def setUp(self): self.latitude_of_projection_origin = 0.0 self.longitude_of_projection_origin = 0.0 self.perspective_point_height = 38204820000.0 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 # VerticalPerspective.test_crs_creation and test_projection_creation. self.expected = ccrs.NearsidePerspective( central_longitude=self.longitude_of_projection_origin, central_latitude=self.latitude_of_projection_origin, satellite_height=self.perspective_point_height, false_easting=self.false_easting, false_northing=self.false_northing, globe=self.globe) self.vp_cs = VerticalPerspective(self.latitude_of_projection_origin, self.longitude_of_projection_origin, self.perspective_point_height, self.false_easting, self.false_northing, self.ellipsoid)
def setUp(self): self.latitude_of_projection_origin = 0.0 self.longitude_of_projection_origin = 0.0 self.semi_major_axis = 6377563.396 self.semi_minor_axis = 6356256.909 self.perspective_point_height = 38204820000.0 self.ellipsoid = GeogCS(self.semi_major_axis, self.semi_minor_axis) self.vp_cs = VerticalPerspective(self.latitude_of_projection_origin, self.longitude_of_projection_origin, self.perspective_point_height, ellipsoid=self.ellipsoid)
def test_vp_cs(self): latitude_of_projection_origin = 1.0 longitude_of_projection_origin = 2.0 perspective_point_height = 2000000.0 false_easting = 100.0 false_northing = 200.0 semi_major_axis = 6377563.396 semi_minor_axis = 6356256.909 ellipsoid = GeogCS(semi_major_axis, semi_minor_axis) coord_system = VerticalPerspective( latitude_of_projection_origin=latitude_of_projection_origin, longitude_of_projection_origin=longitude_of_projection_origin, perspective_point_height=perspective_point_height, false_easting=false_easting, false_northing=false_northing, ellipsoid=ellipsoid) expected = { 'grid_mapping_name': b'vertical_perspective', 'latitude_of_projection_origin': latitude_of_projection_origin, 'longitude_of_projection_origin': longitude_of_projection_origin, 'perspective_point_height': perspective_point_height, 'false_easting': false_easting, 'false_northing': false_northing, 'semi_major_axis': semi_major_axis, 'semi_minor_axis': semi_minor_axis, 'longitude_of_prime_meridian': 0, } self._test(coord_system, expected)
def test_set_optional_args(self): # Check that setting the optional (non-ellipse) args works. crs = VerticalPerspective( 0, 0, 1000, false_easting=100, false_northing=-203.7 ) self.assertEqualAndKind(crs.false_easting, 100.0) self.assertEqualAndKind(crs.false_northing, -203.7)
def test_vp_cs(self): latitude_of_projection_origin = 1.0 longitude_of_projection_origin = 2.0 perspective_point_height = 2000000.0 false_easting = 100.0 false_northing = 200.0 semi_major_axis = 6377563.396 semi_minor_axis = 6356256.909 ellipsoid = GeogCS(semi_major_axis, semi_minor_axis) coord_system = VerticalPerspective( latitude_of_projection_origin=latitude_of_projection_origin, longitude_of_projection_origin=longitude_of_projection_origin, perspective_point_height=perspective_point_height, false_easting=false_easting, false_northing=false_northing, ellipsoid=ellipsoid, ) expected = { "grid_mapping_name": b"vertical_perspective", "latitude_of_projection_origin": latitude_of_projection_origin, "longitude_of_projection_origin": longitude_of_projection_origin, "perspective_point_height": perspective_point_height, "false_easting": false_easting, "false_northing": false_northing, "semi_major_axis": semi_major_axis, "semi_minor_axis": semi_minor_axis, "longitude_of_prime_meridian": 0, } self._test(coord_system, expected)
def test_optional_args_None(self): # Check expected defaults with optional args=None. crs = VerticalPerspective(0, 0, 1000, false_easting=None, false_northing=None) self._check_crs_defaults(crs)
def _test(self, inverse_flattening=False, no_offsets=False): """ Generic test that can check vertical perspective validity with or without inverse flattening, and false_east/northing-s. """ test_easting = 100.0 test_northing = 200.0 cf_grid_var_kwargs = { "spec": [], "latitude_of_projection_origin": 1.0, "longitude_of_projection_origin": 2.0, "perspective_point_height": 2000000.0, "false_easting": test_easting, "false_northing": test_northing, "semi_major_axis": 6377563.396, } ellipsoid_kwargs = {"semi_major_axis": 6377563.396} if inverse_flattening: ellipsoid_kwargs["inverse_flattening"] = 299.3249646 else: ellipsoid_kwargs["semi_minor_axis"] = 6356256.909 cf_grid_var_kwargs.update(ellipsoid_kwargs) if no_offsets: del cf_grid_var_kwargs["false_easting"] del cf_grid_var_kwargs["false_northing"] test_easting = 0 test_northing = 0 cf_grid_var = mock.Mock(**cf_grid_var_kwargs) ellipsoid = iris.coord_systems.GeogCS(**ellipsoid_kwargs) cs = build_vertical_perspective_coordinate_system(None, cf_grid_var) expected = VerticalPerspective( latitude_of_projection_origin=cf_grid_var. latitude_of_projection_origin, longitude_of_projection_origin=cf_grid_var. longitude_of_projection_origin, perspective_point_height=cf_grid_var.perspective_point_height, false_easting=test_easting, false_northing=test_northing, ellipsoid=ellipsoid, ) self.assertEqual(cs, expected)
