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Government agencies including local, state, federal, and international agencies make imagery available. The primary United States government sources of imagery both over the United States and worldwide are

 the USGS Earth Resources and Science Center (EROS) in Sioux Falls, South Dakota, which has an enormous archive of global satellite and airborne passive and active remote sensing data that is well organized, easily accessible, and mostly downloadable (http://eros.usgs.gov/find-data);

 the USDA Aerial Photography Field Office (APFO), which has an archive of aerial high-resolution photography and imagery collected over the United States by a variety of USDA and USGS government agencies (http://www.fsa.usda.gov/programs-and-services/aerial-photography/index);

 the NASA Distributed Active Archive Centers, which act as custodians of NASA earth science data and make it available to users (https://earthdata.nasa.gov/about/daacs);

 NASA, which also serves NASA data through its Global Imagery Browse Services (https://earthdata.nasa.gov/);

 NOAA’s Digital Coast, which archives and provides access to multiple lidar (both topographic and bathymetric) and multispectral airborne and satellite imagery data-sets collected primarily in the coastal areas of the United States (https://coast.noaa.gov/dataviewer/#/imagery/search/);

 NOAA Climate Data Online, which provides access to NOAA’s archive of worldwide climate and weather data (https://www.ncdc.noaa.gov/cdo-web/); and

 the Bureau of Land Management Aerial Photo Archive, a collection of aerial film at the National Operations Center in Denver, Colorado https://www.blm.gov/nstc/library/aerial/. Additionally, many states and local governments manage and serve image collections and make available their archives of both active and passive HVH-resolution imagery. Many of these image datasets can be found in ArcGIS Online.

Many national governments also collect and archive imagery. International sources of imagery are referenced in the relevant sections below.