1,736 reputation
25
bio website osm2po.de
location Hamburg, Germany
age
visits member for 1 years, 9 months
seen Mar 16 at 9:49

Mar
16
revised Faster routing algorithm on pgrouting
added 212 characters in body
Mar
14
comment pgRouting 2.0 slow execution of A star algorithm
looks like a heuristic based on the Manhattan-Distance. If not, the data must be projected somewhere before. Nevertheless, I would have expected a distance calculation. Some Euklidian function or sth. like that.
Mar
10
comment Osm2po : Querying generated table to get the closet line from a point
Do you use an index for geom_way? Have a look into the created sql-file (last line). There you will find sth. like this here: -- CREATE INDEX idx_hh_2po_4pgr_geom_way ON hh_2po_4pgr USING GIST (geom_way GIST_GEOMETRY_OPS); And it's a good idea to use a bounding-box around your points. Nevertheless this question rather belongs to the postGIS area.
Mar
8
answered Faster routing algorithm on pgrouting
Feb
26
answered osm2po: access values of maxweight tag
Feb
19
revised null pointer Exception in osm2Po
deleted 1 characters in body
Feb
19
comment pgRouting 2.0 slow execution of A star algorithm
The heuristic looks very strange.
Feb
19
answered null pointer Exception in osm2Po
Feb
10
comment pgRouting 2.0 slow execution of A star algorithm
Are you sure that (|dx|+|dy|)/2 is the heuristic? This seems strange. What are dx, dy? The heuristic must be added somewhere to the costs before inserted into the PQ.
Feb
5
comment How to configure osm2po to use the specified maxCost in TspDefaultMatrix
well, "never" is only an assumtion. Would rather say in 99,9% of all cases.
Feb
5
comment How to configure osm2po to use the specified maxCost in TspDefaultMatrix
There is no rule. It just bases on the assumption that reverse paths have nearly the same costs as their forward ones. And of course on that the longest path between two abitrary points is never part of an optimal solution.
Feb
5
comment How to configure osm2po to use the specified maxCost in TspDefaultMatrix
It's closed source (freeware) but you can use it for commercial applications.
Feb
5
comment How to configure osm2po to use the specified maxCost in TspDefaultMatrix
one very important question: do you get different results now?
Feb
5
answered How to configure osm2po to use the specified maxCost in TspDefaultMatrix
Dec
29
awarded  Tenacious
Dec
20
comment Graph.traverse() maximum targetIds?
If you want to calculate the fastest path but need the length, just pass the resulting path (=Array of EdgeIdx) to graph.calcPathLength(int[] path)
Dec
20
comment Graph.traverse() maximum targetIds?
costs is a general term. It can be calculated or fixed. By default osm2po lets you choose between length or time. In order to populate the costs with lengths, use the property-parameter "findShortestPath"="true"
Dec
19
revised Graph.traverse() maximum targetIds?
edited body
Dec
19
comment How can I use osm2po to calculate distance matrix in Km?
See also: gis.stackexchange.com/questions/80994/…
Dec
19
revised Graph.traverse() maximum targetIds?
added 9 characters in body