# Coverage for pygeodesy/mgrs.py : 94%

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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 | # -*- coding: utf-8 -*- u'''Military Grid Reference System (MGRS/NATO) classes L{Mgrs} and L{MGRSError} and functions L{parseMGRS} and L{toMgrs}. Pure Python implementation of MGRS / UTM conversion functions using an ellipsoidal earth model, transcribed from JavaScript originals by I{(C) Chris Veness 2014-2016} published under the same MIT Licence**, see U{MGRS<https://www.Movable-Type.co.UK/scripts/latlong-utm-mgrs.html>} and U{Module mgrs<https://www.Movable-Type.co.UK/scripts/geodesy/docs/module-mgrs.html>}. The MGRS/NATO grid references provides geocoordinate references covering the entire globe, based on UTM projections. MGRS references comprise a grid zone designation, a 100 km square identification, and an easting and northing (in metres). Depending on requirements, some parts of the reference may be omitted (implied), and easting/northing may be given to varying resolution. See also U{United States National Grid <https://www.FGDC.gov/standards/projects/FGDC-standards-projects/usng/fgdc_std_011_2001_usng.pdf>} and U{Military Grid Reference System<https://WikiPedia.org/wiki/Military_grid_reference_system>}. @newfield example: Example, Examples ''' from pygeodesy.datum import Datums from pygeodesy.lazily import _ALL_LAZY from pygeodesy.named import _NamedBase, Mgrs4Tuple, Mgrs6Tuple, \ UtmUps4Tuple, _xnamed from pygeodesy.utily import enStr2, halfs2, property_RO, _TypeError from pygeodesy.utm import toUtm8, _to3zBlat, Utm from pygeodesy.utmupsBase import _hemi import re # PYCHOK warning locale.Error # all public contants, classes and functions __all__ = _ALL_LAZY.mgrs __version__ = '20.01.22' _100km = 100e3 #: (INTERNAL) 100 km in meter. _2000km = 2000e3 #: (INTERNAL) 2,000 km in meter. # 100 km grid square column (‘e’) letters repeat every third zone _Le100k = 'ABCDEFGH', 'JKLMNPQR', 'STUVWXYZ' #: (INTERNAL) Grid E colums. # 100 km grid square row (‘n’) letters repeat every other zone _Ln100k = 'ABCDEFGHJKLMNPQRSTUV', 'FGHJKLMNPQRSTUVABCDE' #: (INTERNAL) Grid N rows. # split an MGRS string "12ABC1235..." into 3 parts _MGRSre = re.compile('([0-9]{1,2}[C-X]{1})([A-Z]{2})([0-9]+)', re.IGNORECASE) #: (INTERNAL) Regex. _GZDre = re.compile('([0-9]{1,2}[C-X]{1})', re.IGNORECASE) #: (INTERNAL) Regex. class MGRSError(ValueError): '''Military Grid Reference System (MGRS) parse or other L{Mgrs} issue. ''' pass class Mgrs(_NamedBase): '''Military Grid Reference System (MGRS/NATO) references, with method to convert to UTM coordinates. ''' _band = '' #: (INTERNAL) Latitudinal band (C..X). _bandLat = None #: (INTERNAL) Band latitude (C{degrees90} or C{None}). _datum = Datums.WGS84 #: (INTERNAL) Datum (L{Datum}). _easting = 0 #: (INTERNAL) Easting (C{meter}), within 100 km grid square. _en100k = '' #: (INTERNAL) Grid EN digraph (C{str}), 100 km grid square. _northing = 0 #: (INTERNAL) Northing (C{meter}), within 100 km grid square. _zone = 0 #: (INTERNAL) Longitudinal zone (C{int}), 1..60. def __init__(self, zone, en100k, easting, northing, band='', datum=Datums.WGS84, name=''): '''New L{Mgrs} Military grid reference. @param zone: 6° longitudinal zone (C{int}), 1..60 covering 180°W..180°E. @param en100k: Two-letter EN digraph (C{str}), 100 km grid square. @param easting: Easting (C{meter}), within 100 km grid square. @param northing: Northing (C{meter}), within 100 km grid square. @keyword band: Optional 8° latitudinal band (C{str}), C..X covering 80°S..84°N. @keyword datum: Optional this