Trimetrogon

Trimetrogon is an aerial photographic ( photogrammetric ) surveying method from the time shortly after the Second World War with a system of three ( tri ) cameras . The first camera points directly to the earth's surface, the other two point to the sides of the flight path with an angle of inclination of 30 ° or more to the horizontal. The superimposition of the images obtained allows a stereographic analysis of the topography of the overflown area.

The name comes from the lenses provided with the name Metrogon by the manufacturer Bausch & Lomb of the cameras of the first of these systems.

The method was u. a. mapped larger parts of Antarctica .

literature

• RK Imhof, RC Doolittle: Mapping from oblique photographs . Ed .: MM Thompson. 3. Edition. American Society of Photogrammetry, Falls Church, Virginia 1966, p. 875-917 .

Individual evidence

1. ^ Antarctic Air Photography . University of Minnesota. Retrieved September 1, 2016.
2. ^ Trimetrogon Photography . Wordpress.com. May 21, 2014. Retrieved September 1, 2016.
3. ^ Entry in American Heritage Dictionary of the English Language . Houghton Mifflin Harcourt. 2015. Retrieved August 13, 2015.
4. ^ Antarctic Air Photography . University of Minnesota. Retrieved September 1, 2016.