Geometric Model of 3D Cadastre for Strata Title using 2D and 3D Data Integration Approach

Abstract

Abstract In order to establish the Land Administration System (LAS) in Strata Title case, the concept of 3D Cadastre is used widely. The semantic and geometric of 3D spatial unit (3D rights) in the building must be conducted first, but to provide such 3D spatial data is complicated, especially related to the owner privacy. Furthermore, the higher the Level of Detail (LOD) and Level of Information (LOI) of 3D model, the more complex the data acquisition and the higher accuracy needed will be. Therefore, the concept of 3D Cadastre could be adopted where the availability of 2D data still usable, such as the data of as-built-drawing of the building. However, how to do the integration of 2D and 3D spatial data and their accuracy analysis needs to be examined first, as the purpose of this study. The case study of this research is ‘Labtek IXC’, located in Ganesha Campus of Institut Teknologi Bandung. The 3D data was conducted using High-Definition Survey in available room and the 2D data was as-built-drawing in unavailable room (available and unavailable due the ownership privacy aspect). The High-Definition Survey produced the point cloud data. The point cloud data was processed using common steps such as filtering and cloud-to-cloud registration. The data modelling method was used the parametric modelling based on the registered point cloud and as-built-drawing of the building. The result of this study is the integration of 3D model. The geometric of the 3D model was compared with the reference size of the room from the distometer measurement. The geometric accuracy of the 3D model produced satisfactory result, that is 0.019 m.