- BLM National Home Page - The Bureau of Land Management administers 264 million acres of public lands, located primarily in the 12 Western States, containing natural, historical, cultural, recreational, and economic resources.
- CORS Data - Surveyors, GIS/LIS professionals, engineers, scientists, and others can apply CORS data to position points at which GPS data have been collected. The CORS system enables positioning accuracies that approach a few centimeters relative to the National Spatial Reference System, both horizontally and vertically.
- FGCS Federal Geodetic Control Subcommittee - Exercises government leadership in coordinating the planning and execution of geodetic surveys, in developing standards and specifications, and the exchange of survey data and technical information.
- Florida Geomatics - Outlines programs and national, state and local resource links for land surveyors.
- Geoscience Australia - The national agency for geoscience research and geospatial information.
- Land Surveying and Geomatics: U.S. Federal - Discussion of U.S. Government resources for professional land surveyors.
- National Geodetic Survey - Provides information and products related to the definition and management of the National Spatial Reference System (NSRS) - the framework for latitude, longitude, height, scale, gravity, orientation and shoreline throughout the United States.
- U. S. Naval Observatory - General information, FAQ, tour information, history, equipment information, inexpensive digital astro imaging, and instructions on constructing an 8 inch Dobsonian.
- U.S. Geological Survey - The U.S. Geological Survey provides the Nation with reliable, impartial information to describe and understand the Earth.
- www.resurvey.org - Privately supported site established as a reference for land surveyors working in the public land survey system.
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