[GRASSLIST:4083] Re: vectorizing rasters

[Kirk R. Wythers]

On Aug 3, 2004, at 1:05 AM, Hamish wrote:
> v.trim was disabled apparently because it was buggy. If you compiled  
> from
> source code, you can always compile the individual module with:
>
> cd src/mapdev/v.trim
> gmake53
>
> .. see
> http://freegis.org/cgi-bin/viewcvs.cgi/*checkout*/grass/src/mapdev/ 
> v.trim/BUGS
>
>
>
> instead try:
>
> [GRASS 5.3]
> v.rm.dangles
>
>
> [GRASS 5.7]
> v.clean tool=rmdangle thresh=
>      or tool=chdangle  + v.extract
>      or tool=rmarea  (or v.extract -d)
>

Thanks for the tip Hamish. I also found that r.neighbors with  
method=mode and size=3, does a wonderful job of cleaning out artifact  
cells. I think once I get v.rm.dangles fine tuned, I'll be in business.

>
>
> Hamish
>
Kirk R. Wythers	
Dept. of Forest Resources
University of Minnesota
email: kwythers at umn.edu
tel: 612.625.2261
fax: 612.625.5212