Photographs of Our M. T. C. System 
Noting each photograph in turn on the following pages: 
1. 
shows the Zeiss planimat with the Instronics digitizers, also 
note the X, Y and Z mechanical interfacing for the planimat. 
shows the hardware configuration for the Instronics digitizer. 
The digitizers record data directly onto the magnetic tape re- 
corders (Digi-Data). These digitizers can be used in the point 
mode or in the time mode for recording. (The point mode being 
used generally for the man-made topographical features, e.g. 
buildings, railroads, etc. . The time mode being used for nature- 
made detail, e.g. rivers, contours, vegetation, outlines, etc.) 
shows the Zeiss Planimat with the Wang 2300 digitizer 
Wang 2300 digitizer 
the alpha-numeric keyboard on the Wang 2300 series. The key- 
boards are used to enter nomenclature, building and street names, 
etc., onto the magnetic tapes. 
the X, Y and Z mechanical interfacing, also the Z counter 
shows the stereo operator in the plotting mode 
shows the internal plotting table of the Zeiss planimat. As the 
Stereo operator traverses the model information via the foot pedal 
the operation does two things: 
(a) it drops codes, subcodes, X, Y and Z information 
onto the magnetic tape, and,