The paper examines the development of geodetic calibration baselines as a key factor in enhancing the accuracy of geodetic measurements. In the context of increasing demands for precision due to urbanization, infrastructure projects, and international cooperation, the harmonization of metrological standards is gaining particular importance. Comparing key parameters of the geodetic calibration baselines in Finland, Germany, Austria, Spain, and the Czech Republic demonstrates how modern methods contribute to achieving high accuracy. An important step is the conversion of length unit to other countries, which supports the improvement of technological processes for all subsequent integration activities. Measurement results at the geodetic calibration baseline in Javoriv showed that modern instruments, such as laser trackers and electronic total stations, achieve accuracy comparable to that of more precise laser rangefinders used previously. Certain deviations caused by potential pillar shifts highlight the need for further research to optimize calibration procedures and increase measurement accuracy, which will have a significant impact on Ukraine's integration into the European metrological system.
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