Simone Cortesi wrote:
> On Tue, Jul 28, 2009 at 09:21, Ævar Arnfjörð Bjarmason<ava...@gmail.com>
> wrote:
>
>>> Does OSM invalidates GPS data after some time? Otherwise, roads
>>> continuously changes and after we will have a big cloud of points that
>>> don't make any sense.
>> No, it doesn't. GPX tracks stay where they are forever and continue
>> being served by the GPS API.
>
> anyway this is something that we might need to consider in the future.
>
> GPS are becoming more precise. older tracks are, on a general basis,
> less precise than actual ones. and road modifications will become more
> apparent as we progress.

But there is no way to determine if a particular GPS track is outdated. Sure,
you can look at the map and say "I don't see a physical road for this track",
but how would you identify GPS points of a track that is invalid? Especialy
for the anonymous tracks?

Maarten


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