Summary:

The paper presents the problem of systematic influence of homogeneous environment on the results of precise azimuth and coordinates transferring in long geodetic networks for tunnels. A concept of exact solution of geodetic network for minimization of refraction effect as well as a calculation example is presented. The development of robotic total stations allows for effective refraction angles adjustment directly during measuring in tunnels. Innovative, group adjustment of traverse deviations in local geodetic network allows for reliable control of directional angles transferring. Results of the research and predictions of traverse displacement of coordinates in the elongated, local and unilateral tunnel networks are presented.