This image was created by Paul Pingrey.  He writes the following about the image:

"Art is an integral part of cartography. With Surfer the two become one. This image of Mississippi River bluffs was created by opening a USGS 10 meter DEM of the Genoa WI quadrangle as a wireframe map in Surfer 8. Only the Z (height) plot lines are drawn with a perspective projection selected in Surfer's property dialog. Some of the wireframe images from Surfer remind me of Japanese Sumi-e paintings."