For more information, please follow the link: Download and Cart.
Data from The National Map is free and in the public domain. We use the "Cart" and "Checkout" terminology in TNM viewer only as a tracking mechanism to maintain download statistics.
USGS has implemented delivery of staged data from The National Map that no longer requires custom clipping. Staged data has already been pre-packaged in tiles so users can download as much data as they want.
USGS has developed a ScienceBase Product Index API that will support calling our catalog of over two million staged data files.
Use the following procedures:  1) Use the Add Data tool in the Advanced toolbar in the upper middle of the map display.  2) Select KML/RSS and enter either a file or URL.
Digital elevation models (DEMs) are staged at resolutions of 2 arc-second in Alaska (about 60 meters north-south, and varies from 20-35 meters east-west), 1 arc-second (about 30 meters), and 1/3 arc-second (about 10 meters), and are available
To help in the transition of raster data to different file formats, a set of scripts is available for download at
An error may sometimes occur which times out the web browser after clicking on a download pop-up window. If you try refreshing, it may open the archive (.zip) file.
If you select too many product themes, such as every theme in the initial USGS Available Data for download selection box, you get this type of behavior where dropdown menus are hidden.