| 1 | """ |
|---|
| 2 | |
|---|
| 3 | """ |
|---|
| 4 | |
|---|
| 5 | |
|---|
| 6 | #FIXME: Ensure that all attributes of a georef are treated everywhere |
|---|
| 7 | #and unit test |
|---|
| 8 | |
|---|
| 9 | import types, sys |
|---|
| 10 | import copy |
|---|
| 11 | |
|---|
| 12 | from anuga.utilities.numerical_tools import ensure_numeric |
|---|
| 13 | from anuga.utilities.anuga_exceptions import ANUGAError, TitleError, \ |
|---|
| 14 | ParsingError, ShapeError |
|---|
| 15 | from anuga.config import netcdf_float, netcdf_int, netcdf_float32 |
|---|
| 16 | |
|---|
| 17 | import numpy as num |
|---|
| 18 | |
|---|
| 19 | |
|---|
| 20 | DEFAULT_ZONE = -1 |
|---|
| 21 | TITLE = '#geo reference' + "\n" # this title is referred to in the test format |
|---|
| 22 | |
|---|
| 23 | DEFAULT_PROJECTION = 'UTM' |
|---|
| 24 | DEFAULT_DATUM = 'wgs84' |
|---|
| 25 | DEFAULT_UNITS = 'm' |
|---|
| 26 | DEFAULT_FALSE_EASTING = 500000 |
|---|
| 27 | DEFAULT_FALSE_NORTHING = 10000000 # Default for southern hemisphere |
|---|
| 28 | |
|---|
| 29 | |
|---|
| 30 | ## |
|---|
| 31 | # @brief A class for ... |
|---|
| 32 | class Geo_reference: |
|---|
| 33 | """ |
|---|
| 34 | Attributes of the Geo_reference class: |
|---|
| 35 | .zone The UTM zone (default is -1) |
|---|
| 36 | .false_easting ?? |
|---|
| 37 | .false_northing ?? |
|---|
| 38 | .datum The Datum used (default is wgs84) |
|---|
| 39 | .projection The projection used (default is 'UTM') |
|---|
| 40 | .units The units of measure used (default metres) |
|---|
| 41 | .xllcorner The X coord of origin (default is 0.0 wrt UTM grid) |
|---|
| 42 | .yllcorner The y coord of origin (default is 0.0 wrt UTM grid) |
|---|
| 43 | .is_absolute ?? |
|---|
| 44 | |
|---|
| 45 | """ |
|---|
| 46 | |
|---|
| 47 | ## |
|---|
| 48 | # @brief Instantiate an instance of class Geo_reference. |
|---|
| 49 | # @param zone The UTM zone. |
|---|
| 50 | # @param xllcorner X coord of origin of georef. |
|---|
| 51 | # @param yllcorner Y coord of origin of georef. |
|---|
| 52 | # @param datum ?? |
|---|
| 53 | # @param projection The projection used (default UTM). |
|---|
| 54 | # @param units Units used in measuring distance (default m). |
|---|
| 55 | # @param false_easting ?? |
|---|
| 56 | # @param false_northing ?? |
|---|
| 57 | # @param NetCDFObject NetCDF file *handle* to write to. |
|---|
| 58 | # @param ASCIIFile ASCII text file *handle* to write to. |
|---|
| 59 | # @param read_title Title of the georeference text. |
|---|
| 60 | def __init__(self, |
|---|
| 61 | zone=DEFAULT_ZONE, |
|---|
| 62 | xllcorner=0.0, |
|---|
| 63 | yllcorner=0.0, |
|---|
| 64 | datum=DEFAULT_DATUM, |
|---|
| 65 | projection=DEFAULT_PROJECTION, |
|---|
| 66 | units=DEFAULT_UNITS, |
|---|
| 67 | false_easting=DEFAULT_FALSE_EASTING, |
|---|
| 68 | false_northing=DEFAULT_FALSE_NORTHING, |
|---|
| 69 | NetCDFObject=None, |
|---|
| 70 | ASCIIFile=None, |
|---|
| 71 | read_title=None): |
|---|
| 72 | """ |
|---|
| 73 | input: |
|---|
| 74 | NetCDFObject - a handle to the netCDF file to be written to |
|---|
| 75 | ASCIIFile - a handle to the text file |
|---|
