Skeletonize vectors in QGIS/Python

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I am trying to find a tool to create a skeleton of a large vector dataset using QGIS and its bundle. It should be directly programmatically callable through Python or commandline (QGIS, GRASS, OGR etc. are all okay).

The target is a large thin polygon with holes representing street areas and I need to obtain an approximation of the road network via skeletonization.

What I found so far:

• GRASS 7.0 has v.skeleton which should be good enough but does not seem to be in for integration with QGIS in the near future.
• CGAL has skeletonize algorithms, of course, but the Python support is very poor.
• pySkeleton does not work for me and I probably don't have time to salvage the code.

Other alternatives (openJump skeletonizer, this old ArcGIS plugin...) cannot be easily plugged into QGIS/Python.

Any other suggestions?

Thanks, Jan



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