<div dir="ltr">In Belgium and The Netherlands a network-relation is used to group together all nodes and routes of a walking network. This avoids that we have to repeat the name, operator, etc. on each route (signposted path between 2 nodes) and the nodes.<div>
<br></div><div>m.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jul 15, 2014 at 5:58 PM, Pieren <span dir="ltr"><<a href="mailto:pieren3@gmail.com" target="_blank">pieren3@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I discover that OSM contains 1575 relations of "type=network"<br>
(taginfo). I guess its definition is coming from this wiki proposal:<br>
<a href="http://wiki.openstreetmap.org/wiki/Relations/Proposed/Network" target="_blank">http://wiki.openstreetmap.org/wiki/Relations/Proposed/Network</a><br>
<br>
Quotes:<br>
"A network groups together routes that share common characteristics,<br>
e.g. a common operator, a common classification scheme (e.g. E-road<br>
network: "E 1", ..., "E 999"), ... "<br>
<br>
"Use cases<br>
<br>
Person A sees a bus route with number 217 and wonders how many other<br>
bus routes exist in that city.<br>
<br>
Renderer M wants to render all German motorways using white font on<br>
blue sign (official layout), and all E-roads with white font on green<br>
sign. This can be implemented by adding rules for 20614 (view, XML,<br>
Potlatch2, iD, JOSM, history, analyze, manage, gpx) and 20645 (view,<br>
XML, Potlatch2, iD, JOSM, history, analyze, manage, gpx).<br>
<br>
Renderer M wants to render all cycle routes that belong to the<br>
"D-Netz". However, there are a lot of other national cycle routes as<br>
well. "<br>
<br>
Plus some attached relations examples very explicite.<br>
<br>
As raised in the "discussion" page, is that not exactly breaking the<br>
"relations are not categories" ([1]) principle ? Can we delete such<br>
relations when we meet them ?<br>
<br>
Pieren<br>
<br>
[1] <a href="http://wiki.openstreetmap.org/wiki/Relations/Relations_are_not_Categories" target="_blank">http://wiki.openstreetmap.org/wiki/Relations/Relations_are_not_Categories</a><br>
<br>
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</blockquote></div><br></div>