Modern geodetic terrestrial technology involves automatized observations based on an application of robotic total stations. The benefit of such an advanced geodetic instrument is in its high precision sustainability, manipulation simplicity, maximum flexibility, one-person operability and personal error reduction. The paper is devoted to the analysis of results achieved by using such a modern geodetic instrument in the process of diagnostics of the geometrical position of piers structures built at Klaipeda Seaport. The analysis was carried out to find out the influence of the air, water temperature and wind direction, and speed on the measurement results that should be used in the global seaport monitoring system. Based on the results obtained from this research work a method of displacements was proposed in relation with water temperatures up to wind speed 10 m/s and with the application of the normal distributed displacement measured values of points in order to evaluate the measurement error regarding the temperatures.
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