Abstract
A b s t r a c t In the paper the evaluation of accuracy of the four successive campaigns of the precise levelling in P oland is presented. Estimation of accuracy was conducted by the: traditional, Lallemand and Vignal formulas. Fr om the conducted evaluations results, that the successive campaigns are characterize by the more and more small random errors. It can be interpreted that better in struments and measuring methods were used in the successive campaigns. However the systematic errors remain almost the same what can be interpreted that the influ ence of such factors like the topography, climate (refracti on) and vertical movements is always the same on th e area of Poland. Considerable divergences in the evaluation of systematic errors from Lallemand’s and Vignal’s formulas suggest that the model of systematic errors adopted by Vignal is probably not realistic and it require s further investigations.
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