Create a grid index on the spatial column.
在空间列上创建一个网格索引。
None of the other spatial functions can exploit a grid index.
其他任何空间函数都不能使用网格索引。
So we create a spatial grid index that will be used at query time.
所以我们创建一个空间网格索引，这个索引将在查询时用到。
The lower this value is the more likely the optimizer will choose to scan the grid index.
这个值越低，优化器就越有可能选择扫描网格索引。
Additionally, you find the name that was assigned to the grid index right below the EISCAN.
此外，您将在EISCAN下面发现网格索引的名称。
As was explained before, the DB2 optimizer is not fully aware of all the details of the spatial grid index.
前面我们解释过，DB 2优化器不完全知道空间网格索引的细节。
If you are familiar with spatial data and the grid index, the results are pretty much self-explanatory.
如果您熟悉空间数据和网格索引，那么结果就无需解释了。
To check if a spatial grid index is actually exploited during query time, you should have a look at the access plan.
为检查在查询时是否真正使用了一个空间网格索引，应该查看一下访问计划。
The grid index based on linear quadtree is used to index the point cloud data, extracting the point cloud on the block.
采用基于线性四叉树的格网索引对点云数据建立索引，对点云数据进行分块提取；
Now that the spatial table is populated, it is time to add a spatial index to support spatial queries; in DB2 that is a grid index.
既然已经填充了空间表，就应该添加空间索引来支持空间查询了；在DB 2中这是一个网格索引。
For example, you could follow the idea of the grid index and use the identifier of a single grid cell that overlaps with the geometry.
例如，可以按照网格索引的思想，使用与几何图形重叠的一个网格单元的标识符。
If all conditions are met, including the simple syntax rule, it is still not ensured that a spatial grid index is used to satisfy the query.
如果所有条件都符合，同时也符合简单的语法规则，那么还不能保证可以使用空间网格索引来满足查询。
To ensure that we got meaningful results, we also verified that the grid index is actually exploited for this query as explained in a later section.
为了确保能得到有意义的结果，我们还像后面一个小节中解释的那样，检验网格索引是否真正被用于这个查询。
Multilayer grid index can reduce the redundance and index size of traditional grid index, so that the entire grid index can be loaded to client side.
层次网格索引是在传统网格索引的基础上，进一步改进，减少了传统网格索引的冗余和索引的大小。
Through the analyses of the grid index and the spatial object index, a structure of the spatial object boundary index based on wide grids is put forward.
在充分分析格网索引和空间对象范围索引的基础上，提出一种基于粗分格网的空间对象范围索引结构。
This paper researches the construction of tin, based on adopting self-adapt clump organization to establish grid index, and proposes a quick algorithm of constructing tin.
论文对TIN的构建算法进行了研究，提出了一种基于自适应分块建立网格索引的算法。
Aiming at the shortcoming of ordinary algorithm, which would omit the grid when it creates the grid index, the paper presents a new algorithm to create the precise grid index.
针对使用传统算法创建网格索引存在遗漏网格的缺点，本文提出一种建立精确网格索引的新算法。
So you can extract the information how many index entries would be generated on which grid level if you choose certain grid sizes — without actually creating and materializing the index.
所以，可以提取关于在选择某种网格大小时在哪个网格层次上将生成多少索引项的信息，而不必真正创建和物化索引。
The tool cannot only be used to get Suggestions for the various grid sizes but also to collect statistics of an existing or planned (virtual) index.
该工具不仅可用于获得关于各种不同网格大小的建议，还可以用于收集一个已有的或计划中的(虚)索引的统计信息。
Compared with grid and R-tree, the index has slightly space costs but most higher index performance.
与网格索引和R树索引相比，该索引以略大的空间开销换取了更高的查找性能。
The power margin index for Shanghai grid voltage stability is presented, and the time domain simulation checking method for the power margin index is discussed.
摘要介绍了上海电网电压稳定功率裕度指标，探索了电压稳定裕度指标的时域仿真校核方法。
The problem due to grid size among dat a number in index table, time consuming and data validity was solved.
解决了因网格疏密程度引发的数据存储量、索引时间与网格所包含的有效信息量之间的矛盾；
Select an index to show its properties in the grid to the right.
选择一个索引以在右侧的网格中显示其属性。
At the same time, a resource index table is established at the central node to overcome the defect of centralized resource discovery over-rely on the central server of the original grid system.
同时，在中心节点建立一个资源的索引表，这样就克服了原来网格系统集中式资源发现过于依赖中心服务器的缺点。
According to the characteristics of spatial index of grids and R-tree, a hybrid structure of spatial multilevel index is presented based on grid and R-tree.
结合网格索引和R树索引的特点，提出了一种基于网格与R树的多级混合索引。
The former bases on the hillslope hydrology and puts emphasis on the effects of terrain which denoted with topographic index for each grid.
径流生成模块以山坡水文学理论为基础，重点考虑流域地形的影响，分单元引入地形指数进行产流计算。
Selected XML Index list and set properties for the index in the grid to the right.
“选定的XML索引”列表中选择新索引，然后在右侧的网格中设置该索引的属性。
Finally, users use the client programme to look for the resource from the index service machine, find out the physical characteristics of the resource, and locate the first satisfactory grid resource.
最后，用户使用客户端程序到索引服务器中查找所需资源，并进一步查询这些资源的物理特性，最终确定第一个满足条件的网格资源。
Electric power quality of wind park is a key index if wind park connects with public power grid.
风电场的电能质量是风电场并入电网运行的关键指标。
By use of sensitivity technique the authors give the definition of the index of power grid vulnerable region and propose an algorithm to calculate parameter sensitivity.
利用灵敏度技术定义了电网脆弱域指标，给出了计算参数灵敏度的算法。
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