I have a table say street_table which contains information about street such as gid, street_name, the_geom, source_id, target_id, and edge_id, traffic_direction, low_number, high_number Using procedure as illustrated in the pgdijkstra documentation, I generate street_table_edges, and street_table_vertices. The street_table_edges has id, source, target, cost, reverse_cost. The street_table_vertices has id, and geom_id. 1. Based on the content of traffic_direction (a = both direction, b = one direction from high_number to low_number, c = one direction from low_number to high_number), I would like to alter the cost in street_table_edges to a large number to prevent a one way direction street from being used in shortest path calculation. example For a segment A to B with traffic direction 'c' should have only normal cost associated from A => B but from a prohibitive cost from B => A. 2. What is the relation between source_id, target_id of street_table to source and target of street_table_edges. How can I use source_id, and target_id to access corresponding vertices in street_table_vertices. Thanks in advance! - Hassan adekoya _______________________________________________ Cartoweb-users mailing list Cartoweb-users@lists.maptools.org http://lists.maptools.org/mailman/listinfo/cartoweb-users