reference's datum (L{Datum}). @keyword name: Optional name (C{str}). @raise MGRSError: Invalid MGRS grid reference, B{C{zone}}, B{C{en100k}} or B{C{band}}. @example: >>> from pygeodesy import Mgrs >>> m = Mgrs('31U', 'DQ', 48251, 11932) # 31U DQ 48251 11932 ''' if name: self.name = name self._zone, self._band, self._bandLat = _to3zBlat(zone, band, MGRSError) try: en = str(en100k).upper() if len(en) != 2: raise IndexError # caught below self._en100k = en self._en100k2m() except IndexError: raise MGRSError('%s invalid: %r' % ('en100k', en100k)) self._easting, self._northing = float(easting), float(northing) if self._datum != datum: self._datum = datum def _en100k2m(self): # check and convert grid letters to meter z = self._zone - 1 # get easting specified by e100k (note, +1 because # eastings start at 166e3 due to 500 km false origin) e = float(_Le100k[z % 3].index(self._en100k[0]) + 1) * _100km # metres # similarly, get northing specified by n100k n = float(_Ln100k[z % 2].index(self._en100k[1])) * _100km # metres return e, n @property_RO def band(self): '''Get the latitudinal band (C{str, 'A'|'B'..'Y'|'Z'}). ''' return self._band @property_RO def bandLatitude(self): '''Get the band latitude (C{degrees90} or C{None}). ''' return self._bandLat @property_RO def datum(self): '''Get the datum (L{Datum}). ''' return self._datum @property_RO def en100k(self): '''Get the 2-character grid EN digraph (C{str}). ''' return self._en100k digraph = en100k @property_RO def easting(self): '''Gets the easting (C{meter}). ''' return self._easting @property_RO def northing(self): '''Get the northing (C{meter}). ''' return self._northing def parse(self, strMGRS): '''Parse a string to a MGRS grid reference. @param strMGRS: MGRS grid reference (C{str}). @return: MGRS reference (L{Mgrs}). @raise MGRSError: Invalid B{C{strMGRS}}. @see: Function L{parseMGRS} in this module L{mgrs}. ''' return parseMGRS(strMGRS, datum=self.datum, Mgrs=self.classof) def toStr(self, prec=10, sep=' '): # PYCHOK expected '''Return a string representation of this MGRS grid reference. Note that MGRS grid references are truncated, not rounded (unlike UTM coordinates). @keyword prec: Optional number of digits (C{int}), 4:km, 10:m. @keyword sep: Optional separator to join (C{str}). @return: This Mgrs as "00B EN easting northing" (C{str}). @raise ValueError: Invalid B{C{prec}}. @example: >>> m = Mgrs(31, 'DQ', 48251, 11932, band='U') >>> m.toStr() # '31U DQ 48251 11932' ''' t = enStr2(self._easting, self._northing, prec, '%02d%s' % (self._zone, self._band), self._en100k) return sep.join(t) def toStr2(self, prec=10, fmt='[%s]', sep=', '): # PYCHOK expected '''Return a string representation of this MGRS grid reference. @keyword prec: Optional number of digits (C{int}), 4:km, 10:m. @keyword fmt: Optional enclosing backets format (C{str}). @keyword sep: Optional separator between name:values (C{str}). @return: This Mgrs as "[Z:00B, G:EN, E:meter, N:meter]" (C{str}). ''' t = self.toStr(prec=prec, sep=' ').split() return fmt % (sep.join('%s:%s' % t for t in zip('ZGEN', t)),) def toUtm(self, Utm=Utm): '''Convert this MGRS grid reference to a UTM coordinate. @keyword Utm: Optional (sub-)class to return the UTM coordinate (L{Utm}) or C{None}. @return: The UTM coordinate (L{Utm}) or a L{UtmUps4Tuple}C{(zone, hemipole, easting, northing)} if B{C{Utm}} is C{None}. @example: >>> m = Mgrs('31U', 'DQ', 448251, 11932) >>> u = m.toUtm() # 31 N 448251 5411932 ''' # get northing of the band bottom, extended to # include entirety of bottom-most 100 km square n = toUtm8(self._bandLat, 0, datum=self._datum).northing