Obituary.

Friedrich (Fritz) Ackermann, Professor Emeritus of Photogrammetry and Surveying and Former Director of the Institute for Photogrammetry at the University of Stuttgart. gl Fritz Ackermann was born on the 1st November 1929 in Moosbeuren (Ehingen) on the Danube. When Professor E. Gotthardt was appointed to the Technical University of Munich in 1965, his professorship in Stuttgart was vacant and Fritz Ackermann was able to demand the foundation of a new Institute for Photogrammetry in his appointment negotiations - he took over its direction on the 1st April 1966. The analytical block adjustment also fascinated the young researcher Fritz Ackermann, who was able to write a doctoral thesis at the ITC on "Error-Theoretical Investigations on the Accuracy of Photogrammetric Strip Triangulations" (DGK Series C, Issue No. 87) and defended it at the University of Stuttgart in 1964 - his supervisor was Professor E. Gotthardt. [Extracted from the article]