C#中使用IMapAlgebraOp接口进行栅格计算并将结果显示在mapcontorl中的具体流程

1. 创建IMapAlgebraOp对象

IMapAlgebraOp mapAlgebra = new RasterMapAlgebraOpClass();

2. 设置栅格表达式

string expression = "slope + aspect";
mapAlgebra.BindRaster(layer, "slope");
mapAlgebra.BindRaster(layer2, "aspect");

3. 进行栅格计算

IRasterDataset outRaster = mapAlgebra.Execute(expression);

4. 将结果显示在MapControl中

IRasterLayer rasterLayer = new RasterLayerClass();
rasterLayer.CreateFromDataset(outRaster);
axMapControl.AddLayer(rasterLayer);