One of the biggest features of the new iPhone 3G is GPS. This includes live, updated tracking on Google Maps. There is even news today of TomTom preparing an app for the App Store.
“Our navigation system runs on the iPhone already,”
The GPS in the iPhone is not your normal GPS. With the iPhone you get A-GPS or assisted GPS. The iPhone uses it’s internet connection through the cell network to get information about where the sattelites are currently located and makes a faster connection.
Have you ever noticed that when in a building, GPS can’t get signal to the satellites. The iPhone 3G also uses the info from the cell phone towers and wifi routers to give you location information when GPS is not available. [Read more…]