i<features.length; ++i) {
                feature = features[i];
                if(feature.geometry) {
                    dist = point.distanceTo(feature.geometry, {edge: false});
                    if(dist < minDist) {
                        minDist = dist;
                        resultFeature = feature;
                        if(minDist == 0) {
                            break;
                        }
                    }
                }
            }
            
            if(options.hover == true) {
                this.hoverSelect(resultFeature);
            } else {
                this.select(resultFeature || features);
            } 
        }
    },
    
    /**
     * Method: setModifiers
     * Sets the multiple and toggle modifiers according to the current event
     * 
     * Parameters:
     * evt - {<OpenLayers.Event>}
     */
    setModifiers: function(evt) {
        this.modifiers = {
            multiple: this.multiple || (this.multipleKey && evt[this.multipleKey]),
            toggle: this.toggle || (this.toggleKey && evt[this.toggleKey])
        };        
    },

    /**
     * Method: select
     * Add feature to the hash of selected features and trigger the
     * featureselected and featuresselected events.
     * 
     * Parameters:
     * features - {<OpenLayers.Feature.Vector>} or an array of features
     */
    select: function(features) {
        if(!this.modifiers.multiple && !this.modifiers.toggle) {
            this.unselectAll();
        }
        if(!(OpenLayers.Util.isArray(features))) {
            features = [features];
        }
        
        var cont = this.events.triggerEvent("beforefeaturesselected", {
            features: features
        });
        if(cont !== false) {
            var selectedFeatures = [];
            var feature;
            for(var i=0, len=features.length; i<len; ++i) {
                feature = features[i];
                if(this.features[feature.fid || feature.id]) {
                    if(this.modifiers.toggle) {
                        this.unselect(this.features[feature.fid || feature.id]);
                    }
                } else {
                    cont = this.events.triggerEvent("beforefeatureselected", {
                        feature: feature
                    });
                    if(cont !== false) {
                        this.features[feature.fid || feature.id] = feature;
                        selectedFeatures.push(feature);
                
                        this.events.triggerEvent("featureselected",
                            {feature: feature});
                    }
                }
            }
            this.events.triggerEvent("featuresselected", {
                features: selectedFeatures
            });
        }
    },
    
    /**
     * Method: hoverSelect
     * Sets/unsets the <hoverFeature>
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} the feature to hover-select.
     *     If none is provided, the current <hoverFeature> will be nulled and
     *     the outfeature event will be triggered.
     */
    hoverSelect: function(feature) {
        var fid = feature ? feature.fid || feature.id : null;
        var hfid = this.hoverFeature ?
            this.hoverFeature.fid || this.hoverFeature.id : null;
            
        if(hfid && hfid != fid) {
            this.events.triggerEvent("outfeature",
                {feature: this.hoverFeature});
            this.hoverFeature = null;
        }
        if(fid && fid != hfid) {
            this.events.triggerEvent("hoverfeature", {feature: feature});
            this.hoverFeature = feature;
        }
    },

    /**
     * Method: unselect
     * Remove feature from the hash of selected features and trigger the
     * featureunselected event.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     */
    unselect: function(feature) {
        delete this.features[feature.fid || feature.id];
        this.events.triggerEvent("featureunselected", {feature: feature});
    },
    
    /**
     * Method: unselectAll
     * Unselect all selected features.
     */
    unselectAll: function() {
        // we'll want an option to supress notification here
        for(var fid in this.features) {
            this.unselect(this.features[fid]);
        }
    },
    
    /** 
     * Method: setMap
     * Set the map property for the control. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        for(var i in this.handlers) {
            this.handlers[i].setMap(map);
        }
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
    },
    
    /**
     * Method: pixelToBounds
     * Takes a pixel as argument and creates bounds after adding the
     * <clickTolerance>.
     * 
     * Parameters:
     * pixel - {<OpenLayers.Pixel>}
     */
    pixelToBounds: function(pixel) {
        var llPx = pixel.add(-this.clickTolerance/2, this.clickTolerance/2);
        var urPx = pixel.add(this.clickTolerance/2, -this.clickTolerance/2);
        var ll = this.map.getLonLatFromPixel(llPx);
        var ur = this.map.getLonLatFromPixel(urPx);
        return new OpenLayers.Bounds(ll.lon, ll.lat, ur.lon, ur.lat);
    },

    CLASS_NAME: "OpenLayers.Control.GetFeature"
});
/* ======================================================================
    OpenLayers/Format/QueryStringFilter.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Console.js
 * @requires OpenLayers/Format.js
 * @requires OpenLayers/Filter/Spatial.js
 * @requires OpenLayers/Filter/Comparison.js
 * @requires OpenLayers/Filter/Logical.js
 */

/**
 * Class: OpenLayers.Format.QueryStringFilter
 * Parser for reading a query string and creating a simple filter.
 *
 * Inherits from:
 *  - <OpenLayers.Format>
 */
OpenLayers.Format.QueryStringFilter = (function() {

    /** 
     * Map the OpenLayers.Filter.Comparison types to the operation strings of 
     * the protocol.
     */
    var cmpToStr = {};
    cmpToStr[OpenLayers.Filter.Comparison.EQUAL_TO] = "eq";
    cmpToStr[OpenLayers.Filter.Comparison.NOT_EQUAL_TO] = "ne";
    cmpToStr[OpenLayers.Filter.Comparison.LESS_THAN] = "lt";
    cmpToStr[OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO] = "lte";
    cmpToStr[OpenLayers.Filter.Comparison.GREATER_THAN] = "gt";
    cmpToStr[OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO] = "gte";
    cmpToStr[OpenLayers.Filter.Comparison.LIKE] = "ilike";

    /**
     * Function: regex2value
     * Convert the value from a regular expression string to a LIKE/ILIKE
     * string known to the web service.
     *
     * Parameters:
     * value - {String} The regex string.
     *
     * Returns:
     * {String} The converted string.
     */
    function regex2value(value) {

        // highly sensitive!! Do not change this without running the
        // Protocol/HTTP.html unit tests

        // convert % to \%
        value = value.replace(/%/g, "\\%");

        // convert \\. to \\_ (\\.* occurences converted later)
        value = value.replace(/\\\\\.(\*)?/g, function($0, $1) {
            return $1 ? $0 : "\\\\_";
        });

        // convert \\.* to \\%
        value = value.replace(/\\\\\.\*/g, "\\\\%");

        // convert . to _ (\. and .* occurences converted later)
        value = value.replace(/(\\)?\.(\*)?/g, function($0, $1, $2) {
            return $1 || $2 ? $0 : "_";
        });

        // convert .* to % (\.* occurnces converted later)
        value = value.replace(/(\\)?\.\*/g, function($0, $1) {
            return $1 ? $0 : "%";
        });

        // convert \. to .
        value = value.replace(/\\\./g, ".");

        // replace \* with * (watching out for \\*)
        value = value.replace(/(\\)?\\\*/g, function($0, $1) {
            return $1 ? $0 : "*";
        });

        return value;
    }
    
    return OpenLayers.Class(OpenLayers.Format, {
        
        /**
         * Property: wildcarded.
         * {Boolean} If true percent signs are added around values
         *     read from LIKE filters, for example if the protocol
         *     read method is passed a LIKE filter whose property
         *     is "foo" and whose value is "bar" the string
         *     "foo__ilike=%bar%" will be sent in the query string;
         *     defaults to false.
         */
        wildcarded: false,

        /**
         * APIProperty: srsInBBOX
         * {Boolean} Include the SRS identifier in BBOX query string parameter.  
         *     Default is false.  If true and the layer has a projection object set,
         *     any BBOX filter will be serialized with a fifth item identifying the
         *     projection.  E.g. bbox=-1000,-1000,1000,1000,EPSG:900913
         */
        srsInBBOX: false,

        /**
         * APIMethod: write
         * Serialize an <OpenLayers.Filter> objects using the "simple" filter syntax for 
         *     query string parameters.  This function must be called as a method of
         *     a protocol instance.
         *
         * Parameters:
         * filter - {<OpenLayers.Filter>} filter to convert.
         * params - {Object} The parameters object.
         *
         * Returns:
         * {Object} The resulting parameters object.
         */
        write: function(filter, params) {
            params = params || {};
            var className = filter.CLASS_NAME;
            var filterType = className.substring(className.lastIndexOf(".") + 1);
            switch (filterType) {
                case "Spatial":
                    switch (filter.type) {
                        case OpenLayers.Filter.Spatial.BBOX:
                            params.bbox = filter.value.toArray();
                            if (this.srsInBBOX && filter.projection) {
                                params.bbox.push(filter.projection.getCode());
                            }
                            break;
                        case OpenLayers.Filter.Spatial.DWITHIN:
                            params.tolerance = filter.distance;
                            // no break here
                        case OpenLayers.Filter.Spatial.WITHIN:
                            params.lon = filter.value.x;
                            params.lat = filter.value.y;
                            break;
                        default:
                            OpenLayers.Console.warn(
                                "Unknown spatial filter type " + filter.type);
                    }
                    break;
                case "Comparison":
                    var op = cmpToStr[filter.type];
                    if (op !== undefined) {
                        var value = filter.value;
                        if (filter.type == OpenLayers.Filter.Comparison.LIKE) {
                            value = regex2value(value);
                            if (this.wildcarded) {
                                value = "%" + value + "%";
                            }
                        }
                        params[filter.property + "__" + op] = value;
                        params.queryable = params.queryable || [];
                        params.queryable.push(filter.property);
                    } else {
                        OpenLayers.Console.warn(
                            "Unknown comparison filter type " + filter.type);
                    }
                    break;
                case "Logical":
                    if (filter.type === OpenLayers.Filter.Logical.AND) {
                        for (var i=0,len=filter.filters.length; i<len; i++) {
                            params = this.write(filter.filters[i], params);
                        }
                    } else {
                        OpenLayers.Console.warn(
                            "Unsupported logical filter type " + filter.type);
                    }
                    break;
                default:
                    OpenLayers.Console.warn("Unknown filter type " + filterType);
            }
            return params;
        },
        
        CLASS_NAME: "OpenLayers.Format.QueryStringFilter"
        
    });


})();
/* ======================================================================
    OpenLayers/Control/MousePosition.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.MousePosition
 * The MousePosition control displays geographic coordinates of the mouse
 * pointer, as it is moved about the map.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.MousePosition = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /** 
     * Property: element
     * {DOMElement} 
     */
    element: null,
    
    /** 
     * APIProperty: prefix
     * {String}
     */
    prefix: '',
    
    /** 
     * APIProperty: separator
     * {String}
     */
    separator: ', ',
    
    /** 
     * APIProperty: suffix
     * {String}
     */
    suffix: '',
    
    /** 
     * APIProperty: numDigits
     * {Integer}
     */
    numDigits: 5,
    
    /** 
     * APIProperty: granularity
     * {Integer} 
     */
    granularity: 10,

    /**
     * APIProperty: emptyString 
     * {String} Set this to some value to set when the mouse is outside the
     *     map.
     */
    emptyString: null,
    
    /** 
     * Property: lastXy
     * {<OpenLayers.Pixel>}
     */
    lastXy: null,

    /**
     * APIProperty: displayProjection
     * {<OpenLayers.Projection>} The projection in which the 
     * mouse position is displayed
     */
    displayProjection: null, 
    
    /**
     * Constructor: OpenLayers.Control.MousePosition
     * 
     * Parameters:
     * options - {Object} Options for control.
     */

    /**
     * Method: destroy
     */
     destroy: function() {
         this.deactivate();
         OpenLayers.Control.prototype.destroy.apply(this, arguments);
     },

    /**
     * APIMethod: activate
     */
    activate: function() {
        if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
            this.map.events.register('mousemove', this, this.redraw);
            this.map.events.register('mouseout', this, this.reset);
            this.redraw();
            return true;
        } else {
            return false;
        }
    },
    
    /**
     * APIMethod: deactivate
     */
    deactivate: function() {
        if (OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
            this.map.events.unregister('mousemove', this, this.redraw);
            this.map.events.unregister('mouseout', this, this.reset);
            this.element.innerHTML = "";
            return true;
        } else {
            return false;
        }
    },

    /**
     * Method: draw
     * {DOMElement}
     */    
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);

        if (!this.element) {
            this.div.left = "";
            this.div.top = "";
            this.element = this.div;
        }
        
        return this.div;
    },
   
    /**
     * Method: redraw  
     */
    redraw: function(evt) {

        var lonLat;

        if (evt == null) {
            this.reset();
            return;
        } else {
            if (this.lastXy == null ||
                Math.abs(evt.xy.x - this.lastXy.x) > this.granularity ||
                Math.abs(evt.xy.y - this.lastXy.y) > this.granularity)
            {
                this.lastXy = evt.xy;
                return;
            }

            lonLat = this.map.getLonLatFromPixel(evt.xy);
            if (!lonLat) { 
                // map has not yet been properly initialized
                return;
            }    
            if (this.displayProjection) {
                lonLat.transform(this.map.getProjectionObject(), 
                                 this.displayProjection );
            }      
            this.lastXy = evt.xy;
            
        }
        
        var newHtml = this.formatOutput(lonLat);

        if (newHtml != this.element.innerHTML) {
            this.element.innerHTML = newHtml;
        }
    },

    /**
     * Method: reset
     */
    reset: function(evt) {
        if (this.emptyString != null) {
            this.element.innerHTML = this.emptyString;
        }
    },

    /**
     * Method: formatOutput
     * Override to provide custom display output
     *
     * Parameters:
     * lonLat - {<OpenLayers.LonLat>} Location to display
     */
    formatOutput: function(lonLat) {
        var digits = parseInt(this.numDigits);
        var newHtml =
            this.prefix +
            lonLat.lon.toFixed(digits) +
            this.separator + 
            lonLat.lat.toFixed(digits) +
            this.suffix;
        return newHtml;
    },

    CLASS_NAME: "OpenLayers.Control.MousePosition"
});
/* ======================================================================
    OpenLayers/Control/Geolocate.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Projection.js
 */

/**
 * Class: OpenLayers.Control.Geolocate
 * The Geolocate control wraps w3c geolocation API into control that can be
 * bound to a map, and generate events on location update
 *
 * To use this control requires to load the proj4js library if the projection
 * of the map is not EPSG:4326 or EPSG:900913.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Geolocate = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * locationupdated - Triggered when browser return a new position. Listeners will 
     *     receive an object with a 'position' property which is the browser.geolocation.position
     *     native object, as well as a 'point' property which is the location transformed in the 
     *     current map projection.
     * locationfailed - Triggered when geolocation has failed
     * locationuncapable - Triggered when control is activated on a browser
     *     which doesn't support geolocation
     */

    /**
     * Property: geolocation
     * {Object} The geolocation engine, as a property to be possibly mocked.
     */
    geolocation: navigator.geolocation,

    /**
     * APIProperty: bind
     * {Boolean} If true, map center will be set on location update.
     */
    bind: true,

    /**
     * APIProperty: watch
     * {Boolean} If true, position will be update regularly.
     */
    watch: false,

    /**
     * APIProperty: geolocationOptions
     * {Object} Options to pass to the navigator's geolocation API. See
     *     <http://dev.w3.org/geo/api/spec-source.html>. No specific
     *     option is passed to the geolocation API by default.
     */
    geolocationOptions: null,

    /**
     * Constructor: OpenLayers.Control.Geolocate
     * Create a new control to deal with browser geolocation API
     *
     */

    /**
     * Method: destroy
     */
    destroy: function() {
        this.deactivate();
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },

    /**
     * Method: activate
     * Activates the control.
     *
     * Returns:
     * {Boolean} The control was effectively activated.
     */
    activate: function () {
        if (!this.geolocation) {
            this.events.triggerEvent("locationuncapable");
            return false;
        }
        if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
            if (this.watch) {
                this.watchId = this.geolocation.watchPosition(
                    OpenLayers.Function.bind(this.geolocate, this),
                    OpenLayers.Function.bind(this.failure, this),
                    this.geolocationOptions
                );
            } else {
                this.getCurrentLocation();
            }
            return true;
        }
        return false;
    },

    /**
     * Method: deactivate
     * Deactivates the control.
     *
     * Returns:
     * {Boolean} The control was effectively deactivated.
     */
    deactivate: function () {
        if (this.active && this.watchId !== null) {
            this.geolocation.clearWatch(this.watchId);
        }
        return OpenLayers.Control.prototype.deactivate.apply(
            this, arguments
        );
    },

    /**
     * Method: geolocate
     * Activates the control.
     *
     */
    geolocate: function (position) {
        var center = new OpenLayers.LonLat(
            position.coords.longitude,
            position.coords.latitude
        ).transform(
            new OpenLayers.Projection("EPSG:4326"),
            this.map.getProjectionObject()
        );
        if (this.bind) {
            this.map.setCenter(center);
        }
        this.events.triggerEvent("locationupdated", {
            position: position,
            point: new OpenLayers.Geometry.Point(
                center.lon, center.lat
            )
        });
    },

    /**
     * APIMethod: getCurrentLocation
     *
     * Returns:
     * {Boolean} Returns true if a event will be fired (successfull
     * registration)
     */
    getCurrentLocation: function() {
        if (!this.active || this.watch) {
            return false;
        }
        this.geolocation.getCurrentPosition(
            OpenLayers.Function.bind(this.geolocate, this),
            OpenLayers.Function.bind(this.failure, this),
            this.geolocationOptions
        );
        return true;
    },

    /**
     * Method: failure
     * method called on browser's geolocation failure
     *
     */
    failure: function (error) {
        this.events.triggerEvent("locationfailed", {error: error});
    },

    CLASS_NAME: "OpenLayers.Control.Geolocate"
});
/* ======================================================================
    OpenLayers/Tile/UTFGrid.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Tile.js
 * @requires OpenLayers/Format/JSON.js
 */

/**
 * Class: OpenLayers.Tile.UTFGrid
 * Instances of OpenLayers.Tile.UTFGrid are used to manage 
 * UTFGrids. This is an unusual tile type in that it doesn't have a
 * rendered image; only a 'hit grid' that can be used to 
 * look up feature attributes.
 *
 * See the <OpenLayers.Tile.UTFGrid> constructor for details on constructing a
 * new instance.
 *
 * Inherits from:
 *  - <OpenLayers.Tile>
 */
OpenLayers.Tile.UTFGrid = OpenLayers.Class(OpenLayers.Tile, {

    /** 
     * Property: url
     * {String}
     * The URL of the UTFGrid file being requested. Provided by the <getURL>
     *     method. 
     */
    url: null,
    
    /**
     * Property: utfgridResolution
     * {Number}
     * Ratio of the pixel width to the width of a UTFGrid data point.  If an 
     *     entry in the grid represents a 4x4 block of pixels, the 
     *     utfgridResolution would be 4.  Default is 2.
     */
    utfgridResolution: 2,
    
    /** 
     * Property: json
     * {Object}
     * Stores the parsed JSON tile data structure. 
     */
    json: null,
    
    /** 
     * Property: format
     * {OpenLayers.Format.JSON}
     * Parser instance used to parse JSON for cross browser support.  The native
     *     JSON.parse method will be used where available (all except IE<8).
     */
    format: null,

    /** 
     * Constructor: OpenLayers.Tile.UTFGrid
     * Constructor for a new <OpenLayers.Tile.UTFGrid> instance.
     * 
     * Parameters:
     * layer - {<OpenLayers.Layer>} layer that the tile will go in.
     * position - {<OpenLayers.Pixel>}
     * bounds - {<OpenLayers.Bounds>}
     * url - {<String>} Deprecated. Remove me in 3.0.
     * size - {<OpenLayers.Size>}
     * options - {Object}
     */

    /** 
     * APIMethod: destroy
     * Clean up.
     */
    destroy: function() {
        this.clear();
        OpenLayers.Tile.prototype.destroy.apply(this, arguments);
    },
    
    /**
     * Method: draw
     * Check that a tile should be drawn, and draw it.
     * In the case of UTFGrids, "drawing" it means fetching and
     * parsing the json. 
     * 
     * Returns:
     * {Boolean} Was a tile drawn?
     */
    draw: function() {
        var drawn = OpenLayers.Tile.prototype.draw.apply(this, arguments);
        if (drawn) {
            if (this.isLoading) {
                this.abortLoading();
                //if we're already loading, send 'reload' instead of 'loadstart'.
                this.events.triggerEvent("reload"); 
            } else {
                this.isLoading = true;
                this.events.triggerEvent("loadstart");
            }
            this.url = this.layer.getURL(this.bounds);

            if (this.layer.useJSONP) {
                // Use JSONP method to avoid xbrowser policy
                var ols = new OpenLayers.Protocol.Script({
                    url: this.url,
                    callback: function(response) {
                        this.isLoading = false;
                        this.events.triggerEvent("loadend");
                        this.json = response.data;
                    },
                    scope: this
                });
                ols.read();
                this.request = ols;
            } else {
                // Use standard XHR
                this.request = OpenLayers.Request.GET({
                    url: this.url,
                    callback: function(response) {
                        this.isLoading = false;
                        this.events.triggerEvent("loadend");
                        if (response.status === 200) {
                            this.parseData(response.responseText);
                        }
                    },
                    scope: this
                });
            }
        } else {
            this.unload();
        }
        return drawn;
    },
    
    /**
     * Method: abortLoading
     * Cancel a pending request.
     */
    abortLoading: function() {
        if (this.request) {
            this.request.abort();
            delete this.request;
        }
        this.isLoading = false;
    },
    
    /**
     * Method: getFeatureInfo
     * Get feature information associated with a pixel offset.  If the pixel
     *     offset corresponds to a feature, the returned object will have id
     *     and data properties.  Otherwise, null will be returned.
     *     
     *
     * Parameters:
     * i - {Number} X-axis pixel offset (from top left of tile)
     * j - {Number} Y-axis pixel offset (from top left of tile)
     *
     * Returns:
     * {Object} Object with feature id and data properties corresponding to the 
     *     given pixel offset.
     */
    getFeatureInfo: function(i, j) {
        var info = null;
        if (this.json) {
            var id = this.getFeatureId(i, j);
            if (id !== null) {
                info = {id: id, data: this.json.data[id]};
            }
        }
        return info;
    },
    
    /**
     * Method: getFeatureId
     * Get the identifier for the feature associated with a pixel offset.
     *
     * Parameters:
     * i - {Number} X-axis pixel offset (from top left of tile)
     * j - {Number} Y-axis pixel offset (from top left of tile)
     *
     * Returns:
     * {Object} The feature identifier corresponding to the given pixel offset.
     *     Returns null if pixel doesn't correspond to a feature.
     */
    getFeatureId: function(i, j) {
        var id = null;
        if (this.json) {
            var resolution = this.utfgridResolution;
            var row = Math.floor(j / resolution);
            var col = Math.floor(i / resolution);
            var charCode = this.json.grid[row].charCodeAt(col);
            var index = this.indexFromCharCode(charCode);
            var keys = this.json.keys;
            if (!isNaN(index) && (index in keys)) {
                id = keys[index];
            }
        }
        return id;
    },
    
    /**
     * Method: indexFromCharCode
     * Given a character code for one of the UTFGrid "grid" characters, 
     *     resolve the integer index for the feature id in the UTFGrid "keys"
     *     array.
     *
     * Parameters:
     * charCode - {Integer}
     *
     * Returns:
     * {Integer} Index for the feature id from the keys array.
     */
    indexFromCharCode: function(charCode) {
        if (charCode >= 93) {
            charCode--;
        }
        if (charCode >= 35) {
            charCode --;
        }
        return charCode - 32;
    },
    
    /**
     * Method: parseData
     * Parse the JSON from a request
     *
     * Parameters:
     * str - {String} UTFGrid as a JSON string. 
     * 
     * Returns:
     * {Object} parsed javascript data
     */
    parseData: function(str) {
        if (!this.format) {
            this.format = new OpenLayers.Format.JSON();
        }
        this.json = this.format.read(str);
    },
    
    /** 
     * Method: clear
     * Delete data stored with this tile.
     */
    clear: function() {
        this.json = null;
    },
    
    CLASS_NAME: "OpenLayers.Tile.UTFGrid"

});
/* ======================================================================
    OpenLayers/Control/NavigationHistory.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Control/Button.js
 */

/**
 * Class: OpenLayers.Control.NavigationHistory
 * A navigation history control.  This is a meta-control, that creates two
 *     dependent controls: <previous> and <next>.  Call the trigger method
 *     on the <previous> and <next> controls to restore previous and next
 *     history states.  The previous and next controls will become active
 *     when there are available states to restore and will become deactive
 *     when there are no states to restore.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.NavigationHistory = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: type
     * {String} Note that this control is not intended to be added directly
     *     to a control panel.  Instead, add the sub-controls previous and
     *     next.  These sub-controls are button type controls that activate
     *     and deactivate themselves.  If this parent control is added to
     *     a panel, it will act as a toggle.
     */
    type: OpenLayers.Control.TYPE_TOGGLE,

    /**
     * APIProperty: previous
     * {<OpenLayers.Control>} A button type control whose trigger method restores
     *     the previous state managed by this control.
     */
    previous: null,
    
    /**
     * APIProperty: previousOptions
     * {Object} Set this property on the options argument of the constructor
     *     to set optional properties on the <previous> control.
     */
    previousOptions: null,
    
    /**
     * APIProperty: next
     * {<OpenLayers.Control>} A button type control whose trigger method restores
     *     the next state managed by this control.
     */
    next: null,

    /**
     * APIProperty: nextOptions
     * {Object} Set this property on the options argument of the constructor
     *     to set optional properties on the <next> control.
     */
    nextOptions: null,

    /**
     * APIProperty: limit
     * {Integer} Optional limit on the number of history items to retain.  If
     *     null, there is no limit.  Default is 50.
     */
    limit: 50,

    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /**
     * Property: clearOnDeactivate
     * {Boolean} Clear the history when the control is deactivated.  Default
     *     is false.
     */
    clearOnDeactivate: false,

    /**
     * Property: registry
     * {Object} An object with keys corresponding to event types.  Values
     *     are functions that return an object representing the current state.
     */
    registry: null,

    /**
     * Property: nextStack
     * {Array} Array of items in the history.
     */
    nextStack: null,

    /**
     * Property: previousStack
     * {Array} List of items in the history.  First item represents the current
     *     state.
     */
    previousStack: null,
    
    /**
     * Property: listeners
     * {Object} An object containing properties corresponding to event types.
     *     This object is used to configure the control and is modified on
     *     construction.
     */
    listeners: null,
    
    /**
     * Property: restoring
     * {Boolean} Currently restoring a history state.  This is set to true
     *     before calling restore and set to false after restore returns.
     */
    restoring: false,
    
    /**
     * Constructor: OpenLayers.Control.NavigationHistory 
     * 
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        
        this.registry = OpenLayers.Util.extend({
            "moveend": this.getState
        }, this.registry);
        
        var previousOptions = {
            trigger: OpenLayers.Function.bind(this.previousTrigger, this),
            displayClass: this.displayClass + " " + this.displayClass + "Previous"
        };
        OpenLayers.Util.extend(previousOptions, this.previousOptions);
        this.previous = new OpenLayers.Control.Button(previousOptions);
        
        var nextOptions = {
            trigger: OpenLayers.Function.bind(this.nextTrigger, this),
            displayClass: this.displayClass + " " + this.displayClass + "Next"
        };
        OpenLayers.Util.extend(nextOptions, this.nextOptions);
        this.next = new OpenLayers.Control.Button(nextOptions);

        this.clear();
    },
    
    /**
     * Method: onPreviousChange
     * Called when the previous history stack changes.
     *
     * Parameters:
     * state - {Object} An object representing the state to be restored
     *     if previous is triggered again or null if no previous states remain.
     * length - {Integer} The number of remaining previous states that can
     *     be restored.
     */
    onPreviousChange: function(state, length) {
        if(state && !this.previous.active) {
            this.previous.activate();
        } else if(!state && this.previous.active) {
            this.previous.deactivate();
        }
    },
    
    /**
     * Method: onNextChange
     * Called when the next history stack changes.
     *
     * Parameters:
     * state - {Object} An object representing the state to be restored
     *     if next is triggered again or null if no next states remain.
     * length - {Integer} The number of remaining next states that can
     *     be restored.
     */
    onNextChange: function(state, length) {
        if(state && !this.next.active) {
            this.next.activate();
        } else if(!state && this.next.active) {
            this.next.deactivate();
        }
    },
    
    /**
     * APIMethod: destroy
     * Destroy the control.
     */
    destroy: function() {
        OpenLayers.Control.prototype.destroy.apply(this);
        this.previous.destroy();
        this.next.destroy();
        this.deactivate();
        for(var prop in this) {
            this[prop] = null;
        }
    },
    
    /** 
     * Method: setMap
     * Set the map property for the control and <previous> and <next> child
     *     controls.
     *
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        this.map = map;
        this.next.setMap(map);
        this.previous.setMap(map);
    },

    /**
     * Method: draw
     * Called when the control is added to the map.
     */
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        this.next.draw();
        this.previous.draw();
    },
    
    /**
     * Method: previousTrigger
     * Restore the previous state.  If no items are in the previous history
     *     stack, this has no effect.
     *
     * Returns:
     * {Object} Item representing state that was restored.  Undefined if no
     *     items are in the previous history stack.
     */
    previousTrigger: function() {
        var current = this.previousStack.shift();
        var state = this.previousStack.shift();
        if(state != undefined) {
            this.nextStack.unshift(current);
            this.previousStack.unshift(state);
            this.restoring = true;
            this.restore(state);
            this.restoring = false;
            this.onNextChange(this.nextStack[0], this.nextStack.length);
            this.onPreviousChange(
                this.previousStack[1], this.previousStack.length - 1
            );
        } else {
            this.previousStack.unshift(current);
        }
        return state;
    },
    
    /**
     * APIMethod: nextTrigger
     * Restore the next state.  If no items are in the next history
     *     stack, this has no effect.  The next history stack is populated
     *     as states are restored from the previous history stack.
     *
     * Returns:
     * {Object} Item representing state that was restored.  Undefined if no
     *     items are in the next history stack.
     */
    nextTrigger: function() {
        var state = this.nextStack.shift();
        if(state != undefined) {
            this.previousStack.unshift(state);
            this.restoring = true;
            this.restore(state);
            this.restoring = false;
            this.onNextChange(this.nextStack[0], this.nextStack.length);
            this.onPreviousChange(
                this.previousStack[1], this.previousStack.length - 1
            );
        }
        return state;
    },
    
    /**
     * APIMethod: clear
     * Clear history.
     */
    clear: function() {
        this.previousStack = [];
        this.previous.deactivate();
        this.nextStack = [];
        this.next.deactivate();
    },

    /**
     * Method: getState
     * Get the current state and return it.
     *
     * Returns:
     * {Object} An object representing the current state.
     */
    getState: function() {
        return {
            center: this.map.getCenter(),
            resolution: this.map.getResolution(),
            projection: this.map.getProjectionObject(),
            units: this.map.getProjectionObject().getUnits() || 
                this.map.units || this.map.baseLayer.units
        };
    },

    /**
     * Method: restore
     * Update the state with the given object.
     *
     * Parameters:
     * state - {Object} An object representing the state to restore.
     */
    restore: function(state) {
        var center, zoom;
        if (this.map.getProjectionObject() == state.projection) { 
            zoom = this.map.getZoomForResolution(state.resolution);
            center = state.center;
        } else {
            center = state.center.clone();
            center.transform(state.projection, this.map.getProjectionObject());
            var sourceUnits = state.units;
            var targetUnits = this.map.getProjectionObject().getUnits() || 
                this.map.units || this.map.baseLayer.units;
            var resolutionFactor = sourceUnits && targetUnits ? 
                OpenLayers.INCHES_PER_UNIT[sourceUnits] / OpenLayers.INCHES_PER_UNIT[targetUnits] : 1;
            zoom = this.map.getZoomForResolution(resolutionFactor*state.resolution); 
        }
        this.map.setCenter(center, zoom);
    },
    
    /**
     * Method: setListeners
     * Sets functions to be registered in the listeners object.
     */
    setListeners: function() {
        this.listeners = {};
        for(var type in this.registry) {
            this.listeners[type] = OpenLayers.Function.bind(function() {
                if(!this.restoring) {
                    var state = this.registry[type].apply(this, arguments);
                    this.previousStack.unshift(state);
                    if(this.previousStack.length > 1) {
                        this.onPreviousChange(
                            this.previousStack[1], this.previousStack.length - 1
                        );
                    }
                    if(this.previousStack.length > (this.limit + 1)) {
                        this.previousStack.pop();
                    }
                    if(this.nextStack.length > 0) {
                        this.nextStack = [];
                        this.onNextChange(null, 0);
                    }
                }
                return true;
            }, this);
        }
    },

    /**
     * APIMethod: activate
     * Activate the control.  This registers any listeners.
     *
     * Returns:
     * {Boolean} Control successfully activated.
     */
    activate: function() {
        var activated = false;
        if(this.map) {
            if(OpenLayers.Control.prototype.activate.apply(this)) {
                if(this.listeners == null) {
                    this.setListeners();
                }
                for(var type in this.listeners) {
                    this.map.events.register(type, this, this.listeners[type]);
                }
                activated = true;
                if(this.previousStack.length == 0) {
                    this.initStack();
                }
            }
        }
        return activated;
    },
    
    /**
     * Method: initStack
     * Called after the control is activated if the previous history stack is
     *     empty.
     */
    initStack: function() {
        if(this.map.getCenter()) {
            this.listeners.moveend();
        }
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the control.  This unregisters any listeners.
     *
     * Returns:
     * {Boolean} Control successfully deactivated.
     */
    deactivate: function() {
        var deactivated = false;
        if(this.map) {
            if(OpenLayers.Control.prototype.deactivate.apply(this)) {
                for(var type in this.listeners) {
                    this.map.events.unregister(
                        type, this, this.listeners[type]
                    );
                }
                if(this.clearOnDeactivate) {
                    this.clear();
                }
                deactivated = true;
            }
        }
        return deactivated;
    },
    
    CLASS_NAME: "OpenLayers.Control.NavigationHistory"
});

/* ======================================================================
    OpenLayers/Protocol/HTTP.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol.js
 * @requires OpenLayers/Request/XMLHttpRequest.js
 */

/**
 * if application uses the query string, for example, for BBOX parameters,
 * OpenLayers/Format/QueryStringFilter.js should be included in the build config file
 */

/**
 * Class: OpenLayers.Protocol.HTTP
 * A basic HTTP protocol for vector layers.  Create a new instance with the
 *     <OpenLayers.Protocol.HTTP> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Protocol>
 */
OpenLayers.Protocol.HTTP = OpenLayers.Class(OpenLayers.Protocol, {

    /**
     * Property: url
     * {String} Service URL, read-only, set through the options
     *     passed to constructor.
     */
    url: null,

    /**
     * Property: headers
     * {Object} HTTP request headers, read-only, set through the options
     *     passed to the constructor,
     *     Example: {'Content-Type': 'plain/text'}
     */
    headers: null,

    /**
     * Property: params
     * {Object} Parameters of GET requests, read-only, set through the options
     *     passed to the constructor,
     *     Example: {'bbox': '5,5,5,5'}
     */
    params: null,
    
    /**
     * Property: callback
     * {Object} Function to be called when the <read>, <create>,
     *     <update>, <delete> or <commit> operation completes, read-only,
     *     set through the options passed to the constructor.
     */
    callback: null,

    /**
     * Property: scope
     * {Object} Callback execution scope, read-only, set through the
     *     options passed to the constructor.
     */
    scope: null,

    /**
     * APIProperty: readWithPOST
     * {Boolean} true if read operations are done with POST requests
     *     instead of GET, defaults to false.
     */
    readWithPOST: false,

    /**
     * APIProperty: updateWithPOST
     * {Boolean} true if update operations are done with POST requests
     *     defaults to false.
     */
    updateWithPOST: false,
    
    /**
     * APIProperty: deleteWithPOST
     * {Boolean} true if delete operations are done with POST requests
     *     defaults to false.
     *     if true, POST data is set to output of format.write().
     */
    deleteWithPOST: false,

    /**
     * Property: wildcarded.
     * {Boolean} If true percent signs are added around values
     *     read from LIKE filters, for example if the protocol
     *     read method is passed a LIKE filter whose property
     *     is "foo" and whose value is "bar" the string
     *     "foo__ilike=%bar%" will be sent in the query string;
     *     defaults to false.
     */
    wildcarded: false,

    /**
     * APIProperty: srsInBBOX
     * {Boolean} Include the SRS identifier in BBOX query string parameter.  
     *     Default is false.  If true and the layer has a projection object set,
     *     any BBOX filter will be serialized with a fifth item identifying the
     *     projection.  E.g. bbox=-1000,-1000,1000,1000,EPSG:900913
     */
    srsInBBOX: false,

    /**
     * Constructor: OpenLayers.Protocol.HTTP
     * A class for giving layers generic HTTP protocol.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options include:
     * url - {String}
     * headers - {Object} 
     * params - {Object} URL parameters for GET requests
     * format - {<OpenLayers.Format>}
     * callback - {Function}
     * scope - {Object}
     */
    initialize: function(options) {
        options = options || {};
        this.params = {};
        this.headers = {};
        OpenLayers.Protocol.prototype.initialize.apply(this, arguments);

        if (!this.filterToParams && OpenLayers.Format.QueryStringFilter) {
            var format = new OpenLayers.Format.QueryStringFilter({
                wildcarded: this.wildcarded,
                srsInBBOX: this.srsInBBOX
            });
            this.filterToParams = function(filter, params) {
                return format.write(filter, params);
            };
        }
    },
    
    /**
     * APIMethod: destroy
     * Clean up the protocol.
     */
    destroy: function() {
        this.params = null;
        this.headers = null;
        OpenLayers.Protocol.prototype.destroy.apply(this);
    },

    /**
     * APIMethod: filterToParams
     * Optional method to translate an <OpenLayers.Filter> object into an object
     *     that can be serialized as request query string provided.  If a custom
     *     method is not provided, the filter will be serialized using the 
     *     <OpenLayers.Format.QueryStringFilter> class.
     *
     * Parameters:
     * filter - {<OpenLayers.Filter>} filter to convert.
     * params - {Object} The parameters object.
     *
     * Returns:
     * {Object} The resulting parameters object.
     */
    
    /**
     * APIMethod: read
     * Construct a request for reading new features.
     *
     * Parameters:
     * options - {Object} Optional object for configuring the request.
     *     This object is modified and should not be reused.
     *
     * Valid options:
     * url - {String} Url for the request.
     * params - {Object} Parameters to get serialized as a query string.
     * headers - {Object} Headers to be set on the request.
     * filter - {<OpenLayers.Filter>} Filter to get serialized as a
     *     query string.
     * readWithPOST - {Boolean} If the request should be done with POST.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} A response object, whose "priv" property
     *     references the HTTP request, this object is also passed to the
     *     callback function when the request completes, its "features" property
     *     is then populated with the features received from the server.
     */
    read: function(options) {
        OpenLayers.Protocol.prototype.read.apply(this, arguments);
        options = options || {};
        options.params = OpenLayers.Util.applyDefaults(
            options.params, this.options.params);
        options = OpenLayers.Util.applyDefaults(options, this.options);
        if (options.filter && this.filterToParams) {
            options.params = this.filterToParams(
                options.filter, options.params
            );
        }
        var readWithPOST = (options.readWithPOST !== undefined) ?
                           options.readWithPOST : this.readWithPOST;
        var resp = new OpenLayers.Protocol.Response({requestType: "read"});
        if(readWithPOST) {
            var headers = options.headers || {};
            headers["Content-Type"] = "application/x-www-form-urlencoded";
            resp.priv = OpenLayers.Request.POST({
                url: options.url,
                callback: this.createCallback(this.handleRead, resp, options),
                data: OpenLayers.Util.getParameterString(options.params),
                headers: headers
            });
        } else {
            resp.priv = OpenLayers.Request.GET({
                url: options.url,
                callback: this.createCallback(this.handleRead, resp, options),
                params: options.params,
                headers: options.headers
            });
        }
        return resp;
    },

    /**
     * Method: handleRead
     * Individual callbacks are created for read, create and update, should
     *     a subclass need to override each one separately.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     the user callback.
     * options - {Object} The user options passed to the read call.
     */
    handleRead: function(resp, options) {
        this.handleResponse(resp, options);
    },

    /**
     * APIMethod: create
     * Construct a request for writing newly created features.
     *
     * Parameters:
     * features - {Array({<OpenLayers.Feature.Vector>})} or
     *     {<OpenLayers.Feature.Vector>}
     * options - {Object} Optional object for configuring the request.
     *     This object is modified and should not be reused.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     *     object, whose "priv" property references the HTTP request, this 
     *     object is also passed to the callback function when the request
     *     completes, its "features" property is then populated with the
     *     the features received from the server.
     */
    create: function(features, options) {
        options = OpenLayers.Util.applyDefaults(options, this.options);

        var resp = new OpenLayers.Protocol.Response({
            reqFeatures: features,
            requestType: "create"
        });

        resp.priv = OpenLayers.Request.POST({
            url: options.url,
            callback: this.createCallback(this.handleCreate, resp, options),
            headers: options.headers,
            data: this.format.write(features)
        });

        return resp;
    },

    /**
     * Method: handleCreate
     * Called the the request issued by <create> is complete.  May be overridden
     *     by subclasses.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     any user callback.
     * options - {Object} The user options passed to the create call.
     */
    handleCreate: function(resp, options) {
        this.handleResponse(resp, options);
    },

    /**
     * APIMethod: update
     * Construct a request updating modified feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * options - {Object} Optional object for configuring the request.
     *     This object is modified and should not be reused.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     *     object, whose "priv" property references the HTTP request, this 
     *     object is also passed to the callback function when the request
     *     completes, its "features" property is then populated with the
     *     the feature received from the server.
     */
    update: function(feature, options) {
        options = options || {};
        var url = options.url ||
                  feature.url ||
                  this.options.url + "/" + feature.fid;
        options = OpenLayers.Util.applyDefaults(options, this.options);

        var resp = new OpenLayers.Protocol.Response({
            reqFeatures: feature,
            requestType: "update"
        });

        var method = this.updateWithPOST ? "POST" : "PUT";
        resp.priv = OpenLayers.Request[method]({
            url: url,
            callback: this.createCallback(this.handleUpdate, resp, options),
            headers: options.headers,
            data: this.format.write(feature)
        });

        return resp;
    },

    /**
     * Method: handleUpdate
     * Called the the request issued by <update> is complete.  May be overridden
     *     by subclasses.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     any user callback.
     * options - {Object} The user options passed to the update call.
     */
    handleUpdate: function(resp, options) {
        this.handleResponse(resp, options);
    },

    /**
     * APIMethod: delete
     * Construct a request deleting a removed feature.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     * options - {Object} Optional object for configuring the request.
     *     This object is modified and should not be reused.
     *
     * Returns:
     * {<OpenLayers.Protocol.Response>} An <OpenLayers.Protocol.Response>
     *     object, whose "priv" property references the HTTP request, this 
     *     object is also passed to the callback function when the request
     *     completes.
     */
    "delete": function(feature, options) {
        options = options || {};
        var url = options.url ||
                  feature.url ||
                  this.options.url + "/" + feature.fid;
        options = OpenLayers.Util.applyDefaults(options, this.options);

        var resp = new OpenLayers.Protocol.Response({
            reqFeatures: feature,
            requestType: "delete"
        });

        var method = this.deleteWithPOST ? "POST" : "DELETE";
        var requestOptions = {
            url: url,
            callback: this.createCallback(this.handleDelete, resp, options),
            headers: options.headers
        };
        if (this.deleteWithPOST) {
            requestOptions.data = this.format.write(feature);
        }
        resp.priv = OpenLayers.Request[method](requestOptions);

        return resp;
    },

    /**
     * Method: handleDelete
     * Called the the request issued by <delete> is complete.  May be overridden
     *     by subclasses.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     any user callback.
     * options - {Object} The user options passed to the delete call.
     */
    handleDelete: function(resp, options) {
        this.handleResponse(resp, options);
    },

    /**
     * Method: handleResponse
     * Called by CRUD specific handlers.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>} The response object to pass to
     *     any user callback.
     * options - {Object} The user options passed to the create, read, update,
     *     or delete call.
     */
    handleResponse: function(resp, options) {
        var request = resp.priv;
        if(options.callback) {
            if(request.status >= 200 && request.status < 300) {
                // success
                if(resp.requestType != "delete") {
                    resp.features = this.parseFeatures(request);
                }
                resp.code = OpenLayers.Protocol.Response.SUCCESS;
            } else {
                // failure
                resp.code = OpenLayers.Protocol.Response.FAILURE;
            }
            options.callback.call(options.scope, resp);
        }
    },

    /**
     * Method: parseFeatures
     * Read HTTP response body and return features.
     *
     * Parameters:
     * request - {XMLHttpRequest} The request object
     *
     * Returns:
     * {Array({<OpenLayers.Feature.Vector>})} or
     *     {<OpenLayers.Feature.Vector>} Array of features or a single feature.
     */
    parseFeatures: function(request) {
        var doc = request.responseXML;
        if (!doc || !doc.documentElement) {
            doc = request.responseText;
        }
        if (!doc || doc.length <= 0) {
            return null;
        }
        return this.format.read(doc);
    },

    /**
     * APIMethod: commit
     * Iterate over each feature and take action based on the feature state.
     *     Possible actions are create, update and delete.
     *
     * Parameters:
     * features - {Array({<OpenLayers.Feature.Vector>})}
     * options - {Object} Optional object for setting up intermediate commit
     *     callbacks.
     *
     * Valid options:
     * create - {Object} Optional object to be passed to the <create> method.
     * update - {Object} Optional object to be passed to the <update> method.
     * delete - {Object} Optional object to be passed to the <delete> method.
     * callback - {Function} Optional function to be called when the commit
     *     is complete.
     * scope - {Object} Optional object to be set as the scope of the callback.
     *
     * Returns:
     * {Array(<OpenLayers.Protocol.Response>)} An array of response objects,
     *     one per request made to the server, each object's "priv" property
     *     references the corresponding HTTP request.
     */
    commit: function(features, options) {
        options = OpenLayers.Util.applyDefaults(options, this.options);
        var resp = [], nResponses = 0;
        
