[GRASS-dev] r.viewshed update && comparing resolutions

Markus Neteler neteler at osgeo.org
Wed Oct 22 18:03:17 EDT 2008


On Wed, Oct 22, 2008 at 10:12 AM, Markus Neteler <neteler at osgeo.org> wrote:
> I was finally trying r.viewshed but got some troubles:
>
> GRASS 6.4.svn (patUTM32):~ > r.viewshed input=pat_dtm_5m
> output=viewshed viewpoint_location=663435,5104325
...
> Start sweeping.
> total size of eventlist is 89777808 B (85 MB);  size_t is 8 B
> max size_t is -1
> running the program in-memory mode requires memory beyond the
> capability of the platform. Use external mode, or 64-bit platform.

Thanks to Laura, fixed in Addons-SVN.

I made a test:
- r.los: 4.5 hours
- r.viewshed: 18 seconds.

AMAZING.

Markus


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