class Test_cartopy_projection(tests.IrisTest): def setUp(self): self.latitude_of_projection_origin = 0.0 self.longitude_of_projection_origin = 0.0 self.semi_major_axis = 6377563.396 self.semi_minor_axis = 6356256.909 self.perspective_point_height = 38204820000.0 self.ellipsoid = GeogCS(self.semi_major_axis, self.semi_minor_axis) self.vp_cs = VerticalPerspective( self.latitude_of_projection_origin, self.longitude_of_projection_origin, self.perspective_point_height, ellipsoid=self.ellipsoid, ) def test_projection_creation(self): res = self.vp_cs.as_cartopy_projection() globe = ccrs.Globe(semimajor_axis=self.semi_major_axis, semiminor_axis=self.semi_minor_axis, ellipse=None) expected = ccrs.Geostationary(self.longitude_of_projection_origin, self.perspective_point_height, globe=globe) self.assertEqual(res, expected)
class Test_cartopy_projection(tests.IrisTest): def setUp(self): self.latitude_of_projection_origin = 0.0 self.longitude_of_projection_origin = 0.0 self.semi_major_axis = 6377563.396 self.semi_minor_axis = 6356256.909 self.perspective_point_height = 38204820000.0 self.ellipsoid = GeogCS(self.semi_major_axis, self.semi_minor_axis) self.vp_cs = VerticalPerspective(self.latitude_of_projection_origin, self.longitude_of_projection_origin, self.perspective_point_height, ellipsoid=self.ellipsoid) def test_projection_creation(self): res = self.vp_cs.as_cartopy_projection() globe = ccrs.Globe(semimajor_axis=self.semi_major_axis, semiminor_axis=self.semi_minor_axis, ellipse=None) expected = ccrs.Geostationary(self.longitude_of_projection_origin, self.perspective_point_height, globe=globe) self.assertEqual(res, expected)
def _test(self, inverse_flattening=False): """ Generic test that can check vertical perspective validity with or without inverse flattening. """ cf_grid_var_kwargs = { 'spec': [], 'latitude_of_projection_origin': 1.0, 'longitude_of_projection_origin': 2.0, 'perspective_point_height': 2000000.0, 'false_easting': 100.0, 'false_northing': 200.0, 'semi_major_axis': 6377563.396 } ellipsoid_kwargs = {'semi_major_axis': 6377563.396} if inverse_flattening: ellipsoid_kwargs['inverse_flattening'] = 299.3249646 else: ellipsoid_kwargs['semi_minor_axis'] = 6356256.909 cf_grid_var_kwargs.update(ellipsoid_kwargs) cf_grid_var = mock.Mock(**cf_grid_var_kwargs) ellipsoid = iris.coord_systems.GeogCS(**ellipsoid_kwargs) cs = build_vertical_perspective_coordinate_system(None, cf_grid_var) expected = VerticalPerspective( latitude_of_projection_origin=cf_grid_var. latitude_of_projection_origin, longitude_of_projection_origin=cf_grid_var. longitude_of_projection_origin, perspective_point_height=cf_grid_var.perspective_point_height, false_easting=cf_grid_var.false_easting, false_northing=cf_grid_var.false_northing, ellipsoid=ellipsoid) self.assertEqual(cs, expected)
def test_lat(self): with self.assertRaises(ValueError): res = VerticalPerspective(self.latitude_of_projection_origin, self.longitude_of_projection_origin, self.perspective_point_height, ellipsoid=self.ellipsoid)
def test_no_optional_args(self): # Check expected defaults with no optional args. crs = VerticalPerspective(0, 0, 1000) self._check_crs_defaults(crs)
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 = 38204820000.0 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 # VerticalPerspective.test_crs_creation and test_projection_creation. self.expected = ccrs.NearsidePerspective( central_longitude=self.longitude_of_projection_origin, central_latitude=self.latitude_of_projection_origin, satellite_height=self.perspective_point_height, false_easting=self.false_easting, false_northing=self.false_northing, globe=self.globe, ) self.vp_cs = VerticalPerspective( self.latitude_of_projection_origin, self.longitude_of_projection_origin, self.perspective_point_height, self.false_easting, self.false_northing, self.ellipsoid, ) def test_crs_creation(self): res = self.vp_cs.as_cartopy_crs() self.assertEqual(res, self.expected) def test_projection_creation(self): res = self.vp_cs.as_cartopy_projection() self.assertEqual(res, self.expected) def test_set_optional_args(self): # Check that setting the optional (non-ellipse) args works. crs = VerticalPerspective( 0, 0, 1000, false_easting=100, false_northing=-203.7 ) self.assertEqualAndKind(crs.false_easting, 100.0) self.assertEqualAndKind(crs.false_northing, -203.7) 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 = VerticalPerspective(0, 0, 1000) self._check_crs_defaults(crs) def test_optional_args_None(self): # Check expected defaults with optional args=None. crs = VerticalPerspective( 0, 0, 1000, false_easting=None, false_northing=None ) self._check_crs_defaults(crs)