21 Dec
2010
21 Dec
'10
11:57 a.m.
On Monday 20 December 2010 11:37 AM, jtd wrote:
On Sunday 19 December 2010 19:49:20 Rony wrote:
I have an application called Google Maps in my mobile ( Samsung Star ). I doub't if there is a GPS in my mobile. The application opens up with my current location as the default map. It has a tiny spot which indicates my location. I believe it uses some triangulation from the cell phone towers. I re-checked my location and it is off-set by about 60 to 70 meters.
This one uses the cell servers for triangulation and sends back a lat-lon co-ord to the cell. The tower sends time stamped sig, the phone rplies back and the backend server connected to the tower does the calc.
Hmm!
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Regards,
Rony.