Anonymous location pings
Location + speed sent periodically. Anonymized. Opted-in via 'improve location services'. No user identity leaves device.
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Anonymous location pings
Location + speed sent periodically. Anonymized. Opted-in via 'improve location services'. No user identity leaves device.
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Map matching
GPS is noisy. Match observed lat/lng to a specific road segment. Kalman filters + snap-to-road heuristics.