How to access a raster dataset

In this topic

• Accessing a file-based raster dataset
• Accessing a geodatabase raster dataset

Accessing a file-based raster dataset

1. Open a raster file workspace.
2. Open a file raster dataset.

static IRasterDataset OpenFileRasterDataset(string folderName, string datasetName)
{
    //Open a raster file workspace.
    IWorkspaceFactory workspaceFactory=new RasterWorkspaceFactoryClass();
    IRasterWorkspace rasterWorkspace=(IRasterWorkspace)
        workspaceFactory.OpenFromFile(folderName, 0);

    //Open a file raster dataset. 
    IRasterDataset rasterDataset=rasterWorkspace.OpenRasterDataset(datasetName);
    return rasterDataset;
}

Public Function OpenFileRasterDataset(ByVal folderName As String, ByVal datasetName As String) As IRasterDataset
    'Open a raster file workspace.
    Dim workspaceFactory As IWorkspaceFactory=New RasterWorkspaceFactoryClass()
    Dim rasterWorkspace As IRasterWorkspace=CType(workspaceFactory.OpenFromFile(folderName, 0), IRasterWorkspace)
    
    'Open a file raster dataset.
    Dim rasterDataset As IRasterDataset=rasterWorkspace.OpenRasterDataset(datasetName)
    
    Return rasterDataset
End Function

Accessing a geodatabase raster dataset

static IRasterDataset OpenGDBRasterDataset(IRasterWorkspaceEx rasterWorkspaceEx,
    string datasetName)
{
    //Open a raster dataset in a geodatabase (PGDB, FGDB, or ArcSDE).
    return rasterWorkspaceEx.OpenRasterDataset(datasetName);
}

Public Function OpenGDBRasterDataset(ByVal rasterWorkspaceEx As IRasterWorkspaceEx, ByVal datasetName As String) As IRasterDataset
    'Open a raster dataset in a geodatabase (PGDB, FGDB, or ArcSDE).
    Return rasterWorkspaceEx.OpenRasterDataset(datasetName)
End Function

See Also:

• ESRI.ArcGIS.DataSourcesGDB
• ESRI.ArcGIS.DataSourcesRaster
• ESRI.ArcGIS.Geodatabase
• ESRI.ArcGIS.System (ESRI.ArcGIS.esriSystem)