496 lines
20 KiB
Python
496 lines
20 KiB
Python
import unittest
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from django.contrib.gis.gdal import OGRGeometry, OGRGeomType, \
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OGRException, OGRIndexError, SpatialReference, CoordTransform, \
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gdal_version
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from django.contrib.gis.tests.geometries import *
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class OGRGeomTest(unittest.TestCase):
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"This tests the OGR Geometry."
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def test00a_geomtype(self):
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"Testing OGRGeomType object."
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# OGRGeomType should initialize on all these inputs.
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try:
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g = OGRGeomType(1)
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g = OGRGeomType(7)
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g = OGRGeomType('point')
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g = OGRGeomType('GeometrycollectioN')
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g = OGRGeomType('LINearrING')
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g = OGRGeomType('Unknown')
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except:
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self.fail('Could not create an OGRGeomType object!')
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# Should throw TypeError on this input
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self.assertRaises(OGRException, OGRGeomType, 23)
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self.assertRaises(OGRException, OGRGeomType, 'fooD')
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self.assertRaises(OGRException, OGRGeomType, 9)
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# Equivalence can take strings, ints, and other OGRGeomTypes
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self.assertEqual(True, OGRGeomType(1) == OGRGeomType(1))
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self.assertEqual(True, OGRGeomType(7) == 'GeometryCollection')
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self.assertEqual(True, OGRGeomType('point') == 'POINT')
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self.assertEqual(False, OGRGeomType('point') == 2)
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self.assertEqual(True, OGRGeomType('unknown') == 0)
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self.assertEqual(True, OGRGeomType(6) == 'MULtiPolyGON')
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self.assertEqual(False, OGRGeomType(1) != OGRGeomType('point'))
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self.assertEqual(True, OGRGeomType('POINT') != OGRGeomType(6))
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# Testing the Django field name equivalent property.
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self.assertEqual('PointField', OGRGeomType('Point').django)
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self.assertEqual('GeometryField', OGRGeomType('Unknown').django)
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self.assertEqual(None, OGRGeomType('none').django)
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# 'Geometry' initialization implies an unknown geometry type.
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gt = OGRGeomType('Geometry')
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self.assertEqual(0, gt.num)
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self.assertEqual('Unknown', gt.name)
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def test00b_geomtype_25d(self):
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"Testing OGRGeomType object with 25D types."
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wkb25bit = OGRGeomType.wkb25bit
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self.failUnless(OGRGeomType(wkb25bit + 1) == 'Point25D')
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self.failUnless(OGRGeomType('MultiLineString25D') == (5 + wkb25bit))
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self.assertEqual('GeometryCollectionField', OGRGeomType('GeometryCollection25D').django)
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def test01a_wkt(self):
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"Testing WKT output."
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for g in wkt_out:
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geom = OGRGeometry(g.wkt)
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self.assertEqual(g.wkt, geom.wkt)
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def test01a_ewkt(self):
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"Testing EWKT input/output."
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for ewkt_val in ('POINT (1 2 3)', 'LINEARRING (0 0,1 1,2 1,0 0)'):
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# First with ewkt output when no SRID in EWKT
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self.assertEqual(ewkt_val, OGRGeometry(ewkt_val).ewkt)
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# No test consumption with an SRID specified.
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ewkt_val = 'SRID=4326;%s' % ewkt_val
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geom = OGRGeometry(ewkt_val)
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self.assertEqual(ewkt_val, geom.ewkt)
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self.assertEqual(4326, geom.srs.srid)
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def test01b_gml(self):
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"Testing GML output."
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for g in wkt_out:
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geom = OGRGeometry(g.wkt)
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self.assertEqual(g.gml, geom.gml)
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def test01c_hex(self):
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"Testing HEX input/output."
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for g in hex_wkt:
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geom1 = OGRGeometry(g.wkt)
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self.assertEqual(g.hex, geom1.hex)
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# Constructing w/HEX
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geom2 = OGRGeometry(g.hex)
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self.assertEqual(geom1, geom2)
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def test01d_wkb(self):
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"Testing WKB input/output."
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from binascii import b2a_hex
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for g in hex_wkt:
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geom1 = OGRGeometry(g.wkt)
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wkb = geom1.wkb
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self.assertEqual(b2a_hex(wkb).upper(), g.hex)
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# Constructing w/WKB.
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geom2 = OGRGeometry(wkb)
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self.assertEqual(geom1, geom2)
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def test01e_json(self):
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"Testing GeoJSON input/output."
