On Sun, 2008-06-15 at 22:30 +0200, Nikos Alexandris wrote: > 1. > r.horizon elevin=srtm3_stel step=45 horizon=horizon_45 coord=4275945
# This is a bug and will be fixed. > 2. > (using r.sun2 in a loop) > > for i in `seq 92 304`; do r.sun2 -s --o elevin=srtm3_stel > aspin=aspect_stel slopein=slope_stel alb=0.23 lin=5.2 lat=4275945 > horizon=horizon.45 horizonstep=45 glob_rad=global_rad_$i day=$i; done I created latitude and longitude maps, re-run r.sun2 and compared a day (on derived from the above command and another one derived from the command below). The results seem rational now. r.sun2 -s elevin=srtm3_for_global_rad aspin=aspect_for_global_rad slopein=slope_for_global_rad alb=0.23 lin=5.2 latin=latitude_for_global_rad longin=longitude_for_global_rad horizon=horizon.45 horizonstep=45 glob_rad=global_rad_testday92 day=92 So the question is now, why when using a fixed lat value, the northern expositions have a higher radiation than the southern expositions? _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user