Hi, IbrahimB22 wrote: > I downloaded the osm file for Belgium, and then I converted it to a postgis > database using osm2pgsql.
This converts roads into linestrings and removes topology information, i.e. it becomes hard work to reverse-engineer a routing graph from that. Don't use osm2pgsql as a basis for routing. There's a tool called osm2pgrouting somewhere which you should try if you want to do pgrouting (unsure how current the tool is though), or build your own structure based on an "osmosis" data import. You will find that OSM stores roads not as typical GIS geometries but as a sequence of referenced nodes and calls this a "way". A way is basically an edge for your routing graph, note that you can remove those nodes from the graph that have only two neighbours. > All in all, I have to say, is that I'm really confused by this. Writing a thesis ought require a bit of dealing with confusing situations otherwise everybody would do it ;-) Bye Frederik _______________________________________________ Routing mailing list [email protected] http://lists.openstreetmap.org/listinfo/routing
