EVOLUTION-MANAGER

Edit File: test_geom.py

import json from binascii import b2a_hex try: from django.utils.six.moves import cPickle as pickle except ImportError: import pickle from django.contrib.gis.gdal import HAS_GDAL from django.contrib.gis.geometry.test_data import TestDataMixin from django.utils.six.moves import xrange from django.utils import unittest from django.utils.unittest import skipUnless if HAS_GDAL: from django.contrib.gis.gdal import (OGRGeometry, OGRGeomType, OGRException, OGRIndexError, SpatialReference, CoordTransform, GDAL_VERSION) @skipUnless(HAS_GDAL, "GDAL is required") class OGRGeomTest(unittest.TestCase, TestDataMixin): "This tests the OGR Geometry." def test00a_geomtype(self): "Testing OGRGeomType object." # OGRGeomType should initialize on all these inputs. try: g = OGRGeomType(1) g = OGRGeomType(7) g = OGRGeomType('point') g = OGRGeomType('GeometrycollectioN') g = OGRGeomType('LINearrING') g = OGRGeomType('Unknown') except: self.fail('Could not create an OGRGeomType object!') # Should throw TypeError on this input self.assertRaises(OGRException, OGRGeomType, 23) self.assertRaises(OGRException, OGRGeomType, 'fooD') self.assertRaises(OGRException, OGRGeomType, 9) # Equivalence can take strings, ints, and other OGRGeomTypes self.assertEqual(True, OGRGeomType(1) == OGRGeomType(1)) self.assertEqual(True, OGRGeomType(7) == 'GeometryCollection') self.assertEqual(True, OGRGeomType('point') == 'POINT') self.assertEqual(False, OGRGeomType('point') == 2) self.assertEqual(True, OGRGeomType('unknown') == 0) self.assertEqual(True, OGRGeomType(6) == 'MULtiPolyGON') self.assertEqual(False, OGRGeomType(1) != OGRGeomType('point')) self.assertEqual(True, OGRGeomType('POINT') != OGRGeomType(6)) # Testing the Django field name equivalent property. self.assertEqual('PointField', OGRGeomType('Point').django) self.assertEqual('GeometryField', OGRGeomType('Unknown').django) self.assertEqual(None, OGRGeomType('none').django) # 'Geometry' initialization implies an unknown geometry type. gt = OGRGeomType('Geometry') self.assertEqual(0, gt.num) self.assertEqual('Unknown', gt.name) def test00b_geomtype_25d(self): "Testing OGRGeomType object with 25D types." wkb25bit = OGRGeomType.wkb25bit self.assertTrue(OGRGeomType(wkb25bit + 1) == 'Point25D') self.assertTrue(OGRGeomType('MultiLineString25D') == (5 + wkb25bit)) self.assertEqual('GeometryCollectionField', OGRGeomType('GeometryCollection25D').django) def test01a_wkt(self): "Testing WKT output." for g in self.geometries.wkt_out: geom = OGRGeometry(g.wkt) self.assertEqual(g.wkt, geom.wkt) def test01a_ewkt(self): "Testing EWKT input/output." for ewkt_val in ('POINT (1 2 3)', 'LINEARRING (0 0,1 1,2 1,0 0)'): # First with ewkt output when no SRID in EWKT self.assertEqual(ewkt_val, OGRGeometry(ewkt_val).ewkt) # No test consumption with an SRID specified. ewkt_val = 'SRID=4326;%s' % ewkt_val geom = OGRGeometry(ewkt_val) self.assertEqual(ewkt_val, geom.ewkt) self.assertEqual(4326, geom.srs.srid) def test01b_gml(self): "Testing GML output." for g in self.geometries.wkt_out: geom = OGRGeometry(g.wkt) exp_gml = g.gml if GDAL_VERSION >= (1, 8): # In GDAL 1.8, the non-conformant GML tag <gml:GeometryCollection> was # replaced with <gml:MultiGeometry>. exp_gml = exp_gml.replace('GeometryCollection', 'MultiGeometry') self.assertEqual(exp_gml, geom.gml) def test01c_hex(self): "Testing HEX input/output." for g in self.geometries.hex_wkt: geom1 = OGRGeometry(g.wkt) self.assertEqual(g.hex.encode(), geom1.hex) # Constructing w/HEX geom2 = OGRGeometry(g.hex) self.assertEqual(geom1, geom2) def test01d_wkb(self): "Testing WKB input/output." for g in self.geometries.hex_wkt: geom1 = OGRGeometry(g.wkt) wkb = geom1.wkb self.assertEqual(b2a_hex(wkb).upper(), g.hex.encode()) # Constructing w/WKB. geom2 = OGRGeometry(wkb) self.assertEqual(geom1, geom2) def test01e_json(self): "Testing GeoJSON input/output." for g in self.geometries.json_geoms: geom = OGRGeometry(g.wkt) if not hasattr(g, 'not_equal'): # Loading jsons to prevent decimal differences self.assertEqual(json.loads(g.json), json.loads(geom.json)) self.assertEqual(json.loads(g.json), json.loads(geom.geojson)) self.assertEqual(OGRGeometry(g.wkt), OGRGeometry(geom.json)) def test02_points(self): "Testing Point objects." prev = OGRGeometry('POINT(0 0)') for p in self.geometries.points: if not hasattr(p, 'z'): # No 3D pnt = OGRGeometry(p.wkt) self.assertEqual(1, pnt.geom_type) self.assertEqual('POINT', pnt.geom_name) self.assertEqual(p.x, pnt.x) self.assertEqual(p.y, pnt.y) self.assertEqual((p.x, p.y), pnt.tuple) def test03_multipoints(self): "Testing MultiPoint objects." for mp in self.geometries.multipoints: mgeom1 = OGRGeometry(mp.wkt) # First one from WKT self.assertEqual(4, mgeom1.geom_type) self.assertEqual('MULTIPOINT', mgeom1.geom_name) mgeom2 = OGRGeometry('MULTIPOINT') # Creating empty multipoint mgeom3 = OGRGeometry('MULTIPOINT') for g in mgeom1: mgeom2.add(g) # adding each point from the multipoints mgeom3.add(g.wkt) # should take WKT as well self.assertEqual(mgeom1, mgeom2) # they should equal self.assertEqual(mgeom1, mgeom3) self.assertEqual(mp.coords, mgeom2.coords) self.assertEqual(mp.n_p, mgeom2.point_count) def test04_linestring(self): "Testing LineString objects." prev = OGRGeometry('POINT(0 0)') for ls in self.geometries.linestrings: linestr = OGRGeometry(ls.wkt) self.assertEqual(2, linestr.geom_type) self.assertEqual('LINESTRING', linestr.geom_name) self.assertEqual(ls.n_p, linestr.point_count) self.assertEqual(ls.coords, linestr.tuple) self.assertEqual(True, linestr == OGRGeometry(ls.wkt)) self.assertEqual(True, linestr != prev) self.assertRaises(OGRIndexError, linestr.__getitem__, len(linestr)) prev = linestr # Testing the x, y properties. x = [tmpx for tmpx, tmpy in ls.coords] y = [tmpy for tmpx, tmpy in ls.coords] self.assertEqual(x, linestr.x) self.assertEqual(y, linestr.y) def test05_multilinestring(self): "Testing MultiLineString objects." prev = OGRGeometry('POINT(0 0)') for mls in self.geometries.multilinestrings: mlinestr = OGRGeometry(mls.wkt) self.assertEqual(5, mlinestr.geom_type) self.assertEqual('MULTILINESTRING', mlinestr.geom_name) self.assertEqual(mls.n_p, mlinestr.point_count) self.assertEqual(mls.coords, mlinestr.tuple) self.assertEqual(True, mlinestr == OGRGeometry(mls.wkt)) self.assertEqual(True, mlinestr != prev) prev = mlinestr for ls in mlinestr: self.assertEqual(2, ls.geom_type) self.assertEqual('LINESTRING', ls.geom_name) self.assertRaises(OGRIndexError, mlinestr.__getitem__, len(mlinestr)) def test06_linearring(self): "Testing LinearRing objects." prev = OGRGeometry('POINT(0 0)') for rr in self.geometries.linearrings: lr = OGRGeometry(rr.wkt) #self.assertEqual(101, lr.geom_type.num) self.assertEqual('LINEARRING', lr.geom_name) self.assertEqual(rr.n_p, len(lr)) self.assertEqual(True, lr == OGRGeometry(rr.wkt)) self.assertEqual(True, lr != prev) prev = lr def test07a_polygons(self): "Testing Polygon objects." # Testing `from_bbox` class method bbox = (-180,-90,180,90) p = OGRGeometry.from_bbox( bbox ) self.assertEqual(bbox, p.extent) prev = OGRGeometry('POINT(0 0)') for p in self.geometries.polygons: poly = OGRGeometry(p.wkt) self.assertEqual(3, poly.geom_type) self.assertEqual('POLYGON', poly.geom_name) self.assertEqual(p.n_p, poly.point_count) self.assertEqual(p.n_i + 1, len(poly)) # Testing area & centroid. self.assertAlmostEqual(p.area, poly.area, 