Arcgis---画圆

        public void DrawCircle_Graphics(IPoint pPoint, double radius, IRgbColor pColor)        {            #region 定义填充颜色与类型            ILineSymbol pLineSymbol = new SimpleLineSymbolClass();//产生一个线符号对象            pLineSymbol.Width = 2;            pLineSymbol.Color = pColor;            IFillSymbol pFillSymbol = new SimpleFillSymbolClass();//设置填充符号的属性            pColor.Transparency = 0;            pFillSymbol.Color = pColor;            pFillSymbol.Outline = pLineSymbol;            #endregion            IConstructCircularArc pConstructCircularArc = new CircularArcClass();            pConstructCircularArc.ConstructCircle(pPoint, radius, false);            ICircularArc pArc = pConstructCircularArc as ICircularArc;            ISegment pSegment1 = pArc as ISegment; //通过ISegmentCollection构建Ring对象            ISegmentCollection pSegCollection = new RingClass();            object o = Type.Missing; //添加Segement对象即圆            pSegCollection.AddSegment(pSegment1, ref o, ref o); //QI到IRing接口封闭Ring对象，使其有效            IRing pRing = pSegCollection as IRing;            pRing.Close(); //通过Ring对象使用IGeometryCollection构建Polygon对象            IGeometryCollection pGeometryColl = new PolygonClass();            pGeometryColl.AddGeometry(pRing, ref o, ref o); //构建一个CircleElement对象            IElement pElement = new CircleElementClass();            pElement.Geometry = pGeometryColl as IGeometry;            //填充圆的颜色            IFillShapeElement pFillShapeElement = pElement as IFillShapeElement;            pFillShapeElement.Symbol = pFillSymbol;            IGraphicsLayer pLayer = (GISMapApplication.Instance.Scene as IBasicMap).BasicGraphicsLayer;            IGraphicsContainer3D pGC = pLayer as IGraphicsContainer3D;            pGC.AddElement(pElement);        }

调用

                IPoint p = GeometryUtilities.ConstructPoint3D(longtitude[k - 1], latitude[k - 1], 0);                PointConvert.Instance.GetProjectPoint(p);                IGraphicsLayer pLayer = (GISMapApplication.Instance.Scene as IBasicMap).BasicGraphicsLayer;                DrawUtilities.DrawPoint(pLayer as IGraphicsContainer3D, p);                IRgbColor pColor = new RgbColorClass();    //颜色                pColor.RGB = System.Drawing.Color.FromArgb(255, 0, 0).ToArgb();//(B,G,R)                DrawCircle_Graphics(p, dis, pColor);