Creates a geodesy instance for the given reference that performs geodesy
calculations using spherical approximations of the ellipsoid associated with the given
reference. The results of the calculations performed by this type of geodesy instance are less
accurate than the ellipsoidal variants, but can be computed faster.
If earthRadius is specified instances returned by this method will use the given radius when performing
spherical calculations.
Otherwise an appropriate value for the earth radius will be chosen automatically based on the ellipsoid
associated with the given reference.
Creates a geodesy instance for the given reference that performs geodesy calculations using spherical approximations of the ellipsoid associated with the given reference. The results of the calculations performed by this type of geodesy instance are less accurate than the ellipsoidal variants, but can be computed faster.
If earthRadius is specified instances returned by this method will use the given radius when performing spherical calculations. Otherwise an appropriate value for the earth radius will be chosen automatically based on the ellipsoid associated with the given reference.