[OSM-dev] smoothness data in gpx files for GPS tracks on osm.org?

["Christian Müller"]

> Gesendet: Sonntag, 28. Januar 2018 um 07:59 Uhr
> Von: Johannes <jotpe at posteo.de>
> An: dev at openstreetmap.org
> Betreff: [OSM-dev] smoothness data in gpx files for GPS tracks on osm.org?
>
> I consider data on the smoothness/roughness of routes to be quite important..
> 
> .. record a track as a GPX file enriched with a vibration coefficient ..

There has been some buzz about Android Bump Recorder App, maybe that helps
in your endeavour.

https://www.heise.de/newsticker/meldung/Smartphones-koennen-Schlagloecher-melden-3935645.html
(german link, sorry)

It was hard to gain acceptance for the smoothness tag, because it is
difficult to translate real world settings _objectively_ into its tag
values.

Another approach for cyclists to judge the quality of a path or
track is to enter data when the surface has last been refurbished /
renewed.  While this maybe not be as specific, there is often a fair
correlation between track age and smoothness.

Yes, it matters how and where the surface is exposed to weather
conditions, so not every track degrades in the same way even if the
materials used to rebuild were of the same quality.  The main ad-
vantage to smoothness however is, that time of renewal is less
debatable / more objective.

If one works on an algorithm that considers date of renewal as part
of its input to calculate a final smoothness value, one could use
it to weigh an intermediate result obtained from other factors, I
suppose.


Greetings
cm