As some members of the Supreme Court recognized last year when they considered the use of only a single stream of data -- GPS location -- creating a life stream of data points paints a mosaic picture of a person's actions and habits.

CNN: Google Glass, the beginning of wearable surveillance

The company receives streaming location data from mobile phones in real-time, processes the data in the context of billions of historical data points, and analyzes it to better understand human activity.

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