Am 21.06.19 um 21:27 schrieb Ken Mankoff:
On 2019-06-21 at 21:10 +02, Robert Nuske wrote...
If there is no way to only treat the islands/holes (which i don't know
about), it will change the outer boundary as well. Fjord like
structures will vanish. Neighboring areas might even merge if close
On 2019-06-21 at 21:10 +02, Robert Nuske wrote...
> If there is no way to only treat the islands/holes (which i don't know
> about), it will change the outer boundary as well. Fjord like
> structures will vanish. Neighboring areas might even merge if close
> enough. And since one can not control
On Fri, Jun 21, 2019 at 2:19 PM Stefan Blumentrath <
stefan.blumentr...@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,
> 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?
Did you have a look at v.clean:
On 2019-06-20 at 09:37 +02, Moritz Lennert
wrote...
> Just a rapid, wild guess here, but would it be feasible to just
> vectorize the three separately and then create the link afterwards
> using v.distance ?
This may work. An alternate method is if I do this through the Python GRASS
On 21/06/2019 15:18, Stefan Blumentrath
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
Cheers
Stefan
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
Cheers
Stefan
-Original Message-
From: grass-user On Behalf Of Robert Nuske
Sent: fredag 21. juni
Weitergeleitete Nachricht
Betreff: Re: [GRASS-user] remove small islands from vector areas
Datum: Fri, 21 Jun 2019 13:47:52 +0200
Von: Robert Nuske
An: Stefan Blumentrath
Hi Stefan,
as far as I understood does rmarea that remove small areas but not
islands (holes) within
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 On Behalf Of Robert Nuske
Sent: fredag 21. juni 2019 12:33
To: grass-user
Subject: [GRASS-user] remove small islands from
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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