[OSM-talk] Defective GPS trace

SLXViper SLXViper at gmx.net
Fri Jan 1 13:43:04 GMT 2010


Steve Bennett wrote:
> The trace looks like I was wandering through the grassy paddock, but I
> was actually following exactly that northern most "highway=path" in
> the bush. So it looks like the trace is incorrectly recorded something
> like 50m north of where I actually was. Now, since the discrepancy
> seems to go away on that track a bit further east (later
> chronologically), presumably the explanation is the GPS data is
> faulty. Is this common?

I've experienced the same from time to time. Seems to happen sometimes
with garmin devices... when you restart it, it's at the correct position
again.

> I'm new to GPSing, so I'm just surprised. It's a Garmin Oregon 550. Is
> there anything I can do to reduce, or at least detect, such errors?

Start your gps at a known position and look at the map. For eample when
you're standing near a road and your garmin tells you something
different, restart it.


best regards




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