| 76 | read_title - the title of the georeference text, if it was read in. |
|---|
| 77 | If the function that calls this has already read the title line, |
|---|
| 78 | it can't unread it, so this info has to be passed. |
|---|
| 79 | If you know of a way to unread this info, then tell us. |
|---|
| 80 | |
|---|
| 81 | Note, the text file only saves a sub set of the info the |
|---|
| 82 | points file does. Currently the info not written in text |
|---|
| 83 | must be the default info, since ANUGA assumes it isn't |
|---|
| 84 | changing. |
|---|
| 85 | """ |
|---|
| 86 | |
|---|
| 87 | if zone is None: |
|---|
| 88 | zone = DEFAULT_ZONE |
|---|
| 89 | self.false_easting = false_easting |
|---|
| 90 | self.false_northing = false_northing |
|---|
| 91 | self.datum = datum |
|---|
| 92 | self.projection = projection |
|---|
| 93 | self.zone = zone |
|---|
| 94 | self.units = units |
|---|
| 95 | self.xllcorner = xllcorner |
|---|
| 96 | self.yllcorner = yllcorner |
|---|
| 97 | |
|---|
| 98 | if NetCDFObject is not None: |
|---|
| 99 | self.read_NetCDF(NetCDFObject) |
|---|
| 100 | |
|---|
| 101 | if ASCIIFile is not None: |
|---|
| 102 | self.read_ASCII(ASCIIFile, read_title=read_title) |
|---|
| 103 | |
|---|
| 104 | |
|---|
| 105 | # Set flag for absolute points (used by get_absolute) |
|---|
| 106 | self.absolute = num.allclose([self.xllcorner, self.yllcorner], 0) |
|---|
| 107 | |
|---|
| 108 | |
|---|
| 109 | def get_xllcorner(self): |
|---|
| 110 | return self.xllcorner |
|---|
| 111 | |
|---|
| 112 | ## |
|---|
| 113 | # @brief Get the Y coordinate of the origin of this georef. |
|---|
| 114 | def get_yllcorner(self): |
|---|
| 115 | return self.yllcorner |
|---|
| 116 | |
|---|
| 117 | ## |
|---|
| 118 | # @brief Get the zone of this georef. |
|---|
| 119 | def get_zone(self): |
|---|
| 120 | return self.zone |
|---|
| 121 | |
|---|
| 122 | ## |
|---|
| 123 | # @brief Write <something> to an open NetCDF file. |
|---|
| 124 | # @param outfile Handle to open NetCDF file. |
|---|
| 125 | def write_NetCDF(self, outfile): |
|---|
| 126 | outfile.xllcorner = self.xllcorner |
|---|
| 127 | outfile.yllcorner = self.yllcorner |
|---|
| 128 | outfile.zone = self.zone |
|---|
| 129 | |
|---|
| 130 | outfile.false_easting = self.false_easting |
|---|
| 131 | outfile.false_northing = self.false_northing |
|---|
| 132 | |
|---|
| 133 | outfile.datum = self.datum |
|---|
| 134 | outfile.projection = self.projection |
|---|
| 135 | outfile.units = self.units |
|---|
| 136 | |
|---|
| 137 | ## |
|---|
| 138 | # @brief Read data from an open NetCDF file. |
|---|
| 139 | # @param infile Handle to open NetCDF file. |
|---|
| 140 | def read_NetCDF(self, infile): |
|---|
| 141 | self.xllcorner = infile.xllcorner[0] |
|---|
| 142 | self.yllcorner = infile.yllcorner[0] |
|---|
| 143 | self.zone = infile.zone[0] |
|---|
| 144 | |
|---|
| 145 | # Fix some assertion failures |
|---|
| 146 | if isinstance(self.zone, num.ndarray) and self.zone.shape == (): |
|---|
| 147 | self.zone = self.zone[0] |
|---|
| 148 | if (isinstance(self.xllcorner, num.ndarray) and |
|---|
| 149 | self.xllcorner.shape == ()): |
|---|
| 150 | self.xllcorner = self.xllcorner[0] |
