Accession Number : AD0871865

Title :   AS-11B Program Modifications.

Descriptive Note : Final technical rept. Jul 68-Nov 69,

Corporate Author : BENDIX RESEARCH LABS SOUTHFIELD MI

Personal Author(s) : Bedross, George M. ; Abshier, James O. ; Derouchie, William F.

Report Date : MAY 1970

Pagination or Media Count : 155

Abstract : An investigation was made of modified computer programs for the AS-11B automated analytical stereoplotter. The objective was to improve overall system speed and accuracy, particularly in contouring. Plotting control program modifications were made to: (1) reduce the amount of manual assistance required and the amount of non-plotting time by improving the contouring search and the system mode control routines, (2) produce a more complete automatic compilation by immediately filling in significant gaps in the plotted line, (3) produce more uniform plotting by compensating the scan size and the X parallax gain for variations due to photo-geometry and terrain slope, and (4) improve plotting by providing a faster steering control. The plotting strategy selection procedure was simplified by providing a set of combined strategy tapes. Each combined strategy contains a compatible combination of individual strategies. In addition to the programming effort, an investigation was made of minor hardware changes that would either standarize or imporve system performance. One of these changes is required for use of the modified programs. The program modifications that improve system performance were implemented in a new set of AS-11B plotting programs. Recommendations were made for improvements in the maintenance and diagnostic procedures. It is recommended that the improvements achieved with the AS-11B system be adapted to the AS-11B-1 system, and that future improvement programs be concentrated on the AS-11B-1 system. (Author)

Descriptors :   *STEREOSCOPIC MAP PLOTTERS), (*COMPUTER PROGRAMS, (*INPUT OUTPUT DEVICES, STEREOSCOPIC MAP PLOTTERS), SUBROUTINES, AUTOMATION, COMPUTER LOGIC, CORRELATION TECHNIQUES, ERRORS, PHOTOGRAPHIC RECONNAISSANCE, PARALLAX COMPUTERS, DIFFERENTIAL EQUATIONS, FLOW CHARTING, CIRCUITS, CONTROL SYSTEMS.

Subject Categories : Cartography and Aerial Photography
      Computer Programming and Software
      Computer Hardware
      Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE