Polygon overlay is spatial operation in which a first thematic layer containing polygons is superimposed onto another to form a new thematic layer with new polygons.

几何图形叠盖是包含几何图形的第一主题图层被叠加形成新主题图层以新的几何图形的空间操作。

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Polygon overlay is a spatial operation in which a first thematic layer containing polygons is superimposed onto another to form a new thematic layer with new polygon.

多边形叠合是一种空间操作，在第一个包含多边形的主题层中叠上另一个由多边形组成的主题层。

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These particular computations are similar to those used in polygon overlay: intersections are computed, nodes and links are formed, topology is established, and attribute tables are updated.

这些特殊计算与那些是相似被使用在重覆叠盖的几何图形：交叉点被计算，点和连接被形成，拓扑结构建立，并且更新属性表格。

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