ClubTread Community - View Single Post - negative elevation? (GPS question)

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post #14 of (permalink) Old 05-23-2008, 01:41 PM
OK Jack
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Join Date: Jan 2004
Location: Chilliwack + Osoyoos
Posts: 3,659
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OK... let me rephrase...

My GPS (an older Garmin 12) is set at NAD83... (as advised by Dr. Dru and Mr. Magnetite a while back, when I was trekking out Tamihi way and finding that the 49 th parallel ain't on the 49th !!! Now it is !!!)...

I like to set the "units" at Deg, Mins and Sec (decimilized), however, at the flip of a switch, I can get it in UTP etc, etc...
So yesterday, I took a bunch of (obvious) readings out at my place, like the corner posts, centre of roadway etc... And when I go to the RDOS map site (where the property survey plans are, and who use UTP coordinates) the readings are EXACTLY what they should be... Then when I go to GE, and "float" the mouse over the exact same corner post, I see it as the same, within the thickness of a mouse hair... LOL !!!

So I was probably wrong re GE's datum basis, but I'm happy that my GPS readings are within a millimeter (on my 19" screen) of where they should be...

Sorry about any confoosion...

OK'Jack...
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