[citation][nom]NatureTM[/nom]According to the quote, satellite GPS uses more data than WiFi or tower positioning. To me, this seems counter-intuitive. Can someone please explain?[/citation]
GPS information is given with what satellites you have in range, what their signal strength is, and coordinates. Through tower positioning, you get what towers are in range and an estimated set of coordinates. With GPS, you might have anywhere from 8 to 19 satellites in range, with more satellites giving a better location. With power positioning, you will get a maximum of 3 towers, giving a much broader location. GPS can nail down a location within about 10 feet. tower positioning will give a location within 250 feet, at best. My phone, when I'm at work, using tower positioning, will tell me I'm within a 2.5 mile radius of a certain tower, and that's the best I can get. With GPS, it can tell me which building I'm in.