这类索引有助于改善针对空间数据的查询的性能。
Such indexes help to improve the performance of queries on spatial data.
如果您熟悉空间数据和网格索引，那么结果就无需解释了。
If you are familiar with spatial data and the grid index, the results are pretty much self-explanatory.
由于涉及到空间数据，您需要为这个索引指定r - Tree访问方法。
Since the data is spatial, you need to specify the R-Tree access method for this index.
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。
The DB2 spatial Extender comes with an index Advisor that you can use to optimize indexes defined on columns that contain spatial data.
在Lucene中为空间数据建立索引。
空间数据库的索引是提高空间数据库存储效率和空间检索性能的关键技术。
Spatial index is the vital technique for improving storage efficiency of spatial databases and the spatial retrieve performance.
空间数据库的索引是提高空间数据库存储效率、空间检索性能的关键技术。
The spatial index is the key technique for improving the storage efficiency of spatial databases and the spatial retrieve performance.
空间数据库的索引是提高空间数据库存储效率、空间检索性能的关键技术。
Spatial database index is the vital technique for improving the storage efficiency of spatial databases and the spatial retrieval performance.
因此必须借助高效的索引技术来提高空间数据的处理效率。
Therefore, the efficient index technology should be used to raise the efficiency of spatial data processing.
局部线性嵌入方法是一种应用广泛的流形学习方法，本文提出算法的一种改进，并将其应用于空间数据索引。
Locally linear embedding (LLE) is a widely-used manifold learning algorithm, in this paper we improve on the algorithm and put it to use in spatial data index.
空间数据是GIS系统的主要数据组成部分，建立合理高效的空间数据索引对于GIS系统的性能有着极其显著的影响。
Spatial data is the main part of the GIS data system, constructing reasonable and efficient spatial indexing has an significant effect on the GIS system performance.
树是常用的空间数据索引结构。
The R-tree is a commonly used index structure of spatial data.
树是空间搜索的动态索引树，它的结构是利用多个维中的区间来表示空间数据对象，它是矩形访问的一种有效方法。
R-tree is a dynamic index tree of space search. Its structure use multi-dimensional region to express spatial data object. R-tree is a valid way to visit rectangle.
空间数据的无序性，使得应用在其上的利用连接索引的算法需要进一步的改进，为此分析了其中关键的最佳页访问次序问题。
For the reason of the no order of space data, the algorithm based on join index have to improve for it. The key problem of optimal page-access sequence with a fixed Buffer has been analyzed.
最后指出在空间数据库中的高维索引的研究是目前前沿研究的热点。
Finally, it is pointed out that the high dimensional index is a hot research field in spatial databases.
然而，由于空间数据的特殊性使得传统索引方法不能很好地适应空间数据的存取。
However, traditional index methods are not well suited to access spatial data objects because of the special properties of spatial data.
在综述现有空间数据库索引技术的基础上，提出了一种面向大型空间数据库的QR-树索引方法。
This paper classify a series of methods on spatial database index, and introduce the QR-tree index structure with very large spatial database.
针对空间数据的访问控制的特点，提出了基于空间索引的区域访问控制概念。
Aim at the characters of spatial data access control, the concept of spatial region access control based on spatial index was proposed.
目前空间数据相似性查询有着广泛的应用需求，解决相似性查询问题的一项关键技术就是高维空间数据索引。
Nowadays the applications of spatial data similarity search are widely needed, and high dimensional spatial data index becomes a key technology of similarity search.
本文结合XML数据库技术和传统的空间数据库技术，对GML空间数据的查询、索引进行了深入的研究。
Combining XML database technology and traditional spatial database technology, this paper conducts a deep research on querying and indexing GML data.
引入SDE空间数据索引技术，通过改善空间索引的性能来优化空间数据库。
Optimize the spatial database by improving space data index performance based on SDE.
空间数据库系统通过引入空间索引机制来提高空间数据操作的效率。
Efficient processing of operations in spatial database systems relies upon auxiliary spatial indexing mechanism.
主存空间数据库需要相适应的空间索引。
近年来，针对空间数据库索引的研究引起了人们越来越多的兴趣和关注。
In recent years, the research on spatial indexing is arousing more and more interests and attentions.
电力GIS系统需要对各种空间数据进行有效处理，这就要求有一个高性能的空间索引结构。
Power GIS needs to deal with a variety of spatial data effectively, so it requires a high-performance spatial index structure.
因为我使用空间信息，我想尝试一些更适合空间数据索引结构。
Because I use spatial information, I would like to try some index structures which are more suitable for spatial data.
在空间数据库中，对采用r树类型索引存储的数据集给出了三个查询处理算法。
For data sets indexed by R-trees in spatial databases, three algorithms are presented for answering this kind of query.
可实现GIS中空间数据索引、检索功能，保证了空间数据查询的快速性和准确性。
This paper implements spatial data index and search of GIS, which can ensure the quickness and exactness of the query and search results.
也就是说，对于大型空间数据库索引来说，QR -树与R -树相比整体性能上具有较明显的优势。
That is to say, for very large spatial databases, QR-tree processes more superiority than R-tree.
也就是说，对于大型空间数据库索引来说，QR -树与R -树相比整体性能上具有较明显的优势。
That is to say, for very large spatial databases, QR-tree processes more superiority than R-tree.
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