ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
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Enterprises of the GMGK have recently been equipped with stereophotogrammetric devices and the techniques of photogrammetric bunching have been improved. This permitted a considerable reduction in the geodetic network of field points for preparation of aerophotos in topographic mapping on scales of 125,000 and 110,000. New photoreducers have been developed the single-projector PRS and the four-projector model which permit direct optical reduction of grids of 80-90 cm to a base scale with an error of no more than 0.2-0.3 mm averaging 0.10-0.15 mm. In the extensive development of the analytic method of three-dimensional phototriangulation, the use of the new photoreducers has great promise since they are needed for all work where photogrammetric bunching is done on a general-purpose instrument. The four-projector device detects and avoids patterned distortions.
- Cartography and Aerial Photography