This paper proposes a dynamic simplification algorithm for the terrain model based on the Triangle Subdivision Bi tree to realize continuous view dependent multi resolution rendering of terrain mesh.

为实现地形漫游，提出基于三角形二叉树的地形网格模型动态简化算法，实现了与视点相关的连续多分辨率简化及快速动态绘制。

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ROAM method adopts split and merge operations to adjust triangle meshes, can interactively perform view-dependent, locally-adaptive terrain meshing and can construct multiresolution terrain model.

ROAM算法就是通过采用分解和合并方法实时地调整三角形网格，能交互式地实现观察依赖、局部可调整的地形网格化处理，生成多分辨率的地形模型。

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To counter the splice problem of digital terrain model (DTM) the paper puts forward the algorithm of cutting out of splice line to triangle network.

该文针对数字地面模型(dtm)的拼接问题提出了基于拼接线对三角网进行裁减的算法，并对其基本原理及主要过程进行了详细介绍。

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