[GRASS-user] long run time with r.sunmask

[Dylan Beaudette]

Hi everyone,

using the latest CVS, I noticed that running r.sunmaks on a relatively small 
region (300x300 cells) took a very long time to run (about 15 minutes). I am 
using a DEM for the location and specifying the time of day, and day of the 
year. I used the following command:

r.sunmask elev=elev_meters out=shadows_afternoon timezone=-8 year=2007 month=3 
day=31 hour=16 minute=00 second=00

Any idea on why this would take so long?

cheers,

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341