# Coverage for pygeodesy/wgrs.py : 96%

## 193 statements 186 run 7 missing 5 excluded

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Classes L{Georef} and L{WGRSError} and several functions to encode, decode and inspect WGRS references. Transcribed from I{Charles Karney}'s C++ class U{Georef <https://GeographicLib.SourceForge.io/html/classGeographicLib_1_1Georef.html>}, but with modified C{precision} and extended with C{height} and C{radius}. See also U{World Geographic Reference System <https://WikiPedia.org/wiki/World_Geographic_Reference_System>}. ''' from pygeodesy.basics import isstr from pygeodesy.dms import parse3llh # parseDMS2 from pygeodesy.errors import _ValueError, _xkwds from pygeodesy.interns import EPS1_2, NN, _AtoZnoIO_, _float, \ _height_, _radius_, _SPACE_, _0to9_, \ _0_5, _0_001, _1_0, _2_0, _60_0, _90_0 from pygeodesy.lazily import _ALL_LAZY, _ALL_OTHER from pygeodesy.named import nameof from pygeodesy.namedTuples import LatLon2Tuple, LatLonPrec3Tuple from pygeodesy.props import Property_RO from pygeodesy.streprs import Fmt, _0wd from pygeodesy.units import Height, Int, Lat, Lon, Precision_, \ Radius, Scalar_, Str, _xStrError from pygeodesy.utily import ft2m, m2ft, m2NM from math import floor __all__ = _ALL_LAZY.wgrs __version__ = '21.04.22' _1000_0 = _float(1000) _Base = 10 _BaseLen = 4 _DegChar = _AtoZnoIO_.tillQ _Digits = _0to9_ _Height_ = Height.__name__ _INV_ = 'INV' _LatOrig = -90 _LatTile = _AtoZnoIO_.tillM _LonOrig = -180 _LonTile = _AtoZnoIO_ _M_ = 60000000000 # == 60_000_000_000 == 60 * pow(10, 9) _MaxPrec = 11 _Radius_ = Radius.__name__ _Tile = 15 # tile size in degrees _MaxLen = _BaseLen + 2 * _MaxPrec _MinLen = _BaseLen - 2 _LatOrig_M_ = _LatOrig * _M_ _LonOrig_M_ = _LonOrig * _M_ _float_Tile = _float(_Tile) _LatOrig_Tile = _float(_LatOrig) / _Tile _LonOrig_Tile = _float(_LonOrig) / _Tile def _2divmod3(x, Orig_M_): '''(INTERNAL) Convert B{C{x}} to 3_tuple C{(tile, modulo, fraction)}/ ''' i = int(floor(x * _M_)) i, x = divmod(i - Orig_M_, _M_) xt, xd = divmod(i, _Tile) return xt, xd, x def _2fllh(lat, lon, height=None): '''(INTERNAL) Convert lat, lon, height. ''' # lat, lon = parseDMS2(lat, lon) return (Lat(lat, Error=WGRSError), Lon(lon, Error=WGRSError), height) def _2geostr2(georef): '''(INTERNAL) Check a georef string. ''' try: n, geostr = len(georef), georef.upper() p, o = divmod(n, 2) if o or n < _MinLen or n > _MaxLen \ or geostr[:3] == _INV_ \ or not geostr.isalnum(): raise ValueError return geostr, _2Precision(p - 1) except (AttributeError, TypeError, ValueError) as x: raise WGRSError(Georef.__name__, georef, txt=str(x)) def _2Precision(precision): '''(INTERNAL) Return a L{Precision_} instance. ''' return Precision_(precision, Error=WGRSError, low=0, high=_MaxPrec) class WGRSError(_ValueError): '''World Geographic Reference System (WGRS) encode, decode or other L{Georef} issue. ''' pass class Georef(Str): '''Georef class, a named C{str}. ''' # no str.__init__ in Python 3 def __new__(cls, cll, precision=3, name=NN): '''New L{Georef} from an other L{Georef} instance or georef C{str} or from a C{LatLon} instance or lat-/longitude C{str}. @arg cll: Cell or location (L{Georef} or C{str}, C{LatLon} or C{str}). @kwarg precision: Optional, the desired georef resolution and length (C{int} 0..11), see function L{wgrs.encode} for more details. @kwarg name: Optional name (C{str}). @return: New L{Georef}. @raise RangeError: Invalid B{C{cll}} lat- or longitude. @raise TypeError: Invalid B{C{cll}}. @raise WGRSError: INValid or non-alphanumeric B{C{cll}}. ''' ll = p = None if isinstance(cll, Georef): g, p = _2geostr2(str(cll)) elif isstr(cll): if ',' in cll: lat, lon, h = _2fllh(*parse3llh(cll, height=None)) g = encode(lat, lon, precision=precision, height=h) # PYCHOK false ll = lat, lon # original lat, lon else: g = cll.upper() else: # assume LatLon try: lat, lon, h = _2fllh(cll.lat, cll.lon) h = getattr(cll, _height_, h) except AttributeError: raise _xStrError(Georef, cll=cll) # Error=WGRSError g = encode(lat, lon, precision=precision, height=h) # PYCHOK false ll = lat, lon # original lat, lon self = Str.