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 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.failUnless(OGRGeomType(wkb25bit + 1) == 'Point25D')
self.failUnless(OGRGeomType('MultiLineString25D') == (5 + wkb25bit))
self.assertEqual('GeometryCollectionField', OGRGeomType('GeometryCollection25D').django)
def test01a_wkt(self):
"Testing WKT output."
for g in 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 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)
if not hasattr(g, 'not_equal'):
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."
# 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 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 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(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 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())
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