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Bookmark or Share- Your Gateway to NASA Earth Observation Data | NASA EarthdataExplore Learning Resources. NASA’s massive archive of Earth science data are free and open to any user for any purpose—but accessing, analyzing, visualizing, and applying these data requires a certain degree of knowledge about Earth observation data and how it is collected and optimized.
- Digital Elevation/Terrain Model (DEM) | NASA EarthdataA digital elevation model (DEM) is a 3D graphic of the "bare earth" surface of land shown without trees, buildings or other objects. DEMs can be created using traditional topographic maps, modern light detection and ranging (lidar) data and other sources gathered by airborne and space-based instruments.
- New in CSDA: High Resolution Digital Elevation ModelsDEM derived from Maxar imagery. Credit: EarthDEM Project. NASA’s Commercial SmallSat Data Acquisition ( CSDA ) program and the Polar Geospatial Center (PGC) at the University of Minnesota released new, high-resolution, three-dimensional topographic maps of select areas of Earth.
- SRTM | NASA EarthdataUsed to gather topographic (elevation) data of Earth's surface, NASA's SRTM used interferometry.
- GeoTIFF | NASA EarthdataHowever, there is continued interest and demand for the GeoTIFF file format, mostly as a distribution format for satellite or aerial photography imagery and for other kinds of data such as Digital Elevation Model (DEM) data and Digital Ortho Quadrangle data. Status. OGC GeoTIFF 1.1 is an approved NASA Earth Science Data Systems standard.
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