author | Lennard de Rijk <ljvderijk@gmail.com> |
Mon, 25 May 2009 01:56:09 +0200 | |
changeset 2337 | c05443664e3b |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
323
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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1 |
from datetime import date |
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Load ../vendor/django into trunk/app/django.
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2 |
from ctypes import c_char, c_char_p, c_double, c_int, c_ubyte, c_void_p, POINTER |
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3 |
from django.contrib.gis.gdal.envelope import OGREnvelope |
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4 |
from django.contrib.gis.gdal.libgdal import lgdal, gdal_version |
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from django.contrib.gis.gdal.prototypes.errcheck import check_bool, check_envelope |
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6 |
from django.contrib.gis.gdal.prototypes.generation import \ |
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7 |
const_string_output, double_output, geom_output, int_output, \ |
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8 |
srs_output, string_output, void_output |
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9 |
|
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10 |
# Some prototypes need to be aware of what version GDAL we have. |
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11 |
major, minor = map(int, gdal_version().split('.')[:2]) |
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12 |
if major <= 1 and minor <= 4: |
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13 |
GEOJSON = False |
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14 |
else: |
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15 |
GEOJSON = True |
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16 |
|
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17 |
### Generation routines specific to this module ### |
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18 |
def env_func(f, argtypes): |
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19 |
"For getting OGREnvelopes." |
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f.argtypes = argtypes |
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f.restype = None |
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22 |
f.errcheck = check_envelope |
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23 |
return f |
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24 |
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25 |
def pnt_func(f): |
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26 |
"For accessing point information." |
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27 |
return double_output(f, [c_void_p, c_int]) |
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|
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def topology_func(f): |
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f.argtypes = [c_void_p, c_void_p] |
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31 |
f.restype = c_int |
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32 |
f.errchck = check_bool |
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33 |
return f |
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34 |
|
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35 |
### OGR_G ctypes function prototypes ### |
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36 |
|
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37 |
# GeoJSON routines, if supported. |
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38 |
if GEOJSON: |
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39 |
from_json = geom_output(lgdal.OGR_G_CreateGeometryFromJson, [c_char_p]) |
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40 |
to_json = string_output(lgdal.OGR_G_ExportToJson, [c_void_p], str_result=True) |
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41 |
else: |
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42 |
from_json = False |
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43 |
to_json = False |
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44 |
|
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45 |
# GetX, GetY, GetZ all return doubles. |
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46 |
getx = pnt_func(lgdal.OGR_G_GetX) |
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gety = pnt_func(lgdal.OGR_G_GetY) |
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48 |
getz = pnt_func(lgdal.OGR_G_GetZ) |
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49 |
|
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50 |
# Geometry creation routines. |
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51 |
from_wkb = geom_output(lgdal.OGR_G_CreateFromWkb, [c_char_p, c_void_p, POINTER(c_void_p), c_int], offset=-2) |
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52 |
from_wkt = geom_output(lgdal.OGR_G_CreateFromWkt, [POINTER(c_char_p), c_void_p, POINTER(c_void_p)], offset=-1) |
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parents:
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53 |
create_geom = geom_output(lgdal.OGR_G_CreateGeometry, [c_int]) |
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54 |
clone_geom = geom_output(lgdal.OGR_G_Clone, [c_void_p]) |
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55 |
get_geom_ref = geom_output(lgdal.OGR_G_GetGeometryRef, [c_void_p, c_int]) |
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get_boundary = geom_output(lgdal.OGR_G_GetBoundary, [c_void_p]) |
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57 |
geom_convex_hull = geom_output(lgdal.OGR_G_ConvexHull, [c_void_p]) |
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58 |
geom_diff = geom_output(lgdal.OGR_G_Difference, [c_void_p, c_void_p]) |
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59 |
geom_intersection = geom_output(lgdal.OGR_G_Intersection, [c_void_p, c_void_p]) |
