TECHNICAL PAPERS
Aug 1, 1984

Accuracy and Reliability in Geodetic Networks—Program System Optun

Publication: Journal of Surveying Engineering
Volume 110, Issue 2

Abstract

A program system is developed allowing the adjustment of one, two and three dimensional geodetic networks while taking into account accuracy and reliability aspects. The aims of the system are to enable the operator to improve and to optimize given measurement concepts and to provide a powerful tool for adjustment and blunder detection. This paper describes the basic theory, stressing especially external reliability, free adjustment of a net and the combination of pre‐analysis and adjustment. The examples and numerous adjustments of nets confirm that the system is capable of fulfilling the imposed requirements. It is flexible enough to be extended to cater for any further type of observations or additional unknowns. The flexibility was achieved by a high modularization of the program using a data management scheme which is valid for a whole set of different application programs.

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References

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Baarda, W., “A Testing Procedure for Use in Geodetic Networks,” Netherlands Geod. Commission, Vol. 2, No. 5, Delft, Netherlands, 1968.
2.
Bahndorf, J., and Gründig, L., “Dreidimensionale Ausgleichung und Deformationsanalyse zur Bauwerkskontrolle,” III. Int. Symposium über Deformationsmessungen mit geod. Methoden, Budapest, Hungary, 1982.
3.
Förstner, W., “Die Suche nach groben Fehlern in photogrammetrischen Lageblöcken,” DGK, Reihe C, Heft 175, Munich, W. Germany.
4.
Förstner, W., “Das Programm TRINA zur Ausgleichung und Gütebeurteilung geodätischer Lagenetze,” ZfV, Heft 2, 1979.
5.
Gründig, L., Bahndorf, J., Neureither, M., “LOCAL‐A‐FORTRAN Package for Localization of Movements in One‐, Two‐ and Three‐Dimensional Networks,” IAGB, University of Stuttgart, W. Germany.
6.
Gründig, L., Bahndorf, J., Neureither, M., “Zur Auswirkung von Beobachtungsfehlern auf Deformationen oder Deformationen als Beobachtungsfehler gedeutet,” in Deformationsanalysen 1983, HSBW, Munich, W. Germany.
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Levenberg, K., “A Method for the Solution of Certain Nonlinear Problems in Least Squares,” Quart. Appl. Math., 2, 1944, pp. 164–168.
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Meissl, Pl., “A Priori Prediction of Roundoff Error Accumulation in the Solution of a Super‐Large Geodetic Normal Equation System,” NOAA, Professional Paper 12, U.S. Department of Commerce, 1980.
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Persson, C.‐G., “On the Estimation of Variance Components in Linear Models and Related Problems,” Stockholm, Sweden, 1981.
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Pope, A., “The Use of the ‘Solution Space’ in the Analysis of Geodetic Network Adjustments,” IAG Symposium on Computational Methods in Geometric Geodesy, Oxford, England, 1973.
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Go to Journal of Surveying Engineering
Journal of Surveying Engineering
Volume 110Issue 2August 1984
Pages: 133 - 145

History

Published online: Aug 1, 1984
Published in print: Aug 1984

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Authors

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Lothar Gründig
Dr.‐Ing., Institut für Anwendungen der Geodäsie im Bauwesen, Universität Stuttgart, Keplerstrasse 10, D‐7000 Stuttgart 1
Joachim Bahndorf
Dipl.‐Ing., Institut für Anwendungen der Geodäsie im Bauwesen, Universität Stuttgart, Keplerstrasse 10, D‐7000 Stuttgart 1

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