Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The National Geospatial-Intelligence Agency (NGA) is an agency of the United States Government with the primary mission of collection, analysis, and distribution of geospatial intelligence (GEOINT) in support of national security. NGA was formerly known as the National Imagery and Mapping Agency (NIMA) and is part of the Department of Defense (DoD). In addition, NGA is a key component of the United States Intelligence Community.