Re: [Tagging] Node objects in tunnels or on bridges?

[André Pirard]

On 2015-06-08 13:29, Richard wrote : Hi, quite often there are node-type objects on bridges or in tunnels. What to do with them? Tunnel or bridge tags are dfined only for ways. In my mind: bridges are piece of concrete below the roads (tarmac) and hence should be tagged at level=-1 they should not split the road but be overlaid as in the real world, rendered with two stripes extending on both sides of the road, look at an aerial photo of a bridge; but it wouldn't hurt if the renderer decided to make it artificially more apparent they may have their own attributes, like a name, without overwriting those of the road tunnels are piece of concrete (or rocks) above the roads and hence should be tagged at level=+1, hiding roads they should not split the road but overlay them as in the real world, which does no prevent the renderer drawing the road as dotted lines streams and rivers repeatedly pass under bridges and culverts and there is no good reason to have them step up and down on each occasion they should be tagged at level=-2 full length culverts should be tagged at level=-1 I suspect that the reply to this will be 'NO, I've never seen anything like this'. But is that a good reason?  With such answers, such things as (real) railways wouldn't exist. The correctness of an idea is often best indicated by the consequences. And the consequences regarding what you ask is that the objects, like waste bins, are not necessarily on the bridge or in the tunnel but can simply be on the road.  Isn't that getting logical?  But it would be possible to hang them on tunnel walls as tunnels shouldn't be ways but different objects (as another logical consequence). Avoiding splits, especially for streams and rivers, is a help for Nominatim to not show tiny pieces of ways (1). Note to Osmose: error message 4110 incorrectly states 'Long Waterway underground and no tunnel'. A waterway at level=-X is not underground, it's under what it crosses. Cheers André. (1) and the final step towards avoiding splits would be my OVERLAY aka SEGMENT proposition, but there's never been a reply to this message.

_______________________________________________
Tagging mailing list
Tagging@openstreetmap.org
https://lists.openstreetmap.org/listinfo/tagging