Cluster analysis is an important technique for data mining and knowledge discovery in spatial databases. Its main advantage is the ability to find interesting structures or clusters directly form the spatial data without using any background knowledge.

• 聚类算法能从空间数据库中直接发现一些有意义的聚类结构而不需要背景知识，是空间数据发掘和知识发现的重要手段。