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TIGER (Topologically Integrated Geographic Encoding and Referencing) is a format used by the US Census Bureau to describe physical and cultural features and areas in the US. TIGER data is available for free and can be used for maps and analysis with GIS software.
A comprehensive list of global and regional GIS data sources and geoportals for various themes and purposes. Includes links, descriptions, and categories of data providers and datasets.
The 2020 U.S. census was the 24th decennial census of the population and housing in the United States. It recorded a resident population of 331 million and determined the number of seats for each state in the House of Representatives and the Electoral College.
Learn about the definition, history, and applications of geographic information systems (GIS), which are integrated computer systems that store, manage, analyze, and visualize geographic data. GIS is a subdiscipline of geography and a branch of technical geography that relies on spatial analysis and location as the key index variable.
The National Map is a collaborative effort of the USGS and other agencies to provide geographic base information for the United States. It includes orthoimagery, elevation, geographic names, hydrography, boundaries, transportation, structures and land cover data.
Web GIS is a subset of Internet GIS that uses the World Wide Web to store, visualize, analyze, and distribute spatial information. Learn about the origins, functions, and examples of Web GIS, such as web mapping, web feature services, web processing services, and web coverage services.
Learn about the agency that produces data about the American people and economy, its legal mandate, data collection, history, and uses of census data. Find out how the Census Bureau conducts the decennial census and other surveys, and what regions and divisions it covers.
The USGS is a federal agency that studies the geology, biology, hydrology, and natural hazards of the U.S. and beyond. It provides maps, data, and research on topics such as earthquakes, volcanoes, coasts, minerals, water, and climate change.