[GRASS-user] Fwd: Re: remove small islands from vector areas

[Markus Metz]

On Fri, Jun 21, 2019 at 2:19 PM Stefan Blumentrath <
Stefan.Blumentrath at nina.no> wrote:
>
> Ah, OK. Got that wrong, sorry.
>
> I don`t think holes have an area (but I may be wrong)....
> So you might have to add a centroid first?
> https://grass.osgeo.org/grass76/manuals/v.centroids.html

No, v.clean tool=rmarea also removes holes inside areas, at least it
should. It would be a bug if holes smaller than threshold are not removed.

Markus M
>
> Cheers
> Stefan
>
> -----Original Message-----
> From: grass-user <grass-user-bounces at lists.osgeo.org> On Behalf Of Robert
Nuske
> Sent: fredag 21. juni 2019 13:49
> To: grass-user <grass-user at lists.osgeo.org>
> Subject: [GRASS-user] Fwd: Re: remove small islands from vector areas
>
>
>
>
> -------- Weitergeleitete Nachricht --------
> Betreff: Re: [GRASS-user] remove small islands from vector areas
> Datum: Fri, 21 Jun 2019 13:47:52 +0200
> Von: Robert Nuske <rsn.mailinglists at gmail.com>
> An: Stefan Blumentrath <Stefan.Blumentrath at nina.no>
>
> Hi Stefan,
>
> as far as I understood does rmarea that remove small areas but not
islands (holes) within areas. At least i didn't find a way to remove
islands with v.clean.
>
> thanks
>    robert
>
> Am 21.06.19 um 13:06 schrieb Stefan Blumentrath:
> > Hi Robert,
> >
> > Did you have a look at v.clean:
> > https://grass.osgeo.org/grass77/manuals/v.clean.html
> > with
> > tool=rmarea >
> >
> > Cheers
> > Stefan
> >
> > -----Original Message-----
> > From: grass-user <grass-user-bounces at lists.osgeo.org> On Behalf Of
> > Robert Nuske
> > Sent: fredag 21. juni 2019 12:33
> > To: grass-user <grass-user at lists.osgeo.org>
> > Subject: [GRASS-user] remove small islands from vector areas
> >
> > Dear Listers,
> >
> > sorry, it's me again.
> >
> > I want to remove islands smaller than a certain threshold from my
vector map or if that is not possible all islands.
> >
> > I found some trick on an old manual page of v.extract. But this does
not work anymore. Is there a new trick?
> >
> >
> > thnaks
> >    robert
> > _______________________________________________
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> > https://lists.osgeo.org/mailman/listinfo/grass-user
> >
>
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