What is the coverage of standard 3D Elevation Program (3DEP) DEMs?

The area of coverage of any particular standard 3DEP DEM product is generally determined by the availability of source elevation data of similar or higher resolution. For example, the 1/3 arc-second layer is available for only portions of Alaska where higher resolution lidar or ifsar elevation sources exist. The 1/9 arc-second layer is available only where high resolution, high accuracy lidar or photogrammetric collections were performed. Coverage of the higher resolution layer at 1 meter continually increases as new 3DEP quality data are acquired.

The 3DEP spatial metadata is the most current and reliable source for information regarding available coverage for each of the DEM layers described below. Spatial metadata may be downloaded from the 3DEP Product Metadata web page.

  • The 2 arc-second dataset covers the State of Alaska.
  • The 1 arc-second dataset covers the conterminous United States (CONUS), Mexico, and Canada. It also covers Hawaii, areas of Alaska, Puerto Rico and Territorial Islands of the U.S.
  • The 1/3 arc-second dataset covers the CONUS, Hawaii, areas of Alaska, Puerto Rico and Territorial Islands of the U.S.
  • The 1/9 arc-second dataset covers areas of the CONUS and limited areas of Alaska.
  • The 1 meter dataset covers limited areas of the CONUS but will increase in geographic coverage as additional lidar data are acquired.

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Where can I find a 3D Elevation Program (3DEP) DEM status map and get information on recent updates?

Status maps showing 3DEP product availability and recent updates can be found on the 3DEP Product Availability web page. Areas containing recent updates are refreshed on a monthly basis. Spatial metadata shapefiles showing the updated areas for each product are also available for download from the 3DEP Product Metadata web page. Product updates...

What is Lidar data and where can I download it?

Lidar data are available through The National Map Download Client . Click the “How To” link at the top of the viewer for detailed instructions on how to find and download data. Light Detection and Ranging (LIDAR) is a technology similar to RADAR that can be used to create high-resolution digital elevation models (DEMs) with vertical accuracy as...

Is there a difference between 3D Elevation Program (3DEP) DEM data and lidar data?

Yes, lidar data are represented as a cloud of variably spaced point locations (x,y,z) of any terrestrial target reflecting the laser pulse. In addition to bare-earth, the point cloud will typically include buildings, trees, towers, and powerlines. 3DEP DEMs are raster surfaces of bare-earth elevation values sampled at uniform horizontal increments...

How do I report errors in 3D Elevation Program (3DEP) elevation data?

If you think you’ve found an error please send an e-mail to tnm_help@usgs.gov . We will add the reported information to our "Digital Elevation Model Issues" data log for further analysis and possible correction. Spikes, pits, seam-line anomalies, and other data errors or blunders are of concern to us, and we are working to correct or minimize...
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Date published: October 30, 2018

USGS Topo Base Map Refreshed and Other Updates

The “USGS Topo Base Map” service named “USGS Topo” has been refreshed with new data and design changes. In addition, several of the “Data Availability”, or “Data Index” services have new cloud hosted URLs.

Date published: June 26, 2018

The 3D Elevation Program Distributing Lidar Data in LAZ Format

In support of ongoing efforts to provide efficient, cloud ready, open data formats for the use of lidar data, the USGS National Geospatial Program and its associated 3D Elevation Program is transitioning all of its lidar data distribution files to LAZ format by September 30, 2018.

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November 30, 2017

Majuro Atoll — Topobathymetric Model

This video is of is a three-dimensional (3D) view of the Majuro Atoll, Republic of the Marshall Islands topobathymetric model which consists of topography (land elevation) and bathymetry (water depth). This video shows the importance of high-resolution, detailed topobathymetric models because the highest natural elevation for the Majuro Atoll is only three meters. This

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excerpt of lidar imagery in Columbia Gorge
October 28, 2016

Lidar Image of Cascade Landslide Complex in Columbia Gorge

"Bare-earth" lidar image of the Cascade landslide complex in the Columbia Gorge, which includes the Bonneville, Red Bluffs, Crescent Lake, Carpenters Lake, and Hot Springs landslides.  A number of other landslides underlie the town of Stevenson, on the right side of the image.

video thumbnail: Elevation
April 30, 2012

Elevation

The National Elevation Dataset (NED) is the primary elevation data product produced and distributed by the USGS National 3D Elevation Program (3DEP). The NED provides seamless raster elevation data of the conterminous United States, Alaska, Hawaii, and the island territories. The NED is derived from diverse source data sets that are processed to a specification with a

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November 18, 2010

PubTalk 11/2010 — Silicon, Software, and Science

Monitoring the Earth's Landscape with Low-Cost High-Tech

by Rian Bogle, Remote Sensing Specialist

 

  • The USGS is one of the world's largest providers of remote sensing data, employing the best tools and techniques to expand our knowledge of the Earth.
  • Working with low-cost field and aerial imaging technologies,
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