        // Divide up features before issuing any requests.  This properly
        // counts requests in the event that any responses come in before
        // all requests have been issued.
        var types = {};
        types[OpenLayers.State.INSERT] = [];
        types[OpenLayers.State.UPDATE] = [];
        types[OpenLayers.State.DELETE] = [];
        var feature, list, requestFeatures = [];
        for(var i=0, len=features.length; i<len; ++i) {
            feature = features[i];
            list = types[feature.state];
            if(list) {
                list.push(feature);
                requestFeatures.push(feature); 
            }
        }
        // tally up number of requests
        var nRequests = (types[OpenLayers.State.INSERT].length > 0 ? 1 : 0) +
            types[OpenLayers.State.UPDATE].length +
            types[OpenLayers.State.DELETE].length;
        
        // This response will be sent to the final callback after all the others
        // have been fired.
        var success = true;
        var finalResponse = new OpenLayers.Protocol.Response({
            reqFeatures: requestFeatures        
        });
        
        function insertCallback(response) {
            var len = response.features ? response.features.length : 0;
            var fids = new Array(len);
            for(var i=0; i<len; ++i) {
                fids[i] = response.features[i].fid;
            }   
            finalResponse.insertIds = fids;
            callback.apply(this, [response]);
        }
 
        function callback(response) {
            this.callUserCallback(response, options);
            success = success && response.success();
            nResponses++;
            if (nResponses >= nRequests) {
                if (options.callback) {
                    finalResponse.code = success ? 
                        OpenLayers.Protocol.Response.SUCCESS :
                        OpenLayers.Protocol.Response.FAILURE;
                    options.callback.apply(options.scope, [finalResponse]);
                }    
            }
        }

        // start issuing requests
        var queue = types[OpenLayers.State.INSERT];
        if(queue.length > 0) {
            resp.push(this.create(
                queue, OpenLayers.Util.applyDefaults(
                    {callback: insertCallback, scope: this}, options.create
                )
            ));
        }
        queue = types[OpenLayers.State.UPDATE];
        for(var i=queue.length-1; i>=0; --i) {
            resp.push(this.update(
                queue[i], OpenLayers.Util.applyDefaults(
                    {callback: callback, scope: this}, options.update
                ))
            );
        }
        queue = types[OpenLayers.State.DELETE];
        for(var i=queue.length-1; i>=0; --i) {
            resp.push(this["delete"](
                queue[i], OpenLayers.Util.applyDefaults(
                    {callback: callback, scope: this}, options["delete"]
                ))
            );
        }
        return resp;
    },

    /**
     * APIMethod: abort
     * Abort an ongoing request, the response object passed to
     * this method must come from this HTTP protocol (as a result
     * of a create, read, update, delete or commit operation).
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>}
     */
    abort: function(response) {
        if (response) {
            response.priv.abort();
        }
    },

    /**
     * Method: callUserCallback
     * This method is used from within the commit method each time an
     *     an HTTP response is received from the server, it is responsible
     *     for calling the user-supplied callbacks.
     *
     * Parameters:
     * resp - {<OpenLayers.Protocol.Response>}
     * options - {Object} The map of options passed to the commit call.
     */
    callUserCallback: function(resp, options) {
        var opt = options[resp.requestType];
        if(opt && opt.callback) {
            opt.callback.call(opt.scope, resp);
        }
    },

    CLASS_NAME: "OpenLayers.Protocol.HTTP" 
});
/* ======================================================================
    OpenLayers/Strategy/Cluster.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 */

/**
 * Class: OpenLayers.Strategy.Cluster
 * Strategy for vector feature clustering.
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.Cluster = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * APIProperty: distance
     * {Integer} Pixel distance between features that should be considered a
     *     single cluster.  Default is 20 pixels.
     */
    distance: 20,
    
    /**
     * APIProperty: threshold
     * {Integer} Optional threshold below which original features will be
     *     added to the layer instead of clusters.  For example, a threshold
     *     of 3 would mean that any time there are 2 or fewer features in
     *     a cluster, those features will be added directly to the layer instead
     *     of a cluster representing those features.  Default is null (which is
     *     equivalent to 1 - meaning that clusters may contain just one feature).
     */
    threshold: null,
    
    /**
     * Property: features
     * {Array(<OpenLayers.Feature.Vector>)} Cached features.
     */
    features: null,
    
    /**
     * Property: clusters
     * {Array(<OpenLayers.Feature.Vector>)} Calculated clusters.
     */
    clusters: null,
    
    /**
     * Property: clustering
     * {Boolean} The strategy is currently clustering features.
     */
    clustering: false,
    
    /**
     * Property: resolution
     * {Float} The resolution (map units per pixel) of the current cluster set.
     */
    resolution: null,

    /**
     * Constructor: OpenLayers.Strategy.Cluster
     * Create a new clustering strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    
    /**
     * APIMethod: activate
     * Activate the strategy.  Register any listeners, do appropriate setup.
     * 
     * Returns:
     * {Boolean} The strategy was successfully activated.
     */
    activate: function() {
        var activated = OpenLayers.Strategy.prototype.activate.call(this);
        if(activated) {
            this.layer.events.on({
                "beforefeaturesadded": this.cacheFeatures,
                "moveend": this.cluster,
                scope: this
            });
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the strategy.  Unregister any listeners, do appropriate
     *     tear-down.
     * 
     * Returns:
     * {Boolean} The strategy was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
        if(deactivated) {
            this.clearCache();
            this.layer.events.un({
                "beforefeaturesadded": this.cacheFeatures,
                "moveend": this.cluster,
                scope: this
            });
        }
        return deactivated;
    },
    
    /**
     * Method: cacheFeatures
     * Cache features before they are added to the layer.
     *
     * Parameters:
     * event - {Object} The event that this was listening for.  This will come
     *     with a batch of features to be clustered.
     *     
     * Returns:
     * {Boolean} False to stop features from being added to the layer.
     */
    cacheFeatures: function(event) {
        var propagate = true;
        if(!this.clustering) {
            this.clearCache();
            this.features = event.features;
            this.cluster();
            propagate = false;
        }
        return propagate;
    },
    
    /**
     * Method: clearCache
     * Clear out the cached features.
     */
    clearCache: function() {
        this.features = null;
    },
    
    /**
     * Method: cluster
     * Cluster features based on some threshold distance.
     *
     * Parameters:
     * event - {Object} The event received when cluster is called as a
     *     result of a moveend event.
     */
    cluster: function(event) {
        if((!event || event.zoomChanged) && this.features) {
            var resolution = this.layer.map.getResolution();
            if(resolution != this.resolution || !this.clustersExist()) {
                this.resolution = resolution;
                var clusters = [];
                var feature, clustered, cluster;
                for(var i=0; i<this.features.length; ++i) {
                    feature = this.features[i];
                    if(feature.geometry) {
                        clustered = false;
                        for(var j=clusters.length-1; j>=0; --j) {
                            cluster = clusters[j];
                            if(this.shouldCluster(cluster, feature)) {
                                this.addToCluster(cluster, feature);
                                clustered = true;
                                break;
                            }
                        }
                        if(!clustered) {
                            clusters.push(this.createCluster(this.features[i]));
                        }
                    }
                }
                this.layer.removeAllFeatures();
                if(clusters.length > 0) {
                    if(this.threshold > 1) {
                        var clone = clusters.slice();
                        clusters = [];
                        var candidate;
                        for(var i=0, len=clone.length; i<len; ++i) {
                            candidate = clone[i];
                            if(candidate.attributes.count < this.threshold) {
                                Array.prototype.push.apply(clusters, candidate.cluster);
                            } else {
                                clusters.push(candidate);
                            }
                        }
                    }
                    this.clustering = true;
                    // A legitimate feature addition could occur during this
                    // addFeatures call.  For clustering to behave well, features
                    // should be removed from a layer before requesting a new batch.
                    this.layer.addFeatures(clusters);
                    this.clustering = false;
                }
                this.clusters = clusters;
            }
        }
    },
    
    /**
     * Method: clustersExist
     * Determine whether calculated clusters are already on the layer.
     *
     * Returns:
     * {Boolean} The calculated clusters are already on the layer.
     */
    clustersExist: function() {
        var exist = false;
        if(this.clusters && this.clusters.length > 0 &&
           this.clusters.length == this.layer.features.length) {
            exist = true;
            for(var i=0; i<this.clusters.length; ++i) {
                if(this.clusters[i] != this.layer.features[i]) {
                    exist = false;
                    break;
                }
            }
        }
        return exist;
    },
    
    /**
     * Method: shouldCluster
     * Determine whether to include a feature in a given cluster.
     *
     * Parameters:
     * cluster - {<OpenLayers.Feature.Vector>} A cluster.
     * feature - {<OpenLayers.Feature.Vector>} A feature.
     *
     * Returns:
     * {Boolean} The feature should be included in the cluster.
     */
    shouldCluster: function(cluster, feature) {
        var cc = cluster.geometry.getBounds().getCenterLonLat();
        var fc = feature.geometry.getBounds().getCenterLonLat();
        var distance = (
            Math.sqrt(
                Math.pow((cc.lon - fc.lon), 2) + Math.pow((cc.lat - fc.lat), 2)
            ) / this.resolution
        );
        return (distance <= this.distance);
    },
    
    /**
     * Method: addToCluster
     * Add a feature to a cluster.
     *
     * Parameters:
     * cluster - {<OpenLayers.Feature.Vector>} A cluster.
     * feature - {<OpenLayers.Feature.Vector>} A feature.
     */
    addToCluster: function(cluster, feature) {
        cluster.cluster.push(feature);
        cluster.attributes.count += 1;
    },
    
    /**
     * Method: createCluster
     * Given a feature, create a cluster.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A cluster.
     */
    createCluster: function(feature) {
        var center = feature.geometry.getBounds().getCenterLonLat();
        var cluster = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point(center.lon, center.lat),
            {count: 1}
        );
        cluster.cluster = [feature];
        return cluster;
    },

    CLASS_NAME: "OpenLayers.Strategy.Cluster" 
});
/* ======================================================================
    OpenLayers/Strategy/Filter.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 * @requires OpenLayers/Filter.js
 */

/**
 * Class: OpenLayers.Strategy.Filter
 * Strategy for limiting features that get added to a layer by 
 *     evaluating a filter.  The strategy maintains a cache of
 *     all features until removeFeatures is called on the layer.
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.Filter = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * APIProperty: filter
     * {<OpenLayers.Filter>}  Filter for limiting features sent to the layer.
     *     Use the <setFilter> method to update this filter after construction.
     */
    filter: null,
    
    /**
     * Property: cache
     * {Array(<OpenLayers.Feature.Vector>)} List of currently cached
     *     features.
     */
    cache: null,
    
    /**
     * Property: caching
     * {Boolean} The filter is currently caching features.
     */
    caching: false,
    
    /**
     * Constructor: OpenLayers.Strategy.Filter
     * Create a new filter strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */

    /**
     * APIMethod: activate
     * Activate the strategy.  Register any listeners, do appropriate setup.
     *     By default, this strategy automatically activates itself when a layer
     *     is added to a map.
     *
     * Returns:
     * {Boolean} True if the strategy was successfully activated or false if
     *      the strategy was already active.
     */
    activate: function() {
        var activated = OpenLayers.Strategy.prototype.activate.apply(this, arguments);
        if (activated) {
            this.cache = [];
            this.layer.events.on({
                "beforefeaturesadded": this.handleAdd,
                "beforefeaturesremoved": this.handleRemove,
                scope: this
            });
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the strategy.  Clear the feature cache.
     *
     * Returns:
     * {Boolean} True if the strategy was successfully deactivated or false if
     *      the strategy was already inactive.
     */
    deactivate: function() {
        this.cache = null;
        if (this.layer && this.layer.events) {
            this.layer.events.un({
                "beforefeaturesadded": this.handleAdd,
                "beforefeaturesremoved": this.handleRemove,
                scope: this
            });            
        }
        return OpenLayers.Strategy.prototype.deactivate.apply(this, arguments);
    },
    
    /**
     * Method: handleAdd
     */
    handleAdd: function(event) {
        if (!this.caching && this.filter) {
            var features = event.features;
            event.features = [];
            var feature;
            for (var i=0, ii=features.length; i<ii; ++i) {
                feature = features[i];
                if (this.filter.evaluate(feature)) {
                    event.features.push(feature);
                } else {
                    this.cache.push(feature);
                }
            }
        }
    },
    
    /**
     * Method: handleRemove
     */
    handleRemove: function(event) {
        if (!this.caching) {
            this.cache = [];
        }
    },

    /** 
     * APIMethod: setFilter
     * Update the filter for this strategy.  This will re-evaluate
     *     any features on the layer and in the cache.  Only features
     *     for which filter.evalute(feature) returns true will be
     *     added to the layer.  Others will be cached by the strategy.
     *
     * Parameters:
     * filter - {<OpenLayers.Filter>} A filter for evaluating features.
     */
    setFilter: function(filter) {
        this.filter = filter;
        var previousCache = this.cache;
        this.cache = [];
        // look through layer for features to remove from layer
        this.handleAdd({features: this.layer.features});
        // cache now contains features to remove from layer
        if (this.cache.length > 0) {
            this.caching = true;
            this.layer.removeFeatures(this.cache.slice());
            this.caching = false;
        }
        // now look through previous cache for features to add to layer
        if (previousCache.length > 0) {
            var event = {features: previousCache};
            this.handleAdd(event);
            if (event.features.length > 0) {
                // event has features to add to layer
                this.caching = true;
                this.layer.addFeatures(event.features);
                this.caching = false;
            }
        }
    },

    CLASS_NAME: "OpenLayers.Strategy.Filter"

});
/* ======================================================================
    OpenLayers/Protocol/SOS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol.js
 */

/**
 * Function: OpenLayers.Protocol.SOS
 * Used to create a versioned SOS protocol.  Default version is 1.0.0.
 *
 * Returns:
 * {<OpenLayers.Protocol>} An SOS protocol for the given version.
 */
OpenLayers.Protocol.SOS = function(options) {
    options = OpenLayers.Util.applyDefaults(
        options, OpenLayers.Protocol.SOS.DEFAULTS
    );
    var cls = OpenLayers.Protocol.SOS["v"+options.version.replace(/\./g, "_")];
    if(!cls) {
        throw "Unsupported SOS version: " + options.version;
    }
    return new cls(options);
};

/**
 * Constant: OpenLayers.Protocol.SOS.DEFAULTS
 */
OpenLayers.Protocol.SOS.DEFAULTS = {
    "version": "1.0.0"
};
/* ======================================================================
    OpenLayers/Format/WFSDescribeFeatureType.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 */
 
/**
 * Class: OpenLayers.Format.WFSDescribeFeatureType
 * Read WFS DescribeFeatureType response
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WFSDescribeFeatureType = OpenLayers.Class(
    OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        xsd: "http://www.w3.org/2001/XMLSchema"
    },
    
    /**
     * Constructor: OpenLayers.Format.WFSDescribeFeatureType
     * Create a new parser for WFS DescribeFeatureType responses.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "xsd": {
            "schema": function(node, obj) {
                var complexTypes = [];
                var customTypes = {};
                var schema = {
                    complexTypes: complexTypes,
                    customTypes: customTypes
                };
                
                this.readChildNodes(node, schema);

                var attributes = node.attributes;
                var attr, name;
                for(var i=0, len=attributes.length; i<len; ++i) {
                    attr = attributes[i];
                    name = attr.name;
                    if(name.indexOf("xmlns") == 0) {
                        this.setNamespace(name.split(":")[1] || "", attr.value);
                    } else {
                        obj[name] = attr.value;
                    }
                }
                obj.featureTypes = complexTypes;                
                obj.targetPrefix = this.namespaceAlias[obj.targetNamespace];
                
                // map complexTypes to names of customTypes
                var complexType, customType;
                for(var i=0, len=complexTypes.length; i<len; ++i) {
                    complexType = complexTypes[i];
                    customType = customTypes[complexType.typeName];
                    if(customTypes[complexType.typeName]) {
                        complexType.typeName = customType.name;
                    }
                }
            },
            "complexType": function(node, obj) {
                var complexType = {
                    // this is a temporary typeName, it will be overwritten by
                    // the schema reader with the metadata found in the
                    // customTypes hash
                    "typeName": node.getAttribute("name")
                };
                this.readChildNodes(node, complexType);
                obj.complexTypes.push(complexType);
            },
            "complexContent": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "extension": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "sequence": function(node, obj) {
                var sequence = {
                    elements: []
                };
                this.readChildNodes(node, sequence);
                obj.properties = sequence.elements;
            },
            "element": function(node, obj) {
                if(obj.elements) {
                    var element = {};
                    var attributes = node.attributes;
                    var attr;
                    for(var i=0, len=attributes.length; i<len; ++i) {
                        attr = attributes[i];
                        element[attr.name] = attr.value;
                    }
                    
                    var type = element.type;
                    if(!type) {
                        type = {};
                        this.readChildNodes(node, type);
                        element.restriction = type;
                        element.type = type.base;
                    }
                    var fullType = type.base || type;
                    element.localType = fullType.split(":").pop();
                    obj.elements.push(element);
                }
                
                if(obj.complexTypes) {
                    var type = node.getAttribute("type");
                    var localType = type.split(":").pop();
                    obj.customTypes[localType] = {
                        "name": node.getAttribute("name"),
                        "type": type
                    };
                }
            },
            "simpleType": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "restriction": function(node, obj) {
                obj.base = node.getAttribute("base");
                this.readRestriction(node, obj);
            }
        }
    },
    
    /**
     * Method: readRestriction
     * Reads restriction defined in the child nodes of a restriction element
     * 
     * Parameters:
     * node - {DOMElement} the node to parse
     * obj - {Object} the object that receives the read result
     */
    readRestriction: function(node, obj) {
        var children = node.childNodes;
        var child, nodeName, value;
        for(var i=0, len=children.length; i<len; ++i) {
            child = children[i];
            if(child.nodeType == 1) {
                nodeName = child.nodeName.split(":").pop();
                value = child.getAttribute("value");
                if(!obj[nodeName]) {
                    obj[nodeName] = value;
                } else {
                    if(typeof obj[nodeName] == "string") {
                        obj[nodeName] = [obj[nodeName]];
                    }
                    obj[nodeName].push(value);
                }
            }
        }
    },
    
    /**
     * Method: read
     *
     * Parameters:
     * data - {DOMElement|String} A WFS DescribeFeatureType document.
     *
     * Returns:
     * {Object} An object representing the WFS DescribeFeatureType response.
     */
    read: function(data) {
        if(typeof data == "string") { 
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var schema = {};
        this.readNode(data, schema);
        
        return schema;
    },
    
    CLASS_NAME: "OpenLayers.Format.WFSDescribeFeatureType" 

});
/* ======================================================================
    OpenLayers/Format/GeoRSS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Feature/Vector.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/LineString.js
 * @requires OpenLayers/Geometry/Polygon.js
 */

/**
 * Class: OpenLayers.Format.GeoRSS
 * Read/write GeoRSS parser. Create a new instance with the 
 *     <OpenLayers.Format.GeoRSS> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.GeoRSS = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * APIProperty: rssns
     * {String} RSS namespace to use. Defaults to
     *   "http://backend.userland.com/rss2"
     */
    rssns: "http://backend.userland.com/rss2",
    
    /**
     * APIProperty: featurens
     * {String} Feature Attributes namespace.  Defaults to
     *    "http://mapserver.gis.umn.edu/mapserver"
     */
    featureNS: "http://mapserver.gis.umn.edu/mapserver",
    
    /**
     * APIProperty: georssns
     * {String} GeoRSS namespace to use.  Defaults to
     *     "http://www.georss.org/georss"
     */
    georssns: "http://www.georss.org/georss",

    /**
     * APIProperty: geons
     * {String} W3C Geo namespace to use.  Defaults to
     *     "http://www.w3.org/2003/01/geo/wgs84_pos#"
     */
    geons: "http://www.w3.org/2003/01/geo/wgs84_pos#",
    
    /**
     * APIProperty: featureTitle
     * {String} Default title for features.  Defaults to "Untitled"
     */
    featureTitle: "Untitled",
    
    /**
     * APIProperty: featureDescription
     * {String} Default description for features.  Defaults to "No Description"
     */
    featureDescription: "No Description",
    
    /**
     * Property: gmlParse
     * {Object} GML Format object for parsing features
     * Non-API and only created if necessary
     */
    gmlParser: null,

    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate: true:(x,y) or false:(y,x)
     * For GeoRSS the default is (y,x), therefore: false
     */ 
    xy: false,
    
    /**
     * Constructor: OpenLayers.Format.GeoRSS
     * Create a new parser for GeoRSS.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * Method: createGeometryFromItem
     * Return a geometry from a GeoRSS Item.
     *
     * Parameters:
     * item - {DOMElement} A GeoRSS item node.
     *
     * Returns:
     * {<OpenLayers.Geometry>} A geometry representing the node.
     */
    createGeometryFromItem: function(item) {
        var point = this.getElementsByTagNameNS(item, this.georssns, "point");
        var lat = this.getElementsByTagNameNS(item, this.geons, 'lat');
        var lon = this.getElementsByTagNameNS(item, this.geons, 'long');
        
        var line = this.getElementsByTagNameNS(item,
                                                this.georssns,
                                                "line");
        var polygon = this.getElementsByTagNameNS(item,
                                                this.georssns,
                                                "polygon");
        var where = this.getElementsByTagNameNS(item, 
                                                this.georssns, 
                                                "where");
        var box = this.getElementsByTagNameNS(item, 
                                              this.georssns, 
                                              "box");

        if (point.length > 0 || (lat.length > 0 && lon.length > 0)) {
            var location;
            if (point.length > 0) {
                location = OpenLayers.String.trim(
                                point[0].firstChild.nodeValue).split(/\s+/);
                if (location.length !=2) {
                    location = OpenLayers.String.trim(
                                point[0].firstChild.nodeValue).split(/\s*,\s*/);
                }
            } else {
                location = [parseFloat(lat[0].firstChild.nodeValue),
                                parseFloat(lon[0].firstChild.nodeValue)];
            }    

            var geometry = new OpenLayers.Geometry.Point(location[1], location[0]);
              
        } else if (line.length > 0) {
            var coords = OpenLayers.String.trim(this.getChildValue(line[0])).split(/\s+/);
            var components = []; 
            var point;
            for (var i=0, len=coords.length; i<len; i+=2) {
                point = new OpenLayers.Geometry.Point(coords[i+1], coords[i]);
                components.push(point);
            }
            geometry = new OpenLayers.Geometry.LineString(components);
        } else if (polygon.length > 0) { 
            var coords = OpenLayers.String.trim(this.getChildValue(polygon[0])).split(/\s+/);
            var components = []; 
            var point;
            for (var i=0, len=coords.length; i<len; i+=2) {
                point = new OpenLayers.Geometry.Point(coords[i+1], coords[i]);
                components.push(point);
            }
            geometry = new OpenLayers.Geometry.Polygon([new OpenLayers.Geometry.LinearRing(components)]);
        } else if (where.length > 0) { 
            if (!this.gmlParser) {
              this.gmlParser = new OpenLayers.Format.GML({'xy': this.xy});
            }
            var feature = this.gmlParser.parseFeature(where[0]);
            geometry = feature.geometry;
        } else if (box.length  > 0) {
            var coords = OpenLayers.String.trim(box[0].firstChild.nodeValue).split(/\s+/);
            var components = [];
            var point;
            if (coords.length > 3) {
                point = new OpenLayers.Geometry.Point(coords[1], coords[0]);
                components.push(point);
                point = new OpenLayers.Geometry.Point(coords[1], coords[2]);
                components.push(point);
                point = new OpenLayers.Geometry.Point(coords[3], coords[2]);
                components.push(point);
                point = new OpenLayers.Geometry.Point(coords[3], coords[0]);
                components.push(point);
                point = new OpenLayers.Geometry.Point(coords[1], coords[0]);
                components.push(point);
            }
            geometry = new OpenLayers.Geometry.Polygon([new OpenLayers.Geometry.LinearRing(components)]);
        }
        
        if (geometry && this.internalProjection && this.externalProjection) {
            geometry.transform(this.externalProjection, 
                               this.internalProjection);
        }

        return geometry;
    },        

    /**
     * Method: createFeatureFromItem
     * Return a feature from a GeoRSS Item.
     *
     * Parameters:
     * item - {DOMElement} A GeoRSS item node.
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>} A feature representing the item.
     */
    createFeatureFromItem: function(item) {
        var geometry = this.createGeometryFromItem(item);
     
        /* Provide defaults for title and description */
        var title = this._getChildValue(item, "*", "title", this.featureTitle);
       
        /* First try RSS descriptions, then Atom summaries */
        var description = this._getChildValue(
            item, "*", "description",
            this._getChildValue(item, "*", "content",
                this._getChildValue(item, "*", "summary", this.featureDescription)));

        /* If no link URL is found in the first child node, try the
           href attribute */
        var link = this._getChildValue(item, "*", "link");
        if(!link) {
            try {
                link = this.getElementsByTagNameNS(item, "*", "link")[0].getAttribute("href");
            } catch(e) {
                link = null;
            }
        }

        var id = this._getChildValue(item, "*", "id", null);
        
        var data = {
            "title": title,
            "description": description,
            "link": link
        };
        var feature = new OpenLayers.Feature.Vector(geometry, data);
        feature.fid = id;
        return feature;
    },        
    
    /**
     * Method: _getChildValue
     *
     * Parameters:
     * node - {DOMElement}
     * nsuri - {String} Child node namespace uri ("*" for any).
     * name - {String} Child node name.
     * def - {String} Optional string default to return if no child found.
     *
     * Returns:
     * {String} The value of the first child with the given tag name.  Returns
     *     default value or empty string if none found.
     */
    _getChildValue: function(node, nsuri, name, def) {
        var value;
        var eles = this.getElementsByTagNameNS(node, nsuri, name);
        if(eles && eles[0] && eles[0].firstChild
            && eles[0].firstChild.nodeValue) {
            value = this.getChildValue(eles[0]);
        } else {
            value = (def == undefined) ? "" : def;
        }
        return value;
    },
    
    /**
     * APIMethod: read
     * Return a list of features from a GeoRSS doc
     *
     * Parameters:
     * doc - {Element} 
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)}
     */
    read: function(doc) {
        if (typeof doc == "string") { 
            doc = OpenLayers.Format.XML.prototype.read.apply(this, [doc]);
        }

        /* Try RSS items first, then Atom entries */
        var itemlist = null;
        itemlist = this.getElementsByTagNameNS(doc, '*', 'item');
        if (itemlist.length == 0) {
            itemlist = this.getElementsByTagNameNS(doc, '*', 'entry');
        }
        
        var numItems = itemlist.length;
        var features = new Array(numItems);
        for(var i=0; i<numItems; i++) {
            features[i] = this.createFeatureFromItem(itemlist[i]);
        }
        return features;
    },
    

    /**
     * APIMethod: write
     * Accept Feature Collection, and return a string. 
     * 
     * Parameters: 
     * features - {Array(<OpenLayers.Feature.Vector>)} List of features to serialize into a string.
     */
    write: function(features) {
        var georss;
        if(OpenLayers.Util.isArray(features)) {
            georss = this.createElementNS(this.rssns, "rss");
            for(var i=0, len=features.length; i<len; i++) {
                georss.appendChild(this.createFeatureXML(features[i]));
            }
        } else {
            georss = this.createFeatureXML(features);
        }
        return OpenLayers.Format.XML.prototype.write.apply(this, [georss]);
    },

    /**
     * Method: createFeatureXML
     * Accept an <OpenLayers.Feature.Vector>, and build a geometry for it.
     * 
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     *
     * Returns:
     * {DOMElement}
     */
    createFeatureXML: function(feature) {
        var geometryNode = this.buildGeometryNode(feature.geometry);
        var featureNode = this.createElementNS(this.rssns, "item");
        var titleNode = this.createElementNS(this.rssns, "title");
        titleNode.appendChild(this.createTextNode(feature.attributes.title ? feature.attributes.title : ""));
        var descNode = this.createElementNS(this.rssns, "description");
        descNode.appendChild(this.createTextNode(feature.attributes.description ? feature.attributes.description : ""));
        featureNode.appendChild(titleNode);
        featureNode.appendChild(descNode);
        if (feature.attributes.link) {
            var linkNode = this.createElementNS(this.rssns, "link");
            linkNode.appendChild(this.createTextNode(feature.attributes.link));
            featureNode.appendChild(linkNode);
        }    
        for(var attr in feature.attributes) {
            if (attr == "link" || attr == "title" || attr == "description") { continue; } 
            var attrText = this.createTextNode(feature.attributes[attr]); 
            var nodename = attr;
            if (attr.search(":") != -1) {
                nodename = attr.split(":")[1];
            }    
            var attrContainer = this.createElementNS(this.featureNS, "feature:"+nodename);
            attrContainer.appendChild(attrText);
            featureNode.appendChild(attrContainer);
        }    
        featureNode.appendChild(geometryNode);
        return featureNode;
    },    
    
    /** 
     * Method: buildGeometryNode
     * builds a GeoRSS node with a given geometry
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     *
     * Returns:
     * {DOMElement} A gml node.
     */
    buildGeometryNode: function(geometry) {
        if (this.internalProjection && this.externalProjection) {
            geometry = geometry.clone();
            geometry.transform(this.internalProjection, 
                               this.externalProjection);
        }
        var node;
        // match Polygon
        if (geometry.CLASS_NAME == "OpenLayers.Geometry.Polygon") {
            node = this.createElementNS(this.georssns, 'georss:polygon');
            
            node.appendChild(this.buildCoordinatesNode(geometry.components[0]));
        }
        // match LineString
        else if (geometry.CLASS_NAME == "OpenLayers.Geometry.LineString") {
            node = this.createElementNS(this.georssns, 'georss:line');
            
            node.appendChild(this.buildCoordinatesNode(geometry));
        }
        // match Point
        else if (geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
            node = this.createElementNS(this.georssns, 'georss:point');
            node.appendChild(this.buildCoordinatesNode(geometry));
        } else {
            throw "Couldn't parse " + geometry.CLASS_NAME;
        }  
        return node;         
    },
    
    /** 
     * Method: buildCoordinatesNode
     * 
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     */
    buildCoordinatesNode: function(geometry) {
        var points = null;
        
        if (geometry.components) {
            points = geometry.components;
        }

        var path;
        if (points) {
            var numPoints = points.length;
            var parts = new Array(numPoints);
            for (var i = 0; i < numPoints; i++) {
                parts[i] = points[i].y + " " + points[i].x;
            }
            path = parts.join(" ");
        } else {
            path = geometry.y + " " + geometry.x;
        }
        return this.createTextNode(path);
    },

    CLASS_NAME: "OpenLayers.Format.GeoRSS" 
});     
/* ======================================================================
    OpenLayers/Format/WPSCapabilities.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */
 
/**
 * Class: OpenLayers.Format.WPSCapabilities
 * Read WPS Capabilities.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.WPSCapabilities = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.0.0".
     */
    defaultVersion: "1.0.0",
    
    /**
     * Constructor: OpenLayers.Format.WPSCapabilities
     * Create a new parser for WPS Capabilities.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return information about
     * the service.
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Info about the WPS
     */
    
    CLASS_NAME: "OpenLayers.Format.WPSCapabilities" 

});
/* ======================================================================
    OpenLayers/Format/WPSCapabilities/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WPSCapabilities.js
 * @requires OpenLayers/Format/OWSCommon/v1_1_0.js
 */

/**
 * Class: OpenLayers.Format.WPSCapabilities.v1_0_0
 * Read WPS Capabilities version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WPSCapabilities.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.XML, {

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows/1.1",
        wps: "http://www.opengis.net/wps/1.0.0",
        xlink: "http://www.w3.org/1999/xlink"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },
    
    /**
     * Constructor: OpenLayers.Format.WPSCapabilities.v1_0_0
     * Create a new parser for WPS capabilities version 1.0.0. 
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
    },

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return info about the WPS.
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Information about the WPS service.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var capabilities = {};
        this.readNode(data, capabilities);
        return capabilities;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wps": {
            "Capabilities": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "ProcessOfferings": function(node, obj) {
                obj.processOfferings = {};
                this.readChildNodes(node, obj.processOfferings);
            },
            "Process": function(node, processOfferings) {
                var processVersion = this.getAttributeNS(node, this.namespaces.wps, "processVersion");
                var process = {processVersion: processVersion};
                this.readChildNodes(node, process);
                processOfferings[process.identifier] = process;
            },
            "Languages": function(node, obj) {
                obj.languages = [];
                this.readChildNodes(node, obj.languages);
            },
            "Default": function(node, languages) {
                var language = {isDefault: true};
                this.readChildNodes(node, language);
                languages.push(language);
            },
            "Supported": function(node, languages) {
                var language = {};
                this.readChildNodes(node, language);     
                languages.push(language);
            }
        },
        "ows": OpenLayers.Format.OWSCommon.v1_1_0.prototype.readers["ows"]
    },    
    
    CLASS_NAME: "OpenLayers.Format.WPSCapabilities.v1_0_0" 

});
/* ======================================================================
    OpenLayers/Control/PinchZoom.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Handler/Pinch.js
 */

/**
 * Class: OpenLayers.Control.PinchZoom
 *
 * Inherits:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.PinchZoom = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * Property: type
     * {OpenLayers.Control.TYPES}
     */
    type: OpenLayers.Control.TYPE_TOOL,

    /**
     * Property: containerCenter
     * {Object} Cached object representing the layer container center (in pixels).
     */
    containerCenter: null,

    /**
     * Property: pinchOrigin
     * {Object} Cached object representing the pinch start (in pixels).
     */
    pinchOrigin: null,    
    
    /**
     * Property: currentCenter
     * {Object} Cached object representing the latest pinch center (in pixels).
     */
    currentCenter: null,    

    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,
    
    /**
     * Constructor: OpenLayers.Control.PinchZoom
     * Create a control for zooming with pinch gestures.  This works on devices
     *     with multi-touch support.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *                    the control
     */
    initialize: function(options) {
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
        this.handler = new OpenLayers.Handler.Pinch(this, {
            start: this.pinchStart,
            move: this.pinchMove,
            done: this.pinchDone
        }, this.handlerOptions);
    },
    
    /**
     * APIMethod: activate
     * Activate this control.  Must be called after the control is added to a 
     * map.
     *
     * Returns:
     * {Boolean} The control was successfully activated.
     */
    activate: function() {
        var activated = OpenLayers.Control.prototype.activate.apply(this,arguments);
        if (activated) {
            this.map.events.on({
                moveend: this.updateContainerCenter,
                scope: this
            });
            this.updateContainerCenter();
        }
        return activated;
    },

    /**
     * APIMethod: deactivate
     * Deactivate this control.
     *
     * Returns:
     * {Boolean} The control was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Control.prototype.deactivate.apply(this,arguments);
        if (this.map && this.map.events) {
            this.map.events.un({
                moveend: this.updateContainerCenter,
                scope: this
            });
        }
        return deactivated;
    },
    
    /**
     * Method: updateContainerCenter
     * Must be called each time the layer container moves.
     */
    updateContainerCenter: function() {
        var container = this.map.layerContainerDiv;
        // the layer container div is a square of 100px/100px
        this.containerCenter = {
            x: parseInt(container.style.left, 10) + 50,
            y: parseInt(container.style.top, 10) + 50
        };
    },

    /**
     * Method: pinchStart
     *
     * Parameters:
     * evt - {Event}
     * pinchData - {Object} pinch data object related to the current touchmove
     *     of the pinch gesture. This give us the current scale of the pinch.
     */
    pinchStart: function(evt, pinchData) {
        this.pinchOrigin = evt.xy;
        this.currentCenter = evt.xy;
    },
    
    /**
     * Method: pinchMove
     *
     * Parameters:
     * evt - {Event}
     * pinchData - {Object} pinch data object related to the current touchmove
     *     of the pinch gesture. This give us the current scale of the pinch.
     */
    pinchMove: function(evt, pinchData) {
        var scale = pinchData.scale;
        var containerCenter = this.containerCenter;
        var pinchOrigin = this.pinchOrigin;
        var current = evt.xy;

        var dx = Math.round((current.x - pinchOrigin.x) + (scale - 1) * (containerCenter.x - pinchOrigin.x));
        var dy = Math.round((current.y - pinchOrigin.y) + (scale - 1) * (containerCenter.y - pinchOrigin.y));

        this.applyTransform(
            "translate(" + dx + "px, " + dy + "px) scale(" + scale + ")"
        );
        this.currentCenter = current;
    },
    
    /**
     * Method: applyTransform
     * Applies the given transform to layers.
     */
    applyTransform: function(transform) {
        var style = this.map.layerContainerDiv.style;
        style['-webkit-transform'] = transform;
        style['-moz-transform'] = transform;
    },
    
    /**
     * Method: pinchDone
     *
     * Parameters:
     * evt - {Event}
     * start - {Object} pinch data object related to the touchstart event that
     *     started the pinch gesture.
     * last - {Object} pinch data object related to the last touchmove event
     *     of the pinch gesture. This give us the final scale of the pinch.
     */
    pinchDone: function(evt, start, last) {
        this.applyTransform("");
        var zoom = this.map.getZoomForResolution(this.map.getResolution() / last.scale, true);
        if (zoom !== this.map.getZoom() || !this.currentCenter.equals(this.pinchOrigin)) {
            var resolution = this.map.getResolutionForZoom(zoom);

            var location = this.map.getLonLatFromPixel(this.pinchOrigin);
            var zoomPixel = this.currentCenter;        
            var size = this.map.getSize();

            location.lon += resolution * ((size.w / 2) - zoomPixel.x);
            location.lat -= resolution * ((size.h / 2) - zoomPixel.y);

            // Force a reflow before calling setCenter. This is to work
            // around an issue occuring in iOS.
            //
            // See https://github.com/openlayers/openlayers/pull/351.
            //
            // Without a reflow setting the layer container div's top left
            // style properties to "0px" - as done in Map.moveTo when zoom
            // is changed - won't actually correctly reposition the layer
            // container div.
            //
            // Also, we need to use a statement that the Google Closure
            // compiler won't optimize away.
            this.map.div.clientWidth = this.map.div.clientWidth;

            this.map.setCenter(location, zoom);
        }
    },

    CLASS_NAME: "OpenLayers.Control.PinchZoom"

});
/* ======================================================================
    OpenLayers/Control/TouchNavigation.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control/DragPan.js
 * @requires OpenLayers/Control/PinchZoom.js
 * @requires OpenLayers/Handler/Click.js
 */

/**
 * Class: OpenLayers.Control.TouchNavigation
 * The navigation control handles map browsing with touch events (dragging,
 *     double-tapping, tap with two fingers, and pinch zoom).  Create a new 
 *     control with the <OpenLayers.Control.TouchNavigation> constructor.
 *
 * If you’re only targeting touch enabled devices with your mapping application,
 *     you can create a map with only a TouchNavigation control. The 
 *     <OpenLayers.Control.Navigation> control is mobile ready by default, but 
 *     you can generate a smaller build of the library by only including this
 *     touch navigation control if you aren't concerned about mouse interaction.
 *
 * Inherits:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.TouchNavigation = OpenLayers.Class(OpenLayers.Control, {

    /**
     * Property: dragPan
     * {<OpenLayers.Control.DragPan>}
     */
    dragPan: null,

    /**
     * APIProperty: dragPanOptions
     * {Object} Options passed to the DragPan control.
     */
    dragPanOptions: null,

    /**
     * Property: pinchZoom
     * {<OpenLayers.Control.PinchZoom>}
     */
    pinchZoom: null,

    /**
     * APIProperty: pinchZoomOptions
     * {Object} Options passed to the PinchZoom control.
     */
    pinchZoomOptions: null,

    /**
     * APIProperty: clickHandlerOptions
     * {Object} Options passed to the Click handler.
     */
    clickHandlerOptions: null,

    /**
     * APIProperty: documentDrag
     * {Boolean} Allow panning of the map by dragging outside map viewport.
     *     Default is false.
     */
    documentDrag: false,

    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /**
     * Constructor: OpenLayers.Control.TouchNavigation
     * Create a new navigation control
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *                    the control
     */
    initialize: function(options) {
        this.handlers = {};
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
    },

    /**
     * Method: destroy
     * The destroy method is used to perform any clean up before the control
     * is dereferenced.  Typically this is where event listeners are removed
     * to prevent memory leaks.
     */
    destroy: function() {
        this.deactivate();
        if(this.dragPan) {
            this.dragPan.destroy();
        }
        this.dragPan = null;
        if (this.pinchZoom) {
            this.pinchZoom.destroy();
            delete this.pinchZoom;
        }
        OpenLayers.Control.prototype.destroy.apply(this,arguments);
    },

    /**
     * Method: activate
     */
    activate: function() {
        if(OpenLayers.Control.prototype.activate.apply(this,arguments)) {
            this.dragPan.activate();
            this.handlers.click.activate();
            this.pinchZoom.activate();
            return true;
        }
        return false;
    },

    /**
     * Method: deactivate
     */
    deactivate: function() {
        if(OpenLayers.Control.prototype.deactivate.apply(this,arguments)) {
            this.dragPan.deactivate();
            this.handlers.click.deactivate();
            this.pinchZoom.deactivate();
            return true;
        }
        return false;
    },
    
    /**
     * Method: draw
     */
    draw: function() {
        var clickCallbacks = {
            click: this.defaultClick,
            dblclick: this.defaultDblClick
        };
        var clickOptions = OpenLayers.Util.extend({
            "double": true,
            stopDouble: true,
            pixelTolerance: 2
        }, this.clickHandlerOptions);
        this.handlers.click = new OpenLayers.Handler.Click(
            this, clickCallbacks, clickOptions
        );
        this.dragPan = new OpenLayers.Control.DragPan(
            OpenLayers.Util.extend({
                map: this.map,
                documentDrag: this.documentDrag
            }, this.dragPanOptions)
        );
        this.dragPan.draw();
        this.pinchZoom = new OpenLayers.Control.PinchZoom(
            OpenLayers.Util.extend({map: this.map}, this.pinchZoomOptions)
        );
    },

    /**
     * Method: defaultClick
     *
     * Parameters:
     * evt - {Event}
     */
    defaultClick: function (evt) {
        if(evt.lastTouches && evt.lastTouches.length == 2) {
            this.map.zoomOut();
        }
    },

    /**
     * Method: defaultDblClick
     *
     * Parameters:
     * evt - {Event}
     */
    defaultDblClick: function (evt) {
        var newCenter = this.map.getLonLatFromViewPortPx(evt.xy);
        this.map.setCenter(newCenter, this.map.zoom + 1);
    },

    CLASS_NAME: "OpenLayers.Control.TouchNavigation"
});
/* ======================================================================
    OpenLayers/Style2.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/BaseTypes/Class.js
 * @requires OpenLayers/Rule.js
 * @requires OpenLayers/Symbolizer/Point.js
 * @requires OpenLayers/Symbolizer/Line.js
 * @requires OpenLayers/Symbolizer/Polygon.js
 * @requires OpenLayers/Symbolizer/Text.js
 * @requires OpenLayers/Symbolizer/Raster.js
 */

/**
 * Class: OpenLayers.Style2
 * This class represents a collection of rules for rendering features.
 */
OpenLayers.Style2 = OpenLayers.Class({

    /**
     * Property: id
     * {String} A unique id for this session.
     */
    id: null,
    
    /**
     * APIProperty: name
     * {String} Style identifier.
     */
    name: null,
    
    /**
     * APIProperty: title
     * {String} Title of this style.
     */
    title: null,
    
    /**
     * APIProperty: description
     * {String} Description of this style.
     */
    description: null,

    /**
     * APIProperty: layerName
     * {<String>} Name of the layer that this style belongs to, usually
     *     according to the NamedLayer attribute of an SLD document.
     */
    layerName: null,
    
    /**
     * APIProperty: isDefault
     * {Boolean}
     */
    isDefault: false,
     
    /** 
     * APIProperty: rules 
     * {Array(<OpenLayers.Rule>)} Collection of rendering rules.
     */
    rules: null,
    
    /** 
     * Constructor: OpenLayers.Style2
     * Creates a style representing a collection of rendering rules.
     *
     * Parameters:
     * config - {Object} An object containing properties to be set on the 
     *     style.  Any documented properties may be set at construction.
     *
     * Returns:
     * {<OpenLayers.Style2>} A new style object.
     */
    initialize: function(config) {
        OpenLayers.Util.extend(this, config);
        this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
    },

    /** 
     * APIMethod: destroy
     * nullify references to prevent circular references and memory leaks
     */
    destroy: function() {
        for (var i=0, len=this.rules.length; i<len; i++) {
            this.rules[i].destroy();
        }
        delete this.rules;
    },

    /**
     * APIMethod: clone
     * Clones this style.
     * 
     * Returns:
     * {<OpenLayers.Style2>} Clone of this style.
     */
    clone: function() {
        var config = OpenLayers.Util.extend({}, this);
        // clone rules
        if (this.rules) {
            config.rules = [];
            for (var i=0, len=this.rules.length; i<len; ++i) {
                config.rules.push(this.rules[i].clone());
            }
        }
        return new OpenLayers.Style2(config);
    },
    
    CLASS_NAME: "OpenLayers.Style2"
});
/* ======================================================================
    OpenLayers/Format/WFS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/GML.js
 * @requires OpenLayers/Console.js
 * @requires OpenLayers/Lang.js
 */

/**
 * Class: OpenLayers.Format.WFS
 * Read/Write WFS. 
 *
 * Inherits from:
 *  - <OpenLayers.Format.GML>
 */
OpenLayers.Format.WFS = OpenLayers.Class(OpenLayers.Format.GML, {
    
    /** 
     * Property: layer
     * {<OpenLayers.Layer>}
     */
    layer: null,
    
    /**
     * APIProperty: wfsns
     * {String}
     */
    wfsns: "http://www.opengis.net/wfs",
    
    /**
     * Property: ogcns
     * {String}
     */
    ogcns: "http://www.opengis.net/ogc",
    
