[OSRM-talk] routing profile tracktype

[Daniel Hofmann]

Have a look at profiles/lib/handlers.lua - in there you will find handlers
for certain situations, for example here for surfaces

https://github.com/Project-OSRM/osrm-backend/blob/5.6/profiles/lib/handlers.lua#L275-L293

All handlers are getting called in order here

https://github.com/Project-OSRM/osrm-backend/blob/master/profiles/foot.lua#L200-L240

and exit early if a handler returned false

https://github.com/Project-OSRM/osrm-backend/blob/5.6/profiles/lib/handlers.lua#L505-L511

You can either add your own handler discarding ways completely or better
penalize such ways by setting a high weight.
Then the routing engine will always find a way but prefer ways with your
tracktype criteria.

Here's the Lua `result`'s attributes
https://github.com/Project-OSRM/osrm-backend/blob/master/src/extractor/scripting_environment_lua.cpp#L309-L350

Make sure to test your profile locally on small extracts and / or in the
debug map.


Hope this helps as a start.

Cheers,
Daniel J H

On Wed, Mar 8, 2017 at 3:33 PM, Jäger, Frank (KRZ) <F.Jaeger at krz.de> wrote:

> Hallo,
> I'm a new in this list and new in using osrm.
>
> My first routing-service is working now and embedded in an gis-application.
> My attention is to find the "nearest school" for an address between some
> alternatives.
>
> Next step is to fine-tune the foot-profile to a
> "save-way-to-school-profile".
> For example
>
> + highway=track;tracktype=grade1 is acceptable. The street has no name but
> you can walk on without getting dirty shoes.
>
> - highway=track;tracktype=grade4 is not acceptable for routing 8 year old
> children to school.
>
> Is there any example to use "tracktype" as a sub-type auf "track" in the
> LUA-Profile to exclude this ways from being used?
>
>
> Greetings
> Frank Jäger
>
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