113 reputation
4
bio website
location Groningen, Netherlands
age 40
visits member for 1 year, 3 months
seen Feb 3 at 7:28

May
17
comment How do I add elevation data to a GeoJSON line from a GPX file?
The map shows a flat view, seen from the top, so how will elevation change the line?
Feb
10
comment How to encode shapefiles from LATIN1 to UTF-8?
Got it to work in Windows, have updated the answer.
Jan
23
comment How can I assign road names from OSM to gis linestrings using open source tools?
These people discuss the idea of matching each individual point on the linestring to the road it is on.
Jan
16
comment Why is pgrouting astar not consistent?
I can imagine that in RDNEW you lose quite a couple digits of precision when computing the heuristic's |x1-x2| and |y1-y2|. But you report that switching to double precision does not help either. The fact that switching to ::integer helps does not make it right, I think. It probably just makes the heuristic near zero which in turn makes you effectively run Dijkstra's algorithm.
Jan
15
comment Why is pgrouting astar not consistent?
Astar will always keep testing nodes until the heuristic says the current best solution can no longer be improved upon.
Jan
15
comment Why is pgrouting astar not consistent?
It is an [admissible heuristic] (en.wikipedia.org/wiki/Admissible_heuristic) so this cannot be the cause.