def test_vertical_perspective():
crs = ProjectedCRS(
conversion=VerticalPerspectiveConversion(50, 0, 1, 0, 2, 3))
expected_cf = {
"semi_major_axis": 6378137.0,
"semi_minor_axis": crs.ellipsoid.semi_minor_metre,
"inverse_flattening": crs.ellipsoid.inverse_flattening,
"reference_ellipsoid_name": "WGS 84",
"longitude_of_prime_meridian": 0.0,
"prime_meridian_name": "Greenwich",
"horizontal_datum_name": "World Geodetic System 1984",
"grid_mapping_name": "vertical_perspective",
"perspective_point_height": 50.0,
"latitude_of_projection_origin": 0.0,
"longitude_of_projection_origin": 1.0,
"false_easting": 2.0,
"false_northing": 3.0,
"geographic_crs_name": "undefined",
"projected_crs_name": "undefined",
}
cf_dict = crs.to_cf()
assert cf_dict.pop("crs_wkt").startswith("PROJCRS[")
assert cf_dict == expected_cf
# test roundtrip
_test_roundtrip(expected_cf, "PROJCRS[")
def test_vertical_perspective_operation__defaults():
aeaop = VerticalPerspectiveConversion(viewpoint_height=10)
assert aeaop.name == "unknown"
assert aeaop.method_name == "Vertical Perspective"
assert _to_dict(aeaop) == {
"Latitude of topocentric origin": 0.0,
"Longitude of topocentric origin": 0.0,
"Ellipsoidal height of topocentric origin": 0.0,
"Viewpoint height": 10.0,
"False easting": 0.0,
"False northing": 0.0,
}
def _vertical_perspective(cf_params):
"""
http://cfconventions.org/cf-conventions/cf-conventions.html#vertical-perspective
"""
return VerticalPerspectiveConversion(
viewpoint_height=cf_params["perspective_point_height"],
latitude_topocentric_origin=cf_params.get(
"latitude_of_projection_origin", 0.0),
longitude_topocentric_origin=cf_params.get(
"longitude_of_projection_origin", 0.0),
false_easting=cf_params.get("false_easting", 0.0),
false_northing=cf_params.get("false_northing", 0.0),
)
def test_vertical_perspective_operation():
aeaop = VerticalPerspectiveConversion(
viewpoint_height=10,
latitude_topocentric_origin=1,
longitude_topocentric_origin=2,
false_easting=3,
false_northing=4,
ellipsoidal_height_topocentric_origin=5,
)
assert aeaop.name == "unknown"
assert aeaop.method_name == "Vertical Perspective"
assert _to_dict(aeaop) == {
"Latitude of topocentric origin": 1.0,
"Longitude of topocentric origin": 2.0,
"Ellipsoidal height of topocentric origin": 5.0,
"Viewpoint height": 10.0,
"False easting": 3.0,
"False northing": 4.0,
}