9) x, y = poly.centroid.tuple self.assertAlmostEqual(p.centroid[0], x, 9) self.assertAlmostEqual(p.centroid[1], y, 9) # Testing equivalence self.assertEqual(True, poly == OGRGeometry(p.wkt)) self.assertEqual(True, poly != prev) if p.ext_ring_cs: ring = poly[0] self.assertEqual(p.ext_ring_cs, ring.tuple) self.assertEqual(p.ext_ring_cs, poly[0].tuple) self.assertEqual(len(p.ext_ring_cs), ring.point_count) for r in poly: self.assertEqual('LINEARRING', r.geom_name) def test07b_closepolygons(self): "Testing closing Polygon objects." # Both rings in this geometry are not closed. poly = OGRGeometry('POLYGON((0 0, 5 0, 5 5, 0 5), (1 1, 2 1, 2 2, 2 1))') self.assertEqual(8, poly.point_count) with self.assertRaises(OGRException): _ = poly.centroid poly.close_rings() self.assertEqual(10, poly.point_count) # Two closing points should've been added self.assertEqual(OGRGeometry('POINT(2.5 2.5)'), poly.centroid) def test08_multipolygons(self): "Testing MultiPolygon objects." prev = OGRGeometry('POINT(0 0)') for mp in self.geometries.multipolygons: mpoly = OGRGeometry(mp.wkt) self.assertEqual(6, mpoly.geom_type) self.assertEqual('MULTIPOLYGON', mpoly.geom_name) if mp.valid: self.assertEqual(mp.n_p, mpoly.point_count) self.assertEqual(mp.num_geom, len(mpoly)) self.assertRaises(OGRIndexError, mpoly.__getitem__, len(mpoly)) for p in mpoly: self.assertEqual('POLYGON', p.geom_name) self.assertEqual(3, p.geom_type) self.assertEqual(mpoly.wkt, OGRGeometry(mp.wkt).wkt) def test09a_srs(self): "Testing OGR Geometries with Spatial Reference objects." for mp in self.geometries.multipolygons: # Creating a geometry w/spatial reference sr = SpatialReference('WGS84') mpoly = OGRGeometry(mp.wkt, sr) self.assertEqual(sr.wkt, mpoly.srs.wkt) # Ensuring that SRS is propagated to clones. klone = mpoly.clone() self.assertEqual(sr.wkt, klone.srs.wkt) # Ensuring all children geometries (polygons and their rings) all # return the assigned spatial reference as well. for poly in mpoly: self.assertEqual(sr.wkt, poly.srs.wkt) for ring in poly: self.assertEqual(sr.wkt, ring.srs.wkt) # Ensuring SRS propagate in topological ops. a = OGRGeometry(self.geometries.topology_geoms[0].wkt_a, sr) b = OGRGeometry(self.geometries.topology_geoms[0].wkt_b, sr) diff = a.difference(b) union = a.union(b) self.assertEqual(sr.wkt, diff.srs.wkt) self.assertEqual(sr.srid, union.srs.srid) # Instantiating w/an integer SRID mpoly = OGRGeometry(mp.wkt, 4326) self.assertEqual(4326, mpoly.srid) mpoly.srs = SpatialReference(4269) self.assertEqual(4269, mpoly.srid) self.assertEqual('NAD83', mpoly.srs.name) # Incrementing through the multipolyogn after the spatial reference # has been re-assigned. for poly in mpoly: self.assertEqual(mpoly.srs.wkt, poly.srs.wkt) poly.srs = 32140 for ring in poly: # Changing each ring in the polygon self.assertEqual(32140, ring.srs.srid) self.assertEqual('NAD83 / Texas South Central', ring.srs.name) ring.srs = str(SpatialReference(4326)) # back to WGS84 self.assertEqual(4326, ring.srs.srid) # Using the `srid` property. ring.srid = 4322 self.assertEqual('WGS 72', ring.srs.name) self.assertEqual(4322, ring.srid) def test09b_srs_transform(self): "Testing transform()." orig = OGRGeometry('POINT (-104.609 38.255)', 4326) trans = OGRGeometry('POINT (992385.4472045 481455.4944650)', 2774) # Using an srid, a SpatialReference object, and a CoordTransform object # or transformations. t1, t2, t3 = orig.clone(), orig.clone(), orig.clone() t1.transform(trans.srid) t2.transform(SpatialReference('EPSG:2774')) ct = CoordTransform(SpatialReference('WGS84'), SpatialReference(2774)) t3.transform(ct) # Testing use of the `clone` keyword. k1 = orig.clone() k2 = k1.transform(trans.srid, clone=True) self.assertEqual(k1, orig) self.assertNotEqual(k1, k2) prec = 3 for p in (t1, t2, t3, k2): self.assertAlmostEqual(trans.x, p.x, prec) self.assertAlmostEqual(trans.y, p.y, prec) def test09c_transform_dim(self): "Testing coordinate dimension is the same on transformed geometries." ls_orig = OGRGeometry('LINESTRING(-104.609 38.255)', 4326) ls_trans = OGRGeometry('LINESTRING(992385.4472045 481455.4944650)', 2774) prec = 3 ls_orig.transform(ls_trans.srs) # Making sure the coordinate dimension is still 2D. self.assertEqual(2, ls_orig.coord_dim) self.assertAlmostEqual(ls_trans.x[0], ls_orig.x[0], prec) self.assertAlmostEqual(ls_trans.y[0], ls_orig.y[0], prec) def test10_difference(self): "Testing difference()." for i in xrange(len(self.geometries.topology_geoms)): a = OGRGeometry(self.geometries.topology_geoms[i].wkt_a) b = OGRGeometry(self.geometries.topology_geoms[i].wkt_b) d1 = OGRGeometry(self.geometries.diff_geoms[i].wkt) d2 = a.difference(b) self.assertEqual(d1, d2) self.assertEqual(d1, a - b) # __sub__ is difference operator a -= b # testing __isub__ self.assertEqual(d1, a) def test11_intersection(self): "Testing intersects() and intersection()." for i in xrange(len(self.geometries.topology_geoms)): a = OGRGeometry(self.geometries.topology_geoms[i].wkt_a) b = OGRGeometry(self.geometries.topology_geoms[i].wkt_b) i1 = OGRGeometry(self.geometries.intersect_geoms[i].wkt) self.assertEqual(True, a.intersects(b)) i2 = a.intersection(b) self.assertEqual(i1, i2) self.assertEqual(i1, a & b) # __and__ is intersection operator a &= b # testing __iand__ self.assertEqual(i1, a) def test12_symdifference(self): "Testing sym_difference()." for i in xrange(len(self.geometries.topology_geoms)): a = OGRGeometry(self.geometries.topology_geoms[i].wkt_a) b = OGRGeometry(self.geometries.topology_geoms[i].wkt_b) d1 = OGRGeometry(self.geometries.sdiff_geoms[i].wkt) d2 = a.sym_difference(b) self.assertEqual(d1, d2) self.assertEqual(d1, a ^ b) # __xor__ is symmetric difference operator a ^= b # testing __ixor__ self.assertEqual(d1, a) def test13_union(self): "Testing union()." for i in xrange(len(self.geometries.topology_geoms)): a = OGRGeometry(self.geometries.topology_geoms[i].wkt_a) b = OGRGeometry(self.geometries.topology_geoms[i].wkt_b) u1 = OGRGeometry(self.geometries.union_geoms[i].wkt) u2 = a.union(b) self.assertEqual(u1, u2) self.assertEqual(u1, a | b) # __or__ is union operator a |= b # testing __ior__ self.assertEqual(u1, a) def test14_add(self): "Testing GeometryCollection.add()." # Can't insert a Point into a MultiPolygon. mp = OGRGeometry('MultiPolygon') pnt = OGRGeometry('POINT(5 23)') self.assertRaises(OGRException, mp.add, pnt) # GeometryCollection.add may take an OGRGeometry (if another collection # of the same type all child geoms will be added individually) or WKT. for mp in self.geometries.multipolygons: mpoly = OGRGeometry(mp.wkt) mp1 = OGRGeometry('MultiPolygon') mp2 = OGRGeometry('MultiPolygon') mp3 = OGRGeometry('MultiPolygon') for poly in mpoly: mp1.add(poly) # Adding a geometry at a time mp2.add(poly.wkt) # Adding WKT mp3.add(mpoly) # Adding a MultiPolygon's entire contents at once. for tmp in (mp1, mp2, mp3): self.assertEqual(mpoly, tmp) def test15_extent(self): "Testing `extent` property." # The xmin, ymin, xmax, ymax of the MultiPoint should be returned. mp = OGRGeometry('MULTIPOINT(5 23, 0 0, 10 50)') self.assertEqual((0.0, 0.0, 10.0, 50.0), mp.extent) # Testing on the 'real world' Polygon. poly = OGRGeometry(self.geometries.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." g1 = OGRGeometry('LINESTRING(1 1 1,2 2 2,3 3 3)', 'WGS84') g2 = pickle.loads(pickle.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)