[GRASS-user] v.category report cats

Johannes Radinger johannesradinger at gmail.com
Wed Sep 12 08:52:35 PDT 2018

Thanks for your quick answer, Moritz!
I filed a ticket for this (https://trac.osgeo.org/grass/ticket/3643)


On Wed, Sep 12, 2018 at 2:58 PM Moritz Lennert <mlennert at club.worldonline.be>

> On 12/09/18 14:40, Johannes Radinger wrote:
> > Hi all, I was wondering about the report output of 'v.category
> > option=report'. This output contains a column for each layer that is
> > called 'count'. Does this 'count' refer to the number of vector
> > objects or the number of unique category numbers in that layer (I
> > guess it is the first)? This might differ if two objects share the
> > same category. I think both would be useful, however which one is
> > provided here? Maybe this could be added to the manual, as one could
> > assume that 'count' refers to categories numbers?!
> The first examples in the man page do implicitely give the answer, i.e.
> that it is feature count, not unique category numbers count. Actually,
> you cannot get this latter information from v.category op=report. AFAIK,
> you would have to do something like this (in *nix):
> v.category YourMap op=print | sort -n | uniq | wc -l
> But I agree that the count info is not clearly defined in the man page.
> Please file a ticket for this, so we don't forget.
> Moritz
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