On Thu, 2009-02-26 at 13:01 +0100, FAROUX STEPHANIE wrote: > Moritz Lennert wrote: > > On 26/02/09 11:47, FAROUX STEPHANIE wrote: > >> Hello, > >> I see the function r.cats which allows to read categories of a raster > >> map, but how can i define these attributes? Should i pass by a vector > >> map? In the database menu, it doesn't seem possible to add a table > >> for a raster map. > > > > Raster maps have categories and labels. Categories have to be > > numerical, labels can be anything. Each pixel needs to have a category > > value (or NULL) and optionally you can have one (and only one) label > > per category value. > > > > BTW, r.cats is now replaced by r.category. > > > > If you want to link a cell with many attributes, you will have to use > > vector grids (v.mkgrid or r.to.vect as you suggestà). > > > > Moritz > > > Thank you. And how do you put labels on categories please?
Dear Stephanie, please have a look in the manual ( "g.manual r.category" ). The examples are very helpful. Kind regards, Nikos _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
