ArcEngine 岛状多边形内部环的获取

ArcEngine岛状多边形获取其内部环

查阅了帮助文档相关接口,内部环的获方法get_InteriorRingBag()

需要外部环作为参数.而外部环可以直接通过ExteriorRingBag属性获取.

具体参考下述代码(代码参考官方帮助文档):

IPolygon4 pMergerPolygon=pFeature.Shape as IPolygon4;
IGeometryBag pOutGeometryBag = pMergerPolygon.ExteriorRingBag;  //获取外部环
IGeometryCollection pOutGmtyCollection = pOutGeometryBag as IGeometryCollection;


for (int i = 0; i < pOutGmtyCollection.GeometryCount; i++)  //对外部环遍历
{
    IGeometry pOutRing = pOutGmtyCollection.get_Geometry(i); //外部环
                       
    IGeometryBag pInteriotGeometryBag = pMergerPolygon.get_InteriorRingBag(pOutRing as IRing);  //获取内部环
    IGeometryCollection pInteriorGeometryCollection = pInteriotGeometryBag as IGeometryCollection;
    for (int j = 0; j < pInteriorGeometryCollection.GeometryCount; j++)
    {
         IGeometry pInteriorGeometry = pInteriorGeometryCollection.get_Geometry(j);
         //pInteriorGeometry即为多边形的内部环
    }
}