[Qgis-user] Running v.clean on a QGIS vector layer (Polygon) through Sextante

[Paolo Cavallini]

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Il 30/04/2013 22:41, SBL ha scritto:

> The one is, that if you for example run v.clean through Sextante on a
> polygon layer containing polygons with overlapping areas, the overlapp
> errors are (silently) cleaned during import and therefore not written to the
> final error-output-layer in v.clean...

Same for v.in.* : overlapped areas are level2 polygons in grass, removed during export.

> The other is, that one single tool of v.clean often (usually?) is not enough
> to really clean topological errors (in polygon layers) sufficiant. So,
> beeing able to run a squence of v.clean-tools (like in GRASS) would be a
> performance improvement for advanced topology cleaning I suppose, especially
> when working with bigger datasets...

Trivial to do: just chain several v.clena modules in a sextante model.
All the best.
- -- 
Paolo Cavallini - Faunalia
www.faunalia.eu
Full contact details at www.faunalia.eu/pc
Nuovi corsi QGIS e PostGIS: http://www.faunalia.it/calendario
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