[Tagging] RFC ele:regional

[Joseph Eisenberg]

Is there a reason to use this new tag ele:regional instead of ele:local=*
which is already mentioned on the Key:ele page?

"The elevation in a local datum can be tagged as ele:local=*, with
elevation specified in metres."

https://wiki.openstreetmap.org/wiki/Key:ele - under "basics" - added back
in 2012:
https://wiki.openstreetmap.org/w/index.php?title=Key:ele&oldid=811890

-- Joseph Eisenberg

On Mon, May 4, 2020 at 1:58 PM Martin Koppenhoefer <dieterdreist at gmail.com>
wrote:
>
>
>
> sent from a phone
>
> >> On 4. May 2020, at 18:54, Greg Troxel <gdt at lexort.com> wrote:
> > This really feels like solving a non-problem.  If you just put what's
> > on the sign in ele, and don't worry about it, that's ok.  If somebody
> > else actually makes a valid, hard-core measuremnt, and fixes it, even
> > better.
>
>
> I thought it could help to have a key which explicitly states that you
just took a value from somewhere else, which is probably using a reference
that is regionally typical (i.e. you took a height from a sign, normally
you will not know which reference is used (sea level of some kind)). When I
find signs on the ground with height information I’m always reluctant to
add the values as it’s not clear whether I should transform them and if
yes, from where to where. The wiki isn’t very clear either.
>
> When you are making a valid hardcore measurement it would be a pity to
throw it into “ele” with its unknown specifics, you’d likely want to be
more precise (I agree ele:datum is fine for this) and a specific tag seems
also more save from being carelessly modified.
>
> Cheers Martin
>
>
>
>
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