Sorry to break the threading,
Maybe it's an idea to allow users to specify an area where traces are outdated?
So when a junction is reconstructed a local user can place a bounding
box over that junction and all GPS points in that box are marked as
outdated (or deleted, or whatever). Maybe some extra safety needs to
be made by only allowing users active in the specific area to do this,
or only users who upload traces.
I can think of a few places in my immediate area where the older
('wrong') traces have the upper hand.
Rene.
> Maarten Deen:
>
> Simone Cortesi wrote:
> > On Tue, Jul 28, 2009 at 09:21, ?var Arnfj?r? 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 But there is no way to determine if a particular GPS track is outdated.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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