Hi, On 23.07.2013 09:22, Peter K wrote:
yesterday we released the first public version of our fast and Open Source routing engine called GraphHopper.
I'd like to understand better where this fits in between the purely A* gosmore and the CH-based osrm.
With osrm, it is difficult to have multiple routing profiles on one machine because you have do compile a routing graph for each profile - a world-wide setup for "car, bike, foot" would take something like 150 GB of memory on the server.
With gosmore, this is easy since you only need one routing graph to support a multitude of profiles - not only car, bike, foot, but also motorcycle, HGV, and others. This flexibility comes at a noticeable speed penalty.
I read that I can run GraphHopper with or without CH. Does that mean that when I run it without, I get the gosmore-like flexibility to evaluate edges at runtime, or is the speed profile baked into the routing graph (and therefore your demo server needs something like 64 GB of RAM because it has three routing graphs)?
Bye Frederik -- Frederik Ramm ## eMail [email protected] ## N49°00'09" E008°23'33" _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
