A while back I looked at generating alphashapes using pgRouting and displaying in QGIS. It was a pretty convoluted hack though and my SQL skills need some honing. After seeing a post by smathermather that generated isochrones using PostgreSQL functions and the pgRouting algorithms I thought there must be a
This document and repository explains how to load Ordnance Survey ITN GML into a PostGIS database with Loader and then build a network suitable for use with pgRouting. The network will have one way streets, no entry and no turn restrictions, mandatory turns and grade separations for over- and underpasses.