Imagery

United States

• Aerial Photography Single Frame Records
• Arizona Regional Image Archive
• ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is an imaging instrument flying on Terra, a satellite launched in December 1999 as part of NASA's Earth Observing System (EOS). ASTER is being used to obtain detailed maps of land surface temperature, reflectance and elevation.
• Commercial Remote Sensing Space Policy (CRSSP)
• Digital Orthophoto Quadrangles (DOQs)
• LiDAR (Light Detection and Ranging)
• LP DAAC Data Pool: Hosts ASTER data covering the US and MODIS data covering the globe for free
• Microsoft Research Maps: Topographic maps, digital orthophoto quads (DOQ), and satellite images of the United States.
• Microsoft Terraserver: A large catalog of aerial photographs and remotely sensed imagery. This is not a comprehensive site. It does have some data for outside of the US.
• MODIS (Moderate Resolution Imaging Spectroradiometer) is a key instrument aboard the Terra (EOS AM) and Aqua (EOS PM) satellites. Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning, while Aqua passes south to north over the equator in the afternoon. Terra MODIS and Aqua MODIS are viewing the entire Earth's surface every 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths (see MODIS Technical Specifications). These data will improve our understanding of global dynamics and processes occurring on the land, in the oceans, and in the lower atmosphere. MODIS is playing a vital role in the development of validated, global, interactive Earth system models able to predict global change accurately enough to assist policy makers in making sound decisions concerning the protection of our environment.
• National Aerial Photography Program (NAPP)
• National High Altitude Photagraphy (NHAP)
• USGS Aircraft Scanners
• USGS Commercial Data Purchases (CDP)
• USGS Commercial Remote Sensing Data Contracts

International

• Advanced Very High Resolution Radiometer (AVHRR)
• Center for International Earth Science Information Network
• Center for Satellite Based Crisis Information: Presents a service of the German Remote Sensing Data Center (DFD) of DLR. It provides a 24/7 service for the rapid provision, processing, and analysis of satellite imagery during natural and environmental disasters for humanitarian relief activities and civil security issues worldwide. The resulting satellite-based information products are provided to relief organisations and public authorities and are also freely available on the ZKI website.
• Declassified Satellite Imagery - 1: Photographic imagery from the CORONA, ARGON and LANYARD satellites (1959 to 1972)
• Declassified Satellite Imagery - 2: Photographic imagery from KH-7 Surveillance and KH-9 Mapping system (1963 to 1980)
• Global Land Cover Facility (GLCF): "...the best open source for Landsat TM and Landsat ETM on the planet..." - Digital Terrain Modeling and Mapping Journal. In addition to Landsat imagery, GLCF hosts MODIS, AVHRR, and more.
• Hyperion and Advanced Land Imager (ALI)
• Landsat: An affiliate of the Tropical Rain Forest Information Center (TRFIC). Now hosts the Global Orthorectified Landsat Datasets for three epochs for free download: 1970's MSS, 1990's TM, and 2000's ETM+.
• National Center for Atmospheric Research (NCAR) Scientific Support Section
• Scientific Committee on Antarctic Research
• Shuttle Radar Topography Mission (SRTM)
• Spaceborne Imaging Radar C-band (SIR-C)
• USGS Atlas of Antarctic Research