[Tagging] Bridges and layers

James Livingston lists at sunsetutopia.com
Wed Jul 28 10:27:31 BST 2010

On 28/07/2010, at 1:13 AM, M∡rtin Koppenhoefer wrote:
> I think that there is definitely space for a bridge-relation to deal with all
> these informations and bring them together. An alternative might be to
> draw an (additional) polygon for the bridge area in projection (with
> common nodes on the start and end) and tag it appropriately with name
> and other details.

Someone mentioned http://wiki.openstreetmap.org/wiki/Relations/Proposed/Bridges_and_Tunnels up-thread, is there anything it doesn't cover? I've been using it for over a year, although I haven't mapped any really crazy scenarios.

You can specify properties (name, ref, etc) of the bridge as tags on the relation. You can specify things in the "under" role to indicate physical layering. You can also specify a way to use as the outline of the bridge if you've got good enough imagery (although I haven't used that bit personally).


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