hi, I have it working https://github.com/FreemapSlovakia/freemap-routing/blob/master/oma-bus.lua (and train profile below)
michal On Mon, Apr 30, 2018 at 09:26:22AM -0700, Daniel Patterson wrote: > Hi Patrick, > > Nobody has written a "How to make a public transport profile" document > for OSRM, you'll have to piece it together from examples and reading code. > > That said, the "testbot" profile here: > https://github.com/Project-OSRM/osrm-backend/blob/master/profiles/testbot.lua > > is fairly simple. There are 3 functions: `process_node`, `process_way`, > and `process_turn`. The `process_way` function is run for every way in the > OSM file you input, and it decides whether to include it in the routing > graph (by setting properties on the `result` object), or to exclude it (by > simply returning without doing any work). > > As someone else pointed out in another thread, the `car.lua` profile is > pretty complex - it's developed over time, and has a lot of logic in it > that makes it hard to understand. I'd start with the testbot profile > above, and add the stuff you think you need. > > You might also want to take a look at > https://github.com/Project-OSRM/osrm-frontend/tree/gh-pages/debug which is > a web viewer that can show you what the routing graph looks like. > > daniel > > On Mon, Apr 30, 2018 at 8:39 AM, Patrick Agin <[email protected]> > wrote: > > > Thanks again Daniel. Could you just give me an example (with a snippet of > > code maybe) of a good implementation of point 1 (Lua profile that only > > includes public transport ways in the graph). I just don't have any clue > > about implementing this and I'm not aware of any docs that could help me > > with that. > > Patrick > > > > 2018-04-30 11:30 GMT-04:00 Daniel Patterson <[email protected]>: > > > >> Hi Patrick, > >> > >> This could be tricky, depending on how long the traces you're trying to > >> match are. > >> > >> The OSRM Lua profiles basically act as a filter - they decide which > >> ways from OSM are included in the routing graph, and assign properties to > >> edges in the graph. > >> > >> The map-matching algorithm will try to snap your coordinate list to the > >> most likely path across the routing graph. > >> > >> In order to only snap to public transport paths, you'll need: > >> > >> 1) A Lua profile that only includes public transport ways in the > >> graph. > >> 2) A way to ensure that all the public transport paths are connected > >> together (this could be difficult without including lots of extra stuff you > >> don't want in the graph) > >> 3) GPS traces that are somewhat close to the actual paths themselves, > >> as mapped in OSM > >> > >> (2) could be the really tricky bit here. If the public transport paths > >> are not connected, then any GPS trace you have that spans two public > >> transport routes (say, a bus change, or a train change) but those routes > >> aren't actually connected by the graph, will cause problems with the > >> map-matching algorithm. > >> > >> daniel > >> > >> On Mon, Apr 30, 2018 at 7:23 AM, Patrick Agin <[email protected]> > >> wrote: > >> > >>> Hi everyone, > >>> I'm trying to define a profile to force match service to take public > >>> transport routes only. I tried to add residential in excludable so I can > >>> add exclude=residential at query time but it does not change anything to > >>> the returned answer. Can someone help or point me towards documentation > >>> that could help (I've read profile.md but it does not help me much). > >>> Thanks a lot, > >>> Patrick (newbie with osrm) > >>> > >>> _______________________________________________ > >>> OSRM-talk mailing list > >>> [email protected] > >>> https://lists.openstreetmap.org/listinfo/osrm-talk > >>> > >>> > >> > >> _______________________________________________ > >> OSRM-talk mailing list > >> [email protected] > >> https://lists.openstreetmap.org/listinfo/osrm-talk > >> > >> > > > > _______________________________________________ > > OSRM-talk mailing list > > [email protected] > > https://lists.openstreetmap.org/listinfo/osrm-talk > > > > > _______________________________________________ > OSRM-talk mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/osrm-talk -- michal palenik www.freemap.sk www.oma.sk _______________________________________________ OSRM-talk mailing list [email protected] https://lists.openstreetmap.org/listinfo/osrm-talk
