Proposal for the development of a 3D hybrid model for the Hellenic cadastre
Potsiou, Chryssy et al.
Cadastral registration based on a two-dimensional parcel representation of space (2D cadastral unit) was adequate for several decades. However there has been an active and increasing use of space above and below the land surface with a fragmented legal status (various properties, property rights, right-holders). Thus, encouraged by the recent technological developments the use of three-dimensional approaches in cadastral systems (3D-cadastral unit) is investigated. The spatial databases, 3D GIS and CAD applications can be effectively used for 3D modeling, spatial analysis and visualization of cadastral objects. Greece has rural areas of intense relief with various autonomous properties at various levels (parcels, single family houses, mines etc), with overlapping property projections in a 2D-unit system. In the highly urbanized areas, too, there are autonomous properties like condominiums, metro, motorways, utility networks, etc, which have overlapping projections in a 2D-unit system. The technical specifications of the Hellenic cadastre (HC) require the creation of a 2D-unit cadastral GIS; there are no provisions for a 3D-cadastral unit reference for the legal rights and the other cadastral information. This paper proposes a smooth transition from the existing HC 2D-GIS to a 3D hybrid model, so as to preserve the existing 2D-unit system but also integrate 3D representations of the physical objects.
Event: 2nd International Workshop on 3D Cadastres
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