How to create a Colormap function dataset (ArcObjects .NET 10.6 SDK)
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How to create a Colormap function dataset


Creating a Colormap function dataset

To create a Colormap function dataset, follow these steps:
  1. Create the Function Arguments object.
  2. Specify the colormap to be used. The colormap can be loaded from a .clr or .act file.
  3. Create a Raster Function object.
  4. Create a Function Raster Dataset object.
  5. Create a name object for the function raster dataset.
  6. Specify the output file name for the new dataset.
  7. Initialize the new function raster dataset with the raster function and its arguments.
The following code example shows how to create a Colormap function raster dataset by applying the Colormap raster function to an image:
[C#]
// Create the Function Arguments object.
IColormapFunctionArguments rasterFunctionArguments=(IColormapFunctionArguments)new
    ColormapFunctionArguments();
// The input data can be of type IRasterDataset, IRasterBand, or IRaster.
rasterFunctionArguments.Raster=inputData;
// The colormap can be loaded from a .clr or .act file.
rasterFunctionArguments.LoadFrom(colormapPath);


// Create the Raster Function object.
IRasterFunction rasterFunction=new ColormapFunction();
// Create the Function Raster Dataset object.
IFunctionRasterDataset functionRasterDataset=new FunctionRasterDataset();
// Create a name object for the Function Raster Dataset.
IFunctionRasterDatasetName functionRasterDatasetName=(IFunctionRasterDatasetName)
    new FunctionRasterDatasetName();
// Specify the output file name for the new dataset (including the .afr extension at the end).
functionRasterDatasetName.FullName=@"c:\temp\Colormap.afr";
functionRasterDataset.FullName=(IName)functionRasterDatasetName;
// Initialize the new Function Raster Dataset with the Raster Function and its arguments.
functionRasterDataset.Init(rasterFunction, rasterFunctionArguments);
[VB.NET]
' Create the Function Arguments object.
Dim rasterFunctionArguments As IColormapFunctionArguments
rasterFunctionArguments=New ColormapFunctionArguments()
' The input data can be of type IRasterDataset, IRasterBand, or IRaster.
rasterFunctionArguments.Raster=inputData
' The colormap can be loaded from a .clr or .act file.
rasterFunctionArguments.LoadFrom(colormapPath)

' Create the Raster Function object.
Dim rasterFunction As IRasterFunction
rasterFunction=New ColormapFunction()
' Create the Function Raster Dataset object.
Dim functionRasterDataset As IFunctionRasterDataset
functionRasterDataset=New FunctionRasterDataset()
' Create a name object for the Function Raster Dataset.
Dim functionRasterDatasetName As IFunctionRasterDatasetName
functionRasterDatasetName=New FunctionRasterDatasetName()
' Specify the output file name for the new dataset (including the .afr extension at the end).
functionRasterDatasetName.FullName="c:\temp\Colormap.afr"
functionRasterDataset.FullName=functionRasterDatasetName
' Initialize the new Function Raster Dataset with the Raster Function and its arguments.
functionRasterDataset.Init(rasterFunction, rasterFunctionArguments)






To use the code in this topic, reference the following assemblies in your Visual Studio project. In the code files, you will need using (C#) or Imports (VB .NET) directives for the corresponding namespaces (given in parenthesis below if different from the assembly name):
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