Current state of the main height basis in the context of characteristics of leveling points Ι and IΙ classes in the western regions of Ukraine

The aim is to analyze the technical characteristics of leveling points to establish their real state in the context of combining the leveling main elevation base of Ukraine with European leveling lines to identify deficiencies and to develop scientific and technical proposals to improve monitoring of leveling lines Ι and II classes on territory of Western Ukraine. Method. For the analysis of technical characteristics of leveling points, which are presented on the geoportal of DGM of Ukraine, methods of statistical analysis are used, which are based on consecutive actions to study and interpret technical characteristics of leveling points in the context of monitoring of level of SMH of Ukraine. Results. The proposed scientific and technical recommendations allow to increase the efficiency of organizational and technological processes, which are the basis for monitoring the state of geodetic points of the DGM of Ukraine, and practically prove the need for scientific and technical developments for monitoring leveling points. Scientific novelty. The performed statistical analysis of the characteristics of leveling points is the basis for the development of the author's scientific, technical and organizational recommendations for monitoring the leveling marks of the DGM of Ukraine for the relevant management structures of the State Geocadastre. It will also reveal the weaknesses of their operation, which are due to different nature of the changes that have accumulated over the long life cycle of leveling points. The set of technical characteristics of points that need refinements or changes is determined, which will increase the efficiency of inspection and updating of leveling points. The practical significance of the work is to analyze the characteristics of leveling points (name, type of center, sign, network class, method of determining coordinates, description, status, previous name, figure), which are presented on the geoportal DGM of Ukraine and located in Volyn, Zakarpattia, Ivano-Frankivsk, Lviv, Rivne, Ternopil, Chernivtsi regions in order to clarify the current state of leveling points for the development of scientific, technological, organizational recommendations for regional management structures of the State Geocadastre, as well as for specialists who perform inspections and updates of DGM. The results of the research can be used in the future to monitor the condition of the leveling points of the main altitude base of Ukraine.