Hi Armin, that is possible and you would need to decrease the weight of a certain edge if this edge is part of a bike route relation. For that you'll need to tell the flag encoder to store this info e.g. in the flags and fetch it in a custom Weighting. See eg. how to create a custom weighting <https://github.com/graphhopper/graphhopper/blob/master/docs/core/weighting.md> and e.g. encoder.setSpeed on how to store information in the flags.
Regards, Peter On 25.08.2015 15:46, XCTrails wrote: > Hi, > > what is the default weighting approach for bicycle routing? A user has > recently pointed out that in a certain case he gets routed via main > roads while there are available bike trails. Case in point is from Bad > Aibling to Bad Feilnbach - GH's bicycle routing is basically the > faster/shorter connection, while http://cycle.travel/map for instance > finds the "proper" bicycle connection (i.e. the one I'd actually prefer) > > What is the best way to influence this in GH? Implement a custom > weighting? https://github.com/graphhopper/graphhopper/issues/190 seems > to indicate that this should somehow be possible, but I'm not reading > much out of that ticket which gives me further clues... > > (I do understand that there is a threshold issue, i.e. how far is one > willing to detour in order to avoid highways for instance...) > > Thanks for any further hints or pointers... > > cheers, > Armin > > > > _______________________________________________ > GraphHopper mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/graphhopper
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