[Tagging] waterway=penstock to complete pipeline tagging

Martin Koppenhoefer dieterdreist at gmail.com
Tue Oct 6 09:57:05 UTC 2015

2015-10-06 10:42 GMT+02:00 Christoph Hormann <chris_hormann at gmx.de>:

> >
> > can you give an example for a pipeline without a pipe?
> Apart from the pressure tubes of hydropower plants the most common case
> is probably sewer pipes.  For general transport pipelines cutting them
> into rock is rare due to the high costs.  Hydropower penstocks are an
> exception mostly due to the high volume high pressure combination and
> sewage due to the space constraints in urban environments.

but are these called "pipelines"? Aren't those "pressure tunnels" /
"hydraulic galleries"? The only pipeless pipelines I could find in a quick
search are referring to a python library ;-)

I'm not sure (not rethoric, I'm really not sure, maybe we should indeed?)
whether we want to use man_made=pipeline for all kind of linear way for
liquids and gas, regardless of size, length, construction, purpose. The
wiki says the tag is only for "major" pipelines (typical wiki speech, not
usable to make a decision, I'd rather remove this word to avoid splitting
hair). Would the water tubes and sewage tubes in my house be regarded a
"pipeline"? The one in the road in front of my house? What would be a
sensible limit? Might depend on the substance as well, e.g. a beer pipeline
might have only 20mm and would already be significant.

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