Creating a Slope function dataset
To create a Slope function dataset, follow these steps:
- Create the Function Arguments object.
- Set the Z factor. The Z factor is the scale applied to the elevation values.
- Create a Raster Function object.
- Create a Function Raster Dataset object.
- Create a name object for the function raster dataset.
- Specify the output file name for the new dataset.
- Initialize the new function raster dataset with the raster function and its arguments.
The following code example shows how to create a Slope function raster dataset by applying the Slope raster function to an image:
[C#]
// Create the Function Arguments object.
ISlopeFunctionArguments rasterFunctionArguments = (ISlopeFunctionArguments)new
SlopeFunctionArguments();
// The input data can be of type IRasterDataset, IRasterBand, or IRaster.
rasterFunctionArguments.DEM = inputData;
// The Z factor is the scaling factor applied to a DEM that is not in a geographic coordinate system.
rasterFunctionArguments.ZFactor = 1 / 111111.0;
// Create the Raster Function object.
IRasterFunction rasterFunction = new SlopeFunction();
// 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\SlopeFunction.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 ISlopeFunctionArguments
rasterFunctionArguments = New SlopeFunctionArguments()
' The input data can be of type IRasterDataset, IRasterBand, or IRaster.
rasterFunctionArguments.DEM = inputData
' The Z factor is the scaling factor applied to a DEM that is not in a geographic coordinate system.
rasterFunctionArguments.ZFactor = 1 / 111111.0
' Create the Raster Function object.
Dim rasterFunction As IRasterFunction
rasterFunction = New SlopeFunction()
' 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\SlopeFunction.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):
ESRI.ArcGIS.DataSourcesRaster ESRI.ArcGIS.Geodatabase ESRI.ArcGIS.System (ESRI.ArcGIS.esriSystem)
| Development licensing | Deployment licensing |
|---|---|
| ArcGIS for Desktop Advanced | ArcGIS for Desktop Advanced |
| ArcGIS for Desktop Standard | ArcGIS for Desktop Standard |
| ArcGIS for Desktop Basic | ArcGIS for Desktop Basic |