On Mon, Sep 19, 2016 at 6:41 PM, Antonello Lobianco <[email protected]> wrote: > Let's say in grass I have a raster layer "regionId" and a raster layer > "forestArea". > > In the regionId I have stored the ids of the regions, in the forestArea I > stored the square km of forest within the pixel. > > How can I print a table summing up the forest area by region, that is the > sum of the values of a layer aggregated ("group by") by a second layer ?
Please take a look at https://grasswiki.osgeo.org/wiki/Zonal_statistics There are several options. Best Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
