[Qgis-user] CenterLines fom a Polygon?
Andreas Neumann
a.neumann at carto.net
Tue Mar 17 09:14:51 PDT 2015
Hi Mike,
No - QGIS does not have such functionality, and I also think that GRASS
does not have such an algorithm. If you have a fairly new Postgis, you
may want to try ST_StraightSkeleton(geometry) - see
http://postgis.net/docs/ST_StraightSkeleton.html - which uses CGAL.
Seems like OpenJump has a module to do skeletonization (google for
skeletonizer).
Here is also an interesting article on the topic:
http://ageoguy.blogspot.fi/2010/12/squelettisation.html
Neither one is totally easy and straightforward.
Andreas
On 17.03.2015 16:51, Elstermann, Mike wrote:
>
> Is in QGIS or in a plugin a function to create centerlines in polygons
> like http://www.ian-ko.com/ET_GeoWizards/UserGuide/createCenterlines.htm?
>
> mikeE.
>
>
>
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> Qgis-user at lists.osgeo.org
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