Spatial overlay is an important model of spatial analysis in GIS.
空间叠加模型是地理信息系统（GIS）中重要的空间分析模型。
Methods employed include spatial analysis in GIS, hierarchy analysis, correlation analysis.
研究方法：GIS空间分析法、层次分析法、相关性分析法。
Overlap analysis is a widely used spatial operation for the needs of spatial analysis in GIS.
叠置分析是GIS进行空间分析时常用的一种空间操作。
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