    /**
     * Constructor: OpenLayers.Format.WFS
     * Create a WFS-T formatter. This requires a layer: that layer should
     * have two properties: geometry_column and typename. The parser
     * for this format is subclassed entirely from GML: There is a writer 
     * only, which uses most of the code from the GML layer, and wraps
     * it in transactional elements.
     * 
     * Parameters: 
     * options - {Object} 
     * layer - {<OpenLayers.Layer>} 
     */
    initialize: function(options, layer) {
        OpenLayers.Format.GML.prototype.initialize.apply(this, [options]);
        this.layer = layer;
        if (this.layer.featureNS) {
            this.featureNS = this.layer.featureNS;
        }    
        if (this.layer.options.geometry_column) {
            this.geometryName = this.layer.options.geometry_column;
        }
        if (this.layer.options.typename) {
            this.featureName = this.layer.options.typename;
        }
    },
    
    /**
     * Method: write 
     * Takes a feature list, and generates a WFS-T Transaction 
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} 
     */
    write: function(features) {
    
        var transaction = this.createElementNS(this.wfsns, 'wfs:Transaction');
        transaction.setAttribute("version","1.0.0");
        transaction.setAttribute("service","WFS");
        for (var i=0; i < features.length; i++) {
            switch (features[i].state) {
                case OpenLayers.State.INSERT:
                    transaction.appendChild(this.insert(features[i]));
                    break;
                case OpenLayers.State.UPDATE:
                    transaction.appendChild(this.update(features[i]));
                    break;
                case OpenLayers.State.DELETE:
                    transaction.appendChild(this.remove(features[i]));
                    break;
            }
        }
        
        return OpenLayers.Format.XML.prototype.write.apply(this,[transaction]);
    },
   
    /**
     * Method: createFeatureXML
     *
     * Parameters: 
     * feature - {<OpenLayers.Feature.Vector>}
     */ 
    createFeatureXML: function(feature) {
        var geometryNode = this.buildGeometryNode(feature.geometry);
        var geomContainer = this.createElementNS(this.featureNS, "feature:" + this.geometryName);
        geomContainer.appendChild(geometryNode);
        var featureContainer = this.createElementNS(this.featureNS, "feature:" + this.featureName);
        featureContainer.appendChild(geomContainer);
        for(var attr in feature.attributes) {
            var attrText = this.createTextNode(feature.attributes[attr]); 
            var nodename = attr;
            if (attr.search(":") != -1) {
                nodename = attr.split(":")[1];
            }    
            var attrContainer = this.createElementNS(this.featureNS, "feature:" + nodename);
            attrContainer.appendChild(attrText);
            featureContainer.appendChild(attrContainer);
        }    
        return featureContainer;
    },
    
    /**
     * Method: insert 
     * Takes a feature, and generates a WFS-T Transaction "Insert" 
     *
     * Parameters: 
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    insert: function(feature) {
        var insertNode = this.createElementNS(this.wfsns, 'wfs:Insert');
        insertNode.appendChild(this.createFeatureXML(feature));
        return insertNode;
    },
    
    /**
     * Method: update
     * Takes a feature, and generates a WFS-T Transaction "Update" 
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    update: function(feature) {
        if (!feature.fid) { OpenLayers.Console.userError(OpenLayers.i18n("noFID")); }
        var updateNode = this.createElementNS(this.wfsns, 'wfs:Update');
        updateNode.setAttribute("typeName", this.featurePrefix + ':' + this.featureName); 
        updateNode.setAttribute("xmlns:" + this.featurePrefix, this.featureNS); 

        var propertyNode = this.createElementNS(this.wfsns, 'wfs:Property');
        var nameNode = this.createElementNS(this.wfsns, 'wfs:Name');
        
        var txtNode = this.createTextNode(this.geometryName);
        nameNode.appendChild(txtNode);
        propertyNode.appendChild(nameNode);
        
        var valueNode = this.createElementNS(this.wfsns, 'wfs:Value');
        
        var geometryNode = this.buildGeometryNode(feature.geometry);
        
        if(feature.layer){
            geometryNode.setAttribute(
                "srsName", feature.layer.projection.getCode()
            );
        }
        
        valueNode.appendChild(geometryNode);
        
        propertyNode.appendChild(valueNode);
        updateNode.appendChild(propertyNode);
        
         // add in attributes
        for(var propName in feature.attributes) {
            propertyNode = this.createElementNS(this.wfsns, 'wfs:Property');
            nameNode = this.createElementNS(this.wfsns, 'wfs:Name');
            nameNode.appendChild(this.createTextNode(propName));
            propertyNode.appendChild(nameNode);
            valueNode = this.createElementNS(this.wfsns, 'wfs:Value');
            valueNode.appendChild(this.createTextNode(feature.attributes[propName]));
            propertyNode.appendChild(valueNode);
            updateNode.appendChild(propertyNode);
        }
        
        
        var filterNode = this.createElementNS(this.ogcns, 'ogc:Filter');
        var filterIdNode = this.createElementNS(this.ogcns, 'ogc:FeatureId');
        filterIdNode.setAttribute("fid", feature.fid);
        filterNode.appendChild(filterIdNode);
        updateNode.appendChild(filterNode);

        return updateNode;
    },
    
    /**
     * Method: remove 
     * Takes a feature, and generates a WFS-T Transaction "Delete" 
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    remove: function(feature) {
        if (!feature.fid) { 
            OpenLayers.Console.userError(OpenLayers.i18n("noFID")); 
            return false; 
        }
        var deleteNode = this.createElementNS(this.wfsns, 'wfs:Delete');
        deleteNode.setAttribute("typeName", this.featurePrefix + ':' + this.featureName); 
        deleteNode.setAttribute("xmlns:" + this.featurePrefix, this.featureNS); 

        var filterNode = this.createElementNS(this.ogcns, 'ogc:Filter');
        var filterIdNode = this.createElementNS(this.ogcns, 'ogc:FeatureId');
        filterIdNode.setAttribute("fid", feature.fid);
        filterNode.appendChild(filterIdNode);
        deleteNode.appendChild(filterNode);

        return deleteNode;
    },

    /**
     * APIMethod: destroy
     * Remove ciruclar ref to layer 
     */
    destroy: function() {
        this.layer = null;
    },

    CLASS_NAME: "OpenLayers.Format.WFS" 
});    
/* ======================================================================
    OpenLayers/Format/SLD/v1_0_0_GeoServer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/SLD/v1_0_0.js
 */

/**
 * Class: OpenLayers.Format.SLD/v1_0_0_GeoServer
 * Read and write SLD version 1.0.0 with GeoServer-specific enhanced options.
 * See http://svn.osgeo.org/geotools/trunk/modules/extension/xsd/xsd-sld/src/main/resources/org/geotools/sld/bindings/StyledLayerDescriptor.xsd
 * for more information.
 *
 * Inherits from:
 *  - <OpenLayers.Format.SLD.v1_0_0>
 */
OpenLayers.Format.SLD.v1_0_0_GeoServer = OpenLayers.Class(
    OpenLayers.Format.SLD.v1_0_0, {

    /**
     * Property: version
     * {String} The specific parser version.
     */
    version: "1.0.0",

    /**
     * Property: profile
     * {String} The specific profile
     */
    profile: "GeoServer",

   /**
     * Constructor: OpenLayers.Format.SLD.v1_0_0_GeoServer
     * Create a new parser for GeoServer-enhanced SLD version 1.0.0.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: OpenLayers.Util.applyDefaults({
        "sld": OpenLayers.Util.applyDefaults({
            "Priority": function(node, obj) {
                var value = this.readers.ogc._expression.call(this, node);
                if (value) {
                    obj.priority = value;
                }
            },
            "VendorOption": function(node, obj) {
                if (!obj.vendorOptions) {
                    obj.vendorOptions = {};
                }
                obj.vendorOptions[node.getAttribute("name")] = this.getChildValue(node);
            }
        }, OpenLayers.Format.SLD.v1_0_0.prototype.readers["sld"])
    }, OpenLayers.Format.SLD.v1_0_0.prototype.readers),

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: OpenLayers.Util.applyDefaults({
        "sld": OpenLayers.Util.applyDefaults({
            "Priority": function(priority) {
                return this.writers.sld._OGCExpression.call(
                    this, "sld:Priority", priority
                );
            },
            "VendorOption": function(option) {
                return this.createElementNSPlus("sld:VendorOption", {
                    attributes: {name: option.name},
                    value: option.value
                });
            },
            "TextSymbolizer": function(symbolizer) {
                var writers = OpenLayers.Format.SLD.v1_0_0.prototype.writers;
                var node = writers["sld"]["TextSymbolizer"].apply(this, arguments);
                if (symbolizer.graphic !== false && (symbolizer.externalGraphic || symbolizer.graphicName)) {
                    this.writeNode("Graphic", symbolizer, node);
                }
                if ("priority" in symbolizer) {
                    this.writeNode("Priority", symbolizer.priority, node);
                }
                return this.addVendorOptions(node, symbolizer);
            },
            "PointSymbolizer": function(symbolizer) {
                var writers = OpenLayers.Format.SLD.v1_0_0.prototype.writers;
                var node = writers["sld"]["PointSymbolizer"].apply(this, arguments);
                return this.addVendorOptions(node, symbolizer);
            },
            "LineSymbolizer": function(symbolizer) {
                var writers = OpenLayers.Format.SLD.v1_0_0.prototype.writers;
                var node = writers["sld"]["LineSymbolizer"].apply(this, arguments);
                return this.addVendorOptions(node, symbolizer);
            },
            "PolygonSymbolizer": function(symbolizer) {
                var writers = OpenLayers.Format.SLD.v1_0_0.prototype.writers;
                var node = writers["sld"]["PolygonSymbolizer"].apply(this, arguments);
                return this.addVendorOptions(node, symbolizer);
            }
        }, OpenLayers.Format.SLD.v1_0_0.prototype.writers["sld"])
    }, OpenLayers.Format.SLD.v1_0_0.prototype.writers),

    /**
     * Method: addVendorOptions
     * Add in the VendorOption tags and return the node again.
     *
     * Parameters:
     * node - {DOMElement} A DOM node.
     * symbolizer - {Object}
     *
     * Returns:
     * {DOMElement} A DOM node.
     */
    addVendorOptions: function(node, symbolizer) {
        var options = symbolizer.vendorOptions;
        if (options) {
            for (var key in symbolizer.vendorOptions) {
                this.writeNode("VendorOption", {
                    name: key, 
                    value: symbolizer.vendorOptions[key]
                }, node);
            }
        }
        return node;
    },

    CLASS_NAME: "OpenLayers.Format.SLD.v1_0_0_GeoServer"

});
/* ======================================================================
    OpenLayers/Layer/Boxes.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer.js
 * @requires OpenLayers/Layer/Markers.js
 */

/**
 * Class: OpenLayers.Layer.Boxes
 * Draw divs as 'boxes' on the layer. 
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Markers>
 */
OpenLayers.Layer.Boxes = OpenLayers.Class(OpenLayers.Layer.Markers, {

    /**
     * Constructor: OpenLayers.Layer.Boxes
     *
     * Parameters:
     * name - {String} 
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    
    /**
     * Method: drawMarker 
     * Calculate the pixel location for the marker, create it, and
     *    add it to the layer's div
     *
     * Parameters: 
     * marker - {<OpenLayers.Marker.Box>} 
     */
    drawMarker: function(marker) {
        var topleft = this.map.getLayerPxFromLonLat({
            lon: marker.bounds.left,
            lat: marker.bounds.top
        });
        var botright = this.map.getLayerPxFromLonLat({
            lon: marker.bounds.right,
            lat: marker.bounds.bottom
        });
        if (botright == null || topleft == null) {
            marker.display(false);
        } else {
            var markerDiv = marker.draw(topleft, {
                w: Math.max(1, botright.x - topleft.x),
                h: Math.max(1, botright.y - topleft.y)
            });
            if (!marker.drawn) {
                this.div.appendChild(markerDiv);
                marker.drawn = true;
            }
        }
    },


    /**
     * APIMethod: removeMarker 
     * 
     * Parameters:
     * marker - {<OpenLayers.Marker.Box>} 
     */
    removeMarker: function(marker) {
        OpenLayers.Util.removeItem(this.markers, marker);
        if ((marker.div != null) &&
            (marker.div.parentNode == this.div) ) {
            this.div.removeChild(marker.div);    
        }
    },

    CLASS_NAME: "OpenLayers.Layer.Boxes"
});
/* ======================================================================
    OpenLayers/Format/WFSCapabilities/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WFSCapabilities/v1.js
 */

/**
 * Class: OpenLayers.Format.WFSCapabilities/v1_0_0
 * Read WFS Capabilities version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WFSCapabilities.v1>
 */
OpenLayers.Format.WFSCapabilities.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.WFSCapabilities.v1, {
    
    /**
     * Constructor: OpenLayers.Format.WFSCapabilities.v1_0_0
     * Create a new parser for WFS capabilities version 1.0.0.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wfs": OpenLayers.Util.applyDefaults({
            "Service": function(node, capabilities) {
                capabilities.service = {};
                this.readChildNodes(node, capabilities.service);
            },
            "Fees": function(node, service) {
                var fees = this.getChildValue(node);
                if (fees && fees.toLowerCase() != "none") {
                    service.fees = fees;
                }
            },
            "AccessConstraints": function(node, service) {
                var constraints = this.getChildValue(node);
                if (constraints && constraints.toLowerCase() != "none") {
                    service.accessConstraints = constraints;
                }
            },
            "OnlineResource": function(node, service) {
                var onlineResource = this.getChildValue(node);
                if (onlineResource && onlineResource.toLowerCase() != "none") {
                    service.onlineResource = onlineResource;
                }
            },
            "Keywords": function(node, service) {
                var keywords = this.getChildValue(node);
                if (keywords && keywords.toLowerCase() != "none") {
                    service.keywords = keywords.split(', ');
                }
            },
            "Capability": function(node, capabilities) {
                capabilities.capability = {};
                this.readChildNodes(node, capabilities.capability);
            },
            "Request": function(node, obj) {
                obj.request = {};
                this.readChildNodes(node, obj.request);
            },
            "GetFeature": function(node, request) {
                request.getfeature = {
                    href: {}, // DCPType
                    formats: [] // ResultFormat
                };
                this.readChildNodes(node, request.getfeature);
            },
            "ResultFormat": function(node, obj) {
                var children = node.childNodes;
                var childNode;
                for(var i=0; i<children.length; i++) {
                    childNode = children[i];
                    if(childNode.nodeType == 1) {
                        obj.formats.push(childNode.nodeName);
                    }
                }
            },
            "DCPType": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "HTTP": function(node, obj) {
                this.readChildNodes(node, obj.href);
            },
            "Get": function(node, obj) {
                obj.get = node.getAttribute("onlineResource");
            },
            "Post": function(node, obj) {
                obj.post = node.getAttribute("onlineResource");
            },
            "SRS": function(node, obj) {
                var srs = this.getChildValue(node);
                if (srs) {
                    obj.srs = srs;
                }
            }
        }, OpenLayers.Format.WFSCapabilities.v1.prototype.readers["wfs"])
    },
    
    CLASS_NAME: "OpenLayers.Format.WFSCapabilities.v1_0_0" 

});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML/VersionedOGC.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities
 * Read WMS Capabilities.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML.VersionedOGC>
 */
OpenLayers.Format.WMSCapabilities = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
    
    /**
     * APIProperty: defaultVersion
     * {String} Version number to assume if none found.  Default is "1.1.1".
     */
    defaultVersion: "1.1.1",
    
    /**
     * APIProperty: profile
     * {String} If provided, use a custom profile.
     *
     * Currently supported profiles:
     * - WMSC - parses vendor specific capabilities for WMS-C.
     */
    profile: null,
    
    /**
     * Constructor: OpenLayers.Format.WMSCapabilities
     * Create a new parser for WMS capabilities.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return a list of layers. 
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} List of named layers.
     */
    
    CLASS_NAME: "OpenLayers.Format.WMSCapabilities" 

});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities.js
 * @requires OpenLayers/Format/OGCExceptionReport.js
 * @requires OpenLayers/Format/XML.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities.v1
 * Abstract class not to be instantiated directly. Creates
 * the common parts for both WMS 1.1.X and WMS 1.3.X.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WMSCapabilities.v1 = OpenLayers.Class(
    OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        wms: "http://www.opengis.net/wms",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "wms",
    
    /**
     * Constructor: OpenLayers.Format.WMSCapabilities.v1
     * Create an instance of one of the subclasses.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return a list of layers. 
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array} List of named layers.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var raw = data;
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var capabilities = {};
        this.readNode(data, capabilities);
        if (capabilities.service === undefined) {
            // an exception must have occurred, so parse it
            var parser = new OpenLayers.Format.OGCExceptionReport();
            capabilities.error = parser.read(raw);
        }
        return capabilities;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wms": {
            "Service": function(node, obj) {
                obj.service = {};
                this.readChildNodes(node, obj.service);
            },
            "Name": function(node, obj) {
                obj.name = this.getChildValue(node);
            },
            "Title": function(node, obj) {
                obj.title = this.getChildValue(node);
            },
            "Abstract": function(node, obj) {
                obj["abstract"] = this.getChildValue(node);
            },
            "BoundingBox": function(node, obj) {
                var bbox = {};
                bbox.bbox = [
                    parseFloat(node.getAttribute("minx")),
                    parseFloat(node.getAttribute("miny")),
                    parseFloat(node.getAttribute("maxx")),
                    parseFloat(node.getAttribute("maxy"))
                ];
                var res = {
                    x: parseFloat(node.getAttribute("resx")),
                    y: parseFloat(node.getAttribute("resy"))
                };

                if (! (isNaN(res.x) && isNaN(res.y))) {
                    bbox.res = res;
                }
                // return the bbox so that descendant classes can set the
                // CRS and SRS and add it to the obj
                return bbox;
            },
            "OnlineResource": function(node, obj) {
                obj.href = this.getAttributeNS(node, this.namespaces.xlink, 
                    "href");
            },
            "ContactInformation": function(node, obj) {
                obj.contactInformation = {};
                this.readChildNodes(node, obj.contactInformation);
            },
            "ContactPersonPrimary": function(node, obj) {
                obj.personPrimary = {};
                this.readChildNodes(node, obj.personPrimary);
            },
            "ContactPerson": function(node, obj) {
                obj.person = this.getChildValue(node);
            },
            "ContactOrganization": function(node, obj) {
                obj.organization = this.getChildValue(node);
            },
            "ContactPosition": function(node, obj) {
                obj.position = this.getChildValue(node);
            },
            "ContactAddress": function(node, obj) {
                obj.contactAddress = {};
                this.readChildNodes(node, obj.contactAddress);
            },
            "AddressType": function(node, obj) {
                obj.type = this.getChildValue(node);
            },
            "Address": function(node, obj) {
                obj.address = this.getChildValue(node);
            },
            "City": function(node, obj) {
                obj.city = this.getChildValue(node);
            },
            "StateOrProvince": function(node, obj) {
                obj.stateOrProvince = this.getChildValue(node);
            },
            "PostCode": function(node, obj) {
                obj.postcode = this.getChildValue(node);
            },
            "Country": function(node, obj) {
                obj.country = this.getChildValue(node);
            },
            "ContactVoiceTelephone": function(node, obj) {
                obj.phone = this.getChildValue(node);
            },
            "ContactFacsimileTelephone": function(node, obj) {
                obj.fax = this.getChildValue(node);
            },
            "ContactElectronicMailAddress": function(node, obj) {
                obj.email = this.getChildValue(node);
            },
            "Fees": function(node, obj) {
                var fees = this.getChildValue(node);
                if (fees && fees.toLowerCase() != "none") {
                    obj.fees = fees;
                }
            },
            "AccessConstraints": function(node, obj) {
                var constraints = this.getChildValue(node);
                if (constraints && constraints.toLowerCase() != "none") {
                    obj.accessConstraints = constraints;
                }
            },
            "Capability": function(node, obj) {
                obj.capability = {
                    nestedLayers: [],
                    layers: []
                };
                this.readChildNodes(node, obj.capability);
            },
            "Request": function(node, obj) {
                obj.request = {};
                this.readChildNodes(node, obj.request);
            },
            "GetCapabilities": function(node, obj) {
                obj.getcapabilities = {formats: []};
                this.readChildNodes(node, obj.getcapabilities);
            },
            "Format": function(node, obj) {
                if (OpenLayers.Util.isArray(obj.formats)) {
                    obj.formats.push(this.getChildValue(node));
                } else {
                    obj.format = this.getChildValue(node);
                }
            },
            "DCPType": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "HTTP": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Get": function(node, obj) {
                obj.get = {};
                this.readChildNodes(node, obj.get);
                // backwards compatibility
                if (!obj.href) {
                    obj.href = obj.get.href;
                }
            },
            "Post": function(node, obj) {
                obj.post = {};
                this.readChildNodes(node, obj.post);
                // backwards compatibility
                if (!obj.href) {
                    obj.href = obj.get.href;
                }
            },
            "GetMap": function(node, obj) {
                obj.getmap = {formats: []};
                this.readChildNodes(node, obj.getmap);
            },
            "GetFeatureInfo": function(node, obj) {
                obj.getfeatureinfo = {formats: []};
                this.readChildNodes(node, obj.getfeatureinfo);
            },
            "Exception": function(node, obj) {
                obj.exception = {formats: []};
                this.readChildNodes(node, obj.exception);
            },
            "Layer": function(node, obj) {
                var parentLayer, capability;
                if (obj.capability) {
                    capability = obj.capability;
                    parentLayer = obj;
                } else {
                    capability = obj;
                }
                var attrNode = node.getAttributeNode("queryable");
                var queryable = (attrNode && attrNode.specified) ? 
                    node.getAttribute("queryable") : null;
                attrNode = node.getAttributeNode("cascaded");
                var cascaded = (attrNode && attrNode.specified) ?
                    node.getAttribute("cascaded") : null;
                attrNode = node.getAttributeNode("opaque");
                var opaque = (attrNode && attrNode.specified) ?
                    node.getAttribute('opaque') : null;
                var noSubsets = node.getAttribute('noSubsets');
                var fixedWidth = node.getAttribute('fixedWidth');
                var fixedHeight = node.getAttribute('fixedHeight');
                var parent = parentLayer || {},
                    extend = OpenLayers.Util.extend;
                var layer = {
                    nestedLayers: [],
                    styles: parentLayer ? [].concat(parentLayer.styles) : [],
                    srs: parentLayer ? extend({}, parent.srs) : {}, 
                    metadataURLs: [],
                    bbox: parentLayer ? extend({}, parent.bbox) : {},
                    llbbox: parent.llbbox,
                    dimensions: parentLayer ? extend({}, parent.dimensions) : {},
                    authorityURLs: parentLayer ? extend({}, parent.authorityURLs) : {},
                    identifiers: {},
                    keywords: [],
                    queryable: (queryable && queryable !== "") ? 
                        (queryable === "1" || queryable === "true" ) :
                        (parent.queryable || false),
                    cascaded: (cascaded !== null) ? parseInt(cascaded) :
                        (parent.cascaded || 0),
                    opaque: opaque ? 
                        (opaque === "1" || opaque === "true" ) :
                        (parent.opaque || false),
                    noSubsets: (noSubsets !== null) ? 
                        (noSubsets === "1" || noSubsets === "true" ) :
                        (parent.noSubsets || false),
                    fixedWidth: (fixedWidth != null) ? 
                        parseInt(fixedWidth) : (parent.fixedWidth || 0),
                    fixedHeight: (fixedHeight != null) ? 
                        parseInt(fixedHeight) : (parent.fixedHeight || 0),
                    minScale: parent.minScale,
                    maxScale: parent.maxScale,
                    attribution: parent.attribution
                };
                obj.nestedLayers.push(layer);
                layer.capability = capability;
                this.readChildNodes(node, layer);
                delete layer.capability;
                if(layer.name) {
                    var parts = layer.name.split(":"),
                        request = capability.request,
                        gfi = request.getfeatureinfo;
                    if(parts.length > 0) {
                        layer.prefix = parts[0];
                    }
                    capability.layers.push(layer);
                    if (layer.formats === undefined) {
                        layer.formats = request.getmap.formats;
                    }
                    if (layer.infoFormats === undefined && gfi) {
                        layer.infoFormats = gfi.formats;
                    }
                }
            },
            "Attribution": function(node, obj) {
                obj.attribution = {};
                this.readChildNodes(node, obj.attribution);
            },
            "LogoURL": function(node, obj) {
                obj.logo = {
                    width: node.getAttribute("width"),
                    height: node.getAttribute("height")
                };
                this.readChildNodes(node, obj.logo);
            },
            "Style": function(node, obj) {
                var style = {};
                obj.styles.push(style);
                this.readChildNodes(node, style);
            },
            "LegendURL": function(node, obj) {
                var legend = {
                    width: node.getAttribute("width"),
                    height: node.getAttribute("height")
                };
                obj.legend = legend;
                this.readChildNodes(node, legend);
            },
            "MetadataURL": function(node, obj) {
                var metadataURL = {type: node.getAttribute("type")};
                obj.metadataURLs.push(metadataURL);
                this.readChildNodes(node, metadataURL);
            },
            "DataURL": function(node, obj) {
                obj.dataURL = {};
                this.readChildNodes(node, obj.dataURL);
            },
            "FeatureListURL": function(node, obj) {
                obj.featureListURL = {};
                this.readChildNodes(node, obj.featureListURL);
            },
            "AuthorityURL": function(node, obj) {
                var name = node.getAttribute("name");
                var authority = {};
                this.readChildNodes(node, authority);
                obj.authorityURLs[name] = authority.href;
            },
            "Identifier": function(node, obj) {
                var authority = node.getAttribute("authority");
                obj.identifiers[authority] = this.getChildValue(node);
            },
            "KeywordList": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "SRS": function(node, obj) {
                obj.srs[this.getChildValue(node)] = true;
            }
        }
    },

    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1" 

});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1_3.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities/v1.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities/v1_3
 * Abstract base class for WMS Capabilities version 1.3.X. 
 * SLD 1.1.0 adds in the extra operations DescribeLayer and GetLegendGraphic, 
 * see: http://schemas.opengis.net/sld/1.1.0/sld_capabilities.xsd
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMSCapabilities.v1>
 */
OpenLayers.Format.WMSCapabilities.v1_3 = OpenLayers.Class(
    OpenLayers.Format.WMSCapabilities.v1, {
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wms": OpenLayers.Util.applyDefaults({
            "WMS_Capabilities": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "LayerLimit": function(node, obj) {
                obj.layerLimit = parseInt(this.getChildValue(node));
            },
            "MaxWidth": function(node, obj) {
                obj.maxWidth = parseInt(this.getChildValue(node));
            },
            "MaxHeight": function(node, obj) {
                obj.maxHeight = parseInt(this.getChildValue(node));
            },
            "BoundingBox": function(node, obj) {
                var bbox = OpenLayers.Format.WMSCapabilities.v1.prototype.readers["wms"].BoundingBox.apply(this, [node, obj]);
                bbox.srs  = node.getAttribute("CRS");
                obj.bbox[bbox.srs] = bbox;
            },
            "CRS": function(node, obj) {
                // CRS is the synonym of SRS
                this.readers.wms.SRS.apply(this, [node, obj]); 
            },
            "EX_GeographicBoundingBox": function(node, obj) {
                // replacement of LatLonBoundingBox
                obj.llbbox = [];
                this.readChildNodes(node, obj.llbbox);
                
            },
            "westBoundLongitude": function(node, obj) {
                obj[0] = this.getChildValue(node);
            },
            "eastBoundLongitude": function(node, obj) {
                obj[2] = this.getChildValue(node);
            },
            "southBoundLatitude": function(node, obj) {
                obj[1] = this.getChildValue(node);
            },
            "northBoundLatitude": function(node, obj) {
                obj[3] = this.getChildValue(node);
            },
            "MinScaleDenominator": function(node, obj) {
                obj.maxScale = parseFloat(this.getChildValue(node)).toPrecision(16);
            },
            "MaxScaleDenominator": function(node, obj) {
                obj.minScale = parseFloat(this.getChildValue(node)).toPrecision(16);
            },
            "Dimension": function(node, obj) {
                // dimension has extra attributes: default, multipleValues, 
                // nearestValue, current which used to be part of Extent. It now
                // also contains the values.
                var name = node.getAttribute("name").toLowerCase();
                var dim = {
                    name: name,
                    units: node.getAttribute("units"),
                    unitsymbol: node.getAttribute("unitSymbol"),
                    nearestVal: node.getAttribute("nearestValue") === "1",
                    multipleVal: node.getAttribute("multipleValues") === "1",
                    "default": node.getAttribute("default") || "",
                    current: node.getAttribute("current") === "1",
                    values: this.getChildValue(node).split(",")
                    
                };
                // Theoretically there can be more dimensions with the same
                // name, but with a different unit. Until we meet such a case,
                // let's just keep the same structure as the WMS 1.1 
                // GetCapabilities parser uses. We will store the last
                // one encountered.
                obj.dimensions[dim.name] = dim;
            },
            "Keyword": function(node, obj) {
                // TODO: should we change the structure of keyword in v1.js?
                // Make it an object with a value instead of a string?
                var keyword = {value: this.getChildValue(node), 
                    vocabulary: node.getAttribute("vocabulary")};
                if (obj.keywords) {
                    obj.keywords.push(keyword);
                }
            }
        }, OpenLayers.Format.WMSCapabilities.v1.prototype.readers["wms"]),
        "sld": {
            "UserDefinedSymbolization": function(node, obj) {
                this.readers.wms.UserDefinedSymbolization.apply(this, [node, obj]);
                // add the two extra attributes
                obj.userSymbols.inlineFeature = parseInt(node.getAttribute("InlineFeature")) == 1;
                obj.userSymbols.remoteWCS = parseInt(node.getAttribute("RemoteWCS")) == 1;
            },
            "DescribeLayer": function(node, obj) {
                this.readers.wms.DescribeLayer.apply(this, [node, obj]);
            },
            "GetLegendGraphic": function(node, obj) {
                this.readers.wms.GetLegendGraphic.apply(this, [node, obj]);
            }
        }
    },
    
    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_3" 

});
/* ======================================================================
    OpenLayers/Layer/Zoomify.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/*
 * Development supported by a R&D grant DC08P02OUK006 - Old Maps Online
 * (www.oldmapsonline.org) from Ministry of Culture of the Czech Republic.
 */


/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.Zoomify
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.Zoomify = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /**
     * Property: size
     * {<OpenLayers.Size>} The Zoomify image size in pixels.
     */
    size: null,

    /**
     * APIProperty: isBaseLayer
     * {Boolean}
     */
    isBaseLayer: true,

    /**
     * Property: standardTileSize
     * {Integer} The size of a standard (non-border) square tile in pixels.
     */
    standardTileSize: 256,

    /** 
     * Property: tileOriginCorner
     * {String} This layer uses top-left as tile origin
     **/
    tileOriginCorner: "tl",

    /**
     * Property: numberOfTiers
     * {Integer} Depth of the Zoomify pyramid, number of tiers (zoom levels)
     *                          - filled during Zoomify pyramid initialization.
     */
    numberOfTiers: 0,

    /**
     * Property: tileCountUpToTier
     * {Array(Integer)} Number of tiles up to the given tier of pyramid.
     *                          - filled during Zoomify pyramid initialization.
     */
    tileCountUpToTier: null,

    /**
     * Property: tierSizeInTiles
     * {Array(<OpenLayers.Size>)} Size (in tiles) for each tier of pyramid.
     *                          - filled during Zoomify pyramid initialization.
     */
    tierSizeInTiles: null,

    /**
     * Property: tierImageSize
     * {Array(<OpenLayers.Size>)} Image size in pixels for each pyramid tier.
     *                          - filled during Zoomify pyramid initialization.
     */
    tierImageSize: null,

    /**
     * Constructor: OpenLayers.Layer.Zoomify
     *
     * Parameters:
     * name - {String} A name for the layer.
     * url - {String} - Relative or absolute path to the image or more
     *        precisly to the TileGroup[X] directories root.
     *        Flash plugin use the variable name "zoomifyImagePath" for this.
     * size - {<OpenLayers.Size>} The size (in pixels) of the image.
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, url, size, options) {

        // initilize the Zoomify pyramid for given size
        this.initializeZoomify(size);

        OpenLayers.Layer.Grid.prototype.initialize.apply(this, [
            name, url, size, {}, options
        ]);
    },

    /**
     * Method: initializeZoomify
     * It generates constants for all tiers of the Zoomify pyramid
     *
     * Parameters:
     * size - {<OpenLayers.Size>} The size of the image in pixels
     *
     */
    initializeZoomify: function( size ) {

        var imageSize = size.clone();
        var tiles = new OpenLayers.Size(
            Math.ceil( imageSize.w / this.standardTileSize ),
            Math.ceil( imageSize.h / this.standardTileSize )
            );

        this.tierSizeInTiles = [tiles];
        this.tierImageSize = [imageSize];

        while (imageSize.w > this.standardTileSize ||
               imageSize.h > this.standardTileSize ) {

            imageSize = new OpenLayers.Size(
                Math.floor( imageSize.w / 2 ),
                Math.floor( imageSize.h / 2 )
                );
            tiles = new OpenLayers.Size(
                Math.ceil( imageSize.w / this.standardTileSize ),
                Math.ceil( imageSize.h / this.standardTileSize )
                );
            this.tierSizeInTiles.push( tiles );
            this.tierImageSize.push( imageSize );
        }

        this.tierSizeInTiles.reverse();
        this.tierImageSize.reverse();

        this.numberOfTiers = this.tierSizeInTiles.length;

        this.tileCountUpToTier = [0];
        for (var i = 1; i < this.numberOfTiers; i++) {
            this.tileCountUpToTier.push(
                this.tierSizeInTiles[i-1].w * this.tierSizeInTiles[i-1].h +
                this.tileCountUpToTier[i-1]
                );
        }
    },

    /**
     * APIMethod:destroy
     */
    destroy: function() {
        // for now, nothing special to do here.
        OpenLayers.Layer.Grid.prototype.destroy.apply(this, arguments);

        // Remove from memory the Zoomify pyramid - is that enough?
        this.tileCountUpToTier.length = 0;
        this.tierSizeInTiles.length = 0;
        this.tierImageSize.length = 0;

    },

    /**
     * APIMethod: clone
     *
     * Parameters:
     * obj - {Object}
     *
     * Returns:
     * {<OpenLayers.Layer.Zoomify>} An exact clone of this <OpenLayers.Layer.Zoomify>
     */
    clone: function (obj) {

        if (obj == null) {
            obj = new OpenLayers.Layer.Zoomify(this.name,
                                           this.url,
                                           this.size,
                                           this.options);
        }

        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },

    /**
     * Method: getURL
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     *
     * Returns:
     * {String} A string with the layer's url and parameters and also the
     *          passed-in bounds and appropriate tile size specified as
     *          parameters
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        var res = this.map.getResolution();
        var x = Math.round((bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w));
        var y = Math.round((this.tileOrigin.lat - bounds.top) / (res * this.tileSize.h));
        var z = this.map.getZoom();

        var tileIndex = x + y * this.tierSizeInTiles[z].w + this.tileCountUpToTier[z];
        var path = "TileGroup" + Math.floor( (tileIndex) / 256 ) +
            "/" + z + "-" + x + "-" + y + ".jpg";
        var url = this.url;
        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(path, url);
        }
        return url + path;
    },

    /**
     * Method: getImageSize
     * getImageSize returns size for a particular tile. If bounds are given as
     * first argument, size is calculated (bottom-right tiles are non square).
     *
     */
    getImageSize: function() {
        if (arguments.length > 0) {
            var bounds = this.adjustBounds(arguments[0]);
            var res = this.map.getResolution();
            var x = Math.round((bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w));
            var y = Math.round((this.tileOrigin.lat - bounds.top) / (res * this.tileSize.h));
            var z = this.map.getZoom();
            var w = this.standardTileSize;
            var h = this.standardTileSize;
            if (x == this.tierSizeInTiles[z].w -1 ) {
                var w = this.tierImageSize[z].w % this.standardTileSize;
            }
            if (y == this.tierSizeInTiles[z].h -1 ) {
                var h = this.tierImageSize[z].h % this.standardTileSize;
            }
            return (new OpenLayers.Size(w, h));
        } else {
            return this.tileSize;
        }
    },

    /**
     * APIMethod: setMap
     * When the layer is added to a map, then we can fetch our origin
     *    (if we don't have one.)
     *
     * Parameters:
     * map - {<OpenLayers.Map>}
     */
    setMap: function(map) {
        OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
        this.tileOrigin = new OpenLayers.LonLat(this.map.maxExtent.left,
                                                this.map.maxExtent.top);
    },

    /**
     * Method: calculateGridLayout
     * Generate parameters for the grid layout. This
     *
     * Parameters:
     * bounds - {<OpenLayers.Bound>}
     * origin - {<OpenLayers.LonLat>}
     * resolution - {Number}
     *
     * Returns:
     * {Object} Object containing properties tilelon, tilelat, tileoffsetlat,
     * tileoffsetlat, tileoffsetx, tileoffsety
     */
    calculateGridLayout: function(bounds, origin, resolution) {
        var tilelon = resolution * this.tileSize.w;
        var tilelat = resolution * this.tileSize.h;

        var offsetlon = bounds.left - origin.lon;
        var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
        var tilecolremain = offsetlon/tilelon - tilecol;
        var tileoffsetx = -tilecolremain * this.tileSize.w;
        var tileoffsetlon = origin.lon + tilecol * tilelon;

        var offsetlat = origin.lat - bounds.top + tilelat;
        var tilerow = Math.floor(offsetlat/tilelat) - this.buffer;
        var tilerowremain = tilerow - offsetlat/tilelat;
        var tileoffsety = tilerowremain * this.tileSize.h;
        var tileoffsetlat = origin.lat - tilelat*tilerow;

        return {
          tilelon: tilelon, tilelat: tilelat,
          tileoffsetlon: tileoffsetlon, tileoffsetlat: tileoffsetlat,
          tileoffsetx: tileoffsetx, tileoffsety: tileoffsety
        };
    },

    CLASS_NAME: "OpenLayers.Layer.Zoomify"
});
/* ======================================================================
    OpenLayers/Layer/MapServer.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.MapServer
 * Instances of OpenLayers.Layer.MapServer are used to display
 * data from a MapServer CGI instance.
 *
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.MapServer = OpenLayers.Class(OpenLayers.Layer.Grid, {

    /**
     * Constant: DEFAULT_PARAMS
     * {Object} Hashtable of default parameter key/value pairs 
     */
    DEFAULT_PARAMS: {
        mode: "map",
        map_imagetype: "png"
    },

    /**
     * Constructor: OpenLayers.Layer.MapServer
     * Create a new MapServer layer object
     *
     * Parameters:
     * name - {String} A name for the layer
     * url - {String} Base url for the MapServer CGI
     *       (e.g. http://www2.dmsolutions.ca/cgi-bin/mapserv)
     * params - {Object} An object with key/value pairs representing the
     *          GetMap query string parameters and parameter values.
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
    initialize: function(name, url, params, options) {
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, arguments);

        this.params = OpenLayers.Util.applyDefaults(
            this.params, this.DEFAULT_PARAMS
        );

        // unless explicitly set in options, if the layer is transparent, 
        // it will be an overlay
        if (options == null || options.isBaseLayer == null) {
            this.isBaseLayer = ((this.params.transparent != "true") && 
                                (this.params.transparent != true));
        }
    },

    /**
     * Method: clone
     * Create a clone of this layer
     *
     * Returns:
     * {<OpenLayers.Layer.MapServer>} An exact clone of this layer
     */
    clone: function (obj) {
        if (obj == null) {
            obj = new OpenLayers.Layer.MapServer(this.name,
                                           this.url,
                                           this.params,
                                           this.getOptions());
        }
        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        // copy/set any non-init, non-simple values here

        return obj;
    },
    
    /**
     * Method: getURL
     * Return a query string for this layer
     *
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} A bounds representing the bbox 
     *                                for the request
     *
     * Returns:
     * {String} A string with the layer's url and parameters and also 
     *          the passed-in bounds and appropriate tile size specified 
     *          as parameters.
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        // Make a list, so that getFullRequestString uses literal "," 
        var extent = [bounds.left, bounds. bottom, bounds.right, bounds.top];

        var imageSize = this.getImageSize(); 
        
        // make lists, so that literal ','s are used 
        var url = this.getFullRequestString(
                     {mapext:   extent,
                      imgext:   extent,
                      map_size: [imageSize.w, imageSize.h],
                      imgx:     imageSize.w / 2,
                      imgy:     imageSize.h / 2,
                      imgxy:    [imageSize.w, imageSize.h]
                      });
        
        return url;
    },
    
    /** 
     * Method: getFullRequestString
     * combine the layer's url with its params and these newParams. 
     *   
     * Parameters:
     * newParams - {Object} New parameters that should be added to the 
     *                      request string.
     * altUrl - {String} (optional) Replace the URL in the full request  
     *                              string with the provided URL.
     * 
     * Returns: 
     * {String} A string with the layer's url and parameters embedded in it.
     */
    getFullRequestString:function(newParams, altUrl) {
        // use layer's url unless altUrl passed in
        var url = (altUrl == null) ? this.url : altUrl;
        
        // create a new params hashtable with all the layer params and the 
        // new params together. then convert to string
        var allParams = OpenLayers.Util.extend({}, this.params);
        allParams = OpenLayers.Util.extend(allParams, newParams);
        var paramsString = OpenLayers.Util.getParameterString(allParams);
        
        // if url is not a string, it should be an array of strings, 
        // in which case we will deterministically select one of them in 
        // order to evenly distribute requests to different urls.
        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(paramsString, url);
        }   
        
        // ignore parameters that are already in the url search string
        var urlParams = OpenLayers.Util.upperCaseObject(
                            OpenLayers.Util.getParameters(url));
        for(var key in allParams) {
            if(key.toUpperCase() in urlParams) {
                delete allParams[key];
            }
        }
        paramsString = OpenLayers.Util.getParameterString(allParams);
        
        // requestString always starts with url
        var requestString = url;        

        // MapServer needs '+' seperating things like bounds/height/width.
        //   Since typically this is URL encoded, we use a slight hack: we
        //  depend on the list-like functionality of getParameterString to
        //  leave ',' only in the case of list items (since otherwise it is
        //  encoded) then do a regular expression replace on the , characters
        //  to '+'
        //
        paramsString = paramsString.replace(/,/g, "+");
        
        if (paramsString != "") {
            var lastServerChar = url.charAt(url.length - 1);
            if ((lastServerChar == "&") || (lastServerChar == "?")) {
                requestString += paramsString;
            } else {
                if (url.indexOf('?') == -1) {
                    //serverPath has no ? -- add one
                    requestString += '?' + paramsString;
                } else {
                    //serverPath contains ?, so must already have paramsString at the end
                    requestString += '&' + paramsString;
                }
            }
        }
        return requestString;
    },

    CLASS_NAME: "OpenLayers.Layer.MapServer"
});
/* ======================================================================
    OpenLayers/Renderer/VML.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Renderer/Elements.js
 */

/**
 * Class: OpenLayers.Renderer.VML
 * Render vector features in browsers with VML capability.  Construct a new
 * VML renderer with the <OpenLayers.Renderer.VML> constructor.
 * 
 * Note that for all calculations in this class, we use (num | 0) to truncate a 
 * float value to an integer. This is done because it seems that VML doesn't 
 * support float values.
 *
 * Inherits from:
 *  - <OpenLayers.Renderer.Elements>
 */
OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {

    /**
     * Property: xmlns
     * {String} XML Namespace URN
     */
    xmlns: "urn:schemas-microsoft-com:vml",
    
    /**
     * Property: symbolCache
     * {DOMElement} node holding symbols. This hash is keyed by symbol name,
     *     and each value is a hash with a "path" and an "extent" property.
     */
    symbolCache: {},

    /**
     * Property: offset
     * {Object} Hash with "x" and "y" properties
     */
    offset: null,
    
    /**
     * Constructor: OpenLayers.Renderer.VML
     * Create a new VML renderer.
     *
     * Parameters:
     * containerID - {String} The id for the element that contains the renderer
     */
    initialize: function(containerID) {
        if (!this.supported()) { 
            return; 
        }
        if (!document.namespaces.olv) {
            document.namespaces.add("olv", this.xmlns);
            var style = document.createStyleSheet();
            var shapes = ['shape','rect', 'oval', 'fill', 'stroke', 'imagedata', 'group','textbox']; 
            for (var i = 0, len = shapes.length; i < len; i++) {

                style.addRule('olv\\:' + shapes[i], "behavior: url(#default#VML); " +
                              "position: absolute; display: inline-block;");
            }                  
        }
        
        OpenLayers.Renderer.Elements.prototype.initialize.apply(this, 
                                                                arguments);
    },

    /**
     * APIMethod: supported
     * Determine whether a browser supports this renderer.
     *
     * Returns:
     * {Boolean} The browser supports the VML renderer
     */
    supported: function() {
        return !!(document.namespaces);
    },    

    /**
     * Method: setExtent
     * Set the renderer's extent
     *
     * Parameters:
     * extent - {<OpenLayers.Bounds>}
     * resolutionChanged - {Boolean}
     * 
     * Returns:
     * {Boolean} true to notify the layer that the new extent does not exceed
     *     the coordinate range, and the features will not need to be redrawn.
     */
    setExtent: function(extent, resolutionChanged) {
        var coordSysUnchanged = OpenLayers.Renderer.Elements.prototype.setExtent.apply(this, arguments);
        var resolution = this.getResolution();
    
        var left = (extent.left/resolution) | 0;
        var top = (extent.top/resolution - this.size.h) | 0;
        if (resolutionChanged || !this.offset) {
            this.offset = {x: left, y: top};
            left = 0;
            top = 0;
        } else {
            left = left - this.offset.x;
            top = top - this.offset.y;
        }

        
        var org = (left - this.xOffset) + " " + top;
        this.root.coordorigin = org;
        var roots = [this.root, this.vectorRoot, this.textRoot];
        var root;
        for(var i=0, len=roots.length; i<len; ++i) {
            root = roots[i];

            var size = this.size.w + " " + this.size.h;
            root.coordsize = size;
            
