[GRASS-dev] [GRASS GIS] #2014: r.sun using EPSG:3031 projection gives strange results

GRASS GIS trac at osgeo.org
Sat Sep 14 20:54:24 PDT 2013

#2014: r.sun using EPSG:3031 projection gives strange results
 Reporter:  pierreroudier  |       Owner:  grass-dev@…              
     Type:  defect         |      Status:  new                      
 Priority:  normal         |   Milestone:  7.0.0                    
Component:  Raster         |     Version:  svn-trunk                
 Keywords:  r.sun          |    Platform:  Linux                    
      Cpu:  x86-64         |  

Comment(by hamish):

 yeah, looking at the results for day=1 and 30 there's significantly more
 light showing on the true-south side of Erebus at that time of year. To
 test if that's a counter-intuitive cumulative time-spent effect or not,
 next things to try I think are to plot the sun's position through the day,
 and try it in another Antarctic stereographic projection that puts grid-
 north and true-north in alignment and see if we get the same result.


Ticket URL: <https://trac.osgeo.org/grass/ticket/2014#comment:6>
GRASS GIS <http://grass.osgeo.org>

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