mirror of https://github.com/django/django.git
Fixed #16594 -- Added wkt 3D support for GEOS geometries
This requires GEOS >= 3.3.0 to function properly. On previous versions, the Z dimension will simply not appear in the wkt. Disabled OpenLayers editing for 3D geometries (unsupported).
This commit is contained in:
Claude Paroz
parent
8a92139d8a
commit
5e80571bf9
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@ -51,9 +51,10 @@ class GeoModelAdmin(ModelAdmin):
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def formfield_for_dbfield(self, db_field, **kwargs):
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"""
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Overloaded from ModelAdmin so that an OpenLayersWidget is used
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for viewing/editing GeometryFields.
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for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
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3D editing).
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"""
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if isinstance(db_field, models.GeometryField):
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if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
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request = kwargs.pop('request', None)
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# Setting the widget with the newly defined widget.
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kwargs['widget'] = self.get_map_widget(db_field)
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@ -382,7 +382,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
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@property
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def wkt(self):
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"Returns the WKT (Well-Known Text) representation of this Geometry."
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return wkt_w().write(self).decode()
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return wkt_w(self.hasz and 3 or 2).write(self).decode()
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@property
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def hex(self):
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@ -45,6 +45,18 @@ wkt_writer_write.argtypes = [WKT_WRITE_PTR, GEOM_PTR]
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wkt_writer_write.restype = geos_char_p
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wkt_writer_write.errcheck = check_string
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try:
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wkt_writer_get_outdim = GEOSFunc('GEOSWKTWriter_getOutputDimension')
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wkt_writer_get_outdim.argtypes = [WKT_WRITE_PTR]
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wkt_writer_get_outdim.restype = c_int
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wkt_writer_set_outdim = GEOSFunc('GEOSWKTWriter_setOutputDimension')
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wkt_writer_set_outdim.argtypes = [WKT_WRITE_PTR, c_int]
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except AttributeError:
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# GEOSWKTWriter_get/setOutputDimension has been introduced in GEOS 3.3.0
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# Always return 2 if not available
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wkt_writer_get_outdim = lambda ptr: 2
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wkt_writer_set_outdim = lambda ptr, dim: None
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### WKBReader routines ###
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wkb_reader_create = GEOSFunc('GEOSWKBReader_create')
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wkb_reader_create.restype = WKB_READ_PTR
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@ -151,6 +163,17 @@ class WKTWriter(IOBase):
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"Returns the WKT representation of the given geometry."
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return wkt_writer_write(self.ptr, geom.ptr)
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@property
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def outdim(self):
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return wkt_writer_get_outdim(self.ptr)
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@outdim.setter
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def outdim(self, new_dim):
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if not new_dim in (2, 3):
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raise ValueError('WKT output dimension must be 2 or 3')
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wkt_writer_set_outdim(self.ptr, new_dim)
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class WKBWriter(IOBase):
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_constructor = wkb_writer_create
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_destructor = wkb_writer_destroy
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@ -217,9 +240,10 @@ def wkt_r():
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thread_context.wkt_r = _WKTReader()
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return thread_context.wkt_r
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def wkt_w():
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def wkt_w(dim=2):
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if not thread_context.wkt_w:
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thread_context.wkt_w = WKTWriter()
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thread_context.wkt_w.outdim = dim
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return thread_context.wkt_w
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def wkb_r():
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@ -80,6 +80,7 @@ class GEOSTest(unittest.TestCase, TestDataMixin):
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"Testing WKT output."
