CRISTAL Prototypes: In developing this CRISTAL application, the intention was to configure a system that would be appropriate for recording a range of cultural resources, from individual historic artifacts to urban historic structures or districts and rural cultural landscapes. The two prototypes developed to test the viability of the CRISTAL System included an application for a National Park Service site (Mount Rainier National Park), which was primarily a test of image management and information integration capabilities, and one for the management of information relating to the Vigna Barberini on the Palatino Hill (a major nucleus of Roman civilization) in Rome, Italy, which included a demonstration of image manipulation and processing capabilities. An additional study site was Poplar Forest, Thomas Jefferson's plantation near Lynchburg, Virginia. A major preservation effort is planned for this landmark, which exemplifies Jefferson's mastery of the classical style. The timeliness of the Poplar Forest project and the complexity of the preservation effort presented an opportunity to further test the parameters of the information system by tracking a restoration project over an extended period of time from conception to completion. As yet, this component does not represent a structured application of the CRISTAL System. Rather, it has served as a vehicle for exploring resource documentation, image analysis, and image processing issues. The concerns explored with Poplar Forest have been addressed through real-time video recording, dimensional analysis using planar (two dimensional) geometrical constructs, and 3-D graphics modeling. CRISTAL: Description CRISTAL: Mt. Rainier Prototype