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Digital Elevation Terrain Model (DEM) | NASA Earthdata A digital elevation model (DEM) is a three-dimensional 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
NASADEM: Creating a New NASA Digital Elevation Model and Associated . . . NASADEM is a significant improvement over the available three-arcsecond SRTM DEM primarily because it will provide a global DEM and associated products at one-arcsecond spacing ASTER GDEM is available at one-arcsecond spacing but has true spatial resolution generally inferior to SRTM one-arcsecond data and has much greater noise problems that
New in CSDA: High Resolution Digital Elevation Models DEM 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
Create a DEM using Sentinel-1 Data | NASA Earthdata This recipe allows the user to create a Digital Elevation Model (DEM) product from two Sentinel-1 SLC scenes The user first creates an interferogram, and completes the appropriate phase unwrapping steps, then creates the DEM Pair Selection for DEMs ASF’s baseline tool may be used to
New Version of the ASTER GDEM | NASA Earthdata The first ASTER GDEM was released in 2009, with Version 2 being released in 2011 The ASTER GDEM Version 3 maintains the GeoTIFF format and the same gridding and tile structure as in previous versions, with 30-meter spatial resolution and 1°x1° tiles
Access to High-Resolution DEMs | NASA Earthdata The proposed SNWG-2020 activity would produce and distribute two 2 0 m DEM products: a near-Global Mosaic Earth DEM and DEM strips where new data was acquired for detailed change detection The Global Mosaic EarthDEM product would be updated annually when new data are acquired The DEM strips are at locations where Worldview collected stereo
SRTM | NASA Earthdata Used to gather topographic (elevation) data of Earth's surface, NASA's SRTM used interferometry
ALOS PALSAR RTC Project | NASA Earthdata Modified SRTM or NED DEM used for RTC processing in GeoTIFF format Incidence Angle GeoTIFF, indicating the angle in radians for each pixel Layover Shadow GeoTIFF, indicating where processing was impacted by layover or shadow Browse image in GeoJPEG format 1000 x 1000 pixels KMZ file with 30-m overlay Metadata in ISO 19115 format (xml file)