I'm all for specifying elevation of mountain peaks etc in other datum which may work better than WGS:84.
I think it's better to specify which datum the value is in, it'll be a nightmare over time working out which datum the original mapper intended as new datums are rolled out and are upgraded, and leaves confusion if there are multiple datum in use. ele:<datum>=value Where <datum> is the height datum. Next question is then how to specify <datum>, in Australia we commonly use https://www.ga.gov.au/scientific-topics/positioning-navigation/geodesy/ahdgm/ahd, so could use ele:ahd but that probably collides with other anachronisms globally so is not ideal. There is an EPSG code https://spatialreference.org/ref/epsg/5711/ for the datum, perhaps ele:epsg:5711= is better then. I'm not sure if there are any issues legally using EPSG codes, but presume it's okay. On Sun, 3 May 2020 at 20:06, Martin Koppenhoefer <dieterdre...@gmail.com> wrote: > I’m asking for comments on > https://wiki.openstreetmap.org/wiki/Proposed_features/ele:regional > > Cheers Martin > > sent from a phone > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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