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Various Data Sources
A multi-institutional open-source collaboration building a better way to find and share geospatial data
View, edit and use geographical data.
ArcGIS Living Atlas
Maps, apps, and data layers provided by the ArcGIS community to support your work.
ArcGIS Open Data
ArcGIS Online is an online, collaborative web GIS that allows you to use, create, and share maps, scenes, apps, layers, analytics, and data.
Social Explorer Professional
Create and save demographic maps and reports down to the U.S. neighborhood and street level using U.S. census data, the American Community Survey, and the Religious Congregations and Membership Study. Visually analyze and understand demography and social change throughout U.S. history. Also useful in developing an understanding of the census data is an e-book on the history of the census, Measuring America : the decennial censuses from 1790 to 2000.Tip: Start with the maps and tables.
Esri Data & Maps
Provides access to data layers from the Esri Data and Maps DVD set that you can download for use with your ArcGIS software. Layer packages require ArcGIS 10.1 or more recent.
Geospatial Data Gateway
One stop source for environmental and natural resource data.
TNM (the National Map) Download
USGS's interface for downloading data from the National Map
A source for population, economic, housing, and geographic information and data about the United States, Puerto Rico, and the Island areas. Includes information about income, education, insurance, employment, housing, poverty, veterans, and much more. Replaces American FactFinder
US Department of Housing and Urban Development (HUD) Local Level Data
Downloadable housing data at the county, place, census tract and block group level.
Data.gov increases the ability of the public to easily find, download, and use datasets that are generated and held by the Federal Government.
Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.
World Resources Institute: Resources
Maps, charts, data sets, infographics, and other visual resources about the climate, energy, food, forests, water, and cities.
Query and order satellite images, aerial photographs, and cartographic products through the U.S. Geological Survey.
Download free GIS data for almost any country.