        }
        // flip the VML display Y axis upside down so it 
        // matches the display Y axis of the map
        this.root.style.flip = "y";
        
        return coordSysUnchanged;
    },


    /**
     * Method: setSize
     * Set the size of the drawing surface
     *
     * Parameters:
     * size - {<OpenLayers.Size>} the size of the drawing surface
     */
    setSize: function(size) {
        OpenLayers.Renderer.prototype.setSize.apply(this, arguments);
        
        // setting width and height on all roots to avoid flicker which we
        // would get with 100% width and height on child roots
        var roots = [
            this.rendererRoot,
            this.root,
            this.vectorRoot,
            this.textRoot
        ];
        var w = this.size.w + "px";
        var h = this.size.h + "px";
        var root;
        for(var i=0, len=roots.length; i<len; ++i) {
            root = roots[i];
            root.style.width = w;
            root.style.height = h;
        }
    },

    /**
     * Method: getNodeType
     * Get the node type for a geometry and style
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     * style - {Object}
     *
     * Returns:
     * {String} The corresponding node type for the specified geometry
     */
    getNodeType: function(geometry, style) {
        var nodeType = null;
        switch (geometry.CLASS_NAME) {
            case "OpenLayers.Geometry.Point":
                if (style.externalGraphic) {
                    nodeType = "olv:rect";
                } else if (this.isComplexSymbol(style.graphicName)) {
                    nodeType = "olv:shape";
                } else {
                    nodeType = "olv:oval";
                }
                break;
            case "OpenLayers.Geometry.Rectangle":
                nodeType = "olv:rect";
                break;
            case "OpenLayers.Geometry.LineString":
            case "OpenLayers.Geometry.LinearRing":
            case "OpenLayers.Geometry.Polygon":
            case "OpenLayers.Geometry.Curve":
                nodeType = "olv:shape";
                break;
            default:
                break;
        }
        return nodeType;
    },

    /**
     * Method: setStyle
     * Use to set all the style attributes to a VML node.
     *
     * Parameters:
     * node - {DOMElement} An VML element to decorate
     * style - {Object}
     * options - {Object} Currently supported options include 
     *                              'isFilled' {Boolean} and
     *                              'isStroked' {Boolean}
     * geometry - {<OpenLayers.Geometry>}
     */
    setStyle: function(node, style, options, geometry) {
        style = style  || node._style;
        options = options || node._options;
        var fillColor = style.fillColor;

        if (node._geometryClass === "OpenLayers.Geometry.Point") {
            if (style.externalGraphic) {
                options.isFilled = true;
                if (style.graphicTitle) {
                    node.title=style.graphicTitle;
                } 
                var width = style.graphicWidth || style.graphicHeight;
                var height = style.graphicHeight || style.graphicWidth;
                width = width ? width : style.pointRadius*2;
                height = height ? height : style.pointRadius*2;

                var resolution = this.getResolution();
                var xOffset = (style.graphicXOffset != undefined) ?
                    style.graphicXOffset : -(0.5 * width);
                var yOffset = (style.graphicYOffset != undefined) ?
                    style.graphicYOffset : -(0.5 * height);
                
                node.style.left = ((((geometry.x - this.featureDx)/resolution - this.offset.x)+xOffset) | 0) + "px";
                node.style.top = (((geometry.y/resolution - this.offset.y)-(yOffset+height)) | 0) + "px";
                node.style.width = width + "px";
                node.style.height = height + "px";
                node.style.flip = "y";
                
                // modify fillColor and options for stroke styling below
                fillColor = "none";
                options.isStroked = false;
            } else if (this.isComplexSymbol(style.graphicName)) {
                var cache = this.importSymbol(style.graphicName);
                node.path = cache.path;
                node.coordorigin = cache.left + "," + cache.bottom;
                var size = cache.size;
                node.coordsize = size + "," + size;        
                this.drawCircle(node, geometry, style.pointRadius);
                node.style.flip = "y";
            } else {
                this.drawCircle(node, geometry, style.pointRadius);
            }
        }

        // fill 
        if (options.isFilled) { 
            node.fillcolor = fillColor; 
        } else { 
            node.filled = "false"; 
        }
        var fills = node.getElementsByTagName("fill");
        var fill = (fills.length == 0) ? null : fills[0];
        if (!options.isFilled) {
            if (fill) {
                node.removeChild(fill);
            }
        } else {
            if (!fill) {
                fill = this.createNode('olv:fill', node.id + "_fill");
            }
            fill.opacity = style.fillOpacity;

            if (node._geometryClass === "OpenLayers.Geometry.Point" &&
                    style.externalGraphic) {

                // override fillOpacity
                if (style.graphicOpacity) {
                    fill.opacity = style.graphicOpacity;
                }
                
                fill.src = style.externalGraphic;
                fill.type = "frame";
                
                if (!(style.graphicWidth && style.graphicHeight)) {
                  fill.aspect = "atmost";
                }                
            }
            if (fill.parentNode != node) {
                node.appendChild(fill);
            }
        }

        // additional rendering for rotated graphics or symbols
        var rotation = style.rotation;
        if ((rotation !== undefined || node._rotation !== undefined)) {
            node._rotation = rotation;
            if (style.externalGraphic) {
                this.graphicRotate(node, xOffset, yOffset, style);
                // make the fill fully transparent, because we now have
                // the graphic as imagedata element. We cannot just remove
                // the fill, because this is part of the hack described
                // in graphicRotate
                fill.opacity = 0;
            } else if(node._geometryClass === "OpenLayers.Geometry.Point") {
                node.style.rotation = rotation || 0;
            }
        }

        // stroke 
        var strokes = node.getElementsByTagName("stroke");
        var stroke = (strokes.length == 0) ? null : strokes[0];
        if (!options.isStroked) {
            node.stroked = false;
            if (stroke) {
                stroke.on = false;
            }
        } else {
            if (!stroke) {
                stroke = this.createNode('olv:stroke', node.id + "_stroke");
                node.appendChild(stroke);
            }
            stroke.on = true;
            stroke.color = style.strokeColor; 
            stroke.weight = style.strokeWidth + "px"; 
            stroke.opacity = style.strokeOpacity;
            stroke.endcap = style.strokeLinecap == 'butt' ? 'flat' :
                (style.strokeLinecap || 'round');
            if (style.strokeDashstyle) {
                stroke.dashstyle = this.dashStyle(style);
            }
        }
        
        if (style.cursor != "inherit" && style.cursor != null) {
            node.style.cursor = style.cursor;
        }
        return node;
    },

    /**
     * Method: graphicRotate
     * If a point is to be styled with externalGraphic and rotation, VML fills
     * cannot be used to display the graphic, because rotation of graphic
     * fills is not supported by the VML implementation of Internet Explorer.
     * This method creates a olv:imagedata element inside the VML node,
     * DXImageTransform.Matrix and BasicImage filters for rotation and
     * opacity, and a 3-step hack to remove rendering artefacts from the
     * graphic and preserve the ability of graphics to trigger events.
     * Finally, OpenLayers methods are used to determine the correct
     * insertion point of the rotated image, because DXImageTransform.Matrix
     * does the rotation without the ability to specify a rotation center
     * point.
     * 
     * Parameters:
     * node    - {DOMElement}
     * xOffset - {Number} rotation center relative to image, x coordinate
     * yOffset - {Number} rotation center relative to image, y coordinate
     * style   - {Object}
     */
    graphicRotate: function(node, xOffset, yOffset, style) {
        var style = style || node._style;
        var rotation = style.rotation || 0;
        
        var aspectRatio, size;
        if (!(style.graphicWidth && style.graphicHeight)) {
            // load the image to determine its size
            var img = new Image();
            img.onreadystatechange = OpenLayers.Function.bind(function() {
                if(img.readyState == "complete" ||
                        img.readyState == "interactive") {
                    aspectRatio = img.width / img.height;
                    size = Math.max(style.pointRadius * 2, 
                        style.graphicWidth || 0,
                        style.graphicHeight || 0);
                    xOffset = xOffset * aspectRatio;
                    style.graphicWidth = size * aspectRatio;
                    style.graphicHeight = size;
                    this.graphicRotate(node, xOffset, yOffset, style);
                }
            }, this);
            img.src = style.externalGraphic;
            
            // will be called again by the onreadystate handler
            return;
        } else {
            size = Math.max(style.graphicWidth, style.graphicHeight);
            aspectRatio = style.graphicWidth / style.graphicHeight;
        }
        
        var width = Math.round(style.graphicWidth || size * aspectRatio);
        var height = Math.round(style.graphicHeight || size);
        node.style.width = width + "px";
        node.style.height = height + "px";
        
        // Three steps are required to remove artefacts for images with
        // transparent backgrounds (resulting from using DXImageTransform
        // filters on svg objects), while preserving awareness for browser
        // events on images:
        // - Use the fill as usual (like for unrotated images) to handle
        //   events
        // - specify an imagedata element with the same src as the fill
        // - style the imagedata element with an AlphaImageLoader filter
        //   with empty src
        var image = document.getElementById(node.id + "_image");
        if (!image) {
            image = this.createNode("olv:imagedata", node.id + "_image");
            node.appendChild(image);
        }
        image.style.width = width + "px";
        image.style.height = height + "px";
        image.src = style.externalGraphic;
        image.style.filter =
            "progid:DXImageTransform.Microsoft.AlphaImageLoader(" + 
            "src='', sizingMethod='scale')";

        var rot = rotation * Math.PI / 180;
        var sintheta = Math.sin(rot);
        var costheta = Math.cos(rot);

        // do the rotation on the image
        var filter =
            "progid:DXImageTransform.Microsoft.Matrix(M11=" + costheta +
            ",M12=" + (-sintheta) + ",M21=" + sintheta + ",M22=" + costheta +
            ",SizingMethod='auto expand')\n";

        // set the opacity (needed for the imagedata)
        var opacity = style.graphicOpacity || style.fillOpacity;
        if (opacity && opacity != 1) {
            filter += 
                "progid:DXImageTransform.Microsoft.BasicImage(opacity=" + 
                opacity+")\n";
        }
        node.style.filter = filter;

        // do the rotation again on a box, so we know the insertion point
        var centerPoint = new OpenLayers.Geometry.Point(-xOffset, -yOffset);
        var imgBox = new OpenLayers.Bounds(0, 0, width, height).toGeometry();
        imgBox.rotate(style.rotation, centerPoint);
        var imgBounds = imgBox.getBounds();

        node.style.left = Math.round(
            parseInt(node.style.left) + imgBounds.left) + "px";
        node.style.top = Math.round(
            parseInt(node.style.top) - imgBounds.bottom) + "px";
    },

    /**
     * Method: postDraw
     * Does some node postprocessing to work around browser issues:
     * - Some versions of Internet Explorer seem to be unable to set fillcolor
     *   and strokecolor to "none" correctly before the fill node is appended
     *   to a visible vml node. This method takes care of that and sets
     *   fillcolor and strokecolor again if needed.
     * - In some cases, a node won't become visible after being drawn. Setting
     *   style.visibility to "visible" works around that.
     * 
     * Parameters:
     * node - {DOMElement}
     */
    postDraw: function(node) {
        node.style.visibility = "visible";
        var fillColor = node._style.fillColor;
        var strokeColor = node._style.strokeColor;
        if (fillColor == "none" &&
                node.fillcolor != fillColor) {
            node.fillcolor = fillColor;
        }
        if (strokeColor == "none" &&
                node.strokecolor != strokeColor) {
            node.strokecolor = strokeColor;
        }
    },


    /**
     * Method: setNodeDimension
     * Get the geometry's bounds, convert it to our vml coordinate system, 
     * then set the node's position, size, and local coordinate system.
     *   
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     */
    setNodeDimension: function(node, geometry) {

        var bbox = geometry.getBounds();
        if(bbox) {
            var resolution = this.getResolution();
        
            var scaledBox = 
                new OpenLayers.Bounds(((bbox.left - this.featureDx)/resolution - this.offset.x) | 0,
                                      (bbox.bottom/resolution - this.offset.y) | 0,
                                      ((bbox.right - this.featureDx)/resolution - this.offset.x) | 0,
                                      (bbox.top/resolution - this.offset.y) | 0);
            
            // Set the internal coordinate system to draw the path
            node.style.left = scaledBox.left + "px";
            node.style.top = scaledBox.top + "px";
            node.style.width = scaledBox.getWidth() + "px";
            node.style.height = scaledBox.getHeight() + "px";
    
            node.coordorigin = scaledBox.left + " " + scaledBox.top;
            node.coordsize = scaledBox.getWidth()+ " " + scaledBox.getHeight();
        }
    },
    
    /** 
     * Method: dashStyle
     * 
     * Parameters:
     * style - {Object}
     * 
     * Returns:
     * {String} A VML compliant 'stroke-dasharray' value
     */
    dashStyle: function(style) {
        var dash = style.strokeDashstyle;
        switch (dash) {
            case 'solid':
            case 'dot':
            case 'dash':
            case 'dashdot':
            case 'longdash':
            case 'longdashdot':
                return dash;
            default:
                // very basic guessing of dash style patterns
                var parts = dash.split(/[ ,]/);
                if (parts.length == 2) {
                    if (1*parts[0] >= 2*parts[1]) {
                        return "longdash";
                    }
                    return (parts[0] == 1 || parts[1] == 1) ? "dot" : "dash";
                } else if (parts.length == 4) {
                    return (1*parts[0] >= 2*parts[1]) ? "longdashdot" :
                        "dashdot";
                }
                return "solid";
        }
    },

    /**
     * Method: createNode
     * Create a new node
     *
     * Parameters:
     * type - {String} Kind of node to draw
     * id - {String} Id for node
     *
     * Returns:
     * {DOMElement} A new node of the given type and id
     */
    createNode: function(type, id) {
        var node = document.createElement(type);
        if (id) {
            node.id = id;
        }
        
        // IE hack to make elements unselectable, to prevent 'blue flash'
        // while dragging vectors; #1410
        node.unselectable = 'on';
        node.onselectstart = OpenLayers.Function.False;
        
        return node;    
    },
    
    /**
     * Method: nodeTypeCompare
     * Determine whether a node is of a given type
     *
     * Parameters:
     * node - {DOMElement} An VML element
     * type - {String} Kind of node
     *
     * Returns:
     * {Boolean} Whether or not the specified node is of the specified type
     */
    nodeTypeCompare: function(node, type) {

        //split type
        var subType = type;
        var splitIndex = subType.indexOf(":");
        if (splitIndex != -1) {
            subType = subType.substr(splitIndex+1);
        }

        //split nodeName
        var nodeName = node.nodeName;
        splitIndex = nodeName.indexOf(":");
        if (splitIndex != -1) {
            nodeName = nodeName.substr(splitIndex+1);
        }

        return (subType == nodeName);
    },

    /**
     * Method: createRenderRoot
     * Create the renderer root
     *
     * Returns:
     * {DOMElement} The specific render engine's root element
     */
    createRenderRoot: function() {
        return this.nodeFactory(this.container.id + "_vmlRoot", "div");
    },

    /**
     * Method: createRoot
     * Create the main root element
     * 
     * Parameters:
     * suffix - {String} suffix to append to the id
     *
     * Returns:
     * {DOMElement}
     */
    createRoot: function(suffix) {
        return this.nodeFactory(this.container.id + suffix, "olv:group");
    },
    
    /**************************************
     *                                    *
     *     GEOMETRY DRAWING FUNCTIONS     *
     *                                    *
     **************************************/
    
    /**
     * Method: drawPoint
     * Render a point
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement} or false if the point could not be drawn
     */
    drawPoint: function(node, geometry) {
        return this.drawCircle(node, geometry, 1);
    },

    /**
     * Method: drawCircle
     * Render a circle.
     * Size and Center a circle given geometry (x,y center) and radius
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * radius - {float}
     * 
     * Returns:
     * {DOMElement} or false if the circle could not ne drawn
     */
    drawCircle: function(node, geometry, radius) {
        if(!isNaN(geometry.x)&& !isNaN(geometry.y)) {
            var resolution = this.getResolution();

            node.style.left = ((((geometry.x - this.featureDx) /resolution - this.offset.x) | 0) - radius) + "px";
            node.style.top = (((geometry.y /resolution - this.offset.y) | 0) - radius) + "px";
    
            var diameter = radius * 2;
            
            node.style.width = diameter + "px";
            node.style.height = diameter + "px";
            return node;
        }
        return false;
    },


    /**
     * Method: drawLineString
     * Render a linestring.
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement}
     */
    drawLineString: function(node, geometry) {
        return this.drawLine(node, geometry, false);
    },

    /**
     * Method: drawLinearRing
     * Render a linearring
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement}
     */
    drawLinearRing: function(node, geometry) {
        return this.drawLine(node, geometry, true);
    },

    /**
     * Method: DrawLine
     * Render a line.
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * closeLine - {Boolean} Close the line? (make it a ring?)
     * 
     * Returns:
     * {DOMElement}
     */
    drawLine: function(node, geometry, closeLine) {

        this.setNodeDimension(node, geometry);

        var resolution = this.getResolution();
        var numComponents = geometry.components.length;
        var parts = new Array(numComponents);

        var comp, x, y;
        for (var i = 0; i < numComponents; i++) {
            comp = geometry.components[i];
            x = ((comp.x - this.featureDx)/resolution - this.offset.x) | 0;
            y = (comp.y/resolution - this.offset.y) | 0;
            parts[i] = " " + x + "," + y + " l ";
        }
        var end = (closeLine) ? " x e" : " e";
        node.path = "m" + parts.join("") + end;
        return node;
    },

    /**
     * Method: drawPolygon
     * Render a polygon
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement}
     */
    drawPolygon: function(node, geometry) {
        this.setNodeDimension(node, geometry);

        var resolution = this.getResolution();
    
        var path = [];
        var j, jj, points, area, first, second, i, ii, comp, pathComp, x, y;
        for (j=0, jj=geometry.components.length; j<jj; j++) {
            path.push("m");
            points = geometry.components[j].components;
            // we only close paths of interior rings with area
            area = (j === 0);
            first = null;
            second = null;
            for (i=0, ii=points.length; i<ii; i++) {
                comp = points[i];
                x = ((comp.x - this.featureDx) / resolution - this.offset.x) | 0;
                y = (comp.y / resolution - this.offset.y) | 0;
                pathComp = " " + x + "," + y;
                path.push(pathComp);
                if (i==0) {
                    path.push(" l");
                }
                if (!area) {
                    // IE improperly renders sub-paths that have no area.
                    // Instead of checking the area of every ring, we confirm
                    // the ring has at least three distinct points.  This does
                    // not catch all non-zero area cases, but it greatly improves
                    // interior ring digitizing and is a minor performance hit
                    // when rendering rings with many points.
                    if (!first) {
                        first = pathComp;
                    } else if (first != pathComp) {
                        if (!second) {
                            second = pathComp;
                        } else if (second != pathComp) {
                            // stop looking
                            area = true;
                        }
                    }
                }
            }
            path.push(area ? " x " : " ");
        }
        path.push("e");
        node.path = path.join("");
        return node;
    },

    /**
     * Method: drawRectangle
     * Render a rectangle
     * 
     * Parameters:
     * node - {DOMElement}
     * geometry - {<OpenLayers.Geometry>}
     * 
     * Returns:
     * {DOMElement}
     */
    drawRectangle: function(node, geometry) {
        var resolution = this.getResolution();
    
        node.style.left = (((geometry.x - this.featureDx)/resolution - this.offset.x) | 0) + "px";
        node.style.top = ((geometry.y/resolution - this.offset.y) | 0) + "px";
        node.style.width = ((geometry.width/resolution) | 0) + "px";
        node.style.height = ((geometry.height/resolution) | 0) + "px";
        
        return node;
    },
    
    /**
     * Method: drawText
     * This method is only called by the renderer itself.
     * 
     * Parameters: 
     * featureId - {String}
     * style -
     * location - {<OpenLayers.Geometry.Point>}
     */
    drawText: function(featureId, style, location) {
        var label = this.nodeFactory(featureId + this.LABEL_ID_SUFFIX, "olv:rect");
        var textbox = this.nodeFactory(featureId + this.LABEL_ID_SUFFIX + "_textbox", "olv:textbox");
        
        var resolution = this.getResolution();
        label.style.left = (((location.x - this.featureDx)/resolution - this.offset.x) | 0) + "px";
        label.style.top = ((location.y/resolution - this.offset.y) | 0) + "px";
        label.style.flip = "y";

        textbox.innerText = style.label;

        if (style.cursor != "inherit" && style.cursor != null) {
            textbox.style.cursor = style.cursor;
        }
        if (style.fontColor) {
            textbox.style.color = style.fontColor;
        }
        if (style.fontOpacity) {
            textbox.style.filter = 'alpha(opacity=' + (style.fontOpacity * 100) + ')';
        }
        if (style.fontFamily) {
            textbox.style.fontFamily = style.fontFamily;
        }
        if (style.fontSize) {
            textbox.style.fontSize = style.fontSize;
        }
        if (style.fontWeight) {
            textbox.style.fontWeight = style.fontWeight;
        }
        if (style.fontStyle) {
            textbox.style.fontStyle = style.fontStyle;
        }
        if(style.labelSelect === true) {
            label._featureId = featureId;
            textbox._featureId = featureId;
            textbox._geometry = location;
            textbox._geometryClass = location.CLASS_NAME;
        }
        textbox.style.whiteSpace = "nowrap";
        // fun with IE: IE7 in standards compliant mode does not display any
        // text with a left inset of 0. So we set this to 1px and subtract one
        // pixel later when we set label.style.left
        textbox.inset = "1px,0px,0px,0px";

        if(!label.parentNode) {
            label.appendChild(textbox);
            this.textRoot.appendChild(label);
        }

        var align = style.labelAlign || "cm";
        if (align.length == 1) {
            align += "m";
        }
        var xshift = textbox.clientWidth *
            (OpenLayers.Renderer.VML.LABEL_SHIFT[align.substr(0,1)]);
        var yshift = textbox.clientHeight *
            (OpenLayers.Renderer.VML.LABEL_SHIFT[align.substr(1,1)]);
        label.style.left = parseInt(label.style.left)-xshift-1+"px";
        label.style.top = parseInt(label.style.top)+yshift+"px";
        
    },
    
    /**
     * Method: moveRoot
     * moves this renderer's root to a different renderer.
     * 
     * Parameters:
     * renderer - {<OpenLayers.Renderer>} target renderer for the moved root
     * root - {DOMElement} optional root node. To be used when this renderer
     *     holds roots from multiple layers to tell this method which one to
     *     detach
     * 
     * Returns:
     * {Boolean} true if successful, false otherwise
     */
    moveRoot: function(renderer) {
        var layer = this.map.getLayer(renderer.container.id);
        if(layer instanceof OpenLayers.Layer.Vector.RootContainer) {
            layer = this.map.getLayer(this.container.id);
        }
        layer && layer.renderer.clear();
        OpenLayers.Renderer.Elements.prototype.moveRoot.apply(this, arguments);
        layer && layer.redraw();
    },
    
    /**
     * Method: importSymbol
     * add a new symbol definition from the rendererer's symbol hash
     * 
     * Parameters:
     * graphicName - {String} name of the symbol to import
     * 
     * Returns:
     * {Object} - hash of {DOMElement} "symbol" and {Number} "size"
     */      
    importSymbol: function (graphicName)  {
        var id = this.container.id + "-" + graphicName;
        
        // check if symbol already exists in the cache
        var cache = this.symbolCache[id];
        if (cache) {
            return cache;
        }
        
        var symbol = OpenLayers.Renderer.symbol[graphicName];
        if (!symbol) {
            throw new Error(graphicName + ' is not a valid symbol name');
        }

        var symbolExtent = new OpenLayers.Bounds(
                                    Number.MAX_VALUE, Number.MAX_VALUE, 0, 0);
        
        var pathitems = ["m"];
        for (var i=0; i<symbol.length; i=i+2) {
            var x = symbol[i];
            var y = symbol[i+1];
            symbolExtent.left = Math.min(symbolExtent.left, x);
            symbolExtent.bottom = Math.min(symbolExtent.bottom, y);
            symbolExtent.right = Math.max(symbolExtent.right, x);
            symbolExtent.top = Math.max(symbolExtent.top, y);

            pathitems.push(x);
            pathitems.push(y);
            if (i == 0) {
                pathitems.push("l");
            }
        }
        pathitems.push("x e");
        var path = pathitems.join(" ");

        var diff = (symbolExtent.getWidth() - symbolExtent.getHeight()) / 2;
        if(diff > 0) {
            symbolExtent.bottom = symbolExtent.bottom - diff;
            symbolExtent.top = symbolExtent.top + diff;
        } else {
            symbolExtent.left = symbolExtent.left + diff;
            symbolExtent.right = symbolExtent.right - diff;
        }
        
        cache = {
            path: path,
            size: symbolExtent.getWidth(), // equals getHeight() now
            left: symbolExtent.left,
            bottom: symbolExtent.bottom
        };
        this.symbolCache[id] = cache;
        
        return cache;
    },
    
    CLASS_NAME: "OpenLayers.Renderer.VML"
});

/**
 * Constant: OpenLayers.Renderer.VML.LABEL_SHIFT
 * {Object}
 */
OpenLayers.Renderer.VML.LABEL_SHIFT = {
    "l": 0,
    "c": .5,
    "r": 1,
    "t": 0,
    "m": .5,
    "b": 1
};
/* ======================================================================
    OpenLayers/Control/CacheRead.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 */

/**
 * Class: OpenLayers.Control.CacheRead
 * A control for using image tiles cached with <OpenLayers.Control.CacheWrite>
 * from the browser's local storage.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.CacheRead = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: fetchEvent
     * {String} The layer event to listen to for replacing remote resource tile
     *     URLs with cached data URIs. Supported values are "tileerror" (try
     *     remote first, fall back to cached) and "tileloadstart" (try cache
     *     first, fall back to remote). Default is "tileloadstart".
     *
     *     Note that "tileerror" will not work for CORS enabled images (see
     *     https://developer.mozilla.org/en/CORS_Enabled_Image), i.e. layers
     *     configured with a <OpenLayers.Tile.Image.crossOriginKeyword> in
     *     <OpenLayers.Layer.Grid.tileOptions>.
     */
    fetchEvent: "tileloadstart",
    
    /**
     * APIProperty: layers
     * {Array(<OpenLayers.Layer.Grid>)}. Optional. If provided, only these
     *     layers will receive tiles from the cache.
     */
    layers: null,
    
    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /**
     * Constructor: OpenLayers.Control.CacheRead
     *
     * Parameters:
     * options - {Object} Object with API properties for this control
     */
    
    /** 
     * Method: setMap
     * Set the map property for the control. 
     * 
     * Parameters:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.prototype.setMap.apply(this, arguments);
        var i, layers = this.layers || map.layers;
        for (i=layers.length-1; i>=0; --i) {
            this.addLayer({layer: layers[i]});
        }
        if (!this.layers) {
            map.events.on({
                addlayer: this.addLayer,
                removeLayer: this.removeLayer,
                scope: this
            });
        }
    },
    
    /**
     * Method: addLayer
     * Adds a layer to the control. Once added, tiles requested for this layer
     *     will be cached.
     *
     * Parameters:
     * evt - {Object} Object with a layer property referencing an
     *     <OpenLayers.Layer> instance
     */
    addLayer: function(evt) {
        evt.layer.events.register(this.fetchEvent, this, this.fetch);        
    },
    
    /**
     * Method: removeLayer
     * Removes a layer from the control. Once removed, tiles requested for this
     *     layer will no longer be cached.
     *
     * Parameters:
     * evt - {Object} Object with a layer property referencing an
     *     <OpenLayers.Layer> instance
     */
    removeLayer: function(evt) {
        evt.layer.events.unregister(this.fetchEvent, this, this.fetch);
    },
    
    /**
     * Method: fetch
     * Listener to the <fetchEvent> event. Replaces a tile's url with a data
     * URI from the cache.
     *
     * Parameters:
     * evt - {Object} Event object with a tile property.
     */
    fetch: function(evt) {
        if (this.active && window.localStorage &&
                evt.tile instanceof OpenLayers.Tile.Image) {
            var tile = evt.tile,
                url = tile.url;
            // deal with modified tile urls when both CacheWrite and CacheRead
            // are active
            if (!tile.layer.crossOriginKeyword && OpenLayers.ProxyHost &&
                    url.indexOf(OpenLayers.ProxyHost) === 0) {
                url = OpenLayers.Control.CacheWrite.urlMap[url];        
            }
            var dataURI = window.localStorage.getItem("olCache_" + url);
            if (dataURI) {
                tile.url = dataURI;
                if (evt.type === "tileerror") {
                    tile.setImgSrc(dataURI);
                }
            }
        }
    },
    
    /**
     * Method: destroy
     * The destroy method is used to perform any clean up before the control
     * is dereferenced.  Typically this is where event listeners are removed
     * to prevent memory leaks.
     */
    destroy: function() {
        if (this.layers || this.map) {
            var i, layers = this.layers || this.map.layers;
            for (i=layers.length-1; i>=0; --i) {
                this.removeLayer({layer: layers[i]});
            }
        }
        if (this.map) {
            this.map.events.un({
                addlayer: this.addLayer,
                removeLayer: this.removeLayer,
                scope: this
            });
        }
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },
    
    CLASS_NAME: "OpenLayers.Control.CacheRead"
});
/* ======================================================================
    OpenLayers/Protocol/WFS/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol/WFS/v1.js
 * @requires OpenLayers/Format/WFST/v1_0_0.js
 */

/**
 * Class: OpenLayers.Protocol.WFS.v1_0_0
 * A WFS v1.0.0 protocol for vector layers.  Create a new instance with the
 *     <OpenLayers.Protocol.WFS.v1_0_0> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Protocol.WFS.v1>
 */
OpenLayers.Protocol.WFS.v1_0_0 = OpenLayers.Class(OpenLayers.Protocol.WFS.v1, {
    
    /**
     * Property: version
     * {String} WFS version number.
     */
    version: "1.0.0",
    
    /**
     * Constructor: OpenLayers.Protocol.WFS.v1_0_0
     * A class for giving layers WFS v1.0.0 protocol.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (optional).
     * featurePrefix - {String} Feature namespace alias (optional - only used
     *     if featureNS is provided).  Default is 'feature'.
     * geometryName - {String} Name of geometry attribute.  Default is 'the_geom'.
     */
   
    CLASS_NAME: "OpenLayers.Protocol.WFS.v1_0_0" 
});
/* ======================================================================
    OpenLayers/Format/WMSGetFeatureInfo.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 */

/**
 * Class: OpenLayers.Format.WMSGetFeatureInfo
 * Class to read GetFeatureInfo responses from Web Mapping Services
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.WMSGetFeatureInfo = OpenLayers.Class(OpenLayers.Format.XML, {

    /**
     * APIProperty: layerIdentifier
     * {String} All xml nodes containing this search criteria will populate an
     *     internal array of layer nodes.
     */ 
    layerIdentifier: '_layer',

    /**
     * APIProperty: featureIdentifier
     * {String} All xml nodes containing this search criteria will populate an 
     *     internal array of feature nodes for each layer node found.
     */
    featureIdentifier: '_feature',

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Property: gmlFormat
     * {<OpenLayers.Format.GML>} internal GML format for parsing geometries
     *     in msGMLOutput
     */
    gmlFormat: null,

    /**
     * Constructor: OpenLayers.Format.WMSGetFeatureInfo
     * Create a new parser for WMS GetFeatureInfo responses
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Read WMS GetFeatureInfo data from a string, and return an array of features
     *
     * Parameters:
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} An array of features.
     */
    read: function(data) {
        var result;
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        var root = data.documentElement;
        if(root) {
            var scope = this;
            var read = this["read_" + root.nodeName];
            if(read) {
                result = read.call(this, root);
            } else {
                // fall-back to GML since this is a common output format for WMS
                // GetFeatureInfo responses
                result = new OpenLayers.Format.GML((this.options ? this.options : {})).read(data);
            }
        } else {
            result = data;
        }
        return result;
    },
    
    
    /**
     * Method: read_msGMLOutput
     * Parse msGMLOutput nodes.
     *
     * Parameters:
     * data - {DOMElement}
     *
     * Returns:
     * {Array}
     */
    read_msGMLOutput: function(data) {
        var response = [];
        var layerNodes = this.getSiblingNodesByTagCriteria(data,
            this.layerIdentifier);
        if (layerNodes) {
            for (var i=0, len=layerNodes.length; i<len; ++i) {
                var node = layerNodes[i];
                var layerName = node.nodeName;
                if (node.prefix) {
                    layerName = layerName.split(':')[1];
                }
                var layerName = layerName.replace(this.layerIdentifier, '');
                var featureNodes = this.getSiblingNodesByTagCriteria(node, 
                    this.featureIdentifier);
                if (featureNodes) {
                    for (var j = 0; j < featureNodes.length; j++) {
                        var featureNode = featureNodes[j];
                        var geomInfo = this.parseGeometry(featureNode);
                        var attributes = this.parseAttributes(featureNode);
                        var feature = new OpenLayers.Feature.Vector(geomInfo.geometry, 
                            attributes, null);
                        feature.bounds = geomInfo.bounds;
                        feature.type = layerName;
                        response.push(feature);
                    }
                }
            }
        }
        return response;
    },
    
    /**
     * Method: read_FeatureInfoResponse
     * Parse FeatureInfoResponse nodes.
     *
     * Parameters:
     * data - {DOMElement}
     *
     * Returns:
     * {Array}
     */
    read_FeatureInfoResponse: function(data) {
        var response = [];
        var featureNodes = this.getElementsByTagNameNS(data, '*',
            'FIELDS');

        for(var i=0, len=featureNodes.length;i<len;i++) {
            var featureNode = featureNodes[i];
            var geom = null;

            // attributes can be actual attributes on the FIELDS tag, 
            // or FIELD children
            var attributes = {};
            var j;
            var jlen = featureNode.attributes.length;
            if (jlen > 0) {
                for(j=0; j<jlen; j++) {
                    var attribute = featureNode.attributes[j];
                    attributes[attribute.nodeName] = attribute.nodeValue;
                }
            } else {
                var nodes = featureNode.childNodes;
                for (j=0, jlen=nodes.length; j<jlen; ++j) {
                    var node = nodes[j];
                    if (node.nodeType != 3) {
                        attributes[node.getAttribute("name")] = 
                            node.getAttribute("value");
                    }
                }
            }

            response.push(
                new OpenLayers.Feature.Vector(geom, attributes, null)
            );
        }
        return response;
    },

    /**
     * Method: getSiblingNodesByTagCriteria
     * Recursively searches passed xml node and all it's descendant levels for 
     *     nodes whose tagName contains the passed search string. This returns an 
     *     array of all sibling nodes which match the criteria from the highest 
     *     hierarchial level from which a match is found.
     * 
     * Parameters:
     * node - {DOMElement} An xml node
     * criteria - {String} Search string which will match some part of a tagName 
     *                                       
     * Returns:
     * Array({DOMElement}) An array of sibling xml nodes
     */                
    getSiblingNodesByTagCriteria: function(node, criteria){
        var nodes = [];
        var children, tagName, n, matchNodes, child;
        if (node && node.hasChildNodes()) {
            children = node.childNodes;
            n = children.length;

            for(var k=0; k<n; k++){
                child = children[k];
                while (child && child.nodeType != 1) {
                    child = child.nextSibling;
                    k++;
                }
                tagName = (child ? child.nodeName : '');
                if (tagName.length > 0 && tagName.indexOf(criteria) > -1) {
                    nodes.push(child);
                } else {
                    matchNodes = this.getSiblingNodesByTagCriteria(
                        child, criteria);

                    if(matchNodes.length > 0){
                        (nodes.length == 0) ? 
                            nodes = matchNodes : nodes.push(matchNodes);
                    }
                }
            }

        }
        return nodes;
    },

    /**
     * Method: parseAttributes
     *
     * Parameters:
     * node - {<DOMElement>}
     *
     * Returns:
     * {Object} An attributes object.
     * 
     * Notes:
     * Assumes that attributes are direct child xml nodes of the passed node
     * and contain only a single text node. 
     */    
    parseAttributes: function(node){
        var attributes = {};
        if (node.nodeType == 1) {
            var children = node.childNodes;
            var n = children.length;
            for (var i = 0; i < n; ++i) {
                var child = children[i];
                if (child.nodeType == 1) {
                    var grandchildren = child.childNodes;
                    var name = (child.prefix) ?
                        child.nodeName.split(":")[1] : child.nodeName;
                    if (grandchildren.length == 0) {
                        attributes[name] = null;
                    } else if (grandchildren.length == 1) {
                        var grandchild = grandchildren[0];
                        if (grandchild.nodeType == 3 ||
                            grandchild.nodeType == 4) {
                            var value = grandchild.nodeValue.replace(
                                this.regExes.trimSpace, "");
                            attributes[name] = value;
                        }
                    }
                }
            }
        }
        return attributes;
    },

    /**
     * Method: parseGeometry
     * Parse the geometry and the feature bounds out of the node using 
     *     Format.GML
     *
     * Parameters:
     * node - {<DOMElement>}
     *
     * Returns:
     * {Object} An object containing the geometry and the feature bounds
    */
    parseGeometry: function(node) {
        // we need to use the old Format.GML parser since we do not know the 
        // geometry name
        if (!this.gmlFormat) {
            this.gmlFormat = new OpenLayers.Format.GML();
        }
        var feature = this.gmlFormat.parseFeature(node);
        var geometry, bounds = null;
        if (feature) {
            geometry = feature.geometry && feature.geometry.clone();
            bounds = feature.bounds && feature.bounds.clone();
            feature.destroy();
        }
        return {geometry: geometry, bounds: bounds};
    },

    CLASS_NAME: "OpenLayers.Format.WMSGetFeatureInfo"
    
});
/* ======================================================================
    OpenLayers/Control/WMTSGetFeatureInfo.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Click.js
 * @requires OpenLayers/Handler/Hover.js
 * @requires OpenLayers/Request.js
 * @requires OpenLayers/Format/WMSGetFeatureInfo.js
 */

/**
 * Class: OpenLayers.Control.WMTSGetFeatureInfo
 * The WMTSGetFeatureInfo control uses a WMTS query to get information about a 
 *     point on the map.  The information may be in a display-friendly format 
 *     such as HTML, or a machine-friendly format such as GML, depending on the 
 *     server's capabilities and the client's configuration.  This control 
 *     handles click or hover events, attempts to parse the results using an 
 *     OpenLayers.Format, and fires a 'getfeatureinfo' event for each layer
 *     queried.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.WMTSGetFeatureInfo = OpenLayers.Class(OpenLayers.Control, {

   /**
     * APIProperty: hover
     * {Boolean} Send GetFeatureInfo requests when mouse stops moving.
     *     Default is false.
     */
    hover: false,
    
    /**
     * Property: requestEncoding
     * {String} One of "KVP" or "REST".  Only KVP encoding is supported at this 
     *     time.
     */
    requestEncoding: "KVP",

    /**
     * APIProperty: drillDown
     * {Boolean} Drill down over all WMTS layers in the map. When
     *     using drillDown mode, hover is not possible.  A getfeatureinfo event
     *     will be fired for each layer queried.
     */
    drillDown: false,

    /**
     * APIProperty: maxFeatures
     * {Integer} Maximum number of features to return from a WMTS query. This
     *     sets the feature_count parameter on WMTS GetFeatureInfo
     *     requests.
     */
    maxFeatures: 10,

    /** APIProperty: clickCallback
     *  {String} The click callback to register in the
     *      {<OpenLayers.Handler.Click>} object created when the hover
     *      option is set to false. Default is "click".
     */
    clickCallback: "click",
    
    /**
     * Property: layers
     * {Array(<OpenLayers.Layer.WMTS>)} The layers to query for feature info.
     *     If omitted, all map WMTS layers will be considered.
     */
    layers: null,

    /**
     * APIProperty: queryVisible
     * {Boolean} Filter out hidden layers when searching the map for layers to 
     *     query.  Default is true.
     */
    queryVisible: true,

    /**
     * Property: infoFormat
     * {String} The mimetype to request from the server
     */
    infoFormat: 'text/html',
    
    /**
     * Property: vendorParams
     * {Object} Additional parameters that will be added to the request, for
     * WMTS implementations that support them. This could e.g. look like
     * (start code)
     * {
     *     radius: 5
     * }
     * (end)
     */
    vendorParams: {},
    
    /**
     * Property: format
     * {<OpenLayers.Format>} A format for parsing GetFeatureInfo responses.
     *     Default is <OpenLayers.Format.WMSGetFeatureInfo>.
     */
    format: null,
    
    /**
     * Property: formatOptions
     * {Object} Optional properties to set on the format (if one is not provided
     *     in the <format> property.
     */
    formatOptions: null,

    /**
     * APIProperty: handlerOptions
     * {Object} Additional options for the handlers used by this control, e.g.
     * (start code)
     * {
     *     "click": {delay: 100},
     *     "hover": {delay: 300}
     * }
     * (end)
     */
    handlerOptions: null,
    
    /**
     * Property: handler
     * {Object} Reference to the <OpenLayers.Handler> for this control
     */
    handler: null,
    
    /**
     * Property: hoverRequest
     * {<OpenLayers.Request>} contains the currently running hover request
     *     (if any).
     */
    hoverRequest: null,
    
    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforegetfeatureinfo - Triggered before each request is sent.
     *      The event object has an *xy* property with the position of the 
     *      mouse click or hover event that triggers the request and a *layer*
     *      property referencing the layer about to be queried.  If a listener
     *      returns false, the request will not be issued.
     * getfeatureinfo - Triggered when a GetFeatureInfo response is received.
     *      The event object has a *text* property with the body of the
     *      response (String), a *features* property with an array of the
     *      parsed features, an *xy* property with the position of the mouse
     *      click or hover event that triggered the request, a *layer* property
     *      referencing the layer queried and a *request* property with the 
     *      request itself. If drillDown is set to true, one event will be fired
     *      for each layer queried.
     * exception - Triggered when a GetFeatureInfo request fails (with a 
     *      status other than 200) or whenparsing fails.  Listeners will receive 
     *      an event with *request*, *xy*, and *layer*  properties.  In the case 
     *      of a parsing error, the event will also contain an *error* property.
     */
    
    /** 
     * Property: pending
     * {Number}  The number of pending requests.
     */
    pending: 0,

    /**
     * Constructor: <OpenLayers.Control.WMTSGetFeatureInfo>
     *
     * Parameters:
     * options - {Object} 
     */
    initialize: function(options) {
        options = options || {};
        options.handlerOptions = options.handlerOptions || {};

        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        
        if (!this.format) {
            this.format = new OpenLayers.Format.WMSGetFeatureInfo(
                options.formatOptions
            );
        }
        
        if (this.drillDown === true) {
            this.hover = false;
        }

        if (this.hover) {
            this.handler = new OpenLayers.Handler.Hover(
                this, {
                    move: this.cancelHover,
                    pause: this.getInfoForHover
                },
                OpenLayers.Util.extend(
                    this.handlerOptions.hover || {}, {delay: 250}
                )
            );
        } else {
            var callbacks = {};
            callbacks[this.clickCallback] = this.getInfoForClick;
            this.handler = new OpenLayers.Handler.Click(
                this, callbacks, this.handlerOptions.click || {}
            );
        }
    },

    /**
     * Method: getInfoForClick 
     * Called on click
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    getInfoForClick: function(evt) {
        this.request(evt.xy, {});
    },
   
    /**
     * Method: getInfoForHover
     * Pause callback for the hover handler
     *
     * Parameters:
     * evt - {Object}
     */
    getInfoForHover: function(evt) {
        this.request(evt.xy, {hover: true});
    },

    /**
     * Method: cancelHover
     * Cancel callback for the hover handler
     */
    cancelHover: function() {
        if (this.hoverRequest) {
            --this.pending;
            if (this.pending <= 0) {
                OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
                this.pending = 0;
            }            
            this.hoverRequest.abort();
            this.hoverRequest = null;
        }
    },

    /**
     * Method: findLayers
     * Internal method to get the layers, independent of whether we are
     *     inspecting the map or using a client-provided array
     */
    findLayers: function() {
        var candidates = this.layers || this.map.layers;
        var layers = [];
        var layer;
        for (var i=candidates.length-1; i>=0; --i) {
            layer = candidates[i];
            if (layer instanceof OpenLayers.Layer.WMTS &&
                layer.requestEncoding === this.requestEncoding &&
                (!this.queryVisible || layer.getVisibility())) {
                layers.push(layer);
                if (!this.drillDown || this.hover) {
                    break;
                }
            }
        }
        return layers;
    },
    
    /**
     * Method: buildRequestOptions
     * Build an object with the relevant options for the GetFeatureInfo request.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.WMTS>} A WMTS layer.
     * xy - {<OpenLayers.Pixel>} The position on the map where the 
     *     mouse event occurred.
     */
    buildRequestOptions: function(layer, xy) {
        var loc = this.map.getLonLatFromPixel(xy);
        var getTileUrl = layer.getURL(
            new OpenLayers.Bounds(loc.lon, loc.lat, loc.lon, loc.lat)
        );
        var params = OpenLayers.Util.getParameters(getTileUrl);
        var tileInfo = layer.getTileInfo(loc);
        OpenLayers.Util.extend(params, {
            service: "WMTS",
            version: layer.version,
            request: "GetFeatureInfo",
            infoFormat: this.infoFormat,
            i: tileInfo.i,
            j: tileInfo.j
        });
        OpenLayers.Util.applyDefaults(params, this.vendorParams);
        return {
            url: OpenLayers.Util.isArray(layer.url) ? layer.url[0] : layer.url,
            params: OpenLayers.Util.upperCaseObject(params),
            callback: function(request) {
                this.handleResponse(xy, request, layer);
            },
            scope: this
        };
    },

