[GRASS-dev] r.sun using EPSG:3031 projection gives strange results

Pierre Roudier pierre.roudier at gmail.com
Mon Jun 17 04:57:01 PDT 2013

Dear devs,

I am working on Antarctica data, projected in Antarctic Polar
Stereographic (EPSG:3031, [0,1]). This projection puts the South Pole
in the "center" of the map.

I have strange results in the Ross Sea Region using r.sun from GRASS 7
compiled from trunk (SVN checkout probably about less than one month
ago): According to the r.sun results, the south facing slope receive
more radiation than the north facing one, which doesn't add up.

Is this a limitation of r.sun, a bug, or am I missing something here?



[0] http://spatialreference.org/ref/epsg/3031/
[1] http://nsidc.org/data/atlas/epsg_3031.html

Landcare Research, New Zealand

More information about the grass-dev mailing list