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28 views

Can driving_distance return all sets of distance from different starting points at one time?

I'm now using the extension of pgRouting, driving_distance, to search for the distance along the river system: In the figure, the starting point is 3, but I want to get the distance starting from ...
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37 views

driving_distance does not return all sets of distance

As title, I am working with pgRouting, trying to get the distance matrix along the river system. I use driving_distance function and it seems like I am getting what I want: But when I check the ...
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1answer
60 views

pgRouting:routing problems using reverse_cost

I saw this post:Routing issues with pgrouting, and try the ability of reverse_cost. As the result of this post, if there is only one way to go from one node to another, even though the reverse_cost ...
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1answer
91 views

Can pgRouting work more efficiently?

I use a river network on which has a lot of nodes to test pgRouting, and I run the SQL, searching for the shortest path between nodes. SELECT * FROM shortest_path(' SELECT gid as id, ...
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1answer
113 views

pgRouting:how to use reverse_cost?

I add a new column, naming it "reverse_cost", and give it the same data in the shape_leng column. But as I run the shortest path algorithm in pgadmin, I got an error message. here's my sql code ...