Data Products

1. If you're interested in images and visualizations created from SRTM data, go to the Image Product Description page.
   
   
2. If you want to download SRTM data, those data are available at the US Geological Survey's EROS Data Center for download via File Transfer Protocol (ftp). Users should be aware that these data are intended for use with a Geographic Information System (GIS) or other special application software, and are not directly viewable in a browser. Also, users should be aware that the digital topographic data and images are unedited and are intended for scientific use and evaluation. They are outputs directly from the SRTM interferometric radar processor and, for example, may contain numerous voids (areas without data), water bodies that may not appear flat, and coastlines that may be ill-defined. The data are available from the USGS server at ftp://e0srp01u.ecs.nasa.gov. Data are also available through the USGS seamless server at http://seamless.usgs.gov/
   
   Please be aware, on Wednesdays, the FTP site is unavailable to the public due to scheduled maintenance. Also, the site has been very busy and may appear to be unavailable if too many users are downloading data. Please limit your download sessions so that others can access the data.
   
   
3. Recently, an updated version of the USGS GTOPO30 has also been released, with SRTM data used in place of the original data, when possible. This data set is also available on the ftp server and is found in the directory called SRTM30. Be sure to read the ReadMe and other text files; they contain important documentation.
   
   
4. Several new web sites have posted SRTM data in different formats than available at the USGS ftp site or the Seamless Server. Users may want to check the Global Land Cover Facility (http://glcf.umiacs.umd.edu/data/srtm/index.shtml) or the CGIAR Consortium for Spatial Information (http://srtm.csi.cgiar.org/) for SRTM data.
   
   
5. 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 by anonymous ftp to: ftp://e0srp01u.ecs.nasa.gov and moving to the directory srtm where both version 1 and version 2 directories may be found. Please read the appropriate documentation, also found in the directories.