It used a fast-created quad-tree to execute region query, which not only improved the query efficiency, but also shortened the time of constructing a spatial index.
使用快速生成的四叉树进行区域查询，在提高查询效率的同时，有效缩短构造空间索引的时间。
It used a fast-created quad-tree to execute region query, which not only improved the query efficiency, but also shortened the time of constructing a spatial index.
使用快速生成的四叉树进行区域查询，在提高查询效率的同时，有效缩短构造空间索引的时间。
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