CAPTIONS FOR ILLUSTRATIONS 
Figure 1. Annotated mosaic of alternate routes for relocation 
of U. S, Route 21 in Ohio. Original scale 1” = 800 ft. 
The center line profile was obtained from existing USGS 
topographic maps. Courtesy of Ohio Highway Department. 
Figure 2. The Terrain Data Translator. This device auto- 
matically records center line offsets and terrain elevations 
for cross sections. Courtesy of Benson-Lehner Corporation. 
Figure 3. The Electroplotter Model H. This instrument reads 
x y coordinates from computer cards or tape. It auto- 
matically plots the points and connects them with 
straight lines. Courtesy of Benson-Lehner Corporation, 
Figure 4. Printed output from earthwork computations. Courtesy 
of Photronix, Inc. 
Figure 5, Block diagram for a completely integrated photo- 
grammetric-electronic highway design system. Courtesy of 
Photronix, Inc. 
Figure 6. The Stereomat. This instrument provides automatic 
relative orientation, contouring, and profiling. Courtesy 
of Benson-Lehner Corporation. 
Figure 7. The reading head of the Integrated Mapping System. 
The platen is used for visual observation of terrain 
elevations during profile storage. It is then replaced by the 
Vidicon which transmits a rectified image to the Ortho- 
photoscope. Courtesy of Fairchild Camera and Instrument 
Corp. 
Figure 8, Highway design computed from Digital Terrain Model. 
The plan, profile and mass diagram are plotted and 
annotated automatically. Courtesy of Massachusetts 
Institute of Technology, Massachusetts Department of Public 
Works, and U. S. Bureau of Public Roads. 
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