A Rational Parametric Approach to Latitude, Longitude, and Altitude
JOSHUA ZEV LEVIN · NAVIGATION Journal of the Institute of Navigation · 1988
A method for parametrically representing the surface of the earth is described. Latitude and longitude are replaced by parametric pseudolatitude and pseudolongitude. Conversions between Cartesian coordinates in three-space and the parametric form are described. A compact and precise algorithm for Cartesian-to-parametric form has been developed by way of tested computer procedures.