Figure 10. Universal Automatic Map Compilation Equipment 
used with substantially uniform sampling of the 
area in 2, 4, 8, 16, 32, 64 or 128 lines. The total 
frame scanning of 128 lines takes 20 milliseconds ; 
because a 10-millisecond measurement period is 
used during compilation, only every other line is 
used in exposing a given scene element for the 
orthophoto. 
PRODUCTION OF THE ORTHO- 
PHOTO AIMO ALTITUDE CHART 
A television-like reproduction of the small area 
under observation at a given time is created by 
displaying the ground scan (dX, dY), appropri 
ately scaled, on a flying-spot scanner with the 
instantaneous brightness controlled by the video 
obtained from one of the diapositives. This is 
centered at the similarly scaled ground position 
(X, Y) to expose the corresponding area on a 
sensitized film sheet used to create the orthophoto. 
The profiling operation ensures a complete cover 
age of the model area. A second flying-spot scan 
ner, similarly positioned but with its brightness 
controlled by the three-level contour interval sig 
nal from the computer, is used to create the alti 
tude chart. 
CHARACTERISTICS OF 
THE UAMCE 
Automatic map compilation devices require 
scanners to examine the stereo photographs, to 
produce an orthophoto, and to print an altitude 
chart. A positioning unit must be associated with 
each scanner. 
In Bunker-Ramo’s earlier device, the Automatic 
Map Compilation System, the two diapositives 
and single film sheet for the orthophoto and alti 
tude chart were mounted on a common carriage, 
whose position corresponded to the geographic 
area being examined. Thus, while fixed scanners 
and imaging lenses sufficed for the two outputs, 
the diapositive scan lenses had to be moved by 
servos under computer command to accommodate 
for parallax and camera-tilt displacements. This 
reduced the accuracy requirement of the large 
carriage, but limited the system’s application 
because of the restricted range of the lens servos 
used to remove parallax displacements. 
In the UAMCE, four identical tables with asso 
ciated flying-spot scanners, under command of 
the Bunker-Ramo Model 133 computer, are used; 
they provide virtually an unlimited amount of 
flexibility. The severe parallax displacements of 
strongly convergent photography, the distortions 
of panoramic photography, and a considerable 
range of output scales for a given input scale can 
be accommodated. Reducing the output scale 
makes it possible to automatically prepare mosaic 
orthophoto and altitude charts from contiguous 
stereo pairs. 
An artist’s concept of the UAMCE is shown in 
Figure 10. The four tables in the foreground can