Additional void filling of small areas used the GMTED2010 elevation model compiled by the US Geological Survey. ASTER is a sensor on NASA's Terra satellite that uses stereoscopic imaging to measure elevations via optical parallax where not obscured by clouds. Most voids are filled with elevation data from the ASTER GDEM2 (Global Digital Elevation Model Version 2). SRTM Plus uses SRTM Version 2 (see below) where the radar interferometric method was successful (not void). NASA has released a void-filled version of the Shuttle Radar Topography Mission digital elevation model, known as "SRTM Plus" or SRTM NASA Version 3. Void-Filled "SRTM Plus" Released (SRTM NASA V3) The image at left has data samples spaced every 90 meters (295 feet) the image at right has samples spaced every 30 meters (98 feet).Ĭredit: NASA/JPL-Caltech/National Geospatial Intelligence Agency Click on the image for a detailed comparison, including an animation
#FREECAD CONTOUR SHUTTLE MOVIE#
View the movie here.īelow, shaded relief images of deeply eroded volcanic terrain in northeast Tanzania demonstrate the improved nature of the highest-resolution SRTM data now being released. This fly around uses only SRTM data, shaded and with colored height. Indonesia, with many volcanoes, starting at Bali, flying westward over Java, and ending at Krakatoa (Pulau Krakatau). India and the Himalaya Mountains, with Landsat satellite images draped over SRTM elevation data. These additional fly around videos further illustrate SRTM elevation data: A fly around video of the Crater Highlands of Tanzania, using SRTM elevation data and Landsat images is available at. See the Africa image above and its caption at the PIA04965. The new data are available for download from the USGS EROS Data Center - see Public Data Distribution for details. (SRTM did not produce data for the northernmost latitudes or Antarctica.) See an index map of the newly available full-resolution data.
#FREECAD CONTOUR SHUTTLE FULL#
The new data have been released with a 1 arc-second, or about 30 meters (98 feet), sampling that reveals the full resolution of the original measurements. Previously, SRTM data for regions outside the United States were sampled for public release at 3 arc-seconds, which is 1/1200th of a degree of latitude and longitude, or about 90 meters (295 feet). Since then the schedule was accelerated, and all global SRTM data have been released. The announcement was made at the United Nations Heads of State Climate Summit in New York. On September 23, 2014, the White House announced that the highest-resolution topographic data generated from NASA's Shuttle Radar Topography Mission (SRTM) in 2000 was to be released globally by late 2015. Releases Enhanced Shuttle Land Elevation Data
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