2025年1月23日 · A digital elevation model (DEM) is a 3D 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.

Today, we’ll show you how to find XYZ data and reach the summit of geospatial data greatness. Let’s dive into our list of 5 free global DEM data sources. 1. Space Shuttle Radar Topography Mission (SRTM) SRTM DEM data is being housed on the USGS Earth Explorer. To download, select your area of interest.

2023年9月9日 · From the towering Himalayas to the vast plains of Africa, these models provide invaluable insights for researchers, environmentalists, and map enthusiasts alike. If you’re eager to explore the world’s topography without a hefty price tag, here’s your definitive guide to the best free global DEM and terrain data sources available.

To narrow your search area: type in an address or place name, enter coordinates or click the map to define your search area (for advanced map tools, view the help documentation), and/or choose a date range.

As of July 23rd 2024, Opentopography is providing the DGED 2023_1 version of GLO-30 as downloaded directly from ESA (direct download instructions can be found here). The original gridded data from ESA is in geographic coordinates where the longitudinal cell spacing increases as a function of latitude for regions north of 50N and south of 50S.

The Copernicus DEM is a Digital Surface Model (DSM) that represents the surface of the Earth including buildings, infrastructure and vegetation. The Copernicus DEM is provided in 3 different instances: EEA-10, GLO-30 and GLO-90.

Have a look at the OpenDemSearcher map client on this website. For low resolution DEMs here is a great map client. Other sources, catalogues and lists for high resolution open DEM data: Please read the license carefully. Not all versions of a dataset might be available for free usage.

The Copernicus DEM is a Digital Surface Model (DSM) which represents the surface of the Earth including buildings, infrastructure and vegetation. This DEM is derived from an edited DSM named...

从网上找了很多种方法，都没法下载全球范围内的DEM，试验了好多网站，终于从NASA的Earthdata网站上找到了ASTER Global Digital Elevation Model V002的下载方法。 从邮件中找到你的下载链接，如上图所示，一个压缩包，这样就可以把所需的DEM全部下载啦。 从网上找了很多种方法，都没法下载全球范围内的DEM，试验了好多网站，终于从NASA的Earthdata网站上找到了ASTER Global Digital Elevation Model V002的下载方法。 下载网址： …

Digital Elevation Model (DEM) Download. Digital Elevation Model (DEM) widely known as a Digital Terrain Model (DTM). A DEM can be used to create topographic maps of overland terrain, as well as bathymetric maps. A DEM data can be represented as a raster dataset, or as a vector-based Triangular Irregular Network (TIN).