Multimedia Gallery
August 30, 2006
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In a snapshot from a single carrier's network in Tampa, Fla., blue dots show active mobile phones.
In a snapshot from a single carrier's network in Tampa, Fla., blue dots represent all active mobile phones -- data sources for the IntelliOne system.
Credit: IntelliOne Technologies Corporation
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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