Initial design of an LADM-based 3D Cadastre - Case study from Korea

Korea and The Netherlands have started a 3 year cooperation covering joint research, capacity building and international advisory in the domain of cadastre and land administration with a special focus on 3D developments. At the Korean side the Korea Cadastral Survey Corporation and the University of Seoul are involved, while at the Netherlands side the Kadaster, Delft University of Technology, and the University of Twente (ITC) are involved. These partners have been active during the last decade in a range of cadastre, 3D GIS, and related investigations, pilots, tests, etc. The Republic of Korea has also formulated a policy of a 3D NSDI (National Spatial Data Infrastructure), which forms the context for further cadastre developments. Similarly, in the last two to three years in the Netherlands a national 3D pilot has been conducted resulting among others in the inclusion of 3D in model of the BGT (base register for large scale topography). These are excellent environments to design 3D cadastral solutions as the 3D cadastral parcels (3D legal spaces) are often related to (planned) physical objects; such as buildings, tunnels, pipelines and other constructions. For reference (and consistency) purposes the 3D legal objects and their 3D physical counterparts should be associated. This implies at least two aspects: 1. the 3D physical object descriptions (topographic objects) should exists, which is not obvious as in most countries the large scale topographic base map is still 2D, and 2. the topographic objects should be usable and reference-able even when the data is maintained by other organizations. The Land Administration Domain Model (LADM, ISO 19152) supports SDI implementations as the information infrastructure requires in the model (and the system that maintains data within the model): unique id’s for all objects, full database history (versioning), and blueprints of external classes. This besides the fact the standard provides the semantics of land administration data to other users within the SDI. After completing the first step the Korean 3D Cadastre Pilot Project, with focus on describing use cases and collecting 3D data for selected cases to populate the prototype systems to gain experience and support, the second step must now further provide a 3D cadastre application model (together with a legal and systemic alignment strategy). In the context of the reform of the Korean cadastre we (further) investigate the potential use of the ISO LADM standard, for both 2D and 3D representation. This paper presents our plans for the design of an LADM-based 3D extension to the cadastral registration in Korea. Note that in Annex D9 of the ISO LADM, 2012, there is already a very first version of a Korean country profile.OTB ResearchOTB Research Institute for the Built Environmen