Earth Resources Observation and Science Center (EROS)
This web site hosts an on-line repository for remote sensing and aerial photograpy initiated by the U.S. Department of the Interior and the U.S. Geological Survey.
Data Location: http://eros.usgs.gov/#/Find_Data
Data Available: Aerial Photography, Satellite Imagery, Elevation maps, Land Cover, Digitized Maps
Comments: EROS hosts all data retrieved from remote sensing units owned by the U.S. Department of the Interior. Most of the image frames are available free or for a minimal scanning/service fee. All LandSAT imagery is available free to download. Additionally, some prossesed images can be found through the website if you require data products acquired from remote sensing raw data. An interactive map search for location and date is available via the EarthExplorer.