A look at how Google does their maps

A quick article on how Google uses phone sensors along with many other things to give real time traffic updates to their users. By pulling the gps data when people use their maps app, they have the ability to guide people in different directions in accordance with traffic. Pretty cool!
http://arstechnica.com/gadgets/2011/02/calling-all-cars-measuring-traffic-using-cell-phone-data/

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