In this article, the Fredericton approach to deformation analysis is presented. It is possible to use several deformation models to determine the differences between the geodetic observations or ...between the coordinates of points in geodetic network in more epochs. The most appropriate deformation model has been chosen based on statistical testing and available information about dynamics at the area of interest. First, a theoretical background of the approach is described. Then it is applied to the generated observations in two epochs. In the present example, the results of the Fredericton approach differ only slightly from the results obtained with the Delft Karlsruhe in Hannover approaches.
The Delft approach, a method for the deformation analysis, is presented in this article. Based on geodetic measurements, the statistical significance of displacements at the surface is determined ...with statistical methods. A numerical example shows the effectiveness of the presented method.
At each point of the geodetic network kinematic quantities are considered: normal strain, shear strain and rotation. This differs from the treatment of deformations on the basis of point movements as ...the traditional geodetic approach. Strain and rotation depend on the changes of geodetic datum. In the case of two different coordinate systems in each epoch, we cannot ca/cu/ate the real value of movements, strains and rotations. Despite the empirical studies of the datum invariance, we derived analytical mathematical expressions of functional dependency of strains and rotations from the relative change of datum parameters between two measurement epochs. Practical demonstration of functional dependencies has been shown in the case of the selected planar geodetic network.
U radu su opisani postupci deformacijske analize, koji na osnovi geodetskih mjerenja i uz pomoć statističkih metoda određuju prostorne pomake promatranog objekta. Za testiranje je uzeta simulirana ...geodetska mreža i na njoj su primijenjeni hannoverski, Ašaninov i Mihailovićev postupak. Prikazani su rezultati primijenjenih postupaka deformacijske analize i usporedbe uspješnosti određivanja stabilnih točaka.
