On Tuesday 12 April 2016, Paul Norman wrote: > > > > I am not sure here. For small airfields the aeroway=aerodrome > > feature is a fairly abstract thing essentially indicating only that > > this is a place where aircrafts start or land. This is not > > generally something that can be reliably determined from imagery. > > You can't reliably find small airfields from imagery, but I've found > it possible to verify a lack of airfields from it.
I agree this can be possible based on the considerations that it would be impossible to properly land an aircraft there (i.e. identification of the lack of possibility for an airfield to exist). But it should be made clear to the mappers that with something as abstract as an airfield the lack of positive indications for the presence of a feature is not generally sufficient basis for removing data without local knowledge or identifying the original source of the data, for example a certain import, as unreliable. For example i'd consider a stretch of road in a remote area that is frequently used for landing small aircraft a valid case of aeroway=aerodrome - likewise for a dry riverbed or lakebed, all of which will usually lack any visual signs for being used for this purpose unless an aircraft happens to be there the moment you look. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Talk-us mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-us
