About the Create a Function Raster dataset Sample
[C#]
CreateFunctionRasterDataset.cs
using System;
using ESRI.ArcGIS.DataSourcesRaster;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
namespace RasterSamples
{
class CreateFunctionRasterDataset
{
[STAThread]
static void Main(string[] args)
{
ESRI.ArcGIS.esriSystem.AoInitialize aoInit;
#region Initialize License
try
{
Console.WriteLine("Obtaining license");
ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Desktop);
aoInit = new AoInitializeClass();
esriLicenseStatus licStatus = aoInit.Initialize(esriLicenseProductCode.esriLicenseProductCodeBasic);
Console.WriteLine("Ready with license.");
}
catch (Exception exc)
{
// If it fails at this point, shutdown the test and ignore any subsequent errors.
Console.WriteLine(exc.Message);
return;
}
#endregion
try
{
// Specify input directory and dataset name.
string inputWorkspace = @"C:\Data";
string inputDatasetName = "8bitSampleImage.tif";
// Specify output filename.
string outputDataset = @"c:\Temp\testArithmaticCS.afr";
// Open the Raster Dataset
Type factoryType = Type.GetTypeFromProgID("esriDataSourcesRaster.RasterWorkspaceFactory");
IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType);
IWorkspace workspace = workspaceFactory.OpenFromFile(inputWorkspace, 0);
IRasterWorkspace rasterWorkspace = (IRasterWorkspace)workspace;
IRasterDataset myRasterDataset = rasterWorkspace.OpenRasterDataset(inputDatasetName);
// Create the Function Arguments object
IArithmeticFunctionArguments rasterFunctionArguments =
(IArithmeticFunctionArguments)new ArithmeticFunctionArguments();
// Set the parameters for the function:
// Specify the operation as addition (esriRasterPlus)
rasterFunctionArguments.Operation = esriRasterArithmeticOperation.esriRasterPlus;
// Specify the first operand, i.e. the Raster Dataset opened above.
rasterFunctionArguments.Raster = myRasterDataset;
// For the second operand, create an array of double values
// containing the scalar value to be used as the second operand
// to each band of the input dataset.
// The number of values in the array should equal the number
// of bands of the input dataset.
double[] scalars = { 128.0, 128.0, 128.0 };
// Create a new Scalar object and specify
// the array as its value.
IScalar scalarVals = new ScalarClass();
scalarVals.Value = scalars;
// Specify the scalar object as the second operand.
rasterFunctionArguments.Raster2 = scalarVals;
// Create the Raster Function object.
IRasterFunction rasterFunction = new ArithmeticFunction();
rasterFunction.PixelType = rstPixelType.PT_USHORT;
// 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 filename for the new dataset (including
// the .afr extension at the end).
functionRasterDatasetName.FullName = outputDataset;
functionRasterDataset.FullName = (IName)functionRasterDatasetName;
// Initialize the new Function Raster Dataset with the Raster Function
// and its arguments.
functionRasterDataset.Init(rasterFunction, rasterFunctionArguments);
// QI for the Temporary Dataset interface
ITemporaryDataset myTempDset = (ITemporaryDataset)functionRasterDataset;
// and make it a permanent dataset. This creates the afr file.
myTempDset.MakePermanent();
// Report
Console.WriteLine("Success.");
Console.WriteLine("Press any key...");
Console.ReadKey();
// Shutdown License
aoInit.Shutdown();
}
catch (Exception exc)
{
// Report
Console.WriteLine("Exception Caught while creating Function Raster Dataset. " + exc.Message);
Console.WriteLine("Failed.");
Console.WriteLine("Press any key...");
Console.ReadKey();
// Shutdown License
aoInit.Shutdown();
}
}
}
}
[Visual Basic .NET]
CreateFunctionRasterDataset.vb
Imports ESRI.ArcGIS.DataSourcesRaster
Imports ESRI.ArcGIS.esriSystem
Imports ESRI.ArcGIS.Geodatabase
Namespace RasterSamples
Class CreateFunctionRasterDataset
<STAThread> _
Friend Shared Sub Main(args As String())
Dim aoInit As ESRI.ArcGIS.esriSystem.AoInitialize
'#Region "Initialize License"
Try
Console.WriteLine("Obtaining license")
ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Desktop)
aoInit = New AoInitializeClass()
Dim licStatus As esriLicenseStatus = aoInit.Initialize(esriLicenseProductCode.esriLicenseProductCodeBasic)
Console.WriteLine("Ready with license.")
