Data

* They report your location to other users, and they associate real-world locations (such as restaurants and events) to your location.

* Richer experience because relevant data changes with your location

* GPS chip uses satellite data to calculate exact position versus triangulation from cell towers to approximate position and is less accurate.

* Some geolocation systems use GPS and cell site triangulation (and in some instances, local Wi-Fi networks) in combination to zero in on the location of a device; this arrangement is called Assisted GPS (A-GPS)

* Most geolocation apps let you set a certain level of privacy, but you can never be too wary of people with bad intentions who may be following your updates. As a first step toward protecting yourself, it's a good idea not to expose your home address on these services.

* Privacy advocates have already gone to great lengths to raise awareness of the dangers of location sharing. One example is the PleaseRobMe.com Website (now retired), which aggregated tw eets with location data attached, to highlight the dangers of having thieves invade your home when you tweet a distant location.

* Twitter’s approach to geolocation, in contrast, lets you select whether to include your whereabouts for each individual message. Google Buzz does the same thing. Twitter also lets you delete your entire geolocation history, in case you change your mind and want to erase your tracks.

* A geolocation system is an information technology solution that ascertains the location of an object in the

* physical (geo-spatial) or virtual (Internet) environment. Most often, the object is a person who wants to utilize a

* service based on location, while maintaining his/her privacy. (ISACA, 2011)

* Geolocation data generally are used for three purposes:1

* • Geo-referencing or positioning—Ascertaining the physical location of an object or person relative to a coordinate

* system (map) to access...