Hi William,
My GPS unit is accurate to about 10' on the barometric side.
Mine is Garmin Etrex summit
I use it all the time for hydro and water pumping.
jay
peltz power
On Jan 27, 2009, at 1:46 PM, William Miller wrote:
Jay:
Accurate enough to size water pumping systems. I imagine 3 meters
total, or +/- 1.5 meters. I don't need absolute measurements, just
relative between two points.
William
At 01:42 PM 1/27/2009, you wrote:
Hi William,
What sort of accuracy are you needing?
jay
peltz power
On Jan 27, 2009, at 1:34 PM, William Miller wrote:
Does anyone have a foolproof tool to measure elevation? I have
researched GPS units recently. They are notoriously inaccurate for
elevation:
http://wiki.motionbased.com/mb/GPS_Unit_Elevation
Here are few more links with GPS fundamentals:
http://www.adventurenetwork.com/cgi-bin/adventurenetwork/
GPS_101.html
http://www.gpsreview.net/electronic-compass/
I have a Suunto Observer watch with an altimeter. I think I can get
relatively accurate measurements of DIFFERENCE in elevation if I
measure the two elevations in quick succession. I will be trying
it.
William
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