Paul Surgeon writes: > > Does anyone know how to determine the tangent to a point on a wgs84 ellipsoid?
this should help FG_SRC / tests / test_up.cxx > Are there any good sources that will walk me through ellisoid maths > step-by-step? There are many my favorite are http://www.colorado.edu/geography/gcraft/notes/datum/datum.html http://earth-info.nima.mil/GandG/geolay/toc.htm http://www.irbs.com/bowditch/ My favorite text Bomford, G. 1980. Geodesy. Oxford: Clarendon Press You might also find this code helpful http://www.remotesensing.org/cgi-bin/cvsweb.cgi/osrs/proj/src/geocent.c?rev=1.3&content-type=text/x-cvsweb-markup Norman _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
