[Qgis-developer] Make valid in master
aperi2007 at gmail.com
Wed Jan 15 23:39:00 PST 2014
It should be applied only when the test IsValid fail.
This should limit the slowness.
Also pay attention that something the result of a MakeValid on an Invalid
poligon could be a MultiPolygon or also a Collection.
So to use it in an automatic manner need to apply also a
To be sure that it is always a geometry of the same kind.
2014/1/16 Larry Shaffer <larrys at dakotacarto.com>
> Hi Paolo,
> On Wed, Jan 15, 2014 at 11:35 PM, Paolo Cavallini <cavallini at faunalia.it>wrote:
>> Hi all.
>> To the best of my knowledge, our make clean command, available through
>> the Processing subplugin:
>> is the most effective method to clean up invalid geometries.
>> I would therefore suggest to include it in master, in order to have it
>> available straight away for everybody.
>> This depends on lwgeom, available at least on Debian and Windows.
> I have recently made a Homebrew formula for Mac that allows liblwgeom to
> be built without Postgres/PostGIS installs (a bit of a hack, actually). So,
> the standalone lib is now readily available on Mac OS X as well .
> +1 for this to be included in QgsGeometry or similar class.
> It would help solve labeling issues where the extents-clipped geometry is
> invalid. Would slow rendering down, of course, but would be good to have as
> an option for faster machines and print jobs. Note: the validity fix would
> be applied to the duplicates of feature geometries, which are used by PAL.
>> Opinions? Any blockers?
>> All the best.
>> Paolo Cavallini - www.faunalia.eu
>> QGIS & PostGIS courses: http://www.faunalia.eu/training.html
>> Qgis-developer mailing list
>> Qgis-developer at lists.osgeo.org
> Qgis-developer mailing list
> Qgis-developer at lists.osgeo.org
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