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It's not that they can't pull the information from the towers, it's that the information isn't very good. If you have a real GPS fix and you upload that fix to
by jmtulloss 17y ago
It's not that they can't pull the information from the towers, it's that the information isn't very good. If you have a real GPS fix and you upload that fix to Google along with the tower, they can start building a very accurate map of where what towers/APs are where. Then when somebody comes along that doesn't have a GPS fix, they can get a better fix than they could otherwise.
- huhtenberg 17y ago> it's that the information isn't very good. Tower-based cell tracking (triangulation based) generally has the precision of several meters if not better. That's more than enough for building very accurate map. Though there's a chance Palm is not allowed to access this information without a warrant, which would explain why they are using alternative collection methods.
- likpok 17y agoI've noticed that of friends with GPS-phones, the tower tracking is always horrendous. Generally it is enough to get you into the right part of the city, but not enough to do any real navigation with.
- eli 17y agoA few meters is the absolute best case. In a city, you've got to deal with buildings and structures. Outside a city, you often have to make do with fewer than 3 visible signals.