Conclusions drawn from the data are the sole responsibility of the user.
The maps are based on USGS topographic maps that have been uniformly digitized, georeferenced, and otherwise modified by Wildflower. A key value added is elevation data. You may use the maps for your personal, internal business, or internal institutional use. You may not resell the maps nor use the maps in a publication that is for sale, resale, or that contains paid advertisements without obtaining a supplementary license from Wildflower. National Geographic acquired Wildflower Productions July 2000.