The latest version of Google Maps and Google Maps for Mobile can use Wi-Fi to determine location information. The premise is similar to what Google does with cell tower information. The signals transmitted by nearby Wi-Fi access points are used to pinpoint location. Since the range of a Wi-Fi access point is smaller than that of a cell phone tower, this often results in a much more accurate position. The new feature works with BlackBerry devices for now, but support for the HTC G1 Android phone and other platforms will be added soon.
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