Originally Posted by
njkayaker
I've found nothing that indicates distance from a well-calibrated rotation sensor is less accurate (for the usage being discussed). Using GPS is easier (no calibration) and it's clearly "good enough" (generally).
The most accurate way to calibrate a rotation sensor is to use GPS to determine tire circumference. As a consequence, distance measurements based on the sensor will not be as accurate as those based on direct GPS measurements, if the distance is greater than that used for calibrating the sensor.