351 reputation
414
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location Berlin, Germany
age 45
visits member for 2 years, 6 months
seen 3 hours ago

Author of the fast and flexible open source route planner GraphHopper. Try it out here


Jan
23
comment Algorithm to scan a road network geometry using directions service
That was the reason I was suggesting GraphHopper and OpenStreetMap
Jan
21
comment Algorithm to scan a road network geometry using directions service
But this 'discovery' is easily done when you traverse the graph around one location. But probably I do not really understand your problem (?)
Jan
21
comment Algorithm to scan a road network geometry using directions service
Instead of a remote Directions Service you could traverse the network in your boundary via an offline solution like GraphHopper (warning: I'm the author) and fetch the network topology as well as the geometry
Jan
14
comment What can I use to calculate drive times /with/ traffic considered?
If you have the traffic data for your area you can use several tools from openstreetmap
Jan
12
comment How to find a route given a set of noisy points
I've now also implemented this idea in a rough prototype: github.com/karussell/map-matching
Jan
12
answered real time map matching
Jan
12
answered Algorithms for matching segments
Jan
12
revised Different approaches for map matching : links / ideas?
added 34 characters in body
Dec
15
comment Routing ensuring all areas are touched
You can just create an issue, not sure if I can follow here :)
Dec
11
comment Fast Offline OSM Routing Library to Replace MoNav (.NET)
You could try GraphHopper with iKVM
Dec
11
answered Routing ensuring all areas are touched
Nov
9
revised Alternatives to pgRouting
added 7 characters in body
Oct
28
comment How to use OSM xml extracts? Can I make an offline app in Android using OSM?
For large areas or high zoom level I doubt that image tiles will solve the problem for mobile offline usage
Oct
9
comment Leaflet - very basic, simple routing - OSM & Google Maps
If you know Java you could write a import procedure for GraphHopper using public transport from OSM
Oct
7
comment Grass, Route Finding with Elevation Limits
No idea about Grass. What you can do is use a Dijkstra e.g. with GraphHopper and write custom Java code to fit your requirements. Should not be that difficult if you know Java as elevation and the other stuff is already imported.
Oct
7
comment How to find a route given a set of noisy points
this is called map matching. have a look at my blog post: karussell.wordpress.com/2014/07/28/…
Sep
7
answered What Open Source Packages are available to provide routing
Sep
3
comment Creating drive time polygons using open source tools
It is kind of routing but "one to all" limited by time or distance
Sep
3
answered Creating drive time polygons using open source tools
Sep
3
comment Creating drive time polygons using open source tools
mapnificent is open source?