[Proj] Problems with Pittman geodesic??

[Charles Karney]

Well, for sure, the Pittman results you quote can't be right.  The back
azimuth is just about due west.  So increasing the longitude of point 2
by 0.4 deg should increase geodesic by roughly 0.4 * cos(lat2) * 10^7/90
m = 31.5 km.  Can't you nail this down with solutions to the forward
problem?

-- 
Charles Karney <ckarney at sarnoff.com>
Sarnoff Corporation, Princeton, NJ 08543-5300

URL: http://charles.karney.info
Tel: +1 609 734 2312
Fax: +1 609 734 2662