摘要： 缓冲区分析是二维GIS空间分析的基本功能，但目前对三维GIS中的缓冲体分析研究较少。该文对三维缓冲体分析的意义进行了分析，并针对地质应用，根据生长元是否向周围均匀扩散及扩散周围是否存在障碍物，对三维缓冲体的种类进行了划分。提出了有约束缓冲体的生成算法，讨论了非均质的缓冲体的生成算法。

关键词: 3D 地理信息系统, 缓冲区分析, 距离变换

Abstract: The buffer analysis is the basic function in 2D GIS, but the research on the buffer analysis in 3D GIS is little. This paper analyzes the importance of 3D buffer analysis. It classifies the 3D buffer according to the geological application, whether the surrounding is uniform or not, and whether the barrier exists around or not. This paper proposes an algorithm for the 3D buffer-generation with the restriction, and discusses the algorithm for the 3D heterogeneous buffer-generation.

Key words: 3D GIS, buffer analysis, distance transform

中图分类号: 

• TP391