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from django.contrib.gis.gdal.prototypes.geom import GEOJSON
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if not GEOJSON: return
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for g in json_geoms:
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geom = OGRGeometry(g.wkt)
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if not hasattr(g, 'not_equal'):
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self.assertEqual(g.json, geom.json)
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self.assertEqual(g.json, geom.geojson)
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self.assertEqual(OGRGeometry(g.wkt), OGRGeometry(geom.json))
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def test02_points(self):
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"Testing Point objects."
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prev = OGRGeometry('POINT(0 0)')
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for p in points:
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if not hasattr(p, 'z'): # No 3D
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pnt = OGRGeometry(p.wkt)
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self.assertEqual(1, pnt.geom_type)
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self.assertEqual('POINT', pnt.geom_name)
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self.assertEqual(p.x, pnt.x)
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self.assertEqual(p.y, pnt.y)
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self.assertEqual((p.x, p.y), pnt.tuple)
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def test03_multipoints(self):
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"Testing MultiPoint objects."
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for mp in multipoints:
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mgeom1 = OGRGeometry(mp.wkt) # First one from WKT
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self.assertEqual(4, mgeom1.geom_type)
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self.assertEqual('MULTIPOINT', mgeom1.geom_name)
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mgeom2 = OGRGeometry('MULTIPOINT') # Creating empty multipoint
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mgeom3 = OGRGeometry('MULTIPOINT')
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for g in mgeom1:
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mgeom2.add(g) # adding each point from the multipoints
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mgeom3.add(g.wkt) # should take WKT as well
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self.assertEqual(mgeom1, mgeom2) # they should equal
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self.assertEqual(mgeom1, mgeom3)
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self.assertEqual(mp.points, mgeom2.tuple)
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self.assertEqual(mp.n_p, mgeom2.point_count)
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def test04_linestring(self):
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"Testing LineString objects."
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prev = OGRGeometry('POINT(0 0)')
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for ls in linestrings:
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linestr = OGRGeometry(ls.wkt)
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self.assertEqual(2, linestr.geom_type)
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self.assertEqual('LINESTRING', linestr.geom_name)
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self.assertEqual(ls.n_p, linestr.point_count)
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self.assertEqual(ls.tup, linestr.tuple)
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self.assertEqual(True, linestr == OGRGeometry(ls.wkt))
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self.assertEqual(True, linestr != prev)
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self.assertRaises(OGRIndexError, linestr.__getitem__, len(linestr))
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prev = linestr
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# Testing the x, y properties.
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x = [tmpx for tmpx, tmpy in ls.tup]
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y = [tmpy for tmpx, tmpy in ls.tup]
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self.assertEqual(x, linestr.x)
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self.assertEqual(y, linestr.y)
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def test05_multilinestring(self):
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"Testing MultiLineString objects."
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prev = OGRGeometry('POINT(0 0)')
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for mls in multilinestrings:
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mlinestr = OGRGeometry(mls.wkt)
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self.assertEqual(5, mlinestr.geom_type)
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self.assertEqual('MULTILINESTRING', mlinestr.geom_name)
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self.assertEqual(mls.n_p, mlinestr.point_count)
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self.assertEqual(mls.tup, mlinestr.tuple)
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self.assertEqual(True, mlinestr == OGRGeometry(mls.wkt))
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self.assertEqual(True, mlinestr != prev)
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prev = mlinestr
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for ls in mlinestr:
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self.assertEqual(2, ls.geom_type)
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self.assertEqual('LINESTRING', ls.geom_name)
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self.assertRaises(OGRIndexError, mlinestr.__getitem__, len(mlinestr))
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def test06_linearring(self):
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"Testing LinearRing objects."
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prev = OGRGeometry('POINT(0 0)')
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for rr in linearrings:
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lr = OGRGeometry(rr.wkt)
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#self.assertEqual(101, lr.geom_type.num)
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self.assertEqual('LINEARRING', lr.geom_name)
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self.assertEqual(rr.n_p, len(lr))
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self.assertEqual(True, lr == OGRGeometry(rr.wkt))
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self.assertEqual(True, lr != prev)
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prev = lr
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def test07a_polygons(self):
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"Testing Polygon objects."
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# Testing `from_bbox` class method
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bbox = (-180,-90,180,90)
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p = OGRGeometry.from_bbox( bbox )
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self.assertEqual(bbox, p.extent)
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prev = OGRGeometry('POINT(0 0)')
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for p in polygons:
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poly = OGRGeometry(p.wkt)
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self.assertEqual(3, poly.geom_type)
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self.assertEqual('POLYGON', poly.geom_name)
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self.assertEqual(p.n_p, poly.point_count)
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self.assertEqual(p.n_i + 1, len(poly))
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# Testing area & centroid.
