[OSM-talk] Garmin eTrex Vista Hcx

[Shalabh]

Mike, thanks for the response. I would like to clarify that the 150 metres
error is a (x,y) distance error. There is an additional altitude error of
around 70 meters.

Regards,
Shalabh

On Sat, Oct 31, 2009 at 9:51 PM, Mike N. <niceman at att.net> wrote:

> > 3. I parked my car near a village a day before, marked a waypoint.
> > The satellite error was at +- 5metres. Today morning, I came back
> > and marked another waypoint. This time the error was +-4 metres
> > but this waypoint is 150 metres off the earlier one. The car keys
> >were with me and I can vouch that my car does not move on its own. :)
>
>   I haven't tried to calibrate elevation, assuming the GPS altitude has a
> large error.   But I would have expected the altimeter correction to return
> to the same altitude after returning to the start point.   I actually see a
> 20-50 Meter error after a route of only a few hours.   I doubt that the
> barometric pressure had changed so much during my trip.
>
>
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