Adjustment of observation accuracy harmonisation parameters in optimising the network’s reliability

Edward Nowak, Waldemar Odziemczyk


Appropriate precision and low cost are the basic conditions that have to be fulfilled by a project of a geodetic network. Reliability, translating into the ability to detect gross errors in the observations and higher certainty of the obtained point position, is an important network characteristic. The principal way to provide appropriate network reliability is to acquire a suitably large number of redundant observations. Optimisation of the observation accuracy harmonisation procedure allowing for the acquisition of an appropriate level of reliability through modification of the observation a priori standard deviations is the focus of this study. Parameterisation of the accuracy harmonisation is proposed. Furthermore, the influence of the individual parameter operation on the effectiveness of the harmonisation procedure is tested. Based on the results of the tests an optimal set of harmonisation parameters which guarantees the maximal efficiency of the harmonisation algorithm is proposed.


network reliability; accuracy harmonisation

Full Text:



Baarda, W. (1967). Statistical concepts in geodesy, volume 2 of Publication on Geodesy, New Series. Netherlands Geodetic Commision.

Baarda, W. (1968). A testing procedure for use in geodetic networks, volume 2 of Publication on Geodesy, New Series. Netherlands Geodetic Commision.

Grafarend, E. W. (1974). Optimization of geodetic networks. Bolletino di Geodesia a Science Affini, 33(4):351–406.

Nowak, E. (2011). Reliability design of geodetic networks by quality harmonization of observations. Reports on Geodesy, 90(1):341–347.

Prószyński, W. (1997). Measuring the robustness potential of the least-squares estimation: geodetic illustration. Journal of Geodesy, 71(10):652–659, doi:10.1007/s001900050132.

Prószyński, W. (1994). Criteria for internal reliability of linear least squares models. Bulletin Géodésique, 68(3):162–167.

Prószyński, W. (2014). Seeking realistic upper-bounds for internal reliability of systems with uncorrelated observations. Geodesy and Cartography, 63(1):111–121, doi:10.2478/geocart-2014-0009.

Prószyński, W. and Kwaśniak, M. (2002). Niezawodność sieci geodezyjnych. Oficyna Wydawnicza Politechniki Warszawskiej.

Vaniček, P., Krakiwsky, E. J., Craymer, M. R., Gao, Y., and Ong, P. S. (1990). Robustness analysis. Technical Report 156, Univ. of New Brunswick, Fredericton, Canada.



  • There are currently no refbacks.

Copyright © Reports on Geodesy and Geoinformatics 2014-2018, e-mail:
eISSN: 2391-8152