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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 …
NOAA CORS Network - National Geodetic Survey
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 …
OPUS: the Online Positioning User Service, process your GNSS …
Nov 17, 2025 · Process your GNSS data in the National Spatial Reference System
New Datums | National Geodetic Survey
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 …
Web Services | Data & Imagery | National Geodetic Survey
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 …
Datums and Reference Frames | Datums | National Geodetic Survey
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).
VERTCON 3.0 | Tools | National Geodetic Survey
VERTCON 3.0 release 20190601 is functionally implemented in NGS’s Coordinate Conversion and Transformation Tool (NCAT). Unlike earlier versions of VERTCON, VERTCON 3.0 …
National Geodetic Survey - GPS on Bench Marks Technical Details
NGS has developed a list of bench marks that provide the ideal spatial resolution for this transformation grid. Extensive analysis was performed on all bench marks currently in the …
Regional Geodetic Advisors | National Geodetic Survey
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 …
GNSS and GPS Data - NGS INFO - About Us - National Geodetic …
NGS supports surveyors and others with high-accuracy Global Navigation Satellite System (GNSS) data, ground control marks, models and tools, guidelines and tutorials.