From some months I have been solving a problem but I cannot finish. My question is, "How can I extract a road centreline from delaunay triangulation using open-source QGIS?" Actually, I am using Chugiak.
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Can you give some more detail about the relationship between your Delaunay triangulation, and the road centerlines? – Erica Oct 01 '14 at 14:52
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are you referring to the problem described in http://gis.stackexchange.com/questions/29863/creating-centrelines-from-road-polygons-casings? – underdark Oct 01 '14 at 15:03