Elevation - 40 of 39
Elevation FAQs - 39 Found
The area of coverage of any particular 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 the portions of Alaska where higher resolution lidar or IfSAR elevation sources exist. The 1/9 arc-second layer is available in the CONUS only where high-resolution, high-accuracy lidar or photogrammetric collections have been performed. The coverage of these higher resolution layers continually increases as new 3DEP-quality data are acquired.
The 3DEP product 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 Metadata web page.
- The 2 arc-second dataset covers the state of Alaska.
- The 1 arc-second dataset covers the conterminous United States, Mexico and Canada. It also covers Hawaii, areas of Alaska, Puerto Rico and the Territorial Islands of the US.
- The 1/3 arc-second dataset covers the conterminous United States, Hawaii, areas of Alaska, and the Territorial Islands of the US.
- The 1/9 arc-second dataset covers areas of the conterminous United States and limited areas of Alaska.
- The 1-meter dataset is available in limited areas of the CONUS but will increase in geographic coverage as additional lidar data are acquired.