On 4/12/06, Anthony Townsend <[EMAIL PROTECTED]> wrote: > It's the FCC not the FAA, and my understanding is that none of the US > carriers are using tower triangluation (EOTD or other variants) because of > the cost of network upgrades. Instead they are pushing to cost to you, the > consumer, in the form of A-GPS equipped handsets. >
What is the status of offering the A-GPS information to 3-rd party developers? I've seen the JSR 179 Java interface, but I don't believe all phones with A-GPS support this. I think PlaceLab is using a similar interface, but again, not sure of how many phones that works on. Anyone else with experience interfacing the location information on equipped phones? Andrew > > [EMAIL PROTECTED] ([EMAIL PROTECTED]) wrote @ 4/10/06 9:35 AM: > > > I think this is a great question. I talked to a gentleman from South Africa > > last year at Where 2 who claimed to be a GSM expert. He said that GSM can > > locate you within something like 3 meters with no GPS support just using > > the towers, and that this was built into the GSM spec. He spoke of a case > > in South Africa where they located some sort of criminal using the GSM > > records. > > > > He said that CDMA on the other hand, cannot locate so precisely. > > > > So, to me, A-GPS was designed to make CDMA users locatable to the same > > degree as GSM. > > > > As an aside, does anyone know which type of cell phones are more lethal? > > > > Roger > > > > Original Message: > > ----------------- > > From: Ian | Urban Mapping [EMAIL PROTECTED] > > Date: Mon, 10 Apr 2006 01:42:23 -0400 > > To: [email protected] > > Subject: [Geowanking] E911 // cellular trilateration accuracy > > > > > > At the risk of asking (another) obvious question, I continue my naïve streak > > on this listservŠ > > > > > > > > I¹ve heard very different reports of how accurate cellphone tracking is‹the > > FAA mandates something like 50% of calls must be traceable to within a range > > of 30m but I¹ve heard some mobile pros say they¹ve heard of it getting as > > good as several feet. Obviously this varies depending on geography (urban, > > rural, topography), but does anybody have any idea how the US wireless > > carriers stack up? And how does this compare to phones with GPS? > > > > > > > > > > > > Ian White :: Urban Mapping LLC :: <mailto:[EMAIL PROTECTED]> > > [EMAIL PROTECTED] > > > > 120 West 45th Street 20th Floor :: New York NY 10036 > > > > Tel.212.242.8267 :: Fax.866.385.8266 :: www.urbanmapping.com > > > > > > > > > > > > -------------------------------------------------------------------- > > mail2web - Check your email from the web at > > http://mail2web.com/ . > > > > > > _______________________________________________ > > Geowanking mailing list > > [email protected] > > http://lists.burri.to/mailman/listinfo/geowanking > > _______________________________________________ > Geowanking mailing list > [email protected] > http://lists.burri.to/mailman/listinfo/geowanking > -- Andrew Turner [EMAIL PROTECTED] 42.4266N x 83.4931W http://highearthorbit.com Northville, Michigan, USA _______________________________________________ Geowanking mailing list [email protected] http://lists.burri.to/mailman/listinfo/geowanking
