The technique of modern photogrammetry is progressing in accordance with the pace of the development of Electronic Computers. Formerly, photogrammetric technique was used only as a means of making topographic maps, but now by extensive use of the computer it has changed to play an important role in deriving numerous data concerning the earth. This is because our society has advanced highly and civil engineering projects, which mainly are related to the earth, have to be managed in a series of systematic processes.
"Current Trend in the Field of Photogrammetry in Japan", Proc. SPIE 0022, Photo-Optical Instrumentation: Present & Future Developments, (1 June 1970); doi: 10.1117/12.953440; https://doi.org/10.1117/12.953440