On the basis of this model, the author put forward a R tree based unified spatiotemporal index (UST TREE) and described its structure and mechanism.

• 并在此模型上提出了一个基于R树的统一时空索引 (UST TREE)机制 ；定义了节点结构 ；并分析、描述了此索引的结构及原理 .