National Geodetic Survey

The National Geodetic Survey (NGS) is a U.S. government agency responsible for mapping and measuring the Earth's surface with high precision. It establishes and maintains a network of precise reference points called benchmarks, which help ensure accurate positioning for navigation, construction, mapping, and scientific research. Using advanced technology like GPS and satellite data, the NGS ensures consistency and accuracy in geographic data across the country. Its work supports activities such as land surveying, mapping, environmental monitoring, and infrastructure development, making it essential for safe navigation, land management, and scientific understanding of our planet.