Currently two complete maps are available. The original map is version 1.0 and shows coastlines, boundaries, and rivers.
Elevation is shown by color bands with the topography shaded within each band.
Version 2.1 uses a continuous color shading and has more subdued colors. Coastlines and boundaries are also more subdued. Rivers are not shown on version 2.1. 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.