[Tagging] Proposed Features - RFC - Penstock waterways

[François Lacombe]

Hi all,

Regarding thsi proposal, I've moved waterway=duct to waterway=pressurized.
It covers many kind of situations, from natural siphons to man made
penstocks.
While a penstock is always a (man made) pipeline, a natural siphon isn't.
Finally we may get more correct use of pipeline and canals which are
currently overused for underground and pipe flow facilities.
https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies

It introduces this new value beside all existing open flow values (river,
stream, canal...).

Feel free to complete comments, all the best

François

2017-12-07 11:06 GMT+01:00 François Lacombe <fl.infosreseaux at gmail.com>:

> Hi,
>
> 2017-12-07 2:42 GMT+01:00 Andrew Davidson <theswavu at gmail.com>:
>
>> 1. waterway is the wrong key. Waterways are for open-channel features.
>> There is already a man_made=pipeline for pipe flow. I'm not sure why we
>> need a different tag for this.
>>
> Can you link me where waterway is explicitly described for open-channel
> ways only please ?
>
> man_made=pipeline is not a water specific key and It's a great benefit to
> get raw water hydrographic graph by looking at waterway=* only.
> Like highway=* is not specific to open air roads but for bridges and
> tunnels too, I don't see any objection to involve tubes and pressure pipes
> into waterway, with a new dedicated value as to not break things regarding
> existing consumers.
>
>
>
>> 2. duct is the wrong value. Ducts refers to low pressure pipes carrying
>> gases.
>>
>
> I agree it's not perfect
>
> How can I refine it ?
> It is intended for pipe flow waterways
>
> I really have difficulties to understand a tunnel without tube carrying
> pipe flow water as man_made=pipeline
> Then waterway=pipeline sounds more restrictive than its actual target.
>
> François
>
>
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