Research On The Key Technologies Of The Area’s Surface And Its Up-and-down Entities’3D Modeling And Integration

The research of3D modeling methods and the application integration technology is oneof the significant scientific problems faced in domestic and foreign fields, and is also theimportant component of the geological information. Focusing on3D modeling and theapplication integration hot topic, this paper will developing the application of exploration andresearch Exporting to solve the3D geological research and application of some key technicalproblems, and realize the surface and its fluctuation are building geo entity three dimensionalmodel of the integration, display, and other operations, for geological disaster prevention andmitigation work provide support and information security model.With the application of the theories and methods relate to3D modeling, taking the partsareas of Xian as an example, This paper does the research for the core problems and the keytechniques that involved in3D modeling and integration process, the paper made the researchresults:Firstly, build the surface model in the researched area. Based on the Delaunay triangularnetwork algorithm with constrained edges, get the surface integrate regular and part surface’sirregular Delaunay triangular networks.Secondly, build the area’s surface and its up-and-down spatial entity models. ApplyingCAD3D modeling methods, then using3DMAX software to build the ground structures’CSG models, underground subway stations and subway tunnels’ models.Thirdly, build the3D models of the strata and ground fissures. One is using Kriginginterpolation method, TIN surface modeling technology and MultiPatch to realize the large setof the strata’3D modeling core areas of Xian; the other one is using TIN technology to fitcracks’ spatial surface, and programming to produce the crack surfaces that own spatialcontinuous distribution charactistics.Fourthly, complete different3D models’ integrated display. Using the TIN+CSG+MultiPatch integrated methods, according to the certain algorithm, complete the area’s surfaceand its up-and-down Entity models’ integration. Fifthly, On the basis of3D integrated scene.Using C#development language and TerraDeveloper+ArcGIS Engine components library to do development system, realize the3Dintegrated scene’s basic operations, information searching and spatial analysis etc.