This is a digitally rendered geological USGS map from 1999 of Crater Lake - Oregon. Digital Elevation Data (DEM), obtained from the Shuttle Radar Topography Mission is processed and digitally rendered to create a highly detailed elevation profile (printed on a flat surface - note: these prints are NOT raised relief maps). Prints are available in various sizes. As these images are high resolution renders with a high level of detail, large prints on professional photographic paper, metal or...