Handling Boundary Uncertainty in Cadastre
Özet
Since humanity transitioned to a settled lifestyle, real property boundaries have been documented for various purposes, primarily to secure tenure rights. Cadastral workflows have also evolved in time to serve diverse goals including boundary documentation as one of the main objectives. With limited availability of real property and global challenges like rapid urbanization and population growth, it is essential for property boundary records to be accurately and consistently understood by all stakeholders. Technological advances have made surveying tools widely accessible, fostering the perception that their results are seamlessly accurate. However, every cadastral measurement, calculation, and estimation inherently involves some level of uncertainty. This uncertainty affects boundaries and derived data (e.g., surface area, coordinates) and stems mainly from limited understanding of cadastral processes. Addressing this requires raising user awareness of these processes. Thus, the main aim of the thesis was to enhance the understanding of boundary and associated uncertainty, and to develop a comprehensive approach for addressing it. Since a boundary is a complex phenomenon, the documentation efforts are complex and quite not straightforward. Although this complexity may not be immediately apparent during initial registration, uncertainty-related problems often arise when cadastral data is reused across different fields. In this context, this thesis first provides a thorough explanation of the concepts of cadastral boundary and uncertainty, and then integrates these areas to develop a conceptual model. The developed conceptual model, called Uncertainty in Cadastral Triangular Model (U-CTM), was further illustrated through real-world examples and evaluated in the contexts of dispute resolution, specifically focusing on parcel boundary re-establishment works, parcel area information, and the impact of geo-hazards. A methodological approach was also proposed for handling parcel area-related problems based on an international standard, Land Administration Domain Model (LADM). Extensions to this model were also presented. The study concluded that boundary uncertainty in cadastre should be approached holistically. The developed conceptual model to address this issue can be applied across different legal systems.