|---|
| 151 | if (isinstance(self.yllcorner, num.ndarray) and |
|---|
| 152 | self.yllcorner.shape == ()): |
|---|
| 153 | self.yllcorner = self.yllcorner[0] |
|---|
| 154 | |
|---|
| 155 | assert (self.xllcorner.dtype.kind in num.typecodes['Float'] or |
|---|
| 156 | self.xllcorner.dtype.kind in num.typecodes['Integer']) |
|---|
| 157 | assert (self.yllcorner.dtype.kind in num.typecodes['Float'] or |
|---|
| 158 | self.yllcorner.dtype.kind in num.typecodes['Integer']) |
|---|
| 159 | assert (self.zone.dtype.kind in num.typecodes['Integer']) |
|---|
| 160 | |
|---|
| 161 | try: |
|---|
| 162 | self.false_easting = infile.false_easting[0] |
|---|
| 163 | self.false_northing = infile.false_northing[0] |
|---|
| 164 | |
|---|
| 165 | self.datum = infile.datum |
|---|
| 166 | self.projection = infile.projection |
|---|
| 167 | self.units = infile.units |
|---|
| 168 | except: |
|---|
| 169 | pass |
|---|
| 170 | |
|---|
| 171 | if self.false_easting != DEFAULT_FALSE_EASTING: |
|---|
| 172 | print "WARNING: False easting of %f specified." % self.false_easting |
|---|
| 173 | print "Default false easting is %f." % DEFAULT_FALSE_EASTING |
|---|
| 174 | print "ANUGA does not correct for differences in False Eastings." |
|---|
| 175 | |
|---|
| 176 | if self.false_northing != DEFAULT_FALSE_NORTHING: |
|---|
| 177 | print ("WARNING: False northing of %f specified." |
|---|
| 178 | % self.false_northing) |
|---|
| 179 | print "Default false northing is %f." % DEFAULT_FALSE_NORTHING |
|---|
| 180 | print "ANUGA does not correct for differences in False Northings." |
|---|
| 181 | |
|---|
| 182 | if self.datum.upper() != DEFAULT_DATUM.upper(): |
|---|
| 183 | print "WARNING: Datum of %s specified." % self.datum |
|---|
| 184 | print "Default Datum is %s." % DEFAULT_DATUM |
|---|
| 185 | print "ANUGA does not correct for differences in datums." |
|---|
| 186 | |
|---|
| 187 | if self.projection.upper() != DEFAULT_PROJECTION.upper(): |
|---|
| 188 | print "WARNING: Projection of %s specified." % self.projection |
|---|
| 189 | print "Default Projection is %s." % DEFAULT_PROJECTION |
|---|
| 190 | print "ANUGA does not correct for differences in Projection." |
|---|
| 191 | |
|---|
| 192 | if self.units.upper() != DEFAULT_UNITS.upper(): |
|---|
| 193 | print "WARNING: Units of %s specified." % self.units |
|---|
| 194 | print "Default units is %s." % DEFAULT_UNITS |
|---|
| 195 | print "ANUGA does not correct for differences in units." |
|---|
| 196 | |
|---|
| 197 | ################################################################################ |
|---|
| 198 | # ASCII files with geo-refs are currently not used |
|---|
| 199 | ################################################################################ |
|---|
| 200 | |
|---|
| 201 | ## |
|---|
| 202 | # @brief Write georef data to an open text file. |
|---|
| 203 | # @param fd Handle to open text file. |
|---|
| 204 | def write_ASCII(self, fd): |
|---|
| 205 | fd.write(TITLE) |
|---|
| 206 | fd.write(str(self.zone) + "\n") |
|---|
| 207 | fd.write(str(self.xllcorner) + "\n") |
|---|
| 208 | fd.write(str(self.yllcorner) + "\n") |
|---|
| 209 | |
|---|
