NASA's topography data offer essential measurements that help inform human planning, protect ecosystems, and explain Earth's land processes.
Digital Elevation Models, or DEMs, are three-dimensional models of the “bare earth” surface, showing elevation and topography without trees, buildings, or other objects. DEMs are important in many different applications, including predicting wildfire behavior, planning for ecological conservation, and creating realistic models of water flow and flood risk. DEMs are a synthesis of many ...
The Shuttle Radar Topography Mission (SRTM) payload flew aboard the Space Shuttle Endeavour during the STS-99 mission. SRTM collected topographic data over nearly 80% of Earth's land surfaces, creating the first-ever near-global dataset of land elevations. The SRTM payload consisted of two radar antennas, one located in the shuttle's payload bay and the other installed on the end of a 200-foot ...
NASA's Land Processes Distributed Active Archive Center (LP DAAC) released the NASA Shuttle Radar Topography Mission (SRTM) collection on . SRTM was the primary payload on the STS-99 mission of the Space Shuttle Endeavour, which launched , and flew for 11 days. NASA SRTM V3.0 has eliminated all voids with fill primarily from ASTER GDEM2 (Global Digital ...
Ocean surface topography is the height of the ocean surface from the geoid, or surface on which the Earth’s gravity field is uniform. While the ocean looks perfectly flat to us from the shore, waves, tides, currents, and variations in atmospheric pressure cause variations in sea surface height across the globe.
The Surface Water and Ocean Topography (SWOT) platform monitors Earth’s surface water, collecting data to contribute to the first global survey of the Earth's surface water.