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。
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。
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。
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。
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。
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