__new__(cls, g, name=name or nameof(cll)) self._latlon = ll self._precision = p return self @Property_RO def decoded3(self): '''Get this georef's attributes (L{LatLonPrec3Tuple}). ''' lat, lon = self.latlon return LatLonPrec3Tuple(lat, lon, self.precision, name=self.name) @Property_RO def decoded5(self): '''Get this georef's attributes (L{LatLonPrec5Tuple}) with height and radius set to C{None} if missing. ''' return self.decoded3.to5Tuple(self.height, self.radius) @Property_RO def _decoded5(self): '''(INTERNAL) Initial L{LatLonPrec5Tuple}. ''' return decode5(self) @Property_RO def height(self): '''Get this georef's height in C{meter} or C{None} if missing. ''' return self._decoded5.height @Property_RO def latlon(self): '''Get this georef's (center) lat- and longitude (L{LatLon2Tuple}). ''' lat, lon = self._latlon or self._decoded5[:2] return LatLon2Tuple(lat, lon, name=self.name) @Property_RO def latlonheight(self): '''Get this georef's (center) lat-, longitude and height (L{LatLon3Tuple}), with height set to C{0} if missing. ''' return self.latlon.to3Tuple(self.height or 0) @Property_RO def precision(self): '''Get this georef's precision (C{int}). ''' p = self._precision return self._decoded5.precision if p is None else p @Property_RO def radius(self): '''Get this georef's radius in C{meter} or C{None} if missing. ''' return self._decoded5.radius def toLatLon(self, LatLon=None, height=None, **LatLon_kwds): '''Return (the center of) this georef cell as an instance of the supplied C{LatLon} class. @kwarg LatLon: Class to use (C{LatLon}) or C{None}. @kwarg height: Optional height ({meter}). @kwarg LatLon_kwds: Optional, additional B{C{LatLon}} keyword arguments, ignored if C{B{LatLon}=None}. @return: This georef location (B{C{LatLon}}) or if B{C{LatLon}} is C{None}, a L{LatLon3Tuple}C{(lat, lon, height)}. @raise TypeError: Invalid B{C{LatLon}} or B{C{LatLon_kwds}}. ''' if LatLon is None: r = self.latlonheight if height is None else \ self.latlon.to3Tuple(height) else: h = (self.height or 0) if height is None else height r = LatLon(*self.latlon, height=h, **_xkwds(LatLon_kwds, name=self.name)) return r def decode3(georef, center=True): '''Decode a C{georef} to lat-, longitude and precision. @arg georef: To be decoded (L{Georef} or C{str}). @kwarg center: If C{True} the center, otherwise the south-west, lower-left corner (C{bool}). @return: A L{LatLonPrec3Tuple}C{(lat, lon, precision)}. @raise WGRSError: Invalid B{C{georef}}, INValid, non-alphanumeric or odd length B{C{georef}}. ''' def _digit(ll, g, i, m): d = _Digits.find(g[i]) if d < 0 or d >= m: raise _Error(i) return ll * m + d def _Error(i): return WGRSError(Fmt.SQUARE(georef=i), georef) def _index(chars, g, i): k = chars.find(g[i]) if k < 0: raise _Error(i) return k g, precision = _2geostr2(georef) lon = _index(_LonTile, g, 0) + _LonOrig_Tile lat = _index(_LatTile, g, 1) + _LatOrig_Tile u = _1_0 if precision > 0: lon = lon * _Tile + _index(_DegChar, g, 2) lat = lat * _Tile + _index(_DegChar, g, 3) m, p = 6, precision - 1 for i in range(_BaseLen, _BaseLen + p): lon = _digit(lon, g, i, m) lat = _digit(lat, g, i + p, m) u *= m m = _Base u *= _Tile if center: lon = lon * _2_0 + _1_0 lat = lat * _2_0 + _1_0 u *= _2_0 u = _Tile / u return LatLonPrec3Tuple(Lat(lat * u, Error=WGRSError), Lon(lon * u, Error=WGRSError), precision, name=nameof(georef)) def decode5(georef, center=True): '''Decode