A Boeing A160 Hummingbird drone. This rotor-based aircraft is capable of vertical take-offs and landings. The craft is affixed with the DARPA-developed ARGUS-IS imaging system -- which boasts a 1.8 gigapixel camera that can "track people and vehicles from altitudes above 20,000 feet."
Engineers build 50 gigapixel camera By synchronizing 98 tiny cameras in a single device, electrical engineers from Duke University and the University of Arizona have developed a prototype camera that can create images with unprecedented detail.
DARPA, the Defense Advanced Research Projects Agency, has just revealed its latest project, a gigapixel camera. The camera is capable of taking photos that are much higher resolution that the normal human eye can see. | Tech Jam
Gigapixel camera that takes high-resolution snapshots of entire body could be simple new tool for cancer screening Read more at: http://phys.org/news/2014-10-gigapixel-camera-high-resolution-snapshots-entire.html#jCp
From an altitude of 20,000 ft, DARPA's newest aerial surveillance camera, ARGUS-IS, can keep a real-time video eye on an area 4.5 miles (7.2 km) across down to a resolution of about six inches (15 cm).