[OSRM-talk] Small way neglected

[Daniel Patterson]

OSRM isn't designed to provide perfect information along the route like
that - but it can be hacked to get close.  When I built out the elevation
profile feature for skitrails.com, I used a combination of a DEM in postgis
along with the OSRM route geometry to make the elevation profile, so not
directly in OSRM itself.

For highlighting tagged difficulty sections, what you could try us using
`piste:difficulty` as part of the `name` attribute in OSRM - it _should_
emit a new step for each new name along the path, so if difficulty changes,
you'd get a new step at that point.

You would need to remove the appended `piste:difficulty` tag from any name
you wanted to display on screen later on though.

daniel

On Tue, Dec 14, 2021 at 10:40 AM Yves <ycai at mailbox.org> wrote:

> Yes, exactly, I'm playing with OSRM to eventually replace the routing
> backend at opensnowmap.org
> This feature provides the user a topo highlighting the various
> difficulties along the route.
> Yves - Opensnowmap
>
> Le 14 décembre 2021 19:13:55 GMT+01:00, Daniel Patterson <
> daniel at mapbox.com> a écrit :
>>
>> Yves,
>>
>>   I would say that OSRM's step-by-step instructions are definitely not
>> optimized for nordic ski trails.  The route _geometry_ will be correct, but
>> the steps are primarily designed to look at road class (highway=) and names
>> - none of the piste: tags are considered when generating steps.
>>
>>   What does the optimal output look like in your opinion?  As a long-time
>> nordic ski racer myself, if I even bothered to use navigation, I'd mostly
>> only be interested in locations where there were intersections.  Are you
>> looking to analyze the various difficulty ratings along the selected route?
>>
>> daniel
>>
>> On Tue, Dec 14, 2021 at 10:04 AM Yves via OSRM-talk <
>> osrm-talk at openstreetmap.org> wrote:
>>
>>> Hello,
>>> Playing around with OSRM, I figured that smaller ways seems to be
>>> coalesced with others to form a single 'step' in the output.
>>> I can't find any parameter in the Lua config to change this behaviour
>>> (yet).
>>> Any hint is appreciated.
>>> The use case is a short nordic skiing way with a different
>>> piste:difficulty along a much longer route.
>>> www.openstreetmap.org/way/103175249
>>> Regards,
>>> Yves
>>> _______________________________________________
>>> OSRM-talk mailing list
>>> OSRM-talk at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/osrm-talk
>>>
>>
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