| 210 | ## |
|---|
| 211 | # @brief Read georef data from an open text file. |
|---|
| 212 | # @param fd Handle to open text file. |
|---|
| 213 | def read_ASCII(self, fd, read_title=None): |
|---|
| 214 | try: |
|---|
| 215 | if read_title == None: |
|---|
| 216 | read_title = fd.readline() # remove the title line |
|---|
| 217 | if read_title[0:2].upper() != TITLE[0:2].upper(): |
|---|
| 218 | msg = ('File error. Expecting line: %s. Got this line: %s' |
|---|
| 219 | % (TITLE, read_title)) |
|---|
| 220 | raise TitleError, msg |
|---|
| 221 | self.zone = int(fd.readline()) |
|---|
| 222 | self.xllcorner = float(fd.readline()) |
|---|
| 223 | self.yllcorner = float(fd.readline()) |
|---|
| 224 | except SyntaxError: |
|---|
| 225 | msg = 'File error. Got syntax error while parsing geo reference' |
|---|
| 226 | raise ParsingError, msg |
|---|
| 227 | |
|---|
| 228 | # Fix some assertion failures |
|---|
| 229 | if isinstance(self.zone, num.ndarray) and self.zone.shape == (): |
|---|
| 230 | self.zone = self.zone[0] |
|---|
| 231 | if (isinstance(self.xllcorner, num.ndarray) and |
|---|
| 232 | self.xllcorner.shape == ()): |
|---|
| 233 | self.xllcorner = self.xllcorner[0] |
|---|
| 234 | if (isinstance(self.yllcorner, num.ndarray) and |
|---|
| 235 | self.yllcorner.shape == ()): |
|---|
| 236 | self.yllcorner = self.yllcorner[0] |
|---|
| 237 | |
|---|
| 238 | assert (type(self.xllcorner) == types.FloatType) |
|---|
| 239 | assert (type(self.yllcorner) == types.FloatType) |
|---|
| 240 | assert (type(self.zone) == types.IntType) |
|---|
| 241 | |
|---|
| 242 | ################################################################################ |
|---|
| 243 | |
|---|
| 244 | ## |
|---|
| 245 | # @brief Change points to be absolute wrt new georef 'points_geo_ref'. |
|---|
| 246 | # @param points The points to change. |
|---|
| 247 | # @param points_geo_ref The new georef to make points absolute wrt. |
|---|
| 248 | # @return The changed points. |
|---|
| 249 | # @note If 'points' is a list then a changed list is returned. |
|---|
| 250 | def change_points_geo_ref(self, points, points_geo_ref=None): |
|---|
| 251 | """Change the geo reference of a list or Numeric array of points to |
|---|
| 252 | be this reference.(The reference used for this object) |
|---|
| 253 | If the points do not have a geo ref, assume 'absolute' values |
|---|
| 254 | """ |
|---|
| 255 | import copy |
|---|
| 256 | |
|---|
| 257 | # remember if we got a list |
|---|
| 258 | is_list = isinstance(points, list) |
|---|
| 259 | |
|---|
| 260 | #points = ensure_numeric(copy.copy(points), num.float) |
|---|
| 261 | points = ensure_numeric(points, num.float) |
|---|
| 262 | |
|---|
| 263 | # sanity checks |
|---|
| 264 | if len(points.shape) == 1: |
|---|
| 265 | #One point has been passed |
|---|
| 266 | msg = 'Single point must have two elements' |
|---|
| 267 | assert len(points) == 2, msg |
|---|
| 268 | points = num.reshape(points, (1,2)) |
|---|
| 269 | |
|---|
| 270 | msg = 'Points array must be two dimensional.\n' |
|---|
| 271 | msg += 'I got %d dimensions' %len(points.shape) |
|---|
| 272 | assert len(points.shape) == 2, msg |
