The 90 m digital elevation models of the Shuttle Radar Topography Mission are generally available from the USGS’s Seamless Data Distribution page where users can specifiy an area on a map, then download the data. CGIAR Consortium for Spatial Information also provides SRTM data but in 5 degree tiles as geotiffs or ArcInfo ASCII files. No data holes have been filled through interpolation (as opposed to Viewfinder Panorama’s apporach of filling in missing data from other sources).

CGIAR-CSI’s focus is on “the application of Geographic Information Systems (GIS) and Remote Sensing (RS) for sustainable agricultural development.” No word on what CGIAR stands for.