The thesis deals with the properties of strains and rotations in geodetic network. In each point kinematic quantities are considered: normal strain, shear strain and rotation. Appropriate statistical treatment of kinematic quantities requires known statistical properties of each quantity in each point of geodetic network. Empirical results show that statistical properties of the strains in each point are strongly related to the considered direction in point and local geometry of the geodetic network. In this way the confidence areas for each quantity in each point can be determined. Based on this, we can carry out appropriate statistical testing and decide whether the deformation of the network in point is statistically significant or not. With known size and shape of confidence areas it is also possible to ascertain the quality of the geometry of the geodetic network. Besides this, the main purpose of the thesis was to show that the strain parameters and rotations are dependent on the change of geodetic datum between two survey epochs. In the case of two different coordinate systems in each survey epoch we cannot compute the true values of point displacements, strains and rotations. Despite all empirical studies already carried out in the field of datum invariance of strains and rotations, we analytically derived the mathematical relationship of strains and rotations with respect to the relative changes in geodetic datum parameters between two survey epochs. The practical example of functional dependency was carried out in the case of selected planar geodetic network.