[GRASS-user] Spatial Dissolve

[Darren Cope]

Hi Markus,

I must be missing something, because this still does not seem to work.
 I found another (non-GRASS) way to accomplish this, so the priority
is not very high, but I'd still like to figure out the GRASS method.
Is the v.patch step in the CORINE example necessary, or mostly just
the v.clean step with rmdupl?

Cheers,

Darren

On 5/16/07, Markus Neteler <neteler at itc.it> wrote:
>
> Hi Darren,
>
> I also stumbled over this problem, but we solved it. The trick is that
> you first have to remove the duplicated tile boundaries, then dissolve
> works.
> See example for CORINE Landcover SHAPE files:
>  http://grass.itc.it/grass63/manuals/html63_user/v.dissolve.html
>
> Cheers
> Markus
>
>
> Darren Cope wrote:
> >
> > Hi all,
> >
> > I'm new to GRASS, and using it in Windows via QGIS.
> >
> > I am attempting to do a "spatial dissolve" (i.e. not dissolve on an
> > attribute, but rather just remove unnecessary tile boundaries) on a
> > file that I've imported to GRASS from a shapefile, and am so far
> > unsuccessful.  The file contains waterbodies, and some of them are cut
> > in pieces by tile boundaries.  I would like to remove these
> > boundaries.  Can someone please help me out?  I've tried combinations
> > of v.extract -d with no success, and am not sure how the "category"
> > value apply when I'm not dissolving on an attribute.
> >
> > So far my search of the archives has turned up something close, but
> > nothing that seems to fit my situation exactly.
> >
> > Cheers,
> >
> > Darren Cope
> > darrencope at gmail.com
> > http://dmcope.freeshell.org
> >
> > _______________________________________________
> > grassuser mailing list
> > grassuser at grass.itc.it
> > http://grass.itc.it/mailman/listinfo/grassuser
> >
> >
>
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>
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-- 
Darren Cope
darrencope at gmail.com
http://dmcope.freeshell.org