On Sun, 2016-11-27 at 10:21 +0100, Volker Schmidt wrote: > This is a complex issue. > Lets start from the end user's point of view: > > > Flight number XXxxx is sold by airline XX and goes from airport ABC to airport XYZ, possibly with scheduled intermediate stops at airport DEF (and possibly more). > > That flight is operated by the same airline or by another airline YY as flight number YYyyy. > > The actual flight route is not fixed, but is defined before departure by the flight's captain. > > > The flight route has to follow established flight corridors or tracks, which in turn are not fixed (for example the North Atlantic Tracks [1]). > > > So what can we map as geographic data in OSM? The airports and that's it. The "The way making up the route" is not mappable, because it is variable from instance to instance of the flight. > > > The only way out I can see, is to accept as "the way making up the route" > fictitious tracks connecting the airports on the shortest route. > > > (I know that we map already shipping routes, which have, in principle, similar problems.) > > > > Although shipping and ferry routes are mapped across open water and do not interfere with other mapping.
Imagine we added globe spanning ways linking airports, think of the problems that this will cause other mappers with no interest in air travel. The areas around major airports, such as Heathrow, will be covered in these ways. Imagine how much hassle this is going to cause a mapper who wants to trace houses, footpaths? This is a really bad idea. Phil (trigpoint)
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