[pgrouting-users] TSP and how to contribute

[Emre Koc]

Sure

Here is my sql query for that image.

SELECT edges.gid, ST_AsText(edges.the_geom) AS geotext,
                 edges.ft_minutes,
 edges.meters
FROM edges,
(SELECT edge_id, cost FROM driving_distance('SELECT gid as id,
 source::integer,
 target::integer,
         meters::double precision as cost
 FROM edges', $startVertexID, $cost,false,false)
)  as rt
WHERE edges.gid=rt.edge_id;";

I just give a sample vertex id and a cost value in meters and got resulting
edges. Normally when I find shortest paths all roads are connected so the
graph is ok. But this driving directions does not output connected roads,
thats the thing I do not understand.

/emre


On Fri, Jan 14, 2011 at 5:26 AM, Daniel Kastl <daniel at georepublic.de> wrote:

>
>
>> I checked driving directions functionality and seems like the feature that
>> I was looking for. But It returns non connected edges which are close by a
>> cost. Do you know how does this function really work ? Here is my screenshot
>>  http://db.tt/0bb62XB. Shouldn't the output be connected ?
>>
>
> Could you tell us what you did exactly? The query for example.
>
> Daniel
>
>
> --
> Georepublic UG & Georepublic Japan
> eMail: daniel.kastl at georepublic.de
> Web: http://georepublic.de
>
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