How to erase a portion of a geodatabase raster dataset

Erasing a portion of a geodatabase raster dataset

This topic shows how to erase a portion of a raster dataset stored in a file geodatabase or an ArcSDE geodatabase. The pixels in the erase extent changes to NoData pixels after the operation. Do the following steps to erase a portion of a geodatabase raster dataset:
  1. Get IRasterDatasetEdit for the erase operation.
  2. Cast input IRasterDataset to IRasterDatasetEdit.

    See the following code example:
[C#] 
static void ErasePortionOfGDBRaster(IRasterDataset rasterDataset, IEnvelope
    eraseExtent)
{
    //IRasterDatasetEdit is needed for the erase operation. 
    //Cast input IRasterDataset to IRasterDatasetEdit.
    IRasterDatasetEdit rasterDatasetEdit = (IRasterDatasetEdit)rasterDataset;
    rasterDatasetEdit.Erase(eraseExtent);
}
[VB.NET] 
Public Sub ErasePortionOfGDBRaster(ByVal rasterDataset As IRasterDataset, ByVal eraseExtent As IEnvelope)
    'IRasterDatasetEdit is needed for the erase operation.
    'Cast input IRasterDataset to IRasterDatasetEdit.
    Dim rasterDatasetEdit As IRasterDatasetEdit = CType(rasterDataset, IRasterDatasetEdit)
    rasterDatasetEdit.Erase(eraseExtent)
End Sub


See Also:

How to access a raster dataset



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):
Development licensing Deployment licensing
ArcView ArcView
ArcEditor ArcEditor
ArcInfo ArcInfo
Engine Developer Kit Engine Runtime