Relief

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http://seamless.usgs.gov/ High Resolution Orthoimagery Downloads USGS is transitioning High Resolution Orthoimagery from state based web mapping services to a combined web mapping service. Also, delivery of the High Resolution Orthoimagery is transitioning from a dynamic (clip and ship user defined) to a tiled based standard product.

Seamless Data Warehouse

This is the SRTM home page. The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000. http://www2.jpl.nasa.gov/srtm/

Shuttle Radar Topography Mission

http://asterweb.jpl.nasa.gov/gdem.asp

ASTER Global Digital Elevation Map

ASTER Global Digital Elevation Map Announcement The Ministry of Economy, Trade, and Industry (METI) of Japan and the United States National Aeronautics and Space Administration (NASA) jointly announced the release of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model Version 2 (GDEM V2) on October 17, 2011.