import unittest from django.contrib.gis.db.backend import SpatialBackend from django.contrib.gis.tests.utils import mysql, no_mysql, oracle, postgis, spatialite if not mysql: from django.contrib.gis.models import SpatialRefSys test_srs = ({'srid' : 4326, 'auth_name' : ('EPSG', True), 'auth_srid' : 4326, 'srtext' : 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]', 'srtext14' : '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"]]', 'proj4' : '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ', 'spheroid' : 'WGS 84', 'name' : 'WGS 84', 'geographic' : True, 'projected' : False, 'spatialite' : True, 'ellipsoid' : (6378137.0, 6356752.3, 298.257223563), # From proj's "cs2cs -le" and Wikipedia (semi-minor only) 'eprec' : (1, 1, 9), }, {'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",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["standard_parallel_1",30.28333333333333],PARAMETER["standard_parallel_2",28.38333333333333],PARAMETER["latitude_of_origin",27.83333333333333],PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],PARAMETER["false_northing",4000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","32140"]]', 'srtext14': 'PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["standard_parallel_1",30.28333333333333],PARAMETER["standard_parallel_2",28.38333333333333],PARAMETER["latitude_of_origin",27.83333333333333],PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],PARAMETER["false_northing",4000000],AUTHORITY["EPSG","32140"],AXIS["X",EAST],AXIS["Y",NORTH]]', 'proj4' : '+proj=lcc +lat_1=30.28333333333333 +lat_2=28.38333333333333 +lat_0=27.83333333333333 +lon_0=-99 +x_0=600000 +y_0=4000000 +ellps=GRS80 +datum=NAD83 +units=m +no_defs ', 'spheroid' : 'GRS 1980', 'name' : 'NAD83 / Texas South Central', 'geographic' : False, 'projected' : True, 'spatialite' : False, 'ellipsoid' : (6378137.0, 6356752.31414, 298.257222101), # From proj's "cs2cs -le" and Wikipedia (semi-minor only) 'eprec' : (1, 5, 10), }, ) if SpatialBackend.postgis: major, minor1, minor2 = SpatialBackend.version POSTGIS_14 = major >=1 and minor1 >= 4 class SpatialRefSysTest(unittest.TestCase): @no_mysql def test01_retrieve(self): "Testing 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.assertEqual(True, 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: if POSTGIS_14: srtext = sd['srtext14'] else: srtext = sd['srtext'] self.assertEqual(srtext, srs.wkt) self.assertEqual(sd['proj4'], srs.proj4text) @no_mysql def test02_osr(self): "Testing getting OSR objects from SpatialRefSys model objects." for sd in test_srs: sr = SpatialRefSys.objects.get(srid=sd['srid']) self.assertEqual(True, 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.assertEqual(True, sr.name.startswith(sd['name'])) # Testing the SpatialReference object directly. if postgis or spatialite: srs = sr.srs self.assertEqual(sd['proj4'], srs.proj4) # No `srtext` field in the `spatial_ref_sys` table in SpatiaLite if not spatialite: if POSTGIS_14: srtext = sd['srtext14'] else: srtext = sd['srtext'] self.assertEqual(srtext, srs.wkt) @no_mysql def test03_ellipsoid(self): "Testing 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): param1 = ellps1[i] param2 = ellps2[i] self.assertAlmostEqual(ellps1[i], ellps2[i], prec[i]) def suite(): s = unittest.TestSuite() s.addTest(unittest.makeSuite(SpatialRefSysTest)) return s def run(verbosity=2): unittest.TextTestRunner(verbosity=verbosity).run(suite())