Originally Posted by
tomato coupe
Yes, Garmin says that in their one sentence blurb. But, when you dig into it, it's a lot more complicated. You have to understand the nature of sensor calibration errors, the various contributions to GPS error, and how all those errors accumulate over multiple measurements.
All that doesn't make what Garmin said incorrect.
Originally Posted by
tomato coupe
The most accurate way to get is good number for the roll out is with GPS.
You don't know whether there's really any difference between using that and other methods. It's certainly easier.
Originally Posted by
tomato coupe
That's why the sensor cannot be better than GPS at distances greater than the distance used to determine the rollout.
Again, this is wrong. The GPS can have drop outs and doesn't account for elevation. And it might cut corners too.
And Garmin says otherwise.