栅格数据相减之后结果图漆黑一片

zhaoyizou

请问下arcgis engine 使用IMathOp.Minus运算后的结果怎么保存啊.我用IsaveAs保存后是黑色的一片,但是我添加到axMapControl1中却是有图像显示的..具体代码如下

1. ESRI.ArcGIS.SpatialAnalyst.IMathOp mo = new ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass();
   
2.             IRaster result2 = mo.Minus(layer2 as IGeoDataset, layer as IGeoDataset) as IRaster;
   
3. ISaveAs save = result2 as ISaveAs;
   
4.             save.SaveAs(System.Environment.CurrentDirectory + "\\img\\difflayer01.img", null, "IMAGINE Image");
   
5. //添加到axMapControl1中显示,此结果是正确的.
   
6. IRasterLayer diffLayer = new RasterLayerClass();
   
7. diffLayer.CreateFromRaster(result2);
   
8.   diffLayer.Name = "difflayer";
   
9. axMapControl1.AddLayer(diffLayer, 0);
   
10. axMapControl1.Refresh();
    

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zhaoyizou

自挽
在线等..急急急~