On 1/31/13, Cartinus <[email protected]> wrote: > The Garmins don't have a pure barometric altimeter. They combine the > height from the GPS measurements with the barometric pressure. They are > "auto calibrated" over a period of twenty minutes.
Based on recent experience, I am quite certain that is not true of older models e.g. 76csx, or if true, auto-calibration is not very accurate. The interstate tunnels under Baltimore Harbor should give me accurate indication of sea-level in-and-out if I started more than twenty minutes away with good sky view, and it was quite off. -- Bill @n1vux [email protected] _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
