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A PROCEDURE FOR ON-LINE CORRECTION OF SYSTEMATIC ERRORS 
Rudiger Kotowski; Bernhard Weber 
Institut für Photogrammetrie der Universitat Bonn 
Bundesrepublik Deutschland 
Kommission III 
Abstract 
Using the latest development in analytical and numerical photogrammetry a 
procedure for on-line correction of systematic and local-systematic errors in 
Analytical Plotters has been elaborated. Inspired by the finite element method 
for height interpolation, the proven strategy - to correct within local grid 
squares - has led to a modified and more flexible form. Using this method 
local-systematic errors of the photogrammetric system cannot only be dis- 
covered, but also corrected on-line after model formation. 
An example for extended calibration of the analytical plotter Planicomp C100 
demonstrates the efficiency of the chosen method.