Le lundi 16 janvier 2006 à 14:05 -0500, Fay Du a écrit : > > > -- What I trying to see is, if I set directed=ture, if there is a > segment S, which start point is A, end point is true, can a shortest > pass goes from point B to A when it passes Segment S? Do I have to > physical set Segment S start point to point B, and end point to A? ie. > > When I use following select command: > Select astext(the_geom) from graphy where id=Sid; > In return "MULTILINESTRING", the first point has to be Point B's > coordinate, and last point has to be A's coordinate? > > If it is not necessary, how program know from Point B to A is allowed > and Point A to B is not allowed? > > Hope I explain myself clearly this time. > Fay >
Pgdijsktra does not use geometry. Geometries are only used for instance with the assign_vertex_id() and shortest_path_as_geometry() functions. Is your issue related to the use of one of these functions ? _______________________________________________ Cartoweb-users mailing list [email protected] http://lists.maptools.org/mailman/listinfo/cartoweb-users
