How to create a Spectral Conversion function dataset

Creating a Spectral Conversion function dataset

To create a Spectral Conversion function dataset, follow these steps:
  1. Create the Function Arguments object.
  2. Specify the spectral matrix as an array of doubles in row major.
  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 Spectral Conversion function raster dataset by applying the Spectral Conversion raster function to an image:
[C#] 
// Create the Function Arguments object.
ISpectralConversionFunctionArguments rasterFunctionArguments = 
    (ISpectralConversionFunctionArguments)new
    SpectralConversionFunctionArgumentsClass();
// The input data can be of type IRasterDataset, IRasterBand, or IRaster.
rasterFunctionArguments.Raster = inputData;
// Specify the spectral matrix as an array of doubles in row major.
IDoubleArray spectralArray = new DoubleArray();
spectralArray.Add(0.1);
spectralArray.Add(0.9);
spectralArray.Add(0.0);
spectralArray.Add(0.3);
spectralArray.Add(0.0);
spectralArray.Add(0.7);
spectralArray.Add(0.1);
spectralArray.Add(0.1);
spectralArray.Add(0.8);
rasterFunctionArguments.ConversionMatrix = spectralArray;

// Create the Raster Function object.
IRasterFunction rasterFunction = new SpectralConversionFunctionClass();
// 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\SpectralConversion.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 ISpectralConversionFunctionArguments
rasterFunctionArguments = New SpectralConversionFunctionArgumentsClass()
' The input data can be of type IRasterDataset, IRasterBand, or IRaster.
rasterFunctionArguments.Raster = inputData
' Specify the spectral matrix as an array of doubles in row major.
Dim spectralArray As IDoubleArray
spectralArray = New DoubleArray()
spectralArray.Add(0.1)
spectralArray.Add(0.9)
spectralArray.Add(0.0)
spectralArray.Add(0.3)
spectralArray.Add(0.0)
spectralArray.Add(0.7)
spectralArray.Add(0.1)
spectralArray.Add(0.1)
spectralArray.Add(0.8)
rasterFunctionArguments.ConversionMatrix = spectralArray

' Create the Raster Function object.
Dim rasterFunction As IRasterFunction
rasterFunction = New SpectralConversionFunctionClass()
' 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\SpectralConversion.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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