Digital Elevation/Terrain Model (DEM) - NASA Earthdata
Sep 30, 2025 · NASA's data for digital elevation models (DEM) comes from airborne and space-based sources and are useful for analyzing a majority of Earth's terrain.
NASADEM: Creating a New NASA Digital Elevation Model and …
We propose a significant modernization of the publicly- and freely-available DEM data. Accurate surface elevation information is a critical component in scientific research and commercial and …
到底什么是DEM？如何获取该数据？ - 知乎
DEM，Digital Elevation Model，DEM，数字高程模型，是描述地表起伏形态特征的空间数据模型，目前可以免费下载到的全球DEM数据主要有SRTM、HGTNASA、AW3D30、TanDEM-X …
ASTER Global Digital Elevation Model V003 - NASA Earthdata
Description The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global …
New in CSDA: High Resolution Digital Elevation Models - Earthdata
Dec 7, 2021 · High-resolution Digital Elevation Models (DEM) for non-polar regions at two-meter spatial resolution are now available through NASA’s Commercial SmallSat Data Acquisition …
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 …
New Version of the ASTER GDEM | NASA Earthdata
Nov 4, 2020 · Version 3 of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) is now available from NASA’s …
Shuttle Radar Topography Mission (SRTM) | NASA Earthdata
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 …
NASADEM Merged DEM Global 1 arc second V001 - Earthdata
Feb 13, 2020 · Description The Land Processes Distributed Active Archive Center (LP DAAC) is responsible for the archive and distribution of the NASA Making Earth System Data Records …
Alaska Satellite Facility's Radiometric Terrain Correction Project ...
The creation of radiometric terrain corrected (RTC) products was a project of the Alaska Satellite Facility to make SAR data accessible to a broader community of users. RTC removes the …