    /**
     * Method: request
     * Sends a GetFeatureInfo request to the WMTS
     * 
     * Parameters:
     * xy - {<OpenLayers.Pixel>} The position on the map where the mouse event 
     *     occurred.
     * options - {Object} additional options for this method.
     * 
     * Valid options:
     * - *hover* {Boolean} true if we do the request for the hover handler
     */
    request: function(xy, options) {
        options = options || {};
        var layers = this.findLayers();
        if (layers.length > 0) {
            var issue, layer;
            for (var i=0, len=layers.length; i<len; i++) {
                layer = layers[i];
                issue = this.events.triggerEvent("beforegetfeatureinfo", {
                    xy: xy,
                    layer: layer
                });
                if (issue !== false) {
                    ++this.pending;
                    var requestOptions = this.buildRequestOptions(layer, xy);
                    var request = OpenLayers.Request.GET(requestOptions);
                    if (options.hover === true) {
                        this.hoverRequest = request;
                    }
                }
            }
            if (this.pending > 0) {
                OpenLayers.Element.addClass(this.map.viewPortDiv, "olCursorWait");
            }
        }
    },

    /**
     * Method: handleResponse
     * Handler for the GetFeatureInfo response.
     * 
     * Parameters:
     * xy - {<OpenLayers.Pixel>} The position on the map where the mouse event 
     *     occurred.
     * request - {XMLHttpRequest} The request object.
     * layer - {<OpenLayers.Layer.WMTS>} The queried layer.
     */
    handleResponse: function(xy, request, layer) {
        --this.pending;
        if (this.pending <= 0) {
            OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
            this.pending = 0;
        }
        if (request.status && (request.status < 200 || request.status >= 300)) {
            this.events.triggerEvent("exception", {
                xy: xy, 
                request: request,
                layer: layer
            });
        } else {
            var doc = request.responseXML;
            if (!doc || !doc.documentElement) {
                doc = request.responseText;
            }
            var features, except;
            try {
                features = this.format.read(doc);
            } catch (error) {
                except = true;
                this.events.triggerEvent("exception", {
                    xy: xy,
                    request: request,
                    error: error,
                    layer: layer
                });
            }
            if (!except) {
                this.events.triggerEvent("getfeatureinfo", {
                    text: request.responseText,
                    features: features,
                    request: request,
                    xy: xy,
                    layer: layer
                });
            }
        }
    },

    CLASS_NAME: "OpenLayers.Control.WMTSGetFeatureInfo"
});
/* ======================================================================
    OpenLayers/Strategy/Paging.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Strategy.js
 */

/**
 * Class: OpenLayers.Strategy.Paging
 * Strategy for vector feature paging
 *
 * Inherits from:
 *  - <OpenLayers.Strategy>
 */
OpenLayers.Strategy.Paging = OpenLayers.Class(OpenLayers.Strategy, {
    
    /**
     * Property: features
     * {Array(<OpenLayers.Feature.Vector>)} Cached features.
     */
    features: null,
    
    /**
     * Property: length
     * {Integer} Number of features per page.  Default is 10.
     */
    length: 10,
    
    /**
     * Property: num
     * {Integer} The currently displayed page number.
     */
    num: null,
    
    /**
     * Property: paging
     * {Boolean} The strategy is currently changing pages.
     */
    paging: false,

    /**
     * Constructor: OpenLayers.Strategy.Paging
     * Create a new paging strategy.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    
    /**
     * APIMethod: activate
     * Activate the strategy.  Register any listeners, do appropriate setup.
     * 
     * Returns:
     * {Boolean} The strategy was successfully activated.
     */
    activate: function() {
        var activated = OpenLayers.Strategy.prototype.activate.call(this);
        if(activated) {
            this.layer.events.on({
                "beforefeaturesadded": this.cacheFeatures,
                scope: this
            });
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the strategy.  Unregister any listeners, do appropriate
     *     tear-down.
     * 
     * Returns:
     * {Boolean} The strategy was successfully deactivated.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this);
        if(deactivated) {
            this.clearCache();
            this.layer.events.un({
                "beforefeaturesadded": this.cacheFeatures,
                scope: this
            });
        }
        return deactivated;
    },
    
    /**
     * Method: cacheFeatures
     * Cache features before they are added to the layer.
     *
     * Parameters:
     * event - {Object} The event that this was listening for.  This will come
     *     with a batch of features to be paged.
     */
    cacheFeatures: function(event) {
        if(!this.paging) {
            this.clearCache();
            this.features = event.features;
            this.pageNext(event);
        }
    },
    
    /**
     * Method: clearCache
     * Clear out the cached features.  This destroys features, assuming
     *     nothing else has a reference.
     */
    clearCache: function() {
        if(this.features) {
            for(var i=0; i<this.features.length; ++i) {
                this.features[i].destroy();
            }
        }
        this.features = null;
        this.num = null;
    },
    
    /**
     * APIMethod: pageCount
     * Get the total count of pages given the current cache of features.
     *
     * Returns:
     * {Integer} The page count.
     */
    pageCount: function() {
        var numFeatures = this.features ? this.features.length : 0;
        return Math.ceil(numFeatures / this.length);
    },

    /**
     * APIMethod: pageNum
     * Get the zero based page number.
     *
     * Returns:
     * {Integer} The current page number being displayed.
     */
    pageNum: function() {
        return this.num;
    },

    /**
     * APIMethod: pageLength
     * Gets or sets page length.
     *
     * Parameters:
     * newLength - {Integer} Optional length to be set.
     *
     * Returns:
     * {Integer} The length of a page (number of features per page).
     */
    pageLength: function(newLength) {
        if(newLength && newLength > 0) {
            this.length = newLength;
        }
        return this.length;
    },

    /**
     * APIMethod: pageNext
     * Display the next page of features.
     *
     * Returns:
     * {Boolean} A new page was displayed.
     */
    pageNext: function(event) {
        var changed = false;
        if(this.features) {
            if(this.num === null) {
                this.num = -1;
            }
            var start = (this.num + 1) * this.length;
            changed = this.page(start, event);
        }
        return changed;
    },

    /**
     * APIMethod: pagePrevious
     * Display the previous page of features.
     *
     * Returns:
     * {Boolean} A new page was displayed.
     */
    pagePrevious: function() {
        var changed = false;
        if(this.features) {
            if(this.num === null) {
                this.num = this.pageCount();
            }
            var start = (this.num - 1) * this.length;
            changed = this.page(start);
        }
        return changed;
    },
    
    /**
     * Method: page
     * Display the page starting at the given index from the cache.
     *
     * Returns:
     * {Boolean} A new page was displayed.
     */
    page: function(start, event) {
        var changed = false;
        if(this.features) {
            if(start >= 0 && start < this.features.length) {
                var num = Math.floor(start / this.length);
                if(num != this.num) {
                    this.paging = true;
                    var features = this.features.slice(start, start + this.length);
                    this.layer.removeFeatures(this.layer.features);
                    this.num = num;
                    // modify the event if any
                    if(event && event.features) {
                        // this.was called by an event listener
                        event.features = features;
                    } else {
                        // this was called directly on the strategy
                        this.layer.addFeatures(features);
                    }
                    this.paging = false;
                    changed = true;
                }
            }
        }
        return changed;
    },
    
    CLASS_NAME: "OpenLayers.Strategy.Paging" 
});
/* ======================================================================
    OpenLayers/Protocol/CSW/v2_0_2.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol/CSW.js
 * @requires OpenLayers/Format/CSWGetRecords/v2_0_2.js
 */

/**
 * Class: OpenLayers.Protocol.CSW.v2_0_2
 * CS-W (Catalogue services for the Web) version 2.0.2 protocol.
 *
 * Inherits from:
 *  - <OpenLayers.Protocol>
 */
OpenLayers.Protocol.CSW.v2_0_2 = OpenLayers.Class(OpenLayers.Protocol, {

    /**
     * Property: formatOptions
     * {Object} Optional options for the format.  If a format is not provided,
     *     this property can be used to extend the default format options.
     */
    formatOptions: null,

    /**
     * Constructor: OpenLayers.Protocol.CSW.v2_0_2
     * A class for CSW version 2.0.2 protocol management.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     */
    initialize: function(options) {
        OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
        if(!options.format) {
            this.format = new OpenLayers.Format.CSWGetRecords.v2_0_2(OpenLayers.Util.extend({
            }, this.formatOptions));
        }
    },

    /**
     * APIMethod: destroy
     * Clean up the protocol.
     */
    destroy: function() {
        if(this.options && !this.options.format) {
            this.format.destroy();
        }
        this.format = null;
        OpenLayers.Protocol.prototype.destroy.apply(this);
    },

    /**
     * Method: read
     * Construct a request for reading new records from the Catalogue.
     */
    read: function(options) {
        options = OpenLayers.Util.extend({}, options);
        OpenLayers.Util.applyDefaults(options, this.options || {});
        var response = new OpenLayers.Protocol.Response({requestType: "read"});

        var data = this.format.write(options.params);

        response.priv = OpenLayers.Request.POST({
            url: options.url,
            callback: this.createCallback(this.handleRead, response, options),
            params: options.params,
            headers: options.headers,
            data: data
        });

        return response;
    },

    /**
     * Method: handleRead
     * Deal with response from the read request.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object to pass
     *     to the user callback.
     *     This response is given a code property, and optionally a data property.
     *     The latter represents the CSW records as returned by the call to
     *     the CSW format read method.
     * options - {Object} The user options passed to the read call.
     */
    handleRead: function(response, options) {
        if(options.callback) {
            var request = response.priv;
            if(request.status >= 200 && request.status < 300) {
                // success
                response.data = this.parseData(request);
                response.code = OpenLayers.Protocol.Response.SUCCESS;
            } else {
                // failure
                response.code = OpenLayers.Protocol.Response.FAILURE;
            }
            options.callback.call(options.scope, response);
        }
    },

    /**
     * Method: parseData
     * Read HTTP response body and return records
     *
     * Parameters:
     * request - {XMLHttpRequest} The request object
     *
     * Returns:
     * {Object} The CSW records as returned by the call to the format read method.
     */
    parseData: function(request) {
        var doc = request.responseXML;
        if(!doc || !doc.documentElement) {
            doc = request.responseText;
        }
        if(!doc || doc.length <= 0) {
            return null;
        }
        return this.format.read(doc);
    },

    CLASS_NAME: "OpenLayers.Protocol.CSW.v2_0_2"

});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1_1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities/v1.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities.v1_1
 * Abstract class not to be instantiated directly.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMSCapabilities.v1>
 */
OpenLayers.Format.WMSCapabilities.v1_1 = OpenLayers.Class(
    OpenLayers.Format.WMSCapabilities.v1, {
    
    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wms": OpenLayers.Util.applyDefaults({
            "WMT_MS_Capabilities": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Keyword": function(node, obj) {
                if (obj.keywords) {
                    obj.keywords.push(this.getChildValue(node));
                }
            },
            "DescribeLayer": function(node, obj) {
                obj.describelayer = {formats: []};
                this.readChildNodes(node, obj.describelayer);
            },
            "GetLegendGraphic": function(node, obj) {
                obj.getlegendgraphic = {formats: []};
                this.readChildNodes(node, obj.getlegendgraphic);
            },
            "GetStyles": function(node, obj) {
                obj.getstyles = {formats: []};
                this.readChildNodes(node, obj.getstyles);
            },
            "PutStyles": function(node, obj) {
                obj.putstyles = {formats: []};
                this.readChildNodes(node, obj.putstyles);
            },
            "UserDefinedSymbolization": function(node, obj) {
                var userSymbols = {
                    supportSLD: parseInt(node.getAttribute("SupportSLD")) == 1,
                    userLayer: parseInt(node.getAttribute("UserLayer")) == 1,
                    userStyle: parseInt(node.getAttribute("UserStyle")) == 1,
                    remoteWFS: parseInt(node.getAttribute("RemoteWFS")) == 1
                };
                obj.userSymbols = userSymbols;
            },
            "LatLonBoundingBox": function(node, obj) {
                obj.llbbox = [
                    parseFloat(node.getAttribute("minx")),
                    parseFloat(node.getAttribute("miny")),
                    parseFloat(node.getAttribute("maxx")),
                    parseFloat(node.getAttribute("maxy"))
                ];
            },
            "BoundingBox": function(node, obj) {
                var bbox = OpenLayers.Format.WMSCapabilities.v1.prototype.readers["wms"].BoundingBox.apply(this, [node, obj]);
                bbox.srs  = node.getAttribute("SRS");
                obj.bbox[bbox.srs] = bbox;
            },
            "ScaleHint": function(node, obj) {
                var min = node.getAttribute("min");
                var max = node.getAttribute("max");
                var rad2 = Math.pow(2, 0.5);
                var ipm = OpenLayers.INCHES_PER_UNIT["m"];
                obj.maxScale = parseFloat(
                    ((min / rad2) * ipm * 
                        OpenLayers.DOTS_PER_INCH).toPrecision(13)
                );
                obj.minScale = parseFloat(
                    ((max / rad2) * ipm * 
                        OpenLayers.DOTS_PER_INCH).toPrecision(13)
                );
            },
            "Dimension": function(node, obj) {
                var name = node.getAttribute("name").toLowerCase();
                var dim = {
                    name: name,
                    units: node.getAttribute("units"),
                    unitsymbol: node.getAttribute("unitSymbol")
                };
                obj.dimensions[dim.name] = dim;
            },
            "Extent": function(node, obj) {
                var name = node.getAttribute("name").toLowerCase();
                if (name in obj["dimensions"]) {
                    var extent = obj.dimensions[name];
                    extent.nearestVal = 
                        node.getAttribute("nearestValue") === "1";
                    extent.multipleVal = 
                        node.getAttribute("multipleValues") === "1";
                    extent.current = node.getAttribute("current") === "1";
                    extent["default"] = node.getAttribute("default") || "";
                    var values = this.getChildValue(node);
                    extent.values = values.split(",");
                }
                }
        }, OpenLayers.Format.WMSCapabilities.v1.prototype.readers["wms"])
    },

    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_1" 

});
/* ======================================================================
    OpenLayers/Control/Graticule.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Lang.js
 * @requires OpenLayers/Rule.js
 * @requires OpenLayers/StyleMap.js
 * @requires OpenLayers/Layer/Vector.js
 */

/**
 * Class: OpenLayers.Control.Graticule
 * The Graticule displays a grid of latitude/longitude lines reprojected on
 * the map.  
 * 
 * Inherits from:
 *  - <OpenLayers.Control>
 *  
 */
OpenLayers.Control.Graticule = OpenLayers.Class(OpenLayers.Control, {

    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map. Default is
     *     true. 
     */
    autoActivate: true,
    
    /**
    * APIProperty: intervals
    * {Array(Float)} A list of possible graticule widths in degrees.
    */
    intervals: [ 45, 30, 20, 10, 5, 2, 1,
                 0.5, 0.2, 0.1, 0.05, 0.01, 
                 0.005, 0.002, 0.001 ],

    /**
     * APIProperty: displayInLayerSwitcher
     * {Boolean} Allows the Graticule control to be switched on and off by 
     *     LayerSwitcher control. Defaults is true.
     */
    displayInLayerSwitcher: true,

    /**
     * APIProperty: visible
     * {Boolean} should the graticule be initially visible (default=true)
     */
    visible: true,

    /**
     * APIProperty: numPoints
     * {Integer} The number of points to use in each graticule line.  Higher
     * numbers result in a smoother curve for projected maps 
     */
    numPoints: 50,

    /**
     * APIProperty: targetSize
     * {Integer} The maximum size of the grid in pixels on the map
     */
    targetSize: 200,

    /**
     * APIProperty: layerName
     * {String} The name to be displayed in the layer switcher, default is set 
     *     by {<OpenLayers.Lang>}.
     */
    layerName: null,

    /**
     * APIProperty: labelled
     * {Boolean} Should the graticule lines be labelled?. default=true
     */
    labelled: true,

    /**
     * APIProperty: labelFormat
     * {String} the format of the labels, default = 'dm'. See
     * <OpenLayers.Util.getFormattedLonLat> for other options.
     */
    labelFormat: 'dm',

    /**
     * APIProperty: lineSymbolizer
     * {symbolizer} the symbolizer used to render lines
     */
    lineSymbolizer: {
                strokeColor: "#333",
                strokeWidth: 1,
                strokeOpacity: 0.5
            },

    /**
     * APIProperty: labelSymbolizer
     * {symbolizer} the symbolizer used to render labels
     */
     labelSymbolizer: {},

    /**
     * Property: gratLayer
     * {<OpenLayers.Layer.Vector>} vector layer used to draw the graticule on
     */
    gratLayer: null,

    /**
     * Constructor: OpenLayers.Control.Graticule
     * Create a new graticule control to display a grid of latitude longitude
     * lines.
     * 
     * Parameters:
     * options - {Object} An optional object whose properties will be used
     *     to extend the control.
     */
    initialize: function(options) {
        options = options || {};
        options.layerName = options.layerName || OpenLayers.i18n("Graticule");
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        
        this.labelSymbolizer.stroke = false;
        this.labelSymbolizer.fill = false;
        this.labelSymbolizer.label = "${label}";
        this.labelSymbolizer.labelAlign = "${labelAlign}";
        this.labelSymbolizer.labelXOffset = "${xOffset}";
        this.labelSymbolizer.labelYOffset = "${yOffset}";
    },

    /**
     * APIMethod: destroy
     */
    destroy: function() {
        this.deactivate();        
        OpenLayers.Control.prototype.destroy.apply(this, arguments);        
        if (this.gratLayer) {
            this.gratLayer.destroy();
            this.gratLayer = null;
        }
    },
    
    /**
     * Method: draw
     *
     * initializes the graticule layer and does the initial update
     * 
     * Returns:
     * {DOMElement}
     */
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this, arguments);
        if (!this.gratLayer) {
            var gratStyle = new OpenLayers.Style({},{
                rules: [new OpenLayers.Rule({'symbolizer':
                    {"Point":this.labelSymbolizer,
                     "Line":this.lineSymbolizer}
                })]
            });
            this.gratLayer = new OpenLayers.Layer.Vector(this.layerName, {
                styleMap: new OpenLayers.StyleMap({'default':gratStyle}),
                visibility: this.visible,
                displayInLayerSwitcher: this.displayInLayerSwitcher
            });
        }
        return this.div;
    },

     /**
     * APIMethod: activate
     */
    activate: function() {
        if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
            this.map.addLayer(this.gratLayer);
            this.map.events.register('moveend', this, this.update);     
            this.update();
            return true;            
        } else {
            return false;
        }
    },
    
    /**
     * APIMethod: deactivate
     */
    deactivate: function() {
        if (OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
            this.map.events.unregister('moveend', this, this.update);
            this.map.removeLayer(this.gratLayer);
            return true;
        } else {
            return false;
        }
    },
    /**
     * Method: update
     *
     * calculates the grid to be displayed and actually draws it
     * 
     * Returns:
     * {DOMElement}
     */
    update: function() {
        //wait for the map to be initialized before proceeding
        var mapBounds = this.map.getExtent();
        if (!mapBounds) {
            return;
        }
        
        //clear out the old grid
        this.gratLayer.destroyFeatures();
        
        //get the projection objects required
        var llProj = new OpenLayers.Projection("EPSG:4326");
        var mapProj = this.map.getProjectionObject();
        var mapRes = this.map.getResolution();
        
        //if the map is in lon/lat, then the lines are straight and only one
        //point is required
        if (mapProj.proj && mapProj.proj.projName == "longlat") {
            this.numPoints = 1;
        }
        
        //get the map center in EPSG:4326
        var mapCenter = this.map.getCenter(); //lon and lat here are really map x and y
        var mapCenterLL = new OpenLayers.Pixel(mapCenter.lon, mapCenter.lat);
        OpenLayers.Projection.transform(mapCenterLL, mapProj, llProj);
        
        /* This block of code determines the lon/lat interval to use for the
         * grid by calculating the diagonal size of one grid cell at the map
         * center.  Iterates through the intervals array until the diagonal
         * length is less than the targetSize option.
         */
        //find lat/lon interval that results in a grid of less than the target size
        var testSq = this.targetSize*mapRes;
        testSq *= testSq;   //compare squares rather than doing a square root to save time
        var llInterval;
        for (var i=0; i<this.intervals.length; ++i) {
            llInterval = this.intervals[i];   //could do this for both x and y??
            var delta = llInterval/2;  
            var p1 = mapCenterLL.offset({x: -delta, y: -delta});  //test coords in EPSG:4326 space
            var p2 = mapCenterLL.offset({x: delta, y: delta});
            OpenLayers.Projection.transform(p1, llProj, mapProj); // convert them back to map projection
            OpenLayers.Projection.transform(p2, llProj, mapProj);
            var distSq = (p1.x-p2.x)*(p1.x-p2.x) + (p1.y-p2.y)*(p1.y-p2.y);
            if (distSq <= testSq) {
                break;
            }
        }
        //alert(llInterval);
        
        //round the LL center to an even number based on the interval
        mapCenterLL.x = Math.floor(mapCenterLL.x/llInterval)*llInterval;
        mapCenterLL.y = Math.floor(mapCenterLL.y/llInterval)*llInterval;
        //TODO adjust for minutses/seconds?
        
        /* The following 2 blocks calculate the nodes of the grid along a 
         * line of constant longitude (then latitiude) running through the
         * center of the map until it reaches the map edge.  The calculation
         * goes from the center in both directions to the edge.
         */
        //get the central longitude line, increment the latitude
        var iter = 0;
        var centerLonPoints = [mapCenterLL.clone()];
        var newPoint = mapCenterLL.clone();
        var mapXY;
        do {
            newPoint = newPoint.offset({x: 0, y: llInterval});
            mapXY = OpenLayers.Projection.transform(newPoint.clone(), llProj, mapProj);
            centerLonPoints.unshift(newPoint);
        } while (mapBounds.containsPixel(mapXY) && ++iter<1000);
        newPoint = mapCenterLL.clone();
        do {          
            newPoint = newPoint.offset({x: 0, y: -llInterval});
            mapXY = OpenLayers.Projection.transform(newPoint.clone(), llProj, mapProj);
            centerLonPoints.push(newPoint);
        } while (mapBounds.containsPixel(mapXY) && ++iter<1000);
        
        //get the central latitude line, increment the longitude
        iter = 0;
        var centerLatPoints = [mapCenterLL.clone()];
        newPoint = mapCenterLL.clone();
        do {
            newPoint = newPoint.offset({x: -llInterval, y: 0});
            mapXY = OpenLayers.Projection.transform(newPoint.clone(), llProj, mapProj);
            centerLatPoints.unshift(newPoint);
        } while (mapBounds.containsPixel(mapXY) && ++iter<1000);
        newPoint = mapCenterLL.clone();
        do {          
            newPoint = newPoint.offset({x: llInterval, y: 0});
            mapXY = OpenLayers.Projection.transform(newPoint.clone(), llProj, mapProj);
            centerLatPoints.push(newPoint);
        } while (mapBounds.containsPixel(mapXY) && ++iter<1000);
        
        //now generate a line for each node in the central lat and lon lines
        //first loop over constant longitude
        var lines = [];
        for(var i=0; i < centerLatPoints.length; ++i) {
            var lon = centerLatPoints[i].x;
            var pointList = [];
            var labelPoint = null;
            var latEnd = Math.min(centerLonPoints[0].y, 90);
            var latStart = Math.max(centerLonPoints[centerLonPoints.length - 1].y, -90);
            var latDelta = (latEnd - latStart)/this.numPoints;
            var lat = latStart;
            for(var j=0; j<= this.numPoints; ++j) {
                var gridPoint = new OpenLayers.Geometry.Point(lon,lat);
                gridPoint.transform(llProj, mapProj);
                pointList.push(gridPoint);
                lat += latDelta;
                if (gridPoint.y >= mapBounds.bottom && !labelPoint) {
                    labelPoint = gridPoint;
                }
            }
            if (this.labelled) {
                //keep track of when this grid line crosses the map bounds to set
                //the label position
                //labels along the bottom, add 10 pixel offset up into the map
                //TODO add option for labels on top
                var labelPos = new OpenLayers.Geometry.Point(labelPoint.x,mapBounds.bottom);
                var labelAttrs = {
                    value: lon,
                    label: this.labelled?OpenLayers.Util.getFormattedLonLat(lon, "lon", this.labelFormat):"",
                    labelAlign: "cb",
                    xOffset: 0,
                    yOffset: 2
                }; 
                this.gratLayer.addFeatures(new OpenLayers.Feature.Vector(labelPos,labelAttrs));
            }
            var geom = new OpenLayers.Geometry.LineString(pointList);
            lines.push(new OpenLayers.Feature.Vector(geom));
        }
        
        //now draw the lines of constant latitude
        for (var j=0; j < centerLonPoints.length; ++j) {
            lat = centerLonPoints[j].y;
            if (lat<-90 || lat>90) {  //latitudes only valid between -90 and 90
                continue;
            }
            var pointList = [];
            var lonStart = centerLatPoints[0].x;
            var lonEnd = centerLatPoints[centerLatPoints.length - 1].x;
            var lonDelta = (lonEnd - lonStart)/this.numPoints;
            var lon = lonStart;
            var labelPoint = null;
            for(var i=0; i <= this.numPoints ; ++i) {
                var gridPoint = new OpenLayers.Geometry.Point(lon,lat);
                gridPoint.transform(llProj, mapProj);
                pointList.push(gridPoint);
                lon += lonDelta;
                if (gridPoint.x < mapBounds.right) {
                    labelPoint = gridPoint;
                }
            }
            if (this.labelled) {
                //keep track of when this grid line crosses the map bounds to set
                //the label position
                //labels along the right, 30 pixel offset left into the map
                //TODO add option for labels on left
                var labelPos = new OpenLayers.Geometry.Point(mapBounds.right, labelPoint.y); 
                var labelAttrs = {
                    value: lat,
                    label: this.labelled?OpenLayers.Util.getFormattedLonLat(lat, "lat", this.labelFormat):"",
                    labelAlign: "rb",
                    xOffset: -2,
                    yOffset: 2
                }; 
                this.gratLayer.addFeatures(new OpenLayers.Feature.Vector(labelPos,labelAttrs));
            }
            var geom = new OpenLayers.Geometry.LineString(pointList);
            lines.push(new OpenLayers.Feature.Vector(geom));
          }
          this.gratLayer.addFeatures(lines);
    },
    
    CLASS_NAME: "OpenLayers.Control.Graticule"
});

/* ======================================================================
    OpenLayers/Layer/UTFGrid.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/XYZ.js
 * @requires OpenLayers/Tile/UTFGrid.js
 */

/** 
 * Class: OpenLayers.Layer.UTFGrid
 * This Layer reads from UTFGrid tiled data sources.  Since UTFGrids are 
 * essentially JSON-based ASCII art with attached attributes, they are not 
 * visibly rendered.  In order to use them in the map, you must add a 
 * <OpenLayers.Control.UTFGrid> ontrol as well.
 *
 * Example:
 *
 * (start code)
 * var world_utfgrid = new OpenLayers.Layer.UTFGrid({
 *     url: "/tiles/world_utfgrid/${z}/${x}/${y}.json",
 *     utfgridResolution: 4,
 *     displayInLayerSwitcher: false
 * );
 * map.addLayer(world_utfgrid);
 * 
 * var control = new OpenLayers.Control.UTFGrid({
 *     layers: [world_utfgrid],
 *     handlerMode: 'move',
 *     callback: function(dataLookup) {
 *         // do something with returned data
 *     }
 * })
 * (end code)
 *
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.XYZ>
 */
OpenLayers.Layer.UTFGrid = OpenLayers.Class(OpenLayers.Layer.XYZ, {
    
    /**
     * APIProperty: isBaseLayer
     * Default is true, as this is designed to be a base tile source. 
     */
    isBaseLayer: false,
    
    /**
     * APIProperty: projection
     * {<OpenLayers.Projection>}
     * Source projection for the UTFGrids.  Default is "EPSG:900913".
     */
    projection: new OpenLayers.Projection("EPSG:900913"),

    /**
     * Property: useJSONP
     * {Boolean}
     * Should we use a JSONP script approach instead of a standard AJAX call?
     *
     * Set to true for using utfgrids from another server. 
     * Avoids same-domain policy restrictions. 
     * Note that this only works if the server accepts 
     * the callback GET parameter and dynamically 
     * wraps the returned json in a function call.
     * 
     * Default is false
     */
    useJSONP: false,
    
    /**
     * APIProperty: url
     * {String}
     * URL tempate for UTFGrid tiles.  Include x, y, and z parameters.
     * E.g. "/tiles/${z}/${x}/${y}.json"
     */

    /**
     * APIProperty: utfgridResolution
     * {Number}
     * Ratio of the pixel width to the width of a UTFGrid data point.  If an 
     *     entry in the grid represents a 4x4 block of pixels, the 
     *     utfgridResolution would be 4.  Default is 2 (specified in 
     *     <OpenLayers.Tile.UTFGrid>).
     */

    /**
     * Property: tileClass
     * {<OpenLayers.Tile>} The tile class to use for this layer.
     *     Defaults is <OpenLayers.Tile.UTFGrid>.
     */
    tileClass: OpenLayers.Tile.UTFGrid,

    /**
     * Constructor: OpenLayers.Layer.UTFGrid
     * Create a new UTFGrid layer.
     *
     * Parameters:
     * config - {Object} Configuration properties for the layer.
     *
     * Required configuration properties:
     * url - {String} The url template for UTFGrid tiles.  See the <url> property.
     */
    initialize: function(options) {
        OpenLayers.Layer.Grid.prototype.initialize.apply(
            this, [options.name, options.url, {}, options]
        );
        this.tileOptions = OpenLayers.Util.extend({
            utfgridResolution: this.utfgridResolution
        }, this.tileOptions);
    },
    
    /**
     * APIMethod: clone
     * Create a clone of this layer
     *
     * Parameters:
     * obj - {Object} Only used by a subclass of this layer.
     * 
     * Returns:
     * {<OpenLayers.Layer.UTFGrid>} An exact clone of this OpenLayers.Layer.UTFGrid
     */
    clone: function (obj) {
        if (obj == null) {
            obj = new OpenLayers.Layer.UTFGrid(this.getOptions());
        }

        // get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);

        return obj;
    },

    /**
     * APIProperty: getFeatureInfo
     * Get details about a feature associated with a map location.  The object
     *     returned will have id and data properties.  If the given location
     *     doesn't correspond to a feature, null will be returned.
     *
     * Parameters:
     * location - {<OpenLayers.LonLat>} map location
     *
     * Returns:
     * {Object} Object representing the feature id and UTFGrid data 
     *     corresponding to the given map location.  Returns null if the given
     *     location doesn't hit a feature.
     */
    getFeatureInfo: function(location) {
        var info = null;
        var tileInfo = this.getTileData(location);
        if (tileInfo.tile) {
            info = tileInfo.tile.getFeatureInfo(tileInfo.i, tileInfo.j);
        }
        return info;
    },

    /**
     * APIMethod: getFeatureId
     * Get the identifier for the feature associated with a map location.
     *
     * Parameters:
     * location - {<OpenLayers.LonLat>} map location
     *
     * Returns:
     * {String} The feature identifier corresponding to the given map location.
     *     Returns null if the location doesn't hit a feature.
     */
    getFeatureId: function(location) {
        var id = null;
        var info = this.getTileData(location);
        if (info.tile) {
            id = info.tile.getFeatureId(info.i, info.j);
        }
        return id;
    },

    CLASS_NAME: "OpenLayers.Layer.UTFGrid"
});
/* ======================================================================
    OpenLayers/Layer/ArcGISCache.js
   ====================================================================== */

/** 
 * @requires OpenLayers/Layer/XYZ.js
 */ 

/** 
 * Class: OpenLayers.Layer.ArcGISCache   
 * Layer for accessing cached map tiles from an ArcGIS Server style mapcache. 
 * Tile must already be cached for this layer to access it. This does not require 
 * ArcGIS Server itself.
 * 
 * A few attempts have been made at this kind of layer before. See 
 * http://trac.osgeo.org/openlayers/ticket/1967 
 * and 
 * http://trac.osgeo.org/openlayers/browser/sandbox/tschaub/arcgiscache/lib/OpenLayers/Layer/ArcGISCache.js
 *
 * Typically the problem encountered is that the tiles seem to "jump around".
 * This is due to the fact that the actual max extent for the tiles on AGS layers
 * changes at each zoom level due to the way these caches are constructed.
 * We have attempted to use the resolutions, tile size, and tile origin
 * from the cache meta data to make the appropriate changes to the max extent
 * of the tile to compensate for this behavior.  This must be done as zoom levels change
 * and before tiles are requested, which is why methods from base classes are overridden.
 *
 * For reference, you can access mapcache meta data in two ways. For accessing a 
 * mapcache through ArcGIS Server, you can simply go to the landing page for the
 * layer. (ie. http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer)
 * For accessing it directly through HTTP, there should always be a conf.xml file
 * in the root directory. 
 * (ie. http://serverx.esri.com/arcgiscache/DG_County_roads_yesA_backgroundDark/Layers/conf.xml)
 *  
 *Inherits from: 
 *  - <OpenLayers.Layer.XYZ>             
 */    
OpenLayers.Layer.ArcGISCache = OpenLayers.Class(OpenLayers.Layer.XYZ, {  

    /**
     * APIProperty: url
     * {String | Array} The base URL for the layer cache.  You can also
     *     provide a list of URL strings for the layer if your cache is
     *     available from multiple origins.  This must be set before the layer
     *     is drawn.
     */
    url: null,
    
   /**
    * APIProperty: tileOrigin
    * {<OpenLayers.LonLat>} The location of the tile origin for the cache.
    *     An ArcGIS cache has it's origin at the upper-left (lowest x value
    *     and highest y value of the coordinate system).  The units for the
    *     tile origin should be the same as the units for the cached data.
    */
    tileOrigin: null, 
   
   /**
    * APIProperty: tileSize
    * {<OpenLayers.Size>} This size of each tile. Defaults to 256 by 256 pixels.
    */
    tileSize: new OpenLayers.Size(256, 256),
    
   /**
    * APIProperty: useAGS
    * {Boolean} Indicates if we are going to be accessing the ArcGIS Server (AGS)
    *     cache via an AGS MapServer or directly through HTTP. When accessing via
    *     AGS the path structure uses a standard z/y/x structure. But AGS actually
    *     stores the tile images on disk using a hex based folder structure that looks
    *     like "http://example.com/mylayer/L00/R00000000/C00000000.png".  Learn more
    *     about this here:
    *     http://blogs.esri.com/Support/blogs/mappingcenter/archive/2010/08/20/Checking-Your-Local-Cache-Folders.aspx
    *     Defaults to true;
    */    
    useArcGISServer: true,

   /**
    * APIProperty: type
    * {String} Image type for the layer.  This becomes the filename extension
    *     in tile requests.  Default is "png" (generating a url like
    *     "http://example.com/mylayer/L00/R00000000/C00000000.png").
    */
    type: 'png',
    
    /**
    * APIProperty: useScales
    * {Boolean} Optional override to indicate that the layer should use 'scale' information
    *     returned from the server capabilities object instead of 'resolution' information.
    *     This can be important if your tile server uses an unusual DPI for the tiles.
    */
    useScales: false,
    
   /**
    * APIProperty: overrideDPI
    * {Boolean} Optional override to change the OpenLayers.DOTS_PER_INCH setting based 
    *     on the tile information in the server capabilities object.  This can be useful 
    *     if your server has a non-standard DPI setting on its tiles, and you're only using 
    *     tiles with that DPI.  This value is used while OpenLayers is calculating resolution
    *     using scales, and is not necessary if you have resolution information. (This is
    *     typically the case)  Regardless, this setting can be useful, but is dangerous
    *     because it will impact other layers while calculating resolution.  Only use this
    *     if you know what you are doing.  (See OpenLayers.Util.getResolutionFromScale)
    */
    overrideDPI: false,
    
   /**
    * Constructor: OpenLayers.Layer.ArcGISCache 
    * Creates a new instance of this class 
    * 
    * Parameters: 
    * name - {String} 
    * url - {String} 
    * options - {Object} extra layer options
    */ 
    initialize: function(name, url, options) { 
        OpenLayers.Layer.XYZ.prototype.initialize.apply(this, arguments);

        if (this.resolutions) {        
            this.serverResolutions = this.resolutions;
            this.maxExtent = this.getMaxExtentForResolution(this.resolutions[0]);
        }

        // this block steps through translating the values from the server layer JSON 
        // capabilities object into values that we can use.  This is also a helpful
        // reference when configuring this layer directly.
        if (this.layerInfo) {
            // alias the object
            var info = this.layerInfo;
            
            // build our extents
            var startingTileExtent = new OpenLayers.Bounds(
                info.fullExtent.xmin, 
                info.fullExtent.ymin, 
                info.fullExtent.xmax, 
                info.fullExtent.ymax  
            );

            // set our projection based on the given spatial reference.
            // esri uses slightly different IDs, so this may not be comprehensive
            this.projection = 'EPSG:' + info.spatialReference.wkid;
            this.sphericalMercator = (info.spatialReference.wkid == 102100);
            
            // convert esri units into openlayers units (basic feet or meters only)
            this.units = (info.units == "esriFeet") ? 'ft' : 'm';

            // optional extended section based on whether or not the server returned
            // specific tile information
            if (!!info.tileInfo) {            
                // either set the tiles based on rows/columns, or specific width/height
                this.tileSize = new OpenLayers.Size(
                    info.tileInfo.width || info.tileInfo.cols, 
                    info.tileInfo.height || info.tileInfo.rows
                );
                
                // this must be set when manually configuring this layer
                this.tileOrigin = new OpenLayers.LonLat(
                    info.tileInfo.origin.x, 
                    info.tileInfo.origin.y
                );

                var upperLeft = new OpenLayers.Geometry.Point(
                    startingTileExtent.left, 
                    startingTileExtent.top
                );
                
                var bottomRight = new OpenLayers.Geometry.Point(
                    startingTileExtent.right, 
                    startingTileExtent.bottom
                );            
                
                if (this.useScales) {
                    this.scales = [];
                } else {
                    this.resolutions = [];
                }
                
                this.lods = [];
                for(var key in info.tileInfo.lods) {
                    if (info.tileInfo.lods.hasOwnProperty(key)) {
                        var lod = info.tileInfo.lods[key];
                        if (this.useScales) {
                            this.scales.push(lod.scale);
                        } else {
                            this.resolutions.push(lod.resolution);
                        }
                    
                        var start = this.getContainingTileCoords(upperLeft, lod.resolution);
                        lod.startTileCol = start.x;
                        lod.startTileRow = start.y;
                    
                        var end = this.getContainingTileCoords(bottomRight, lod.resolution);
                        lod.endTileCol = end.x;
                        lod.endTileRow = end.y;    
                        this.lods.push(lod);
                    }
                }

                this.maxExtent = this.calculateMaxExtentWithLOD(this.lods[0]);
                this.serverResolutions = this.resolutions;
                if (this.overrideDPI && info.tileInfo.dpi) {
                    // see comment above for 'overrideDPI'
                    OpenLayers.DOTS_PER_INCH = info.tileInfo.dpi;
                }
            } 
       }
    }, 

   /** 
    * Method: getContainingTileCoords
    * Calculates the x/y pixel corresponding to the position of the tile
    *     that contains the given point and for the for the given resolution.
    * 
    * Parameters:
    * point - {<OpenLayers.Geometry.Point>} 
    * res - {Float} The resolution for which to compute the extent.
    * 
    * Returns: 
    * {<OpenLayers.Pixel>} The x/y pixel corresponding to the position 
    * of the upper left tile for the given resolution.
    */
    getContainingTileCoords: function(point, res) {
        return new OpenLayers.Pixel(
           Math.max(Math.floor((point.x - this.tileOrigin.lon) / (this.tileSize.w * res)),0),
           Math.max(Math.floor((this.tileOrigin.lat - point.y) / (this.tileSize.h * res)),0)
        );
    },
    
   /** 
    * Method: calculateMaxExtentWithLOD
    * Given a Level of Detail object from the server, this function
    *     calculates the actual max extent
    * 
    * Parameters: 
    * lod - {Object} a Level of Detail Object from the server capabilities object 
            representing a particular zoom level
    * 
    * Returns: 
    * {<OpenLayers.Bounds>} The actual extent of the tiles for the given zoom level
    */
   calculateMaxExtentWithLOD: function(lod) {
        // the max extent we're provided with just overlaps some tiles
        // our real extent is the bounds of all the tiles we touch

        var numTileCols = (lod.endTileCol - lod.startTileCol) + 1;
        var numTileRows = (lod.endTileRow - lod.startTileRow) + 1;        

        var minX = this.tileOrigin.lon + (lod.startTileCol * this.tileSize.w * lod.resolution);
        var maxX = minX + (numTileCols * this.tileSize.w * lod.resolution);

        var maxY = this.tileOrigin.lat - (lod.startTileRow * this.tileSize.h * lod.resolution);
        var minY = maxY - (numTileRows * this.tileSize.h * lod.resolution);
        return new OpenLayers.Bounds(minX, minY, maxX, maxY);
   },
    
   /** 
    * Method: calculateMaxExtentWithExtent
    * Given a 'suggested' max extent from the server, this function uses
    *     information about the actual tile sizes to determine the actual
    *     extent of the layer.
    * 
    * Parameters: 
    * extent - {<OpenLayers.Bounds>} The 'suggested' extent for the layer
    * res - {Float} The resolution for which to compute the extent.
    * 
    * Returns: 
    * {<OpenLayers.Bounds>} The actual extent of the tiles for the given zoom level
    */
   calculateMaxExtentWithExtent: function(extent, res) {
        var upperLeft = new OpenLayers.Geometry.Point(extent.left, extent.top);
        var bottomRight = new OpenLayers.Geometry.Point(extent.right, extent.bottom);
        var start = this.getContainingTileCoords(upperLeft, res);
        var end = this.getContainingTileCoords(bottomRight, res);
        var lod = {
            resolution: res,
            startTileCol: start.x,
            startTileRow: start.y,
            endTileCol: end.x,
            endTileRow: end.y
        };
        return this.calculateMaxExtentWithLOD(lod);
   },
    
    /** 
    * Method: getUpperLeftTileCoord
    * Calculates the x/y pixel corresponding to the position 
    *     of the upper left tile for the given resolution.
    * 
    * Parameters: 
    * res - {Float} The resolution for which to compute the extent.
    * 
    * Returns: 
    * {<OpenLayers.Pixel>} The x/y pixel corresponding to the position 
    * of the upper left tile for the given resolution.
    */
    getUpperLeftTileCoord: function(res) {
        var upperLeft = new OpenLayers.Geometry.Point(
            this.maxExtent.left,
            this.maxExtent.top);
        return this.getContainingTileCoords(upperLeft, res);
    },

    /** 
    * Method: getLowerRightTileCoord
    * Calculates the x/y pixel corresponding to the position 
    *     of the lower right tile for the given resolution.
    *  
    * Parameters: 
    * res - {Float} The resolution for which to compute the extent.
    * 
    * Returns: 
    * {<OpenLayers.Pixel>} The x/y pixel corresponding to the position
    * of the lower right tile for the given resolution.
    */
    getLowerRightTileCoord: function(res) {
        var bottomRight = new OpenLayers.Geometry.Point(
            this.maxExtent.right,
            this.maxExtent.bottom);
        return this.getContainingTileCoords(bottomRight, res);
    },
    
   /** 
    * Method: getMaxExtentForResolution
    * Since the max extent of a set of tiles can change from zoom level
    *     to zoom level, we need to be able to calculate that max extent 
    *     for a given resolution.
    *
    * Parameters: 
    * res - {Float} The resolution for which to compute the extent.
    * 
    * Returns: 
    * {<OpenLayers.Bounds>} The extent for this resolution
    */ 
    getMaxExtentForResolution: function(res) {
        var start = this.getUpperLeftTileCoord(res);
        var end = this.getLowerRightTileCoord(res);

        var numTileCols = (end.x - start.x) + 1;
        var numTileRows = (end.y - start.y) + 1;

        var minX = this.tileOrigin.lon + (start.x * this.tileSize.w * res);
        var maxX = minX + (numTileCols * this.tileSize.w * res);
        
        var maxY = this.tileOrigin.lat - (start.y * this.tileSize.h * res);
        var minY = maxY - (numTileRows * this.tileSize.h * res);
        return new OpenLayers.Bounds(minX, minY, maxX, maxY);
    },
    
   /** 
    * APIMethod: clone 
    * Returns an exact clone of this OpenLayers.Layer.ArcGISCache
    * 
    * Parameters: 
    * [obj] - {Object} optional object to assign the cloned instance to.
    *  
    * Returns: 
    * {<OpenLayers.Layer.ArcGISCache>} clone of this instance 
    */ 
    clone: function (obj) { 
        if (obj == null) { 
            obj = new OpenLayers.Layer.ArcGISCache(this.name, this.url, this.options);
        }
        return OpenLayers.Layer.XYZ.prototype.clone.apply(this, [obj]);
    },

    /**
     * Method: getMaxExtent
     * Get this layer's maximum extent.
     *
     * Returns:
     * {<OpenLayers.Bounds>}
     */
    getMaxExtent: function() {
        var resolution = this.map.getResolution();
        return this.maxExtent = this.getMaxExtentForResolution(resolution);
    },

    /**
     * Method: getTileOrigin
     * Determine the origin for aligning the grid of tiles.  
     *     The origin will be derived from the layer's <maxExtent> property. 
     *
     * Returns:
     * {<OpenLayers.LonLat>} The tile origin.
     */
    getTileOrigin: function() {
        var extent = this.getMaxExtent();
        return new OpenLayers.LonLat(extent.left, extent.bottom);
    },

   /**
    * Method: getURL
    * Determine the URL for a tile given the tile bounds.  This is should support
    *     urls that access tiles through an ArcGIS Server MapServer or directly through
    *     the hex folder structure using HTTP.  Just be sure to set the useArcGISServer
    *     property appropriately!  This is basically the same as 
    *     'OpenLayers.Layer.TMS.getURL',  but with the addition of hex addressing,
    *     and tile rounding.
    *
    * Parameters:
    * bounds - {<OpenLayers.Bounds>}
    *
    * Returns:
    * {String} The URL for a tile based on given bounds.
    */
    getURL: function (bounds) {
        var res = this.getResolution(); 

