Ulf Lamping wrote: >> What's needed here is not an immutable=yes tag but rather a couple of >> tags source=DEC and accuracy=definitive which will give GPS toting >> mappers the information they need to know that the data in OSM is likely >> to be more accurate that their GPS. They can then take an informed view >> about whether or not to mess with it. > > Sounds like a good approach. Having something like "You are about to > edit data that is probably more accurate (<Xm) than what you can achieve > with common GPS equipment. Are you really sure you want to change this?"
+1 from me too. With a positive, non-zero floating-point {number of
metres | dilution of precision} as an allowed value, perhaps.
Perhaps it should decay automatically to less accurate measurements if
people edit it with less accurate equipment. Quite how you assess how
accurate a given device, trace or vector is is left as an exercise for
the reader, naturally. And could be difficult since the OSMdb doesn't
appear to record any of that stuff...
--
Andrew Chadwick
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