<div dir="auto">The route ref tag on a roundabout is the logical extension of the route ref on any other road that is part of route with that ref number. <div dir="auto">The arguments for putting the ref in the route relation and not on the ways making up the route are valid along for roundabout that are part of route. </div><div dir="auto">Trouble arises if both the route members and the route relation carry ref tags and do not coincide. A classical is a roundabout that connects several routes. In that case the relation approach is clean, the "ref on the members" approach is problematic.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 23 Aug 2020, 18:54 Walker Bradley, <<a href="mailto:walker.t.bradley@gmail.com">walker.t.bradley@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div dir="ltr">In Afghanistan, there are continuous highways that have roundabouts as junctions. The roundabouts, also have the same Ref because they are part of the continuous highway. For an example check ref=NH0101 ref=NH0102 ref=NH0103 or ref=NH0104</div><div dir="ltr"><br><blockquote type="cite">On Aug 23, 2020, at 10:35, Mateusz Konieczny via Tagging <<a href="mailto:tagging@openstreetmap.org" target="_blank" rel="noreferrer">tagging@openstreetmap.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
<div><br></div><div><br></div><div><br></div><div>Aug 23, 2020, 15:23 by <a href="mailto:f@zz.de" target="_blank" rel="noreferrer">f@zz.de</a>:<br></div><blockquote style="border-left:1px solid #93a3b8;padding-left:10px;margin-left:5px"><div>On Sat, Aug 22, 2020 at 01:28:07PM +0200, Mateusz Konieczny via Tagging wrote:<br></div><blockquote><div>Aug 22, 2020, 12:17 by <a href="mailto:f@zz.de" target="_blank" rel="noreferrer">f@zz.de</a>:<br></div><div><br></div><div>> On Sat, Aug 22, 2020 at 12:09:14PM +0200, Mateusz Konieczny via Tagging wrote:<br></div><div>><br></div><div>>> I would expect roundabout to be split in parts where<br></div><div>>> ref is applying and parts where it is not applying, in other words<br></div><div>>> without any special handling and tag it as usual.<br></div><div>>><br></div><div>><br></div><div>> But the point is that on a roundabout the "name" references the name<br></div><div>> of the _roundabout_ not one of the streets connected to it. <br></div><div>><br></div><div>Yes<br></div><div><br></div><div>> Same should apply to ref as it will reference the Roundabout<br></div><div><br></div><div>why?<br></div></blockquote><div><br></div><div>1. How do you tag a reference number for a roundabout when suddenly<br></div><div>the ref contains a ref of one of the streets?<br></div></blockquote><div>Can you give example of roundabout with its reference number?<br></div><div><br></div><div>For now it feels like a theorethical excercise.<br></div><div><br></div><div>I never considered such case as I have never encountered or<br></div><div>heard about junction with its ref.<br></div><div><br></div><div>But there are named junctions, and I would look there for inspiration.<br></div><blockquote style="border-left:1px solid #93a3b8;padding-left:10px;margin-left:5px"><div>2. Inconsistency - Some informations on the roundabout contain<br></div><div>informations about itself, and some are just copied over from <br></div><div>attached streets.<br></div><blockquote><div>So it is about case where road has its own reference number<br></div><div>and junction has its own reference number, separate from<br></div><div>reference number of road routes?<br></div></blockquote><div><br></div><div>Yes - We should be consistent that an object carries informations about<br></div><div>itself and ONLY itself and not carry on some information of related<br></div><div>objects. To glue objects together or describe their relation <br></div><div>we typically use relations. We do this in Germany a lot - So primary<br></div><div>roads typically have relations carrying all road segments including<br></div><div>the roundabout. <br></div><blockquote><div>In Poland road route continues through roaundabout and roaundabout way<br></div><div>is part of such route.<br></div></blockquote><div><br></div><div>Correct - In Germany - at least for "Straßen NRW" thats the same. The<br></div><div>road surface of the roundabout is part of the Road through it. But<br></div><div>nevertheless - OSM has had a different Data Model to address/reference<br></div><div>roundabouts itself to be able to do landmark routing e.g<br></div><div><br></div><div>"Take 1st exit at the Hampstead Roundabout, then take the 2nd exit at<br></div><div>the Foobar Roundabout".<br></div><div><br></div><div>For this to work you have to put the information about the roundabout<br></div><div>itself somewhere. This has been documented for ages to be the<br></div><div>way carrying the junction=roundabout which has a name tag on its own.<br></div><div><br></div><div>So using ref on the roundabout for either the road, or a reference<br></div><div>of the roundabout breaks the assumptions that informations on the<br></div><div>junction=roundabout only refer to the roundabout. With this concept<br></div><div>it may sometimes refer to one or more roads which are connected to the<br></div><div>roundabout. This basically makes the information useless.<br></div><div><br></div><div>Flo<br></div><div>-- <br></div><div>Florian Lohoff <a href="mailto:f@zz.de" target="_blank" rel="noreferrer">f@zz.de</a><br></div><div> UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away<br></div></blockquote><div><br></div>
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