        // tile center
        var originTileX = (this.tileOrigin.lon + (res * this.tileSize.w/2)); 
        var originTileY = (this.tileOrigin.lat - (res * this.tileSize.h/2));

        var center = bounds.getCenterLonLat();
        var point = { x: center.lon, y: center.lat };
        var x = (Math.round(Math.abs((center.lon - originTileX) / (res * this.tileSize.w)))); 
        var y = (Math.round(Math.abs((originTileY - center.lat) / (res * this.tileSize.h)))); 
        var z = this.map.getZoom();

        // this prevents us from getting pink tiles (non-existant tiles)
        if (this.lods) {        
            var lod = this.lods[this.map.getZoom()];
            if ((x < lod.startTileCol || x > lod.endTileCol) 
                || (y < lod.startTileRow || y > lod.endTileRow)) {
                    return null;
            }
        }
        else {
            var start = this.getUpperLeftTileCoord(res);
            var end = this.getLowerRightTileCoord(res);
            if ((x < start.x || x >= end.x)
                || (y < start.y || y >= end.y)) {
                    return null;
            }        
        }

        // Construct the url string
        var url = this.url;
        var s = '' + x + y + z;

        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(s, url);
        }

        // Accessing tiles through ArcGIS Server uses a different path
        // structure than direct access via the folder structure.
        if (this.useArcGISServer) {
            // AGS MapServers have pretty url access to tiles
            url = url + '/tile/${z}/${y}/${x}';
        } else {
            // The tile images are stored using hex values on disk.
            x = 'C' + this.zeroPad(x, 8, 16);
            y = 'R' + this.zeroPad(y, 8, 16);
            z = 'L' + this.zeroPad(z, 2, 16);
            url = url + '/${z}/${y}/${x}.' + this.type;
        }

        // Write the values into our formatted url
        url = OpenLayers.String.format(url, {'x': x, 'y': y, 'z': z});

        return OpenLayers.Util.urlAppend(
            url, OpenLayers.Util.getParameterString(this.params)
        );
    },

    /**
     * Method: zeroPad
     * Create a zero padded string optionally with a radix for casting numbers.
     *
     * Parameters:
     * num - {Number} The number to be zero padded.
     * len - {Number} The length of the string to be returned.
     * radix - {Number} An integer between 2 and 36 specifying the base to use
     *     for representing numeric values.
     */
    zeroPad: function(num, len, radix) {
        var str = num.toString(radix || 10);
        while (str.length < len) {
            str = "0" + str;
        }
        return str;
    },

    CLASS_NAME: 'OpenLayers.Layer.ArcGISCache' 
}); 
/* ======================================================================
    OpenLayers/Control/WMSGetFeatureInfo.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Click.js
 * @requires OpenLayers/Handler/Hover.js
 * @requires OpenLayers/Request.js
 * @requires OpenLayers/Format/WMSGetFeatureInfo.js
 */

/**
 * Class: OpenLayers.Control.WMSGetFeatureInfo
 * The WMSGetFeatureInfo control uses a WMS query to get information about a point on the map.  The
 * information may be in a display-friendly format such as HTML, or a machine-friendly format such 
 * as GML, depending on the server's capabilities and the client's configuration.  This control 
 * handles click or hover events, attempts to parse the results using an OpenLayers.Format, and 
 * fires a 'getfeatureinfo' event with the click position, the raw body of the response, and an 
 * array of features if it successfully read the response.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.WMSGetFeatureInfo = OpenLayers.Class(OpenLayers.Control, {

   /**
     * APIProperty: hover
     * {Boolean} Send GetFeatureInfo requests when mouse stops moving.
     *     Default is false.
     */
    hover: false,

    /**
     * APIProperty: drillDown
     * {Boolean} Drill down over all WMS layers in the map. When
     *     using drillDown mode, hover is not possible, and an infoFormat that
     *     returns parseable features is required. Default is false.
     */
    drillDown: false,

    /**
     * APIProperty: maxFeatures
     * {Integer} Maximum number of features to return from a WMS query. This
     *     sets the feature_count parameter on WMS GetFeatureInfo
     *     requests.
     */
    maxFeatures: 10,

    /** APIProperty: clickCallback
     *  {String} The click callback to register in the
     *      {<OpenLayers.Handler.Click>} object created when the hover
     *      option is set to false. Default is "click".
     */
    clickCallback: "click",
    
    /** APIProperty: output
     *  {String} Either "features" or "object". When triggering a 
     *      getfeatureinfo request should we pass on an array of features
     *      or an object with with a "features" property and other properties
     *      (such as the url of the WMS). Default is "features".
     */
    output: "features",
    
    /**
     * Property: layers
     * {Array(<OpenLayers.Layer.WMS>)} The layers to query for feature info.
     *     If omitted, all map WMS layers with a url that matches this <url> or
     *     <layerUrls> will be considered.
     */
    layers: null,

    /**
     * Property: queryVisible
     * {Boolean} If true, filter out hidden layers when searching the map for
     *     layers to query.  Default is false.
     */
    queryVisible: false,

    /**
     * Property: url
     * {String} The URL of the WMS service to use.  If not provided, the url
     *     of the first eligible layer will be used.
     */
    url: null,
    
    /**
     * Property: layerUrls
     * {Array(String)} Optional list of urls for layers that should be queried.
     *     This can be used when the layer url differs from the url used for
     *     making GetFeatureInfo requests (in the case of a layer using cached
     *     tiles).
     */
    layerUrls: null,

    /**
     * Property: infoFormat
     * {String} The mimetype to request from the server. If you are using 
     * drillDown mode and have multiple servers that do not share a common 
     * infoFormat, you can override the control's infoFormat by providing an 
     * INFO_FORMAT parameter in your <OpenLayers.Layer.WMS> instance(s).
     */
    infoFormat: 'text/html',
    
    /**
     * Property: vendorParams
     * {Object} Additional parameters that will be added to the request, for
     * WMS implementations that support them. This could e.g. look like
     * (start code)
     * {
     *     radius: 5
     * }
     * (end)
     */
    vendorParams: {},
    
    /**
     * Property: format
     * {<OpenLayers.Format>} A format for parsing GetFeatureInfo responses.
     *     Default is <OpenLayers.Format.WMSGetFeatureInfo>.
     */
    format: null,
    
    /**
     * Property: formatOptions
     * {Object} Optional properties to set on the format (if one is not provided
     *     in the <format> property.
     */
    formatOptions: null,

    /**
     * APIProperty: handlerOptions
     * {Object} Additional options for the handlers used by this control, e.g.
     * (start code)
     * {
     *     "click": {delay: 100},
     *     "hover": {delay: 300}
     * }
     * (end)
     */
    handlerOptions: null,
    
    /**
     * Property: handler
     * {Object} Reference to the <OpenLayers.Handler> for this control
     */
    handler: null,
    
    /**
     * Property: hoverRequest
     * {<OpenLayers.Request>} contains the currently running hover request
     *     (if any).
     */
    hoverRequest: null,
    
    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforegetfeatureinfo - Triggered before the request is sent.
     *      The event object has an *xy* property with the position of the 
     *      mouse click or hover event that triggers the request.
     * nogetfeatureinfo - no queryable layers were found.
     * getfeatureinfo - Triggered when a GetFeatureInfo response is received.
     *      The event object has a *text* property with the body of the
     *      response (String), a *features* property with an array of the
     *      parsed features, an *xy* property with the position of the mouse
     *      click or hover event that triggered the request, and a *request*
     *      property with the request itself. If drillDown is set to true and
     *      multiple requests were issued to collect feature info from all
     *      layers, *text* and *request* will only contain the response body
     *      and request object of the last request.
     */

    /**
     * Constructor: <OpenLayers.Control.WMSGetFeatureInfo>
     *
     * Parameters:
     * options - {Object} 
     */
    initialize: function(options) {
        options = options || {};
        options.handlerOptions = options.handlerOptions || {};

        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        
        if(!this.format) {
            this.format = new OpenLayers.Format.WMSGetFeatureInfo(
                options.formatOptions
            );
        }
        
        if(this.drillDown === true) {
            this.hover = false;
        }

        if(this.hover) {
            this.handler = new OpenLayers.Handler.Hover(
                   this, {
                       'move': this.cancelHover,
                       'pause': this.getInfoForHover
                   },
                   OpenLayers.Util.extend(this.handlerOptions.hover || {}, {
                       'delay': 250
                   }));
        } else {
            var callbacks = {};
            callbacks[this.clickCallback] = this.getInfoForClick;
            this.handler = new OpenLayers.Handler.Click(
                this, callbacks, this.handlerOptions.click || {});
        }
    },

    /**
     * Method: getInfoForClick 
     * Called on click
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    getInfoForClick: function(evt) {
        this.events.triggerEvent("beforegetfeatureinfo", {xy: evt.xy});
        // Set the cursor to "wait" to tell the user we're working on their
        // click.
        OpenLayers.Element.addClass(this.map.viewPortDiv, "olCursorWait");
        this.request(evt.xy, {});
    },
   
    /**
     * Method: getInfoForHover
     * Pause callback for the hover handler
     *
     * Parameters:
     * evt - {Object}
     */
    getInfoForHover: function(evt) {
        this.events.triggerEvent("beforegetfeatureinfo", {xy: evt.xy});
        this.request(evt.xy, {hover: true});
    },

    /**
     * Method: cancelHover
     * Cancel callback for the hover handler
     */
    cancelHover: function() {
        if (this.hoverRequest) {
            this.hoverRequest.abort();
            this.hoverRequest = null;
        }
    },

    /**
     * Method: findLayers
     * Internal method to get the layers, independent of whether we are
     *     inspecting the map or using a client-provided array
     */
    findLayers: function() {

        var candidates = this.layers || this.map.layers;
        var layers = [];
        var layer, url;
        for(var i = candidates.length - 1; i >= 0; --i) {
            layer = candidates[i];
            if(layer instanceof OpenLayers.Layer.WMS &&
               (!this.queryVisible || layer.getVisibility())) {
                url = OpenLayers.Util.isArray(layer.url) ? layer.url[0] : layer.url;
                // if the control was not configured with a url, set it
                // to the first layer url
                if(this.drillDown === false && !this.url) {
                    this.url = url;
                }
                if(this.drillDown === true || this.urlMatches(url)) {
                    layers.push(layer);
                }
            }
        }
        return layers;
    },
    
    /**
     * Method: urlMatches
     * Test to see if the provided url matches either the control <url> or one
     *     of the <layerUrls>.
     *
     * Parameters:
     * url - {String} The url to test.
     *
     * Returns:
     * {Boolean} The provided url matches the control <url> or one of the
     *     <layerUrls>.
     */
    urlMatches: function(url) {
        var matches = OpenLayers.Util.isEquivalentUrl(this.url, url);
        if(!matches && this.layerUrls) {
            for(var i=0, len=this.layerUrls.length; i<len; ++i) {
                if(OpenLayers.Util.isEquivalentUrl(this.layerUrls[i], url)) {
                    matches = true;
                    break;
                }
            }
        }
        return matches;
    },

    /**
     * Method: buildWMSOptions
     * Build an object with the relevant WMS options for the GetFeatureInfo request
     *
     * Parameters:
     * url - {String} The url to be used for sending the request
     * layers - {Array(<OpenLayers.Layer.WMS)} An array of layers
     * clickPosition - {<OpenLayers.Pixel>} The position on the map where the mouse
     *     event occurred.
     * format - {String} The format from the corresponding GetMap request
     */
    buildWMSOptions: function(url, layers, clickPosition, format) {
        var layerNames = [], styleNames = [];
        for (var i = 0, len = layers.length; i < len; i++) {
            if (layers[i].params.LAYERS != null) {
                layerNames = layerNames.concat(layers[i].params.LAYERS);
                styleNames = styleNames.concat(this.getStyleNames(layers[i]));
            }
        }
        var firstLayer = layers[0];
        // use the firstLayer's projection if it matches the map projection -
        // this assumes that all layers will be available in this projection
        var projection = this.map.getProjection();
        var layerProj = firstLayer.projection;
        if (layerProj && layerProj.equals(this.map.getProjectionObject())) {
            projection = layerProj.getCode();
        }
        var params = OpenLayers.Util.extend({
            service: "WMS",
            version: firstLayer.params.VERSION,
            request: "GetFeatureInfo",
            exceptions: firstLayer.params.EXCEPTIONS,
            bbox: this.map.getExtent().toBBOX(null,
                firstLayer.reverseAxisOrder()),
            feature_count: this.maxFeatures,
            height: this.map.getSize().h,
            width: this.map.getSize().w,
            format: format,
            info_format: firstLayer.params.INFO_FORMAT || this.infoFormat
        }, (parseFloat(firstLayer.params.VERSION) >= 1.3) ?
            {
                crs: projection,
                i: parseInt(clickPosition.x),
                j: parseInt(clickPosition.y)
            } :
            {
                srs: projection,
                x: parseInt(clickPosition.x),
                y: parseInt(clickPosition.y)
            }
        );
        if (layerNames.length != 0) {
            params = OpenLayers.Util.extend({
                layers: layerNames,
                query_layers: layerNames,
                styles: styleNames
            }, params);
        }
        OpenLayers.Util.applyDefaults(params, this.vendorParams);
        return {
            url: url,
            params: OpenLayers.Util.upperCaseObject(params),
            callback: function(request) {
                this.handleResponse(clickPosition, request, url);
            },
            scope: this
        };
    },

    /**
     * Method: getStyleNames
     * Gets the STYLES parameter for the layer. Make sure the STYLES parameter
     * matches the LAYERS parameter
     * 
     * Parameters:
     * layer - {<OpenLayers.Layer.WMS>}
     *
     * Returns:
     * {Array(String)} The STYLES parameter
     */
    getStyleNames: function(layer) {
        // in the event of a WMS layer bundling multiple layers but not
        // specifying styles,we need the same number of commas to specify
        // the default style for each of the layers.  We can't just leave it
        // blank as we may be including other layers that do specify styles.
        var styleNames;
        if (layer.params.STYLES) {
            styleNames = layer.params.STYLES;
        } else {
            if (OpenLayers.Util.isArray(layer.params.LAYERS)) {
                styleNames = new Array(layer.params.LAYERS.length);
            } else { // Assume it's a String
                styleNames = layer.params.LAYERS.replace(/[^,]/g, "");
            }
        }
        return styleNames;
    },

    /**
     * Method: request
     * Sends a GetFeatureInfo request to the WMS
     * 
     * Parameters:
     * clickPosition - {<OpenLayers.Pixel>} The position on the map where the
     *     mouse event occurred.
     * options - {Object} additional options for this method.
     * 
     * Valid options:
     * - *hover* {Boolean} true if we do the request for the hover handler
     */
    request: function(clickPosition, options) {
        var layers = this.findLayers();
        if(layers.length == 0) {
            this.events.triggerEvent("nogetfeatureinfo");
            // Reset the cursor.
            OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
            return;
        }
        
        options = options || {};
        if(this.drillDown === false) {
            var wmsOptions = this.buildWMSOptions(this.url, layers,
                clickPosition, layers[0].params.FORMAT); 
            var request = OpenLayers.Request.GET(wmsOptions);
    
            if (options.hover === true) {
                this.hoverRequest = request;
            }
        } else {
            this._requestCount = 0;
            this._numRequests = 0;
            this.features = [];
            // group according to service url to combine requests
            var services = {}, url;
            for(var i=0, len=layers.length; i<len; i++) {
                var layer = layers[i];
                var service, found = false;
                url = OpenLayers.Util.isArray(layer.url) ? layer.url[0] : layer.url;
                if(url in services) {
                    services[url].push(layer);
                } else {
                    this._numRequests++;
                    services[url] = [layer];
                }
            }
            var layers;
            for (var url in services) {
                layers = services[url];
                var wmsOptions = this.buildWMSOptions(url, layers, 
                    clickPosition, layers[0].params.FORMAT);
                OpenLayers.Request.GET(wmsOptions); 
            }
        }
    },

    /**
     * Method: triggerGetFeatureInfo
     * Trigger the getfeatureinfo event when all is done
     *
     * Parameters:
     * request - {XMLHttpRequest} The request object
     * xy - {<OpenLayers.Pixel>} The position on the map where the
     *     mouse event occurred.
     * features - {Array(<OpenLayers.Feature.Vector>)} or
     *     {Array({Object}) when output is "object". The object has a url and a
     *     features property which contains an array of features.
     */
    triggerGetFeatureInfo: function(request, xy, features) {
        this.events.triggerEvent("getfeatureinfo", {
            text: request.responseText,
            features: features,
            request: request,
            xy: xy
        });

        // Reset the cursor.
        OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
    },
    
    /**
     * Method: handleResponse
     * Handler for the GetFeatureInfo response.
     * 
     * Parameters:
     * xy - {<OpenLayers.Pixel>} The position on the map where the
     *     mouse event occurred.
     * request - {XMLHttpRequest} The request object.
     * url - {String} The url which was used for this request.
     */
    handleResponse: function(xy, request, url) {
        
        var doc = request.responseXML;
        if(!doc || !doc.documentElement) {
            doc = request.responseText;
        }
        var features = this.format.read(doc);
        if (this.drillDown === false) {
            this.triggerGetFeatureInfo(request, xy, features);
        } else {
            this._requestCount++;
            if (this.output === "object") {
                this._features = (this._features || []).concat(
                    {url: url, features: features}
                );
            } else {
            this._features = (this._features || []).concat(features);
            }
            if (this._requestCount === this._numRequests) {
                this.triggerGetFeatureInfo(request, xy, this._features.concat()); 
                delete this._features;
                delete this._requestCount;
                delete this._numRequests;
            }
        }
    },

    CLASS_NAME: "OpenLayers.Control.WMSGetFeatureInfo"
});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1_3_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities/v1_3.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities/v1_3_0
 * Read WMS Capabilities version 1.3.0. 
 * SLD 1.1.0 adds in the extra operations DescribeLayer and GetLegendGraphic, 
 * see: http://schemas.opengis.net/sld/1.1.0/sld_capabilities.xsd
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMSCapabilities.v1_3>
 */
OpenLayers.Format.WMSCapabilities.v1_3_0 = OpenLayers.Class(
    OpenLayers.Format.WMSCapabilities.v1_3, {
    
    /**
     * Property: version
     * {String} The specific parser version.
     */
    version: "1.3.0",
    
    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_3_0" 

});
/* ======================================================================
    OpenLayers/Format/SOSGetFeatureOfInterest.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */
 
/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/GML/v3.js
 */

/**
 * Class: OpenLayers.Format.SOSGetFeatureOfInterest
 * Read and write SOS GetFeatureOfInterest. This is used to get to
 * the location of the features (stations). The stations can have 1 or more
 * sensors.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.SOSGetFeatureOfInterest = OpenLayers.Class(
    OpenLayers.Format.XML, {
    
    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        sos: "http://www.opengis.net/sos/1.0",
        gml: "http://www.opengis.net/gml",
        sa: "http://www.opengis.net/sampling/1.0",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: schemaLocation
     * {String} Schema location
     */
    schemaLocation: "http://www.opengis.net/sos/1.0 http://schemas.opengis.net/sos/1.0.0/sosAll.xsd",

    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "sos",

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },
    
    /**
     * Constructor: OpenLayers.Format.SOSGetFeatureOfInterest
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * APIMethod: read
     * Parse a GetFeatureOfInterest response and return an array of features
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Array(<OpenLayers.Feature.Vector>)} An array of features. 
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }

        var info = {features: []};
        this.readNode(data, info);
       
        var features = [];
        for (var i=0, len=info.features.length; i<len; i++) {
            var container = info.features[i];
            // reproject features if needed
            if(this.internalProjection && this.externalProjection &&
                container.components[0]) {
                    container.components[0].transform(
                        this.externalProjection, this.internalProjection
                    );
            }             
            var feature = new OpenLayers.Feature.Vector(
                container.components[0], container.attributes);
            features.push(feature);
        }
        return features;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "sa": {
            "SamplingPoint": function(node, obj) {
                // sampling point can also be without a featureMember if 
                // there is only 1
                if (!obj.attributes) {
                    var feature = {attributes: {}};
                    obj.features.push(feature);
                    obj = feature;
                }
                obj.attributes.id = this.getAttributeNS(node, 
                    this.namespaces.gml, "id");
                this.readChildNodes(node, obj);
            },
            "position": function (node, obj) {
                this.readChildNodes(node, obj);
            }
        },
        "gml": OpenLayers.Util.applyDefaults({
            "FeatureCollection": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "featureMember": function(node, obj) {
                var feature = {attributes: {}};
                obj.features.push(feature);
                this.readChildNodes(node, feature);
            },
            "name": function(node, obj) {
                obj.attributes.name = this.getChildValue(node);
            },
            "pos": function(node, obj) {
                // we need to parse the srsName to get to the 
                // externalProjection, that's why we cannot use
                // GML v3 for this
                if (!this.externalProjection) {
                    this.externalProjection = new OpenLayers.Projection(
                        node.getAttribute("srsName"));
                }
             OpenLayers.Format.GML.v3.prototype.readers.gml.pos.apply(
                    this, [node, obj]);
            }
        }, OpenLayers.Format.GML.v3.prototype.readers.gml)
    },
    
    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "sos": {
            "GetFeatureOfInterest": function(options) {
                var node = this.createElementNSPlus("GetFeatureOfInterest", {
                    attributes: {
                        version: this.VERSION,
                        service: 'SOS',
                        "xsi:schemaLocation": this.schemaLocation
                    } 
                }); 
                for (var i=0, len=options.fois.length; i<len; i++) {
                    this.writeNode("FeatureOfInterestId", {foi: options.fois[i]}, node);
                }
                return node; 
            },
            "FeatureOfInterestId": function(options) {
                var node = this.createElementNSPlus("FeatureOfInterestId", {value: options.foi});
                return node;
            }
        }
    },

    CLASS_NAME: "OpenLayers.Format.SOSGetFeatureOfInterest" 

});
/* ======================================================================
    OpenLayers/Format/SOSGetObservation.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/SOSGetFeatureOfInterest.js
 */

/**
 * Class: OpenLayers.Format.SOSGetObservation
 * Read and write SOS GetObersation (to get the actual values from a sensor) 
 *     version 1.0.0
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.SOSGetObservation = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows",
        gml: "http://www.opengis.net/gml",
        sos: "http://www.opengis.net/sos/1.0",
        ogc: "http://www.opengis.net/ogc",
        om: "http://www.opengis.net/om/1.0",
        sa: "http://www.opengis.net/sampling/1.0",
        xlink: "http://www.w3.org/1999/xlink",
        xsi: "http://www.w3.org/2001/XMLSchema-instance"
    },

    /**
     * Property: regExes
     * Compiled regular expressions for manipulating strings.
     */
    regExes: {
        trimSpace: (/^\s*|\s*$/g),
        removeSpace: (/\s*/g),
        splitSpace: (/\s+/),
        trimComma: (/\s*,\s*/g)
    },

    /**
     * Constant: VERSION
     * {String} 1.0.0
     */
    VERSION: "1.0.0",

    /**
     * Property: schemaLocation
     * {String} Schema location
     */
    schemaLocation: "http://www.opengis.net/sos/1.0 http://schemas.opengis.net/sos/1.0.0/sosGetObservation.xsd",

    /**
     * Property: defaultPrefix
     */
    defaultPrefix: "sos",

    /**
     * Constructor: OpenLayers.Format.SOSGetObservation
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Method: read
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} An object containing the measurements
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var info = {measurements: [], observations: []};
        this.readNode(data, info);
        return info;
    },

    /**
     * Method: write
     *
     * Parameters:
     * options - {Object} Optional object.
     *
     * Returns:
     * {String} An SOS GetObservation request XML string.
     */
    write: function(options) {
        var node = this.writeNode("sos:GetObservation", options);
        node.setAttribute("xmlns:om", this.namespaces.om);
        node.setAttribute("xmlns:ogc", this.namespaces.ogc);
        this.setAttributeNS(
            node, this.namespaces.xsi,
            "xsi:schemaLocation", this.schemaLocation
        );
        return OpenLayers.Format.XML.prototype.write.apply(this, [node]);
    }, 

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "om": {
            "ObservationCollection": function(node, obj) {
                obj.id = this.getAttributeNS(node, this.namespaces.gml, "id");
                this.readChildNodes(node, obj);
            },
            "member": function(node, observationCollection) {
                this.readChildNodes(node, observationCollection);
            },
            "Measurement": function(node, observationCollection) {
                var measurement = {};
                observationCollection.measurements.push(measurement);
                this.readChildNodes(node, measurement);
            },
            "Observation": function(node, observationCollection) {
                var observation = {};
                observationCollection.observations.push(observation);
                this.readChildNodes(node, observation);
            },
            "samplingTime": function(node, measurement) {
                var samplingTime = {};
                measurement.samplingTime = samplingTime;
                this.readChildNodes(node, samplingTime);
            },
            "observedProperty": function(node, measurement) {
                measurement.observedProperty = 
                    this.getAttributeNS(node, this.namespaces.xlink, "href");
                this.readChildNodes(node, measurement);
            },
            "procedure": function(node, measurement) {
                measurement.procedure = 
                    this.getAttributeNS(node, this.namespaces.xlink, "href");
                this.readChildNodes(node, measurement);
            },
            "featureOfInterest": function(node, observation) {
                var foi = {features: []};
                observation.fois = [];
                observation.fois.push(foi);
                this.readChildNodes(node, foi);
                // postprocessing to get actual features
                var features = [];
                for (var i=0, len=foi.features.length; i<len; i++) {
                    var feature = foi.features[i];
                    features.push(new OpenLayers.Feature.Vector(
                        feature.components[0], feature.attributes));
                }
                foi.features = features;
            },
            "result": function(node, measurement) {
                var result = {};
                measurement.result = result;
                if (this.getChildValue(node) !== '') {
                    result.value = this.getChildValue(node);
                    result.uom = node.getAttribute("uom");
                } else {
                    this.readChildNodes(node, result);
                }
            }
        },
        "sa": OpenLayers.Format.SOSGetFeatureOfInterest.prototype.readers.sa,
        "gml": OpenLayers.Util.applyDefaults({
            "TimeInstant": function(node, samplingTime) {
               var timeInstant = {};
                samplingTime.timeInstant = timeInstant;
                this.readChildNodes(node, timeInstant);
            },
            "timePosition": function(node, timeInstant) {
                timeInstant.timePosition = this.getChildValue(node);
            }
        }, OpenLayers.Format.SOSGetFeatureOfInterest.prototype.readers.gml)
    },

    /**
     * Property: writers
     * As a compliment to the readers property, this structure contains public
     *     writing functions grouped by namespace alias and named like the
     *     node names they produce.
     */
    writers: {
        "sos": {
            "GetObservation": function(options) {
                var node = this.createElementNSPlus("GetObservation", {
                    attributes: {
                        version: this.VERSION,
                        service: 'SOS'
                    } 
                }); 
                this.writeNode("offering", options, node);
                if (options.eventTime) {
                    this.writeNode("eventTime", options, node);
                }
                for (var procedure in options.procedures) {
                    this.writeNode("procedure", options.procedures[procedure], node);
                }
                for (var observedProperty in options.observedProperties) {
                    this.writeNode("observedProperty", options.observedProperties[observedProperty], node);
                }
                if (options.foi) {
                    this.writeNode("featureOfInterest", options.foi, node);
                }
                this.writeNode("responseFormat", options, node);
                if (options.resultModel) {
                    this.writeNode("resultModel", options, node);
                }
                if (options.responseMode) {
                    this.writeNode("responseMode", options, node);
                }
                return node; 
            },
            "featureOfInterest": function(foi) {
                var node = this.createElementNSPlus("featureOfInterest");
                this.writeNode("ObjectID", foi.objectId, node);
                return node;
            },
            "ObjectID": function(options) {
                return this.createElementNSPlus("ObjectID",
                    {value: options});
            },
            "responseFormat": function(options) {
                return this.createElementNSPlus("responseFormat", 
                    {value: options.responseFormat});
            },
            "procedure": function(procedure) {
                return this.createElementNSPlus("procedure", 
                    {value: procedure});
            },
            "offering": function(options) {
                return this.createElementNSPlus("offering", {value: 
                    options.offering});
            },
            "observedProperty": function(observedProperty) {
                return this.createElementNSPlus("observedProperty", 
                    {value: observedProperty});
            },
            "eventTime": function(options) {
                var node = this.createElementNSPlus("eventTime");
                if (options.eventTime === 'latest') {
                    this.writeNode("ogc:TM_Equals", options, node);
                }
                return node;
            },
            "resultModel": function(options) {
                return this.createElementNSPlus("resultModel", {value: 
                    options.resultModel});
            },
            "responseMode": function(options) {
                return this.createElementNSPlus("responseMode", {value: 
                    options.responseMode});
            }
        },
        "ogc": {
            "TM_Equals": function(options) {
                var node = this.createElementNSPlus("ogc:TM_Equals");
                this.writeNode("ogc:PropertyName", {property: 
                    "urn:ogc:data:time:iso8601"}, node);
                if (options.eventTime === 'latest') {
                    this.writeNode("gml:TimeInstant", {value: 'latest'}, node);
                }
                return node;
            },
            "PropertyName": function(options) {
                return this.createElementNSPlus("ogc:PropertyName", 
                    {value: options.property});
            }
        },
        "gml": {
            "TimeInstant": function(options) {
                var node = this.createElementNSPlus("gml:TimeInstant");
                this.writeNode("gml:timePosition", options, node);
                return node;
            },
            "timePosition": function(options) {
                var node = this.createElementNSPlus("gml:timePosition", 
                    {value: options.value});
                return node;
            }
        }
    },
    
    CLASS_NAME: "OpenLayers.Format.SOSGetObservation" 

});
/* ======================================================================
    OpenLayers/Control/UTFGrid.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Hover.js
 * @requires OpenLayers/Handler/Click.js
 */

/**
 * Class: OpenLayers.Control.UTFGrid
 *
 * This Control provides behavior associated with UTFGrid Layers.
 * These 'hit grids' provide underlying feature attributes without
 * calling the server (again). This control allows Mousemove, Hovering 
 * and Click events to trigger callbacks that use the attributes in 
 * whatever way you need. 
 *
 * The most common example may be a UTFGrid layer containing feature
 * attributes that are displayed in a div as you mouseover.
 *
 * Example Code:
 *
 * (start code)
 * var world_utfgrid = new OpenLayers.Layer.UTFGrid( 
 *     'UTFGrid Layer', 
 *     "http://tiles/world_utfgrid/${z}/${x}/${y}.json"
 * );
 * map.addLayer(world_utfgrid);
 * 
 * var control = new OpenLayers.Control.UTFGrid({
 *     layers: [world_utfgrid],
 *     handlerMode: 'move',
 *     callback: function(infoLookup) {
 *         // do something with returned data
 *
 *     }
 * })
 * (end code)
 *
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
    
    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /** 
     * APIProperty: Layers
     * List of layers to consider. Must be Layer.UTFGrids
     * `null` is the default indicating all UTFGrid Layers are queried.
     * {Array} <OpenLayers.Layer.UTFGrid> 
     */
    layers: null,

    /* Property: defaultHandlerOptions
     * The default opts passed to the handler constructors
     */
    defaultHandlerOptions: {
        'delay': 300,
        'pixelTolerance': 4,
        'stopMove': false,
        'single': true,
        'double': false,
        'stopSingle': false,
        'stopDouble': false
    },

    /* APIProperty: handlerMode
     * Defaults to 'click'. Can be 'hover' or 'move'.
     */
    handlerMode: 'click',

    /**
     * APIMethod: setHandler
     * sets this.handlerMode and calls resetHandler()
     *
     * Parameters:
     * hm - {String} Handler Mode string; 'click', 'hover' or 'move'.
     */
    setHandler: function(hm) {
        this.handlerMode = hm;
        this.resetHandler();
    },

    /**
     * Method: resetHandler
     * Deactivates the old hanlder and creates a new
     * <OpenLayers.Handler> based on the mode specified in
     * this.handlerMode
     *
     */
    resetHandler: function() {
        if (this.handler) {
            this.handler.deactivate();
            this.handler.destroy();
            this.handler = null;
        }
   
        if (this.handlerMode == 'hover') {
            // Handle this event on hover
            this.handler = new OpenLayers.Handler.Hover(
                this,
                {'pause': this.handleEvent, 'move': this.reset},
                this.handlerOptions
            );
        } else if (this.handlerMode == 'click') {
            // Handle this event on click
            this.handler = new OpenLayers.Handler.Click(
                this, {
                    'click': this.handleEvent
                }, this.handlerOptions
            );
        } else if (this.handlerMode == 'move') {
            this.handler = new OpenLayers.Handler.Hover(
                this,
                // Handle this event while hovering OR moving
                {'pause': this.handleEvent, 'move': this.handleEvent},
                this.handlerOptions
            );
        }
        if (this.handler) {
            return true;
        } else {
            return false;
        }
    },

    /**
     * Constructor: <OpenLayers.Control.UTFGrid>
     *
     * Parameters:
     * options - {Object} 
     */
    initialize: function(options) {
        options = options || {};
        options.handlerOptions = options.handlerOptions || this.defaultHandlerOptions;
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.resetHandler();
    }, 

    /**
     * Method: handleEvent
     * Internal method called when specified event is triggered.
     * 
     * This method does several things:
     *
     * Gets the lonLat of the event.
     *
     * Loops through the appropriate hit grid layers and gathers the attributes.
     *
     * Passes the attributes to the callback
     *
     * Parameters:
     * evt - {<OpenLayers.Event>} 
     */
    handleEvent: function(evt) {
        if (evt == null) {
            this.reset();
            return;
        }

        var lonLat = this.map.getLonLatFromPixel(evt.xy);
        if (!lonLat) { 
            return;
        }    
        
        var layers = this.findLayers();
        if (layers.length > 0) {
            var infoLookup = {};
            var layer, idx;
            for (var i=0, len=layers.length; i<len; i++) {
                layer = layers[i];
                idx = OpenLayers.Util.indexOf(this.map.layers, layer);
                infoLookup[idx] = layer.getFeatureInfo(lonLat);
            }
            this.callback(infoLookup, lonLat, evt.xy);
        }
    },

    /**
     * APIMethod: callback
     * Function to be called when a mouse event corresponds with a location that
     *     includes data in one of the configured UTFGrid layers.
     *
     * Parameters:
     * infoLookup - {Object} Keys of this object are layer indexes and can be
     *     used to resolve a layer in the map.layers array.  The structure of
     *     the property values depend on the data included in the underlying
     *     UTFGrid and may be any valid JSON type.  
     */
    callback: function(infoLookup) {
        // to be provided in the constructor
    },

    /**
     * Method: reset
     * Calls the callback with null.
     */
    reset: function(evt) {
        this.callback(null);
    },

    /**
     * Method: findLayers
     * Internal method to get the layers, independent of whether we are
     *     inspecting the map or using a client-provided array
     *
     * The default value of this.layers is null; this causes the 
     * findLayers method to return ALL UTFGrid layers encountered.
     *
     * Parameters:
     * None
     *
     * Returns:
     * {Array} Layers to handle on each event
     */
    findLayers: function() {
        var candidates = this.layers || this.map.layers;
        var layers = [];
        var layer;
        for (var i=candidates.length-1; i>=0; --i) {
            layer = candidates[i];
            if (layer instanceof OpenLayers.Layer.UTFGrid ) { 
                layers.push(layer);
            }
        }
        return layers;
    },

    CLASS_NAME: "OpenLayers.Control.UTFGrid"
});
/* ======================================================================
    OpenLayers/Format/CQL.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WKT.js
 */

/**
 * Class: OpenLayers.Format.CQL
 * Read CQL strings to get <OpenLayers.Filter> objects.  Write 
 *     <OpenLayers.Filter> objects to get CQL strings. Create a new parser with 
 *     the <OpenLayers.Format.CQL> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format>
 */
OpenLayers.Format.CQL = (function() {
    
    var tokens = [
        "PROPERTY", "COMPARISON", "VALUE", "LOGICAL"
    ],

    patterns = {
        PROPERTY: /^[_a-zA-Z]\w*/,
        COMPARISON: /^(=|<>|<=|<|>=|>|LIKE)/i,
        COMMA: /^,/,
        LOGICAL: /^(AND|OR)/i,
        VALUE: /^('\w+'|\d+(\.\d*)?|\.\d+)/,
        LPAREN: /^\(/,
        RPAREN: /^\)/,
        SPATIAL: /^(BBOX|INTERSECTS|DWITHIN|WITHIN|CONTAINS)/i,
        NOT: /^NOT/i,
        BETWEEN: /^BETWEEN/i,
        GEOMETRY: function(text) {
            var type = /^(POINT|LINESTRING|POLYGON|MULTIPOINT|MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION)/.exec(text);
            if (type) {
                var len = text.length;
                var idx = text.indexOf("(", type[0].length);
                if (idx > -1) {
                    var depth = 1;
                    while (idx < len && depth > 0) {
                        idx++;
                        switch(text.charAt(idx)) {
                            case '(':
                                depth++;
                                break;
                            case ')':
                                depth--;
                                break;
                            default:
                                // in default case, do nothing
                        }
                    }
                }
                return [text.substr(0, idx+1)];
            }
        },
        END: /^$/
    },

    follows = {
        LPAREN: ['GEOMETRY', 'SPATIAL', 'PROPERTY', 'VALUE', 'LPAREN'],
        RPAREN: ['NOT', 'LOGICAL', 'END', 'RPAREN'],
        PROPERTY: ['COMPARISON', 'BETWEEN', 'COMMA'],
        BETWEEN: ['VALUE'],
        COMPARISON: ['VALUE'],
        COMMA: ['GEOMETRY', 'VALUE', 'PROPERTY'],
        VALUE: ['LOGICAL', 'COMMA', 'RPAREN', 'END'],
        SPATIAL: ['LPAREN'],
        LOGICAL: ['NOT', 'VALUE', 'SPATIAL', 'PROPERTY', 'LPAREN'],
        NOT: ['PROPERTY', 'LPAREN'],
        GEOMETRY: ['COMMA', 'RPAREN']
    },

    operators = {
        '=': OpenLayers.Filter.Comparison.EQUAL_TO,
        '<>': OpenLayers.Filter.Comparison.NOT_EQUAL_TO,
        '<': OpenLayers.Filter.Comparison.LESS_THAN,
        '<=': OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO,
        '>': OpenLayers.Filter.Comparison.GREATER_THAN,
        '>=': OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO,
        'LIKE': OpenLayers.Filter.Comparison.LIKE,
        'BETWEEN': OpenLayers.Filter.Comparison.BETWEEN
    },

    operatorReverse = {},

    logicals = {
        'AND': OpenLayers.Filter.Logical.AND,
        'OR': OpenLayers.Filter.Logical.OR
    },

    logicalReverse = {},

    precedence = {
        'RPAREN': 3,
        'LOGICAL': 2,
        'COMPARISON': 1
    };

    var i;
    for (i in operators) {
        if (operators.hasOwnProperty(i)) {
            operatorReverse[operators[i]] = i;
        }
    }

    for (i in logicals) {
        if (logicals.hasOwnProperty(i)) {
            logicalReverse[logicals[i]] = i;
        }
    }

    function tryToken(text, pattern) {
        if (pattern instanceof RegExp) {
            return pattern.exec(text);
        } else {
            return pattern(text);
        }
    }

    function nextToken(text, tokens) {
        var i, token, len = tokens.length;
        for (i=0; i<len; i++) {
            token = tokens[i];
            var pat = patterns[token];
            var matches = tryToken(text, pat);
            if (matches) {
                var match = matches[0];
                var remainder = text.substr(match.length).replace(/^\s*/, "");
                return {
                    type: token,
                    text: match,
                    remainder: remainder
                };
            }
        }

        var msg = "ERROR: In parsing: [" + text + "], expected one of: ";
        for (i=0; i<len; i++) {
            token = tokens[i];
            msg += "\n    " + token + ": " + patterns[token];
        }

        throw new Error(msg);
    }

    function tokenize(text) {
        var results = [];
        var token, expect = ["NOT", "GEOMETRY", "SPATIAL", "PROPERTY", "LPAREN"];

        do {
            token = nextToken(text, expect);
            text = token.remainder;
            expect = follows[token.type];
            if (token.type != "END" && !expect) {
                throw new Error("No follows list for " + token.type);
            }
            results.push(token);
        } while (token.type != "END");

        return results;
    }

    function buildAst(tokens) {
        var operatorStack = [],
            postfix = [];

        while (tokens.length) {
            var tok = tokens.shift();
            switch (tok.type) {
                case "PROPERTY":
                case "GEOMETRY":
                case "VALUE":
                    postfix.push(tok);
                    break;
                case "COMPARISON":
                case "BETWEEN":
                case "LOGICAL":
                    var p = precedence[tok.type];

                    while (operatorStack.length > 0 &&
                        (precedence[operatorStack[operatorStack.length - 1].type] <= p)
                    ) {
                        postfix.push(operatorStack.pop());
                    }

                    operatorStack.push(tok);
                    break;
                case "SPATIAL":
                case "NOT":
                case "LPAREN":
                    operatorStack.push(tok);
                    break;
                case "RPAREN":
                    while (operatorStack.length > 0 &&
                        (operatorStack[operatorStack.length - 1].type != "LPAREN")
                    ) {
                        postfix.push(operatorStack.pop());
                    }
                    operatorStack.pop(); // toss out the LPAREN

                    if (operatorStack.length > 0 &&
                        operatorStack[operatorStack.length-1].type == "SPATIAL") {
                        postfix.push(operatorStack.pop());
                    }
                case "COMMA":
                case "END":
                    break;
                default:
                    throw new Error("Unknown token type " + tok.type);
            }
        }

        while (operatorStack.length > 0) {
            postfix.push(operatorStack.pop());
        }

        function buildTree() {
            var tok = postfix.pop();
            switch (tok.type) {
                case "LOGICAL":
                    var rhs = buildTree(),
                        lhs = buildTree();
                    return new OpenLayers.Filter.Logical({
                        filters: [lhs, rhs],
                        type: logicals[tok.text.toUpperCase()]
                    });
                case "NOT":
                    var operand = buildTree();
                    return new OpenLayers.Filter.Logical({
                        filters: [operand],
                        type: OpenLayers.Filter.Logical.NOT
                    });
                case "BETWEEN":
                    var min, max, property;
                    postfix.pop(); // unneeded AND token here
                    max = buildTree();
                    min = buildTree();
                    property = buildTree();
                    return new OpenLayers.Filter.Comparison({
                        property: property,
                        lowerBoundary: min,
                        upperBoundary: max,
                        type: OpenLayers.Filter.Comparison.BETWEEN
                    });
                case "COMPARISON":
                    var value = buildTree(),
                        property = buildTree();
                    return new OpenLayers.Filter.Comparison({
                        property: property,
                        value: value,
                        type: operators[tok.text.toUpperCase()]
                    });
                case "VALUE":
                    if ((/^'.*'$/).test(tok.text)) {
                        return tok.text.substr(1, tok.text.length - 2);
                    } else {
                        return Number(tok.text);
                    }
                case "SPATIAL":
                    switch(tok.text.toUpperCase()) {
                        case "BBOX":
                            var maxy = buildTree(),
                                maxx = buildTree(),
                                miny = buildTree(),
                                minx = buildTree(),
                                prop = buildTree();

                            return new OpenLayers.Filter.Spatial({
                                type: OpenLayers.Filter.Spatial.BBOX,
                                property: prop,
                                value: OpenLayers.Bounds.fromArray(
                                    [minx, miny, maxx, maxy]
                                )
                            });
                        case "INTERSECTS":
                            var value = buildTree(),
                                property = buildTree();
                            return new OpenLayers.Filter.Spatial({
                                type: OpenLayers.Filter.Spatial.INTERSECTS,
                                property: property,
                                value: value
                            });
                        case "WITHIN":
                            var value = buildTree(),
                                property = buildTree();
                            return new OpenLayers.Filter.Spatial({
                                type: OpenLayers.Filter.Spatial.WITHIN,
                                property: property,
                                value: value
                            });
                        case "CONTAINS":
                            var value = buildTree(),
                                property = buildTree();
                            return new OpenLayers.Filter.Spatial({
                                type: OpenLayers.Filter.Spatial.CONTAINS,
                                property: property,
                                value: value
                            });
                        case "DWITHIN":
                            var distance = buildTree(),
                                value = buildTree(),
                                property = buildTree();
                            return new OpenLayers.Filter.Spatial({
                                type: OpenLayers.Filter.Spatial.DWITHIN,
                                value: value,
                                property: property,
                                distance: Number(distance)
                            });
                    }
                case "GEOMETRY":
                    return OpenLayers.Geometry.fromWKT(tok.text);
                default:
                    return tok.text;
            }
        }

        var result = buildTree();
        if (postfix.length > 0) {
            var msg = "Remaining tokens after building AST: \n";
            for (var i = postfix.length - 1; i >= 0; i--) {
                msg += postfix[i].type + ": " + postfix[i].text + "\n";
            }
            throw new Error(msg);
        }

        return result;
    }

    return OpenLayers.Class(OpenLayers.Format, {
        /**
         * APIMethod: read
         * Generate a filter from a CQL string.

         * Parameters:
         * text - {String} The CQL text.
         *
         * Returns:
         * {<OpenLayers.Filter>} A filter based on the CQL text.
         */
        read: function(text) { 
            var result = buildAst(tokenize(text));
            if (this.keepData) {
                this.data = result;
            }
            return result;
        },

        /**
         * APIMethod: write
         * Convert a filter into a CQL string.

