Library: GLG 120: Earth Science: Websites by geography

National data and mapping sites

American FactFinder: Census data and more.
Data and Statistics | USA.gov: Federal data and statistics. Find data and statistics by topic.
Data.gov: Portal for federal government statistics
EarthExplorer: from the US Geological Survey.
GeoCommons: GeoCommons is the public community of GeoIQ users who are building an open repository of data and maps for the world.
geo.data.gov
National Atlas home page
National Atlas Data Download
The National Map: Download topographical maps and much more
Policy Map via Temple: Interactive data mapping tool via Temple University. A full version can be found at policymap.com, where you can sign up for a free trial.
U.S. Board on Geographic Names: search domestic and foreign place names
USGS: Maps, Imagery, and Publications
Vox maps

Data Websites: Pennsylvania: sources of Pennsylvania data from Stanford University Libraries
Open Data Philadelphia: Access to more than 175 data sets, applications, and APIs related to the Philadelphia region.
Pennsylvania Department of Education
Pennsylvania Geological Survey: Digital Maps, Data, and GIS
Pennsylvania Governmental Agencies
Pennsylvania Spacial Data Access (PASDA): Clearinghouse of data from the state of Pennsylvania created by Penn State University
Pennsylvania State Data Center: from Penn State University
Pennsylvania Uniform Crime Reporting System

CIA World Factbook: Very basic international data and information to familiarize yourself with world nations
GEO-Portal: Browse data resources by societal benefit areas. Provided by European Space Agency
International Data - People and Households: International census data from the U.S. Census Bureau
UNdata
World Bank Data

American Panorama: An Atlas of United States History: Digital maps from the University of Richmond.
David Rumsey Historical Map Collection: 35,000 local, regional, national and world maps from the 18th and 19th centuries. Focus on the Americas, but includes maps from around the world.
Historical GIS: Historical GIS data from around the world
National Historical Geographic Information System: downloadable historic data
Perry-Castañeda Library Map Collection - University of Texas Libraries: thousands of historic and current maps from around the world