arcgis 根据区域刷新显示地图

最新推荐文章于 2019-08-12 11:01:27 发布

jojojojo2002

最新推荐文章于 2019-08-12 11:01:27 发布

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分类专栏： ArcGIS 文章标签： object null

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本文介绍如何使用特定的符号和颜色在地图中绘制形状，包括设置坐标、确定范围、选择颜色、创建不同类型的符号（如简单线、填充、标记）以及应用到地图上。通过调整ROP2参数、宽度、透明度等属性，实现个性化地图展示。

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            IEnvelope pEnv = new EnvelopeClass() as IEnvelope;
            pEnv.PutCoords(x1, y1, x2, y2);
            m_ipGeo = (IGeometry)pEnv; ;//确定范围
           m_iApp.MapControl.FullExtent = pEnv; //必须加上否则地图不能正常显示

            if (null == m_ipGeo) return;
            IRgbColor pColor = new RgbColorClass();
            //pColor.RGB = m_corlorSelection.ToArgb();
            Color cr = m_iApp.SelectionCorlor;
            pColor.Blue = cr.B;
            pColor.Green = cr.G;
            pColor.Red = cr.R;
            pColor.Transparency = cr.A;
            object ob = null;
            int m_iSelectionRadPixels = m_iApp.SelectionBufferInPixels;
            ISymbol pSymbol = null;
            switch (m_ipGeo.GeometryType)
            {
                case esriGeometryType.esriGeometryPolyline:
                    ISimpleLineSymbol pSimpleLineSymbol = new SimpleLineSymbol();

pSymbol = (ISymbol)pSimpleLineSymbol;

                    pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;// = esriROPNotXOrPen;
                    pSimpleLineSymbol.Color = pColor;
                    pSimpleLineSymbol.Color.Transparency = 1;
                    pSimpleLineSymbol.Width = m_iSelectionRadPixels;
                    break;

                case esriGeometryType.esriGeometryPolygon:
                case esriGeometryType.esriGeometryEnvelope:
                    ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbol();

                    pSymbol = (ISymbol)pSimpleFillSymbol;
                    pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
                    pSimpleFillSymbol.Color = pColor;
                    pSimpleFillSymbol.Color.Transparency = 1;
                    break;
                case esriGeometryType.esriGeometryPoint:
                    ISimpleMarkerSymbol pSimpleMarkersymbol = new SimpleMarkerSymbol();
                    pSymbol = (ISymbol)pSimpleMarkersymbol;

                    pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
                    pSimpleMarkersymbol.Color = pColor;
                    pSimpleMarkersymbol.Size = m_iSelectionRadPixels + m_iSelectionRadPixels + m_iSelectionRadPixels;
                    break;
            }
            ob = (object)pSymbol;
            m_iApp.MapControl.DrawShape(m_ipGeo, ref ob);