[Tagging] Proper Tag for Not-a-Roundabout
davefoxfac63 at btinternet.com
Mon Nov 7 16:09:35 UTC 2016
Second example: Which junction has priority? From a quick look on
Streetview all junctions appear to be light controlled.
Could you expand on what 'special instructions' the routing engine is
not able to issue?
On 07/11/2016 14:30, Daniel Hofmann wrote:
> Over at OSRM we're not only doing Routing on OSM but also Guidance for
> users once a suitable route is found. In order to make the user
> experience great and the instructions pleasant to use we differentiate
> 1/ Roundabouts
> Think: "at the roundabout take the nth exit"
> 2/ Roundabout Intersections
> These are roundabouts with up to four ways and turn angles which makes
> the turns obvious.
> Think: "at the roundabout turn left"
> 3/ Rotaries
> These are large and named roundabouts.
> Think: "at Meinplatz take the nth exit"
> 4/ Not-a-Roundabout (what this post is about)
> There are situations where one of the entering road has right of way,
> which disqualifies the scenario for being classified as a roundabout.
> The Wiki has a section on these Not-a-Roundabouts:
> > In all these cases, the key “junction” is not necessary at all. You
> need no special tagging.
> Most of these Not-a-Roundabouts have a note on them, telling users not
> to tag them as junction=roundabout as this is a common mistake. Here
> are two examples in Berlin:
> Kottbusser Tor
> As you can tell, for both of those situations the routing engine is
> not able to issue special instructions since there is no tag to parse.
> And parsing note tags for the occurrence of roundabout is not a
> solution ;)
> With the current situations of having note="don't tag as roundabout"
> pseudo-tags on most of those it would make sense to establish a proper
> junction=not_a_roundabout tag (tag is up for discussion) software can
> parse and make use of.
> What's your opinion on Not-a-Roundabout?
> Daniel J H
> Tagging mailing list
> Tagging at openstreetmap.org
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