Digital Elevation/Terrain Model (DEM) | NASA Earthdata
2 天之前 · 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.
我想下载且只想下载某个省份的DEM数据，该如何下载? - 知乎
另，此dem数据为30m精度的数据，即：aster gdem 30m 分辨率数字高程数据。 广东DEM 另，如果需要3D效果需要用到ArcScene进行操作，简单制成下图的效果的可参考下面了解进行学习。
NASADEM: Creating a New NASA Digital Elevation Model and …
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 ...
到底什么是DEM？如何获取该数据？ - 知乎
DEM means digital elevation model.但是到底什么是数字高程模型呢？其数据是如何获得的？通过遥感解译
New in CSDA: High Resolution Digital Elevation Models
2021年12月7日 · 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
2024年12月3日 · 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
2020年11月4日 · 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.
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 ...
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
2000年2月11日 · Used to gather topographic (elevation) data of Earth's surface, NASA's SRTM used interferometry.