Create MathOp Round Down Raster Snippet (ArcObjects .NET 10.6 SDK)
ArcObjects Library Reference

Create MathOp Round Down Raster Snippet

Create an raster that is the round down (next lower) whole number from an input GeoDataset.

[C#]
/// <summary>
/// Create an raster that is the round down (next lower) whole number from an input GeoDataset.
/// </summary>
/// <param name="geoDataset">An IGeoDataset interface that has cell values that need to have the next lower whole number value computed.</param>
/// <returns>An IGeoDataset interface that contains rounded down values of the input raster.</returns>
/// <remarks>
/// Note: the input geoDataset must be of Type IRaster, IRasterDataset, IRasterBand, or IRasterDescriptor.
/// 
/// For information about the IMathOp.RoundDown Method see:
/// http://edndoc.esri.com/arcobjects/9.2/ComponentHelp/esriSpatialAnalyst/IMathOp_RoundDown.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 CreateMathOpRoundDownRaster(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)
    {

        // Create the RasterMathOps object                      
        ESRI.ArcGIS.SpatialAnalyst.IMathOp mathOp=new ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass();

        // Create the output raster object                      
        ESRI.ArcGIS.Geodatabase.IGeoDataset geoDataset_output=mathOp.RoundDown(geoDataset);

        return geoDataset_output;

    }
    else
    {

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

    }

}
[Visual Basic .NET]
''' <summary>
''' Create an raster that is the round down (next lower) whole number from an input GeoDataset.
''' </summary>
''' <param name="geoDataset">An IGeoDataset interface that has cell values that need to have the next lower whole number value computed.</param>
''' <returns>An IGeoDataset interface that contains rounded down values of the input raster.</returns>
''' <remarks>
''' Note: the input geoDataset must be of Type IRaster, IRasterDataset, IRasterBand, or IRasterDescriptor.
''' 
''' For information about the IMathOp.RoundDown Method see:
''' http://edndoc.esri.com/arcobjects/9.2/ComponentHelp/esriSpatialAnalyst/IMathOp_RoundDown.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 CreateMathOpRoundDownRaster(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) Then

    ' Create the RasterMathOps object                   
    Dim mathOp As ESRI.ArcGIS.SpatialAnalyst.IMathOp=New ESRI.ArcGIS.SpatialAnalyst.RasterMathOpsClass

    ' Create the output raster object                   
    Dim geoDataset_output As ESRI.ArcGIS.Geodatabase.IGeoDataset=mathOp.RoundDown(geoDataset)

    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