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On the basis of analyzing present 3D GIS modeling methods, a new 3D modeling method is put forward in corresponding to features of 3D data in geology, mine and so on. On basis of initial data, Lagrange interpolation algorithm is adopted to increase control points and generate the initial layered data. With the dynamic discrete network model, a layered index mechanism for 3D model data structure is...
In order to organize and manage 3D GIS spatial data effectively, and represent 3D spatial entity integrally, a new simulation modeling algorithm is put forward, which combines data structures of constrained TIN and CSG. In this algorithm, TIN model is used to represent terrain and CSG model is used to represent buildings. The two simulation models are integrated by extracting ground contour lines...
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