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<p>Why can a drilled rock tunnel, or an aqueduct for that matter, not be part of a pipeline? Are you just saying it is unlikely, or do you mean that it would no longer be called a pipeline if part of its distance is drilled through rock instead of being a steel pipe? According to this article that is possible:</p>
<p><a href="http://www.muehlhan.com/index.php/en/markets-and-references/bridges-pipelines/penstock">http://www.muehlhan.com/index.php/en/markets-and-references/bridges-pipelines/penstock</a></p>
<p>"Penstock" indicates the function, not a means of construction.</p>
<p>I think the sentence "Modern aqueducts may also use pipelines" might be better rephrased as "Modern aqueducts may carry the (water) in pipes instead of the traditional open channels."</p>
<p>--colin</p>
<p>On 2015-10-09 18:27, François Lacombe wrote:</p>
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<div class="pre" style="margin: 0; padding: 0; font-family: monospace">According to this wikipedia article : NYC Water supply<br /><a href="https://en.wikipedia.org/wiki/New_York_City_water_supply_system">https://en.wikipedia.org/wiki/New_York_City_water_supply_system</a><br /><br /> I see many terms to talk about Catskill Aqueduct which is a major part<br /> of this system : aquduct, conduit, tunnel, siphon... but pipeline is<br /> never used.<br /> Google tells nothing about Catskill pipeline but has many results<br /> regarding Catskill aqueduct.<br /><br /> Again here : <a href="https://en.wikipedia.org/wiki/Aqueduct_%28water_supply%29">https://en.wikipedia.org/wiki/Aqueduct_%28water_supply%29</a><br /> I think the sentence "Modern aqueducts may also use pipelines", which<br /> sounds like "An aqueduct is not always a pipeline".<br /><br /> I agree with Colin : a pipeline is a route, but won't be composed of<br /> bare rock drilled tunnels.<br /><br /> The waterway=penstock should exist on the wiki to summarize all this<br /> interesting discussion.<br /><br /><br /> All the best<br /> François Lacombe<br /><br /> fl dot infosreseaux At gmail dot com<br /><a href="http://www.infos-reseaux.com">www.infos-reseaux.com</a><br /> @InfosReseaux<br /><br /><br /> 2015-10-09 17:40 GMT+02:00 Colin Smale <<a href="mailto:colin.smale@xs4all.nl">colin.smale@xs4all.nl</a>>:
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0"><br /><br /><br /><br /> I see a pipeline as analogous to a route, i.e. from one place to another,<br /> made up of many contiguous segments of varying types. Many of these segments<br /> may be (steel) pipes, but they may also be drilled through rock or whatever.<br /> A penstock is a particular function of certain pipelines, for example from<br /> high up to the turbine hall. This pipeline can be made of all kinds of<br /> segments, just like all other pipelines.<br /><br /> //colin<br /><br /><br /><br /> On 2015-10-09 16:59, François Lacombe wrote:<br /><br /> Hi everyone,<br /><br /> 2015-10-07 1:02 GMT+02:00 Warin <<a href="mailto:61sundowner@gmail.com">61sundowner@gmail.com</a>>:<br /><br /><br /> I'd like to think anything carrying waste water (sewer) would have a non<br /> permeable lining.. and that lining could be called a 'pipe' and thus it is a<br /> 'pipeline'.<br /><br /> To me the 'tubes' in my house for carrying water/gas are pipes .. and as<br /> they are a line then they are pipelines!<br /><br /><br /> I'd like to consider the pipeline is almost replacable by its operator.<br /> A tunnel, furthermore when it's shielded, carrying water isn't<br /> replacable at all and its components aren't pipes at all.<br /><br /> Digging rock to get a tunnel is a lot heavier than installing a<br /> pipeline. It doesn't have the same environmental footprint too.<br /><br /> Ok to say that sewerage facilities are almost pipelines, but<br /> sometimes, they are drains or tunnel.<br /><br /><br /> 2015-10-09 16:28 GMT+02:00 Bryce Nesbitt <<a href="mailto:bryce2@obviously.com">bryce2@obviously.com</a>>:<br /><br /><br /><br /> The problem with man_made + waterway on the same node, is both are top level<br /> tags.<br /> Here you'd want a refinement tag for pipeline.<br /><br /><br /> I prefer to say that both man_made=pipeline and waterway=* can be<br /> standalone to have a meaning instead of the "top level" expression.<br /><br /> The extension I propose (I'm not refining any existing values here)<br /> isn't only focused on pipeline but on tunnels too.<br /> Due to the reasons we talked this week it shouldn't only concern pipelines.<br /><br /> --<br /><br /> There are two valid but separate goals to keep in mind. Are you mapping<br /> the:<br /> * Visible surface features<br /> * The flow of material<br /><br /> Both are valid mapping goals. For mapping the flow you want a continuous<br /> link of<br /> tags that imply water flow. That penstock comes from a reservoir or weir,<br /> passes through a generating station, and exits into a canal which dumps into<br /> a river<br /> or a sink. That flow could be one way or in the case of storage reservoirs<br /> two ways (pumped<br /> uphill at low demand times).<br /><br /> Equally valid is mapping the surface expression only. Those are pipes<br /> sticking up out of the ground (a man made feature).<br /><br /><br /> I would like to map the visible surface features : man_made=pipeline<br /> ONLY when the penstock is visible and composed of pipes<br /> AND I would like to map the flow of material with waterway=penstock at<br /> the same time.<br /><br /> A penstock may be a pipeline but water is always flowing inside isn't it ?<br /><br /> Cheers<br /><br /> François Lacombe<br /><br /> fl dot infosreseaux At gmail dot com<br /><a href="http://www.infos-reseaux.com">www.infos-reseaux.com</a><br /> @InfosReseaux<br /><br /><br /><br /><br /> _______________________________________________<br /> Tagging mailing list<br /><a href="mailto:Tagging@openstreetmap.org">Tagging@openstreetmap.org</a><br /><a href="https://lists.openstreetmap.org/listinfo/tagging">https://lists.openstreetmap.org/listinfo/tagging</a><br /><br /><br /> _______________________________________________<br /> Tagging mailing list<br /><a href="mailto:Tagging@openstreetmap.org">Tagging@openstreetmap.org</a><br /><a href="https://lists.openstreetmap.org/listinfo/tagging">https://lists.openstreetmap.org/listinfo/tagging</a><br /><br /><br /> _______________________________________________<br /> Tagging mailing list<br /><a href="mailto:Tagging@openstreetmap.org">Tagging@openstreetmap.org</a><br /><a href="https://lists.openstreetmap.org/listinfo/tagging">https://lists.openstreetmap.org/listinfo/tagging</a><br /><br /></blockquote>
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