-
Notifications
You must be signed in to change notification settings - Fork 303
/
geospatial_utils.py
435 lines (367 loc) · 12.4 KB
/
geospatial_utils.py
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
435
try:
import shapely
from shapely.geometry import (
MultiPolygon,
Polygon,
Point,
MultiPoint,
LineString,
MultiLineString,
)
except ImportError:
shapely = None
try:
import geojson
except ImportError:
geojson = None
import numpy as np
from flopy.utils.geometry import Shape, Collection
geojson_classes = {}
if geojson is not None:
geojson_classes = {
"polygon": geojson.Polygon,
"multipolygon": geojson.MultiPolygon,
"point": geojson.Point,
"multipoint": geojson.MultiPoint,
"linestring": geojson.LineString,
"multilinestring": geojson.MultiLineString,
}
shape_types = {
"multipolygon": "MultiPolygon",
"polygon": "Polygon",
"point": "Point",
"multipoint": "MultiPoint",
"linestring": "LineString",
"multilinestring": "MultiLineString",
}
class GeoSpatialUtil(object):
"""
Geospatial utils are a unifying method to provide conversion between
commonly used geospatial input types
Parameters
----------
obj : geospatial object
obj can accept any of the following objects:
shapefile.Shape object
flopy.utils.geometry objects
list of vertices
geojson geometry objects
shapely.geometry objects
shapetype : str
shapetype is required when a list of vertices is supplied for obj
"""
def __init__(self, obj, shapetype=None):
from ..export.shapefile_utils import import_shapefile
self.__shapefile = import_shapefile()
self.__obj = obj
self.__geo_interface = {}
self._geojson = None
self._shapely = None
self._shape = None
self._flopy_geometry = None
self._points = None
self.__shapetype = None
if shapetype is not None:
shapetype = shapetype.lower()
if isinstance(obj, self.__shapefile.Shape):
self.__geo_interface = self.__obj.__geo_interface__
elif isinstance(obj, (Shape, Collection)):
geo_interface = obj.__geo_interface__
if geo_interface["type"] == "GeometryCollection":
raise TypeError("GeometryCollections are not supported")
self.__geo_interface = geo_interface
elif isinstance(obj, (np.ndarray, list, tuple)):
if shapetype is None or shapetype not in shape_types:
err = "shapetype must be one of the following: " + " , ".join(
geojson_classes.keys()
)
raise AssertionError(err)
self.__geo_interface = {
"type": shape_types[shapetype],
"coordinates": list(obj),
}
if geojson is not None:
if isinstance(obj, geojson.Feature):
self.__geo_interface = {
"type": obj.geometry.type,
"coordinates": obj.geometry.coordinates,
}
elif isinstance(
obj,
(
geojson.Point,
geojson.MultiPoint,
geojson.Polygon,
geojson.MultiPolygon,
geojson.LineString,
geojson.MultiLineString,
),
):
self.__geo_interface = {
"type": obj.type,
"coordinates": obj.coordinates,
}
if shapely is not None:
if isinstance(
obj,
(
Point,
MultiPoint,
Polygon,
MultiPolygon,
LineString,
MultiLineString,
),
):
self.__geo_interface = obj.__geo_interface__
@property
def __geo_interface__(self):
"""
Geojson standard representation of a geometry
Returns
-------
dict
"""
return self.__geo_interface
@property
def shapetype(self):
"""
Shapetype string for a geometry
Returns
-------
str
"""
if self.__shapetype is None:
self.__shapetype = self.__geo_interface["type"]
return self.__shapetype
@property
def points(self):
"""
Returns a list of vertices to the user
Returns
-------
list
"""
if self._points is None:
self._points = self.__geo_interface["coordinates"]
return self._points
@property
def shapely(self):
"""
Returns a shapely.geometry object to the user
Returns
-------
shapely.geometry.<shape>
"""
if shapely is not None:
if self._shapely is None:
self._shapely = shapely.geometry.shape(self.__geo_interface)
return self._shapely
@property
def geojson(self):
"""
Returns a geojson object to the user
Returns
-------
geojson.<shape>
"""
if geojson is not None:
if self._geojson is None:
cls = geojson_classes[self.__geo_interface["type"].lower()]
self._geojson = cls(self.__geo_interface["coordinates"])
return self._geojson
@property
def shape(self):
"""
Returns a shapefile.Shape object to the user
Returns
-------
shapefile.shape
"""
if self._shape is None:
self._shape = self.__shapefile.Shape._from_geojson(
self.__geo_interface
)
return self._shape
@property
def flopy_geometry(self):
"""
Returns a flopy geometry object to the user
Returns
-------
flopy.utils.geometry.<Shape>
"""
if self._flopy_geometry is None:
self._flopy_geometry = Shape.from_geojson(self.__geo_interface)
return self._flopy_geometry
class GeoSpatialCollection(object):
"""
The GeoSpatialCollection class allows a user to convert between
Collection objects from common geospatial libraries.
