关键词: 网格融合, 三维地物模型, 地形匹配

Abstract: Important 3D object models often used the model data which is created by CAD softwares（3D Studio MAX/AutoCAD（3D）/MultiGen） in 3D terrain visualization.These data are widely available in fine structure，material feature and inner shape.It should be matched perfectly in the process of integration between the 3D object model grid and terrain grid.In this paper，a novel method of mesh fusion between 3D object model and terrain grid is put forward.Terrain grid is generated by reading the terrain height map data.3D object model data is read into terrain grid and layed in an appropriate position.Then we could get a boundary and point aggregate by projection of 3D object，after dividing of the terrain grid of the boundary，the another boundary and another point aggregate are found.The Delauney triangle grid is generated by above two point aggregates and the Delauney condition.At last，the mesh fusion was realized.The method was demonstrated through grid fusion between terrain grid built by quadtree-lod technology and 3D object model grid.In the end of essay，the advantages and purpose of method are discussed.

Key words: mesh fusion, 3D object model, terrain matching