I have been trying to run r.horizon on a SRTM DEM for the continental US, with no success. The operation runs for about 45 minutes then eventually just stops with no warnings or errors
I'm running GRASS 6.4-rc5 64-bit in Ubuntu 9.10 on a virtual machine (Virtual Box on Windows XP 64-bit). The r.horizon function will consume as much RAM as apply to the machine, up to 6144 MB, plus an additional 4GB of swap memory. The DEM is in Geographic coordinates - WGS 84. I tried to run r.horizon in only 1 direction with maximum distance of 5310 meters. Is there a file size limitation? Or any suggestions for an optimal size? Thanks, Josh Joshua Campbell Kansas Applied Remote Sensing Program University of Kansas Lawrence, KS
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