Vector Cadastral Maps Numerical Homogeneity Analysis

Sa？etak In the cadastre of real estates in Slovakia, there is a variety of data of different origin as well as different quality. One of the main problems is the quality of cadastral maps. More than a half of these maps do not meet today’s requirements for the recording of real estates and their renewal is needed. This article deals with a homogeneity analysis, which is the first stage of the renewal of a vector cadastral map numerical. Cadastral map numerical should be the best, because it is made of coordinates, which are the result of a numerical measurement but in some of them there are various local deformations. In locations with deformations, there are objects in the POINTS layer where the coordinates of the points determined via GNSS are stored. The first stage of the renewal of these maps is an analysis of homogeneity. This stage is very important because it is necessary to understand how the local deformations behave in the whole cadastral unit and in which parts the renewal is needed. The analysis consists of considering the number of objects in the POINTS layer, selection of the locations with the local deformations, calculating the size and direction of the local deformations in chosen points and comparing the locations with each other. The homogeneity analysis leads to particular methods for the renewal of a cadastral map numerical. This solution for the next stages of the renewal is specific for each cadastral unit