Accession Number : AD0282889

Title :   PROTOTYPE STEREOMAT SYSTEM

Corporate Author : ARMY ENGINEER GEODESY INTELLIGENCE AND MAPPING RESEARCH AND DEVELOPMENT AGENCY FORT BELVOIR VA

Personal Author(s) : YORITOMO,KENT T.

Report Date : 08 MAR 1962

Pagination or Media Count : 1

Abstract : This analysis covers the engineering test and evaluation of the prototype Stereomat, an instrument for the automatic orienting, contouring, and profiling of a stereophotogrammetric model. The Stereomat consists of electronic scanning, correlating, and switching units added to a double-projection stereoplotter for the point-by-point automatic determination of pattern match in a projected stereomodel. TheANALYSIS CONCLUDES THAT: (a) The Stereomat is a significant achievement in the automation of the stereoplotting process which has firmly established the feasibility of automatic mapping, (b) The speed and accuracy of relative orientation are comparable to the speed and accuracy of manual operation, (c) Contouring with the Stereomat is almost as accurate as contouring manually and is twice as fast, (d) The accuracy of profiles is slightly less than that of contours, (e) A maximum slope limitation of 26 deg exists for both profiling and contouring, (f) A minimum slope limitation of 3 deg exists for contouring, (g) Dense woodland constitutes problems in contouring, (h) The Stereomat is an easy instrument to operate for individuals experienced with conventional stereocompilation, (i) Operational maintenance of the equipment is relatively easy and is required infrequently, and (j) Orthophotographic output is not feasible with this design because of the low signal-to-noise ratio in the video. (Author)

Descriptors :   *AERIAL PHOTOGRAPHY, *MAPPING, *STEREOSCOPIC MAP PLOTTERS, AUTOMATIC, PHOTOGRAPHIC EQUIPMENT, TESTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE