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Originally Posted by BillB
How confident are you in the GPS being accurate? 1% off on the OEM odometer is a significant variance if this is an accurate measurement.
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GPS that's available to civilians (outside of commercial entities such as land surveyors) is not 100% accurate. I don't know what the variance is but, as far as I know, it is close enough for everything but bomb placement.
geotech could likely enlighten us on all of the variables in the world of GPS location but from what I recall when I was in the surveying business, the whole concept is very dynamic.