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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.

SRTM is an international project spearheaded by the National Geospatial-Intelligence Agency (NGA) and the National Aeronautics and Space Administration (NASA).

SRTM Publication

An edited version of "The Shuttle Radar Topography Mission, Rev. Geophys., 45, RG2004, doi:10.1029/2005RG000183" was recently released. Please go to the SRTM Bibliography for further information

SRTM Accuracy Report

JPL has released the full SRTM accuracy report. It's available in the SRTM Bibliography. A condensed version will be published in the March 2006 issue of Photogrammetric Engineering and Remote Sensing, which is devoted to SRTM.

SRTM V2 released

NASA has released version 2 of the Shuttle Radar Topography Mission digital topographic data (also known as the "finished" version). Version 2 is the result of a substantial editing effort by the National Geospatial Intelligence Agency and exhibits well-defined water bodies and coastlines and the absence of spikes and wells (single pixel errors), although some areas of missing data ('voids') are still present. The Version 2 directory also contains the vector coastline mask derived by NGA during the editing, called the SRTM Water Body Data (SWBD), in ESRI Shapefile format.

The data may be obtained through this URL: and go to the directory where both version 1 and version 2 directories may be found. Please read the appropriate documentation, also found in the directories.

Australia Data Release


NASA has released the SRTM data set for Australia, New Zealand, and numerous South Pacific islands. There are about 1200 data 'cells' in this release, each measuring one by one degree of latitude and longitude. They represent the final set of unedited data from the SRTM mission to be released.

As with the other SRTM data for regions outside the United States the new set is sampled at 3 arc-seconds, which is 1/1200th of a degree of latitude and longitude, or about 90 meters (295 feet). Because of persistent cloud cover many of the Pacific islands had previously been very poorly mapped, if at all.

The new data are available for download from the USGS EROS Data Center - see Public Data Distribution for details.

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