a C{georef} to lat-, longitude, precision, height and radius. @arg georef: To be decoded (L{Georef} or C{str}). @kwarg center: If C{True} the center, otherwise the south-west, lower-left corner (C{bool}). @return: A L{LatLonPrec5Tuple}C{(lat, lon, precision, height, radius)} where C{height} and/or C{radius} are C{None} if missing. @raise WGRSError: Invalid B{C{georef}}, INValid, non-alphanumeric or odd length B{C{georef}}. ''' def _h2m(kft, name): return Height(ft2m(kft * _1000_0), name=name, Error=WGRSError) def _r2m(NM, name): return Radius(NM / m2NM(1), name=name, Error=WGRSError) def _split2(g, name, _2m): i = max(g.find(name[0]), g.rfind(name[0])) if i > _BaseLen: return g[:i], _2m(int(g[i+1:]), _SPACE_(georef, name)) else: return g, None g = Str(georef, Error=WGRSError) g, h = _split2(g, _Height_, _h2m) # H is last g, r = _split2(g, _Radius_, _r2m) # R before H return decode3(g, center=center).to5Tuple(h, r) def encode(lat, lon, precision=3, height=None, radius=None): # MCCABE 14 '''Encode a lat-/longitude as a C{georef} of the given precision. @arg lat: Latitude (C{degrees}). @arg lon: Longitude (C{degrees}). @kwarg precision: Optional, the desired C{georef} resolution and length (C{int} 0..11). @kwarg height: Optional, height in C{meter}, see U{Designation of area <https://WikiPedia.org/wiki/World_Geographic_Reference_System>}. @kwarg radius: Optional, radius in C{meter}, see U{Designation of area <https://WikiPedia.org/wiki/World_Geographic_Reference_System>}. @return: The C{georef} (C{str}). @raise RangeError: Invalid B{C{lat}} or B{C{lon}}. @raise WGRSError: Invalid B{C{precision}}, B{C{height}} or B{C{radius}}. @note: The B{C{precision}} value differs from U{Georef<https:// GeographicLib.SourceForge.io/html/classGeographicLib_1_1Georef.html>}. The C{georef} length is M{2 * (precision + 1)} and the C{georef} resolution is I{15°} for B{C{precision}} 0, I{1°} for 1, I{1′} for 2, I{0.1′} for 3, I{0.01′} for 4, ... M{10**(2 - precision)}. ''' def _option(name, m, m2_, K): f = Scalar_(m, name=name, Error=WGRSError) return NN(name[0].upper(), int(m2_(f * K) + _0_5)) p = _2Precision(precision) lat, lon, _ = _2fllh(lat, lon) if lat == _90_0: lat *= EPS1_2 xt, xd, x = _2divmod3(lon, _LonOrig_M_) yt, yd, y = _2divmod3(lat, _LatOrig_M_) g = _LonTile[xt], _LatTile[yt] if p > 0: g += _DegChar[xd], _DegChar[yd] p -= 1 if p > 0: d = pow(_Base, _MaxPrec - p) x = _0wd(p, x // d) y = _0wd(p, y // d) g += x, y if radius is not None: # R before H g += _option(_radius_, radius, m2NM, _1_0), if height is not None: # H is last g += _option(_height_, height, m2ft, _0_001), return NN.join(g) # XXX Georef(''.join(g)) def precision(res): '''Determine the L{Georef} precision to meet a required (geographic) resolution. @arg res: The required resolution (C{degrees}). @return: The L{Georef} precision (C{int} 0..11). @raise ValueError: Invalid B{C{res}}. @see: Function L{wgrs.encode} for more C{precision} details. ''' r = Scalar_(res=res) for p in range(_MaxPrec): if resolution(p) <= r: return p return _MaxPrec def resolution(prec): '''Determine the (geographic) resolution of a given L{Georef} precision. @arg prec: The given precision (C{int}). @return: The (geographic) resolution (C{degrees}). @raise ValueError: Invalid B{C{prec}}. @see: Function L{wgrs.encode} for more C{precision} details. ''' p = Int(prec=prec, Error=WGRSError) if p > 1: r = _1_0 / (_60_0 * pow(_Base, min(p, _MaxPrec) - 1)) elif p < 1: r = _float_Tile else: r = _1_0 return r __all__ += _ALL_OTHER(decode3, decode5, # functions encode, precision, resolution) # **) MIT License # # Copyright (C) 2016-2021 -- mrJean1 at Gmail -- All Rights Reserved. # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR # OTHER DEALINGS IN THE SOFTWARE.