<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Oct 5, 2015 at 4:41 AM, François Lacombe <span dir="ltr"><<a href="mailto:fl.infosreseaux@gmail.com" target="_blank">fl.infosreseaux@gmail.com</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
Currently, I find something missing regarding man_made=pipeline +<br>
substance=water because a pipe carrying water can correspond to many<br>
things in reality.<br>
man_made=pipeline + substance=water + *waterway=penstock* would fill the lack.<br></blockquote><div><br></div><div>The problem with man_made + waterway on the same node, is both are top level tags.</div><div>Here you'd want a refinement tag for pipeline.</div><div><br></div><div>--</div><div><br></div><div>There are two valid but separate goals to keep in mind. Are you mapping the:</div><div>* Visible surface features</div><div>* The flow of material</div><div><br></div><div>Both are valid mapping goals. For mapping the flow you want a continuous link of</div><div>tags that imply water flow. That penstock comes from a reservoir or weir, </div><div>passes through a generating station, and exits into a canal which dumps into a river</div><div>or a sink. That flow could be one way or in the case of storage reservoirs two ways (pumped</div><div>uphill at low demand times).</div><div><br></div><div>Equally valid is mapping the surface expression only. Those are pipes</div><div>sticking up out of the ground (a man made feature).</div><div><br></div></div></div></div>