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The USGS SRTM data is based on NASA's SIR-C instrument. It is available in at the following versions: Version 1 (2003–2004) is almost the raw data. [7] Version 2.1 (~2005) is an edited version of v1. Artifacts are removed, but voids are not yet filled. There are 1-arcsecond data over the US. [8]
Despite the high nominal resolution, however, some reviewers have commented that the true resolution is considerably lower, and not as good as that of SRTM data, and serious artifacts are present. [14] [15] Some of these limitations have been confirmed by METI and NASA, who point out that the version 1 of the GDEM product is "research grade". [16]
SWBD data covers the Earth's surface between 56° southern latitude and 60° northern latitude. It is distributed in ESRI shapefile format, divided into 12,229 files, each covering one 1°-by-1° tile of the Earth's surface. SWBD data is in the public domain and is made available online for free download by NASA.
This image uses high-resolution digital topography data from NASA's Shuttle Radar Topography Mission (SRTM) at JPL-Caltech . It is in the public domain in the United States. NASA shuttle
This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.
This image uses high-resolution digital topography data from NASA's Shuttle Radar Topography Mission (SRTM) at JPL-Caltech . It is in the public domain in the United States. NASA shuttle
This image uses high-resolution digital topography data from NASA's Shuttle Radar Topography Mission (SRTM) at JPL-Caltech . It is in the public domain in the United States. NASA shuttle
This image uses high-resolution digital topography data from NASA's Shuttle Radar Topography Mission (SRTM) at JPL-Caltech . It is in the public domain in the United States. NASA shuttle