Bio
Dennis Crowley
Dennis Crowley is the co-founder of foursquare, a service that mixes social, locative and gaming elements to encourage people explore the cities in which they live.
Previously, Crowley founded dodgeball.com, which was acquired by Google in 2005. He has been named one of the "Top 35 Innovators Under 35" by MIT's Technology Review magazine and has won the "Fast Money" bonus round on the TV game show "Family Feud." His work has appeared in The New York Times, The Wall Street Journal, Wired, Time Magazine, Newsweek, MTV, Slashdot and NBC. He is currently an Adjunct Professor at NYU's Interactive Telecommunications Program.
Crowley holds a Master's degree from New York University's Interactive Telecommunications Program and a Bachelor's degree from the Newhouse School at Syracuse University.
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Encyclopædia Britannica Article
- Global Positioning System (GPS)
Precise satellite-based navigation and location system originally developed for U.S. military use. GPS is a fleet of more than 24 communications satellites that transmit signals globally around the clock. With a GPS receiver, one can quickly and accurately determine the latitude, the longitude, and in most cases the altitude of a point on or above Earth's surface. A single GPS receiver can find its own position in seconds from GPS satellite signals to an accuracy of one metre; accuracy within one centimetre can be achieved with sophisticated military-specification receivers. This capability has reduced the cost of acquiring spatial data for making maps while increasing cartographic accuracy. Other applications include measuring the movement of polar ice sheets or even finding the best automobile route between given points.
- Global Positioning System (GPS) on britannica.com
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