Looking at your first routing example, I'm failing to understand what
the problem is. As it's not a roundabout OSMR appears to be give clear
accurate information. Why would you want it to "issue special
instructions"? Are you asking us to add a 'this is not a roundabout' tag
to fool OSRM into thinking it's a roundabout?
I believe your second example is a roundabout
Dave F.
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
between
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:
http://wiki.openstreetmap.org/wiki/Tag:junction%3Droundabout#Not_a_roundabout
> 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:
Bersarinplatz
http://www.openstreetmap.org/way/288767318#map=19/52.51849/13.45355&layers=D
http://www.openstreetmap.org/directions?engine=osrm_car&route=52.51786%2C13.45348%3B52.51918%2C13.45281#map=19/52.51852/13.45327
Kottbusser Tor
http://www.openstreetmap.org/way/159155852#map=19/52.49898/13.41881&layers=D
http://www.openstreetmap.org/directions?engine=osrm_car&route=52.49915%2C13.41952%3B52.49857%2C13.41852#map=19/52.49896/13.41865
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?
Cheers,
Daniel J H
_______________________________________________
Tagging mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/tagging
_______________________________________________
Tagging mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/tagging
