105 lines
4.8 KiB
Python
105 lines
4.8 KiB
Python
from django.db import connection
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from django.contrib.gis.gdal import HAS_GDAL
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from django.contrib.gis.tests.utils import (no_mysql, oracle, postgis,
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spatialite, HAS_SPATIALREFSYS, SpatialRefSys)
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from django.utils import unittest
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test_srs = ({'srid' : 4326,
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'auth_name' : ('EPSG', True),
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'auth_srid' : 4326,
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# Only the beginning, because there are differences depending on installed libs
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'srtext' : 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84"',
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'proj4' : ['+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ',
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# +ellps=WGS84 has been removed in the 4326 proj string in proj-4.8
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'+proj=longlat +datum=WGS84 +no_defs '],
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'spheroid' : 'WGS 84', 'name' : 'WGS 84',
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'geographic' : True, 'projected' : False, 'spatialite' : True,
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'ellipsoid' : (6378137.0, 6356752.3, 298.257223563), # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
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'eprec' : (1, 1, 9),
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},
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{'srid' : 32140,
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'auth_name' : ('EPSG', False),
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'auth_srid' : 32140,
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'srtext' : 'PROJCS["NAD83 / Texas South Central",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980"',
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'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 ',
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'+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 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs '],
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'spheroid' : 'GRS 1980', 'name' : 'NAD83 / Texas South Central',
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'geographic' : False, 'projected' : True, 'spatialite' : False,
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'ellipsoid' : (6378137.0, 6356752.31414, 298.257222101), # From proj's "cs2cs -le" and Wikipedia (semi-minor only)
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'eprec' : (1, 5, 10),
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},
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)
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@unittest.skipUnless(HAS_GDAL and HAS_SPATIALREFSYS,
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"SpatialRefSysTest needs gdal support and a spatial database")
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class SpatialRefSysTest(unittest.TestCase):
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@no_mysql
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def test01_retrieve(self):
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"Testing retrieval of SpatialRefSys model objects."
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for sd in test_srs:
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srs = SpatialRefSys.objects.get(srid=sd['srid'])
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self.assertEqual(sd['srid'], srs.srid)
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# Some of the authority names are borked on Oracle, e.g., SRID=32140.
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# also, Oracle Spatial seems to add extraneous info to fields, hence the
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# the testing with the 'startswith' flag.
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auth_name, oracle_flag = sd['auth_name']
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if postgis or (oracle and oracle_flag):
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self.assertEqual(True, srs.auth_name.startswith(auth_name))
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self.assertEqual(sd['auth_srid'], srs.auth_srid)
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# No proj.4 and different srtext on oracle backends :(
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if postgis:
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self.assertTrue(srs.wkt.startswith(sd['srtext']))
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self.assertTrue(srs.proj4text in sd['proj4'])
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@no_mysql
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def test02_osr(self):
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"Testing getting OSR objects from SpatialRefSys model objects."
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for sd in test_srs:
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sr = SpatialRefSys.objects.get(srid=sd['srid'])
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self.assertEqual(True, sr.spheroid.startswith(sd['spheroid']))
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self.assertEqual(sd['geographic'], sr.geographic)
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self.assertEqual(sd['projected'], sr.projected)
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if not (spatialite and not sd['spatialite']):
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# Can't get 'NAD83 / Texas South Central' from PROJ.4 string
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# on SpatiaLite
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self.assertEqual(True, sr.name.startswith(sd['name']))
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# Testing the SpatialReference object directly.
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if postgis or spatialite:
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srs = sr.srs
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self.assertTrue(srs.proj4 in sd['proj4'])
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# No `srtext` field in the `spatial_ref_sys` table in SpatiaLite
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if not spatialite:
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self.assertTrue(srs.wkt.startswith(sd['srtext']))
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@no_mysql
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def test03_ellipsoid(self):
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"Testing the ellipsoid property."
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for sd in test_srs:
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# Getting the ellipsoid and precision parameters.
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ellps1 = sd['ellipsoid']
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prec = sd['eprec']
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# Getting our spatial reference and its ellipsoid
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srs = SpatialRefSys.objects.get(srid=sd['srid'])
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ellps2 = srs.ellipsoid
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for i in range(3):
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param1 = ellps1[i]
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param2 = ellps2[i]
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self.assertAlmostEqual(ellps1[i], ellps2[i], prec[i])
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def suite():
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s = unittest.TestSuite()
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s.addTest(unittest.makeSuite(SpatialRefSysTest))
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return s
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def run(verbosity=2):
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unittest.TextTestRunner(verbosity=verbosity).run(suite())
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