空间数据近邻查询作为空间数据库在现实生活中的具体应用，受到人们越来越多的关注。
As a concrete application of spatial database, nearest neighbor query of spatial data has attracted more and more attention in reality.
空间自相关是地理信息科学目前研究的热点问题，作为空间数据挖掘的一种手段，它着重分析了空间实体的聚集程度，阐释了事物之间普遍联系的准则。
As a hot topic in present GIS research, and as one of the ways of spatial data mining, the spatial autocorrelation focuses on spatial data convergence and shows that everything is related with others.
GIS在通信领域中的应用包括两个方面：一是GIS和通信技术集成作为提供空间数据服务的技术在通信领域的应用；
The application of GIS (geographic information system) in telecommunication includes two aspects. One application is that GIS provides spatial data service in telecommunication field.
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