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for g in self.geometries.wkt_out:
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geom = fromstr(g.wkt)
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if geom.hasz and geos_version_info()['version'] >= '3.3.0':
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self.assertEqual(g.ewkt, geom.wkt)
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def test_hex(self):
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@ -20,6 +20,7 @@
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],
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"wkt_out": [
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{"wkt": "POINT (110 130)", "ewkt": "POINT (110.0000000000000000 130.0000000000000000)", "kml": "<Point><coordinates>110.0,130.0,0</coordinates></Point>", "gml": "<gml:Point><gml:coordinates>110,130</gml:coordinates></gml:Point>"},
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{"wkt": "POINT (110 130 85)", "ewkt": "POINT Z (110.0000000000000000 130.0000000000000000 85.0000000000000000)", "kml": "<Point><coordinates>110.0,130.0,85.0</coordinates></Point>", "gml": "<gml:Point><gml:coordinates>110,130,85</gml:coordinates></gml:Point>"},
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{"wkt": "LINESTRING (40 40,50 130,130 130)", "ewkt": "LINESTRING (40.0000000000000000 40.0000000000000000, 50.0000000000000000 130.0000000000000000, 130.0000000000000000 130.0000000000000000)", "kml": "<LineString><coordinates>40.0,40.0,0 50.0,130.0,0 130.0,130.0,0</coordinates></LineString>", "gml": "<gml:LineString><gml:coordinates>40,40 50,130 130,130</gml:coordinates></gml:LineString>"},
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{"wkt": "POLYGON ((150 150,410 150,280 20,20 20,150 150),(170 120,330 120,260 50,100 50,170 120))", "ewkt": "POLYGON ((150.0000000000000000 150.0000000000000000, 410.0000000000000000 150.0000000000000000, 280.0000000000000000 20.0000000000000000, 20.0000000000000000 20.0000000000000000, 150.0000000000000000 150.0000000000000000), (170.0000000000000000 120.0000000000000000, 330.0000000000000000 120.0000000000000000, 260.0000000000000000 50.0000000000000000, 100.0000000000000000 50.0000000000000000, 170.0000000000000000 120.0000000000000000))", "kml": "<Polygon><outerBoundaryIs><LinearRing><coordinates>150.0,150.0,0 410.0,150.0,0 280.0,20.0,0 20.0,20.0,0 150.0,150.0,0</coordinates></LinearRing></outerBoundaryIs><innerBoundaryIs><LinearRing><coordinates>170.0,120.0,0 330.0,120.0,0 260.0,50.0,0 100.0,50.0,0 170.0,120.0,0</coordinates></LinearRing></innerBoundaryIs></Polygon>", "gml": "<gml:Polygon><gml:outerBoundaryIs><gml:LinearRing><gml:coordinates>150,150 410,150 280,20 20,20 150,150</gml:coordinates></gml:LinearRing></gml:outerBoundaryIs><gml:innerBoundaryIs><gml:LinearRing><gml:coordinates>170,120 330,120 260,50 100,50 170,120</gml:coordinates></gml:LinearRing></gml:innerBoundaryIs></gml:Polygon>"},
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{"wkt": "MULTIPOINT (10 80,110 170,110 120)", "ewkt": "MULTIPOINT (10.0000000000000000 80.0000000000000000, 110.0000000000000000 170.0000000000000000, 110.0000000000000000 120.0000000000000000)", "kml": "<MultiGeometry><Point><coordinates>10.0,80.0,0</coordinates></Point><Point><coordinates>110.0,170.0,0</coordinates></Point><Point><coordinates>110.0,120.0,0</coordinates></Point></MultiGeometry>", "gml": "<gml:MultiPoint><gml:pointMember><gml:Point><gml:coordinates>10,80</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>110,170</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>110,120</gml:coordinates></gml:Point></gml:pointMember></gml:MultiPoint>"},
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@ -29,6 +30,7 @@
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],
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"hex_wkt": [
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{"wkt": "POINT(0 1)", "hex": "01010000000000000000000000000000000000F03F"},
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{"wkt": "POINT(0 1 5)", "hex": "01010000800000000000000000000000000000F03F0000000000001440"},
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{"wkt": "LINESTRING(0 1, 2 3, 4 5)", "hex": "0102000000030000000000000000000000000000000000F03F0000000000000040000000000000084000000000000010400000000000001440"},
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{"wkt": "POLYGON((0 0, 10 0, 10 10, 0 10, 0 0))", "hex": "010300000001000000050000000000000000000000000000000000000000000000000024400000000000000000000000000000244000000000000024400000000000000000000000000000244000000000000000000000000000000000"},
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{"wkt": "MULTIPOINT(0 0, 10 0, 10 10, 0 10, 0 0)", "hex": "010400000005000000010100000000000000000000000000000000000000010100000000000000000024400000000000000000010100000000000000000024400000000000002440010100000000000000000000000000000000002440010100000000000000000000000000000000000000"},
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