GPS-Based Speedometer Apps
Can't decide whether our odometer works with the bigger tires or not. Measured against mile markers, we're about 1/10 of a mile slow while the speedometer agrees with those roadside speed control gauges. I've tried a couple of GPS-based apps to measure speed and odometer readings. (Methodology: Set cruise on a flat road section, verify speed on app and track miles.) None of them agree with each other. Seems to me there are a few explanations. Could be the iPhone GPS isn't sensitive enough. Could be the error in the odometer reading is trivial or falls within the margin of error of the app or the phone's GPS. Could be the apps do something funky with their GPS readings. Any ideas or comments?
Life and baseball both sometimes are not fair, but it is how you play the hops that counts. —Scott Miller, NYT Sports