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中文摘要：
为了满足大区域地形环境的实时高速绘制要求，对多分辨率不规则三角网（Triangulated Irregular Networks．TIN）进行了研究。首先利用Voronoi图和Delaunay三角网构建了能充分反映地形地貌特征的多分辨率TIN，然后将多分辨率TIN进行了合并，统一管理，动态调用。试验结果表明，该方法构建的多分辨率TIN实时绘制地形场景时的质量和速度都很好，可以较好地应用于大规模地形场景漫游中。
英文摘要：
To study the LOD techniques for large scale terrain visualization, this paper focused on the design of muhiresolution TIN. First, a new approach of constructing multiresolution TIN that represents terrain well was given based on Voronoi diagrams and Delaunay triangulation networks. Second, multiresolution TIN was incorporated, thus making the management and load of it even more easily. The results show that the response speed and display effect are very satisfying. It can make real time and seamless walkthrough in large scale 3D visualization.
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