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tube. The display tube can be photographed on a line-by-line basis; 
the resultant photograph will be an orthophoto with superimposed con 
tour lines . 
With a larger flying spot scanner tube and a stereoplotter de 
signed to project all of the stereomodel on the scanner tube surface / 
an almost completely automatic system can result. When one elevation 
is contoured, the scanner tube can be automatically raised to the next 
level. If desired, much of the orientation process can be automated 
using the same correlator circuits which are in use in locating and trac 
ing contours. 
As instrument C factors are improved, the Stereoplotter will be 
able to compete economically with most manually operated stereoplotters. 
Given larger, high-resolution, flying spot scanner tubes, it is possible 
to produce contoured orthophoto maps to system C factors of 1000 to 1500 
within minutes with the Stereoplotter, Projection AP-14. As other types 
of automatic plotting equipments are developed and perfected, much of 
the bulk mapping done by the government agencies of most countries will 
be done automatically. The stereoplotter operator will still be required 
to complete the map. He will monitor the operation of several automatic 
plotters, and fill in those areas where human judgment and experience 
have not yet been automated. 
ACKNOWLEDGMENT 
The Stereoplotter, Projection AP-14 was developed under the 
direction of the U. S. Air Force, Rome Air Development Center. The 
work was capably guided by Mr. Joseph Diello of R.A.D.C., whose 
technical suggestions as to system configuration and instrume ntation 
contributed greatly to the success of the present equipment.