[GRASS-user] RE : RE : Merge polygone with same attribut of a shapefile

Vincent Bain bain at toraval.fr
Thu May 16 22:26:22 PDT 2013

Le jeudi 16 mai 2013 à 23:38 +0300, Nikos Alexandris a écrit :
> Funny, I am "stuck" as on how to (re-)define in layer 2 the "cat"
> column with 
> unique categories for each (internal) feature id.  There is nothing
> that 
> helps-out towards this (simple?) task in the manuals (v.to.db). 

this should do the job:
v.category op=add layer=2 type=centroid
v.to.db type=centroid option=cat


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