Abstract: The paper firstly analyzes the disadvantages of South CASS Software in underwater data processing. Then taking Microstation software platform for example, discusses the working ideas on the latter processing of underwater topographic survey data, namely uses Descartes software to process point cloud data, build STM and generate contour and adopts Geopak software to calculate storage capacity. Finally, compared to traditional method in data processing, the paper analyzes the advantages of this method as well as aspects need to be improved.

Key words: Microstation, Descartes, point cloud, STM, digital elevation model, storage capacity

摘要： 首先分析了南方CASS软件在水下地形测量数据处理中的弱势，接着以Microstation软件平台为例，论述了该软件在水下地形测量后期数据处理的作业思路，即以Descartes软件进行点云数据处理、STM构建和等高线生成、利用Geopak进行库容计算。最后分析了该方法与传统数据处理流程的优势以及后期需要改进的方面。

关键词: Microstation, Descartes, 点云, STM, 数字高程模型, 库容