In order to reduce ulteriorly retrieving range for spatial information query and to raise query speed, the retrieving technology oriented class objects in two lev…
为了便于缩小空间范围，快速地进行空间查询检索，引入了面向类对象的分级查询技术，有效地提高了空间查询的速度。
In order to reduce ulteriorly retrieving range for spatial information query and to raise query speed, the retrieving technology oriented class objects in two lev…
为了便于缩小空间范围，快速地进行空间查询检索，引入了面向类对象的分级查询技术，有效地提高了空间查询的速度。
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