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Windows® Phone 8 Unleashed by Daniel Vaughan

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Wi-Fi Triangulation

Wi-Fi triangulation provides a middle ground between A-GPS and cell tower triangulation. Wi-Fi triangulation uses less power than GPS and can provide better accuracy than cell tower triangulation in some environments.

Wi-Fi location relies on a global location database of Wi-Fi networks and the ability of a phone device to detect Wi-Fi networks within its vicinity.

Wi-Fi triangulation works by detecting networks that are in range, measuring the signal strength of each network, and then triangulating the result using the Wi-Fi network location database.

Note

The Wi-Fi network location database is provided by the company Navizon; currently, no public API exists for accessing the data directly.

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