[postgis-users] Shortest path around polygons

[tommy408]

I'm really new to PostGIS.  I need to solve this problem.  Find the shortest
path around polygons from point A to point B.  

Here is a better description:  http://alienryderflex.com/shortest_path/

How can I do it with PostGIS.  Or if you can give me some hints to narrow my
search.

Thank you.
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