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django/tests/gis_tests/gdal_tests/test_srs.py

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from unittest import skipIf
from django.contrib.gis.gdal import (
GDAL_VERSION,
AxisOrder,
CoordTransform,
GDALException,
SpatialReference,
SRSException,
)
from django.contrib.gis.geos import GEOSGeometry
from django.test import SimpleTestCase
class TestSRS:
def __init__(self, wkt, **kwargs):
self.wkt = wkt
for key, value in kwargs.items():
setattr(self, key, value)
# Some Spatial Reference examples
srlist = (
TestSRS(
'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",'
'0.0174532925199433,AUTHORITY["EPSG","9122"]],AXIS["Latitude",NORTH],'
'AXIS["Longitude",EAST],AUTHORITY["EPSG","4326"]]',
epsg=4326,
projected=False,
geographic=True,
local=False,
lin_name="unknown",
ang_name="degree",
lin_units=1.0,
ang_units=0.0174532925199,
auth={
None: ("EPSG", "4326"), # Top-level authority.
"GEOGCS": ("EPSG", "4326"),
"spheroid": ("EPSG", "7030"),
},
attr=(
("DATUM", "WGS_1984"),
(("SPHEROID", 1), "6378137"),
("primem|authority", "EPSG"),
),
),
TestSRS(
'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",0.0174532925199433,AUTHORITY["EPSG","9122"]],'
'AUTHORITY["EPSG","4269"]],PROJECTION["Lambert_Conformal_Conic_2SP"],'
'PARAMETER["standard_parallel_1",30.2833333333333],'
'PARAMETER["standard_parallel_2",28.3833333333333],'
'PARAMETER["latitude_of_origin",27.8333333333333],'
'PARAMETER["central_meridian",-99],PARAMETER["false_easting",600000],'
'PARAMETER["false_northing",4000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],'
'AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","32140"]]',
epsg=32140,
projected=True,
geographic=False,
local=False,
lin_name="metre",
ang_name="degree",
lin_units=1.0,
ang_units=0.0174532925199,
auth={
None: ("EPSG", "32140"), # Top-level authority.
"PROJCS": ("EPSG", "32140"),
"spheroid": ("EPSG", "7019"),
"unit": ("EPSG", "9001"),
},
attr=(
("DATUM", "North_American_Datum_1983"),
(("SPHEROID", 2), "298.257222101"),
("PROJECTION", "Lambert_Conformal_Conic_2SP"),
),
),
TestSRS(
'PROJCS["NAD83 / Texas South Central (ftUS)",'
'GEOGCS["NAD83",DATUM["North_American_Datum_1983",'
'SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],'
'AUTHORITY["EPSG","6269"]],'
'PRIMEM["Greenwich",0],'
'UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic_2SP"],'
'PARAMETER["false_easting",1968500],'
'PARAMETER["false_northing",13123333.3333333],'
'PARAMETER["central_meridian",-99],'
'PARAMETER["standard_parallel_1",28.3833333333333],'
'PARAMETER["standard_parallel_2",30.2833333333333],'
'PARAMETER["latitude_of_origin",27.8333333333333],'
'UNIT["US survey foot",0.304800609601219],AXIS["Easting",EAST],'
'AXIS["Northing",NORTH]]',
epsg=None,
projected=True,
geographic=False,
local=False,
lin_name="US survey foot",
ang_name="Degree",
lin_units=0.3048006096012192,
ang_units=0.0174532925199,
auth={
None: (None, None), # Top-level authority.
