/django/contrib/gis/tests/test_spatialrefsys.py
https://code.google.com/p/mango-py/ · Python · 115 lines · 89 code · 16 blank · 10 comment · 21 complexity · 77ff8bf38938ca9045dac55ea6562767 MD5 · raw file
- from django.db import connection
- from django.contrib.gis.gdal import GDAL_VERSION
- from django.contrib.gis.tests.utils import mysql, no_mysql, oracle, postgis, spatialite
- from django.utils import unittest
- 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 oracle:
- from django.contrib.gis.db.backends.oracle.models import SpatialRefSys
- elif postgis:
- from django.contrib.gis.db.backends.postgis.models import SpatialRefSys
- elif spatialite:
- from django.contrib.gis.db.backends.spatialite.models import SpatialRefSys
- 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 connection.ops.spatial_version >= (1, 4, 0):
- 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
- if GDAL_VERSION <= (1, 8):
- self.assertEqual(sd['proj4'], srs.proj4)
- # No `srtext` field in the `spatial_ref_sys` table in SpatiaLite
- if not spatialite:
- if connection.ops.spatial_version >= (1, 4, 0):
- 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())