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AE栅格分类渲染问题解决

2024-11-21 12:02:02   203人阅读

当按照下面方式写代码时，真正的分类break并没有设置成功。注意黑体部分；

　

        public static void ClassifyRenderRaster(IRasterLayer pRasterLayer, int ClassifyNum)        {            IRasterClassifyColorRampRenderer pRClassRend = new RasterClassifyColorRampRenderer() as IRasterClassifyColorRampRenderer;            IRasterRenderer pRRend = pRClassRend as IRasterRenderer;            IRaster pRaster = pRasterLayer.Raster;            IRasterBandCollection pRBandCol = pRaster as IRasterBandCollection;            IRasterBand pRBand = pRBandCol.Item(0);            if (pRBand.Histogram == null)            {                pRBand.ComputeStatsAndHist();            }            pRRend.Raster = pRaster;//this            pRClassRend.ClassCount = ClassifyNum;            pRRend.Update();//this            //省略colorRamp的生成代码            int[] breaks = { 0, 25, 50, 75, 100, 200 };            IFillSymbol fillSymbol = new SimpleFillSymbol() as IFillSymbol;            for (int i = 0; i < pRClassRend.ClassCount; i++)            {                //fillSymbol.Color = colorRamp.get_Color(i);                fillSymbol.Color = GetColor(i);                pRClassRend.set_Symbol(i, fillSymbol as ISymbol);                pRClassRend.set_Break(i, breaks[i]);//this               //pRClassRend.set_Label(i, pRClassRend.get_Break(i).ToString("0.00"));             }                pRasterLayer.Renderer = pRRend //this             }

 

改动后成功。IRasterRenderer.Update须在设置break之后，并且IRasterLayer须赋值为IRasterClassifyColorRampRenderer。

　

        public static void ClassifyRenderRaster(IRasterLayer pRasterLayer, int ClassifyNum)        {            IRasterClassifyColorRampRenderer pRClassRend = new RasterClassifyColorRampRenderer() as IRasterClassifyColorRampRenderer;            IRaster pRaster = pRasterLayer.Raster;            IRasterBandCollection pRBandCol = pRaster as IRasterBandCollection;            IRasterBand pRBand = pRBandCol.Item(0);            if (pRBand.Histogram == null)            {                pRBand.ComputeStatsAndHist();            }            pRClassRend.ClassCount = ClassifyNum;            int[] breaks = { 0, 25, 50, 75, 100, 200 };            IFillSymbol fillSymbol = new SimpleFillSymbol() as IFillSymbol;            for (int i = 0; i < pRClassRend.ClassCount; i++)            {                fillSymbol.Color = colorRamp.get_Color(i);                fillSymbol.Color = GetColor(i);                pRClassRend.set_Symbol(i, fillSymbol as ISymbol);                pRClassRend.set_Break(i, breaks[i]);                //pRClassRend.set_Label(i, pRClassRend.get_Break(i).ToString("0.00"));            }            //IRasterRenderer pRRend = pRClassRend as IRasterRenderer;            //pRRend.Update(); 这两句可以省略            pRasterLayer.Renderer = pRClassRend as IRasterRenderer; //this        }

 

　　

开始主要参照这几个，没有解决

AE 栅格图分级渲染 ： 参照这里不重新设置break的话（就是不是自定义分类），只设置每个分级的颜色之类的，是可以的，

arcengine栅格渲染（栅格重分类） IRasterClassifyColorRampRenderer ：未测试

IRasterClassifyColorRampRenderer 使用时的一些奇怪的地方： 这个顺序不行吧？

AE栅格分类渲染问题解决


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