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 …

The Leveling Projects Page allows users to obtain data (leveling height differences) and metadata along any level line which has been loaded into the NGS Integrated Database.

The stations are independently owned and operated. Each agency shares their GNSS carrier phase and code range measurements and station metadata with NGS, which are analyzed …

NGS's authoritative spatial data, models, and tools are vital for the protection and management of natural and manmade resources and support the economic prosperity and environmental …

Sep 30, 2025 · * required fields We may use your data for internal evaluations of OPUS use, accuracy, or related research.

Web service that distributes the geoid height of the NGS geoid models in a concise and portable way. The web service provides the geoid height (of a model specified by its model ID) at any …

Dec 7, 2023 · NGS defines the official geodetic datums for all federal mapping activities in the U.S. and its territories (see Table 1) as part of the National Spatial Reference System (NSRS).

NGS provides access to all NCN data collected since February 9, 1994 (1994:040). The data include observation, meteorological, navigation/ephemeris, station logs and NGS coordinate …

Acting NGS Director Shachak Pe'eri, along with NGS staff, presented a NOAA and NGS overview, a geodesy 101 primer, a summary of NGS field operations, and an introduction to …

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