5 天之前 · 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. A digital elevation model (DEM) is a 3D graphic of the "bare earth" surface of land shown without trees, buildings or other objects.

6 天之前 · Tracking terrain elevation is essential for understanding the forces that shape solid Earth and how human activity can alter the landscape. Terrain elevation data is often used to create digital elevation models (DEMs), which provide high-resolution depictions of the land surface and are needed to identify rapid or significant land surface changes.

The Advanced Topographic Altimeter System aboard the Ice, Cloud and land Elevation Satellite-2 collects elevation data over all surfaces spanning the world’s frozen regions, forests, lakes, urban areas, and more. Subsets of ATLAS/ICESat-2 data such as sea ice height, land and vegetation height, atmospheric layer characteristics, sea ice ...

NASA’s OpenAltimetry is a free and powerful map-based data visualization and discovery tool for exploring surface elevation profiles from the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) and ICESat platform mission altimetry data.

2000年2月11日 · Each SRTM radar assembly contained two types of antenna panels: C-band and X-band. C-band radar data were used to create near-global topographic maps of Earth called Digital Elevation Models (DEMs). Data from the X-band radar were used to create slightly higher resolution DEMs but without the global coverage of the C-band radar.

2023年10月5日 · ICESat (operational 2003 to 2010 with data available from 2003 to 2009) was the first in a series of planned missions to measure changes in ice sheet elevation and the heights of clouds and aerosols. It also provided topography and vegetation data around the globe, in addition to the polar-specific coverage over the Greenland and Antarctic ice ...

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.

Canadian Digital Elevation Data produced by Natural Resources Canada; 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 …

2021年3月1日 · SRTM obtained elevation data on a near-global scale using radar interferometry. Version 3.0 SRTM Global 1 arc second product is void-filled using elevation data from Advanced Spaceborne Thermal Emission and Reflection Radiometer ( ASTER ) Global Digital Elevation Model 2 ( GDEM2 ), USGS Global Multi-resolution Terrain Elevation Data ( GMTED ...

The Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) mission provides global elevation data using the Advanced Topographic Laser Altimeter System (ATLAS). With ATLAS measurements, ICESAT-2 provides detailed elevation information about many of Earth’s features, including ice sheets, glaciers, vegetation, clouds, oceans, and land surfaces. The