[OSM-newbies] Consistently off tracks on second or third tracking

[Harald Kirsch]

Hi,

there is something I don't get: if I cycle some residential streets a
second or a third time, I often find that the track is consitently off
the street for a few meters, e.g. between 10 and 50 meters.

Now, if the GPS would produce a Gaussian error, I would expect a track
to zigzag left and right from an older track, but obviously this is not
the case.

Does anyone know how these errors come about? Is it a principle GPS
problem so that there is a consitent error depending on the satellite(s)
currently seen, or is it the device's (in this case Garmin) software
that smoothes out the Gaussian in such a way that the user gets a
straight track?

HaraldK.

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Harald Kirsch | pifpafpuf bei gmx punkt de