"PROJCS": (None, None),
},
attr=(
("PROJCS|GeOgCs|spheroid", "GRS 1980"),
(("projcs", 9), "UNIT"),
(("projcs", 11), "AXIS"),
),
),
# This is really ESRI format, not WKT -- but the import should work the same
TestSRS(
'LOCAL_CS["Non-Earth (Meter)",LOCAL_DATUM["Local Datum",32767],'
'UNIT["Meter",1],AXIS["X",EAST],AXIS["Y",NORTH]]',
esri=True,
epsg=None,
projected=False,
geographic=False,
local=True,
lin_name="Meter",
ang_name="degree",
lin_units=1.0,
ang_units=0.0174532925199,
attr=(("LOCAL_DATUM", "Local Datum"),),
),
)
# Well-Known Names
well_known = (
TestSRS(
'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"]]',
wk="WGS84",
name="WGS 84",
attrs=(("GEOGCS|AUTHORITY", 1, "4326"), ("SPHEROID", "WGS 84")),
),
TestSRS(
'GEOGCS["WGS 72",DATUM["WGS_1972",SPHEROID["WGS 72",6378135,298.26,'
'AUTHORITY["EPSG","7043"]],AUTHORITY["EPSG","6322"]],'
'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
'AUTHORITY["EPSG","4322"]]',
wk="WGS72",
name="WGS 72",
attrs=(("GEOGCS|AUTHORITY", 1, "4322"), ("SPHEROID", "WGS 72")),
),
TestSRS(
'GEOGCS["NAD27",DATUM["North_American_Datum_1927",'
'SPHEROID["Clarke 1866",6378206.4,294.9786982138982,'
'AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6267"]],'
'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
'UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],'
'AUTHORITY["EPSG","4267"]]',
wk="NAD27",
name="NAD27",
attrs=(("GEOGCS|AUTHORITY", 1, "4267"), ("SPHEROID", "Clarke 1866")),
),
TestSRS(
'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"]]',
wk="NAD83",
name="NAD83",
attrs=(("GEOGCS|AUTHORITY", 1, "4269"), ("SPHEROID", "GRS 1980")),
),
TestSRS(
'PROJCS["NZGD49 / Karamea Circuit",GEOGCS["NZGD49",'
'DATUM["New_Zealand_Geodetic_Datum_1949",'
'SPHEROID["International 1924",6378388,297,'
'AUTHORITY["EPSG","7022"]],'
"TOWGS84[59.47,-5.04,187.44,0.47,-0.1,1.024,-4.5993],"
'AUTHORITY["EPSG","6272"]],PRIMEM["Greenwich",0,'
'AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,'
'AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],'
'PROJECTION["Transverse_Mercator"],'
'PARAMETER["latitude_of_origin",-41.28991152777778],'
'PARAMETER["central_meridian",172.1090281944444],'
'PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],'
'PARAMETER["false_northing",700000],'
'UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27216"]]',
wk="EPSG:27216",
name="NZGD49 / Karamea Circuit",
attrs=(
("PROJECTION", "Transverse_Mercator"),
("SPHEROID", "International 1924"),
),
),
)
bad_srlist = (
"Foobar",
'OOJCS["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"]]',
)
class SpatialRefTest(SimpleTestCase):
def test01_wkt(self):
"Testing initialization on valid OGC WKT."
for s in srlist:
SpatialReference(s.wkt)
def test02_bad_wkt(self):
"Testing initialization on invalid WKT."
for bad in bad_srlist:
try:
srs = SpatialReference(bad)
srs.validate()
except (SRSException, GDALException):
pass
else:
self.fail('Should not have initialized on bad WKT "%s"!')
def test03_get_wkt(self):
"Testing getting the WKT."
for s in srlist:
srs = SpatialReference(s.wkt)
# GDAL 3 strips UNIT part in the last occurrence.
self.assertEqual(
s.wkt.replace(',UNIT["Meter",1]', ""),
srs.wkt.replace(',UNIT["Meter",1]', ""),
)
def test04_proj(self):
"""PROJ import and export."""
proj_parts = [
"+proj=longlat",
"+ellps=WGS84",
"+towgs84=0,0,0,0,0,0,0",
"+datum=WGS84",
"+no_defs",
]
srs1 = SpatialReference(srlist[0].wkt)
srs2 = SpatialReference("+proj=longlat +datum=WGS84 +no_defs")
self.assertTrue(all(part in proj_parts for part in srs1.proj.split()))
self.assertTrue(all(part in proj_parts for part in srs2.proj.split()))
def test05_epsg(self):
"Test EPSG import."
for s in srlist:
if s.epsg:
srs1 = SpatialReference(s.wkt)
srs2 = SpatialReference(s.epsg)
srs3 = SpatialReference(str(s.epsg))
srs4 = SpatialReference("EPSG:%d" % s.epsg)
for srs in (srs1, srs2, srs3, srs4):
for attr, expected in s.attr:
self.assertEqual(expected, srs[attr])
def test07_boolean_props(self):
"Testing the boolean properties."
for s in srlist:
srs = SpatialReference(s.wkt)
self.assertEqual(s.projected, srs.projected)
self.assertEqual(s.geographic, srs.geographic)
def test08_angular_linear(self):
"Testing the linear and angular units routines."
for s in srlist:
srs = SpatialReference(s.wkt)
self.assertEqual(s.ang_name, srs.angular_name)
self.assertEqual(s.lin_name, srs.linear_name)
self.assertAlmostEqual(s.ang_units, srs.angular_units, 9)
self.assertAlmostEqual(s.lin_units, srs.linear_units, 9)
def test09_authority(self):
"Testing the authority name & code routines."
for s in srlist:
if hasattr(s, "auth"):
srs = SpatialReference(s.wkt)
for target, tup in s.auth.items():
self.assertEqual(tup[0], srs.auth_name(target))
self.assertEqual(tup[1], srs.auth_code(target))
def test10_attributes(self):
"Testing the attribute retrieval routines."
