Am Fr., 8. Mai 2020 um 14:26 Uhr schrieb Greg Troxel <g...@lexort.com>:
> Martin Koppenhoefer <dieterdre...@gmail.com> writes: > > > Am Fr., 8. Mai 2020 um 03:26 Uhr schrieb Greg Troxel <g...@lexort.com>: > > the "definition" for "ele:local" (in German language on the English talk > > page of the tag) seems to be about this: a local datum based on a local > > reference (i.e. not the same as ele:regional). I am not in any way > involved > > in ele:local, just wanted to point it out. > > That does sound like what I mean by local. I would say that heights in > such local systems should not be entered into OSM, and I would find > their use in anything tourist-facing to be very strange. > It could be useful when mapping something like a building. You could establish a certain elevation as local zero (e.g. the elevation of the ground floor) and have all other levels based on this. It is something that could also not be needed because of an editor who abstracts this (no need to store relative information if some frontend could do it), but I would not hinder people from experimenting with it. > > ele:regional is about admitting that you don't know > > But, it asserts that the value is in some particular datum, and that you > can tell which one from knowing the area. All of this is untrue. maybe a particular datum can not be given, but you can be quite sure (as sure as you are willing to accept from a tag which pretends it is) it is one of those common in the area (which also will not differ a lot, probably). > As I said before, if you want to put something like > > information=board > inscription="Mount Washington // Elevation 6288 Feet" > > that's totally fine. > yes, but I want the elevation to be in a semantic tag, not in description/note/name/inscription [not want] any notion that HAE is reasonable in OSM > I am fine with this. HAE is not what casual mappers would expect (to have the sea signficantly different than 0). But I have come to the impression that some people would prefer HAE because it can be seen more logical when speaking about WGS84. Cheers Martin
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