[OSM-talk] ref in roundabouts

Mike Collinson mike at ayeltd.biz
Wed Oct 8 12:38:26 BST 2008


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
>
>_______________________________________________talk mailing listtalk at openstreetmap.orghttp://lists.openstreetmap.org/listinfo/talk






More information about the talk mailing list