A High Resolution Photoshop Terrain Background Image:
The Photoshop file with the "Background Relief Image" shows shaded relief terrain. This is a separate, linked high-res Photoshop image file, 300 ppi in 4-channel CMYK color. This Photoshop file can be opened and modified using and version of Adobe Photoshop. The CMY (Cyan, Magenta, Yellow) channels show the color tints, and the K (black) channel shows the hill shading. Each channel can be modified separately in Photoshop to give a wide variety of map styles and appearances.
With Adobe Illustrator Vector Map Line and Text Features:
The Adobe Illustrator vector file has all the area, line, and text features. Each class of feature is in a separate layer (all state borders in one layer, all river names in another layer, etc). All area colors and strokes are fully editable - all line specs are fully editable - and all text is fully editable font text (not outlines) so you can change font family, style, color, etc.