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60 |
geom_sym_diff = geom_output(lgdal.OGR_G_SymmetricDifference, [c_void_p, c_void_p]) |
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61 |
geom_union = geom_output(lgdal.OGR_G_Union, [c_void_p, c_void_p]) |
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62 |
|
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63 |
# Geometry modification routines. |
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64 |
add_geom = void_output(lgdal.OGR_G_AddGeometry, [c_void_p, c_void_p]) |
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65 |
import_wkt = void_output(lgdal.OGR_G_ImportFromWkt, [c_void_p, POINTER(c_char_p)]) |
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66 |
|
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67 |
# Destroys a geometry |
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68 |
destroy_geom = void_output(lgdal.OGR_G_DestroyGeometry, [c_void_p], errcheck=False) |
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69 |
|
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70 |
# Geometry export routines. |
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71 |
to_wkb = void_output(lgdal.OGR_G_ExportToWkb, None, errcheck=True) # special handling for WKB. |
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72 |
to_wkt = string_output(lgdal.OGR_G_ExportToWkt, [c_void_p, POINTER(c_char_p)]) |
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73 |
to_gml = string_output(lgdal.OGR_G_ExportToGML, [c_void_p], str_result=True) |
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74 |
get_wkbsize = int_output(lgdal.OGR_G_WkbSize, [c_void_p]) |
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75 |
|
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76 |
# Geometry spatial-reference related routines. |
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77 |
assign_srs = void_output(lgdal.OGR_G_AssignSpatialReference, [c_void_p, c_void_p], errcheck=False) |
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78 |
get_geom_srs = srs_output(lgdal.OGR_G_GetSpatialReference, [c_void_p]) |
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79 |
|
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80 |
# Geometry properties |
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81 |
get_area = double_output(lgdal.OGR_G_GetArea, [c_void_p]) |
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82 |
get_centroid = void_output(lgdal.OGR_G_Centroid, [c_void_p, c_void_p]) |
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83 |
get_dims = int_output(lgdal.OGR_G_GetDimension, [c_void_p]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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84 |
get_coord_dims = int_output(lgdal.OGR_G_GetCoordinateDimension, [c_void_p]) |
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85 |
|
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86 |
get_geom_count = int_output(lgdal.OGR_G_GetGeometryCount, [c_void_p]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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87 |
get_geom_name = const_string_output(lgdal.OGR_G_GetGeometryName, [c_void_p]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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88 |
get_geom_type = int_output(lgdal.OGR_G_GetGeometryType, [c_void_p]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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89 |
get_point_count = int_output(lgdal.OGR_G_GetPointCount, [c_void_p]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
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90 |
get_point = void_output(lgdal.OGR_G_GetPoint, [c_void_p, c_int, POINTER(c_double), POINTER(c_double), POINTER(c_double)], errcheck=False) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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91 |
geom_close_rings = void_output(lgdal.OGR_G_CloseRings, [c_void_p], errcheck=False) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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92 |
|
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93 |
# Topology routines. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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94 |
ogr_contains = topology_func(lgdal.OGR_G_Contains) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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95 |
ogr_crosses = topology_func(lgdal.OGR_G_Crosses) |
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parents:
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96 |
ogr_disjoint = topology_func(lgdal.OGR_G_Disjoint) |
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97 |
ogr_equals = topology_func(lgdal.OGR_G_Equals) |
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parents:
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changeset
|
98 |
ogr_intersects = topology_func(lgdal.OGR_G_Intersects) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
99 |
ogr_overlaps = topology_func(lgdal.OGR_G_Overlaps) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
100 |
ogr_touches = topology_func(lgdal.OGR_G_Touches) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
101 |
ogr_within = topology_func(lgdal.OGR_G_Within) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
102 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
103 |
# Transformation routines. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
104 |
geom_transform = void_output(lgdal.OGR_G_Transform, [c_void_p, c_void_p]) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
105 |
geom_transform_to = void_output(lgdal.OGR_G_TransformTo, [c_void_p, c_void_p]) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
106 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
107 |
# For retrieving the envelope of the geometry. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
108 |
get_envelope = env_func(lgdal.OGR_G_GetEnvelope, [c_void_p, POINTER(OGREnvelope)]) |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
diff
changeset
|
109 |