4 ms·
Tower triangulation is really just not very precise (at the moment). If I'm in an area with no wi-fi networks and attempt to get my position without GPS, then
by bbatsell 17y ago
Tower triangulation is really just not very precise (at the moment). If I'm in an area with no wi-fi networks and attempt to get my position without GPS, then I'm given a pretty huge range of coordinates I can be in (at least a square mile). If I give it enough time, AGPS can kick in and get me closer, but if I am in range of a couple of wi-fi networks, I'm usually within 50-100 feet or so in a couple of seconds. The majority of APs seem to be in Skyhook nowadays. I understand why Skyhook can't be used for e911 — APs can move, or the information can be inaccurate from the start. So, in that respect, AGPS is more accurate, but not as precise. In my daily usage, precision is more important to me.