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
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
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
海运中的滞期费 DEM 和滞留费 DET 分别是什么意思？ - 知乎 1、DEM（DEMURRAGE CHARGES）：滞期费 2、DET（Detention Charge）：拘留费 国贸程租业务中滞期费，就必然涉及买卖舍约。法院认为滞期费是因租船人不能在合同规定的装卸时间内完成装卸货的违约行为而由租船人支付的损害赔偿。在实务中，速遣费通常为滞期费的一半。
SRTM | NASA Earthdata Used to gather topographic (elevation) data of Earth's surface, NASA's SRTM used interferometry
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