Stereoautograph
![Stereoautograph Wild A5](https://upload.wikimedia.org/wikipedia/commons/f/f6/Royal_Air_Force-_Central_Interpretation_Unit_-_Allied_Central_Interpretation_Unit%2C_1941-1945._CH16105.jpg)
It was invented by Eduard von Orel in 1907.
The photograms or photographic plates are oriented by measured passpoints in the field or on the building. This procedure can be carried out digitally (by methods of triangulation and projective geometry or iteratively (repeated angle corrections by congruent rays). The accuracy of modern autographs is about 0.001 mm.
Well known are the instruments of the companies Wild Heerbrugg (Leica), e.g. analog A7, B8 of the 1980s and the digital autographs beginning in the 1990s, or special instruments of Zeiss and Contraves. Provided by Wikipedia
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Published: 1977
Superior document: Mitteilungen der geodätischen Institute der Technischen Universität Graz 30