Shoreline as the Boundary of a Property in the Cadastre

A specific type of property boundary is the boundary of land adjacent to flowing waters, known as the shoreline. This type of boundary is characterized by temporal and spatial variability as a result of natural forces. As a result, there is a need for periodic updates of the cadastre, both in terms of spatial data and subject data. This is due to the fact that lands covered by inland surface waters are often owned by the State Treasury. Such a situation occurs, among other places, in Poland. In the case of a change in the position of the shoreline due to river erosion, there are also changes in the structure of land ownership rights. This article presents the most important legal aspects of determining the shoreline in Poland and compares them with regulations in selected European countries. The main problems related to the implementation of the process of delineating lands under water are discussed. Universal solutions are proposed that can contribute to improving the quality of data on boundaries of plots located in the immediate vicinity of flowing waters.