“Generalized building polygon partitioning for automatic generation of 3-D building models” by Sugihara
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Title:
- Generalized building polygon partitioning for automatic generation of 3-D building models
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Abstract:
Building polygons as shown in Figure 1 are buildings’ contours on the digital map stored by GIS (Geographic Information System). Based on building polygons, I am proposing a GIS and CG integrated system to generate 3-D building models automatically. A 3-D urban model such as shown in Figure 2 is the important information infrastructure that can be utilized in several fields, such as landscape evaluation, urban planning, disaster prevention simulation, etc. When a real urban world is projected into 3-D virtual space, buildings are major objects in this space. To realize a 3-D urban model, it is important to generate building models efficiently. However, in order to realize a 3-D urban model, enormous time and labor have to be consumed to acquire the spatial data and to design the models. For example, when manually modeling a house with roofs by Constructive Solid Geometry (CSG), one must follow these laborious modeling steps: 1) generation of primitives of appropriate size, such as box, prism or polyhedron that will form parts of a house 2) boolean operation among these primitives to form the shapes of a roof and a house body 3) rotation of parts of a house 4) positioning of parts of a house 5) texture mapping onto these parts
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