import unittest from django.contrib.gis.gdal import OGRGeometry, OGRGeomType, \ OGRException, OGRIndexError, SpatialReference, CoordTransform, \ gdal_version from django.contrib.gis.tests.geometries import * class OGRGeomTest(unittest.TestCase): "This tests the OGR Geometry." def test00_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(TypeError, OGRGeomType.__init__, 23) self.assertRaises(TypeError, OGRGeomType.__init__, 'fooD') self.assertRaises(TypeError, OGRGeomType.__init__, 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(None, OGRGeomType('Unknown').django) self.assertEqual(None, OGRGeomType('none').django) def test01a_wkt(self): "Testing WKT output." for g in wkt_out: geom = OGRGeometry(g.wkt) self.assertEqual(g.wkt, geom.wkt) def test01b_gml(self): "Testing GML output." for g in wkt_out: geom = OGRGeometry(g.wkt) self.assertEqual(g.gml, geom.gml) def test01c_hex(self): "Testing HEX input/output." for g in hex_wkt: geom1 = OGRGeometry(g.wkt) self.assertEqual(g.hex, geom1.hex) # Constructing w/HEX geom2 = OGRGeometry(g.hex) self.assertEqual(geom1, geom2) def test01d_wkb(self): "Testing WKB input/output." from binascii import b2a_hex for g in hex_wkt: geom1 = OGRGeometry(g.wkt) wkb = geom1.wkb self.assertEqual(b2a_hex(wkb).upper(), g.hex) # Constructing w/WKB. geom2 = OGRGeometry(wkb) self.assertEqual(geom1, geom2) def test01e_json(self): "Testing GeoJSON input/output." from django.contrib.gis.gdal.prototypes.geom import GEOJSON if not GEOJSON: return for g in json_geoms: geom = OGRGeometry(g.wkt) self.assertEqual(g.json, geom.json) self.assertEqual(g.json, 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 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 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.points, mgeom2.tuple) self.assertEqual(mp.n_p, mgeom2.point_count) def test04_linestring(self): "Testing LineString objects." prev = OGRGeometry('POINT(0 0)') for ls in 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.tup, 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.tup] y = [tmpy for tmpx, tmpy in ls.tup] 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 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.tup, 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 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." prev = OGRGeometry('POINT(0 0)') for p in 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) print "\nBEGIN - expecting IllegalArgumentException; safe to ignore.\n" try: c = poly.centroid except OGRException: # Should raise an OGR exception, rings are not closed pass else: self.fail('Should have raised an OGRException!') print "\nEND - expecting IllegalArgumentException; safe to ignore.\n" # Closing the rings -- doesn't work on GDAL versions 1.4.1 and below: # http://trac.osgeo.org/gdal/ticket/1673 major, minor1, minor2 = gdal_version().split('.') if major == '1': iminor1 = int(minor1) if iminor1 < 4 or (iminor1 == 4 and minor2.startswith('1')): return 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 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 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, b = topology_geoms[0] a, b = OGRGeometry(a.wkt, sr), OGRGeometry(b.wkt, 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 test10_difference(self): "Testing difference()." for i in xrange(len(topology_geoms)): g_tup = topology_geoms[i] a = OGRGeometry(g_tup[0].wkt) b = OGRGeometry(g_tup[1].wkt) d1 = OGRGeometry(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(topology_geoms)): g_tup = topology_geoms[i] a = OGRGeometry(g_tup[0].wkt) b = OGRGeometry(g_tup[1].wkt) i1 = OGRGeometry(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(topology_geoms)): g_tup = topology_geoms[i] a = OGRGeometry(g_tup[0].wkt) b = OGRGeometry(g_tup[1].wkt) d1 = OGRGeometry(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(topology_geoms)): g_tup = topology_geoms[i] a = OGRGeometry(g_tup[0].wkt) b = OGRGeometry(g_tup[1].wkt) u1 = OGRGeometry(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 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(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 suite(): s = unittest.TestSuite() s.addTest(unittest.makeSuite(OGRGeomTest)) return s def run(verbosity=2): unittest.TextTestRunner(verbosity=verbosity).run(suite())