nb = int(n / _100km) * _100km e, n = self._en100k2m() # 100 km grid square row letters repeat every 2,000 km north; # add enough 2,000 km blocks to get into required band e += self._easting n += self._northing while n < nb: n += _2000km h = _hemi(self.bandLatitude) # if self._band < 'N' if Utm is None: r = UtmUps4Tuple(self.zone, h, e, n) else: r = Utm(self.zone, h, e, n, band=self.band, datum=self.datum) return self._xnamed(r) @property_RO def zone(self): '''Get the longitudal zone (C{int}, 1..60). ''' return self._zone def parseMGRS(strMGRS, datum=Datums.WGS84, Mgrs=Mgrs, name=''): '''Parse a string representing a MGRS grid reference, consisting of zoneBand, grid, easting and northing. @param strMGRS: MGRS grid reference (C{str}). @keyword datum: Optional datum to use (L{Datum}). @keyword Mgrs: Optional (sub-)class to return the MGRS grid reference (L{Mgrs}) or C{None}. @keyword name: Optional B{C{Mgrs}} name (C{str}). @return: The MGRS grid reference (B{L{Mgrs}}) or an L{Mgrs4Tuple}C{(zone, digraph, easting, northing)} if B{C{Mgrs}} is C{None}. @raise MGRSError: Invalid B{C{strMGRS}}. @example: >>> m = parseMGRS('31U DQ 48251 11932') >>> str(m) # 31U DQ 48251 11932 >>> m = parseMGRS('31UDQ4825111932') >>> repr(m) # [Z:31U, G:DQ, E:48251, N:11932] >>> m = mgrs.parseMGRS('42SXD0970538646') >>> str(m) # 42S XD 09705 38646 >>> m = mgrs.parseMGRS('42SXD9738') # Km >>> str(m) # 42S XD 97000 38000 ''' def _mg(cre, s): # return re.match groups m = cre.match(s) if not m: raise ValueError return m.groups() def _s2m(g): # e or n string to float meter # convert to meter if less than 5 digits m = g + '00000' return float(m[:5]) m = tuple(strMGRS.strip().replace(',', ' ').split()) try: if len(m) == 1: # 01ABC1234512345' m = _mg(_MGRSre, m[0]) m = m[:2] + halfs2(m[2]) elif len(m) == 2: # 01ABC 1234512345' m = _mg(_GZDre, m[0]) + halfs2(m[1]) elif len(m) == 3: # 01ABC 12345 12345' m = _mg(_GZDre, m[0]) + m[1:] if len(m) != 4: # 01A BC 1234 12345 raise ValueError e, n = map(_s2m, m[2:]) except (TypeError, ValueError): raise MGRSError('%s invalid: %r' % ('strMGRS', strMGRS)) z, EN = m[0], m[1].upper() r = Mgrs4Tuple(z, EN, e, n) if Mgrs is None else \ Mgrs(z, EN, e, n, datum=datum) return _xnamed(r, name) def toMgrs(utm, Mgrs=Mgrs, name=''): '''Convert a UTM coordinate to an MGRS grid reference. @param utm: A UTM coordinate (L{Utm} or L{Etm}). @keyword Mgrs: Optional (sub-)class to return the MGRS grid reference (L{Mgrs}) or C{None}. @keyword name: Optional B{C{Mgrs}} name (C{str}). @return: The MGRS grid reference (B{L{Mgrs}}) or an L{Mgrs6Tuple}C{(zone, digraph, easting, northing, band, datum)} if B{L{Mgrs}} is C{None}. @raise TypeError: If B{C{utm}} is not L{Utm} nor L{Etm}. @raise MGRSError: Invalid B{C{utm}}. @example: >>> u = Utm(31, 'N', 448251, 5411932) >>> m = u.toMgrs() # 31U DQ 48251 11932 ''' _TypeError(Utm, utm=utm) # Utm, Etm e, n = utm.to2en(falsed=True) # truncate east-/northing to within 100 km grid square # XXX add rounding to nm precision? E, e = divmod(e, _100km) N, n = divmod(n, _100km) # columns in zone 1 are A-H, zone 2 J-R, zone 3 S-Z, then # repeating every 3rd zone (note -1 because eastings start # at 166e3 due to 500km false origin) z = utm.zone - 1 en = (_Le100k[z % 3][int(E) - 1] + # rows in even zones are A-V, in odd zones are F-E _Ln100k[z % 2][int(N) % len(_Ln100k[0])]) if Mgrs is None: r = Mgrs6Tuple(utm.zone, en, e, n, utm.band, utm.datum) else: r = Mgrs(utm.zone, en, e, n, band=utm.band, datum=utm.datum) return _xnamed(r, name or utm.name) # **) 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.