CRISTAL: Mt. Rainier Prototype It was the graphical interface strategy that provided the structure for the development of an integrated resource information base for Mt. Rainier National Park. In this prototype application for the National Park Service, reference data pertaining to individual natural and cultural resources, such as statements of significance, descriptive summaries, and dimensional data, were stored in the system's worksheet environment (Kennedy and Staehli, 1985). These data fields were linked to other text files and to the image database through the Screen Map icons in the graphics environment. Macro sequences were developed to allow the user a high degree of discretion in visually interacting with (accessing and displaying) the information base. Image processing capabilities permit the system user to annotate and graphically manipulate individual images, and to overlay or combine component parts of various images to form a single integrated image that addresses particular diagnostic, analytical, interpretive, or prescriptive concerns. The information base can be classified (dissected) to an increasingly particular level of detail by implementing additional layers of icon activated worksheet menus. However many layers constitute the system structure, the user employs the mouse cursor to interact with the graphical prompts (icons) of the Screen Map to navigate the desired path through the contents of the information base. CRISTAL: Prototypes CRISTAL: Data Links CRISTAL: Graphical Interface CRISTAL: Interactive