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self.assertAlmostEqual(p.area, poly.area, 9)
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x, y = poly.centroid.tuple
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self.assertAlmostEqual(p.centroid[0], x, 9)
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self.assertAlmostEqual(p.centroid[1], y, 9)
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# Testing equivalence
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self.assertEqual(True, poly == OGRGeometry(p.wkt))
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self.assertEqual(True, poly != prev)
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if p.ext_ring_cs:
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ring = poly[0]
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self.assertEqual(p.ext_ring_cs, ring.tuple)
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self.assertEqual(p.ext_ring_cs, poly[0].tuple)
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self.assertEqual(len(p.ext_ring_cs), ring.point_count)
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for r in poly:
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self.assertEqual('LINEARRING', r.geom_name)
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def test07b_closepolygons(self):
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"Testing closing Polygon objects."
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# Both rings in this geometry are not closed.
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poly = OGRGeometry('POLYGON((0 0, 5 0, 5 5, 0 5), (1 1, 2 1, 2 2, 2 1))')
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self.assertEqual(8, poly.point_count)
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print "\nBEGIN - expecting IllegalArgumentException; safe to ignore.\n"
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try:
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c = poly.centroid
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except OGRException:
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# Should raise an OGR exception, rings are not closed
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pass
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else:
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self.fail('Should have raised an OGRException!')
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print "\nEND - expecting IllegalArgumentException; safe to ignore.\n"
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# Closing the rings -- doesn't work on GDAL versions 1.4.1 and below:
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# http://trac.osgeo.org/gdal/ticket/1673
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major, minor1, minor2 = gdal_version().split('.')
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if major == '1':
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iminor1 = int(minor1)
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if iminor1 < 4 or (iminor1 == 4 and minor2.startswith('1')): return
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poly.close_rings()
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self.assertEqual(10, poly.point_count) # Two closing points should've been added
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self.assertEqual(OGRGeometry('POINT(2.5 2.5)'), poly.centroid)
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def test08_multipolygons(self):
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"Testing MultiPolygon objects."
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prev = OGRGeometry('POINT(0 0)')
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for mp in multipolygons:
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mpoly = OGRGeometry(mp.wkt)
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self.assertEqual(6, mpoly.geom_type)
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self.assertEqual('MULTIPOLYGON', mpoly.geom_name)
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if mp.valid:
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self.assertEqual(mp.n_p, mpoly.point_count)
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self.assertEqual(mp.num_geom, len(mpoly))
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self.assertRaises(OGRIndexError, mpoly.__getitem__, len(mpoly))
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for p in mpoly:
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self.assertEqual('POLYGON', p.geom_name)
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self.assertEqual(3, p.geom_type)
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self.assertEqual(mpoly.wkt, OGRGeometry(mp.wkt).wkt)
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def test09a_srs(self):
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"Testing OGR Geometries with Spatial Reference objects."
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for mp in multipolygons:
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# Creating a geometry w/spatial reference
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sr = SpatialReference('WGS84')
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mpoly = OGRGeometry(mp.wkt, sr)
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self.assertEqual(sr.wkt, mpoly.srs.wkt)
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# Ensuring that SRS is propagated to clones.
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klone = mpoly.clone()
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self.assertEqual(sr.wkt, klone.srs.wkt)
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# Ensuring all children geometries (polygons and their rings) all
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# return the assigned spatial reference as well.
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for poly in mpoly:
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self.assertEqual(sr.wkt, poly.srs.wkt)
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for ring in poly:
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self.assertEqual(sr.wkt, ring.srs.wkt)
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# Ensuring SRS propagate in topological ops.
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a, b = topology_geoms[0]
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a, b = OGRGeometry(a.wkt, sr), OGRGeometry(b.wkt, sr)
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diff = a.difference(b)
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union = a.union(b)
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self.assertEqual(sr.wkt, diff.srs.wkt)
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self.assertEqual(sr.srid, union.srs.srid)
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# Instantiating w/an integer SRID
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mpoly = OGRGeometry(mp.wkt, 4326)
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self.assertEqual(4326, mpoly.srid)
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mpoly.srs = SpatialReference(4269)
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self.assertEqual(4269, mpoly.srid)
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self.assertEqual('NAD83', mpoly.srs.name)
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# Incrementing through the multipolyogn after the spatial reference
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# has been re-assigned.
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for poly in mpoly:
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self.assertEqual(mpoly.srs.wkt, poly.srs.wkt)
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poly.srs = 32140
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for ring in poly:
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# Changing each ring in the polygon
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self.assertEqual(32140, ring.srs.srid)
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self.assertEqual('NAD83 / Texas South Central', ring.srs.name)
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ring.srs = str(SpatialReference(4326)) # back to WGS84
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self.assertEqual(4326, ring.srs.srid)
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# Using the `srid` property.
