[Tagging] Tunnels and bridges

[Martin Vonwald]

2013/1/31 Malcolm Herring <malcolm.herring at btinternet.com>:
> Martin,
>
> Maybe I am missing something from your proposal.

No proposal - just ideas ;-)


>I had understood it to mean
> that bridges should be mapped as distinct features, separate from the ways
> that pass over and under. Therefore, "bridge=..." tags on the ways would
> become redundant and remove the ambiguity and messy rendering that they
> cause when more than one way crosses the same bridge.

I would not do that. I would keep the bridge=xxx tags for backward
compatibility.


> Also, wheat exactly did you mean by "Connect the ways running over the
> bridge to this structure"? This implies a relation to make the connections,
> but you then go on to deprecate the use of relations.

I meant: at the edges of the "structure" connect the OSM ways of the
roads/ways to the OSM way of the "structure". As you already need to
split the roads at the edges of the structure, because you need to add
the layer (and bridge) key within the structure, there are already
nodes present - just connect them with the OSM way of the structure.


regards,
Martin