spatial join造句
例句与造句
- The classical r - tree as index is adopted in spatial joining . r - tree is performed by bulk loading
在空间连接处理的算法上采用了经典的r树作为索引，采用批生成算法生成r树。 - 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。 - 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。 - Third , the dissertation specifies the spatial join query processing based on service oriented architecture . two strategies are proposed . the first one , called the ssji strategy , can efficiently reduce the overall costs by precomputing and materializing the spatial semi join results
最后,论文研究了空间数据服务发现问题,基于信息检索理论,提出了基于集合模型和向量模型的服务发现方法,提高了服务发现的查全率和查准率。 - In addition , we summarize some spatial join algorithms based on r - tree index and their cost estimation models . we also give out a query optimization algorithm framework based on dynamic programming algorithm , and integrated basic r - tree index method and query optimization mechanism into sadbs ii
另外，本文还总结了几种基于r树索引的空间连接算法及其代价评估模型，利用动态编程算法给出了查询优化的算法框架，并在sadbs中集成了基本的r树索引方法和查询优化机制。 - It's difficult to find spatial join in a sentence. 用spatial join造句挺难的
- Given a query window , spatial range query finds all spatial objects that might conform to certain spatial relationship with the query window . nearest neighbor query finds spatial object nearest to given point . spatial join query always involves two or more than two map layers
空间范围查询在某图层内找出与给定查询窗口满足一定空间关系的所有空间对象；最近邻居查询在某图层内找出距离某点最近的空间对象；空间连接查询往往涉及对两个或两个以上图层中空间对象之间的操作。