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What is the National Geodetic Survey map?
Where can I find the National Geodetic Survey marks?
What is a survey marker used for?
Where can I find information about land survey marks set by the USGS?
Finding Survey Marks and Datasheets. NGS provides Information about survey marks (including bench marks) in text datasheets or in GIS shapefiles. Note some survey markers installed by other organizations may not be available through NGS. To learn more about survey marks, visit our Frequently Asked Questions (FAQs).
Most survey marks were set by the U.S. Coast & Geodetic Survey (now called the National Geodetic Survey ); information for those marks is available online. For further assistance, contact the National Geodetic Survey at 301-713-3242 or ngs.infocenter@noaa.gov .
The National Geodetic Survey (NGS) is a United States federal agency based in Washington, D.C. that defines and manages a national coordinate system, providing the foundation for transportation and communication, mapping and charting, and a large number of science and engineering applications.
Survey markers, also called survey marks, survey monuments, or geodetic marks, are objects placed to mark key survey points on the Earth's surface. They are used in geodetic and land surveying. A benchmark is a type of survey marker that indicates elevation ( vertical position ).
