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

["Christian Müller"]

> Gesendet: Dienstag, 16. Januar 2018 um 14:50 Uhr
> Von: "Mateusz Konieczny" <matkoniecz at gmail.com>
> An: "Christian Müller" <cmue81 at gmx.de>
> Cc: tagging at openstreetmap.org
> Betreff: Re: [Tagging] Sidewalks and cycleways as tags vs as extra lines
>
> Also, I am curious whatever you think that it is self-explanatory and
> easier to understand than cycleway=opposite.

cycleway:left=lane|track
cycleway:left:oneway=-1

This may not be completely self-explanatory either, e.g. you would have
to mention if cycleway:left:oneway is processed in or without dependence
on a possibly existing oneway=* tag describing the general oneway status
for motorized traffic.

It probably makes sense to process it independently, because only then
it can be used in a consistent manner on non-oneway streets.

To deduct if you're dealing with an opposite cycleway (as the osm wiki
defines it now) in a oneway street, you'd need to compare oneway=* and
cycleway:left:oneway=* values.


The reason you think cycleway=opposite is easy to understand, is because
it has had lots of "page views" and the specialities around it have be-
come implicit knowledge of the people using it, I suppose.  Beating me
might change that, of course.

If you consider its current use case (appending a differently coloured
arrow in opposite direction to the one that denotes oneway streets in
e.g. mapnik), then, for this use case, the betold imprecision does not
matter, but for anything else it may be too sloppy.


Greetings
cm