SpheroidalDistance — distance between two points on a spheroid

Eccentricity  ▪  SemimajorAxis

SphericalDistance — distance between two points on a sphere

ToAuthalicRadius — radius of the authalic sphere based on a given spheroid

GeodeticToAuthalic — coordinates of a point on an authalic sphere

ToDegrees — convert a coordinate from DMS to degrees

ToDMS — convert from degrees to DMS