This free resource provides public access to data sets created by the federal government. Includes searchable catalogs that can be accessed in XML, Text/CSV, KML/KMX, Feeds, MLS, or ESRI Shapefile formats.
US Federal Technical Reports
TRAIL: Technical Reports Archive and Image Library Free Resource
The Technical Report Archive & Image Library is an ongoing collaborative effort to identify, digitize, archive, and provide free access to federal technical reports. TRAIL includes reports from agencies such as the Atomic Energy Commission, the National Advisory Committee for Aeronautics, the National Bureau of Standards, the US Geological Survey, and more. A complete list of the included series is available at http://trailguides.crl.edu/series
USGS Multimedia Gallery
A resource filled with images, videos, and audio recordings. All items in this gallery are considered public domain unless otherwise noted.
USGS Photographic Library
The USGS Denver Library Photographic Collection with access to over 30,000 photos taken during geologic studies of the United States.
University of Michigan Online Repository of Fossils
The University of Michigan Online Repository of Fossils (UMORF) is a project of the University of Michigan Museum of Paleontology to increase the accessibility of fossil specimens through online 3D and 2D representations.