Research And Application Of Visualization Of Terrain Model And Culture Model Integration In 3D Virtual Navigation

In recent years,the visualization of 3 dimension space datas which stems from the combination computer graphics with geographical information system is a new hot research topic.It is use of the geology data that the geography information system collects,by the modelling of 3D space datas,the texture reflecting,setting up of the light shining model,choice of projection pattern and navigation in 3D scene,being able to carry out the dynamic manifestation of terrain with high 3D. Now,it is widely used in battlefield environment simulation, entertainment and 3D games,navigation in 3D scene,road choosing,soil plan and so on.Based on consulting relevant documents,this article research the visualization of 3D virtual scene and finish some work such as the creation of the square grid of terrain surface using DEM(Digital Elevation Model), the creation of the culture using the data of the culture model,and the integration of the DEM and the culture,to establish the real navigation system in 3D scene.In the article the research of the integration of the DEM and the culture model is key.According to the theoretic research achievements of this article and the related program,the author has developed a 3D navigation system using OpenGL technology in Visual C++ development environment.This system has many functions such as the import of the data,display and reconstruction of 3D model,the texture picture reflectint to terrain and culture,the setting of the navigation route.Finally,the user can use this system to observe 3D scene from every aspect and navigate in 3D virtual scene.