topic Re: Get Raster Layer from Path in ArcObjects SDK Questions

Get Raster Layer from Path

StanStas — Sun, 26 Aug 2012 16:31:25 GMT

Hi,

I need advise. I have raster data stored in File Geodatabase. I'd like to access raster layer. I've done this for vector layer in same GDB, but don't know how to access raster data.

    Public Function GetLayer(ByVal path As String) As IFeatureLayer          Dim strOutputFileName As String = System.IO.Path.GetFileName(path)          Dim strOutputFolderName1 As String = System.IO.Path.GetDirectoryName(path)          Dim strOutputFolderName As String = strOutputFolderName1.Remove(strOutputFolderName1.Length - 1)          Dim pWorkspaceFactory As IWorkspaceFactory = New ESRI.ArcGIS.DataSourcesGDB.FileGDBWorkspaceFactoryClass         Dim pFeatureWorkspace As IFeatureWorkspace = pWorkspaceFactory.OpenFromFile(strOutputFolderName, 0)          Dim pFLayer As IFeatureLayer = New FeatureLayer         pFLayer.FeatureClass = pFeatureWorkspace.OpenFeatureClass(strOutputFileName)          Return pFLayer      End Function

Easy, but I'm stuck. Thanks for help!

Re: Get Raster Layer from Path

DuncanHornby — Sun, 26 Aug 2012 22:35:39 GMT

Stan,

It's the IRasterWorkspaceEx Interface you need to be using, search help on this and you will find an example.

Duncan

Re: Get Raster Layer from Path

StanStas — Sat, 11 Dec 2021 08:29:07 GMT

Thanks Duncan, it's working.

    Public Function GetFGDBRasterLayer(ByVal path As String) As IRasterLayer

        Dim workspaceFactory As IWorkspaceFactory2 = New FileGDBWorkspaceFactoryClass()
        Dim rasterWorkspace As IRasterWorkspaceEx = CType(workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(path), 0), IRasterWorkspaceEx)
        Dim rasterDataset As IRasterDataset = rasterWorkspace.OpenRasterDataset(System.IO.Path.GetFileName(path))
        Dim rasterLayer As ESRI.ArcGIS.Carto.IRasterLayer = New ESRI.ArcGIS.Carto.RasterLayerClass
        rasterLayer.CreateFromDataset(rasterDataset)
        Return rasterLayer

    End Function

Re: Get Raster Layer from Path

StanStas — Sun, 16 Sep 2012 09:08:12 GMT

One more question, which is close to the first one 🙂

Before I will get layer from path, I'd like to know, if data source (in File GDB) is raster or vector. How to do that? 🙂

Thanks