Originally Posted by
grahny
Motionbased has a feature that does some sort of adjustment when you upload. There's another feature you can turn on that adjusts even more (I forget what it's called). Personally, I don't think either adjustments are accurate at all. The unit readings are as close as you're going to get to actual IMO.
My guess is that the site does some sort of calculation differently, like using specs from the device compared to topo maps and things like that.
That's what I suspected. I also have a cyclocomputer on my bike which measures speed and distance based on wheel revolutions. Although the numbers it gave for time and distance differed slightly from both other sets of numbers, the max speed was much closer to the 37.7 figure than 44.3. I wonder if anyone else has more details as to what exactly the adjustment is that Motionbased performs?