It is always the key technology of spatial DBMS to find a efficient index structure.
找到一个高效的索引结构一直是空间数据库研究的重点。
The structure index can be used to describe the spatial distribution of human activity.
景观结构指标可以用来描述人类活动强度的空间分布。
The structure index can be used to describe the spatial distribution of human activity.
景观结构指标可以用来描述人类活动强度的空间分布。
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