spatial index造句
例句与造句
- an improved method of building up grid spatial index construction
一种改进的网格索引生成方法 - access control model of 2-d spatial region based on spatial index
基于空间索引的二维空间区域访问控制模型 - spatial index is a indispensable part of spatial database, and can dramatically improve efficiency when doing a spatial query
空间索引作为空间数据库中的重要组成部分，可以加快对空间对象的检索。 - aim at the characters of spatial data access control, the concept of spatial region access control based on spatial index was proposed
摘要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。 - presents a spatial index method based on rude grid and object bound and proves its validity and practicability on constructing spatial index . 3
创造性地提出了基于粗分格网的对象范围索引方法，并论证了该方法在建立空间索引方面的有效性和实用性。 - It's difficult to find spatial index in a sentence. 用spatial index造句挺难的
- presents a spatial index method based on rude grid and object bound and proves its validity and practicability on constructing spatial index . 3
创造性地提出了基于粗分格网的对象范围索引方法，并论证了该方法在建立空间索引方面的有效性和实用性。 - we summarize that spatial index system should provides three kinds of spatial query, they are, spatial range query, nearest neighbor query, spatial join query
本文总结出空间索引系统应提供的三类空间查询：空间范围查询、最近邻居查询、空间连接查询。 - each dimention of spatial data is not in precedence to other, so special index is needed to support spatial data, which leads to the introduction of spatial index
空间数据的多维特性在任何方向上并不存在优先级问题，因此需要研究特殊的另类“索引”以适应多维特性的空间数据。 - spatial index utilizes some kind of spatial relationship to organize data entries, with each key value seen as a point or region in a multi-dimensional space
空间索引由此应运而生，空间索引主要依靠空间对象之间的邻接性对数据进行组织，它的索引项通常是多维空间下的点或区域。 - on the aspect of data index, the essential of spatial index was advanced based on database, and a spatial index method called the spatial grid index method was put forward based on two phases database query
在数据索引方面，提出了基于数据库的空间索引的实质，对基于数据库的空间索引作了一定的研究，提出了基于数据库的sql两阶段查询的空间网格索引机制。 - on the aspect of data index, the essential of spatial index was advanced based on database, and a spatial index method called the spatial grid index method was put forward based on two phases database query
在数据索引方面，提出了基于数据库的空间索引的实质，对基于数据库的空间索引作了一定的研究，提出了基于数据库的sql两阶段查询的空间网格索引机制。 - as the display of electronic multi-media military geographic documentations is based on multiple topographic maps, increasing the display of electronic maps with macro vector data is the chief problem to solve . the paper introduces the spatial index technique at detail for it
多媒体电子兵要地志以多幅地图为显示平台，海量数据电子地图的快速显示是面临的首要问题，作者在文中详细介绍了空间索引技术。 - this thesis discusses spatial data index first, shows the history of spatial index structure, introduces the current domestic and foreign main index structure in gis's spatial joining, and then makes use of character to express spatial object
本论文首先对空间数据库的索引进行探讨，并给出了空间索引结构的发展演化图，然后介绍了目前国内外gis的空间连接过程中的主流索引结构，最后引入了字符来表达空间对象。 - then according to the current technology of gis and the latest development trend of the computer software technology, it proposed a primitive components gis spatial data organization model making use of the object-oriented technology . it also brings forward a method of how to take advantage of the object-oriented idea to store the spatial data and the property data consistently into the relational database and set up a spatial index
然后，遵照当今gis技术和计算机软件技术的最新发展趋势，提出了一种利用面向对象技术，从底层开发符合特定应用的组件式gis控件的思想，并给出了在这种思想下，组织、存放空间数据和属性数据以及建空间索引的方法。 - demands for spatial index directly come from spatial methods . in spatial database, spatial methods are implemented in two steps : first is filter step, in which spatial object's number is reduced through spatial index . second is refinement step, in which spatial objects resulted from filter step are subjected to exacted computation
空间索引的直接需求来自于大量空间对象上的空间运算，本文认为在空间数据库中空间运算应该分两步进行：第一步是筛选步骤，通过空间索引缩小进行比较的空间对象的个数；第二步为细化步骤，对从第一步中筛选出的空间对象进行精确的空间运算操作。
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