Algorithm of terrain visualization by using scanning terrain map as texture ; 2 . the simplified algorithm of view - point related multi - resolution terrain and the extended algorithm while its data are distributed like a band ; 3 . the visual application of spatial query technique in the field of vector elements overlapping and the simulative evolution of flood 在诸多技术中，结合防汛决策支持系统对可视化的具体要求，本文重点论述了：以扫描地形图为纹理的地形可视化算法；基于几何模型的视点相关多分辨率地形简化算法及其在数据呈带状分布情况下的扩展算法；空间查询技术在矢量要素叠加和洪水模拟演进方面的可视化应用。
