[GRASS-user] problem with v.patch

[lami at faunalia.it]

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?

Thanks again
leonardo

>
>
> Leonardo Lami wrote:
>>
>> Hi all,
>> I seen a bug in v.patch. If  I use two or more simple vectors it works
>> well but if I use I see big problem in the topology of the output. This
>> in 6.2.1 and in 6.3 version.
>> I add a link to a dataset with 2 vectors to make testing.
>>
>> www.faunalia.it/download/vpatch.tar.gz
>>
>> Thank you
>> Leonardo
>>
>
> Leo,
>
> the v.patch manual states
>  "Any vectors that are duplicated among the maps being patched together
>  (e.g., border lines) will have to be edited or removed after v.patch is
> run.
>  Such editing can be done automatically using v.clean
> (tool=snap,break,rmdupl).
>  "
>
> Did you run v.clean?
>
> Markus
> --
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