[OSM-talk] When is a bridge not a bridge?
schuetzm at gmx.net
Fri Jan 23 17:09:40 GMT 2009
(Forwarding to list)
Am Friday 23 January 2009 17:28:17 schrieben Sie:
> As I understood the text of the wiki when I first started, layer 0 is
> the general level of the terrain, so levels 1, 2, 3, 4, 5 are above
> the ground on successively higher bridges, and -1, -2, -3, -4, and -5
> in successively deeper trenches.
Indeed, that's what the wiki page says. Unfortunately I cannot find the place
where the discussion took place when the feature was introduced (probably
before today's "standardization process"); I'm pretty sure that this was not
One could argue that because the default is layer=0, the natural surface would
be in this layer. However, we do not model the natural surface, so this seems
to be a completely arbitrary limitation. Lacking a definition for "natural
surface", there isn't even an application where this information could be
Of course it does no harm either, so this is probably just nitpicking.
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