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
|
from ctypes import POINTER, c_char_p, c_double, c_int, c_void_p
from django.contrib.gis.gdal.envelope import OGREnvelope
from django.contrib.gis.gdal.libgdal import lgdal
from django.contrib.gis.gdal.prototypes.errcheck import check_envelope
from django.contrib.gis.gdal.prototypes.generation import (
bool_output,
const_string_output,
double_output,
geom_output,
int_output,
srs_output,
string_output,
void_output,
)
# ### Generation routines specific to this module ###
def env_func(f, argtypes):
"For getting OGREnvelopes."
f.argtypes = argtypes
f.restype = None
f.errcheck = check_envelope
return f
def pnt_func(f):
"For accessing point information."
return double_output(f, [c_void_p, c_int])
def topology_func(f):
f.argtypes = [c_void_p, c_void_p]
f.restype = c_int
f.errcheck = lambda result, func, cargs: bool(result)
return f
# ### OGR_G ctypes function prototypes ###
# GeoJSON routines.
from_json = geom_output(lgdal.OGR_G_CreateGeometryFromJson, [c_char_p])
to_json = string_output(
lgdal.OGR_G_ExportToJson, [c_void_p], str_result=True, decoding="ascii"
)
to_kml = string_output(
lgdal.OGR_G_ExportToKML, [c_void_p, c_char_p], str_result=True, decoding="ascii"
)
# GetX, GetY, GetZ all return doubles.
getx = pnt_func(lgdal.OGR_G_GetX)
gety = pnt_func(lgdal.OGR_G_GetY)
getz = pnt_func(lgdal.OGR_G_GetZ)
getm = pnt_func(lgdal.OGR_G_GetM)
# Geometry creation routines.
from_wkb = geom_output(
lgdal.OGR_G_CreateFromWkbEx,
[c_char_p, c_void_p, POINTER(c_void_p), c_int],
offset=-2,
)
from_wkt = geom_output(
lgdal.OGR_G_CreateFromWkt,
[POINTER(c_char_p), c_void_p, POINTER(c_void_p)],
offset=-1,
)
from_gml = geom_output(lgdal.OGR_G_CreateFromGML, [c_char_p])
create_geom = geom_output(lgdal.OGR_G_CreateGeometry, [c_int])
clone_geom = geom_output(lgdal.OGR_G_Clone, [c_void_p])
get_geom_ref = geom_output(lgdal.OGR_G_GetGeometryRef, [c_void_p, c_int])
get_boundary = geom_output(lgdal.OGR_G_GetBoundary, [c_void_p])
geom_convex_hull = geom_output(lgdal.OGR_G_ConvexHull, [c_void_p])
geom_diff = geom_output(lgdal.OGR_G_Difference, [c_void_p, c_void_p])
geom_intersection = geom_output(lgdal.OGR_G_Intersection, [c_void_p, c_void_p])
geom_sym_diff = geom_output(lgdal.OGR_G_SymmetricDifference, [c_void_p, c_void_p])
geom_union = geom_output(lgdal.OGR_G_Union, [c_void_p, c_void_p])
is_3d = bool_output(lgdal.OGR_G_Is3D, [c_void_p])
set_3d = void_output(lgdal.OGR_G_Set3D, [c_void_p, c_int], errcheck=False)
is_measured = bool_output(lgdal.OGR_G_IsMeasured, [c_void_p])
set_measured = void_output(lgdal.OGR_G_SetMeasured, [c_void_p, c_int], errcheck=False)
has_curve_geom = bool_output(lgdal.OGR_G_HasCurveGeometry, [c_void_p, c_int])
get_linear_geom = geom_output(
lgdal.OGR_G_GetLinearGeometry, [c_void_p, c_double, POINTER(c_char_p)]
)
get_curve_geom = geom_output(
lgdal.OGR_G_GetCurveGeometry, [c_void_p, POINTER(c_char_p)]
)
# Geometry modification routines.
add_geom = void_output(lgdal.OGR_G_AddGeometry, [c_void_p, c_void_p])
import_wkt = void_output(lgdal.OGR_G_ImportFromWkt, [c_void_p, POINTER(c_char_p)])
# Destroys a geometry
destroy_geom = void_output(lgdal.OGR_G_DestroyGeometry, [c_void_p], errcheck=False)
# Geometry export routines.
to_wkb = void_output(
lgdal.OGR_G_ExportToWkb, None, errcheck=True
) # special handling for WKB.
