How does turning on WiFi improve location accuracy when not connected to a network

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http://forum.xda-developers.com – So I'm in the car and I noticed that it says if I turn on WiFi it will improve location accuracy... how the heck does that work? Here's a screen shot. Notice the bottom card. Attachment 1453251 So yeah if anyone could tell me how this works, thanks :) Sent from my GT-N7000 using xda app-developers app Attached Thumbnails   (HowTos)