# Coverage for pygeodesy/wgrs.py : 94%

## 208 statements 195 run 13 missing 12 excluded

Hot-keys on this page

r m x p toggle line displays

j k next/prev highlighted chunk

0 (zero) top of page

1 (one) first highlighted chunk

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 | # -*- coding: utf-8 -*- u'''Classes L{Georef} and L{WGRSError} and several functions to encode, decode and inspect I{World Geographic Reference System (WGRS)} references. Transcribed from C++ class U{Georef <https://GeographicLib.SourceForge.io/html/classGeographicLib_1_1Georef.html>} by I{Charles Karney}, 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>}. @newfield example: Example, Examples ''' from pygeodesy.basics import EPS1_2, _IsNotError, isstr, \ _MISSING, property_RO from pygeodesy.dms import parse3llh, parseDMS2 from pygeodesy.lazily import _ALL_LAZY from pygeodesy.named import LatLon2Tuple, LatLonPrec3Tuple, \ LatLonPrec5Tuple, _NamedStr from pygeodesy.utily import ft2m, m2ft, m2NM # all public contants, classes and functions __all__ = _ALL_LAZY.wgrs + ('decode3', 'decode5', # functions 'encode', 'precision', 'resolution') __version__ = '20.03.09' _Base = 10 _BaseLen = 4 _Degrees = 'ABCDEFGHJKLMNPQ' _Digits = '0123456789' _LatOrig = -90 _LatTile = 'ABCDEFGHJKLM' _LonOrig = -180 _LonTile = 'ABCDEFGHJKLMNPQRSTUVWXYZ' _M = 60000000000 # = 60_000_000_000 = 60 * pow(10, 9) _MaxPrec = 11 _Tile = 15 # tile size in degrees _MaxLen = _BaseLen + 2 * _MaxPrec _MinLen = _BaseLen - 2 _LatOrig_M = _LatOrig * _M _LonOrig_M = _LonOrig * _M _LatOrig_Tile = float(_LatOrig) / _Tile _LonOrig_Tile = float(_LonOrig) / _Tile def _2divmod3(x, Orig_M): x *= _M i = int(x) if i > x: # floor(x * _M) i -= 1 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. ''' return parseDMS2(lat, lon) + (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 except (AttributeError, TypeError, ValueError): raise WGRSError('%s: %r[%s]' % (Georef.__name__, georef, len(georef))) return geostr, p - 1 class WGRSError(ValueError): '''World Geographic Reference System (WGRS) encode, decode or other L{Georef} issue. ''' pass class Georef(_NamedStr): '''Georef class, a C{_NamedStr}. ''' _height = _MISSING # meter _latlon = None # cached latlon property _precision = None _radius = _MISSING # meter # no str.__init__ in Python 3 def __new__(cls, cll, precision=3, name=''): '''New L{Georef} from an other L{Georef} instance or georef C{str} or from a C{LatLon} instance or lat-/longitude C{str}. @param cll: Cell or location (L{Georef} or C{str}, C{LatLon} or C{str}). @keyword precision: Optional, the desired georef resolution and length (C{int} 0..11), see function L{wgrs.encode} for more details. @keyword 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}}. ''' if isinstance(cll, Georef): g, p = _2geostr2(str(cll)) self = str.__new__(cls, g) self._latlon = LatLon2Tuple(*cll._latlon) self._name = cll._name self._precision = p # cll._precision elif isstr(cll): if ',' in cll: lat, lon, h = _2fllh(*parse3llh(cll, height=None)) g = encode(lat, lon, precision=precision, height=h) # PYCHOK false self = str.__new__(cls, g) self._latlon = LatLon2Tuple(lat, lon) self._precision = precision if h not in (None, _MISSING): self._height = h else: self = str.__new__(cls, cll.upper()) self._decode() else: # assume LatLon try: lat, lon, h = _2fllh(cll.lat, cll.lon) h = getattr(cll, 'height', h) except AttributeError: raise _IsNotError('valid', **{Georef.__name__: cll}) g = encode(lat, lon, precision=precision, height=h) # PYCHOK false self = str.__new__(cls, g) self._latlon = LatLon2Tuple(lat, lon) self._precision = precision if h not in (None, _MISSING): self._height = h if name: self.name = name return self def _decode(self): # cache all decoded attrs lat, lon, p, h, r = decode5(self) # PYCHOK LatLonPrec5Tuple if self._latlon is None: self._latlon = LatLon2Tuple(lat, lon) if self._precision is None: self._precision = p if self._height is _MISSING: self._height = h if self._radius is _MISSING: self._radius = r @property_RO def height(self): '''Get this georef's height in C{meter} or C{None} if missing. ''' if self._height is _MISSING: self._decode() return self._height @property_RO def latlon(self): '''Get this georef's (center) lat- and