Milton Cezar Ribeiro: > Hi Markus, > > I will try that. The GRASS_VECTOR_LOWMEM=1 works only for G7?
Yes, only for G7. Also Large File Support for wingrass is only available in G7. > > Markus Metz: >> >> On Sat, Feb 12, 2011 at 11:58 AM, Milton Cezar Ribeiro >> <[email protected]> wrote: >> > Hi Markus, >> > >> > Thanks for the reply. In fact a vector-based should solve this. >> > But, unfortulatelly, as I am working with a very large raster map >> > (48,000 x 60,000 pixels; 250,000 clumps), and GRASS fail when >> > I try r.to.vect under Windows/Vista. Is there any other options >> > of convert large raster maps to vector, instead of r.to.vect? >> > >> No, but you could try a recent version of GRASS 7 and after starting >> GRASS, set at the commandline >> >> export GRASS_VECTOR_LOWMEM=1 >> >> then try r.to.vect >> >> It will take some time, but it should finish eventually. >> >> Markus M >> >> > >> > Markus Metz: >> >> >> >> Milton Cezar Ribeiro: >> >> > Dear all, >> >> > >> >> > I have a raster map where each patch (i.e. forest fragment) have >> >> > different >> >> > ID. >> >> > I need to estimate the perimeter per patch, but R.le.patch can't do >> >> > the >> >> > job. >> >> >> >> Have you tried a vector approach? Then the perimeter can be simply >> >> uploaded with >> >> v.to.db option=perimeter. >> >> >> >> (Watch out for the fractal problem, both r.le.patch and v.to.db) >> >> >> >> Markus M >> >> >> >> > ------------ >> >> > GRASS 6.4> r.le.patch map=fragments sam=w per=p1 siz=s1 out=STATS.txt >> >> > >> >> > PARAMETER CHOICES: >> >> > MAP: fragments >> >> > SAMPLE: whole map TRACING: 8 neighbor >> >> > SIZE MEASURES: >> >> > mean patch size >> >> > PERIMETER MEASURES: >> >> > sum of perims >> >> > >> >> > R.LE.PATCH IS WORKING....; >> >> > >> >> > ERROR: G_calloc: unable to allocate 24806 * 8 bytes at >> >> > alloc_cell.c:83 >> >> > ------------ >> >> > >> >> > Any hint? >> >> > >> >> > bests >> >> > >> >> > milton >> >> > >> >> > _______________________________________________ >> >> > 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
