The testing of new optical combinations for taking photographs and plotting at the ("Institute geographique national ")

Abstract

Improvement in the quality of (air) photographic coverage is an essential factor in increasing the general output of photogrammetric work. Indeed, any gain in the definition of the image makes it possible to secure a survey of given accuracy from photographs on a smaller, scale. This result in a great saving on all the operations involved in the survey, as a result of the reduction of the number of plates covering the same area.