         * Parameters:
         * filter - {<OpenLayers.Filter>} The filter.
         *
         * Returns:
         * {String} A CQL string based on the filter.
         */
        write: function(filter) {
            if (filter instanceof OpenLayers.Geometry) {
                return filter.toString();
            }
            switch (filter.CLASS_NAME) {
                case "OpenLayers.Filter.Spatial":
                    switch(filter.type) {
                        case OpenLayers.Filter.Spatial.BBOX:
                            return "BBOX(" +
                                filter.property + "," +
                                filter.value.toBBOX() +
                                ")";
                        case OpenLayers.Filter.Spatial.DWITHIN:
                            return "DWITHIN(" +
                                filter.property + ", " +
                                this.write(filter.value) + ", " +
                                filter.distance + ")";
                        case OpenLayers.Filter.Spatial.WITHIN:
                            return "WITHIN(" +
                                filter.property + ", " +
                                this.write(filter.value) + ")";
                        case OpenLayers.Filter.Spatial.INTERSECTS:
                            return "INTERSECTS(" +
                                filter.property + ", " +
                                this.write(filter.value) + ")";
                        case OpenLayers.Filter.Spatial.CONTAINS:
                            return "CONTAINS(" +
                                filter.property + ", " +
                                this.write(filter.value) + ")";
                        default:
                            throw new Error("Unknown spatial filter type: " + filter.type);
                    }
                case "OpenLayers.Filter.Logical":
                    if (filter.type == OpenLayers.Filter.Logical.NOT) {
                        // TODO: deal with precedence of logical operators to 
                        // avoid extra parentheses (not urgent)
                        return "NOT (" + this.write(filter.filters[0]) + ")";
                    } else {
                        var res = "(";
                        var first = true;
                        for (var i = 0; i < filter.filters.length; i++) {
                            if (first) {
                                first = false;
                            } else {
                                res += ") " + logicalReverse[filter.type] + " (";
                            }
                            res += this.write(filter.filters[i]);
                        }
                        return res + ")";
                    }
                case "OpenLayers.Filter.Comparison":
                    if (filter.type == OpenLayers.Filter.Comparison.BETWEEN) {
                        return filter.property + " BETWEEN " + 
                            this.write(filter.lowerBoundary) + " AND " + 
                            this.write(filter.upperBoundary);
                    } else {
                        
                        return filter.property +
                            " " + operatorReverse[filter.type] + " " + 
                            this.write(filter.value);
                    }
                case undefined:
                    if (typeof filter === "string") {
                        return "'" + filter + "'";
                    } else if (typeof filter === "number") {
                        return String(filter);
                    }
                default:
                    throw new Error("Can't encode: " + filter.CLASS_NAME + " " + filter);
            }
        },

        CLASS_NAME: "OpenLayers.Format.CQL"

    });
})();

/* ======================================================================
    OpenLayers/Control/Split.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Path.js
 * @requires OpenLayers/Layer/Vector.js
 */

/**
 * Class: OpenLayers.Control.Split
 * Acts as a split feature agent while editing vector features.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.Split = OpenLayers.Class(OpenLayers.Control, {

    /** 
     * APIProperty: events
     * {<OpenLayers.Events>} Events instance for listeners and triggering
     *     control specific events.
     *
     * Register a listener for a particular event with the following syntax:
     * (code)
     * control.events.register(type, obj, listener);
     * (end)
     *
     * Supported event types (in addition to those from <OpenLayers.Control.events>):
     * beforesplit - Triggered before a split occurs.  Listeners receive an
     *     event object with *source* and *target* properties.
     * split - Triggered when a split occurs.  Listeners receive an event with
     *     an *original* property and a *features* property.  The original
     *     is a reference to the target feature that the sketch or modified
     *     feature intersects.  The features property is a list of all features
     *     that result from this single split.  This event is triggered before
     *     the resulting features are added to the layer (while the layer still
     *     has a reference to the original).
     * aftersplit - Triggered after all splits resulting from a single sketch
     *     or feature modification have occurred.  The original features
     *     have been destroyed and features that result from the split
     *     have already been added to the layer.  Listeners receive an event
     *     with a *source* and *features* property.  The source references the
     *     sketch or modified feature used as a splitter.  The features
     *     property is a list of all resulting features.
     */
    
    /**
     * APIProperty: layer
     * {<OpenLayers.Layer.Vector>} The target layer with features to be split.
     *     Set at construction or after construction with <setLayer>.
     */
    layer: null,
    
    /**
     * Property: source
     * {<OpenLayers.Layer.Vector>} Optional source layer.  Any newly created
     *     or modified features from this layer will be used to split features
     *     on the target layer.  If not provided, a temporary sketch layer will
     *     be created.
     */
    source: null,
    
    /**
     * Property: sourceOptions
     * {Options} If a temporary sketch layer is created, these layer options
     *     will be applied.
     */
    sourceOptions: null,

    /**
     * APIProperty: tolerance
     * {Number} Distance between the calculated intersection and a vertex on
     *     the source geometry below which the existing vertex will be used
     *     for the split.  Default is null.
     */
    tolerance: null,
    
    /**
     * APIProperty: edge
     * {Boolean} Allow splits given intersection of edges only.  Default is
     *     true.  If false, a vertex on the source must be within the
     *     <tolerance> distance of the calculated intersection for a split
     *     to occur.
     */
    edge: true,
    
    /**
     * APIProperty: deferDelete
     * {Boolean} Instead of removing features from the layer, set feature
     *     states of split features to DELETE.  This assumes a save strategy
     *     or other component is in charge of removing features from the
     *     layer.  Default is false.  If false, split features will be
     *     immediately deleted from the layer.
     */
    deferDelete: false,
    
    /**
     * APIProperty: mutual
     * {Boolean} If source and target layers are the same, split source
     *     features and target features where they intersect.  Default is
     *     true.  If false, only target features will be split.
     */
    mutual: true,
    
    /**
     * APIProperty: targetFilter
     * {<OpenLayers.Filter>} Optional filter that will be evaluated
     *     to determine if a feature from the target layer is eligible for
     *     splitting.
     */
    targetFilter: null,
    
    /**
     * APIProperty: sourceFilter
     * {<OpenLayers.Filter>} Optional filter that will be evaluated
     *     to determine if a feature from the source layer is eligible for
     *     splitting.
     */
    sourceFilter: null,
    
    /**
     * Property: handler
     * {<OpenLayers.Handler.Path>} The temporary sketch handler created if
     *     no source layer is provided.
     */
    handler: null,

    /**
     * Constructor: OpenLayers.Control.Split
     * Creates a new split control. A control is constructed with a target
     *     layer and an optional source layer. While the control is active,
     *     creating new features or modifying existing features on the source
     *     layer will result in splitting any eligible features on the target
     *     layer.  If no source layer is provided, a temporary sketch layer will
     *     be created to create lines for splitting features on the target.
     *
     * Parameters:
     * options - {Object} An object containing all configuration properties for
     *     the control.
     *
     * Valid options:
     * layer - {<OpenLayers.Layer.Vector>} The target layer.  Features from this
     *     layer will be split by new or modified features on the source layer
     *     or temporary sketch layer.
     * source - {<OpenLayers.Layer.Vector>} Optional source layer.  If provided
     *     newly created features or modified features will be used to split
     *     features on the target layer.  If not provided, a temporary sketch
     *     layer will be created for drawing lines.
     * tolerance - {Number} Optional value for the distance between a source
     *     vertex and the calculated intersection below which the split will
     *     occur at the vertex.
     * edge - {Boolean} Allow splits given intersection of edges only.  Default
     *     is true.  If false, a vertex on the source must be within the
     *     <tolerance> distance of the calculated intersection for a split
     *     to occur.
     * mutual - {Boolean} If source and target are the same, split source
     *     features and target features where they intersect.  Default is
     *     true.  If false, only target features will be split.
     * targetFilter - {<OpenLayers.Filter>} Optional filter that will be evaluated
     *     to determine if a feature from the target layer is eligible for
     *     splitting.
     * sourceFilter - {<OpenLayers.Filter>} Optional filter that will be evaluated
     *     to determine if a feature from the target layer is eligible for
     *     splitting.
     */
    initialize: function(options) {
        OpenLayers.Control.prototype.initialize.apply(this, [options]);
        this.options = options || {}; // TODO: this could be done by the super
        
        // set the source layer if provided
        if(this.options.source) {
            this.setSource(this.options.source);
        }
    },
    
    /**
     * APIMethod: setSource
     * Set the source layer for edits layer.
     *
     * Parameters:
     * layer - {<OpenLayers.Layer.Vector>}  The new source layer layer.  If
     *     null, a temporary sketch layer will be created.
     */
    setSource: function(layer) {
        if(this.active) {
            this.deactivate();
            if(this.handler) {
                this.handler.destroy();
                delete this.handler;
            }
            this.source = layer;
            this.activate();
        } else {
            this.source = layer;
        }
    },
    
    /**
     * APIMethod: activate
     * Activate the control.  Activating the control registers listeners for
     *     editing related events so that during feature creation and
     *     modification, features in the target will be considered for
     *     splitting.
     */
    activate: function() {
        var activated = OpenLayers.Control.prototype.activate.call(this);
        if(activated) {
            if(!this.source) {
                if(!this.handler) {
                    this.handler = new OpenLayers.Handler.Path(this,
                        {done: function(geometry) {
                            this.onSketchComplete({
                                feature: new OpenLayers.Feature.Vector(geometry)
                            });
                        }},
                        {layerOptions: this.sourceOptions}
                    );
                }
                this.handler.activate();
            } else if(this.source.events) {
                this.source.events.on({
                    sketchcomplete: this.onSketchComplete,
                    afterfeaturemodified: this.afterFeatureModified,
                    scope: this
                });
            }
        }
        return activated;
    },
    
    /**
     * APIMethod: deactivate
     * Deactivate the control.  Deactivating the control unregisters listeners
     *     so feature editing may proceed without engaging the split agent.
     */
    deactivate: function() {
        var deactivated = OpenLayers.Control.prototype.deactivate.call(this);
        if(deactivated) {
            if(this.source && this.source.events) {
                this.layer.events.un({
                    sketchcomplete: this.onSketchComplete,
                    afterfeaturemodified: this.afterFeatureModified,
                    scope: this
                });
            }
        }
        return deactivated;
    },
    
    /**
     * Method: onSketchComplete
     * Registered as a listener for the sketchcomplete event on the editable
     *     layer.
     *
     * Parameters:
     * event - {Object} The sketch complete event.
     *
     * Returns:
     * {Boolean} Stop the sketch from being added to the layer (it has been
     *     split).
     */
    onSketchComplete: function(event) {
        this.feature = null;
        return !this.considerSplit(event.feature);
    },
    
    /**
     * Method: afterFeatureModified
     * Registered as a listener for the afterfeaturemodified event on the
     *     editable layer.
     *
     * Parameters:
     * event - {Object} The after feature modified event.
     */
    afterFeatureModified: function(event) {
        if(event.modified) {
            var feature = event.feature;
            if (typeof feature.geometry.split === "function") {
                this.feature = event.feature;
                this.considerSplit(event.feature);
            }
        }
    },
    
    /**
     * Method: removeByGeometry
     * Remove a feature from a list based on the given geometry.
     *
     * Parameters:
     * features - {Array(<OpenLayers.Feature.Vector>)} A list of features.
     * geometry - {<OpenLayers.Geometry>} A geometry.
     */
    removeByGeometry: function(features, geometry) {
        for(var i=0, len=features.length; i<len; ++i) {
            if(features[i].geometry === geometry) {
                features.splice(i, 1);
                break;
            }
        }
    },
    
    /**
     * Method: isEligible
     * Test if a target feature is eligible for splitting.
     *
     * Parameters:
     * target - {<OpenLayers.Feature.Vector>} The target feature.
     *
     * Returns:
     * {Boolean} The target is eligible for splitting.
     */
    isEligible: function(target) {
        if (!target.geometry) {
            return false;
        } else {
            return (
                target.state !== OpenLayers.State.DELETE
            ) && (
                typeof target.geometry.split === "function"
            ) && (
                this.feature !== target
            ) && (
                !this.targetFilter ||
                this.targetFilter.evaluate(target.attributes)
            );
        }
    },

    /**
     * Method: considerSplit
     * Decide whether or not to split target features with the supplied
     *     feature.  If <mutual> is true, both the source and target features
     *     will be split if eligible.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The newly created or modified
     *     feature.
     *
     * Returns:
     * {Boolean} The supplied feature was split (and destroyed).
     */
    considerSplit: function(feature) {
        var sourceSplit = false;
        var targetSplit = false;
        if(!this.sourceFilter ||
           this.sourceFilter.evaluate(feature.attributes)) {
            var features = this.layer && this.layer.features || [];
            var target, results, proceed;
            var additions = [], removals = [];
            var mutual = (this.layer === this.source) && this.mutual;
            var options = {
                edge: this.edge,
                tolerance: this.tolerance,
                mutual: mutual
            };
            var sourceParts = [feature.geometry];
            var targetFeature, targetParts;
            var source, parts;
            for(var i=0, len=features.length; i<len; ++i) {
                targetFeature = features[i];
                if(this.isEligible(targetFeature)) {
                    targetParts = [targetFeature.geometry];
                    // work through source geoms - this array may change
                    for(var j=0; j<sourceParts.length; ++j) { 
                        source = sourceParts[j];
                        // work through target parts - this array may change
                        for(var k=0; k<targetParts.length; ++k) {
                            target = targetParts[k];
                            if(source.getBounds().intersectsBounds(target.getBounds())) {
                                results = source.split(target, options);
                                if(results) {
                                    proceed = this.events.triggerEvent(
                                        "beforesplit", {source: feature, target: targetFeature}
                                    );
                                    if(proceed !== false) {
                                        if(mutual) {
                                            parts = results[0];
                                            // handle parts that result from source splitting
                                            if(parts.length > 1) {
                                                // splice in new source parts
                                                parts.unshift(j, 1); // add args for splice below
                                                Array.prototype.splice.apply(sourceParts, parts);
                                                j += parts.length - 3;
                                            }
                                            results = results[1];
                                        }
                                        // handle parts that result from target splitting
                                        if(results.length > 1) {
                                            // splice in new target parts
                                            results.unshift(k, 1); // add args for splice below
                                            Array.prototype.splice.apply(targetParts, results);
                                            k += results.length - 3;
                                        }
                                    }
                                }
                            }
                        }
                    }
                    if(targetParts && targetParts.length > 1) {
                        this.geomsToFeatures(targetFeature, targetParts);
                        this.events.triggerEvent("split", {
                            original: targetFeature,
                            features: targetParts
                        });
                        Array.prototype.push.apply(additions, targetParts);
                        removals.push(targetFeature);
                        targetSplit = true;
                    }
                }
            }
            if(sourceParts && sourceParts.length > 1) {
                this.geomsToFeatures(feature, sourceParts);
                this.events.triggerEvent("split", {
                    original: feature,
                    features: sourceParts
                });
                Array.prototype.push.apply(additions, sourceParts);
                removals.push(feature);
                sourceSplit = true;
            }
            if(sourceSplit || targetSplit) {
                // remove and add feature events are suppressed
                // listen for split event on this control instead
                if(this.deferDelete) {
                    // Set state instead of removing.  Take care to avoid
                    // setting delete for features that have not yet been
                    // inserted - those should be destroyed immediately.
                    var feat, destroys = [];
                    for(var i=0, len=removals.length; i<len; ++i) {
                        feat = removals[i];
                        if(feat.state === OpenLayers.State.INSERT) {
                            destroys.push(feat);
                        } else {
                            feat.state = OpenLayers.State.DELETE;
                            this.layer.drawFeature(feat);
                        }
                    }
                    this.layer.destroyFeatures(destroys, {silent: true});
                    for(var i=0, len=additions.length; i<len; ++i) {
                        additions[i].state = OpenLayers.State.INSERT;
                    }
                } else {
                    this.layer.destroyFeatures(removals, {silent: true});
                }
                this.layer.addFeatures(additions, {silent: true});
                this.events.triggerEvent("aftersplit", {
                    source: feature,
                    features: additions
                });
            }
        }
        return sourceSplit;
    },
    
    /**
     * Method: geomsToFeatures
     * Create new features given a template feature and a list of geometries.
     *     The list of geometries is modified in place.  The result will be
     *     a list of new features.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} The feature to be cloned.
     * geoms - {Array(<OpenLayers.Geometry>)} List of goemetries.  This will
     *     become a list of new features.
     */
    geomsToFeatures: function(feature, geoms) {
        var clone = feature.clone();
        delete clone.geometry;
        var newFeature;
        for(var i=0, len=geoms.length; i<len; ++i) {
            // turn results list from geoms to features
            newFeature = clone.clone();
            newFeature.geometry = geoms[i];
            newFeature.state = OpenLayers.State.INSERT;
            geoms[i] = newFeature;
        }
    },
    
    /**
     * Method: destroy
     * Clean up the control.
     */
    destroy: function() {
        if(this.active) {
            this.deactivate(); // TODO: this should be handled by the super
        }
        OpenLayers.Control.prototype.destroy.call(this);
    },

    CLASS_NAME: "OpenLayers.Control.Split"
});
/* ======================================================================
    OpenLayers/Layer/WMTS.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Layer/Grid.js
 */

/**
 * Class: OpenLayers.Layer.WMTS
 * Instances of the WMTS class allow viewing of tiles from a service that 
 *     implements the OGC WMTS specification version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.WMTS = OpenLayers.Class(OpenLayers.Layer.Grid, {
    
    /**
     * APIProperty: isBaseLayer
     * {Boolean} The layer will be considered a base layer.  Default is true.
     */
    isBaseLayer: true,

    /**
     * Property: version
     * {String} WMTS version.  Default is "1.0.0".
     */
    version: "1.0.0",
    
    /**
     * APIProperty: requestEncoding
     * {String} Request encoding.  Can be "REST" or "KVP".  Default is "KVP".
     */
    requestEncoding: "KVP",
    
    /**
     * APIProperty: url
     * {String|Array(String)} The base URL or request URL template for the WMTS
     * service. Must be provided. Array is only supported for base URLs, not
     * for request URL templates. URL templates are only supported for
     * REST <requestEncoding>.
     */
    url: null,

    /**
     * APIProperty: layer
     * {String} The layer identifier advertised by the WMTS service.  Must be 
     *     provided.
     */
    layer: null,
    
    /** 
     * APIProperty: matrixSet
     * {String} One of the advertised matrix set identifiers.  Must be provided.
     */
    matrixSet: null,

    /** 
     * APIProperty: style
     * {String} One of the advertised layer styles.  Must be provided.
     */
    style: null,
    
    /** 
     * APIProperty: format
     * {String} The image MIME type.  Default is "image/jpeg".
     */
    format: "image/jpeg",
    
    /**
     * APIProperty: tileOrigin
     * {<OpenLayers.LonLat>} The top-left corner of the tile matrix in map 
     *     units.  If the tile origin for each matrix in a set is different,
     *     the <matrixIds> should include a topLeftCorner property.  If
     *     not provided, the tile origin will default to the top left corner
     *     of the layer <maxExtent>.
     */
    tileOrigin: null,
    
    /**
     * APIProperty: tileFullExtent
     * {<OpenLayers.Bounds>}  The full extent of the tile set.  If not supplied,
     *     the layer's <maxExtent> property will be used.
     */
    tileFullExtent: null,

    /**
     * APIProperty: formatSuffix
     * {String} For REST request encoding, an image format suffix must be 
     *     included in the request.  If not provided, the suffix will be derived
     *     from the <format> property.
     */
    formatSuffix: null,    

    /**
     * APIProperty: matrixIds
     * {Array} A list of tile matrix identifiers.  If not provided, the matrix
     *     identifiers will be assumed to be integers corresponding to the 
     *     map zoom level.  If a list of strings is provided, each item should
     *     be the matrix identifier that corresponds to the map zoom level.
     *     Additionally, a list of objects can be provided.  Each object should
     *     describe the matrix as presented in the WMTS capabilities.  These
     *     objects should have the propertes shown below.
     * 
     * Matrix properties:
     * identifier - {String} The matrix identifier (required).
     * topLeftCorner - {<OpenLayers.LonLat>} The top left corner of the 
     *     matrix.  Must be provided if different than the layer <tileOrigin>.
     * tileWidth - {Number} The tile width for the matrix.  Must be provided 
     *     if different than the width given in the layer <tileSize>.
     * tileHeight - {Number} The tile height for the matrix.  Must be provided 
     *     if different than the height given in the layer <tileSize>.
     */
    matrixIds: null,
    
    /**
     * APIProperty: dimensions
     * {Array} For RESTful request encoding, extra dimensions may be specified.
     *     Items in this list should be property names in the <params> object.
     *     Values of extra dimensions will be determined from the corresponding
     *     values in the <params> object.
     */
    dimensions: null,
    
    /**
     * APIProperty: params
     * {Object} Extra parameters to include in tile requests.  For KVP 
     *     <requestEncoding>, these properties will be encoded in the request 
     *     query string.  For REST <requestEncoding>, these properties will
     *     become part of the request path, with order determined by the 
     *     <dimensions> list.
     */
    params: null,
    
    /**
     * APIProperty: zoomOffset
     * {Number} If your cache has more levels than you want to provide
     *     access to with this layer, supply a zoomOffset.  This zoom offset
     *     is added to the current map zoom level to determine the level
     *     for a requested tile.  For example, if you supply a zoomOffset
     *     of 3, when the map is at the zoom 0, tiles will be requested from
     *     level 3 of your cache.  Default is 0 (assumes cache level and map
     *     zoom are equivalent).  Additionally, if this layer is to be used
     *     as an overlay and the cache has fewer zoom levels than the base
     *     layer, you can supply a negative zoomOffset.  For example, if a
     *     map zoom level of 1 corresponds to your cache level zero, you would
     *     supply a -1 zoomOffset (and set the maxResolution of the layer
     *     appropriately).  The zoomOffset value has no effect if complete
     *     matrix definitions (including scaleDenominator) are supplied in
     *     the <matrixIds> property.  Defaults to 0 (no zoom offset).
     */
    zoomOffset: 0,

    /**
     * APIProperty: serverResolutions
     * {Array} A list of all resolutions available on the server.  Only set this
     *     property if the map resolutions differ from the server. This
     *     property serves two purposes. (a) <serverResolutions> can include
     *     resolutions that the server supports and that you don't want to
     *     provide with this layer; you can also look at <zoomOffset>, which is
     *     an alternative to <serverResolutions> for that specific purpose.
     *     (b) The map can work with resolutions that aren't supported by
     *     the server, i.e. that aren't in <serverResolutions>. When the
     *     map is displayed in such a resolution data for the closest
     *     server-supported resolution is loaded and the layer div is
     *     stretched as necessary.
     */
    serverResolutions: null,

    /**
     * Property: formatSuffixMap
     * {Object} a map between WMTS 'format' request parameter and tile image file suffix
     */
    formatSuffixMap: {
        "image/png": "png",
        "image/png8": "png",
        "image/png24": "png",
        "image/png32": "png",
        "png": "png",
        "image/jpeg": "jpg",
        "image/jpg": "jpg",
        "jpeg": "jpg",
        "jpg": "jpg"
    },
    
    /**
     * Property: matrix
     * {Object} Matrix definition for the current map resolution.  Updated by
     *     the <updateMatrixProperties> method.
     */
    matrix: null,
    
    /**
     * Constructor: OpenLayers.Layer.WMTS
     * Create a new WMTS layer.
     *
     * Example:
     * (code)
     * var wmts = new OpenLayers.Layer.WMTS({
     *     name: "My WMTS Layer",
     *     url: "http://example.com/wmts", 
     *     layer: "layer_id",
     *     style: "default",
     *     matrixSet: "matrix_id"
     * });
     * (end)
     *
     * Parameters:
     * config - {Object} Configuration properties for the layer.
     *
     * Required configuration properties:
     * url - {String} The base url for the service.  See the <url> property.
     * layer - {String} The layer identifier.  See the <layer> property.
     * style - {String} The layer style identifier.  See the <style> property.
     * matrixSet - {String} The tile matrix set identifier.  See the <matrixSet>
     *     property.
     *
     * Any other documented layer properties can be provided in the config object.
     */
    initialize: function(config) {

        // confirm required properties are supplied
        var required = {
            url: true,
            layer: true,
            style: true,
            matrixSet: true
        };
        for (var prop in required) {
            if (!(prop in config)) {
                throw new Error("Missing property '" + prop + "' in layer configuration.");
            }
        }

        config.params = OpenLayers.Util.upperCaseObject(config.params);
        var args = [config.name, config.url, config.params, config];
        OpenLayers.Layer.Grid.prototype.initialize.apply(this, args);
        

        // determine format suffix (for REST)
        if (!this.formatSuffix) {
            this.formatSuffix = this.formatSuffixMap[this.format] || this.format.split("/").pop();            
        }

        // expand matrixIds (may be array of string or array of object)
        if (this.matrixIds) {
            var len = this.matrixIds.length;
            if (len && typeof this.matrixIds[0] === "string") {
                var ids = this.matrixIds;
                this.matrixIds = new Array(len);
                for (var i=0; i<len; ++i) {
                    this.matrixIds[i] = {identifier: ids[i]};
                }
            }
        }

    },
    
    /**
     * Method: setMap
     */
    setMap: function() {
        OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
        this.updateMatrixProperties();
    },
    
    /**
     * Method: updateMatrixProperties
     * Called when map resolution changes to update matrix related properties.
     */
    updateMatrixProperties: function() {
        this.matrix = this.getMatrix();
        if (this.matrix) {
            if (this.matrix.topLeftCorner) {
                this.tileOrigin = this.matrix.topLeftCorner;
            }
            if (this.matrix.tileWidth && this.matrix.tileHeight) {
                this.tileSize = new OpenLayers.Size(
                    this.matrix.tileWidth, this.matrix.tileHeight
                );
            }
            if (!this.tileOrigin) { 
                this.tileOrigin = new OpenLayers.LonLat(
                    this.maxExtent.left, this.maxExtent.top
                );
            }   
            if (!this.tileFullExtent) { 
                this.tileFullExtent = this.maxExtent;
            }
        }
    },
    
    /**
     * Method: moveTo
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * zoomChanged - {Boolean} Tells when zoom has changed, as layers have to
     *     do some init work in that case.
     * dragging - {Boolean}
     */
    moveTo:function(bounds, zoomChanged, dragging) {
        if (zoomChanged || !this.matrix) {
            this.updateMatrixProperties();
        }
        return OpenLayers.Layer.Grid.prototype.moveTo.apply(this, arguments);
    },

    /**
     * APIMethod: clone
     * 
     * Parameters:
     * obj - {Object}
     * 
     * Returns:
     * {<OpenLayers.Layer.WMTS>} An exact clone of this <OpenLayers.Layer.WMTS>
     */
    clone: function(obj) {
        if (obj == null) {
            obj = new OpenLayers.Layer.WMTS(this.options);
        }
        //get all additions from superclasses
        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
        // copy/set any non-init, non-simple values here
        return obj;
    },

    /**
     * Method: getIdentifier
     * Get the current index in the matrixIds array.
     */
    getIdentifier: function() {
        return this.getServerZoom();
    },
    
    /**
     * Method: getMatrix
     * Get the appropriate matrix definition for the current map resolution.
     */
    getMatrix: function() {
        var matrix;
        if (!this.matrixIds || this.matrixIds.length === 0) {
            matrix = {identifier: this.getIdentifier()};
        } else {
            // get appropriate matrix given the map scale if possible
            if ("scaleDenominator" in this.matrixIds[0]) {
                // scale denominator calculation based on WMTS spec
                var denom = 
                    OpenLayers.METERS_PER_INCH * 
                    OpenLayers.INCHES_PER_UNIT[this.units] * 
                    this.getServerResolution() / 0.28E-3;
                var diff = Number.POSITIVE_INFINITY;
                var delta;
                for (var i=0, ii=this.matrixIds.length; i<ii; ++i) {
                    delta = Math.abs(1 - (this.matrixIds[i].scaleDenominator / denom));
                    if (delta < diff) {
                        diff = delta;
                        matrix = this.matrixIds[i];
                    }
                }
            } else {
                // fall back on zoom as index
                matrix = this.matrixIds[this.getIdentifier()];
            }
        }
        return matrix;
    },
    
    /** 
     * Method: getTileInfo
     * Get tile information for a given location at the current map resolution.
     *
     * Parameters:
     * loc - {<OpenLayers.LonLat} A location in map coordinates.
     *
     * Returns:
     * {Object} An object with "col", "row", "i", and "j" properties.  The col
     *     and row values are zero based tile indexes from the top left.  The
     *     i and j values are the number of pixels to the left and top 
     *     (respectively) of the given location within the target tile.
     */
    getTileInfo: function(loc) {
        var res = this.getServerResolution();
        
        var fx = (loc.lon - this.tileOrigin.lon) / (res * this.tileSize.w);
        var fy = (this.tileOrigin.lat - loc.lat) / (res * this.tileSize.h);

        var col = Math.floor(fx);
        var row = Math.floor(fy);
        
        return {
            col: col, 
            row: row,
            i: Math.floor((fx - col) * this.tileSize.w),
            j: Math.floor((fy - row) * this.tileSize.h)
        };
    },
    
    /**
     * Method: getURL
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>}
     * 
     * Returns:
     * {String} A URL for the tile corresponding to the given bounds.
     */
    getURL: function(bounds) {
        bounds = this.adjustBounds(bounds);
        var url = "";
        if (!this.tileFullExtent || this.tileFullExtent.intersectsBounds(bounds)) {            

            var center = bounds.getCenterLonLat();            
            var info = this.getTileInfo(center);
            var matrixId = this.matrix.identifier;
            var dimensions = this.dimensions, params;

            if (this.requestEncoding.toUpperCase() === "REST") {
                params = this.params;
                if (typeof this.url === "string" && this.url.indexOf("{") !== -1) {
                    var template = this.url.replace(/\{/g, "${");
                    var context = {
                        // spec does not make clear if capital S or not
                        style: this.style, Style: this.style,
                        TileMatrixSet: this.matrixSet,
                        TileMatrix: this.matrix.identifier,
                        TileRow: info.row,
                        TileCol: info.col
                    };
                    if (dimensions) {
                        var dimension, i;
                        for (i=dimensions.length-1; i>=0; --i) {
                            dimension = dimensions[i];
                            context[dimension] = params[dimension.toUpperCase()];
                        }
                    }
                    url = OpenLayers.String.format(template, context);
                } else {
                    // include 'version', 'layer' and 'style' in tile resource url
                    var path = this.version + "/" + this.layer + "/" + this.style + "/";

                    // append optional dimension path elements
                    if (dimensions) {
                        for (var i=0; i<dimensions.length; i++) {
                            if (params[dimensions[i]]) {
                                path = path + params[dimensions[i]] + "/";
                            }
                        }
                    }

                    // append other required path elements
                    path = path + this.matrixSet + "/" + this.matrix.identifier + 
                        "/" + info.row + "/" + info.col + "." + this.formatSuffix;

                    if (OpenLayers.Util.isArray(this.url)) {
                        url = this.selectUrl(path, this.url);
                    } else {
                        url = this.url;
                    }
                    if (!url.match(/\/$/)) {
                        url = url + "/";
                    }
                    url = url + path;
                }
            } else if (this.requestEncoding.toUpperCase() === "KVP") {

                // assemble all required parameters
                params = {
                    SERVICE: "WMTS",
                    REQUEST: "GetTile",
                    VERSION: this.version,
                    LAYER: this.layer,
                    STYLE: this.style,
                    TILEMATRIXSET: this.matrixSet,
                    TILEMATRIX: this.matrix.identifier,
                    TILEROW: info.row,
                    TILECOL: info.col,
                    FORMAT: this.format
                };
                url = OpenLayers.Layer.Grid.prototype.getFullRequestString.apply(this, [params]);

            }
        }
        return url;    
    },
    
    /**
     * APIMethod: mergeNewParams
     * Extend the existing layer <params> with new properties.  Tiles will be
     *     reloaded with updated params in the request.
     * 
     * Parameters:
     * newParams - {Object} Properties to extend to existing <params>.
     */
    mergeNewParams: function(newParams) {
        if (this.requestEncoding.toUpperCase() === "KVP") {
            return OpenLayers.Layer.Grid.prototype.mergeNewParams.apply(
                this, [OpenLayers.Util.upperCaseObject(newParams)]
            );
        }
    },

    CLASS_NAME: "OpenLayers.Layer.WMTS"
});
/* ======================================================================
    OpenLayers/Protocol/SOS/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol/SOS.js
 * @requires OpenLayers/Format/SOSGetFeatureOfInterest.js
 */

/**
 * Class: OpenLayers.Protocol.SOS.v1_0_0
 * An SOS v1.0.0 Protocol for vector layers.  Create a new instance with the
 *     <OpenLayers.Protocol.SOS.v1_0_0> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Protocol>
 */
 OpenLayers.Protocol.SOS.v1_0_0 = OpenLayers.Class(OpenLayers.Protocol, {

    /**
     * APIProperty: fois
     * {Array(String)} Array of features of interest (foi)
     */
    fois: null,

    /**
     * Property: formatOptions
     * {Object} Optional options for the format.  If a format is not provided,
     *     this property can be used to extend the default format options.
     */
    formatOptions: null,
   
    /**
     * Constructor: OpenLayers.Protocol.SOS
     * A class for giving layers an SOS protocol.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * url - {String} URL to send requests to (required).
     * fois - {Array} The features of interest (required).
     */
    initialize: function(options) {
        OpenLayers.Protocol.prototype.initialize.apply(this, [options]);
        if(!options.format) {
            this.format = new OpenLayers.Format.SOSGetFeatureOfInterest(
                this.formatOptions);
        }
    },
   
    /**
     * APIMethod: destroy
     * Clean up the protocol.
     */
    destroy: function() {
        if(this.options && !this.options.format) {
            this.format.destroy();
        }
        this.format = null;
        OpenLayers.Protocol.prototype.destroy.apply(this);
    },

    /**
     * APIMethod: read
     * Construct a request for reading new sensor positions. This is done by
     *     issuing one GetFeatureOfInterest request.
     */
    read: function(options) {
        options = OpenLayers.Util.extend({}, options);
        OpenLayers.Util.applyDefaults(options, this.options || {});
        var response = new OpenLayers.Protocol.Response({requestType: "read"});
        var format = this.format;
        var data = OpenLayers.Format.XML.prototype.write.apply(format,
            [format.writeNode("sos:GetFeatureOfInterest", {fois: this.fois})]
        );
        response.priv = OpenLayers.Request.POST({
            url: options.url,
            callback: this.createCallback(this.handleRead, response, options),
            data: data
        });
        return response;
    },
   
    /**
     * Method: handleRead
     * Deal with response from the read request.
     *
     * Parameters:
     * response - {<OpenLayers.Protocol.Response>} The response object to pass
     *     to the user callback.
     * options - {Object} The user options passed to the read call.
     */
    handleRead: function(response, options) {
        if(options.callback) {
            var request = response.priv;
            if(request.status >= 200 && request.status < 300) {
                // success
                response.features = this.parseFeatures(request);
                response.code = OpenLayers.Protocol.Response.SUCCESS;
            } else {
                // failure
                response.code = OpenLayers.Protocol.Response.FAILURE;
            }
            options.callback.call(options.scope, response);
        }
    },

    /**
     * Method: parseFeatures
     * Read HTTP response body and return features
     *
     * Parameters:
     * request - {XMLHttpRequest} The request object
     *
     * Returns:
     * {Array({<OpenLayers.Feature.Vector>})} Array of features
     */
    parseFeatures: function(request) {
        var doc = request.responseXML;
        if(!doc || !doc.documentElement) {
            doc = request.responseText;
        }
        if(!doc || doc.length <= 0) {
            return null;
        }
        return this.format.read(doc);
    },

    CLASS_NAME: "OpenLayers.Protocol.SOS.v1_0_0"
});
/* ======================================================================
    OpenLayers/Layer/KaMapCache.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */


/**
 * @requires OpenLayers/Layer/Grid.js
 * @requires OpenLayers/Layer/KaMap.js
 */

/**
 * Class: OpenLayers.Layer.KaMapCache
 * 
 * This class is designed to talk directly to a web-accessible ka-Map
 * cache generated by the precache2.php script.
 * 
 * To create a a new KaMapCache layer, you must indicate also the "i" parameter
 * (that will be used to calculate the file extension), and another special
 * parameter, object names "metaTileSize", with "h" (height) and "w" (width)
 * properties.
 * 
 *     // Create a new kaMapCache layer. 
 *     var kamap_base = new OpenLayers.Layer.KaMapCache(
 *         "Satellite",
 *         "http://www.example.org/web/acessible/cache",
 *         {g: "satellite", map: "world", i: 'png24', metaTileSize: {w: 5, h: 5} }
 *       );
 *    
 *     // Create an kaMapCache overlay layer (using "isBaseLayer: false"). 
 *     // Forces the output to be a "gif", using the "i" parameter.
 *     var kamap_overlay = new OpenLayers.Layer.KaMapCache(
 *         "Streets",
 *         "http://www.example.org/web/acessible/cache",
 *         {g: "streets", map: "world", i: "gif", metaTileSize: {w: 5, h: 5} },
 *         {isBaseLayer: false}
 *       );
 *
 * The cache URLs must look like: 
 *   var/cache/World/50000/Group_Name/def/t-440320/l20480
 * 
 * This means that the cache generated via tile.php will *not* work with
 *     this class, and should instead use the KaMap layer.
 *
 * More information is available in Ticket #1518.
 * 
 * Inherits from:
 *  - <OpenLayers.Layer.KaMap>
 *  - <OpenLayers.Layer.Grid>
 */
OpenLayers.Layer.KaMapCache = OpenLayers.Class(OpenLayers.Layer.KaMap, {

    /**
     * Constant: IMAGE_EXTENSIONS
     * {Object} Simple hash map to convert format to extension.
     */
    IMAGE_EXTENSIONS: {
        'jpeg': 'jpg',
        'gif' : 'gif',
        'png' : 'png',
        'png8' : 'png',
        'png24' : 'png',
        'dithered' : 'png'
    },
    
    /**
     * Constant: DEFAULT_FORMAT
     * {Object} Simple hash map to convert format to extension.
     */
    DEFAULT_FORMAT: 'jpeg',
    
    /**
     * Constructor: OpenLayers.Layer.KaMapCache
     * 
     * Parameters:
     * name - {String}
     * url - {String}
     * params - {Object} Parameters to be sent to the HTTP server in the
     *    query string for the tile. The format can be set via the 'i'
     *    parameter (defaults to jpg) , and the map should be set via 
     *    the 'map' parameter. It has been reported that ka-Map may behave
     *    inconsistently if your format parameter does not match the format
     *    parameter configured in your config.php. (See ticket #327 for more
     *    information.)
     * options - {Object} Additional options for the layer. Any of the 
     *     APIProperties listed on this layer, and any layer types it
     *     extends, can be overridden through the options parameter. 
     */
    initialize: function(name, url, params, options) {
        OpenLayers.Layer.KaMap.prototype.initialize.apply(this, arguments);
        this.extension = this.IMAGE_EXTENSIONS[this.params.i.toLowerCase() || this.DEFAULT_FORMAT];
    },

    /**
     * Method: getURL
     * 
     * Parameters:
     * bounds - {<OpenLayers.Bounds>} 
     * 
     * Returns:
     * {String} A string with the layer's url and parameters and also the 
     *          passed-in bounds and appropriate tile size specified as 
     *          parameters
     */
    getURL: function (bounds) {
        bounds = this.adjustBounds(bounds);
        var mapRes = this.map.getResolution();
        var scale = Math.round((this.map.getScale() * 10000)) / 10000;
        var pX = Math.round(bounds.left / mapRes);
        var pY = -Math.round(bounds.top / mapRes);

        var metaX = Math.floor(pX / this.tileSize.w / this.params.metaTileSize.w) * this.tileSize.w * this.params.metaTileSize.w;
        var metaY = Math.floor(pY / this.tileSize.h / this.params.metaTileSize.h) * this.tileSize.h * this.params.metaTileSize.h;
    
        var components = [
            "/",
            this.params.map,
            "/",
            scale,
            "/",
            this.params.g.replace(/\s/g, '_'),
            "/def/t", 
            metaY,
            "/l",
            metaX,
            "/t",
            pY,
            "l",
            pX,
            ".",
            this.extension
          ];

        var url = this.url;

        if (OpenLayers.Util.isArray(url)) {
            url = this.selectUrl(components.join(''), url);
        }
        return url + components.join("");
    },

    CLASS_NAME: "OpenLayers.Layer.KaMapCache"
});
/* ======================================================================
    OpenLayers/Protocol/WFS/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Protocol/WFS/v1.js
 * @requires OpenLayers/Format/WFST/v1_1_0.js
 */

/**
 * Class: OpenLayers.Protocol.WFS.v1_1_0
 * A WFS v1.1.0 protocol for vector layers.  Create a new instance with the
 *     <OpenLayers.Protocol.WFS.v1_1_0> constructor.
 *
 * Differences from the v1.0.0 protocol:
 *  - uses Filter Encoding 1.1.0 instead of 1.0.0
 *  - uses GML 3 instead of 2 if no format is provided
 *  
 * Inherits from:
 *  - <OpenLayers.Protocol.WFS.v1>
 */
OpenLayers.Protocol.WFS.v1_1_0 = OpenLayers.Class(OpenLayers.Protocol.WFS.v1, {
    
    /**
     * Property: version
     * {String} WFS version number.
     */
    version: "1.1.0",
    
    /**
     * Constructor: OpenLayers.Protocol.WFS.v1_1_0
     * A class for giving layers WFS v1.1.0 protocol.
     *
     * Parameters:
     * options - {Object} Optional object whose properties will be set on the
     *     instance.
     *
     * Valid options properties:
     * featureType - {String} Local (without prefix) feature typeName (required).
     * featureNS - {String} Feature namespace (optional).
     * featurePrefix - {String} Feature namespace alias (optional - only used
     *     if featureNS is provided).  Default is 'feature'.
     * geometryName - {String} Name of geometry attribute.  Default is 'the_geom'.
     * outputFormat - {String} Optional output format to use for WFS GetFeature
     *     requests. This can be any format advertized by the WFS's
     *     GetCapabilities response. If set, an appropriate readFormat also
     *     has to be provided, unless outputFormat is GML3, GML2 or JSON.
     * readFormat - {<OpenLayers.Format>} An appropriate format parser if
     *     outputFormat is none of GML3, GML2 or JSON.
     */
    initialize: function(options) {
        OpenLayers.Protocol.WFS.v1.prototype.initialize.apply(this, arguments);
        if (this.outputFormat && !this.readFormat) {
            if (this.outputFormat.toLowerCase() == "gml2") {
                this.readFormat = new OpenLayers.Format.GML.v2({
                    featureType: this.featureType,
                    featureNS: this.featureNS,
                    geometryName: this.geometryName
                });
            } else if (this.outputFormat.toLowerCase() == "json") {
                this.readFormat = new OpenLayers.Format.GeoJSON();
            }
        }
    },
   
    CLASS_NAME: "OpenLayers.Protocol.WFS.v1_1_0"
});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1_1_1.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities/v1_1.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities/v1_1_1
 * Read WMS Capabilities version 1.1.1.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMSCapabilities.v1_1>
 */
OpenLayers.Format.WMSCapabilities.v1_1_1 = OpenLayers.Class(
    OpenLayers.Format.WMSCapabilities.v1_1, {
    
    /**
     * Property: version
     * {String} The specific parser version.
     */
    version: "1.1.1",
    
    /**
     * Constructor: OpenLayers.Format.WMSCapabilities.v1_1_1
     * Create a new parser for WMS capabilities version 1.1.1.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wms": OpenLayers.Util.applyDefaults({
            "SRS": function(node, obj) {
                obj.srs[this.getChildValue(node)] = true;
            }
        }, OpenLayers.Format.WMSCapabilities.v1_1.prototype.readers["wms"])
    },

    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_1_1" 

});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1_1_1_WMSC.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities/v1_1_1.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities/v1_1_1_WMSC
 * Read WMS-C Capabilities version 1.1.1.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMSCapabilities.v1_1_1>
 */
OpenLayers.Format.WMSCapabilities.v1_1_1_WMSC = OpenLayers.Class(
    OpenLayers.Format.WMSCapabilities.v1_1_1, {
    
    /**
     * Property: version
     * {String} The specific parser version.
     */
    version: "1.1.1",
    
    /**
     * Property: profile
     * {String} The specific profile
     */
    profile: "WMSC",
    
    /**
     * Constructor: OpenLayers.Format.WMSCapabilities.v1_1_1
     * Create a new parser for WMS-C capabilities version 1.1.1.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wms": OpenLayers.Util.applyDefaults({
            "VendorSpecificCapabilities": function(node, obj) {
                obj.vendorSpecific = {tileSets: []};
                this.readChildNodes(node, obj.vendorSpecific);
            },
            "TileSet": function(node, vendorSpecific) {
                var tileset = {srs: {}, bbox: {}, resolutions: []};
                this.readChildNodes(node, tileset);
                vendorSpecific.tileSets.push(tileset);
            },
            "Resolutions": function(node, tileset) {
                var res = this.getChildValue(node).split(" ");
                for (var i=0, len=res.length; i<len; i++) {
                    if (res[i] != "") {
                        tileset.resolutions.push(parseFloat(res[i]));
                    }
                }
            },
            "Width": function(node, tileset) {
                tileset.width = parseInt(this.getChildValue(node));
            },
            "Height": function(node, tileset) {
                tileset.height = parseInt(this.getChildValue(node));
            },
            "Layers": function(node, tileset) {
                tileset.layers = this.getChildValue(node);
            },
            "Styles": function(node, tileset) {
                tileset.styles = this.getChildValue(node);
            }
        }, OpenLayers.Format.WMSCapabilities.v1_1_1.prototype.readers["wms"])
    },

    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_1_1_WMSC" 

});
/* ======================================================================
    OpenLayers/Format/WMSCapabilities/v1_1_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMSCapabilities/v1_1.js
 */

/**
 * Class: OpenLayers.Format.WMSCapabilities/v1_1_0
 * Read WMS Capabilities version 1.1.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMSCapabilities.v1_1>
 */
OpenLayers.Format.WMSCapabilities.v1_1_0 = OpenLayers.Class(
    OpenLayers.Format.WMSCapabilities.v1_1, {
    
    /**
     * Property: version
     * {String} The specific parser version.
     */
    version: "1.1.0",
    
