[GRASS-dev] Re: [GRASS GIS] #498: r.sun2 commissioning trials

[GRASS GIS]

#498: r.sun2 commissioning trials
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 Reporter:  hamish  |       Owner:  hamish          
     Type:  defect  |      Status:  assigned        
 Priority:  major   |   Milestone:  6.4.2           
Component:  Raster  |     Version:  svn-develbranch6
 Keywords:  r.sun   |    Platform:  All             
      Cpu:  All     |  
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Comment(by hamish):

 Replying to [comment:17 dylan]:
 > Has any progress been made on this topic?

 a couple of weeks ago I applied the patch which avoided using libproj in
 the main loop, making things faster and fixing a modern rotational bug,
 but I don't think that's relevant to what you describe below.

 > I recently re-computed an annual global radiance calculation with GRASS7
 (previously with GRASS65), using only the elevation input (previously used
 elev, slope, aspect). The results were astounding. Zooming into a smaller
 region and checking, it appears as if the reflected radiance raster was
 all 0s and the diffuse radiance raster was a vertical gradient across the
 region-- with no apparent influence from the local terrain. When using
 slope and aspect inputs the output appears to be correct.
 >
 > I'll work up examples tonight and re-post with figures, code, and the
 DEM in question.

 this is surprising news to me. please let us know what you find out.
 I'd like to sort it out before applying the OpenCL GPU patches (but
 the autoconf ./configure changes don't have to wait).


 thanks,
 Hamish

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/498#comment:18>
GRASS GIS <http://grass.osgeo.org>