“originally published by the United States Air Force in 1959. Last revised in 1984, it is now maintained by the National Imagery and Mapping Agency”

“As a surveyor, you have vast opportunities. You can map the world’s terrain. Explore new oil sources. Investigate crime scenes. Take charge as a CEO. Appear in court as an expert witness…” […]

NGS is developing models and working with other agencies to use the GPS data from the CORS network to make high spatial and temporal resolution maps of the ionosphere on a continental scale

GIS gain much of their power from being able to collate and cross-reference many types of data by location.

“World Wind allows any user to zoom from satellite altitude into any place on Earth, leveraging high resolution LandSat imagery and SRTM elevation data to experience Earth in visually rich 3D, just as if they were really there.”

A history of the relation of geology during the first 110 years of the U.S. Geological Survey to the development of public-land, Federal-science, and mapping policies and the development of mineral resources in the United States

from The National Geospatial-Intelligence Agency

GIS database download

using USGS maps to teach about Lewis & Clark

“Geodetic control is required to support mapping of the airports across the United States”