* Moritz Lennert <[email protected]> [2015-04-23 20:58:10 +0200]:
> On 23/04/15 16:44, Ahmet Temiz wrote: > > thank you Nikos > > > > I meant that creating buffers from a line, which also querying DEM values. > > > > DEM is in subquery position of buffer map > > You cannot do that directly, AFAIK, but using r.mapcalc you can combine > the two variables. Different paths are possible. Here's one (supposing a > buffer of 500m): > > - Create a raster map with distance to the line using r.grow.distance > - Use r.mapcalc in order to check for both distance and DEM value, e.g. > > NewMap = if(DEM > 100 && DEM < 200 && distance < 500, 1, null()) > > This will give you a map with non-null (value 1) in those pixels that > are within the buffer distance and that correspond to the DEM-related > condition. > > Is this what you are looking for ? > > Another path would be combining r.buffer output with the DEM in r.mapcalc. > > Moritz > [..] Dear Ahmet, did Moritz' suggested approach match your needs? Thank you, Nikos _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
