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National Geospatial-Intelligence Agency
The National Geospatial-Intelligence Agency (NGA) is both a combat support agency, under the United States Department of Defense, and an intelligence agency of the United States Intelligence Community,〔(U.S.C. Title 10, § 441 )〕 with the primary mission of collecting, analyzing, and distributing geospatial intelligence (GEOINT) in support of national security. NGA was known as the National Imagery and Mapping Agency (NIMA) until 2003.
NGA headquarters is located at Fort Belvoir in Springfield, Virginia, and operates major facilities in the St. Louis, Missouri area, as well as support and liaison offices worldwide. The NGA campus, at 2.3 million square feet (214,000 m2), is the third-largest government building in the Washington metropolitan area, and its atrium is spacious enough to hold the Statue of Liberty.〔(Top Secret America: An alternative geography )〕〔(BRAC side effect: Greener buildings )〕
In addition to using GEOINT for U.S. military and intelligence efforts, the NGA provides assistance during natural and man-made disasters, and security planning for major events such as the Olympic Games.〔(About NGA )〕 The NGA was credited by White House and military officials with providing valuable information in support of Operation Neptune's Spear on May 2, 2011, in which the United States military raided a secret compound in Abbottabad, Pakistan, and killed Osama Bin Laden.
==History==
U.S. mapping and charting efforts remained relatively unchanged until World War I, when aerial photography became a major contributor to battlefield intelligence. Using stereo viewers, photo-interpreters reviewed thousands of images. Many of these were of the same target at different angles and times, giving rise to what became modern imagery analysis and mapmaking.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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