Dear GRASS developers, I would like to apply for write access to the GRASS-Addons-SVN repository.
I was looking for a faster v.rast.stats implementation to calculate univariate statistics based on vector polygons, because I need to do this for large raster maps and the current v.rast.stats is just too slow. In the GRASS-Addons-SVN repository I found r.univar.zonal [1] from Markus Metz, so I adapted the script v.rast.stats to use r.univar.zonal. The result v.rast.stats2 is a lot faster. See test with spearfish below: # current v.rast.stats time v.rast.stats -c -e vector=fields raster=elevation.10m col=elev real 2m6.139s user 2m1.616s sys 0m4.464s # v.rast.stats2 based on r.univar.zonal time v.rast.stats_neu -c -e vector=fields raster=elevation.10m col=elev real 0m3.249s user 0m2.784s sys 0m0.444s [1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.univar.zonal I would be happy, if the script v.rast.stats2 and r.univar.zonal from Markus Metz would finally, after an incubation phase, make it into the sources for GRASS future versions. thanks a lot Otto _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
