Surface is already taken into account for bicycles in the OSRM main repo:
https://github.com/DennisOSRM/Project-OSRM/blob/master/profiles/bicycle.lua However, instead of multiplying, I found it more realistic to simply use the surface speed, instead of multiplying: surface_speeds = { ["asphalt"] = default_speed, ["cobblestone:flattened"] = 10, ["paving_stones"] = 10, ["compacted"] = 10, ["cobblestone"] = 6, ["unpaved"] = 6, ["fine_gravel"] = 6, ["gravel"] = 6, ["fine_gravel"] = 6, ["pebbelstone"] = 6, ["ground"] = 6, ["dirt"] = 6, ["earth"] = 6, ["grass"] = 6, ["mud"] = 3, ["sand"] = 3 } -- surfaces if surface then surface_speed = surface_speeds[surface] if surface_speed then if way.speed > 0 then way.speed = surface_speed end if way.backward_speed > 0 then way.backward_speed = surface_speed end end end Both approaches might have merit. Kind regards, Emil Tin IT- and Process Specialist Traffic Design ________________________________ CITY OF COPENHAGEN The Technical and Environmental Administration Traffic Department Islands Brygge 37 Vær. 118 Postboks 450 2300 København S Telefon +45 2369 5986 Email z...@tmf.kk.dk EAN 5798009493149 -----Oprindelig meddelelse----- Fra: Hans Gregers Petersen [mailto:greg...@septima.dk] Sendt: 28. februar 2014 09:16 Til: osrm-talk@openstreetmap.org Emne: Re: [OSRM-talk] Beginner question: default car profile and tracktype/smoothness/surface Hi Fernando, > I've always wondered if there are any plans taking surface > type/quality into account in the default profiles. I live in a > developing country (Brazil) with poorly maintained roads and these > conditions make a big difference at the beginning and at the end of > many routes if ignored. I do not know about the plans regarding the default profile, but I successfully used a simple "factor approach" to surfaces when doing our routing on bicycle paths here in Denmark. For instance setting the following in the LUA profile: -- How much does speed depreciate by surface surface_factors = { ["unpaved"] = 0.8, ["gravel"] = 0.8, ["cobblestone"] = 0.8, ["dirt"] = 0.8, ["earth"] = 0.8, ["sand"] = 0.8, ["cobblestone:flattened"] = 0.9, ["compacted"] = 0.9, ["fine_gravel"] = 0.9, ["wood"] = 0.9 } and then later adjuste the speed accordingly: -- Surface tag local surfacetag = way.tags:Find("surface") -- Surface factor if surface_factors[surfacetag] then way.speed = way.speed * surface_factors[surfacetag] way.backward_speed = way.backward_speed * surface_factors[surfacetag] end Best regards, Greg Hans Gregers Petersen Partner, Senior Consultant www.septima.dk _______________________________________________ OSRM-talk mailing list OSRM-talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/osrm-talk _______________________________________________ OSRM-talk mailing list OSRM-talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/osrm-talk
