(in WR Franklin → Research)

This is a 1970s algorithm and implementation for displaying 3D prism maps showing data depending on geographic regions by raising a prism above each region. The program preprocessed the 2D map in advance so that new data could be displayed, with hidden surfaces removed, quickly. Titles include:

1. . W. Randolph Franklin. IEEE Computer and Applications, 2(5):front cover and p. 4, July 1982. (invited).
2. . W. Randolph Franklin, Prism --- A Prism Plotting Program. In Mapping Software and Cartographic Data Bases, pages 75-79. , 1979.
3. . Wm Randolph Franklin and Harry R. Lewis. In Proc. SIGGRAPH'78, pages 70-75, Aug 1978. (paper).

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