Validity of Mixed 2D and 3D Cadastral Parcels in the Land Administration Domain Model

In the move towards a 3D Cadastre, many jurisdictions are considering a hybrid 2D/3D database as either a stage of development or as a target in itself (van Oosterom, Stoter, Ploeger, Thompson and Karki 2011). The Land Administration Domain Model (LADM), which is the underlying model for the ISO 19152 standard assists in this approach by defining a data structure which allows a relatively seamless mixing of 2D and 3D “spatial units” (Lemmen, Van Oosterom, Thompson, Hespanha and Uitermark 2010). This standard is in its final stages of approval (Lemmen, Uitermark and van Oosterom 2012). For the purpose of this paper, there is no important distinction to be made between “parcels” “lots” or “spatial units”, since it is only the spatial aspects (topology and geometry) that are being considered, so the term “parcel” will be used to mean the extent of land or space being considered.OTB ResearchOTB Research Institute for the Built Environmen