[GRASS-user] problem with v.patch
Maciej Sieczka
tutey at o2.pl
Mon Jun 25 14:13:07 EDT 2007
lami at faunalia.it wrote:
> Hi all,
> I tried to use v.clean with the follow tools: snap,break and rmdupl but
> the result is only a little better:
>
> Topology was built.
> Number of nodes : 1323
> Number of primitives: 1657
> Number of points : 0
> Number of lines : 0
> Number of boundaries: 1188
> Number of centroids : 469
> Number of areas : 468
> Number of isles : 138
> Number of incorrect boundaries : 77
> Number of centroids outside area : 3
> Number of areas without centroid : 2
>
> And if I increase the thresh (default=0) for rmdupl the result get worse.
> Is the only solution to edit it?
Well yes. And it's no bug in v.patch. If the 2 vectors are not
compatible in terms of geometry, v.patch is not any guilty that
patching them produces a non-topological vector.
Maciek
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