I have a road network where I do a driving distance operation through pgrouting. This is my SQL:
SELECT * FROM driving_distance('SELECT gid AS id,source,target, cost FROM elveg',676663,1000,false,false);
From this query I get a strange result: http://bildr.no/view/1373984
Black is my road network and green is the result from the above query. From the image you see that some edges are not included(not green) while edges which can only be connected through this not included edge in fact is included?
How can this be? Am I doing something totally wrong here?