def _oblique_mercator(cf_params):
"""
http://cfconventions.org/cf-conventions/cf-conventions.html#_oblique_mercator
"""
return HotineObliqueMercatorBConversion(
latitude_projection_centre=cf_params["latitude_of_projection_origin"],
longitude_projection_centre=cf_params[
"longitude_of_projection_origin"],
azimuth_initial_line=cf_params["azimuth_of_central_line"],
angle_from_rectified_to_skew_grid=0.0,
scale_factor_on_initial_line=cf_params.get(
"scale_factor_at_projection_origin", 1.0),
easting_projection_centre=cf_params.get("false_easting", 0.0),
northing_projection_centre=cf_params.get("false_northing", 0.0),
)
def test_hotline_oblique_mercator_b_operation__defaults():
hop = HotineObliqueMercatorBConversion(
latitude_projection_centre=0,
longitude_projection_centre=0,
azimuth_initial_line=0,
angle_from_rectified_to_skew_grid=0,
)
assert hop.name == "unknown"
assert hop.method_name == "Hotine Oblique Mercator (variant B)"
assert _to_dict(hop) == {
"Latitude of projection centre": 0.0,
"Longitude of projection centre": 0.0,
"Azimuth of initial line": 0.0,
"Angle from Rectified to Skew Grid": 0.0,
"Scale factor on initial line": 1.0,
"Easting at projection centre": 0.0,
"Northing at projection centre": 0.0,
}