[RE-wrenches] GPS units

[William Miller]

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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