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I know how to use the "forward" and "backward" roles, but is there a rule for ordering the ways? For example, when there are one-way streets. When I download a relation as a GPX track with sections which are different in both directions, the track has several segments and is not compatible with my Garmin GPS. A solution would be to make 2 relations, one for each direction. This does not seem to be practiced on OpenStreetMap. |
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Cycling and walking route relations are not generally kept ordered in OSM. Users who require an ordered version can post-process the data. 2
When editing relations using JOSM, I try and sort the members, as it makes finding and filling gaps easier. It is very easy to miss a short section, such as steps or a footbridge, in an unsorted relation.
(25 Sep '12, 13:39)
srbrook
Thank you Richard. This is not a problem to order a relation when the signposted route uses the same road in the opposite direction. If you look at this relation as a GPX track, there are straight lines connecting the five sections where the route is different on the way back!
(26 Sep '12, 09:44)
bergamote
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In fact, I see three solutions:
(26 Sep '12, 09:44)
bergamote
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osm.org generally doesn't aim to provide data in a consumer-friendly format - it's principally a site for the use of mappers. Rather, we rely on third-party websites to do that. I would hope that, if there were enough demand, a third-party site would be established to supply route relations properly ordered in .gpx format. Certainly it would be wrong to impose an extra burden on mappers (or our hard-pressed tool authors) just to suit the needs of one particular group of users.
(26 Sep '12, 10:49)
Richard ♦
OK, now I understand. I asked for something that is not easy to implement. Anyway, a site like http://www.waymarkedtrails.org/ is excellent, but the downloadable tracks are not always usable on a GPS.
(26 Sep '12, 16:52)
bergamote
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What type of relation are you looking at? Public transport relations (and other strict linear features) are indeed ordered such that they form a continuous route. Types of relations that don't require strict ordering aren't necessarily ordered, by their very nature. 2
I'm particularly interested in biking and hiking relations. The problem is when a marked route does not use the same street in one direction for a short section. For example here. This is the GPX track.
(25 Sep '12, 08:28)
bergamote
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