The technique of spatial data buffering is the efficient method which improve the efficiency of the spatial data querying.
空间数据缓存技术是提高空间数据查询效率的有效方法之一。
Spatial information analysis: to change from vector format to grid format, buffering section analysis, spatial data overlap analysis, net analysis, etc.
空间信息分析：包括矢量转栅格、缓冲区分析、空间数据的复合分析、网络分析等。
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