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ring.srid = 4322
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self.assertEqual('WGS 72', ring.srs.name)
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self.assertEqual(4322, ring.srid)
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def test09b_srs_transform(self):
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"Testing transform()."
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orig = OGRGeometry('POINT (-104.609 38.255)', 4326)
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trans = OGRGeometry('POINT (992385.4472045 481455.4944650)', 2774)
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# Using an srid, a SpatialReference object, and a CoordTransform object
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# or transformations.
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t1, t2, t3 = orig.clone(), orig.clone(), orig.clone()
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t1.transform(trans.srid)
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t2.transform(SpatialReference('EPSG:2774'))
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ct = CoordTransform(SpatialReference('WGS84'), SpatialReference(2774))
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t3.transform(ct)
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# Testing use of the `clone` keyword.
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k1 = orig.clone()
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k2 = k1.transform(trans.srid, clone=True)
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self.assertEqual(k1, orig)
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self.assertNotEqual(k1, k2)
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prec = 3
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for p in (t1, t2, t3, k2):
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self.assertAlmostEqual(trans.x, p.x, prec)
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self.assertAlmostEqual(trans.y, p.y, prec)
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def test09c_transform_dim(self):
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"Testing coordinate dimension is the same on transformed geometries."
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ls_orig = OGRGeometry('LINESTRING(-104.609 38.255)', 4326)
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ls_trans = OGRGeometry('LINESTRING(992385.4472045 481455.4944650)', 2774)
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prec = 3
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ls_orig.transform(ls_trans.srs)
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# Making sure the coordinate dimension is still 2D.
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self.assertEqual(2, ls_orig.coord_dim)
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self.assertAlmostEqual(ls_trans.x[0], ls_orig.x[0], prec)
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self.assertAlmostEqual(ls_trans.y[0], ls_orig.y[0], prec)
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def test10_difference(self):
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"Testing difference()."
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for i in xrange(len(topology_geoms)):
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g_tup = topology_geoms[i]
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a = OGRGeometry(g_tup[0].wkt)
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b = OGRGeometry(g_tup[1].wkt)
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d1 = OGRGeometry(diff_geoms[i].wkt)
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d2 = a.difference(b)
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self.assertEqual(d1, d2)
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self.assertEqual(d1, a - b) # __sub__ is difference operator
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a -= b # testing __isub__
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self.assertEqual(d1, a)
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def test11_intersection(self):
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"Testing intersects() and intersection()."
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for i in xrange(len(topology_geoms)):
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g_tup = topology_geoms[i]
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a = OGRGeometry(g_tup[0].wkt)
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b = OGRGeometry(g_tup[1].wkt)
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i1 = OGRGeometry(intersect_geoms[i].wkt)
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self.assertEqual(True, a.intersects(b))
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i2 = a.intersection(b)
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self.assertEqual(i1, i2)
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self.assertEqual(i1, a & b) # __and__ is intersection operator
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a &= b # testing __iand__
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self.assertEqual(i1, a)
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def test12_symdifference(self):
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"Testing sym_difference()."
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for i in xrange(len(topology_geoms)):
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g_tup = topology_geoms[i]
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a = OGRGeometry(g_tup[0].wkt)
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b = OGRGeometry(g_tup[1].wkt)
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d1 = OGRGeometry(sdiff_geoms[i].wkt)
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d2 = a.sym_difference(b)
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self.assertEqual(d1, d2)
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self.assertEqual(d1, a ^ b) # __xor__ is symmetric difference operator
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a ^= b # testing __ixor__
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self.assertEqual(d1, a)
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def test13_union(self):
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"Testing union()."
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for i in xrange(len(topology_geoms)):
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g_tup = topology_geoms[i]
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a = OGRGeometry(g_tup[0].wkt)
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b = OGRGeometry(g_tup[1].wkt)
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u1 = OGRGeometry(union_geoms[i].wkt)
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u2 = a.union(b)
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self.assertEqual(u1, u2)
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self.assertEqual(u1, a | b) # __or__ is union operator
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a |= b # testing __ior__
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self.assertEqual(u1, a)
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def test14_add(self):
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"Testing GeometryCollection.add()."
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# Can't insert a Point into a MultiPolygon.
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mp = OGRGeometry('MultiPolygon')
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pnt = OGRGeometry('POINT(5 23)')
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self.assertRaises(OGRException, mp.add, pnt)
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# GeometryCollection.add may take an OGRGeometry (if another collection
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# of the same type all child geoms will be added individually) or WKT.
