[OSM-talk] ref in roundabouts

[Andy Robinson (blackadder-lists)]

Plenty of examples I've come across of roundabouts which are both named and
have a reference (similar to a motorway junction number). The roundabouts on
the Birmingham ringroad are a good example. The name tag doesn’t appear to
cause any problems but the ref tag does in that the renderers need to not
display the ref on a roundabout in the same way as they show the ref for a
normal highway. But these are all rendering issues, not problems with the
data.

cheers


Andy

>-----Original Message-----
>From: talk-bounces at openstreetmap.org [mailto:talk-
>bounces at openstreetmap.org] On Behalf Of Mike Collinson
>Sent: 08 October 2008 12:38 PM
>To: talk at openstreetmap.org
>Subject: Re: [OSM-talk] ref in roundabouts
>
>I also don't put a highway ref or name on a roundabout on the grounds that
>it is a junction of more than one road and, though perhaps "mapping for the
>renderer" so that they don't show up as labels. If the roundabout itself
>has a name, I put it on the way.
>
>Mike
>
>At 02:15 PM 7/10/2008, Simon Hewison wrote:
>>Content-Transfer-Encoding: 8bit
>>
>>On Tue, 2008-10-07 at 11:45 +0200, Celso González wrote:> Two options
>here:> -ref is the one or ones that are used in the highway> -ref is not
>needed at all>
>>I'd suggest that ref is not needed at all, unless the roundabout itselfhas
>one that is unique to itself. Quite often roundabouts are named. Iguess
>that some of them may have some official reference number as well.It
>shouldn't normally have either name, or reference of any of thejoining
>ways.
>>Any route describing software should pick up on junction=roundabout,
>andwork out which exit of the roundabout to describe the manoeuvre as,
>andideally what the signposts might say on that exit.
>>Of course, counting exits needs to count permitted exits - quite oftensome
>roundabouts have oneway roads joining them, if they're not leadingaway from
>the roundabout, you don't count them.
>>Some examples of roundabouts that might cause problems:
>>The Handy Cross Interchange, High
>Wycombe:http://www.openstreetmap.org/?lat=51.61291&lon=-
>0.76999&zoom=16&layers=B000FTF
>>A4 Wellington Street/A412 junction in Slough:Note: This is not grade-
>separated. Traffic going along the A4 is allowedto go straight over the top
>of the roundabout. The ways across the topof the roundabout are indeed part
>of the A4.
>>http://www.openstreetmap.org/?lat=51.50815&lon=-
>0.581066&zoom=18&layers=B000FTF
>>Then of course, there's got to be the obligatory roundabout
>withoneway=false. This one is the Magic Roundabout at Hemel Hempstead,
>butthere are others. At the moment, this one isn't labelled
>asjunction=roundabout.
>>http://www.openstreetmap.org/?lat=51.746358&lon=-
>0.47329&zoom=18&layers=B000FTT
>>-- Simon Hewison
>>
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