how about, v.rast.stats with number/sum option and then field calculations? regards, sotiris
On 02/11/2015 01:15 PM, Margherita Di Leo wrote: > Hi, > > I have to calculate the percentage of given class of a raster within the > polygons given in a vector (a regular grid). Since I'm dealing with large > files and operations repeated in a chain, i should be focusing on what is > the optimal (fastest) option to do that. I could vectorize the raster and > use v.overlay and v.to.db, or using v.rast.stats i can count out the number > of cells (should i use number for that or sum?) and then divide per area > of the grid. Any better idea? > > Thank you in advance > > > > _______________________________________________ > 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
