NOAA’s National Geodetic Survey (NGS) provides the framework for all positioning activities in the Nation. The foundational elements of latitude, longitude, elevation, and shoreline information impact a wide range of important activities.
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Classes and educational resources on scientific topics relating to geodesy.
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NGS defines datums to help align data and tools to transform coordinates.
Learn MoreImportant Updates:
NSRS Modernization Delay Message
Deprecation of the U.S. Survey Foot
Beta Release:
Leveling Projects Page
Passive Mark Page