Wristwatch collectors out there?

mosesbotbol · 03-02-2011, 05:15 AM

Quote:

Originally Posted by markem

Altimeters are affected by atmospheric pressure. You need to recalibrate it any time the barometer moves much, etc. 100 feet is not much for an altimeter to be off. You need to have a solid place of known elevation for calibration within relatively short range of where you want the altimeter to read properly. You don't just set-and-forget an altimeter.

Do you know of a certified elevation near your house. I use to have a bike computer with altimeter built in. I found the "official elevation" of my driveway and would reset the altimeter each ride if it was off.

markem · 03-02-2011, 08:03 AM

Quote:

Originally Posted by mosesbotbol

Do you know of a certified elevation near your house. I use to have a bike computer with altimeter built in. I found the "official elevation" of my driveway and would reset the altimeter each ride if it was off.

yes, the official elevation marker for my subdivision is about 1 block from me.

ade06 · 03-02-2011, 08:49 AM

Quote:

Originally Posted by markem

yes, the official elevation marker for my subdivision is about 1 block from me.

Just curious, what do you all do with all of this information?

mosesbotbol · 03-02-2011, 09:34 AM

Quote:

Originally Posted by ade06

Just curious, what do you all do with all of this information?

If you set the altimeter, you can calculate current elevation or feet climbed within a timeframe.

markem · 03-02-2011, 10:46 AM

Quote:

Originally Posted by mosesbotbol

If you set the altimeter, you can calculate current elevation or feet climbed within a timeframe.

If you are just doing a bike ride or similar day activity, you don't need to set it. Just note the start "elevation" and all the other waypoints. The errors will cancel. If, however, you want to measure vs something like a topographic map, you need to set so that you have reasonable confidence in your mapping to the set reference that is the map.