knelson Posted November 21, 2005 Share Posted November 21, 2005 ...Mine read 14,379 atop rainier. Altimeter that hadn't been adjusted for a day read 12,800. Well THAT's not a fair fight now, is it?! Key to using altimeters: reset at known elevations at least once during the day, and usually when you get going in the morning. MY altimeter said 14,410 on the top of Rainier. Granted... I'd just reset it to that for the trip down since it's a pretty good "known" point! Quote Link to comment Share on other sites More sharing options...
Ed_Seedhouse Posted November 21, 2005 Share Posted November 21, 2005 Is sea level even sea level? I am not joking, this is a real question. It may or may not be. Sea level is different in different parts of the world. The Panama Canal must adjust for the difference in sea level on each cost, for instance which, if I recall correctly, is around 5 feet. All your gps can really measure directly is the distance between the gps and the sattlites, and by extension the distance between the gps and the center of the Earth. Your height above the geoid at your location may be quite a different thing, and any gps can only carry a more or less innacturate representation of the geoid. Ed Quote Link to comment Share on other sites More sharing options...
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