| pe_eta_to_phi | |
Calculates the geodetic latitude from the reduced latitude
double pe_eta_to_phi (double e2, double eta);
| e2 | Eccentricity squared of the spheroid |
| eta | Reduced latitude (measured in radians) of the point |
The reduced or parametric latitude is a latitude on a sphere of radius a (where a is the semimajor axis of a spheroid). The reduced latitude is the angle formed between the equatorial plane and a line from the center of the sphere to a point on the sphere that is at the same distance from the polar axis as the geodetic latitude.
Geodetic latitude (measured in radians) of the point