Surely not?? How accurate can that be? I mean if i left my house and ran 3km (round trip) tracking south, and did the same again tracking north how would it know which way i went? Particularly if you turn around on each example and ran home the same way
Uh uh...you don't get off that easily: please specify which features you believe are not working.
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I suspect the magic is a combination of the accelerometer plus fairly complex algorithms for filtering out arm motion during the run. Add to that a known start and end position and maps with accurate roadways depicted and it should be able to make some pretty accurate guesses as to where you were (much like a vehicle nav system is still able to follow your route even if GPS is unavailable). A good test will be from users who run cross country as opposed to on well mapped roads.
Hmm the most obvious answer to me is wifi mapping. Anyone notice how your MacBook knows your location despite it having gps. Why couldn't the watch be doing the same thing? The watch could download the wifi DB of the general area around you when it has phone connectivity. Otherwise if it truly is all by gyro and accelerometer then that's amazing!!!