Hi,

My comments are inline.

On Sun, 2/21/10, Manish Agrawal <[email protected]> wrote:
> Internal receivers are able
> to use a
> technology called a-gps (which uses data from mobile towers
> in addition to
> satellites to triangulate).

If you have iPhone, then you have a technology that is even better than A-GPS. 
It is called Skyhook Wireless technology and it uses the Wi-Fi capabilities of 
a phone along with its GPS system and cell towers. The ability of Skyhook to 
glean the position information from 3 different sources makes it more accurate 
especially in places where satellite signals are weak. 
Nokia’s Ovi Store and Apple’s app Store both have applications based on Skyhook 
You can visit
http://www.skyhookwireless.com/howitworks/
and
http://en.wikipedia.org/wiki/Skyhook_Wireless
for more information.
The presence of additional technologies on a cell phone makes it even more 
useful than a stand-alone GPS navigation device.

>  I
> have used nokia maps
> with sighted assistance and they give turn by turn
> direction announcements
> that are just as good as wayfinder.

That's true, although Wayfinder's icons were most likely labeled. When you go 
into Talks Icons settings sheet, you can find direction related graphics 
labeled like Left turn, Right turn, etc.

> Not to mention Google
> maps (I am looking
> for a product that will give turn by turn announcements
> with Google maps).

TalkBack with Google Maps does that, but I’m digressing away from the phones 
under discussion.

http://www.youtube.com/watch?v=PQTtpigxpWw

Regards

"For once you have tasted flight you will walk the earth with your eyes turned 
skywards, for there you have been and there you will long to return."
~ Leonardo da Vinci


      



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