class Test(tests.IrisTest):
def setUp(self):
self.latitude_of_projection_origin = 0.0
self.longitude_of_projection_origin = 0.0
self.perspective_point_height = 35785831.0
self.sweep_angle_axis = 'y'
self.false_easting = 0.0
self.false_northing = 0.0
self.semi_major_axis = 6377563.396
self.semi_minor_axis = 6356256.909
self.ellipsoid = GeogCS(self.semi_major_axis, self.semi_minor_axis)
self.globe = ccrs.Globe(semimajor_axis=self.semi_major_axis,
semiminor_axis=self.semi_minor_axis,
ellipse=None)
# Actual and expected coord system can be re-used for
# Geostationary.test_crs_creation and test_projection_creation.
self.expected = ccrs.Geostationary(
central_longitude=self.longitude_of_projection_origin,
satellite_height=self.perspective_point_height,
false_easting=self.false_easting,
false_northing=self.false_northing,
globe=self.globe,
sweep_axis=self.sweep_angle_axis)
self.geo_cs = Geostationary(self.latitude_of_projection_origin,
self.longitude_of_projection_origin,
self.perspective_point_height,
self.sweep_angle_axis, self.false_easting,
self.false_northing, self.ellipsoid)
def test_crs_creation(self):
res = self.geo_cs.as_cartopy_crs()
self.assertEqual(res, self.expected)
def test_projection_creation(self):
res = self.geo_cs.as_cartopy_projection()
self.assertEqual(res, self.expected)
def test_non_zero_lat(self):
with six.assertRaisesRegex(self, ValueError, 'Non-zero latitude'):
Geostationary(0.1, self.longitude_of_projection_origin,
self.perspective_point_height, self.sweep_angle_axis,
self.false_easting, self.false_northing,
self.ellipsoid)
def test_invalid_sweep(self):
with six.assertRaisesRegex(self, ValueError,
'Invalid sweep_angle_axis'):
Geostationary(self.latitude_of_projection_origin,
self.longitude_of_projection_origin,
self.perspective_point_height, 'a',
self.false_easting, self.false_northing,
self.ellipsoid)
class Test(tests.IrisTest):
def setUp(self):
# Set everything to non-default values.
self.latitude_of_projection_origin = 0 # For now, Cartopy needs =0.
self.longitude_of_projection_origin = 123.0
self.perspective_point_height = 9999.0
self.sweep_angle_axis = "x"
self.false_easting = 100.0
self.false_northing = -200.0
self.semi_major_axis = 4000.0
self.semi_minor_axis = 3900.0
self.ellipsoid = GeogCS(self.semi_major_axis, self.semi_minor_axis)
self.globe = ccrs.Globe(
semimajor_axis=self.semi_major_axis,
semiminor_axis=self.semi_minor_axis,
ellipse=None,
)
# Actual and expected coord system can be re-used for
# Geostationary.test_crs_creation and test_projection_creation.
self.expected = ccrs.Geostationary(
central_longitude=self.longitude_of_projection_origin,
satellite_height=self.perspective_point_height,
false_easting=self.false_easting,
false_northing=self.false_northing,
globe=self.globe,
sweep_axis=self.sweep_angle_axis,
)
self.geo_cs = Geostationary(
self.latitude_of_projection_origin,
self.longitude_of_projection_origin,
self.perspective_point_height,
self.sweep_angle_axis,
self.false_easting,
self.false_northing,
self.ellipsoid,
)
def test_crs_creation(self):
res = self.geo_cs.as_cartopy_crs()
self.assertEqual(res, self.expected)
def test_projection_creation(self):
res = self.geo_cs.as_cartopy_projection()
self.assertEqual(res, self.expected)
def test_non_zero_lat(self):
with self.assertRaisesRegex(ValueError, "Non-zero latitude"):
Geostationary(
0.1,
self.longitude_of_projection_origin,
self.perspective_point_height,
self.sweep_angle_axis,
self.false_easting,
self.false_northing,
self.ellipsoid,
)
def test_invalid_sweep(self):
with self.assertRaisesRegex(ValueError, "Invalid sweep_angle_axis"):
Geostationary(
self.latitude_of_projection_origin,
self.longitude_of_projection_origin,
self.perspective_point_height,
"a",
self.false_easting,
self.false_northing,
self.ellipsoid,
)
def test_set_optional_args(self):
# Check that setting the optional (non-ellipse) args works.
crs = Geostationary(0,
0,
1000,
"y",
false_easting=100,
false_northing=-200)
self.assertEqualAndKind(crs.false_easting, 100.0)
self.assertEqualAndKind(crs.false_northing, -200.0)
def _check_crs_defaults(self, crs):
# Check for property defaults when no kwargs options were set.
# NOTE: except ellipsoid, which is done elsewhere.
self.assertEqualAndKind(crs.false_easting, 0.0)
self.assertEqualAndKind(crs.false_northing, 0.0)
def test_no_optional_args(self):
# Check expected defaults with no optional args.
crs = Geostationary(0, 0, 1000, "y")
self._check_crs_defaults(crs)
def test_optional_args_None(self):
# Check expected defaults with optional args=None.
crs = Geostationary(0,
0,
1000,
"y",
false_easting=None,
false_northing=None)
self._check_crs_defaults(crs)