buffer zone analysis 缓冲区分析
The creation of a buffer zone is not in itself an analysis, but the new polygons that are created can be used in analysis.
产生的缓冲区域并不是以缓冲区域本身来分析，而是被建立的新多边形被用来作为分析之用。
In normal application of a GIS buffer zone analysis, we always need to pick an object in that specific spatial area.
在一般GIS环域分析的应用中，成果在于如何利用环域成果进行空间上的选取操作。
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