[Tagging] Sidewalks and cycleways as tags vs as extra lines

["Christian Müller"]

> Gesendet: Dienstag, 16. Januar 2018 um 14:24 Uhr
> Von: "Volker Schmidt" <voschix at gmail.com>
> An: "Tag discussion, strategy and related tools" <tagging at openstreetmap.org>
> Betreff: Re: [Tagging] Sidewalks and cycleways as tags vs as extra lines
> 
> Filtering out separate cycleways that accompany roads would be plain wrong.
> A bicycle router should get me on cycleway (and off the road).

Do you remove the line idealization in case you have mapped the road as an area?

The thing is osm does not try to accomodate a single use case, but some.
So imho its plain wrong to say a specific use case is plain wrong just
because you do not have it.  If its your data, then yes, go along wrong
and right, but osm has been a process of finding what works for at least
a bunch of people.  It's not free of contradiction, do you think it is?
Neither is it free of redundant information and it is questionable if
this is to aim at.  Some plausibility checks rely on redundant data,
automatic or not.
 
> Double tagging, i.e. cycleway=track on the road plus a separate parallel
> highway=cycleway is only undesirable. I remove the redundant cycleway=track
> when I encounter it.

And the next mapper removes the separate track, because in his mind, the
separate track is redundant.  If he/she forgets to re-add the information
you have deleted on the main road, then we've nicely destroyed valid in-
formation in the process of finding valid representation.


Greetings
cm