3D registrations in the Hellenic cadastre
Dimopoulou, Efi ... [et al.]
In Greece, a cadastral project is in progress. Within this project, cadastral registration is based on the 2D parcel and therefore is unsuitable for representing some cases of multiple use of space or of separate ownership rights above or under the reference cadastral surface. This reflects to inadequately registering the multilayer reality of property rights. Moreover, the emergence of new technologies in 3D modelling, analysis and visualization seems rather challenging, to extend current cadastral registrations, in order to improve understanding of complex property situations. This paper presents a methodology so that registrations in the ongoing Hellenic Cadastral (HC) project better reflect property rights and restrictions. The present study starts with the description of the existing institutional and legislative framework for cadastral registrations within the HC project and the associating problems. The study refers on complex cases where the third dimension is required, to improve insight into these 3D situations. The international experience and practice so far, are also considered, along with the HC's database logical and physical data model, regarding the manner in which it could be extended to 3D objects, when required. This may necessitate some transformations and adjustments to support new data types and lengths for 3D registrations. In addition, the registration of 3D cases also requires some modifications to the way the relevant cadastral information is collected, by adding e.g. the vertical dimension and details needed for 3D visualization.
Event: XXIII International FIG Congress : Shaping the change
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