[GRASSLIST:2054] Re: editing raster polygon

[Helmer Schack-Kirchner]

Convert the digitized polygon areas to raster and use r.mapcalc.
correctedpolygon= if(areastoremove,NULL(),uncorrectedpolygon)

(Please refer the r.mapcalc manual for the syntax)

Helmer

Richard Greenwood wrote:

> I have a complex raster polygon that I use as a mask. I need to edit 
> the polygon. Specifically, I need to remove some areas of the polygon.
>
> I have used r.digit to digitize the areas that I would like to remove, 
> but I can not seem to see what to do next.
>
> Thanks.
>
>
> Richard W. Greenwood, PLS
> Greenwood Mapping, Inc.
> Rich <at> GreenwoodMap <dot> com
> (307) 733-0203
> http://www.GreenwoodMap.com


-- 
Dr.Helmer Schack-Kirchner
Institut für Bodenkunde und Waldernährungslehre
Albert-Ludwigs-Universität
79085 Freiburg / Germany
Tel. xx761 203 3612
Fax. xx761 203 3618