[Tagging] Clearer definition of tunnel=flooded: when should it be used instead of tunnel=yes or tunnel=culvert?
fl.infosreseaux at gmail.com
Sun Mar 22 18:08:05 UTC 2020
Le dim. 22 mars 2020 à 18:35, Volker Schmidt <voschix at gmail.com> a écrit :
> Slippery terrain. In the sense of definitions.
> Concerning the tunnel=flooded wiki page:
> The symbol shows free flowing water (air above the surface), wherea the
> first example is for a headrace where "no air can get inside" Why is this
> situation not tagged as pipeline? (see last row in this table
The point of the symbol is to show water in the whole tunnel section,
independently of flowing regime.
To me a tunnel is different from a pipeline in regard of structure and
Both tunnels and pipelines could have usage=headrace or usage=transmision
> The page states:
> ... tunnel <https://wiki.openstreetmap.org/wiki/Key:tunnel>=yes
> <https://wiki.openstreetmap.org/wiki/Tag:tunnel%3Dyes> where a path is
> usually intended for human to safely pass and where water level is usally
> controlled for safety reasons "
> I don't find areference to this implied meaning of tunnel=yes
> Many, if not the majority of the UK Inland Waterways canals have no
Then tunnel=flooded is more appropriate
This distinction has been determined to introduce tunnel=flooded.
> Other comments on the key "tunnel", referring to taginfo "tunnel="
> Absence of "tunnel= *" means: "this way is not in a tunnel of any type"
> "tunnel=yes" on a way means: "this way is in a tunnel of some type"
> It looks as if tunnel:type
> <https://taginfo.openstreetmap.org/keys/tunnel%3Atype> is practially not
> We use instead tunnel= *
> <https://taginfo.openstreetmap.org/search?q=tunnel%3D> to indicate the
> type of tunnel.
:type suffix doesn't bring any additional information, indeed.
> This tagging is unfortunate, but in line with the (original) bridge
> tunnel=culvert is the most frequent value: 1208667 uses
> tunnel=flooded is rare in comparison; 2060 uses
> There is also 3337 instances of tunnel=covered, which, at least in Italy
> (140) seem mainly tagging errors
Fully disposed to make any improvement to wiki according to those points.
All the best
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