|---|
| 273 | |
|---|
| 274 | msg = 'Input must be an N x 2 array or list of (x,y) values. ' |
|---|
| 275 | msg += 'I got an %d x %d array' %points.shape |
|---|
| 276 | assert points.shape[1] == 2, msg |
|---|
| 277 | |
|---|
| 278 | # FIXME (Ole): Could also check if zone, xllcorner, yllcorner |
|---|
| 279 | # are identical in the two geo refs. |
|---|
| 280 | if points_geo_ref is not self: |
|---|
| 281 | # If georeferences are different |
|---|
| 282 | points = copy.copy(points) # Don't destroy input |
|---|
| 283 | if not points_geo_ref is None: |
|---|
| 284 | # Convert points to absolute coordinates |
|---|
| 285 | points[:,0] += points_geo_ref.xllcorner |
|---|
| 286 | points[:,1] += points_geo_ref.yllcorner |
|---|
| 287 | |
|---|
| 288 | # Make points relative to primary geo reference |
|---|
| 289 | points[:,0] -= self.xllcorner |
|---|
| 290 | points[:,1] -= self.yllcorner |
|---|
| 291 | |
|---|
| 292 | if is_list: |
|---|
| 293 | points = points.tolist() |
|---|
| 294 | |
|---|
| 295 | return points |
|---|
| 296 | |
|---|
| 297 | def is_absolute(self): |
|---|
| 298 | """Return True if xllcorner==yllcorner==0 indicating that points |
|---|
| 299 | in question are absolute. |
|---|
| 300 | """ |
|---|
| 301 | |
|---|
| 302 | # FIXME(Ole): It is unfortunate that decision about whether points |
|---|
| 303 | # are absolute or not lies with the georeference object. Ross pointed this out. |
|---|
| 304 | # Moreover, this little function is responsible for a large fraction of the time |
|---|
| 305 | # using in data fitting (something in like 40 - 50%. |
|---|
| 306 | # This was due to the repeated calls to allclose. |
|---|
| 307 | # With the flag method fitting is much faster (18 Mar 2009). |
|---|
| 308 | |
|---|
| 309 | # FIXME(Ole): HACK to be able to reuse data already cached (18 Mar 2009). |
|---|
| 310 | # Remove at some point |
|---|
| 311 | if not hasattr(self, 'absolute'): |
|---|
| 312 | self.absolute = num.allclose([self.xllcorner, self.yllcorner], 0) |
|---|
| 313 | |
|---|
| 314 | # Return absolute flag |
|---|
| 315 | return self.absolute |
|---|
| 316 | |
|---|
| 317 | def get_absolute(self, points): |
|---|
| 318 | """Given a set of points geo referenced to this instance, |
|---|
| 319 | return the points as absolute values. |
|---|
| 320 | """ |
|---|
| 321 | |
|---|
| 322 | is_list = False |
|---|
| 323 | if type(points) == types.ListType: |
|---|
| 324 | is_list = True |
|---|
| 325 | |
|---|
| 326 | points = ensure_numeric(points, num.float) |
|---|
| 327 | if len(points.shape) == 1: |
|---|
| 328 | # One point has been passed |
|---|
| 329 | msg = 'Single point must have two elements' |
|---|
| 330 | if not len(points) == 2: |
|---|
| 331 | raise ShapeError, msg |
|---|
| 332 | |
|---|
| 333 | |
|---|
| 334 | msg = 'Input must be an N x 2 array or list of (x,y) values. ' |
|---|
| 335 | msg += 'I got an %d x %d array' %points.shape |
|---|
| 336 | if not points.shape[1] == 2: |
|---|
| 337 | raise ShapeError, msg |
|---|
| 338 | |
|---|
| 339 | |
|---|
| 340 | # Add geo ref to points |
|---|
| 341 | if not self.is_absolute(): |
|---|
