[GRASSLIST:3035] Re: v.extract without centroids
blazek at itc.it
Fri Mar 26 08:29:27 EST 2004
On Friday 26 March 2004 13:47, Otto Dassau wrote:
> Radim Blazek schrieb:
> > On Thursday 25 March 2004 13:36, Otto Dassau wrote:
> > > Dear list,
> > >
> > > I have two questions:
> > >
> > > 1) I imported an area shape with 6000 polygons in g57 and
> > > there are 2 centroids missing. How can I find these two
> > > centroids?
> > I believe that those 2 areas without centroids are slivers between
> > shape polygons.
> > > 2) I used v.extract on this shape (with the 2 missing centroids).
> > > v.extract in=SHAPE out=SHAPE2 type=area where='AREAQM>1'.
> > Try type=area,centroid. This is not correct and it should be fixed,
> > type=area must export also centroids.
> Hi Radim,
> thank you for your hint:
> I used:
> v.extract in=SHAPE out=SHAPE2 type=area,centroid where='AREAQM>1'.
> it exports areas _and_ the centroids, but now _all_ areas,
> although I just want to export areas > 1 with centroid.
> Number of nodes : 6765
> Number of primitives: 7692
> Number of points : 0
> Number of lines : 0
> Number of boundaries: 7529
> Number of centroids : 163
> Number of areas : 2300 -> should be 163 !
> Number of isles : 1373
> Number of areas without centroid : 2137
> What can be done to solve this?
No idea, for me it works.
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