how does google map determine locations for phones without gps

Posted by tomwu on Stack Overflow See other posts from Stack Overflow or by tomwu
Published on 2010-06-05T18:34:31Z Indexed on 2010/06/05 18:42 UTC
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google-maps

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geolocation

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gps

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maps

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cellid

http://www.google.com/mobile/maps/

Using this on phones without gps, the locatiosn can be obtained as well.

I am currently using the html5 geocoder/gear for obtaining locations. However this only works for iphone and android. BUt how does google map get the information from phones without this capbility?

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