[OSM-talk] Key:layer update

[Martin Koppenhoefer]

> Am 13/mar/2014 um 00:28 schrieb "Frank Little" <frankosm at xs4all.nl>:
> 
> We model bridges and tunnels in a specific way in OSM which means we do not need to add additional layer tags (but feel free if you do want to).


IMHO we do not yet model explicit bridges or tunnels at all, we only add attributes to roads or other objects that they are on a bridge or in a tunnel, but we omit the actual tunnel and bridge objects (besides some few relations that are modeled). 

cheers,
Martin