Photogrammetric triangulation with separately orientated stereo models

Abstract

Since 1946 the author has been studying the problem of space triangulation at the Division of Photogrammetry at the Royal Institut of Technology, Stockholm. The investigations were among other things concenrated on the systematic errors and the possibility of eliminating them in plotting instruments. Bertil Hallert, professor of photogrammetry at the Royal Institute of Technology, has given me the most valuable support in this work. As a result of the investigations a method was developed, which has found considerable employment during the last two years at the Photogrammetric Order Division of the Geographical Survey Office of Sweden when producing an accurate control survey for special maps, scale 1 : 2.000–1:10.000. In this paper a short description of the principle of the method is given and an example of the application of the method is reported. A report on the method was delivered to the Royal Institute of Technology in May 1949 and was published in “Fotogrammetriska Meddelanden” from the division of photogrammetry in March 1950.