Developing an integrated approach to validate 3D ownership spaces in complex multistorey buildings.

3D geospatial data are being progressively adopted in urban land administration to represent 3D ownership rights in multistorey buildings. The integrity of urban land administration highly depends on the validity and quality of cadastral data. However, a large portion of research deals with the conceptual principles of internal and external spatial consistencies of 3D cadastral data. This article integrates the principles in practice and develops methods to check the validity of 3D parcels and their relationships in complex ownership settings. To evaluate the methods, this research adopts a case study using an 18-floor multistorey building with 248 lots and three types of common properties. The ownership rights of this building are delineated as polyhedral surface models, including non-2-manifold and non-simple polyhedra, and evaluated by implemented principles. The results reveal that the integrated methods can identify 3D cadastral errors, overlaps and gaps. The developed integrated approach can significantly advance urban land administration, as it facilitates complex 3D cadastral data validation. [ABSTRACT FROM AUTHOR]