According to this wikipedia article : NYC Water supply https://en.wikipedia.org/wiki/New_York_City_water_supply_system
I see many terms to talk about Catskill Aqueduct which is a major part of this system : aquduct, conduit, tunnel, siphon... but pipeline is never used. Google tells nothing about Catskill pipeline but has many results regarding Catskill aqueduct. Again here : https://en.wikipedia.org/wiki/Aqueduct_%28water_supply%29 I think the sentence "Modern aqueducts may also use pipelines", which sounds like "An aqueduct is not always a pipeline". I agree with Colin : a pipeline is a route, but won't be composed of bare rock drilled tunnels. The waterway=penstock should exist on the wiki to summarize all this interesting discussion. All the best François Lacombe fl dot infosreseaux At gmail dot com www.infos-reseaux.com @InfosReseaux 2015-10-09 17:40 GMT+02:00 Colin Smale <colin.sm...@xs4all.nl>: > > > > > I see a pipeline as analogous to a route, i.e. from one place to another, > made up of many contiguous segments of varying types. Many of these segments > may be (steel) pipes, but they may also be drilled through rock or whatever. > A penstock is a particular function of certain pipelines, for example from > high up to the turbine hall. This pipeline can be made of all kinds of > segments, just like all other pipelines. > > //colin > > > > On 2015-10-09 16:59, François Lacombe wrote: > > Hi everyone, > > 2015-10-07 1:02 GMT+02:00 Warin <61sundow...@gmail.com>: > > > I'd like to think anything carrying waste water (sewer) would have a non > permeable lining.. and that lining could be called a 'pipe' and thus it is a > 'pipeline'. > > To me the 'tubes' in my house for carrying water/gas are pipes .. and as > they are a line then they are pipelines! > > > I'd like to consider the pipeline is almost replacable by its operator. > A tunnel, furthermore when it's shielded, carrying water isn't > replacable at all and its components aren't pipes at all. > > Digging rock to get a tunnel is a lot heavier than installing a > pipeline. It doesn't have the same environmental footprint too. > > Ok to say that sewerage facilities are almost pipelines, but > sometimes, they are drains or tunnel. > > > 2015-10-09 16:28 GMT+02:00 Bryce Nesbitt <bry...@obviously.com>: > > > > The problem with man_made + waterway on the same node, is both are top level > tags. > Here you'd want a refinement tag for pipeline. > > > I prefer to say that both man_made=pipeline and waterway=* can be > standalone to have a meaning instead of the "top level" expression. > > The extension I propose (I'm not refining any existing values here) > isn't only focused on pipeline but on tunnels too. > Due to the reasons we talked this week it shouldn't only concern pipelines. > > -- > > There are two valid but separate goals to keep in mind. Are you mapping > the: > * Visible surface features > * The flow of material > > Both are valid mapping goals. For mapping the flow you want a continuous > link of > tags that imply water flow. That penstock comes from a reservoir or weir, > passes through a generating station, and exits into a canal which dumps into > a river > or a sink. That flow could be one way or in the case of storage reservoirs > two ways (pumped > uphill at low demand times). > > Equally valid is mapping the surface expression only. Those are pipes > sticking up out of the ground (a man made feature). > > > I would like to map the visible surface features : man_made=pipeline > ONLY when the penstock is visible and composed of pipes > AND I would like to map the flow of material with waterway=penstock at > the same time. > > A penstock may be a pipeline but water is always flowing inside isn't it ? > > Cheers > > François Lacombe > > fl dot infosreseaux At gmail dot com > www.infos-reseaux.com > @InfosReseaux > > > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging