[OSM-talk] Key:layer update

Frank Little frankosm at xs4all.nl
Wed Mar 12 15:53:31 UTC 2014

Pieren wrote:
> On Wed, Mar 12, 2014 at 3:22 PM, Frank Little <frankosm at xs4all.nl> wrote:
>> Richard Z wrote
>> As mapped, the waterway=stream (Way #138911739) runs underground 
>> (layer=-1),
>> probably through a culvert given the way the stream left and right are
>> separately outlined as waterway=riverbank (and without layer=*). The way
>> (stream) should be tagged as a culvert.
>> Perhaps there is in reality a bridge not a culvert, in which case the road
>> needs splitting and the appropriate new road segment tagged as bridge=yes.
>> In either case, a layer tag is not needed for rendering.
> +1
> Bridge or culvert, one way has to be split (the road for bridge or the
> stream for culvert) to identify the structure and one of the ways
> needs a tag layer. It's true that the shared node is wrong here
> excepted if it's a ford. It needs a local survey.
> Same mapping issues can be found between roads and railways, railways
> and rivers, etc
> Pieren
Unless it is a level crossing of road/rail, of course (in which case a tag is 
needed on the common node, just as with fords).

But when did this happen as reported by Richard Z.:
The initiative to have implicit layer tags for those feature was voted down so 
every tunnel and bridge should
now have one.

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