Martin There is consensus that the key > "height" is describing the height of the structure from the ground to > the top.
+1 (I think there is no other way of doing it) 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). > I do not understand what that means. For me height is always in meters, and meters don't change with the system of reference (unless they move close to the speed of light ) > There are 2 alternatives: > > a) ele is the elevation of the ground around/below the tower (in the > case of a mountain summit it would be the elevation of the mountain, > not the tower). > +1 b) ele is the elevation of the highest point at the tagged spot, i.e. > the top of the tower > > I would say abolutely not, even though there are examples where, say a restaurant on top of a tower gives the elevation from see level, but that most likely be altitude and not elevation. I would stick to this terminology: The tip of a tower with *height* x meters on top of a mountain peak at * elevation* y meters is at an *altitude* of y+x meters. Volker > Comments welcome. The idea is to clarify this aspect on the wiki page > for the key "ele". > > cheers, > Martin > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > http://lists.openstreetmap.org/listinfo/tagging > -- Volker SCHMIDT Via Vecchia 18/ter 35127 Padova Italy mailto:vosc...@gmail.com office phone: +39-049-829-5977 office fax +39-049-8700718 home phone: +39-049-851519 personal mobile: +39-340-1427105 skype: volker.schmidt
_______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
