Research On The 3D Terrain Model For Construction And Visual Simulation

The mesh is born is the key approach in the visual technique problem, espcially to the complicated area data field , such as according to an analytical engineering analysis calculation, three dimensions of the geology body visualization, the fluid mechanics particularly.Because Delaunay triangle net is a basic space excellent structure, maneuverability good, so acquired the extensive application,.It is also an essential in geography study.This text is at study the triangle create in geography application.This text introduces the basic concept of the mold first in the geography , the method and three dimension model's technical and domestic and international research present condition.Second the born way of TIN model-Delaunay trianglen net creation, carry on the detailed introduction and analysis, and discuss the born calculate way of the triangle net of the restrict Delaunay , giving to the creation restrict Delaunay key step within triangle net creation.In three model visiualization research, data to obtain and descript for the object on the surface is the hot issue in the geography.In this text research introdeuce adoption of data and creation of model.The method in the paper adopt creating two demension model and adding the correspond altitude value . Give at the same time road, river, house, the marsh land creates method and the result diagrams in a specific way.Three dimension model realization and visiualization is a first step of three geographies dimension , mainly is to adopt the triangle net of the restrict Delaunay .How carry out three many resolutions descriptions of the three dimension model and creation three dimension model is worthy of further research of direction.