Re: [OSM-talk] How to integrate a roundabout into a relation
Am Samstag 31 Januar 2009 10:32:04 schrieb Peter Vitt: Hello List, On talk-de we had a discussion about relations, especially routes, and roundabouts the other day. The topic was: How to integrate a roundabout into a relation. For now we have three different approaches: 1) Leave the roundabout untouched (closed way) and integrate it completely into the relation. 2) Leave the relation untouched (closed way) and _don't_ integrate it into the relation. 3) Split the roundabout as needed, integrate all parts of it into a dedicated roundabout-relation and only the needed parts into the route. 4) Split the roundabout as needed, tag all parts as junction=roundabout (don't use a roundabout relation), and add only the needed parts into the route. Regards, Marc signature.asc Description: This is a digitally signed message part. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] How to integrate a roundabout into a relation
2009/1/31 Peter Vitt pe...@dotnetphen.com: Hello List, On talk-de we had a discussion about relations, especially routes, and roundabouts the other day. The topic was: How to integrate a roundabout into a relation. For now we have three different approaches: 1) Leave the roundabout untouched (closed way) and integrate it completely into the relation. Applies when the whole roundabout is a part of the route, mostly when the route is for road users, 2) Leave the relation untouched (closed way) and _don't_ integrate it into the relation. Just wrong. 3) Split the roundabout as needed, integrate all parts of it into a dedicated roundabout-relation and only the needed parts into the route. A roundabout relation - what would be the point in this, it doesn't add much more to the data than can already be inferred from the tagging (junction=roundabout) and the topology of the ways. As far as we weren't able to make a decision I want some more input from the whole community, at best a description for the appropriate way to do it. Greets, Peter 2009/1/31 Marc Schütz schue...@gmx.net: 4) Split the roundabout as needed, tag all parts as junction=roundabout (don't use a roundabout relation), and add only the needed parts into the route. Sounds like the best option... -- Regards, Thomas Wood (Edgemaster) ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] How to integrate a roundabout into a relation
Marc Schütz wrote: Am Samstag 31 Januar 2009 10:32:04 schrieb Peter Vitt: Hello List, On talk-de we had a discussion about relations, especially routes, and roundabouts the other day. The topic was: How to integrate a roundabout into a relation. For now we have three different approaches: 1) Leave the roundabout untouched (closed way) and integrate it completely into the relation. 2) Leave the relation untouched (closed way) and _don't_ integrate it into the relation. 3) Split the roundabout as needed, integrate all parts of it into a dedicated roundabout-relation and only the needed parts into the route. 4) Split the roundabout as needed, tag all parts as junction=roundabout (don't use a roundabout relation), and add only the needed parts into the route. 5) Properly define a relation so that it does not need to know every single segment, but can 'work it out' from the normal rules. That is it only needs to pick up segments from the roundabout that fill in the gap on the segments it is following. So going north on a dual carriageway, only the north facing segments are traced, along with the correctly directed segments in the roundabout. A complex motorway interchange may have non-closed sections related to a roundabout junction, but if the routing does not require accessing the actual roundabout then it's segments will be skipped - but it still has to be part of the route relationship since one needs to know where you can join or exit the route? -- Lester Caine - G8HFL - Contact - http://lsces.co.uk/lsces/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] How to integrate a roundabout into a relation
On Saturday 31 January 2009, Lester Caine wrote: Marc Schütz wrote: 4) Split the roundabout as needed, tag all parts as junction=roundabout (don't use a roundabout relation), and add only the needed parts into the route. 5) Properly define a relation so that it does not need to know every single segment, but can 'work it out' from the normal rules. That is it only needs to pick up segments from the roundabout that fill in the gap on the segments it is following. So going north on a dual carriageway, only the north facing segments are traced, along with the correctly directed segments in the roundabout. That stops working in case of walking routes: where the marks are just on one side of the roundabout, and where hikers always take the same part of the roundabout whatever direction they're walking on that route. Number (4) is the only way everything works. Ben ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
