We will now discuss the most obvious one, the exploitation of spatial indexes.
现在我们将讨论最显著的一个方面，也就是对空间索引的使用。
Selected Spatial Index list displays any spatial indexes that have been defined for the table.
“已选空间索引”列表显示为表定义的所有空间索引。
You can add or delete spatial indexes by clicking the command buttons that appear under the list.
单击显示在该列表下面的命令按钮可以添加或删除空间索引。
The structures and performances of all kinds of tree-like spatial indexes are analyzed in this paper.
树型空间索引可以高效地组织并检索高维数据，因此使用树型空间索引是改善聚类性能的有力途径。
However, it is not so easy for spatial data given that the DB2 REORG TABLE command does not understand spatial indexes due to their complex nature.
然而，如果由于空间索引的复杂性质导致DB 2 REORGTABLE命令不理解空间索引，事情就不会那么容易了。
Such indexes help to improve the performance of queries on spatial data.
这类索引有助于改善针对空间数据的查询的性能。
The DB2 spatial Extender comes with an index Advisor that you can use to optimize indexes defined on columns that contain spatial data.
DB 2Spatial Extender附带了一个IndexAdvisor，可以用它来优化包含空间数据的列上定义的索引。
According to statistic stationary random process theory, a set of three - dimensional indexes and methods describing the shape of spatial curved surface of rough fracture have been presented.
根据数理统计原理，从随机平稳过程理论出发，提出了一套描述裂隙空间曲面几何形态的三维指标和方法。
Meanwhile, the drought criterions, drought indexes as well as spatial and temporal distribution characteristics within dry periods are analyzed.
文章还对江西干旱标准、干旱指数与伏、秋干旱时空分布客观特征等进行分析。
Experimental results show that the retrieval method using the feature indexes can achieve much higher precision than other color-spatial based methods.
实验结果表明，用这种特征索引来检索图像，可以得利比其它基于颜色-空间方法高得多的精确度。
We also set up the spatial database in order to make geographic information coordinate with tax indexes.
构建空间数据库、建立空间信息与税务数据相结合的税务管理空间地图。
Comparing the dynamics of the indexes of three periods, systematically analyses the dynamic of the landscape spatial structure of LiangShui Natural Reserve.
根据这些指数的变化情况，分析凉水自然保护区的景观要素结构的变化情况。
Comparing the dynamics of the indexes of three periods, systematically analyses the dynamic of the landscape spatial structure of LiangShui Natural Reserve.
根据这些指数的变化情况，分析凉水自然保护区的景观要素结构的变化情况。
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