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RE: A free lunch with Edward Snowden
Well. That's call Offline map browsing. The blue dot works because the gps signal is working without internet.
Well. That's call Offline map browsing. The blue dot works because the gps signal is working without internet.
And the second point they know the koordinates of some wirelesshotspots and with that information google-maps can make some triangular-calc's even when your not connected with those spots.