Chapter 16
Where Am I? Finding Your Way with Core Location
Every iOSdevice has the ability to determine where in the world it is using a framework called Core Location. There are actually three technologies that Core Location can leverage to do this: GPS, cell tower triangulation, and Wi-Fi Positioning Service (WPS). GPS is the most accurate of the three but is not available on first-generation iPhones, iPod touches, or Wi-Fi-only iPads; in short, any device with a 3G data connection also contains a GPS unit. GPS reads microwave signals from multiple satellites to determine the current location.
NOTE: Technically, Apple uses a version of GPS called Assisted GPS, also known as A-GPS. A-GPS uses network resources to help improve the performance ...
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