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.
On 01/31/2013 02:12 PM, Bill Ricker wrote: > barometric altimeter isn't accurate enough for map making, but it's > FUN when driving or hiking through mountains. or harbor tunnels. > > all barometric altimeters must be calibrated to known altitude or > known sealevel pressure frequently for any absolute accuracy. -- --- m.v.g., Cartinus _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
