Clip with Poly

GRASS GRASS user
1

Dear all,
Is raster-clipping with a polygon like the Arc/Info command gridclip
possible?
I know the way to zoom, and then r.mapcalc to a new map, but I
need not a rectangle but a irregularly form for clipping.

Thanks

Dieter Lehmann
Dieter Lehmann
State University of applied Sciences
Schelmenwasen 4-8
D-72622 Nuertingen, Germany
lehmann@fh-nuertingen.de
Phone: +49 (0) 7022 404 Ext. 192 or Ext. 152
Fax: +49 (0) 7022 404 Ext. 166

2

Hello Dieter,

Create a raster-mask file (perhpaps via
digitizing an area, converting it into a raster file using v.to.rast) and
then use r.mapcalc and thereby delete all the raster information outside
the mask.

Hope this works !

Yours, Michael

==============================================================
Michael Schulz

Christoph-Mang-Str.5 Geologisches Institut
79100 Freiburg Universitaet Freiburg
                           Albertstr. 23b
                           79104 Freiburg

On Mon, 25 Jan 1999 lehmann@fh-nuertingen.de wrote:

Dear all,
Is raster-clipping with a polygon like the Arc/Info command gridclip
possible?
I know the way to zoom, and then r.mapcalc to a new map, but I
need not a rectangle but a irregularly form for clipping.

Thanks

Dieter Lehmann
Dieter Lehmann
State University of applied Sciences
Schelmenwasen 4-8
D-72622 Nuertingen, Germany
lehmann@fh-nuertingen.de
Phone: +49 (0) 7022 404 Ext. 192 or Ext. 152
Fax: +49 (0) 7022 404 Ext. 166