Department Of Defense National Geospatial-Intelligence Agency

About the Author

The Department of Defense National Geospatial-Intelligence Agency (NGA) stands as a cornerstone of U.S. national security, delivering unparalleled geospatial intelligence to support military operations, policy decisions, and global awareness. Established through the merger of longstanding intelligence entities, the NGA harnesses advanced technologies in satellite imagery, mapping, and data analysis to map the world's terrain, oceans, and urban landscapes with precision. Its publications, such as U.S. Chart No. 1: Symbols, Abbreviations and Terms used on Paper and Electronic Navigational Charts, serve as vital resources for mariners, navigators, and professionals worldwide, ensuring safe and efficient passage across seas and skies. Through rigorous standards and innovative methodologies, the NGA continues to illuminate the invisible threads of geography that shape our world.