[GRASS-user] Re: How to extract z-coordiante and write it into attribute table?

[Vincent Bain]

I would suggest there is something wong between your geometry and data
attached in your table. Did you try v.category in order to clean it up ?

http://grass.osgeo.org/grass64/manuals/html64_user/v.category.html



Le mercredi 23 mars 2011 à 07:59 -0700, TimNorwey a écrit :
> I tried to do this, but an error occurred, but I don´t really understand what
> it means (see below)
> 
> http://osgeo-org.1803224.n2.nabble.com/file/n6200570/error.png 
> 
> In my attribute table I have the tables x,y,z and cat ... all include just
> NULL-values.
> 
> Thanks,
> Tim
> 
> 
> 
> 
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