关键词: 三维地形, 可视化, 四叉树, 节点误差评价系统

Abstract: Based on the research about organizing and real-time rendering of terrain data，this paper realizes the terrain multi-resolution representation by quadtree for getting good three-dimensional visualization effect；a reasonable node evaluation system is designed，which is based on the consideration of viewpoint and terrain roughness；for eliminating the cracks between the nodes of different resolution，a method of fast adaptive triangulation mesh division is put forward.The experiment result presents，on the premise of keeping terrain photorealistic，terrain visualization get good rendering quality and displaying rate using the technology of this paper.

Key words: three-dimensional terrain, visualization, quadtree, node evaluation system