Parameters
----------
obj : collection object
obj can accept the following types
str : shapefile name
shapefile.Reader object
list of [shapefile.Shape, shapefile.Shape,]
shapefile.Shapes object
flopy.utils.geometry.Collection object
list of [flopy.utils.geometry, ...] objects
geojson.GeometryCollection object
geojson.FeatureCollection object
shapely.GeometryCollection object
list of [[vertices], ...]
shapetype : list
optional list of shapetypes that is required when vertices are
supplied to the class as the obj parameter
"""
def __init__(self, obj, shapetype=None):
from ..export.shapefile_utils import import_shapefile
self.__shapefile = import_shapefile()
self.__obj = obj
self.__collection = []
self._geojson = None
self._shapely = None
self._shape = None
self._flopy_geometry = None
self._points = None
self.__shapetype = None
if isinstance(obj, str):
with self.__shapefile.Reader(obj) as r:
for shape in r.shapes():
self.__collection.append(GeoSpatialUtil(shape))
elif isinstance(obj, self.__shapefile.Reader):
for shape in obj.shapes():
self.__collection.append(GeoSpatialUtil(shape))
elif isinstance(obj, self.__shapefile.Shapes):
for shape in obj:
self.__collection.append(GeoSpatialUtil(shape))
elif isinstance(obj, Collection):
for shape in obj:
self.__collection.append(GeoSpatialUtil(shape))
elif isinstance(obj, (np.ndarray, list, tuple)):
if isinstance(obj[0], (Shape, Collection, self.__shapefile.Shape)):
for shape in obj:
self.__collection.append(GeoSpatialUtil(shape))
else:
if shapetype is None:
err = "a list of shapetypes must be provided"
raise AssertionError(err)
elif isinstance(shapetype, str):
shapetype = [shapetype] * len(obj)
for ix, geom in enumerate(obj):
self.__collection.append(
GeoSpatialUtil(geom, shapetype[ix])
)
if geojson is not None:
if isinstance(
obj,
(
geojson.GeometryCollection,
geojson.FeatureCollection,
geojson.MultiLineString,
geojson.MultiPoint,
geojson.MultiPolygon,
),
):
for geom in obj.geometries:
self.__collection.append(GeoSpatialUtil(geom))
if shapely is not None:
if isinstance(
obj,
(
shapely.geometry.collection.GeometryCollection,
MultiPoint,
MultiLineString,
MultiPolygon,
),
):
for geom in obj.geoms:
self.__collection.append(GeoSpatialUtil(geom))
def __iter__(self):
"""
Iterator method that allows the user to get a list of GeoSpatialUtil
objects from the GeoSpatialCollection object
Returns
-------
GeoSpatialUtil
"""
yield from self.__collection
@property
def shapetype(self):
"""
Returns a list of shapetypes to the user
Returns
-------
list of str
"""
if self.__shapetype is None:
self.__shapetype = [i.shapetype for i in self.__collection]
return self.__shapetype
@property
def points(self):
"""
Property returns a multidimensional list of vertices
Returns
-------
list of vertices
"""
if self._points is None:
self._points = [i.points for i in self.__collection]
return self._points
@property
def shapely(self):
"""
Property that returns a shapely.geometry.collection.GeometryCollection
object to the user
Returns
-------
shapely.geometry.collection.GeometryCollection object
"""
if shapely is not None:
if self._shapely is None:
self._shapely = shapely.geometry.collection.GeometryCollection(
[i.shapely for i in self.__collection]
)
return self._shapely
@property
def geojson(self):
"""
Property that returns a geojson.GeometryCollection object to the user
Returns
-------
geojson.GeometryCollection
"""
if geojson is not None:
if self._geojson is None:
self._geojson = geojson.GeometryCollection(
[i.geojson for i in self.__collection]
)
return self._geojson
@property
def shape(self):
"""
Property that returns a shapefile.Shapes object
Returns
-------
shapefile.Shapes object
"""
if self._shape is None:
self._shape = self.__shapefile.Shapes()
for geom in self.__collection:
self._shape.append(geom.shape)
return self._shape
@property
def flopy_geometry(self):
"""
Property that returns a flopy.util.geometry.Collection object
Returns
-------
flopy.util.geometry.Collectionnos object
"""
if self._flopy_geometry is None:
self._flopy_geometry = Collection(
[i.flopy_geometry for i in self.__collection]
)
return self._flopy_geometry