[Tagging] Meaning of tunnel=flooded vs tunnel=yes for waterways?

[François Lacombe]

Hi Joseph,

Le mer. 29 mai 2019 à 01:55, Joseph Eisenberg <joseph.eisenberg at gmail.com>
a écrit :

> I'm a little confused about how to decide when to use tunnel=flooded
> vs tunnel=yes with waterway=canal or other free-surface-flow
> waterways. Is this tag meant to replace all instances of tunnel=yes
> for large waterways, or are there situations when tunnel=yes with
> waterway=canal would still be needed?
>

As mentioned on wiki Talk, look at those two pictures regarding waterway
and tunnels :
tunnel=flooded :
https://wiki.openstreetmap.org/w/images/9/91/Waterway_drain_outlet.jpg
tunnel=yes :
https://www.pamline.com/sites/pamline_en/files/pose_en_galerie_tuyau_aep_gros_dn.jpg

Additionally you can look at this for waterway=canal + tunnel=yes
https://files1.structurae.de/files/photos/3076/dscn6606.jpg

tunnel=flooded + man_made=pipeline isn't so recommended because it means
that the pipeline is inside a flooded tunnel.
It occurs when the tunnel is dug under groundwater level (I know at least
one tunnel like this in Paris)
Or here as a penstock runs inside an underground tailrace canal :
https://www.openstreetmap.org/way/319267776

Nevertheless, this doesn't solve situations like this :
https://www.guerrillaexploring.com/gesite/public_html/images/guerrilla/GES011/GES011-11.jpg
Many pipes and cables are in the same tunnel, like many bike lanes, car and
bus lanes are on the same bridge.

Hope it helps

François
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20190530/4469ae13/attachment.html>