针对FNR+-Tree模型2D R-Tree叶子节点项过多、存在大量插入操作等缺点,提出改进模型FNR*-Tree.根据移动对象的多少将区域划分为城市和郊区,在此基础上分别给出索引城市和郊区中移动对象过去、现在和未来位置的模型.分析结果表明,该模型具有较高的查询效率和杏询精度.%Aiming at many disadvantages of the FNR+-Tree model including excessive leaf node entries and a large number of insert operations,this paper proposes an improved model named FNR+-Tree. According to the number of moving objects, the district can be divided into urban and suburban areas, and on this basis, this paper proposes a method separately, which can index the object moving in urban and suburban areas and a new approach in. Analysis results show that the model has good query efficiency and query accuracy.
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