On Sun, May 23, 2010 at 8:10 PM, Kurt Springs <[email protected]> wrote: > Problem was the resolution it starts working when I set it to 100m. The dem > is ~69 x 27 km.
Apparently, the dem has a resolution of 1/3 arcsec (~10m), maybe reprojected and resampled. With these extends, there would be about 186 million cells in the input map which is not a lot. I have successfully processed regions with ~250 million cells in memory and ~500 million cells in segmented mode. Make sure the current computational region matches the resolution of the input dem and the extends of the current computational region do not exceed the extends of the input map. Setting the computational region to a smaller area within the dem coverage is fine, as long as g.region -p align=NED13_01 is used after adjusting the extends. A resolution of 100m throws away a lot of the information present in the original dem. > Thanks > On May 23, 2010, at 12:00 PM, Rich Shepard wrote: > > On Sat, 22 May 2010, Kurt Springs wrote: > > ERROR: G_malloc: unable to allocate 18446744070980740804 bytes at ... > > ^^^^^^^^^^^^^^^^^^^^ > > Any idea what I'm doing wrong? > > Kurt, > > Look at the amount of memory your file wants to be allocated: several > Petabytes. How much area is covered by that DEM and at what resolution? Even > with GRASS compiled for large file support your file is _way_ too large. > > Rich > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
