“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…” […]

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

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”