longitude (L{LatLon2Tuple}). ''' if self._latlon is None: self._decode() return self._latlon @property_RO def precision(self): '''Get this georef's precision (C{int}). ''' if self._precision is None: self._decode() return self._precision @property_RO def radius(self): '''Get this georef's radius in C{meter} or C{None} if missing. ''' if self._radius is _MISSING: self._decode() return self._radius def toLatLon(self, LatLon, height=None, **kwds): '''Return (the center of) this georef cell as an instance of the supplied C{LatLon} class. @param LatLon: Class to use (C{LatLon}). @keyword height: Optional height ({meter}). @keyword kwds: Optional keyword arguments for B{C{LatLon}}. @return: This georef location (B{C{LatLon}}). @raise WGRSError: Invalid B{C{LatLon}}. ''' if LatLon is None: raise WGRSError('%s invalid: %r' % ('LatLon', LatLon)) h = height if height is not None else (self.height or 0) return self._xnamed(LatLon(*self.latlon, height=h, **kwds)) def decode3(georef, center=True): '''Decode a C{georef} to lat-, longitude and precision. @param georef: To be decoded (L{Georef} or C{str}). @keyword 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('%s invalid: %r[%s]' % ('georef', georef, i)) 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, p = 1.0, precision - 1 if p >= 0: lon = lon * _Tile + _index(_Degrees, g, 2) lat = lat * _Tile + _index(_Degrees, g, 3) if p > 0: m = 6 for i in range(p): lon = _digit(lon, g, _BaseLen + i, m) lat = _digit(lat, g, _BaseLen + i + p, m) u *= m m = _Base u *= _Tile if center: lon = lon * 2 + 1 lat = lat * 2 + 1 u *= 2 u = _Tile / u lon *= u lat *= u return LatLonPrec3Tuple(lat, lon, precision) def decode5(georef, center=True): '''Decode a C{georef} to lat-, longitude, precision, height and radius. @param georef: To be decoded (L{Georef} or C{str}). @keyword 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): return ft2m(kft * 1000.0) def _r2m(NM): return NM / m2NM(1) def _split2(g, name, _2m): i = max(g.rfind(name[0]), g.rfind(name[0])) if i > _BaseLen: try: return g[:i], _2m(int(g[i+1:])) except (IndexError, ValueError): raise WGRSError('%s invalid: %r' % (name, georef)) return g, None try: g = str(georef) except (TypeError, ValueError): raise WGRSError('%s invalid: %r' % ('georef', georef)) g, h = _split2(g, 'Height', _h2m) # H is last g, r = _split2(g, 'Radius', _r2m) # R before H a, b, p = decode3(g, center=center) return LatLonPrec5Tuple(a, b, p, 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. @param lat: Latitude (C{degrees}). @param lon: Longitude (C{degrees}). @keyword precision: Optional, the desired C{georef} resolution and length (C{int} 0..11). @keyword height: Optional, height in C{meter}, see U{Designation of area <https://WikiPedia.org/wiki/World_Geographic_Reference_System>}. @keyword 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): try: f = m2_(float(m) * K) if f < 0: raise ValueError except (TypeError, ValueError): raise WGRSError('%s invalid: %r' % (name, m)) return '%s%d' % (name[0], int(f + 0.5)) def _pstr(p, x): return '%0*d' % (p, x) try: p = int(precision) if p < 0 or p > _MaxPrec: raise ValueError except (TypeError, ValueError): raise WGRSError('%s invalid: %r' % ('precision', precision)) lat, lon, _ = _2fllh(lat, lon) if lat == 90: 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 += _Degrees[xd], _Degrees[yd] p -= 1 if p > 0: d = pow(_Base, _MaxPrec - p) x = _pstr(p, x // d) y = _pstr(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, 1e-3), return ''.join(g) def precision(res): '''Determine the L{Georef} precision to meet a required (geographic) resolution. @param res: The required resolution (C{degrees}). @return: The L{Georef} precision (C{int} 0..11). @see: Function L{wgrs.encode} for more C{precision} details. ''' r = abs(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. @param prec: The given precision (C{int}). @return: The (geographic) resolution (C{degrees}). @see: Function L{wgrs.encode} for more C{precision} details. ''' if prec < 1: r = float(_Tile) elif prec == 1: r = 1.0 else: r = 1.0 / (60.0 * pow(_Base, min(prec, _MaxPrec) - 1)) return r # **) MIT License # # Copyright (C) 2016-2020 -- 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.