AE设置投影而非重投影IGeoDatasetSchemaEdit

AE设置投影而非重投影

读取一个jpg格式的影像，包含jgw文件，这时设置投影。赋值操作。

 IRasterDataset raster = rasterWsp.OpenRasterDataset(FileName);
 //AE设置投影为WebMercator投影
 IGeoDatasetSchemaEdit schemeEdit = raster as IGeoDatasetSchemaEdit;
  if (schemeEdit.CanAlterSpatialReference)
 {
           schemeEdit.AlterSpatialReference(webMercator);
 }

构建webMercator投影：

  //创建WGS84辅助球Web墨卡托投影
         public ISpatialReference CreateWebMector()
         {
             // 实例化SpatialReferenceEnvironment.SpatialReferenceEnvironment
             Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
             System.Object obj = Activator.CreateInstance(factoryType);
             ISpatialReferenceFactory3 mSpatialReferenceFactory3 = obj as ISpatialReferenceFactory3;
             ISpatialReference projSpatialReference = mSpatialReferenceFactory3.CreateProjectedCoordinateSystem((int)esriSRProjCS3Type.esriSRProjCS_WGS1984WebMercatorMajorAuxSphere);//基于WGS84的WebMercator
             //esriSRProjCS2Type.esriSRProjCS_WGS1984WorldMercator);
             //esriSRProjCS3Type.esriSRProjCS_WGS1984WebMercatorMajorAuxSphere);
             //esriSRProjCS2Type.esriSRProjCS_WGS1984SphereWebMercator
             return projSpatialReference;
         }

CreateWebMector