Using high-precision total station operating in ATR mode and robust adjustment of geodetic networks for safety supervision over waterworks

High precision terrestrial geodetic measurement is one of fundamental instruments for water structures safety surveillance and supervision. This work is devoted to research the usability of high precision Leica TM30 total station, operating in ATR (automatic target recognition) mode for determining the displacements and deformations of waterworks. Data sets of geodetic measurements on dams Josefuv Dul, Rimov, Nechranice and Vrchlice was survey for observed points and reference net points on each of waterwork in one or more stages. Measured data was offset as a spatial or planar geodetic network using computer program EasyNet. This program has a sophisticated analysis of measurement data and for least squares adjustment of geodetic networks use robust methods of analysis for the exclusion of outliers and gross errors of measurement. The result is a new methodology for measuring especially horizontal displacements, which uses a new measurement technologies and computational processing. This process is more efficient and achieves more accurate and stable results than conservative displacement measurement methods, for example, the line of sight or forward intersection. A methodology for correct measurements was developed. This work is the output of CREA Hydro&Energy Ha research project undertaken thanks to PROGRAM SPOLUPRACE-Klastry.