[Proj] Difference in Orthographic projection between Proj4 and Global Mapper
mangahair at gmail.com
Thu Jul 7 10:00:06 EST 2016
Thanks for all the replies and suggestions so far,
After more testing, which shows that we can get identical results in proj4
as GlobalMapper using a spheroid radius of 6367444.66m. This is the midpoint
of the standard WGS84 semi-major (6378137) and semi-minor axes radii
This seems to be different from the normal mean earth radius used by GCTP
Waiting on a a reply from Blue Marble, loathing to think about all the data
which could now be wrong and again thanking you all for your time.
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