They also use triangulation to known wifi hot spots, which is why you
get that message that your location accuracy will decrease if you turn
off wifi.
On 11/07/2013 12:26 PM, Kevin Minor wrote:
Hi Sieghard.
You're probably right about things like stores in a mall not being in
some GPS apps, but these apps use more than the satellites to get
their position. They use triangulation from several cell towers to get
a more accurate position. This is why you can get to within ten feet
or so to a location in a place like an airport, where the satellites
may be very difficult to receive. The Seeing Eye app does this, and
I'm sure other GPS apps do the same thing as well.
What I think will happen is malls will start producing apps, and when
you walk by a store it will vibrate your phone and alert you of items
for sale at the store, or perhaps even producing a coupon for the
store on the screen. To get these apps accessible to us VO users,
we'll need to tell the mall owners of our needs. This could benefit
us as blind users in a couple of ways. First, it gives us easier
travel in a mall. The second is people could realize that blind
people can be quite independent with the right tools.
Just my thoughts.
Kevin Minor, Lexington, KY
kmi...@windstream.net
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