[GRASS-user] Tips on how to delete areas with no categories?

Richard Chirgwin rchirgwin at ozemail.com.au
Tue Feb 10 17:41:22 EST 2009


> Message: 2
> Date: Tue, 10 Feb 2009 11:40:15 -0800
> From: "Moskovitz, Bob" <Bob.Moskovitz at conservation.ca.gov>
> Subject: [GRASS-user] Tips on how to delete areas with no categories?
> To: "Grass-User (E-mail)" <grass-user at lists.osgeo.org>
> Message-ID:
> 	<A73B6E7A4503E948826CE81A65AF5FECA2A54E at docexs1.ad.consrv.ca.gov>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello Grass-Users,
>  
> After using r.to.vect, I have areas with no categories.  These areas appear to be holes.  This is what the map look like with info from v.what:  http://bobdebm.googlepages.com/example_area.png/example_area-full;init:.png
>  
> How do I remove these areas?
>  
> Thanks in advance.
>  
> Bob
>  
>
> Bob Moskovitz 
> Research Analyst I 
> Seismic Hazard Zonation Project
> California Geological Survey 
> http://www.conservation.ca.gov/cgs/shzp<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
>   
Bob,

What if you use v.category to attach cats to the empty areas, and then
use v.edit to delete the appropriate category range?

Cheers,
RC


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