[OSRM-talk] How to force match service to return public transport routes only?

Tue May 1 15:05:28 UTC 2018

I understand but my question was (sorry if it was unclear), why is it
different between train and bus?

2018-05-01 10:02 GMT-04:00 Michal Palenik <michal.palenik at freemap.sk>:

> On Tue, May 01, 2018 at 09:30:36AM -0400, Patrick Agin wrote:
> > Thanks Michal and Daniel for your help, I defined my subway profile and
> it
> > works well.
> >
> > Michal, can I ask you why you use this kind of code for the train
> profile:
> > train = way:get_value_by_key('train');
> > if ( not data. train or data. train =='') then return false;
>
> this checks way's tags
>
> >
> > and this kind of code for the bus:
> > bus = get_from_rel(relations, way, "route", "bus", "route");
> > if ( not data.bus =='') then return false;
>
> this one checks relations' tags (of relations that the way is a member
> of)
>
> > Aren't they defined the same way in osm data?
> > Patrick
> >
> > 2018-04-30 13:26 GMT-04:00 Patrick Agin <agin.patrick at gmail.com>:
> >
> > > Thanks again Michal I'll try it soon with subway instead of bus. Out of
> > > curiosity, why do you define highway in process_way function? It does
> not
> > > seem to be used elsewhere.
> > >
> > > 2018-04-30 13:03 GMT-04:00 Michal Palenik <michal.palenik at freemap.sk>:
> > >
> > >> On Mon, Apr 30, 2018 at 12:57:42PM -0400, Patrick Agin wrote:
> > >> > Thanks a lot to both of you. Michal, can I ask you two things:
> > >> > what's the purpose of adding tram and train to excludable?
> > >>
> > >> generally to ignore trains when they do not have a common ticketing
> > >> scheme.
> > >>
> > >> > and about get_from_rel(relations, way, "route", 'bus', "route")
> line, is
> > >> > 'bus' a reserved OSM word or is it defined by you?
> > >>
> > >> function get_from_rel(relations, way, "route", 'bus', "network")
> > >> will find first/random relation of route=bus which the way is a member
> > >> of, and then returns tag "network".
> > >>
> > >> see also
> > >> https://github.com/Project-OSRM/osrm-backend/issues/5032
> > >>
> > >> > I ask the question
> > >> > because I would like to manage subway routes.
> > >> > Patrick
> > >> >
> > >> > 2018-04-30 12:48 GMT-04:00 Michal Palenik <
> michal.palenik at freemap.sk>:
> > >> >
> > >> > > 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 <
> > >> agin.patrick at gmail.com>
> > >> > > > 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 <
> daniel at mapbox.com>:
> > >> > > > >
> > >> > > > >> 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 <
> > >> agin.patrick at gmail.com
> > >> > > >
> > >> > > > >> 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
> > >> > > > >>> OSRM-talk at openstreetmap.org
> > >> > > > >>> https://lists.openstreetmap.org/listinfo/osrm-talk
> > >> > > > >>>
> > >> > > > >>>
> > >> > > > >>
> > >> > > > >> _______________________________________________
> > >> > > > >> OSRM-talk mailing list
> > >> > > > >> OSRM-talk at openstreetmap.org
> > >> > > > >> https://lists.openstreetmap.org/listinfo/osrm-talk
> > >> > > > >>
> > >> > > > >>
> > >> > > > >
> > >> > > > > _______________________________________________
> > >> > > > > OSRM-talk mailing list
> > >> > > > > OSRM-talk at openstreetmap.org
> > >> > > > > https://lists.openstreetmap.org/listinfo/osrm-talk
> > >> > > > >
> > >> > > > >
> > >> > >
> > >> > > > _______________________________________________
> > >> > > > OSRM-talk mailing list
> > >> > > > OSRM-talk at openstreetmap.org
> > >> > > > https://lists.openstreetmap.org/listinfo/osrm-talk
> > >> > >
> > >> > >
> > >> > > --
> > >> > > michal palenik
> > >> > > www.freemap.sk
> > >> > > www.oma.sk
> > >> > >
> > >> > > _______________________________________________
> > >> > > OSRM-talk mailing list
> > >> > > OSRM-talk at openstreetmap.org
> > >> > > https://lists.openstreetmap.org/listinfo/osrm-talk
> > >> > >
> > >>
> > >> > _______________________________________________
> > >> > OSRM-talk mailing list
> > >> > OSRM-talk at openstreetmap.org
> > >> > https://lists.openstreetmap.org/listinfo/osrm-talk
> > >>
> > >>
> > >> --
> > >> michal palenik
> > >> www.freemap.sk
> > >> www.oma.sk
> > >>
> > >> _______________________________________________
> > >> OSRM-talk mailing list
> > >> OSRM-talk at openstreetmap.org
> > >> https://lists.openstreetmap.org/listinfo/osrm-talk
> > >>
> > >
> > >
>
> > _______________________________________________
> > OSRM-talk mailing list
> > OSRM-talk at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/osrm-talk
>
>
> --
> michal palenik
> www.freemap.sk
> www.oma.sk
>
> _______________________________________________
> OSRM-talk mailing list
> OSRM-talk at openstreetmap.org
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>
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