On 07/12/15 19:20, Andrew Hain wrote: > But surely I can see no obvious harm in the presence of the relations. Also > searching the database by reference doesn’t always work, for instance not all > road segments tagged A1 in the UK are part of the road from London to > Edinburgh.
>>> >> http://www.openstreetmap.org/relation/103301#map=10/51.2112/-2.5578 The question is more one of what is the point of adding another layer of complexity that has to be maintained. The sample relation here has numerous gaps and parallel elements that make it simply a unordered list of elements. If any element on that list does not currently have an A37 tag then THAT needs to be fixed, and looking up all elements that are tagged A37 should reproduce the same list, but these will be different because currently elements of the A303 for example are incorrectly related as A37. The ONLY way to correctly identify the Route North and South is to trace the traffic path for each rather than randomly linking elements which route to other paths. Every time a component of the road system gets split then the relation also needs updating, but that may not be easy to verify while the new road network needs to be correct. If I want data on 'route' like A37 then the starting point is the ref tag and traffic direction rather than a messed up list of elements. -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk Rainbow Digital Media - http://rainbowdigitalmedia.co.uk _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