| 342 | points = copy.copy(points) # Don't destroy input |
|---|
| 343 | points[:,0] += self.xllcorner |
|---|
| 344 | points[:,1] += self.yllcorner |
|---|
| 345 | |
|---|
| 346 | |
|---|
| 347 | if is_list: |
|---|
| 348 | points = points.tolist() |
|---|
| 349 | |
|---|
| 350 | return points |
|---|
| 351 | |
|---|
| 352 | ## |
|---|
| 353 | # @brief Convert points to relative measurement. |
|---|
| 354 | # @param points Points to convert to relative measurements. |
|---|
| 355 | # @return A set of points relative to the geo_reference instance. |
|---|
| 356 | def get_relative(self, points): |
|---|
| 357 | """Given a set of points in absolute UTM coordinates, |
|---|
| 358 | make them relative to this geo_reference instance, |
|---|
| 359 | return the points as relative values. |
|---|
| 360 | |
|---|
| 361 | This is the inverse of get_absolute. |
|---|
| 362 | """ |
|---|
| 363 | |
|---|
| 364 | # remember if we got a list |
|---|
| 365 | is_list = isinstance(points, list) |
|---|
| 366 | |
|---|
| 367 | points = ensure_numeric(points, num.float) |
|---|
| 368 | if len(points.shape) == 1: |
|---|
| 369 | #One point has been passed |
|---|
| 370 | msg = 'Single point must have two elements' |
|---|
| 371 | if not len(points) == 2: |
|---|
| 372 | raise ShapeError, msg |
|---|
| 373 | |
|---|
| 374 | if not points.shape[1] == 2: |
|---|
| 375 | msg = ('Input must be an N x 2 array or list of (x,y) values. ' |
|---|
| 376 | 'I got an %d x %d array' % points.shape) |
|---|
| 377 | raise ShapeError, msg |
|---|
| 378 | |
|---|
| 379 | # Subtract geo ref from points |
|---|
| 380 | if not self.is_absolute(): |
|---|
| 381 | points = copy.copy(points) # Don't destroy input |
|---|
| 382 | points[:,0] -= self.xllcorner |
|---|
| 383 | points[:,1] -= self.yllcorner |
|---|
| 384 | |
|---|
| 385 | if is_list: |
|---|
| 386 | points = points.tolist() |
|---|
| 387 | |
|---|
| 388 | return points |
|---|
| 389 | |
|---|
| 390 | ## |
|---|
| 391 | # @brief ?? |
|---|
| 392 | # @param other ?? |
|---|
| 393 | def reconcile_zones(self, other): |
|---|
| 394 | if other is None: |
|---|
| 395 | other = Geo_reference() |
|---|
| 396 | if (self.zone == other.zone or |
|---|
| 397 | self.zone == DEFAULT_ZONE and |
|---|
| 398 | other.zone == DEFAULT_ZONE): |
|---|
| 399 | pass |
|---|
| 400 | elif self.zone == DEFAULT_ZONE: |
|---|
| 401 | self.zone = other.zone |
|---|
| 402 | elif other.zone == DEFAULT_ZONE: |
|---|
| 403 | other.zone = self.zone |
|---|
| 404 | else: |
|---|
| 405 | msg = ('Geospatial data must be in the same ' |
|---|
| 406 | 'ZONE to allow reconciliation. I got zone %d and %d' |
|---|
| 407 | % (self.zone, other.zone)) |
|---|
| 408 | raise ANUGAError, msg |
|---|
| 409 | |
|---|
| 410 | #def easting_northing2geo_reffed_point(self, x, y): |
|---|
| 411 | # return [x-self.xllcorner, y - self.xllcorner] |
|---|
| 412 | |
|---|
| 413 | #def easting_northing2geo_reffed_points(self, x, y): |
|---|
| 414 | # return [x-self.xllcorner, y - self.xllcorner] |
|---|
| 415 | |
|---|
| 416 | ## |
|---|
| 417 | # @brief Get origin of this geo_reference. |
|---|
| 418 | # @return (zone, xllcorner, yllcorner). |
|---|
