[Tagging] [OSM-talk] Should we map things that do not exist?

[Joseph Eisenberg]

RE: "Tagging this with extra tags is difficult because there usually is some
slope, and measuring it will be tedious at best, time consuming at
worst. Without a measurement, many fellow mappers will reject any
tagging - I'm not aware of any sensible tagging."

Railways can be rather steep so a tag of railway=abandoned is no guarantee
of minimal incline. E.g.:
https://en.wikipedia.org/wiki/List_of_steepest_gradients_on_adhesion_railways

Adding specific tags is better.

If you want to specify that a way is flat, you can use incline=0% (this has
been used over 32,000 times:
https://taginfo.openstreetmap.org/keys/?key=incline#values).

If your GPS includes elevation information, you can probably determine
something like incline=5% for a long gradual uphill section, too: just
divide the elevation change by the total length of the climb,
E.g. 50 meters in 1 km = 5%.

If there is still an embankment or cutting , use embankment=yes or
cutting=yes
(You can additionally micro-map embankments with man_made=embankment)

-- Joseph Eisenberg

On Mon, Jan 4, 2021 at 12:37 PM Roland Olbricht <roland.olbricht at gmx.de>
wrote:

> > One such example could be when a cycleway was created on top. [...]
> > I would definitely delete railway tags if they would have remained till
> > then although I am not sure everybody here would agree with me since
> > there might still remain "traces" like some heaps of ballast stones on
> > the sides.
>
> I strongly disagree. In a mountainous region like my home region, the
> cycleway then will go through cuttings and on embankments, making the
> slope relatively flat.
> Opposed to this, most elevation profiles are too coarse for that and
> suggest substiantial gradients. If you go on a bike, then you will
> appreciate that the way is actually close to flat.
>
> Tagging this with extra tags is difficult because there usually is some
> slope, and measuring it will be tedious at best, time consuming at
> worst. Without a measurement, many fellow mappers will reject any
> tagging - I'm not aware of any sensible tagging.
>
> By contrast to this, it is pretty safe to assume that a way tagged with
> railway=* is almost flat. Standard railways never operate on steep
> inclines. And few or no operators care to construct huge cuttings and
> embankments to flatten a cycleway.
>
> Best regards,
>
> Roland
>
> _______________________________________________
> Tagging mailing list
> Tagging at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/tagging
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20210104/32dde934/attachment.htm>