Both maps show an amazing amount of detail, showing the geomorphology of the U.S. as seldom ever seen. In version 1.0 each color band covers an elevation range of 1000 feet. The total space needed for the 60 images is 8.1 Mb for version 1.0 and 11.7 Mb for version 2.0. Both maps cover the range 65 to 125 degrees West longitude and 25 to 50 degrees North latitude. Individual GIF images cover a 5 deg by 5 deg area.
Some images are blank but are included for completeness.
Each image is 656 by 800 pixels with the map area covering 550 by 694 pixels. This area may be cut out and pieced together to form larger areas or to better show areas near image boundaries. The image files are named as follows. The area size is included so that in the future images covering specific areas of interest may be included. Version 2.0 names are the same except for a v2 before .gif.