Iconography Part 3

Description

This film contains footage demonstrating use of iconoscope to determine actual scale and size of objects shown in oblique photographs. Lists types of assignments iconographer is likely to receive. Shows iconoscope, tools, and other equipment. Shows two methods used to orient iconoscope to match angle and focal length of camera at time photograph was taken. Explains how to make vertical measurements, compensate for perspective in photographs, and construct target perspectives. Animated diagram explains principles behind iconoscope and vertical measurement. Shows mathematical formula for finding "dip angle," difference between "true" and "apparent" horizons. Shows maps and diagrams constructed using iconoscope and photographs. Suggests reading manual on subject published by Office of Strategic Services and gives address.

Collection

Records of the Office of Strategic Services

Series

Training Films, Instructional Films, and Film Reports Relating to World War II