[Tagging] Underground Waterways

[Willi]

On Fri, Jan 7, 2011 at 3:03 PM, David Fawcett <david.fawcett at gmail.com>
wrote:
> Would tunnel=yes be an inappropriate tag?

Yes, according to the Wiki:

"The tunnel tag is used to map ways that runs through an underground
passage. 

You just need to add tunnel=yes where you like to have a tunnel on the
section of highway (for road or rail tunnels) or waterway (e.g. channel
tunnels)."

http://wiki.openstreetmap.org/wiki/Key:tunnel

tunnel=yes is any tunnel.
tunnel=culvert is a more specific tunnel.

Similar for bridge: http://wiki.openstreetmap.org/wiki/Key:bridge.