What is a "Download Digital Elevation Models"? The Most Authoritative Explanation.

What is a "Download Digital Elevation Models"? The Most Authoritative Explanation.

What is a digital elevation model?

A Digital Elevation Model (DEM) is a representation of the bare ground (bare earth) topographic surface of the Earth excluding trees, buildings, and any other surface objects. DEMs are created from a variety of sources. USGS DEMs used to be derived primarily from topographic maps.

What is the 3D Elevation Program?

The 3D Elevation Program (3DEP) products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, and elevation source (lidar) and associated datasets. In 2020, Digital Elevation Models were migrated to the Cloud Optimized Geotiff (COG) format.

Where can I find elevation data?

Digital elevation data for the United States and its territories are available through The National Map Downloader. Click the “Help” link at the top of the page for detailed instructions on how to find and download data. There is a separate site for The National Map Services.

What is a digital model of a terrain?

A digital model or 3D representation of a terrain's surface created from terrain elevation data. EOSDIS Update—Summer 2020 Quarterly Newsletter is now online!

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