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for mp in multipolygons:
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mpoly = OGRGeometry(mp.wkt)
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mp1 = OGRGeometry('MultiPolygon')
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mp2 = OGRGeometry('MultiPolygon')
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mp3 = OGRGeometry('MultiPolygon')
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for poly in mpoly:
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mp1.add(poly) # Adding a geometry at a time
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mp2.add(poly.wkt) # Adding WKT
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mp3.add(mpoly) # Adding a MultiPolygon's entire contents at once.
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for tmp in (mp1, mp2, mp3): self.assertEqual(mpoly, tmp)
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def test15_extent(self):
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"Testing `extent` property."
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# The xmin, ymin, xmax, ymax of the MultiPoint should be returned.
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mp = OGRGeometry('MULTIPOINT(5 23, 0 0, 10 50)')
|
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self.assertEqual((0.0, 0.0, 10.0, 50.0), mp.extent)
|
|
# Testing on the 'real world' Polygon.
|
|
poly = OGRGeometry(polygons[3].wkt)
|
|
ring = poly.shell
|
|
x, y = ring.x, ring.y
|
|
xmin, ymin = min(x), min(y)
|
|
xmax, ymax = max(x), max(y)
|
|
self.assertEqual((xmin, ymin, xmax, ymax), poly.extent)
|
|
|
|
def test16_25D(self):
|
|
"Testing 2.5D geometries."
|
|
pnt_25d = OGRGeometry('POINT(1 2 3)')
|
|
self.assertEqual('Point25D', pnt_25d.geom_type.name)
|
|
self.assertEqual(3.0, pnt_25d.z)
|
|
self.assertEqual(3, pnt_25d.coord_dim)
|
|
ls_25d = OGRGeometry('LINESTRING(1 1 1,2 2 2,3 3 3)')
|
|
self.assertEqual('LineString25D', ls_25d.geom_type.name)
|
|
self.assertEqual([1.0, 2.0, 3.0], ls_25d.z)
|
|
self.assertEqual(3, ls_25d.coord_dim)
|
|
|
|
def test17_pickle(self):
|
|
"Testing pickle support."
|
|
import cPickle
|
|
g1 = OGRGeometry('LINESTRING(1 1 1,2 2 2,3 3 3)', 'WGS84')
|
|
g2 = cPickle.loads(cPickle.dumps(g1))
|
|
self.assertEqual(g1, g2)
|
|
self.assertEqual(4326, g2.srs.srid)
|
|
self.assertEqual(g1.srs.wkt, g2.srs.wkt)
|
|
|
|
def test18_ogrgeometry_transform_workaround(self):
|
|
"Testing coordinate dimensions on geometries after transformation."
|
|
# A bug in GDAL versions prior to 1.7 changes the coordinate
|
|
# dimension of a geometry after it has been transformed.
|
|
# This test ensures that the bug workarounds employed within
|
|
# `OGRGeometry.transform` indeed work.
|
|
wkt_2d = "MULTILINESTRING ((0 0,1 1,2 2))"
|
|
wkt_3d = "MULTILINESTRING ((0 0 0,1 1 1,2 2 2))"
|
|
srid = 4326
|
|
|
|
# For both the 2D and 3D MultiLineString, ensure _both_ the dimension
|
|
# of the collection and the component LineString have the expected
|
|
# coordinate dimension after transform.
|
|
geom = OGRGeometry(wkt_2d, srid)
|
|
geom.transform(srid)
|
|
self.assertEqual(2, geom.coord_dim)
|
|
self.assertEqual(2, geom[0].coord_dim)
|
|
self.assertEqual(wkt_2d, geom.wkt)
|
|
|
|
geom = OGRGeometry(wkt_3d, srid)
|
|
geom.transform(srid)
|
|
self.assertEqual(3, geom.coord_dim)
|
|
self.assertEqual(3, geom[0].coord_dim)
|
|
self.assertEqual(wkt_3d, geom.wkt)
|
|
|
|
def test19_equivalence_regression(self):
|
|
"Testing equivalence methods with non-OGRGeometry instances."
|
|
self.assertNotEqual(None, OGRGeometry('POINT(0 0)'))
|
|
self.assertEqual(False, OGRGeometry('LINESTRING(0 0, 1 1)') == 3)
|
|
|
|
def suite():
|
|
s = unittest.TestSuite()
|
|
s.addTest(unittest.makeSuite(OGRGeomTest))
|
|
return s
|
|
|
|
def run(verbosity=2):
|
|
unittest.TextTestRunner(verbosity=verbosity).run(suite())
|