[Tagging] Question about waterway=pressurized

François Lacombe fl.infosreseaux at gmail.com
Wed Sep 15 06:09:40 UTC 2021

We should think about what makes a siphon special, different from another
actual pressurised pipeline going up and down.

I'm not sure a tunnel=siphon will be suitable in any situations and at
which point exactly we should call a U-shaped pipeline an inverted_siphon.
It should be really clear to define it

tunnel=* is barely combinable with man_made=pipeline unless the first hosts
the second for instance.

My 2 cts


Le mer. 15 sept. 2021 à 02:03, Martin Koppenhoefer <dieterdreist at gmail.com>
a écrit :

> sent from a phone
> On 15 Sep 2021, at 00:56, Kyle Hensel <K.y.l.e at outlook.co.nz> wrote:
> I think a tag like tunnel=siphon would be useful for inverted siphons.
> Siphon are distinct from culverts and flooded tunnel, which are currently
> the only defined values of tunnel=* for waterways.
> Would it be worth making a proposal for tunnel=siphon?
> as there are siphons and inverted siphons, for clarity it could be
> tunnel=inverted_siphon,
> not sure about the property key, these are not actually tunnels, they are
> pressurized tubes. Maybe tunnel is just fine as we’re already used to
> tunnel=culvert?
> Cheers Martin
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