On Sun, 18 Aug 2019 at 10:01, Sarah Hoffmann <lon...@denofr.de> wrote:
> > I have no issue if relations require reasonable processing to get to a > result > but I would like to see enough information encoded in the route relation > that > the processing invariably gets me to the result that the mapper intended. > I consider sorting and the use of roles essential for that. > So far we've only been talking of hiking/walking routes where some feel sorting is beneficial and others feel it is unnecessary. At the risk of derailing the thread, there are other types of route relation. Take bus routes. I know of a very complicated bus route. At three times along the route it drives into a cul-de-sac, reverses into a side-road of that cul-de-sac, then goes back the way it came. Those three places are not termini, they are merely points along the route where most of the passengers remain on board. In one part of the route it does a loop-the-loop, going around four sides of a square. It traverses other segments of the route twice, in the same direction, approximately 30 minutes apart. Oh, and it does the reversing-turn trick in another place that isn't a cul-de-sac, it just doesn't go any further along that road. It is perfectly possible to render the route. Trying to figure out the steps in the route from the rendered route is pretty much impossible, although detailed inspection of the one-way markings eliminates several possibilities. We don't (as far as I know) have any tool comparable to uMap that would allow ordinary users to step through the route so they can comprehend the details, although splitting the route into sub-relations would allow uMap to give a crude approximation of that capability. But one day such a tool might appear, at which point having the route sorted would be beneficial. Here is the route: https://www.openstreetmap.org/relation/8592409#map=14/52.0860/-4.6643 Good luck figuring out where it goes, even though the list of ways is (I think) correctly sorted. On the public transport layer you wouldn't even get the list of ways unless you queried the route. So maybe sorting isn't absolutely necessary, but it can make life easier. Maybe we shouldn't ever insist that mappers sort the routes they add, but I don't think we should discourage them if they want to put in that effort. Especially if, one day, somebody comes up with a step-by-step tool for displaying routes. -- Paul
_______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging