擦除后圖層保存在新圖層中

使用GP工具。

修改原有圖層數(shù)據(jù)實現(xiàn)擦除

參考：

點擊打開鏈接

代碼為：

public void EraSEOper(IFeatureClass ExSourceFC,IFeatureClass ExEraseFC)        {            IFeatureClass mFeatureClass = null;            IFeatureClass mSourceFeatureClass = null;            IFeatureCursor mFeatureCursor = mFeatureClass.Search(null, false);            IFeature mFeature = mFeatureCursor.NextFeature();            while (mFeature != null)            {                ISpatialFilter tSF = new SpatialFilterClass();                tSF.Geometry = mFeature.Shape;                tSF.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;                //求出與裁切框相交要素                IFeatureCursor tFeatureCursor = mSourceFeatureClass.Search(tSF, false);                IFeature tFeature = tFeatureCursor.NextFeature();                while (tFeature != null)                {                    IGeometry tGeo2 = tFeature.ShapeCopy;                    ITopologicalOperator tTope2 = tGeo2 as ITopologicalOperator;                    tTope2.Simplify();                    IGeometry tGeo = tFeature.ShapeCopy;                    ITopologicalOperator tTope = tGeo as ITopologicalOperator;                    tTope.Simplify();                    //用Envelope對要素進行裁切                    tTope.Intersect(mFeature.Shape, esriGeometryDimension.esriGeometry2Dimension);                    //tTope.Clip(this._Envelope);                    IGeometry tGeoClip = (IGeometry)tTope;                    //用裁切出來的要素,再與其源要素進行求差處理,即得到外圍要素                    IGeometry tGeoDe = tTope2.Difference(tGeoClip);                    //把外圍要素賦予源要素                    tFeature.Shape = tGeoDe;                    tFeature.Store();                    tFeature = tFeatureCursor.NextFeature();                    mFeature = mFeatureCursor.NextFeature();                }            }        }
需要完善的內(nèi)容
1.沒有判斷IFeatureClass對象是否為面對象，如果不為面對象則無法實現(xiàn)擦除。2.沒有考慮投影問題。3.還有待發(fā)現(xiàn)其他可能產(chǎn)生的問題。