Clip with Poly

[Michael Schulz]

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 at 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 at fh-nuertingen.de
> Phone: +49 (0) 7022 404 Ext. 192 or Ext. 152
> Fax: +49 (0) 7022 404 Ext. 166                      
>