[Proj] Geodesics in terms of elliptic integrals

Charles Karney charles.karney at sri.com
Tue Oct 16 16:10:31 EST 2012

GeographicLib now supports the solution of geodesic problems via
elliptic integrals.  For details, see


This allows geodesics to be computed on ellipsoids with 0.01 < b/a <

I know this will seen useless to you earthlings; however the work was
done in response to a request from the European Molecular Biology
Laboratory to support measuring distances on the surface of ellipsoidal
molecules with b/a = 3.

Charles Karney <charles.karney at sri.com>
SRI International, Princeton, NJ 08543-5300

Tel: +1 609 734 2312
Fax: +1 609 734 2662

More information about the Proj mailing list