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 > > > > > -- > View this message in context: > http://osgeo-org.1803224.n2.nabble.com/How-to-extract-z-coordiante-and-write-it-into-attribute-table-tp6199821p6200570.html > Sent from the Grass - Users mailing list archive at Nabble.com. > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
