Web based Archeology and Urban Planning Support System by AutomaticGeneration of 3D Ancient Buildings

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3-D ancient city models including temples, pagodas and ancient gate are important in archaeological research and urban planning. To facilitate “Public Involvement”, 3-D models visualizing a real city or an ancient city by a 3-D CG can be of great use. However, creating 3D city models is labor intensive, using a 3D modeling software such as 3ds Max or SketchUp. In order to automate laborious steps, we are proposing a GIS and CG integrated system for automatically generating 3D building models, based on building polygons (building footprints) on digital maps. Digital maps shows most building polygons' edges meet at right angles (orthogonal polygon). In the digital map, however, not all building polygons are orthogonal. In either orthogonal or non-orthogonal polygons, we propose the new system for automatically generating 3D building models with general shaped roofs such as hexagonal temple building by straight skeleton computation.