Hi, Is there a 3D version of geod.inv/fwd? i.e lon1,lat1,alt1,lon2,lat2,alt2 -> azi12,s12,elevation12 lon1,lat1,alt1,azi12,s12,elevation12 -> lon2,lat2,alt2 Kind regards, Idan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osgeo.org/pipermail/proj/attachments/20210628/ea2c373e/attachment.html>