[RE-wrenches] GPS units

[jay peltz]

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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