`c_reduced_lat_from_geodetic_lat`#

double Ellipsoid.c_reduced_lat_from_geodetic_lat(double geodetic_lat)#

Compute the reduced (parametric) latitude \(\beta\) from a geodetic latitude \(\phi\).

\[\beta = \arctan\bigl((1 - f)\,\tan\phi\bigr)\]

All angles are in radians (SI).

param geodetic_lat:: Geodetic latitude \(\phi\) in radians on the reference ellipsoid.
returns:: Reduced (parametric) latitude \(\beta\) in radians.
rtype:: float

See also

c_geodetic_lat_from_reduced_lat: Inverse transform (φ from β).
reduced_lat_from_geodetic_lat: Vectorized Python wrapper.

Note

Releases the GIL and uses a low-level C implementation for speed.