Using this site:
Quick and easy access to every page and bit of information contained by this digital atlas is provided by means of two menu bars. The menu on the left hand side of the screen leads up to mostly textual information. The menu on the right hand side of the screen leads up to mostly geospatial information. Textual information is divided into logical topics (geographic aspects, drainage, watershed, environment, and population). Geospatial data is offered as formatted and designed maps ("image maps"), raw GIS data, and data derived for use in increasingly popular Google Earth software. The right hand side menu also gives access to relevant documents and web resources.