pe_phi_to_chi

Calculates the conformal latitude from the geographic latitude

Usage syntax

double pe_phi_to_chi (double e2, double phi);

Parameters
e2 Eccentricity squared of the spheroid
phi Geographic latitude (measured in radians) of the point
Description

Conformal latitude is used to map the spheroid to an auxiliary sphere in such a way that the angles are preserved.

Returns

Conformal latitude (measured in radians) of the point