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+...@carnildo.com>: > On Sun, 3 May 2020 14:16:09 +0200 > Martin Koppenhoefer <dieterdre...@gmail.com> wrote: > > > sent from a phone > > > > > On 3. May 2020, at 13:06, Volker Schmidt <vosc...@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@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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