ArcEngine二次开发之提取外包矩

1、通过ITopologicalOperator接口，此方法适用于需要获得包含几个或多个要素的最小外包矩形

public IEnvelope GetEnvelope(IGeometryCollection pGeometryCollection)

{

IPolygon pPolygon = new PolygonClass();

ITopologicalOperator pTopo;

pTopo = pPolygon as ITopologicalOperator;

pTopo.ConstructUnion(pGeometryCollection as IEnumGeometry);

IEnvelope pEnvelope = pPolygon.Envelope;

return pEnvelope;

}

2、通过IGeoDataset 接口，此方法适用于获得一个要素图层的外包矩形（即包含所有要素的最小外包矩形）

public IEnvelope GetEnvelope(IFeatureClass pFeatureClass)

{

IGeoDataset pGeoDataset;

pGeoDataset = pFeatureClass as IGeoDataset;

IEnvelope pEnvelope = pGeoDataset.Extent;

return pEnvelope;

}

3、要素的属性 pFeature.Extent，获得单个要素的外包矩

public IEnvelope GetEnvelope(IFeature pFeature)

{

IEnvelope pEnvelope = pFeature.Extent;

return pEnvelope;

}
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原文链接：https://blog.csdn.net/RicardoMTan/article/details/84565591