激光线扫方式扫描获取的点云数据量大，不利于存储、处理和分析，为此提出了一种基于向量夹角计算的点云数据精简表达方式及相应STL 文件生成方法，可有效精简大量的点云数据，且能够通过保留数据对象的关键拐点而维持原有数据对象信息的完整性。基于邻近点分析生成STL 文件的方法形成的三角面片之间无常规STL 文件生成方法所具有的缝隙及畸变现象，因此，具有较大的适用性和实际参考价值。

As the data volume of point clouds obtained by means of the laser line scanning mode is very large, and not convenient for storage, processing and analysis. A simplified expression of point cloud data based on vector angle computing as well as the corresponding STL file generation method is introduced. The proposed method can not only reduce point cloud data efficiently, but also reserve the integrity of the original data object information by retaining key inflection point data of the related object. Different from common generating method of the STL file, the gap and distortion between triangles are avoided by the STL file generation method based on adjacent points analysis and is of great applicability and practical reference value.