DIGITAL TECHNIQUES FOR MAP COMPILATION 
239 
Summary of DAMC System Component Test 
Component Functional Requirement Performance How Obtained 
Photo-digitizer Model Area (half section) 
Traverse Speed 
Point Measurement Error 
Scan Time (4.5"X4.5") 
Digitizing Range 
Density Range 
Spot Positional Accuracy 
Spot Interval 
Signal-Noise Ratio 
4i'X4i' 
0.9 inch/min 
2 micron (rmse) 
5 minutes 
8 shades 
64 shades 
0.04-0.80 
92% within 5 spot 
68% within 1 spot 
2.5 mil 
40:1 
25:1 
WILD Stereocomparator 
Stereocomparator 
Stereocomparator 
Automated 
Scan Mode 
Record Mode 
CRT-PMT Scan 
F-line 
X-scan 
X and V 
Electronically 
Optically 
Photomap 
Printer 
Printing Time (4.5" X4.5") 
Contour Line Widths 
Tic Mark Widths 
Tic Mark and Symbol Location 
Output Scale to Photo Scale Change 
5 minutes 
5-15 mils 
(2.5 mil spots) 
7.5 mils 
±5 mils 
±10% 
Automated WILD scan 
Computer generates data 
Computer generates data 
Computer generates data 
Computer program 
Computer 
General-Purpose Digital Computer 
32,000 words 
System 
Processing Times Contours and 
(36 bits) 
58 minutes 
Orthophoto (4.5"X9" model) 
137 minutes 
C-Factor (ASP) 
250 
180 
Horizontal Error 
0.02" 
IBM 7094 
DAMC System (Predictive) 
DAMC System (Sequential) 
DAMC System (Predictive) 
DAMC System (Sequential) 
DAMC Systems 
Anthony, M. E. Boyd, T. L. Gardner, R. B. 
Jacobson, P. D. Holly, N. R. Mauro, S. J. 
Ostrowsky, and C. G. Roth for their substan 
tial contributions which have recently brought 
the system to its present state of operating 
performance. 
References 
“Research on the Rectification of Satellite Photog 
raphy by Digital Techniques,” prepared for 
Geophysics Research Directorate, Air Force 
Cambridge Laboratories, USAF, Bedford, Mass., 
Contract AF 19(604)8432. 
Mach, R. E. and T. L. Gardner; “Rectification of 
Satellite Photography by Digital Techniques,” 
IBM Journal of Research and Development, July 
1962. 
“Investigation of Photographic Mapping Detail 
and Data Encoding,” First Interim Technical 
Report, prepared for U.S. Army Engineer Re 
search and Development Laboratories, Fort 
Belvoir, Va., Contract DA-44-009-ENG-4777, 
1 April 1961 to 31 July 1962. 
“Studies of a Digital Method for an Automatic 
Map Compilation System,” Final Technical 
Report, prepared for U.S. Army Engineer Re 
search and Development Laboratories, Fort 
Belvoir, Va., DA-44-009-ENG-4205, Jan 1 to 
July 31, 1960. 
Newton, J. D. and H. F. Dodge. “Digital Fictitious 
Data for Automatic Mapping Research,” To be 
published in Photogrammetric Engineering. 
Presented at the March 1964 meeting of the 
American Society of Photogrammetry. 
“Optimized Digital Automatic Map Compilation 
System,” Fourth Interim and Final Technical 
Reports, contract DA-44-009-AMC-lll(X), 
March 10, 1964 and July 10, 1964. 
A coordinate reader which gives not only X-Y coordinates hut instan 
taneous vector distances from any point to any other point is a nice de 
vice to own! ! It’s included in the OMI-N1STRI ANALYTICAL STER 
EOPLOTTER SYSTEM, Model AP/C! ! 
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