Catch exc As Exception
' If it fails at this point, shutdown the test and ignore any subsequent errors.
Console.WriteLine(exc.Message)
Return
End Try
'#End Region
Try
' Specify input directory and dataset name.
Dim inputWorkspace As String = "C:\Data"
Dim inputDatasetName As String = "8bitSampleImage.tif"
' Specify output filename.
Dim outputDataset As String = "c:\Temp\testArithmaticVB.afr"
' Open the Raster Dataset
Dim factoryType As Type = Type.GetTypeFromProgID("esriDataSourcesRaster.RasterWorkspaceFactory")
Dim workspaceFactory As IWorkspaceFactory = DirectCast(Activator.CreateInstance(factoryType), IWorkspaceFactory)
Dim workspace As IWorkspace = workspaceFactory.OpenFromFile(inputWorkspace, 0)
Dim rasterWorkspace As IRasterWorkspace = DirectCast(workspace, IRasterWorkspace)
Dim myRasterDataset As IRasterDataset = rasterWorkspace.OpenRasterDataset(inputDatasetName)
' Create the Function Arguments object
Dim rasterFunctionArguments As IArithmeticFunctionArguments = DirectCast(New ArithmeticFunctionArguments(), IArithmeticFunctionArguments)
' Set the parameters for the function:
' Specify the operation as addition (esriRasterPlus)
rasterFunctionArguments.Operation = esriRasterArithmeticOperation.esriRasterPlus
' Specify the first operand, i.e. the Raster Dataset opened above.
rasterFunctionArguments.Raster = myRasterDataset
' For the second operand, create an array of double values
' containing the scalar value to be used as the second operand
' to each band of the input dataset.
' The number of values in the array should equal the number
' of bands of the input dataset.
Dim scalars As Double() = {128.0, 128.0, 128.0}
' Create a new Scalar object and specify
' the array as its value.
Dim scalarVals As IScalar = New ScalarClass()
scalarVals.Value = scalars
' Specify the scalar object as the second operand.
rasterFunctionArguments.Raster2 = scalarVals
' Create the Raster Function object.
Dim rasterFunction As IRasterFunction = New ArithmeticFunction()
rasterFunction.PixelType = rstPixelType.PT_USHORT
' Create the Function Raster Dataset Object.
Dim functionRasterDataset As IFunctionRasterDataset = New FunctionRasterDataset()
' Create a name object for the Function Raster Dataset.
Dim functionRasterDatasetName As IFunctionRasterDatasetName = DirectCast(New FunctionRasterDatasetName(), IFunctionRasterDatasetName)
' Specify the output filename for the new dataset (including
' the .afr extension at the end).
functionRasterDatasetName.FullName = outputDataset
functionRasterDataset.FullName = DirectCast(functionRasterDatasetName, IName)
' Initialize the new Function Raster Dataset with the Raster Function
' and its arguments.
functionRasterDataset.Init(rasterFunction, rasterFunctionArguments)
' QI for the Temporary Dataset interface
Dim myTempDset As ITemporaryDataset = DirectCast(functionRasterDataset, ITemporaryDataset)
' and make it a permanent dataset. This creates the afr file.
myTempDset.MakePermanent()
' Report
Console.WriteLine("Success.")
Console.WriteLine("Press any key...")
Console.ReadKey()
' Shutdown License
aoInit.Shutdown()
Catch exc As Exception
' Report
Console.WriteLine("Exception Caught while creating Function Raster Dataset. " & exc.Message)
Console.WriteLine("Failed.")
Console.WriteLine("Press any key...")
Console.ReadKey()
' Shutdown License
aoInit.Shutdown()
End Try
End Sub
End Class
End Namespace