A Digital Urban Space Model for Urban Planning and Management
In the process of infrastructure planning and construction, large scale maps such as topographic maps and land-use maps are used. These conventional maps are called 2 dimensional(2D) maps, where geographic objects are represented based on a 2D coordinate system. The conventional maps are suitable for representing terrain features and land-use in rural areas. However, they cannot be successfully applied to the representation of urban space comprising high-rise buildings and underground structures etc. This is because spatial data in the vertical dimension cannot be appropriately represented with conventional 2D expressions except the elevation of a terrain surface. To effectively support the complicated process of planning, construction and management of urban infrastructures, there is a pressing need for a fully three dimensional(3D) modelling of urban space, which allows geographical objects to be represented and located with a 3D coordinate system. Computer mapping makes possible 3D urban space modelling, which is far beyond the capability of the conventional 2D map.
KeywordsPlanar Graph Layer Graph Urban Space Topological Relationship Spatial Query
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