import re from django.test import TestCase, skipUnlessDBFeature from .utils import SpatialRefSys, oracle, postgis, spatialite test_srs = ({ 'srid': 4326, 'auth_name': ('EPSG', True), 'auth_srid': 4326, # Only the beginning, because there are differences depending on installed libs 'srtext': 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84"', # +ellps=WGS84 has been removed in the 4326 proj string in proj-4.8 'proj4_re': r'\+proj=longlat (\+ellps=WGS84 )?(\+datum=WGS84 |\+towgs84=0,0,0,0,0,0,0 )\+no_defs ?', 'spheroid': 'WGS 84', 'name': 'WGS 84', 'geographic': True, 'projected': False, 'spatialite': True, # From proj's "cs2cs -le" and Wikipedia (semi-minor only) 'ellipsoid': (6378137.0, 6356752.3, 298.257223563), 'eprec': (1, 1, 9), 'wkt': re.sub(r'[\s+]', '', """ GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.01745329251994328, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4326"]] """) }, { 'srid': 32140, 'auth_name': ('EPSG', False), 'auth_srid': 32140, 'srtext': ( 'PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",' 'DATUM["North_American_Datum_1983",SPHEROID["GRS 1980"' ), 'proj4_re': r'\+proj=lcc (\+lat_1=30.28333333333333? |\+lat_2=28.38333333333333? |\+lat_0=27.83333333333333? |' r'\+lon_0=-99 ){4}\+x_0=600000 \+y_0=4000000 (\+ellps=GRS80 )?' r'(\+datum=NAD83 |\+towgs84=0,0,0,0,0,0,0 )?\+units=m \+no_defs ?', 'spheroid': 'GRS 1980', 'name': 'NAD83 / Texas South Central', 'geographic': False, 'projected': True, 'spatialite': False, # From proj's "cs2cs -le" and Wikipedia (semi-minor only) 'ellipsoid': (6378137.0, 6356752.31414, 298.257222101), 'eprec': (1, 5, 10), }) @skipUnlessDBFeature("has_spatialrefsys_table") class SpatialRefSysTest(TestCase): def test_get_units(self): epsg_4326 = next(f for f in test_srs if f['srid'] == 4326) unit, unit_name = SpatialRefSys().get_units(epsg_4326['wkt']) self.assertEqual(unit_name, 'degree') self.assertAlmostEqual(unit, 0.01745329251994328) def test_retrieve(self): """ Test retrieval of SpatialRefSys model objects. """ for sd in test_srs: srs = SpatialRefSys.objects.get(srid=sd['srid']) self.assertEqual(sd['srid'], srs.srid) # Some of the authority names are borked on Oracle, e.g., SRID=32140. # also, Oracle Spatial seems to add extraneous info to fields, hence the # the testing with the 'startswith' flag. auth_name, oracle_flag = sd['auth_name'] if postgis or (oracle and oracle_flag): self.assertTrue(srs.auth_name.startswith(auth_name)) self.assertEqual(sd['auth_srid'], srs.auth_srid) # No proj.4 and different srtext on oracle backends :( if postgis: self.assertTrue(srs.wkt.startswith(sd['srtext'])) self.assertRegex(srs.proj4text, sd['proj4_re']) def test_osr(self): """ Test getting OSR objects from SpatialRefSys model objects. """ for sd in test_srs: sr = SpatialRefSys.objects.get(srid=sd['srid']) self.assertTrue(sr.spheroid.startswith(sd['spheroid'])) self.assertEqual(sd['geographic'], sr.geographic) self.assertEqual(sd['projected'], sr.projected) if not (spatialite and not sd['spatialite']): # Can't get 'NAD83 / Texas South Central' from PROJ.4 string # on SpatiaLite self.assertTrue(sr.name.startswith(sd['name'])) # Testing the SpatialReference object directly. if postgis or spatialite: srs = sr.srs self.assertRegex(srs.proj4, sd['proj4_re']) self.assertTrue(srs.wkt.startswith(sd['srtext'])) def test_ellipsoid(self): """ Test the ellipsoid property. """ for sd in test_srs: # Getting the ellipsoid and precision parameters. ellps1 = sd['ellipsoid'] prec = sd['eprec'] # Getting our spatial reference and its ellipsoid srs = SpatialRefSys.objects.get(srid=sd['srid']) ellps2 = srs.ellipsoid for i in range(3): self.assertAlmostEqual(ellps1[i], ellps2[i], prec[i]) @skipUnlessDBFeature('supports_add_srs_entry') def test_add_entry(self): """ Test adding a new entry in the SpatialRefSys model using the add_srs_entry utility. """ from django.contrib.gis.utils import add_srs_entry add_srs_entry(3857) self.assertTrue( SpatialRefSys.objects.filter(srid=3857).exists() ) srs = SpatialRefSys.objects.get(srid=3857) self.assertTrue( SpatialRefSys.get_spheroid(srs.wkt).startswith('SPHEROID[') )