Virtual GIS applied to urban facility management

Urban facility management is one of the applications to which the virtual GIS is well applied. For virtual GIS to be utilized to manage urban facilities, some functionalities should be provided. One of them is how to manage the huge size of 3D geographic data as compact as possible at the same time providing realistic modeling and visualization. The other one is spatial analysis on urban facilities especially on multistorey buildings. In this paper, the synthetic modeling approach is proposed to model urban facilities realistically from the compact size of GIS data. Geographic features positioned in each storey of a building are also modeled and managed hence they are identified and queried for spatial analysis.