NGS – National Geodetic Survey

National Geodetic Survey (NGS) is a federal agency within the National Oceanic and Atmospheric Administration (NOAA) responsible for defining, maintaining, and providing access to the National Spatial Reference System (NSRS).

NGS establishes and monitors the nation’s geodetic framework, including precise positioning, elevation, and shoreline data. Its work supports surveying, mapping, navigation, infrastructure development, hazard monitoring, and scientific research, ensuring accurate and reliable geospatial information across the United States.