Create DistanceOp EucDistanceFull Direction Raster Snippet (ArcObjects .NET 10.6 SDK)
ArcObjects Library Reference

Create DistanceOp EucDistanceFull Direction Raster Snippet

Create a raster that has Euclidean direction to the closest source.

[C#]
/// <summary>
/// Create a raster that has Euclidean direction to the closest source.
/// </summary>
/// <param name="geoDataset">An IGeoDataset interface that identifies those cells or locations whose values are assigned to the output cell locations that they are closest to.</param>
/// <returns>An IGeoDataset interface that has Euclidean direction to the closest source.</returns>
/// <remarks>
/// Note: the input geoDataset's must be of Type IRaster, IRasterDataset, IRasterBand, IRasterDescriptor or IFeatureClass.
/// 
/// The IDistanceOp.EucDistanceFull Method has two options (maxDistance and valueRaster) that 
/// will greatly vary the output raster. Thess values will need to be adjusted for your application to achieve 
/// the desired results.
/// 
/// For information about the IDistanceOp.EucDistanceFull Method see:
/// http://edndoc.esri.com/arcobjects/9.2/ComponentHelp/esriSpatialAnalyst/IDistanceOp_EucDistanceFull.htm
/// 
/// For more information on working with the ArcGIS Spatial Anaylst objects see:
/// http://edndoc.esri.com/arcobjects/9.2/CPP_VB6_VBA_VCPP_Doc/COM/VB6/working/work_rasters/sptl_analyst_objs.htm
/// </remarks>
public ESRI.ArcGIS.Geodatabase.IGeoDataset CreateDistanceOpEucDistanceFullDirectionRaster(ESRI.ArcGIS.Geodatabase.IGeoDataset geoDataset)
{

    if (geoDataset is ESRI.ArcGIS.Geodatabase.IRaster | geoDataset is ESRI.ArcGIS.Geodatabase.IRasterDataset | geoDataset is ESRI.ArcGIS.DataSourcesRaster.IRasterBand | geoDataset is ESRI.ArcGIS.GeoAnalyst.IRasterDescriptor | geoDataset is ESRI.ArcGIS.Geodatabase.IFeatureClass)
    {

        // Create the RasterDistanceOp object                   
        ESRI.ArcGIS.SpatialAnalyst.IDistanceOp distanceOp=new ESRI.ArcGIS.SpatialAnalyst.RasterDistanceOpClass();

        // Declare the output raster object                             
        //Note: Adjust the IDistanceOp.EucDistanceFull method options to suit your applications need.
        object object_missing1=System.Type.Missing;
        object object_missing2=System.Type.Missing;
        ESRI.ArcGIS.Geodatabase.IGeoDataset geoDataset_result=distanceOp.EucDistanceFull(geoDataset, false, true, false, ref object_missing1, ref object_missing2);

        // Access the Euclidean direction raster from the output generated
        ESRI.ArcGIS.DataSourcesRaster.IRasterBandCollection rasterBandCollection=(ESRI.ArcGIS.DataSourcesRaster.IRasterBandCollection)geoDataset_result; // Explicit Cast
        ESRI.ArcGIS.DataSourcesRaster.IRasterBand rasterBand=rasterBandCollection.Item(1);
        ESRI.ArcGIS.Geodatabase.IGeoDataset geoDataset_output=(ESRI.ArcGIS.Geodatabase.IGeoDataset)rasterBand; // Explicit Cast

        return geoDataset_output;
    }
    else
    {

        //Invalid type of GeoDataset for this process
        return null;

    }

}
[Visual Basic .NET]
''' <summary>
''' Create a raster that has Euclidean direction to the closest source.
''' </summary>
''' <param name="geoDataset">An IGeoDataset interface that identifies those cells or locations whose values are assigned to the output cell locations that they are closest to.</param>
''' <returns>An IGeoDataset interface that has Euclidean direction to the closest source.</returns>
''' <remarks>
''' Note: the input geoDataset's must be of Type IRaster, IRasterDataset, IRasterBand, IRasterDescriptor or IFeatureClass.
''' 
''' The IDistanceOp.EucDistanceFull Method has two options (maxDistance and valueRaster) that 
''' will greatly vary the output raster. Thess values will need to be adjusted for your application to achieve 
''' the desired results.
''' 
''' For information about the IDistanceOp.EucDistanceFull Method see:
''' http://edndoc.esri.com/arcobjects/9.2/ComponentHelp/esriSpatialAnalyst/IDistanceOp_EucDistanceFull.htm
''' 
''' For more information on working with the ArcGIS Spatial Anaylst objects see:
''' http://edndoc.esri.com/arcobjects/9.2/CPP_VB6_VBA_VCPP_Doc/COM/VB6/working/work_rasters/sptl_analyst_objs.htm
''' </remarks>
Public Function CreateDistanceOpEucDistanceFullDirectionRaster(ByVal geoDataset As ESRI.ArcGIS.Geodatabase.IGeoDataset) As ESRI.ArcGIS.Geodatabase.IGeoDataset

  If (TypeOf geoDataset Is ESRI.ArcGIS.Geodatabase.IRaster _
  Or TypeOf geoDataset Is ESRI.ArcGIS.Geodatabase.IRasterDataset _
  Or TypeOf geoDataset Is ESRI.ArcGIS.DataSourcesRaster.IRasterBand _
  Or TypeOf geoDataset Is ESRI.ArcGIS.GeoAnalyst.IRasterDescriptor _
  Or TypeOf geoDataset Is ESRI.ArcGIS.Geodatabase.IFeatureClass) Then

    ' Create the RasterDistanceOp object                        
    Dim distanceOp As ESRI.ArcGIS.SpatialAnalyst.IDistanceOp=New ESRI.ArcGIS.SpatialAnalyst.RasterDistanceOpClass

    ' Declare the output raster object                          
    'Note: Adjust the IDistanceOp.EucDistanceFull method options to suit your applications need.
    Dim object_missing1 As System.Object=System.Type.Missing
    Dim object_missing2 As System.Object=System.Type.Missing
    Dim geoDataset_result As ESRI.ArcGIS.Geodatabase.IGeoDataset=distanceOp.EucDistanceFull(geoDataset, False, True, False, object_missing1, object_missing2)

    ' Access the Euclidean direction raster from the output generated
    Dim rasterBandCollection As ESRI.ArcGIS.DataSourcesRaster.IRasterBandCollection=CType(geoDataset_result, ESRI.ArcGIS.DataSourcesRaster.IRasterBandCollection) ' Explicit Cast
    Dim rasterBand As ESRI.ArcGIS.DataSourcesRaster.IRasterBand=rasterBandCollection.Item(1)
    Dim geoDataset_output As ESRI.ArcGIS.Geodatabase.IGeoDataset=CType(rasterBand, ESRI.ArcGIS.Geodatabase.IGeoDataset) ' Explicit Cast

    Return geoDataset_output
  Else

    'Invalid type of GeoDataset for this process
    Return Nothing

  End If

End Function

Additional Requirements
  • The code in this document requires the following References added to the Visual Studio project:
  • ESRI.ArcGIS.DataSourcesRaster
  • ESRI.ArcGIS.GeoAnalyst
  • ESRI.ArcGIS.Geodatabase
  • ESRI.ArcGIS.SpatialAnalyst
  • ESRI.ArcGIS.System
  • System