for s in srlist:
srs = SpatialReference(s.wkt)
for tup in s.attr:
att = tup[0] # Attribute to test
exp = tup[1] # Expected result
self.assertEqual(exp, srs[att])
def test11_wellknown(self):
"Testing Well Known Names of Spatial References."
for s in well_known:
srs = SpatialReference(s.wk)
self.assertEqual(s.name, srs.name)
for tup in s.attrs:
if len(tup) == 2:
key = tup[0]
exp = tup[1]
elif len(tup) == 3:
key = tup[:2]
exp = tup[2]
self.assertEqual(srs[key], exp)
def test12_coordtransform(self):
"Testing initialization of a CoordTransform."
target = SpatialReference("WGS84")
CoordTransform(SpatialReference(srlist[0].wkt), target)
def test13_attr_value(self):
"Testing the attr_value() method."
s1 = SpatialReference("WGS84")
with self.assertRaises(TypeError):
s1.__getitem__(0)
with self.assertRaises(TypeError):
s1.__getitem__(("GEOGCS", "foo"))
self.assertEqual("WGS 84", s1["GEOGCS"])
self.assertEqual("WGS_1984", s1["DATUM"])
self.assertEqual("EPSG", s1["AUTHORITY"])
self.assertEqual(4326, int(s1["AUTHORITY", 1]))
self.assertIsNone(s1["FOOBAR"])
def test_unicode(self):
wkt = (
'PROJCS["DHDN / Soldner 39 Langschoß",'
'GEOGCS["DHDN",DATUM["Deutsches_Hauptdreiecksnetz",'
'SPHEROID["Bessel 1841",6377397.155,299.1528128,AUTHORITY["EPSG","7004"]],'
'AUTHORITY["EPSG","6314"]],'
'PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],'
'UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],'
'AUTHORITY["EPSG","4314"]],PROJECTION["Cassini_Soldner"],'
'PARAMETER["latitude_of_origin",50.66738711],'
'PARAMETER["central_meridian",6.28935703],'
'PARAMETER["false_easting",0],PARAMETER["false_northing",0],'
'UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",NORTH],AXIS["Y",EAST],'
'AUTHORITY["mj10777.de","187939"]]'
)
srs = SpatialReference(wkt)
srs_list = [srs, srs.clone()]
srs.import_wkt(wkt)
for srs in srs_list:
self.assertEqual(srs.name, "DHDN / Soldner 39 Langschoß")
self.assertEqual(srs.wkt, wkt)
self.assertIn("Langschoß", srs.pretty_wkt)
self.assertIn("Langschoß", srs.xml)
@skipIf(GDAL_VERSION < (3, 0), "GDAL >= 3.0 is required")
def test_axis_order(self):
wgs84_trad = SpatialReference(4326, axis_order=AxisOrder.TRADITIONAL)
wgs84_auth = SpatialReference(4326, axis_order=AxisOrder.AUTHORITY)
# Coordinate interpretation may depend on the srs axis predicate.
pt = GEOSGeometry("POINT (992385.4472045 481455.4944650)", 2774)
pt_trad = pt.transform(wgs84_trad, clone=True)
self.assertAlmostEqual(pt_trad.x, -104.609, 3)
self.assertAlmostEqual(pt_trad.y, 38.255, 3)
pt_auth = pt.transform(wgs84_auth, clone=True)
self.assertAlmostEqual(pt_auth.x, 38.255, 3)
self.assertAlmostEqual(pt_auth.y, -104.609, 3)
# clone() preserves the axis order.
pt_auth = pt.transform(wgs84_auth.clone(), clone=True)
self.assertAlmostEqual(pt_auth.x, 38.255, 3)
self.assertAlmostEqual(pt_auth.y, -104.609, 3)
def test_axis_order_invalid(self):
msg = "SpatialReference.axis_order must be an AxisOrder instance."
with self.assertRaisesMessage(ValueError, msg):
SpatialReference(4326, axis_order="other")
@skipIf(GDAL_VERSION > (3, 0), "GDAL < 3.0 doesn't support authority.")
def test_axis_order_non_traditional_invalid(self):
msg = "AxisOrder.AUTHORITY is not supported in GDAL < 3.0."
with self.assertRaisesMessage(ValueError, msg):
SpatialReference(4326, axis_order=AxisOrder.AUTHORITY)
def test_esri(self):
srs = SpatialReference("NAD83")
pre_esri_wkt = srs.wkt
srs.to_esri()
self.assertNotEqual(srs.wkt, pre_esri_wkt)
self.assertIn('DATUM["D_North_American_1983"', srs.wkt)
srs.from_esri()
self.assertIn('DATUM["North_American_Datum_1983"', srs.wkt)
def test_srid(self):
"""The srid property returns top-level authority code."""
for s in srlist:
if hasattr(s, "epsg"):
srs = SpatialReference(s.wkt)
self.assertEqual(srs.srid, s.epsg)
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