Opening a terrain dataset
This topic shows how to get a reference to a terrain dataset from a feature workspace:
- Obtain a handle to the feature workspace containing the terrain dataset. See the following code example:
// Get a feature workspace that contains a terrain.
IWorkspaceFactory WSFact = new FileGDBWorkspaceFactoryClass();
IFeatureWorkspace FWS;
FWS = WSFact.OpenFromFile("C:\\project\\terrain.gdb", 0)as IFeatureWorkspace;
[VB.NET]
' Get a feature workspace that contains a terrain.
Dim WSFact As IWorkspaceFactory = New FileGDBWorkspaceFactoryClass()
Dim FWS As IFeatureWorkspace
FWS = TryCast(WSFact.OpenFromFile("C:\project\terrain.gdb", 0), IFeatureWorkspace)
- Get the feature dataset inside the workspace that contains the terrain dataset. See the following code example:
// From the workspace, get a feature dataset that contains a terrain.
IFeatureDataset FDS = FWS.OpenFeatureDataset("myFDS");
[VB.NET]
' From the workspace, get a feature dataset that contains a terrain.
Dim FDS As IFeatureDataset = FWS.OpenFeatureDataset("myFDS")
- From the feature dataset, open the terrain. See the following code example:
// Open the terrain.
IFeatureDatasetExtensionContainer EC = FDS as IFeatureDatasetExtensionContainer;
IDatasetContainer3 DC = EC.FindExtension(esriDatasetType.esriDTTerrain)as
IDatasetContainer3;
ITerrain Terrain = DC.get_DatasetByName(esriDatasetType.esriDTTerrain, "myTerrain")
as ITerrain;
[VB.NET]
' Open the terrain.
Dim EC As IFeatureDatasetExtensionContainer = TryCast(FDS, IFeatureDatasetExtensionContainer)
Dim DC As IDatasetContainer3 = TryCast(EC.FindExtension(esriDatasetType.esriDTTerrain), IDatasetContainer3)
Dim Terrain As ITerrain = TryCast(DC.get_DatasetByName(esriDatasetType.esriDTTerrain, "myTerrain"), ITerrain)
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 |