[GRASS-user] identify features without cat [solved]

[Dylan Beaudette]

On Sunday 07 October 2007, Martin Landa wrote:
> Hi Dylan,
>
> 2007/10/8, Dylan Beaudette <dylan.beaudette at gmail.com>:
> > After some frustration with the GRASS-R functionality as implemented
> > via temp shapefiles, I realized that the source of the problem was
> > features missing cat values.
> >
> > I poked around with v.edit, but did not see any simple way to ID or
> > remove features missing a cat value. The '-c' option in v.out.ogr was
> > a temporary fix, but I would like to be able to identify / remove
> > cat-less features without using v.out.ogr .
>
> to extract only features with category number using v.extract should
> work(?)
>
> v.extract in=r out=rc list=1-9999
>
> or
>
> v.edit map=r cats=1-9999 tool=select
>
> resp.
>
> v.edit map=r cats=1-9999 tool=select -r
>
> Martin

Thanks Martin. It turned out that the problem was associated with missing 
centroids, and the v.extract list=1-999999 trick did not work... 

Dylan


> > Any tips on how to do this / or where work would need to be done?
> >
> > Cheers,
> >
> > Dylan
> >
> > PS: working with GRASS6-CVS
> >
> > _______________________________________________
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> > grassuser at grass.itc.it
> > http://grass.itc.it/mailman/listinfo/grassuser



-- 
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341