As of Version 7.0, GeodeticToAuthalic has been renamed to "FromAuthalicLatitude" and has become a property of GeodesyData.

gives the coordinates of the corresponding point on an authalic sphere given the latitude and longitude of a point on a spheroid with specified eccentricity.


  • To use GeodeticToAuthalic, you first need to load the Geodesy Package using Needs["Geodesy`"].
  • Coordinates latitude and longitude are the geodetic coordinates of the point on the spheroid.