Advances In Techniques To Formulate The Watertight Concept For Cadastre

The world's rising urban density expansion has resulted in a proliferation of attempts to efficiently use space and a higher level of spatial complexity in metropolitan areas. 3D geospatial data models are increasingly being embraced to facilitate communicating the spatial dimensions of complex built environments in different applications. For example, the use of 3D models in land administration systems has been recognized as a good approach for communicating the spatial complexity of legal spaces within multi-storey buildings. The spatial extent of legal space-to which rights, restrictions and responsibilities relate in a 3D digital cadastre-needs to be accurately defined and geometrically closed; watertight. Therefore, this study aims to address the challenges regarding checking the closure of diverse 3D legal spaces and engage several techniques to formulate the watertight concept for cadastre. The research's methodology is built on a 3D polyhedral surface using a half-edge data structure. A primitive check is employed to assess the spatial consistency of lower-dimensional primitives of 3D objects. Subsequently, advanced closure checks ensure the closure of volumetric legal spaces represented by 2-manifold and non-2-manifold data models. The article concludes that, by adopting the proposed approaches, the internal spatial consistency of legal spaces in urban land administration will be certified.