> > > My eTrex Vista from Garmin has two altimeters. One via GPS and > another via barometric pressure. Seems accurate within the indicated > range (less than 50 feet almost always, 18 feet regularly). I leave > the unit on my dash, or use it's optional handlebar mount on my > bicycles. > > A decent aneroid altimeter should easily handle sub-contours on a topo (20 feet on the old stuff, 10 on the new). A good altimeter will show you the altitude in feet... accurately. My dad had one that would show you the distance between the desktop and the floor. Jim |
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