| 419 | def get_origin(self): |
|---|
| 420 | return (self.zone, self.xllcorner, self.yllcorner) |
|---|
| 421 | |
|---|
| 422 | ## |
|---|
| 423 | # @brief Get a string representation of this geo_reference instance. |
|---|
| 424 | def __repr__(self): |
|---|
| 425 | return ('(zone=%i easting=%f, northing=%f)' |
|---|
| 426 | % (self.zone, self.xllcorner, self.yllcorner)) |
|---|
| 427 | |
|---|
| 428 | ## |
|---|
| 429 | # @brief Compare two geo_reference instances. |
|---|
| 430 | # @param self This geo_reference instance. |
|---|
| 431 | # @param other Another geo_reference instance to compare against. |
|---|
| 432 | # @return 0 if instances have the same attributes, else 1. |
|---|
| 433 | # @note Attributes are: zone, xllcorner, yllcorner. |
|---|
| 434 | def __cmp__(self, other): |
|---|
| 435 | # FIXME (DSG) add a tolerence |
|---|
| 436 | if other is None: |
|---|
| 437 | return 1 |
|---|
| 438 | cmp = 0 |
|---|
| 439 | if not (self.xllcorner == self.xllcorner): |
|---|
| 440 | cmp = 1 |
|---|
| 441 | if not (self.yllcorner == self.yllcorner): |
|---|
| 442 | cmp = 1 |
|---|
| 443 | if not (self.zone == self.zone): |
|---|
| 444 | cmp = 1 |
|---|
| 445 | return cmp |
|---|
| 446 | |
|---|
| 447 | |
|---|
| 448 | ## |
|---|
| 449 | # @brief Write a geo_reference to a NetCDF file (usually SWW). |
|---|
| 450 | # @param origin A georef instance or parameters to create a georef instance. |
|---|
| 451 | # @param outfile Path to file to write. |
|---|
| 452 | # @return A normalized geo_reference. |
|---|
| 453 | def write_NetCDF_georeference(origin, outfile): |
|---|
| 454 | """Write georeference info to a netcdf file, usually sww. |
|---|
| 455 | |
|---|
| 456 | The origin can be a georef instance or parameters for a geo_ref instance |
|---|
| 457 | |
|---|
| 458 | outfile is the name of the file to be written to. |
|---|
| 459 | """ |
|---|
| 460 | |
|---|
| 461 | geo_ref = ensure_geo_reference(origin) |
|---|
| 462 | geo_ref.write_NetCDF(outfile) |
|---|
| 463 | return geo_ref |
|---|
| 464 | |
|---|
| 465 | |
|---|
| 466 | ## |
|---|
| 467 | # @brief Convert an object to a georeference instance. |
|---|
| 468 | # @param origin A georef instance or (zone, xllcorner, yllcorner) |
|---|
| 469 | # @return A georef object, or None if 'origin' was None. |
|---|
| 470 | def ensure_geo_reference(origin): |
|---|
| 471 | """ |
|---|
| 472 | Given a list/tuple of zone, xllcorner and yllcorner of a geo-ref object, |
|---|
| 473 | return a geo ref object. |
|---|
| 474 | |
|---|
| 475 | If the origin is None, return None, so calling this function doesn't |
|---|
| 476 | effect code logic |
|---|
| 477 | """ |
|---|
| 478 | |
|---|
| 479 | if isinstance(origin, Geo_reference): |
|---|
| 480 | geo_ref = origin |
|---|
| 481 | elif origin is None: |
|---|
| 482 | geo_ref = None |
|---|
| 483 | else: |
|---|
| 484 | geo_ref = apply(Geo_reference, origin) |
|---|
| 485 | |
|---|
| 486 | return geo_ref |
|---|
| 487 | |
|---|
| 488 | |
|---|
| 489 | #----------------------------------------------------------------------- |
|---|
| 490 | |
|---|
| 491 | if __name__ == "__main__": |
|---|
| 492 | pass |
|---|
