I guess my concern is, do we have ANY source of LBS functionality
available to most users right now? Can tower data be retrieved from
most Palm and Windows Mobile 5 handsets? If so, are there any other
widespread grassroots/independent projects in action that uses this
data, that we can all contribute to?
I have some wireless and server resources that I could allocate to
collecting, storing, and disseminating tower cellid and lat/long
data, but I'd like to contribute to a somewhat active project instead
of starting my own from scratch. Any ideas, takers, etc?
Personally, I'm a Verizon customer, with EVDO/RTT and CDMA. I have
EVDO pcmcia cards that we use a lot, and EVDO/RTT/CDMA handsets.
Kevin
On Apr 12, 2006, at 4:00 PM, Kris Kolodziej wrote:
The GSM carriers have implemented the network-based e911/LBS
technology. However, they are finding that they’re not able to
launch any meaningful LBS apps using the EOTD method (e.g., ATT
failed miserably when they launched friend finder app in 2002).
So, they are seriously considering the AGPS solution.
Only Nextel’s iDEN phones offer open API to the GPS data. The CDMA
phones from Sprint and Verizon do not offer open API. The
developers have to go through a rigorous certification process.
Yes, PlaceLab is using the JSR 179 API, but mostly for non-cell
phone mobile devices like laptops or PDAs.
Btw, PlaceLab and other Wi-Fi based positioning systems are
featured in a new book, Local Positioning Systems: LBS Applications
and Services (see http://indoorLBS.com)
Regards,
K Kolodziej
http://indoorLBS.com
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:geowanking-
[EMAIL PROTECTED] On Behalf Of Andrew Turner
Sent: Wednesday, April 12, 2006 10:50 AM
To: [email protected]
Subject: Re: [Geowanking] Re: E911 // cellular trilateration accuracy
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
--------------------------------------------------------------------
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Andrew Turner
[EMAIL PROTECTED] 42.4266N x 83.4931W
http://highearthorbit.com Northville, Michigan, USA
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