Representation of 3D cadastral boundaries - From analogue to digital

This paper discusses problems and challenges concerning the process of conversion of 2D analogue cadastral boundary plans into 3D digital information and is based on experiences from a research project on visualization of 3D property boundaries in Sweden. An area next to a newly constructed sports– and event arena in Stockholm, where 3D properties are formed, is used as a case study in the project to illustrate the process and the problems related to it. Focus lies on legal issues, although other aspects are mentioned as well. The rights, restrictions and responsibilities (RRRs) are registered in the national Real Property Register, which also includes registration in the two–dimensional Digital Cadastral Index Map. A description of the process of forming 3D property is included in the paper regarding the documents and parties involved. The result of the study is that it is necessary to interpret two–dimensional cadastral data and textual descriptions in order for it to be used in a digital 3D environment, e.g. Building Information Modelling. The result shows that current legislation has to be investigated and interpreted in detail to be able to add or transform into using 3D models as part of cadastral decisions in Sweden. The current cadastral process is also analyzed and suggestions for further development are provided.