When surveying the closed traverse, sometimes there appears a kind of untrue closing phenomenon.
闭合导线测量时，有时会出现一种假闭合现象。
Automatic searching polygon is one of essential algorithm in GIS spatial analysis and important used in cadastral treatment and closing error of traverse network calculation.
多边形的自动搜索是GIS空间分析的基本算法之一，同时也在地籍拆宗、导线网闭合环的闭合差计算等领域有着重要的作用。
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