[Tagging] RFC ele:regional

[Peter Elderson]

If you know the elevation in one system, can the elevation the other
systems be derived from that?

Vr gr Peter Elderson


Op ma 4 mei 2020 om 20:05 schreef Mark Wagner <mark+osm at carnildo.com>:

> On Sun, 3 May 2020 14:16:09 +0200
> Martin Koppenhoefer <dieterdreist at gmail.com> wrote:
>
> > sent from a phone
> >
> > > On 3. May 2020, at 13:06, Volker Schmidt <voschix at gmail.com> wrote:
> > >
> > > When I see an elevation value on the ground I do not see any
> > > reference to the reference system, so I cannot know, as a mapper,
> > > what reference system is at the base of the informaton that I find
> > > on the ground. In that respect the proposal is not at all clear
> > > from a practical perspective
> >
> >
> > the idea is you do not even have to know, simply copy the value from
> > the sign.
>
> What about regions where two or more reference systems are in common
> use?  If I copy an elevation from a USGS benchmark and put it in
> "ele:regional", how does an end-user know if it's a recent benchmark
> measured in NAVD 88 or an older benchmark measured in NVGD 29?
>
> --
> Mark
>
> _______________________________________________
> 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/20200504/4d2bb975/attachment.htm>