[Tagging] tagging of "ele" / elevation data e.g. in the context of towers

Alan Mintz Alan_Mintz+OSM at Earthlink.Net
Mon Feb 20 12:44:18 GMT 2012

At 2012-02-20 03:44, Martin Koppenhoefer wrote:
>On the German ML we are currently discussing how to applicate "ele" to
>towers (and similar situations). There is consensus that the key
>"height" is describing the height of the structure from the ground to
>the top. There is also consensus to tag elevation data in WGS84 (so
>that numbers in local systems would typically have to be converted
>before you can enter them).

This is the standard for FCC (communications) and FAA (airspace) in the US. 
Well, close at least - elevations are generally "above mean sea level" - I 
don't know how that relates to the WGS84/GPS and/or survey elevation but 
I'd expect them to be close.

Alan Mintz <Alan_Mintz+OSM at Earthlink.net>

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