gps altitude accuracy vs barometric altimeter altitude accuracy–someone confuse that a barometric altimeter is more accurate of what the GPS only is able to provide. or how much better is it compared to a GPS only reading based on your current location on a 24K TOPO of Garmin (which obviously has elevations built-in maps)
In absolute terms, the altitude readout of a GPS is FAR more accurate and stable OVER THE LONG TERM than barometric altitude.
But GPS altitude fluctuates pretty rapidly and over perhaps hundreds of feet an more on a …