[Tagging] Question about waterway=pressurized

Volker Schmidt voschix at gmail.com
Tue Sep 14 15:07:04 UTC 2021


Question to François: is an inverted-siphon (botte sifone, pont-siphon)
piece of waterway to be mapped as pressurised?

On Tue, 14 Sep 2021, 16:18 François Lacombe, <fl.infosreseaux at gmail.com>
wrote:

> Hi Kyle,
>
> Le mar. 14 sept. 2021 à 03:24, Kyle Hensel <K.y.l.e at outlook.co.nz> a
> écrit :
>
>>  Is there are reason why waterway=pressurized is used instead of
>> waterway=river/stream/canal/drain and pressurized=yes?
>>
>
> Yes, waterways are defined according to their permanent flowing regime.
> Some are free flowing, others are pipe flowing.
> A given waterway can't be both as it requires a special prerequisites to
> handle pressurised water.
>
> https://wiki.openstreetmap.org/wiki/Waterways#Artificial_waterways:_pressurised_vs_Open-flow_Waterways
>
> This table gives all values according to their regime
> https://wiki.openstreetmap.org/wiki/Key:waterway#Values
>
> River, streams, canals and drains are defined as free flowing waterways,
> so it wasn't consistent to propose pressurised=yes for them.
> If a river goes punctually in a permanent pressurised culvert,
> waterway=pressurised + tunnel=culvert sounds the most appropriate
> possibility.
> By the way, a river relation can obviously involve sections with different
> regimes.
>
> In a perfect world we would have cleared waterway=* from all other values
> than flowing regime (move waterway=pier or waterway=fuel to man_made or
> amenity).
> Never mind, I go back sleeping :)
>
> All the best
>
> François
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