to_iso_wkb = void_output(lgdal.OGR_G_ExportToIsoWkb, None, errcheck=True)
to_wkt = string_output(
lgdal.OGR_G_ExportToWkt, [c_void_p, POINTER(c_char_p)], decoding="ascii"
)
to_iso_wkt = string_output(
lgdal.OGR_G_ExportToIsoWkt, [c_void_p, POINTER(c_char_p)], decoding="ascii"
)
to_gml = string_output(
lgdal.OGR_G_ExportToGML, [c_void_p], str_result=True, decoding="ascii"
)
get_wkbsize = int_output(lgdal.OGR_G_WkbSizeEx, [c_void_p])
# Geometry spatial-reference related routines.
assign_srs = void_output(
lgdal.OGR_G_AssignSpatialReference, [c_void_p, c_void_p], errcheck=False
)
get_geom_srs = srs_output(lgdal.OGR_G_GetSpatialReference, [c_void_p])
# Geometry properties
get_area = double_output(lgdal.OGR_G_GetArea, [c_void_p])
get_centroid = void_output(lgdal.OGR_G_Centroid, [c_void_p, c_void_p])
get_dims = int_output(lgdal.OGR_G_GetDimension, [c_void_p])
get_coord_dim = int_output(lgdal.OGR_G_CoordinateDimension, [c_void_p])
set_coord_dim = void_output(
lgdal.OGR_G_SetCoordinateDimension, [c_void_p, c_int], errcheck=False
)
is_empty = int_output(
lgdal.OGR_G_IsEmpty, [c_void_p], errcheck=lambda result, func, cargs: bool(result)
)
get_geom_count = int_output(lgdal.OGR_G_GetGeometryCount, [c_void_p])
get_geom_name = const_string_output(
lgdal.OGR_G_GetGeometryName, [c_void_p], decoding="ascii"
)
get_geom_type = int_output(lgdal.OGR_G_GetGeometryType, [c_void_p])
get_point_count = int_output(lgdal.OGR_G_GetPointCount, [c_void_p])
get_point = void_output(
lgdal.OGR_G_GetPointZM,
[
c_void_p,
c_int,
POINTER(c_double),
POINTER(c_double),
POINTER(c_double),
POINTER(c_double),
],
errcheck=False,
)
geom_close_rings = void_output(lgdal.OGR_G_CloseRings, [c_void_p], errcheck=False)
# Topology routines.
ogr_contains = topology_func(lgdal.OGR_G_Contains)
ogr_crosses = topology_func(lgdal.OGR_G_Crosses)
ogr_disjoint = topology_func(lgdal.OGR_G_Disjoint)
ogr_equals = topology_func(lgdal.OGR_G_Equals)
ogr_intersects = topology_func(lgdal.OGR_G_Intersects)
ogr_overlaps = topology_func(lgdal.OGR_G_Overlaps)
ogr_touches = topology_func(lgdal.OGR_G_Touches)
ogr_within = topology_func(lgdal.OGR_G_Within)
# Transformation routines.
geom_transform = void_output(lgdal.OGR_G_Transform, [c_void_p, c_void_p])
geom_transform_to = void_output(lgdal.OGR_G_TransformTo, [c_void_p, c_void_p])
# For retrieving the envelope of the geometry.
get_envelope = env_func(lgdal.OGR_G_GetEnvelope, [c_void_p, POINTER(OGREnvelope)])
|
