两面相交面积面积

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求polygon1,polygon2两个面相交的面积

IGeometry pGeometry1 = polygon1 as IGeometry;

IGeometry pGeometry2 = polygon2 as IGeometry;

ITopologicalOperator pTopo = pGeometry1 as ITopologicalOperator;
IGeometry pGeometry = pTopo.Intersect(pGeometry2 , esriGeometryDimension.esriGeometryNoDimension);
IPolygon pPolygon = pGeometry as IPolygon;
IArea pArea = pPolygon as IArea;

所求面积 = pArea.Area

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