On Mon, Mar 26, 2012 at 5:32 PM, Filipe Silva Dias <[email protected]> wrote: > Thanks, it took a while but it worked.
You are welcome to compare it to alternatives ;) > > > On Mon, Mar 26, 2012 at 3:11 PM, Markus Metz > <[email protected]> wrote: >> >> On Sun, Mar 25, 2012 at 2:59 PM, Filipe Silva Dias >> <[email protected]> wrote: >> > Thanks. Out of curiosity and tried with Grass 7 with -m (and 30 m >> > resolution) and I obtained this error message: >> > >> > r.watershed -m elevation=DemPT2@Grass7 threshold=10000 >> > stream=streams >> > SECTION 1 beginning: Initiating Variables. 5 sections total. >> > SECTION 1a: Mark masked and NULL cells >> > SECTION 1b: Determining Offmap Flow. >> > SECTION 2: A* Search. >> > SECTION 3: Accumulating Surface Flow with MFD. >> > SECTION 4: Watershed determination. >> > SECTION 5: Closing Maps. >> > ERROR: Rast_make_random_colors: min (1) > max (0) >> >> Apparently no basins were determined, probably because the threshold >> of 10000 for flow accumulation was never reached. Maybe the current >> region was either too small or did not cover parts of the DEM DemPT2? >> >> BTW, if you want to try out GRASS 7 in a separate mapset, you don't >> need to copy over the DEM if you just want to read it. Within the >> mapset Grass7, the following commands should work: >> g.region -p rast=DemPt@ETRS89 >> r.watershed elevation=DemPt@ETRS89 stream=stream threshold=10000 -m >> >> Markus M >> >> > >> > Subprocess failed with exit code 1 >> > category information for [streams] in [Grass7] missing or invalid >> > >> > >> > >> > >> > On Sun, Mar 25, 2012 at 11:49 AM, Markus Metz >> > <[email protected]> wrote: >> >> >> >> On Sun, Mar 25, 2012 at 12:30 PM, Filipe Silva Dias >> >> <[email protected]> wrote: >> >> > I switched the resolution from 30x30 to 100x100 and now it works. >> >> > Problem >> >> > solved. >> >> > >> >> > >> >> > On Sun, Mar 25, 2012 at 11:12 AM, Filipe Silva Dias >> >> > <[email protected]> >> >> > wrote: >> >> >> >> >> >> I'm using GRASS 6.4.2 and I'm on Windows 7 >> >> >> >> >> >> >> >> >> On Sun, Mar 25, 2012 at 11:11 AM, Filipe Silva Dias >> >> >> <[email protected]> wrote: >> >> >>> >> >> >>> Dear all >> >> >>> >> >> >>> I'm trying to run r.watershed on a ASTER DEM (with the size of >> >> >>> Portugal) >> >> >>> but I'm getting this error: >> >> >>> >> >> >>> r.watershed elevation=DemPt@ETRS89 stream=stream >> >> >>> threshold=10000 >> >> >>> SECTION 1a (of 5): Initiating Memory. >> >> >>> ERROR: G_malloc: unable to allocate 1515173064 bytes at >> >> >>> init_vars.c:134 >> >> >>> Subprocess failed with exit code 1 >> >> >>> category information for [stream] in [ETRS89] missing or invalid >> >> >>> >> >> >>> What am I doing wrong? >> >> >>> >> >> As you figured out already, the region, i.e. number of cells was too >> >> large. In order to run r.watershed with that region (Portugal at 30m >> >> resolution) on Windows, you would need GRASS 7 and run r.watershed >> >> with the -m option. >> >> >> >> Markus M >> > >> > > > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
