Trimetrogon Explained

Trimetrogon is an aerial photographic survey method that involves the use of three cameras in one assembly. One camera is pointed directly downwards, and the other two are pointed to either side of the flight path at a 30° depression angle (60° from vertical). The images overlap, allowing the use of stereographic interpretation of the topography.^{[1] [2]} The name comes from the Metrogon cameras used in the original montages.^[3]

Further reading

• Fuller . Curtis . January 1944 . Three-Eyed Mapping . Flying . 34 . 1 . 63–65, 148 . 16 February 2024.
• Book: Imhof . R.K. . Doolittle . R.C. . Thompson . M.M. . Mapping from oblique photographs . 1966 . American Society of Photogrammetry . Falls Church, Virginia . 875–917 . 3rd.

Notes and References

1. Web site: Antarctic Air Photography . Polar Geospatial Center . University of Minnesota . 13 August 2015.
2. Web site: Lefsky . Michael . Trimetrogon Photography . CEARS – Historic Aerial Photo Blog . Wordpress.com . 21 May 2014 . 13 August 2015.
3. Encyclopedia: trimetrogon . American Heritage Dictionary of the English Language. 2015 . Houghton Mifflin Harcourt . 13 August 2015.