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As of 2 April 2016, the entire catalogue of ASTER image data became publicly available online at no cost. [4] It can be downloaded with a free registered account from either NASA's Earth Data Search delivery system [5] or from the USGS Earth Explorer delivery system. [6]
SRTM Shaded Relief Anaglyph of Zagros Mountains. The SRTM was flown on an 11-day mission of the Space Shuttle Endeavour in February 2000. [1] This NASA image used Landsat data to texture-map the surface created using SRTM Elevation data. The Cape Peninsula and Cape of Good Hope, South Africa, are visible in the foreground.
A U.S. Department of State estimate from August 2022 is that 11,095,302 people (annually) fill Form DS-160 or Form DS-156 (and since DS-156 is filled only in exceptional cases, the majority of these would be Form DS-160) and that filling the form takes an average of 90 minutes per person. [6]
The National Elevation Dataset (NED) consists of high precision topography or ground surface elevation data (digital elevation model) for the United States. It was maintained by the USGS and all the data is in the public domain. Since the 3D Elevation Program came online, the NED was subsumed [1] into The National Map as one of its layers of ...
NASA Shuttle Radar Topography Mission (SRTM) Digital Elevation Model (DEM): These are bitmap files released into the public domain, compressed into zip file format, which contain the digital topographic data of a given region. The zone covered by the DEMs resulting from the SRTM runs from latitude 56° South to latitude 60° North. These files ...
SRTM data, being derived from radar, represents the elevation of the first-reflected surface—quite often tree tops. So, the data are not necessarily representative of the ground surface, but the top of whatever is first encountered by the radar. Submarine elevation (known as bathymetry) data is generated using ship-mounted depth soundings.
Demo map showing high-resolution SWBD coastlines. The SRTM Water Body Data (SWBD) is a geographical dataset (2003) encoding high-resolution worldwide coastline outlines in a vector format, published by NASA and designed for use in geographic information systems and mapping applications.
Originally named Landsat Data Continuity Mission from launch until 30 May 2013, when NASA operations were turned over to United States Geological Survey (USGS). [15] Landsat 8 has two sensors with its payload, the Operational Land Imager (OLI) and the Thermal InfraRed Sensor (TIRS). [16] Landsat 9: 27 September 2021: active: 3 years, 4 months ...