Quote:
Originally Posted by hat_man
The way I'm seeing this is that Google maps rounds to the nearest tenth of a mile and GPS is to t he nearest hundredth?
So Google adds 528 feet to every mile but GPS only adds 50 feet. So for every 10 miles Google shows it's actually 11 miles? Sounds a little extreme to me. Unless I'm not understanding what you are getting at.
I can't imagine Google being 100 miles off for the 1000 mile trip I make to see my family in Myrtle Beach.

I think you are confused about the concept of rounding.
If I measure a trip that is actually 10.06764 miles to the nearest 0.1 mile, then I display this as 10.1 miles. And if I measure a trip of 1000.06764 miles to the nearest 0.1 miles, then it is displayed as 1000.1 miles.
But there is a certain amount of PRECISION in each measurement, so if the first trip was MEASURED as 10.06764 miles ± 1%, means that the ACTUAL distance could be as high as 10.783164 and as low as 10.569636 miles  and each would be displayed to the nearest 0.1 miles as 10.8 and 10.6 miles  where the second trip was measured 1000.6764 ±1% could ACTUALLY be between1010.683164 and 990.669636 miles and displayed to the nearest 0.1 miles as 1010.7 and 990.7 miles.
So a lot depends on the precision, not how it is displayed. I assume both Goggle Maps and GPS units have a fairly high amount of precision, but their display would read differently, but only barely different.