What is a "Digital Elevation Model California"? The Most Authoritative Explanation.

What is a "Digital Elevation Model California"? 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.

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 the USGS 3D Elevation Program?

The USGS 3D Elevation Program (3DEP) is in the process of collecting high-quality lidar and IfSAR  (for Alaska) coverage for all of the United States and its territories.

Where can I find digital surface models?

Access global digital surface model (sign-up required). The global DEM is available from NASA Earthdata and EarthExplorer (linked at bottom of page). Find DEMs, raster, vector, remote sensing data for various planets and moons. Airborne Lidar, remote sensing, hyperspectral data available upon request.

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  A Beginner’s Guide to Digital Elevation Models (DEMs): Data Sources and More

  2023-03-22

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