74 THE NAVY OCEANOGRAPHIC OPERATIONS PROGRAM 



cannot be matched by manual construction methods. 



In the four years that the automatic digital coordinatograph 

 system has been in operation, a large library of computer pro- 

 grams for different types of cartographic functions has been 

 developed. 



Computer programs are in use for the following: 



Construction of all types of electronic navigational position 

 lattice systems, both hyperbolic (LORAN, etc.) and circular 

 (Shoran, etc.) plotting sheets. 



Construction of over 30 different map projections. 



Annotation and plotting of soundings resulting from hydro- 

 graphic surveys based on ship-furnished information and 

 electronic lattice system control data. These data are 

 processed through special control survey and edit programs, 

 which automatically plot the soundings in their proper lati- 

 tude and longitude position and annotate the correct depth 

 in fathoms and feet. 



Plotting and scribing of geographic shoreline and other 

 map features and using the photo-projector head for anno- 

 tating position of cities. 



Delineating the major great circle sailing routes and 



underwater cable routes of the world; the production 



of magnetic variation and declination charts of the world. 



Scribing of various metric plotting grids and military 



reference grids for overprinting on nautical charts. 



Computer programming techniques can produce as many as 



twelve chart originals in eight hours, completely plotted, scribed, 



and ready for photo-lithographic production. Stops are required 



only for changes in scribing materials and magnetic tapes. In the 



4 years the plotter has been in operation, over 7000 individual 



original drawings and color separation originals have been produced. 



The automatic cartographic capabilities of the Naval Oceano- 



graphic Office have been recognized throughout the world. 



Numerous requests for automatic services have been filled from 



other domestic government agencies, private institutions, and 



foreign governments. Broad guidance, production assistance, 



technical information, and computer program documentations have 



