How to open a terrain dataset

Opening a terrain dataset

This topic shows how to get a reference to a terrain dataset from a feature workspace:
  1. Obtain a handle to the feature workspace containing the terrain dataset. See the following code example:
[C#] 
// 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)
  1. Get the feature dataset inside the workspace that contains the terrain dataset. See the following code example:
[C#] 
// 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")
  1. From the feature dataset, open the terrain. See the following code example:
[C#] 
// 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
ArcGIS for Desktop Basic ArcGIS for Desktop Basic
ArcGIS for Desktop Standard ArcGIS for Desktop Standard
ArcGIS for Desktop Advanced ArcGIS for Desktop Advanced
Engine Developer Kit Engine