    /**
     * Constructor: OpenLayers.Format.WMSCapabilities.v1_1_0
     * Create a new parser for WMS capabilities version 1.1.0.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {
        "wms": OpenLayers.Util.applyDefaults({
            "SRS": function(node, obj) {
                var srs = this.getChildValue(node);
                var values = srs.split(/ +/);
                for (var i=0, len=values.length; i<len; i++) {
                    obj.srs[values[i]] = true;
                }
            }
        }, OpenLayers.Format.WMSCapabilities.v1_1.prototype.readers["wms"])
    },

    CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_1_0" 

});
/* ======================================================================
    OpenLayers/Control/LayerSwitcher.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/** 
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Lang.js
 * @requires OpenLayers/Console.js
 * @requires OpenLayers/Events/buttonclick.js
 */

/**
 * Class: OpenLayers.Control.LayerSwitcher
 * The LayerSwitcher control displays a table of contents for the map. This 
 * allows the user interface to switch between BaseLasyers and to show or hide
 * Overlays. By default the switcher is shown minimized on the right edge of 
 * the map, the user may expand it by clicking on the handle.
 *
 * To create the LayerSwitcher outside of the map, pass the Id of a html div 
 * as the first argument to the constructor.
 * 
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.LayerSwitcher = 
  OpenLayers.Class(OpenLayers.Control, {

    /**
     * APIProperty: roundedCorner
     * {Boolean} If true the Rico library is used for rounding the corners
     *     of the layer switcher div, defaults to false. *Deprecated*. Use
     *     CSS3's border-radius instead. If this option is set to true the
     *     Rico/Corner.js script must be loaded in the page, and therefore
     *     listed in the build profile.
     *
     */
    roundedCorner: false,

    /**  
     * APIProperty: roundedCornerColor
     * {String} The color of the rounded corners, only applies if roundedCorner
     *     is true, defaults to "darkblue".
     */
    roundedCornerColor: "darkblue",
    
    /**  
     * Property: layerStates 
     * {Array(Object)} Basically a copy of the "state" of the map's layers 
     *     the last time the control was drawn. We have this in order to avoid
     *     unnecessarily redrawing the control.
     */
    layerStates: null,
    

  // DOM Elements
  
    /**
     * Property: layersDiv
     * {DOMElement} 
     */
    layersDiv: null,
    
    /** 
     * Property: baseLayersDiv
     * {DOMElement}
     */
    baseLayersDiv: null,

    /** 
     * Property: baseLayers
     * {Array(Object)}
     */
    baseLayers: null,
    
    
    /** 
     * Property: dataLbl
     * {DOMElement} 
     */
    dataLbl: null,
    
    /** 
     * Property: dataLayersDiv
     * {DOMElement} 
     */
    dataLayersDiv: null,

    /** 
     * Property: dataLayers
     * {Array(Object)} 
     */
    dataLayers: null,


    /** 
     * Property: minimizeDiv
     * {DOMElement} 
     */
    minimizeDiv: null,

    /** 
     * Property: maximizeDiv
     * {DOMElement} 
     */
    maximizeDiv: null,
    
    /**
     * APIProperty: ascending
     * {Boolean} 
     */
    ascending: true,
 
    /**
     * Constructor: OpenLayers.Control.LayerSwitcher
     * 
     * Parameters:
     * options - {Object}
     */
    initialize: function(options) {
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
        this.layerStates = [];
        
        if(this.roundedCorner) {
            OpenLayers.Console.warn('roundedCorner option is deprecated');
        }
    },

    /**
     * APIMethod: destroy 
     */    
    destroy: function() {
        
        //clear out layers info and unregister their events 
        this.clearLayersArray("base");
        this.clearLayersArray("data");
        
        this.map.events.un({
            buttonclick: this.onButtonClick,
            addlayer: this.redraw,
            changelayer: this.redraw,
            removelayer: this.redraw,
            changebaselayer: this.redraw,
            scope: this
        });
        this.events.unregister("buttonclick", this, this.onButtonClick);
        
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },

    /** 
     * Method: setMap
     *
     * Properties:
     * map - {<OpenLayers.Map>} 
     */
    setMap: function(map) {
        OpenLayers.Control.prototype.setMap.apply(this, arguments);

        this.map.events.on({
            addlayer: this.redraw,
            changelayer: this.redraw,
            removelayer: this.redraw,
            changebaselayer: this.redraw,
            scope: this
        });
        if (this.outsideViewport) {
            this.events.attachToElement(this.div);
            this.events.register("buttonclick", this, this.onButtonClick);
        } else {
            this.map.events.register("buttonclick", this, this.onButtonClick);
        }
    },

    /**
     * Method: draw
     *
     * Returns:
     * {DOMElement} A reference to the DIV DOMElement containing the 
     *     switcher tabs.
     */  
    draw: function() {
        OpenLayers.Control.prototype.draw.apply(this);

        // create layout divs
        this.loadContents();

        // set mode to minimize
        if(!this.outsideViewport) {
            this.minimizeControl();
        }

        // populate div with current info
        this.redraw();    

        return this.div;
    },

    /**
     * Method: onButtonClick
     *
     * Parameters:
     * evt - {Event}
     */
    onButtonClick: function(evt) {
        var button = evt.buttonElement;
        if (button === this.minimizeDiv) {
            this.minimizeControl();
        } else if (button === this.maximizeDiv) {
            this.maximizeControl();
        } else if (button._layerSwitcher === this.id) {
            if (button["for"]) {
                button = document.getElementById(button["for"]);
            }
            if (!button.disabled) {
                if (button.type == "radio") {
                    button.checked = true;
                    this.map.setBaseLayer(this.map.getLayer(button._layer));
                } else {
                    button.checked = !button.checked;
                    this.updateMap();
                }
            }
        }
    },

    /** 
     * Method: clearLayersArray
     * User specifies either "base" or "data". we then clear all the
     *     corresponding listeners, the div, and reinitialize a new array.
     * 
     * Parameters:
     * layersType - {String}  
     */
    clearLayersArray: function(layersType) {
        this[layersType + "LayersDiv"].innerHTML = "";
        this[layersType + "Layers"] = [];
    },


    /**
     * Method: checkRedraw
     * Checks if the layer state has changed since the last redraw() call.
     * 
     * Returns:
     * {Boolean} The layer state changed since the last redraw() call. 
     */
    checkRedraw: function() {
        var redraw = false;
        if ( !this.layerStates.length ||
             (this.map.layers.length != this.layerStates.length) ) {
            redraw = true;
        } else {
            for (var i=0, len=this.layerStates.length; i<len; i++) {
                var layerState = this.layerStates[i];
                var layer = this.map.layers[i];
                if ( (layerState.name != layer.name) || 
                     (layerState.inRange != layer.inRange) || 
                     (layerState.id != layer.id) || 
                     (layerState.visibility != layer.visibility) ) {
                    redraw = true;
                    break;
                }    
            }
        }    
        return redraw;
    },
    
    /** 
     * Method: redraw
     * Goes through and takes the current state of the Map and rebuilds the
     *     control to display that state. Groups base layers into a 
     *     radio-button group and lists each data layer with a checkbox.
     *
     * Returns: 
     * {DOMElement} A reference to the DIV DOMElement containing the control
     */  
    redraw: function() {
        //if the state hasn't changed since last redraw, no need 
        // to do anything. Just return the existing div.
        if (!this.checkRedraw()) { 
            return this.div; 
        } 

        //clear out previous layers 
        this.clearLayersArray("base");
        this.clearLayersArray("data");
        
        var containsOverlays = false;
        var containsBaseLayers = false;
        
        // Save state -- for checking layer if the map state changed.
        // We save this before redrawing, because in the process of redrawing
        // we will trigger more visibility changes, and we want to not redraw
        // and enter an infinite loop.
        var len = this.map.layers.length;
        this.layerStates = new Array(len);
        for (var i=0; i <len; i++) {
            var layer = this.map.layers[i];
            this.layerStates[i] = {
                'name': layer.name, 
                'visibility': layer.visibility,
                'inRange': layer.inRange,
                'id': layer.id
            };
        }    

        var layers = this.map.layers.slice();
        if (!this.ascending) { layers.reverse(); }
        for(var i=0, len=layers.length; i<len; i++) {
            var layer = layers[i];
            var baseLayer = layer.isBaseLayer;

            if (layer.displayInLayerSwitcher) {

                if (baseLayer) {
                    containsBaseLayers = true;
                } else {
                    containsOverlays = true;
                }    

                // only check a baselayer if it is *the* baselayer, check data
                //  layers if they are visible
                var checked = (baseLayer) ? (layer == this.map.baseLayer)
                                          : layer.getVisibility();
    
                // create input element
                var inputElem = document.createElement("input");
                inputElem.id = this.id + "_input_" + layer.name;
                inputElem.name = (baseLayer) ? this.id + "_baseLayers" : layer.name;
                inputElem.type = (baseLayer) ? "radio" : "checkbox";
                inputElem.value = layer.name;
                inputElem.checked = checked;
                inputElem.defaultChecked = checked;
                inputElem.className = "olButton";
                inputElem._layer = layer.id;
                inputElem._layerSwitcher = this.id;

                if (!baseLayer && !layer.inRange) {
                    inputElem.disabled = true;
                }
                
                // create span
                var labelSpan = document.createElement("label");
                labelSpan["for"] = inputElem.id;
                OpenLayers.Element.addClass(labelSpan, "labelSpan olButton");
                labelSpan._layer = layer.id;
                labelSpan._layerSwitcher = this.id;
                if (!baseLayer && !layer.inRange) {
                    labelSpan.style.color = "gray";
                }
                labelSpan.innerHTML = layer.name;
                labelSpan.style.verticalAlign = (baseLayer) ? "bottom" 
                                                            : "baseline";
                // create line break
                var br = document.createElement("br");
    
                
                var groupArray = (baseLayer) ? this.baseLayers
                                             : this.dataLayers;
                groupArray.push({
                    'layer': layer,
                    'inputElem': inputElem,
                    'labelSpan': labelSpan
                });
                                                     
    
                var groupDiv = (baseLayer) ? this.baseLayersDiv
                                           : this.dataLayersDiv;
                groupDiv.appendChild(inputElem);
                groupDiv.appendChild(labelSpan);
                groupDiv.appendChild(br);
            }
        }

        // if no overlays, dont display the overlay label
        this.dataLbl.style.display = (containsOverlays) ? "" : "none";        
        
        // if no baselayers, dont display the baselayer label
        this.baseLbl.style.display = (containsBaseLayers) ? "" : "none";        

        return this.div;
    },

    /** 
     * Method: updateMap
     * Cycles through the loaded data and base layer input arrays and makes
     *     the necessary calls to the Map object such that that the map's 
     *     visual state corresponds to what the user has selected in 
     *     the control.
     */
    updateMap: function() {

        // set the newly selected base layer        
        for(var i=0, len=this.baseLayers.length; i<len; i++) {
            var layerEntry = this.baseLayers[i];
            if (layerEntry.inputElem.checked) {
                this.map.setBaseLayer(layerEntry.layer, false);
            }
        }

        // set the correct visibilities for the overlays
        for(var i=0, len=this.dataLayers.length; i<len; i++) {
            var layerEntry = this.dataLayers[i];   
            layerEntry.layer.setVisibility(layerEntry.inputElem.checked);
        }

    },

    /** 
     * Method: maximizeControl
     * Set up the labels and divs for the control
     * 
     * Parameters:
     * e - {Event} 
     */
    maximizeControl: function(e) {

        // set the div's width and height to empty values, so
        // the div dimensions can be controlled by CSS
        this.div.style.width = "";
        this.div.style.height = "";

        this.showControls(false);

        if (e != null) {
            OpenLayers.Event.stop(e);                                            
        }
    },
    
    /** 
     * Method: minimizeControl
     * Hide all the contents of the control, shrink the size, 
     *     add the maximize icon
     *
     * Parameters:
     * e - {Event} 
     */
    minimizeControl: function(e) {

        // to minimize the control we set its div's width
        // and height to 0px, we cannot just set "display"
        // to "none" because it would hide the maximize
        // div
        this.div.style.width = "0px";
        this.div.style.height = "0px";

        this.showControls(true);

        if (e != null) {
            OpenLayers.Event.stop(e);                                            
        }
    },

    /**
     * Method: showControls
     * Hide/Show all LayerSwitcher controls depending on whether we are
     *     minimized or not
     * 
     * Parameters:
     * minimize - {Boolean}
     */
    showControls: function(minimize) {

        this.maximizeDiv.style.display = minimize ? "" : "none";
        this.minimizeDiv.style.display = minimize ? "none" : "";

        this.layersDiv.style.display = minimize ? "none" : "";
    },
    
    /** 
     * Method: loadContents
     * Set up the labels and divs for the control
     */
    loadContents: function() {

        // layers list div        
        this.layersDiv = document.createElement("div");
        this.layersDiv.id = this.id + "_layersDiv";
        OpenLayers.Element.addClass(this.layersDiv, "layersDiv");

        this.baseLbl = document.createElement("div");
        this.baseLbl.innerHTML = OpenLayers.i18n("Base Layer");
        OpenLayers.Element.addClass(this.baseLbl, "baseLbl");
        
        this.baseLayersDiv = document.createElement("div");
        OpenLayers.Element.addClass(this.baseLayersDiv, "baseLayersDiv");

        this.dataLbl = document.createElement("div");
        this.dataLbl.innerHTML = OpenLayers.i18n("Overlays");
        OpenLayers.Element.addClass(this.dataLbl, "dataLbl");
        
        this.dataLayersDiv = document.createElement("div");
        OpenLayers.Element.addClass(this.dataLayersDiv, "dataLayersDiv");

        if (this.ascending) {
            this.layersDiv.appendChild(this.baseLbl);
            this.layersDiv.appendChild(this.baseLayersDiv);
            this.layersDiv.appendChild(this.dataLbl);
            this.layersDiv.appendChild(this.dataLayersDiv);
        } else {
            this.layersDiv.appendChild(this.dataLbl);
            this.layersDiv.appendChild(this.dataLayersDiv);
            this.layersDiv.appendChild(this.baseLbl);
            this.layersDiv.appendChild(this.baseLayersDiv);
        }    
 
        this.div.appendChild(this.layersDiv);

        if(this.roundedCorner) {
            OpenLayers.Rico.Corner.round(this.div, {
                corners: "tl bl",
                bgColor: "transparent",
                color: this.roundedCornerColor,
                blend: false
            });
            OpenLayers.Rico.Corner.changeOpacity(this.layersDiv, 0.75);
        }

        // maximize button div
        var img = OpenLayers.Util.getImageLocation('layer-switcher-maximize.png');
        this.maximizeDiv = OpenLayers.Util.createAlphaImageDiv(
                                    "OpenLayers_Control_MaximizeDiv", 
                                    null, 
                                    null, 
                                    img, 
                                    "absolute");
        OpenLayers.Element.addClass(this.maximizeDiv, "maximizeDiv olButton");
        this.maximizeDiv.style.display = "none";
        
        this.div.appendChild(this.maximizeDiv);

        // minimize button div
        var img = OpenLayers.Util.getImageLocation('layer-switcher-minimize.png');
        this.minimizeDiv = OpenLayers.Util.createAlphaImageDiv(
                                    "OpenLayers_Control_MinimizeDiv", 
                                    null, 
                                    null, 
                                    img, 
                                    "absolute");
        OpenLayers.Element.addClass(this.minimizeDiv, "minimizeDiv olButton");
        this.minimizeDiv.style.display = "none";

        this.div.appendChild(this.minimizeDiv);
    },
    
    CLASS_NAME: "OpenLayers.Control.LayerSwitcher"
});
/* ======================================================================
    OpenLayers/Format/Atom.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/XML.js
 * @requires OpenLayers/Format/GML/v3.js
 * @requires OpenLayers/Feature/Vector.js
 */

/**
 * Class: OpenLayers.Format.Atom
 * Read/write Atom feeds. Create a new instance with the
 *     <OpenLayers.Format.AtomFeed> constructor.
 *
 * Inherits from:
 *  - <OpenLayers.Format.XML>
 */
OpenLayers.Format.Atom = OpenLayers.Class(OpenLayers.Format.XML, {
    
    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.  Properties
     *     of this object should not be set individually.  Read-only.  All
     *     XML subclasses should have their own namespaces object.  Use
     *     <setNamespace> to add or set a namespace alias after construction.
     */
    namespaces: {
        atom: "http://www.w3.org/2005/Atom",
        georss: "http://www.georss.org/georss"
    },
    
    /**
     * APIProperty: feedTitle
     * {String} Atom feed elements require a title.  Default is "untitled".
     */
    feedTitle: "untitled",

    /**
     * APIProperty: defaultEntryTitle
     * {String} Atom entry elements require a title.  In cases where one is
     *     not provided in the feature attributes, this will be used.  Default
     *     is "untitled".
     */
    defaultEntryTitle: "untitled",

    /**
     * Property: gmlParse
     * {Object} GML Format object for parsing features
     * Non-API and only created if necessary
     */
    gmlParser: null,
    
    /**
     * APIProperty: xy
     * {Boolean} Order of the GML coordinate: true:(x,y) or false:(y,x)
     * For GeoRSS the default is (y,x), therefore: false
     */
    xy: false,
    
    /**
     * Constructor: OpenLayers.Format.AtomEntry
     * Create a new parser for Atom.
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    
    /**
     * APIMethod: read
     * Return a list of features from an Atom feed or entry document.
     
     * Parameters:
     * doc - {Element} or {String}
     *
     * Returns:
     * Array({<OpenLayers.Feature.Vector>})
     */
    read: function(doc) {
        if (typeof doc == "string") {
            doc = OpenLayers.Format.XML.prototype.read.apply(this, [doc]);
        }
        return this.parseFeatures(doc);
    },
    
    /**
     * APIMethod: write
     * Serialize or more feature nodes to Atom documents.
     *
     * Parameters:
     * features - {<OpenLayers.Feature.Vector>} or Array({<OpenLayers.Feature.Vector>})
     *
     * Returns:
     * {String} an Atom entry document if passed one feature node, or a feed
     * document if passed an array of feature nodes.
     */
    write: function(features) {
        var doc;
        if (OpenLayers.Util.isArray(features)) {
            doc = this.createElementNSPlus("atom:feed");
            doc.appendChild(
                this.createElementNSPlus("atom:title", {
                    value: this.feedTitle
                })
            );
            for (var i=0, ii=features.length; i<ii; i++) {
                doc.appendChild(this.buildEntryNode(features[i]));
            }
        }
        else {
            doc = this.buildEntryNode(features);
        }
        return OpenLayers.Format.XML.prototype.write.apply(this, [doc]);
    },
    
    /**
     * Method: buildContentNode
     *
     * Parameters:
     * content - {Object}
     *
     * Returns:
     * {DOMElement} an Atom content node.
     *
     * TODO: types other than text.
     */
    buildContentNode: function(content) {
        var node = this.createElementNSPlus("atom:content", {
            attributes: {
                type: content.type || null
            }
        });
        if (content.src) {
            node.setAttribute("src", content.src);
        } else {
            if (content.type == "text" || content.type == null) {
                node.appendChild(
                    this.createTextNode(content.value)
                );
            } else if (content.type == "html") {
                if (typeof content.value != "string") {
                    throw "HTML content must be in form of an escaped string";
                }
                node.appendChild(
                    this.createTextNode(content.value)
                );
            } else if (content.type == "xhtml") {
                node.appendChild(content.value);
            } else if (content.type == "xhtml" ||
                           content.type.match(/(\+|\/)xml$/)) {
                node.appendChild(content.value);
            }
            else { // MUST be a valid Base64 encoding
                node.appendChild(
                    this.createTextNode(content.value)
                );
            }
        }
        return node;
    },
    
    /**
     * Method: buildEntryNode
     * Build an Atom entry node from a feature object.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>}
     *
     * Returns:
     * {DOMElement} an Atom entry node.
     *
     * These entries are geared for publication using AtomPub.
     *
     * TODO: support extension elements
     */
    buildEntryNode: function(feature) {
        var attrib = feature.attributes;
        var atomAttrib = attrib.atom || {};
        var entryNode = this.createElementNSPlus("atom:entry");
        
        // atom:author
        if (atomAttrib.authors) {
            var authors = OpenLayers.Util.isArray(atomAttrib.authors) ?
                atomAttrib.authors : [atomAttrib.authors];
            for (var i=0, ii=authors.length; i<ii; i++) {
                entryNode.appendChild(
                    this.buildPersonConstructNode(
                        "author", authors[i]
                    )
                );
            }
        }
        
        // atom:category
        if (atomAttrib.categories) {
            var categories = OpenLayers.Util.isArray(atomAttrib.categories) ?
                atomAttrib.categories : [atomAttrib.categories];
            var category;
            for (var i=0, ii=categories.length; i<ii; i++) {
                category = categories[i];
                entryNode.appendChild(
                    this.createElementNSPlus("atom:category", {
                        attributes: {
                            term: category.term,
                            scheme: category.scheme || null,
                            label: category.label || null
                        }
                    })
                );
            }
        }
        
        // atom:content
        if (atomAttrib.content) {
            entryNode.appendChild(this.buildContentNode(atomAttrib.content));
        }
        
        // atom:contributor
        if (atomAttrib.contributors) {
            var contributors = OpenLayers.Util.isArray(atomAttrib.contributors) ?
                atomAttrib.contributors : [atomAttrib.contributors];
            for (var i=0, ii=contributors.length; i<ii; i++) {
                entryNode.appendChild(
                    this.buildPersonConstructNode(
                        "contributor",
                        contributors[i]
                        )
                    );
            }
        }
        
        // atom:id
        if (feature.fid) {
            entryNode.appendChild(
                this.createElementNSPlus("atom:id", {
                    value: feature.fid
                })
            );
        }
        
        // atom:link
        if (atomAttrib.links) {
            var links = OpenLayers.Util.isArray(atomAttrib.links) ?
                atomAttrib.links : [atomAttrib.links];
            var link;
            for (var i=0, ii=links.length; i<ii; i++) {
                link = links[i];
                entryNode.appendChild(
                    this.createElementNSPlus("atom:link", {
                        attributes: {
                            href: link.href,
                            rel: link.rel || null,
                            type: link.type || null,
                            hreflang: link.hreflang || null,
                            title: link.title || null,
                            length: link.length || null
                        }
                    })
                );
            }
        }
        
        // atom:published
        if (atomAttrib.published) {
            entryNode.appendChild(
                this.createElementNSPlus("atom:published", {
                    value: atomAttrib.published
                })
            );
        }
        
        // atom:rights
        if (atomAttrib.rights) {
            entryNode.appendChild(
                this.createElementNSPlus("atom:rights", {
                    value: atomAttrib.rights
                })
            );
        }
        
        // atom:source not implemented
        
        // atom:summary
        if (atomAttrib.summary || attrib.description) {
            entryNode.appendChild(
                this.createElementNSPlus("atom:summary", {
                    value: atomAttrib.summary || attrib.description
                })
            );
        }
        
        // atom:title
        entryNode.appendChild(
            this.createElementNSPlus("atom:title", {
                value: atomAttrib.title || attrib.title || this.defaultEntryTitle
            })
        );
        
        // atom:updated
        if (atomAttrib.updated) {
            entryNode.appendChild(
                this.createElementNSPlus("atom:updated", {
                    value: atomAttrib.updated
                })
            );
        }
        
        // georss:where
        if (feature.geometry) {
            var whereNode = this.createElementNSPlus("georss:where");
            whereNode.appendChild(
                this.buildGeometryNode(feature.geometry)
            );
            entryNode.appendChild(whereNode);
        }
        
        return entryNode;
    },
    
    /**
     * Method: initGmlParser
     * Creates a GML parser.
     */
    initGmlParser: function() {
        this.gmlParser = new OpenLayers.Format.GML.v3({
            xy: this.xy,
            featureNS: "http://example.com#feature",
            internalProjection: this.internalProjection,
            externalProjection: this.externalProjection
        });
    },
    
    /**
     * Method: buildGeometryNode
     * builds a GeoRSS node with a given geometry
     *
     * Parameters:
     * geometry - {<OpenLayers.Geometry>}
     *
     * Returns:
     * {DOMElement} A gml node.
     */
    buildGeometryNode: function(geometry) {
        if (!this.gmlParser) {
            this.initGmlParser();
        }
        var node = this.gmlParser.writeNode("feature:_geometry", geometry);
        return node.firstChild;
    },
    
    /**
     * Method: buildPersonConstructNode
     *
     * Parameters:
     * name - {String}
     * value - {Object}
     *
     * Returns:
     * {DOMElement} an Atom person construct node.
     *
     * Example:
     * >>> buildPersonConstructNode("author", {name: "John Smith"})
     * {<author><name>John Smith</name></author>}
     *
     * TODO: how to specify extension elements? Add to the oNames array?
     */
    buildPersonConstructNode: function(name, value) {
        var oNames = ["uri", "email"];
        var personNode = this.createElementNSPlus("atom:" + name);
        personNode.appendChild(
            this.createElementNSPlus("atom:name", {
                value: value.name
            })
        );
        for (var i=0, ii=oNames.length; i<ii; i++) {
            if (value[oNames[i]]) {
                personNode.appendChild(
                    this.createElementNSPlus("atom:" + oNames[i], {
                        value: value[oNames[i]]
                    })
                );
            }
        }
        return personNode;
    },
    
    /**
     * Method: getFirstChildValue
     *
     * Parameters:
     * node - {DOMElement}
     * nsuri - {String} Child node namespace uri ("*" for any).
     * name - {String} Child node name.
     * def - {String} Optional string default to return if no child found.
     *
     * Returns:
     * {String} The value of the first child with the given tag name.  Returns
     *     default value or empty string if none found.
     */
    getFirstChildValue: function(node, nsuri, name, def) {
        var value;
        var nodes = this.getElementsByTagNameNS(node, nsuri, name);
        if (nodes && nodes.length > 0) {
            value = this.getChildValue(nodes[0], def);
        } else {
            value = def;
        }
        return value;
    },
    
    /**
     * Method: parseFeature
     * Parse feature from an Atom entry node..
     *
     * Parameters:
     * node - {DOMElement} An Atom entry or feed node.
     *
     * Returns:
     * {<OpenLayers.Feature.Vector>}
     */
    parseFeature: function(node) {
        var atomAttrib = {};
        var value = null;
        var nodes = null;
        var attval = null;
        var atomns = this.namespaces.atom;
        
        // atomAuthor*
        this.parsePersonConstructs(node, "author", atomAttrib);
        
        // atomCategory*
        nodes = this.getElementsByTagNameNS(node, atomns, "category");
        if (nodes.length > 0) {
            atomAttrib.categories = [];
        }
        for (var i=0, ii=nodes.length; i<ii; i++) {
            value = {};
            value.term = nodes[i].getAttribute("term");
            attval = nodes[i].getAttribute("scheme");
            if (attval) { value.scheme = attval; }
            attval = nodes[i].getAttribute("label");
            if (attval) { value.label = attval; }
            atomAttrib.categories.push(value);
        }
        
        // atomContent?
        nodes = this.getElementsByTagNameNS(node, atomns, "content");
        if (nodes.length > 0) {
            value = {};
            attval = nodes[0].getAttribute("type");
            if (attval) {
                value.type = attval;
            }
            attval = nodes[0].getAttribute("src");
            if (attval) {
                value.src = attval;
            } else {
                if (value.type == "text" || 
                    value.type == "html" || 
                    value.type == null ) {
                    value.value = this.getFirstChildValue(
                                        node,
                                        atomns,
                                        "content",
                                        null
                                        );
                } else if (value.type == "xhtml" ||
                           value.type.match(/(\+|\/)xml$/)) {
                    value.value = this.getChildEl(nodes[0]);
                } else { // MUST be base64 encoded
                    value.value = this.getFirstChildValue(
                                        node,
                                        atomns,
                                        "content",
                                        null
                                        );
                }
                atomAttrib.content = value;
            }
        }
        
        // atomContributor*
        this.parsePersonConstructs(node, "contributor", atomAttrib);
        
        // atomId
        atomAttrib.id = this.getFirstChildValue(node, atomns, "id", null);
        
        // atomLink*
        nodes = this.getElementsByTagNameNS(node, atomns, "link");
        if (nodes.length > 0) {
            atomAttrib.links = new Array(nodes.length);
        }
        var oAtts = ["rel", "type", "hreflang", "title", "length"];
        for (var i=0, ii=nodes.length; i<ii; i++) {
            value = {};
            value.href = nodes[i].getAttribute("href");
            for (var j=0, jj=oAtts.length; j<jj; j++) {
                attval = nodes[i].getAttribute(oAtts[j]);
                if (attval) {
                    value[oAtts[j]] = attval;
                }
            }
            atomAttrib.links[i] = value;
        }
        
        // atomPublished?
        value = this.getFirstChildValue(node, atomns, "published", null);
        if (value) {
            atomAttrib.published = value;
        }
        
        // atomRights?
        value = this.getFirstChildValue(node, atomns, "rights", null);
        if (value) {
            atomAttrib.rights = value;
        }
        
        // atomSource? -- not implemented
        
        // atomSummary?
        value = this.getFirstChildValue(node, atomns, "summary", null);
        if (value) {
            atomAttrib.summary = value;
        }
        
        // atomTitle
        atomAttrib.title = this.getFirstChildValue(
                                node, atomns, "title", null
                                );
        
        // atomUpdated
        atomAttrib.updated = this.getFirstChildValue(
                                node, atomns, "updated", null
                                );
        
        var featureAttrib = {
            title: atomAttrib.title,
            description: atomAttrib.summary,
            atom: atomAttrib
        };
        var geometry = this.parseLocations(node)[0];
        var feature = new OpenLayers.Feature.Vector(geometry, featureAttrib);
        feature.fid = atomAttrib.id;
        return feature;
    },
    
    /**
     * Method: parseFeatures
     * Return features from an Atom entry or feed.
     *
     * Parameters:
     * node - {DOMElement} An Atom entry or feed node.
     *
     * Returns:
     * Array({<OpenLayers.Feature.Vector>})
     */
    parseFeatures: function(node) {
        var features = [];
        var entries = this.getElementsByTagNameNS(
            node, this.namespaces.atom, "entry"
        );
        if (entries.length == 0) {
            entries = [node];
        }
        for (var i=0, ii=entries.length; i<ii; i++) {
            features.push(this.parseFeature(entries[i]));
        }
        return features;
    },
    
    /**
     * Method: parseLocations
     * Parse the locations from an Atom entry or feed.
     *
     * Parameters:
     * node - {DOMElement} An Atom entry or feed node.
     *
     * Returns:
     * Array({<OpenLayers.Geometry>})
     */
    parseLocations: function(node) {
        var georssns = this.namespaces.georss;

        var locations = {components: []};
        var where = this.getElementsByTagNameNS(node, georssns, "where");
        if (where && where.length > 0) {
            if (!this.gmlParser) {
                this.initGmlParser();
            }
            for (var i=0, ii=where.length; i<ii; i++) {
                this.gmlParser.readChildNodes(where[i], locations);
            }
        }
        
        var components = locations.components;
        var point = this.getElementsByTagNameNS(node, georssns, "point");
        if (point && point.length > 0) {
            for (var i=0, ii=point.length; i<ii; i++) {
                var xy = OpenLayers.String.trim(
                            point[i].firstChild.nodeValue
                            ).split(/\s+/);
                if (xy.length !=2) {
                    xy = OpenLayers.String.trim(
                                point[i].firstChild.nodeValue
                                ).split(/\s*,\s*/);
                }
                components.push(new OpenLayers.Geometry.Point(xy[1], xy[0]));
            }
        }

        var line = this.getElementsByTagNameNS(node, georssns, "line");
        if (line && line.length > 0) {
            var coords;
            var p;
            var points;
            for (var i=0, ii=line.length; i<ii; i++) {
                coords = OpenLayers.String.trim(
                                line[i].firstChild.nodeValue
                                ).split(/\s+/);
                points = [];
                for (var j=0, jj=coords.length; j<jj; j+=2) {
                    p = new OpenLayers.Geometry.Point(coords[j+1], coords[j]);
                    points.push(p);
                }
                components.push(
                    new OpenLayers.Geometry.LineString(points)
                );
            }
        }        

        var polygon = this.getElementsByTagNameNS(node, georssns, "polygon");
        if (polygon && polygon.length > 0) {
            var coords;
            var p;
            var points;
            for (var i=0, ii=polygon.length; i<ii; i++) {
                coords = OpenLayers.String.trim(
                            polygon[i].firstChild.nodeValue
                            ).split(/\s+/);
                points = [];
                for (var j=0, jj=coords.length; j<jj; j+=2) {
                    p = new OpenLayers.Geometry.Point(coords[j+1], coords[j]);
                    points.push(p);
                }
                components.push(
                    new OpenLayers.Geometry.Polygon(
                        [new OpenLayers.Geometry.LinearRing(components)]
                    )
                );
            }
        }
        
        if (this.internalProjection && this.externalProjection) {
            for (var i=0, ii=components.length; i<ii; i++) {
                if (components[i]) {
                    components[i].transform(
                        this.externalProjection,
                        this.internalProjection
                    );
                }
            }
        }
        
        return components;
    },
    
    /**
     * Method: parsePersonConstruct
     * Parse Atom person constructs from an Atom entry node.
     *
     * Parameters:
     * node - {DOMElement} An Atom entry or feed node.
     * name - {String} Construcy name ("author" or "contributor")
     * data = {Object} Object in which to put parsed persons.
     *
     * Returns:
     * An {Object}.
     */
    parsePersonConstructs: function(node, name, data) {
        var persons = [];
        var atomns = this.namespaces.atom;
        var nodes = this.getElementsByTagNameNS(node, atomns, name);
        var oAtts = ["uri", "email"];
        for (var i=0, ii=nodes.length; i<ii; i++) {
            var value = {};
            value.name = this.getFirstChildValue(
                            nodes[i],
                            atomns,
                            "name",
                            null
                            );
            for (var j=0, jj=oAtts.length; j<jj; j++) {
                var attval = this.getFirstChildValue(
                            nodes[i],
                            atomns,
                            oAtts[j],
                            null);
                if (attval) {
                    value[oAtts[j]] = attval;
                }
            }
            persons.push(value);
        }
        if (persons.length > 0) {
            data[name + "s"] = persons;
        }
    },

    CLASS_NAME: "OpenLayers.Format.Atom"
});
/* ======================================================================
    OpenLayers/Control/KeyboardDefaults.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Control.js
 * @requires OpenLayers/Handler/Keyboard.js
 */

/**
 * Class: OpenLayers.Control.KeyboardDefaults
 * The KeyboardDefaults control adds panning and zooming functions, controlled
 * with the keyboard. By default arrow keys pan, +/- keys zoom & Page Up/Page
 * Down/Home/End scroll by three quarters of a page.
 * 
 * This control has no visible appearance.
 *
 * Inherits from:
 *  - <OpenLayers.Control>
 */
OpenLayers.Control.KeyboardDefaults = OpenLayers.Class(OpenLayers.Control, {

    /**
     * APIProperty: autoActivate
     * {Boolean} Activate the control when it is added to a map.  Default is
     *     true.
     */
    autoActivate: true,

    /**
     * APIProperty: slideFactor
     * Pixels to slide by.
     */
    slideFactor: 75,

    /**
     * APIProperty: observeElement
     * {DOMelement|String} The DOM element to handle keys for. You
     *     can use the map div here, to have the navigation keys
     *     work when the map div has the focus. If undefined the
     *     document is used.
     */
    observeElement: null,

    /**
     * Constructor: OpenLayers.Control.KeyboardDefaults
     */
        
    /**
     * Method: draw
     * Create handler.
     */
    draw: function() {
        var observeElement = this.observeElement || document;
        this.handler = new OpenLayers.Handler.Keyboard( this,
                {"keydown": this.defaultKeyPress},
                {observeElement: observeElement}
        );
    },
    
    /**
     * Method: defaultKeyPress
     * When handling the key event, we only use evt.keyCode. This holds 
     * some drawbacks, though we get around them below. When interpretting
     * the keycodes below (including the comments associated with them),
     * consult the URL below. For instance, the Safari browser returns
     * "IE keycodes", and so is supported by any keycode labeled "IE".
     * 
     * Very informative URL:
     *    http://unixpapa.com/js/key.html
     *
     * Parameters:
     * evt - {Event} 
     */
    defaultKeyPress: function (evt) {
        var size, handled = true;
        switch(evt.keyCode) {
            case OpenLayers.Event.KEY_LEFT:
                this.map.pan(-this.slideFactor, 0);
                break;
            case OpenLayers.Event.KEY_RIGHT: 
                this.map.pan(this.slideFactor, 0);
                break;
            case OpenLayers.Event.KEY_UP:
                this.map.pan(0, -this.slideFactor);
                break;
            case OpenLayers.Event.KEY_DOWN:
                this.map.pan(0, this.slideFactor);
                break;
            
            case 33: // Page Up. Same in all browsers.
                size = this.map.getSize();
                this.map.pan(0, -0.75*size.h);
                break;
            case 34: // Page Down. Same in all browsers.
                size = this.map.getSize();
                this.map.pan(0, 0.75*size.h);
                break; 
            case 35: // End. Same in all browsers.
                size = this.map.getSize();
                this.map.pan(0.75*size.w, 0);
                break; 
            case 36: // Home. Same in all browsers.
                size = this.map.getSize();
                this.map.pan(-0.75*size.w, 0);
                break; 

            case 43:  // +/= (ASCII), keypad + (ASCII, Opera)
            case 61:  // +/= (Mozilla, Opera, some ASCII)
            case 187: // +/= (IE)
            case 107: // keypad + (IE, Mozilla)
                this.map.zoomIn();
                break; 
            case 45:  // -/_ (ASCII, Opera), keypad - (ASCII, Opera)
            case 109: // -/_ (Mozilla), keypad - (Mozilla, IE)
            case 189: // -/_ (IE)
            case 95:  // -/_ (some ASCII)
                this.map.zoomOut();
                break; 
            default:
                handled = false;
        }
        if (handled) {
            // prevent browser default not to move the page
            // when moving the page with the keyboard
            OpenLayers.Event.stop(evt);
        }
    },

    CLASS_NAME: "OpenLayers.Control.KeyboardDefaults"
});
/* ======================================================================
    OpenLayers/Format/WMTSCapabilities/v1_0_0.js
   ====================================================================== */

/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for 
 * full list of contributors). Published under the 2-clause BSD license.
 * See license.txt in the OpenLayers distribution or repository for the
 * full text of the license. */

/**
 * @requires OpenLayers/Format/WMTSCapabilities.js
 * @requires OpenLayers/Format/OWSCommon/v1_1_0.js
 */

/**
 * Class: OpenLayers.Format.WMTSCapabilities.v1_0_0
 * Read WMTS Capabilities version 1.0.0.
 * 
 * Inherits from:
 *  - <OpenLayers.Format.WMTSCapabilities>
 */
OpenLayers.Format.WMTSCapabilities.v1_0_0 = OpenLayers.Class(
    OpenLayers.Format.OWSCommon.v1_1_0, {
        
    /**
     * Property: version
     * {String} The parser version ("1.0.0").
     */
    version: "1.0.0",

    /**
     * Property: namespaces
     * {Object} Mapping of namespace aliases to namespace URIs.
     */
    namespaces: {
        ows: "http://www.opengis.net/ows/1.1",
        wmts: "http://www.opengis.net/wmts/1.0",
        xlink: "http://www.w3.org/1999/xlink"
    },    
    
    /**
     * Property: yx
     * {Object} Members in the yx object are used to determine if a CRS URN
     *     corresponds to a CRS with y,x axis order.  Member names are CRS URNs
     *     and values are boolean.  Defaults come from the 
     *     <OpenLayers.Format.WMTSCapabilities> prototype.
     */
    yx: null,

    /**
     * Property: defaultPrefix
     * {String} The default namespace alias for creating element nodes.
     */
    defaultPrefix: "wmts",

    /**
     * Constructor: OpenLayers.Format.WMTSCapabilities.v1_0_0
     * Create a new parser for WMTS capabilities version 1.0.0. 
     *
     * Parameters:
     * options - {Object} An optional object whose properties will be set on
     *     this instance.
     */
    initialize: function(options) {
        OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
        this.options = options;
        var yx = OpenLayers.Util.extend(
            {}, OpenLayers.Format.WMTSCapabilities.prototype.yx
        );
        this.yx = OpenLayers.Util.extend(yx, this.yx);
    },

    /**
     * APIMethod: read
     * Read capabilities data from a string, and return info about the WMTS.
     * 
     * Parameters: 
     * data - {String} or {DOMElement} data to read/parse.
     *
     * Returns:
     * {Object} Information about the SOS service.
     */
    read: function(data) {
        if(typeof data == "string") {
            data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
        }
        if(data && data.nodeType == 9) {
            data = data.documentElement;
        }
        var capabilities = {};
        this.readNode(data, capabilities);
        capabilities.version = this.version;
        return capabilities;
    },

    /**
     * Property: readers
     * Contains public functions, grouped by namespace prefix, that will
     *     be applied when a namespaced node is found matching the function
     *     name.  The function will be applied in the scope of this parser
     *     with two arguments: the node being read and a context object passed
     *     from the parent.
     */
    readers: {        
        "wmts": {
            "Capabilities": function(node, obj) {
                this.readChildNodes(node, obj);
            },
            "Contents": function(node, obj) {
                obj.contents = {};                
                obj.contents.layers = [];
                obj.contents.tileMatrixSets = {};                
                this.readChildNodes(node, obj.contents);
            },
            "Layer": function(node, obj) {
                var layer = {
                    styles: [],
                    formats: [],
                    dimensions: [],
                    tileMatrixSetLinks: []
                };
                layer.layers = [];
                this.readChildNodes(node, layer);
                obj.layers.push(layer);
            },
            "Style": function(node, obj) {
                var style = {};
                style.isDefault = (node.getAttribute("isDefault") === "true");
                this.readChildNodes(node, style);
                obj.styles.push(style);
            },
            "Format": function(node, obj) {
                obj.formats.push(this.getChildValue(node)); 
            },
            "TileMatrixSetLink": function(node, obj) {
                var tileMatrixSetLink = {};
                this.readChildNodes(node, tileMatrixSetLink);
                obj.tileMatrixSetLinks.push(tileMatrixSetLink);
            },
            "TileMatrixSet": function(node, obj) {
                // node could be child of wmts:Contents or wmts:TileMatrixSetLink
                // duck type wmts:Contents by looking for layers
                if (obj.layers) {
                    // TileMatrixSet as object type in schema
                    var tileMatrixSet = {
                        matrixIds: []
                    };
                    this.readChildNodes(node, tileMatrixSet);
                    obj.tileMatrixSets[tileMatrixSet.identifier] = tileMatrixSet;
                } else {
                    // TileMatrixSet as string type in schema
                    obj.tileMatrixSet = this.getChildValue(node);
                }
            },
            "TileMatrix": function(node, obj) {
                var tileMatrix = {
                    supportedCRS: obj.supportedCRS
                };
                this.readChildNodes(node, tileMatrix);
                obj.matrixIds.push(tileMatrix);
            },
            "ScaleDenominator": function(node, obj) {
                obj.scaleDenominator = parseFloat(this.getChildValue(node)); 
            },
            "TopLeftCorner": function(node, obj) {                
                var topLeftCorner = this.getChildValue(node);
                var coords = topLeftCorner.split(" ");
                // decide on axis order for the given CRS
                var yx;
                if (obj.supportedCRS) {
                    // extract out version from URN
                    var crs = obj.supportedCRS.replace(
                        /urn:ogc:def:crs:(\w+):.+:(\w+)$/, 
                        "urn:ogc:def:crs:$1::$2"
                    );
                    yx = !!this.yx[crs];
                }
                if (yx) {
                    obj.topLeftCorner = new OpenLayers.LonLat(
                        coords[1], coords[0]
                    );
                } else {
                    obj.topLeftCorner = new OpenLayers.LonLat(
                        coords[0], coords[1]
                    );
                }
            },
            "TileWidth": function(node, obj) {
                obj.tileWidth = parseInt(this.getChildValue(node)); 
            },
            "TileHeight": function(node, obj) {
                obj.tileHeight = parseInt(this.getChildValue(node)); 
            },
            "MatrixWidth": function(node, obj) {
                obj.matrixWidth = parseInt(this.getChildValue(node)); 
            },
            "MatrixHeight": function(node, obj) {
                obj.matrixHeight = parseInt(this.getChildValue(node)); 
            },
            "ResourceURL": function(node, obj) {
                obj.resourceUrl = obj.resourceUrl || {};
                obj.resourceUrl[node.getAttribute("resourceType")] = {
                    format: node.getAttribute("format"),
                    template: node.getAttribute("template")
                };
            },
            // not used for now, can be added in the future though
            /*"Themes": function(node, obj) {
                obj.themes = [];
                this.readChildNodes(node, obj.themes);
            },
            "Theme": function(node, obj) {
                var theme = {};                
                this.readChildNodes(node, theme);
                obj.push(theme);
            },*/
            "WSDL": function(node, obj) {
                obj.wsdl = {};
                obj.wsdl.href = node.getAttribute("xlink:href");
                // TODO: other attributes of <WSDL> element                
            },
            "ServiceMetadataURL": function(node, obj) {
                obj.serviceMetadataUrl = {};
                obj.serviceMetadataUrl.href = node.getAttribute("xlink:href");
                // TODO: other attributes of <ServiceMetadataURL> element                
            },
            "LegendURL": function(node, obj) {
                obj.legend = {};
                obj.legend.href = node.getAttribute("xlink:href");
                obj.legend.format = node.getAttribute("format");
            },
            "Dimension": function(node, obj) {
                var dimension = {values: []};
                this.readChildNodes(node, dimension);
                obj.dimensions.push(dimension);
            },
            "Default": function(node, obj) {
                obj["default"] = this.getChildValue(node);
            },
            "Value": function(node, obj) {
                obj.values.push(this.getChildValue(node));
            }
        },
        "ows": OpenLayers.Format.OWSCommon.v1_1_0.prototype.readers["ows"]
    },    
    
    CLASS_NAME: "OpenLayers.Format.WMTSCapabilities.v1_0_0" 

});
