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3D building model is the important foundation of constructing virtual landscape of 3D city. This paper will focus on building models and construct buildings in small scene with existing survey data based on the secondary development of Google SketchUp. The concept of scenelite will be illustrated. The research shows that the method can effectively reduce the redundancy of repeated work in modeling...
Topological relations are research focus in 3D GIS. Constructing nodes and arcs from curves, building the topological relations of these primitives with their parent geometry and other geometries, and forming the topological graph, are the basis of the calculation of topological relationship. The formal description and smallest set of topological relationships of 3D curves are given. The line segments...
A hybrid 3D spatial data structure for the integration of aboveground, ground and underground objects based on spatial cognition theory is proposed, which considers the space subdivision and topology completeness. Object-oriented method is used to abstract objects in real world which is defined into three levels. Geometry primitives and topology primitives are defined in this data structure. Topology...
The formal representation of topological relations plays a very important role in process of spatial query, spatial analysis and spatial reasoning. Most current models support a single representation of geometry and topology at a fixed resolution. While it often happens that different applications take into consideration spatial data/topological relationship, with the same 3D scene date, under different...
The concept and classification of the Grid-enabled Spatial Information Workflow are proposed in this paper. The workflow modeling method based on the directed graph and spatial information workflow description method on the BPEL (Business Process Execution Language) specification are proposed. The spatial information workflow running process is discussed in detail. The prototype system is developed...
This paper first discusses the relationship between scale and spatial cognition, and then presents a new a hybrid data structure for integrated modeling of geographic 3D data, combining man-made and natural features above, in and below the earth surface. In this data structure, TIN/TEN approach is used to represent field objects and Boundary Representation approach is used to represent feature object...
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