[talk-ch] tag for "half-tunnel" (galerie in French)

Thomas Ineichen osm.mailinglist at t-i.ch
Sat Nov 21 20:53:51 CET 2009


Salut Marc,

> How should we tag roads like motorway A5 with N5 above ?
> http://maps.google.ch/maps?f=q&source=s_q&hl=fr&geocode=&q=neuch%C3%A2tel&sll=46.362093,9.036255&sspn=8.886545,12.568359&ie=UTF8&hq=&hnear=Neuch%C3%A2tel&ll=46.879614,6.769037&spn=0.068759,0.09819&z=14&layer=c&cbll=46.875982,6.757777&panoid=OroTX9_rW0I4UBcByyxR8g&cbp=12,1.72,,0,-4.91

> Is there a tag for this case?

There are two problems in your case:

1) How to tag roads that overlap for a certain distance:

As  André wrote (and as it is at the moment in OSM), the layer-tag can
be used to assign different layers. Personally, I would not sketch the
lines  that  close  but  leave a gap of about 5 meters. Right now, the
motorway  disappears completely under the primary road on the rendered
map..

2) How to tag a "half-opened tunnel"

AFAIK there is no tag yet for this.
For  rendering-purposes, I would keep the tunnel=yes and add something
like

gallery=yes|left (*)

 or

open_sided=yes|left

and document it in the Wiki.


Regards,
Thomas


(*) Brings the problem of ambiguity I'm not even sure, if 'gallery' is
    understood by an English native (it's 'Galerie' in German).




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