On Fri, Oct 14, 2011 at 2:18 PM, John F. Eldredge <j...@jfeldredge.com> wrote:
>
> In the case of a subway station, this will mean that the station's area will 
> need to underlay other mapped objects, and the mapper will need to map the 
> access tunnels as well as the station proper.


Burrr! Openstreetmap is not made for mapping in 3D atm, even though
people do try [1]. Even looking at 3D renders of subway stations
complexes make my head go around. So lets not use building=* for
subsurface buildings, but I'm guessing people are already doing this?
[2]


[1] http://wiki.openstreetmap.org/wiki/Proposed_features/Building_attributes
[2] http://www.openstreetmap.org/browse/way/112427969  subway tagged
as building and layer=-1
-- 
/emj

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