[OSRM-talk] ferry routing problem

[Daniel Hofmann]

A couple of things I'm seeing here:


The ferry does not have a duration tag so you will get default speeds; you
could add duration data to
http://www.openstreetmap.org/way/81817423#map=17/46.69224/7.90466&layers=D

The default profiles set speed for ferries but they do not (yet) modify
weights for ferries; you can set realistic speeds and independently change
routing weights now; see
https://www.openstreetmap.org/user/happygo/diary/40564

Related: we optimize on weight and not on speed; even though the road could
be faster it can have a high weight penalty on it; check weight responses
in http://project-osrm.org/docs/v5.10.0/api/#result-objects


Hope that helps,
Daniel J H



On Wed, Nov 1, 2017 at 12:35 PM, michael spreng <mailinglists at m.spreng.ch>
wrote:

> Hi
>
> We have a problem on routing.osm.ch, that a ferry is used too often,
> even though I set the speed of the ferry very low, such that it should
> only be used if there is an exceptionally long detour without it. Here
>
> http://routing.osm.ch/?z=14&center=46.696227%2C7.941270&
> loc=46.709618%2C7.962899&loc=46.688088%2C7.898548&hl=en&alt=0&srv=2
>
> I would assume that it takes the road along the shore, because it has a
> four times faster speed. But the routing uses the ferry never the less.
> See https://routing.osm.ch/debug/bike-touring.html#14/46.6975/7.9469 for
> the speeds.
>
> Another problem I have is with the foot profile, where the ferry does
> not show up in debug:
> https://routing.osm.ch/debug/foot.html#14.42/46.7076/7.9472
>
> But it is obviously in the routing graph, because again it gets
> preferred to the way along the shore:
>
> http://routing.osm.ch/?z=14&center=46.697464%2C7.946935&
> loc=46.709618%2C7.962899&loc=46.688088%2C7.898548&hl=en&alt=0&srv=3
>
> The profiles can be seen here:
> https://github.com/sosm/cbf-routing-profiles
>
> Does someone have some insight on what I'm doing wrong?
>
> Michael
>
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