Am 31.01.2017 um 17:46 schrieb
niels.vonfestenberg-packisch....@rohde-schwarz.com:
Hi all,
I would like to transform local cartesian coordinates into longitude and
latitude. According to all the documentation I could find, I tried doing
this (in C++, specifying a center for the orthographic projection at 56 N
15 E):
projPJ cSourceProjection = pj_init_plus("+proj=ortho +ellps=WGS84
+datum=WGS84 +lat_0=56 +lon_0=15 +no_defs");
projPJ cTargetProjection = pj_init_plus("+proj=longlat +ellps=WGS84
+datum=WGS84 +no_defs");
Could you maybe give me a hint what is going wrong here?
You have not told GDAL that your projected data is in meters, so add
+units=m to your "from" proj.4 string.
HTH,
André Joost
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