Core Location was designed to simplify the process of working with location by providing a set of APIs that facilitate location monitoring and various location-data conversions (such as latitude/longitude coordinates to human readable addresses and vice versa).
The Core Location framework is data oriented and can be used to obtain relevant location information as needed for check-in services, user tracking, nearby searches, and more.
Shawn Welch discusses i OS 5 enhancements to location services including forward and reverse geocoding, placemarks, and regions.
This object contains a determination of the latitude and longitude coordinates of the device as well as information about the accuracy of the determination.
The location manager also calculates speed and heading (based on the observed change in location), and likewise encapsulates it in the CLLocation object.
New to i OS 5 are enhancements to location services including forward and reverse geocoding, placemarks, and regions.
Core Location is a set of Objective-C classes built into the Core Services layer of i OS.
Only devices configured with a cellular radio (i Phones and 3G-enabled i Pads) are able to determine location through cell towers.