Multidimensional building objects in a Danish geo-information infrastructure perspective

The emerging multidimensional GI- and VR-technologies within the professional disciplines dealing with design, planning and management processes is leading to a demand for four-dimensional building objects as part of the public geo-information infrastructure. The other way around the recognition of the building as a four-dimensional geo-phenomenon will provide a reference between different data sets whether representing buildings in two, three or four dimensions. Finally a central issue is the potential in using frameworks of multidimensional representations as interfaces to the available data sets. A Danish core data set based on three-dimensional building objects as well as aspects of time is suggested as means of facilitating the co-ordination of the object definitions in the existing public and private 2D-map products, the public registers as well as the 3Dconcepts from the built and planning environments. On this basis the interaction between actual use, the structuring paradigm, the means of communication as well as the actual need for metadata and metainformation in a city-renewal environment is considered.