[Cartoweb-users] Pgdijkstra Directed Map

[Aileen Baylon]

Thanks Sylvain for yor quick reply.

1. What I meant by the directed route is the roads being one-way or two way
or the roads being major roads or minor roads. How do return a postgis path?
Currently I'm using the shortest_path_as_geometry() function but I read in 
the readme
that I can pass to the shortest_path function if the road is directed or not 
(true/false)

2. How do I tell my query that I already have a "distance" column in my 
table?
How does pgDijkstra compute the shortest path using the distance?

3. So if I have existing source_id & target_id in my table, I do not need to 
call the
assign_vertex_id function right? But I should still call the 
create_graph_tables? This is
what I did but if I don't use the assign_vertex_id function before the 
create_graph_tables function I
get an error. :(

Much help will be appreciated.

Regards,
Aileen




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