[Tagging] waterway=lock_gate - is it only for nodes?

[Malcolm Herring]

On 16/03/2015 16:35, Bryce Nesbitt wrote:
> If you're a router following a way, having the node marked makes the job
> easier.

Is that not "tagging for an app"?

A similar case is bridges. Here the bridge tag could be on a segment of 
the way over the bridge, the way under the bridge, a node on either or 
and area round the bridge structure. Any of these may carry attributes 
such as weight limit, headroom, etc. A smart routing app ought to be 
able to work with any of these cases, using the headroom for a route 
that passes under & the weight limit for routes that pass over.

This is the same for lock gates, which is a similar class of object - 
the waterway passes through (when open) and footways, etc pass over the 
gate (when closed). Wherever the tags are placed, any consumer app 
should be able to cope.