Creating a predefined vertical coordinate system (ArcObjects .NET 10.6 SDK)
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Creating a predefined vertical coordinate system


Summary
This topic shows how to create an existing vertical coordinate system (VCS) or a list of an existing VCS.

About creating a predefined vertical coordinate system

The ISpatialReferenceFactory3 interface provides access for creating the VCS available in ArcGIS. You can return a single VCS with ISpatialReferenceFactory3.CreateVerticalCoordinateSystem. Similar to other coordinate system types, a list of VCS can be returned using ISpatialReferenceFactory3.CreatePredefinedVerticalCoordinateSystems.
See the following code example:
[C#]
private static void GetVCSList()
{

    // Set up the SpatialReferenceEnvironment.
    // SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.

    Type factoryType=Type.GetTypeFromProgID(
        "esriGeometry.SpatialReferenceEnvironment");
    System.Object obj=Activator.CreateInstance(factoryType);
    ISpatialReferenceFactory3 srFact3=obj as ISpatialReferenceFactory3;

    ISet vcsSet=srFact3.CreatePredefinedVerticalCoordinateSystems();
    vcsSet.Reset();
    IVerticalCoordinateSystem vcs;

    for (int i=0; i < vcsSet.Count; i++)
    {
        vcs=vcsSet.Next()as IVerticalCoordinateSystem;
        Console.WriteLine("VCS Name: {0} (Code: {1})", vcs.Name, vcs.FactoryCode);
    }

}
[VB.NET]
Private Sub GetVCSList()
    
    ' Set up the SpatialReferenceEnvironment.
    ' SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.
    
    ' Set up the SpatialReferenceEnvironment.
    ' SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.
    Dim factoryType As Type=Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment")
    Dim spatialReferenceFactory As ISpatialReferenceFactory3=CType(Activator.CreateInstance(factoryType), ISpatialReferenceFactory3)
    
    Dim vcsSet As ISet=spatialReferenceFactory.CreatePredefinedVerticalCoordinateSystems()
    vcsSet.Reset()
    Dim vcs As IVerticalCoordinateSystem
    
    For i As Integer=0 To vcsSet.Count - 1
        vcs=CType(vcsSet.Next(), IVerticalCoordinateSystem)
        Console.WriteLine("VCS Name: {0} (Code: {1})", vcs.Name, vcs.FactoryCode)
    Next i
    
End Sub
The list of predefined vertical datums can also be accessed using a method similar to ISpatialReferenceFactory3.CreatePredefinedVerticalCoordinateSystems. The following code example retrieves the list of vertical datums defined by ArcGIS. This method is useful when populating a control with all the available VCS definitions.
[C#]
private static void GetVerticalDatumList()
{
    // Set up the SpatialReferenceEnvironment.
    // SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.

    Type t=Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
    System.Object obj=Activator.CreateInstance(t);
    ISpatialReferenceFactory srFact=obj as ISpatialReferenceFactory;
    ISpatialReferenceFactory3 srFact3=srFact as ISpatialReferenceFactory3;

    ISet vDatumSet=srFact3.CreatePredefinedVerticalDatums();
    vDatumSet.Reset();
    IVerticalDatum vDatum;

    for (int i=0; i < vDatumSet.Count; i++)
    {
        vDatum=vDatumSet.Next()as IVerticalDatum;
        Console.WriteLine("VDatum Name: {0} (Code: {1})", vDatum.Name,
            vDatum.FactoryCode);
    }
}
[VB.NET]
Private Sub GetVerticalDatumList()
    ' Set up the SpatialReferenceEnvironment.
    ' SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.
    
    Dim t As Type=Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment")
    Dim obj As System.Object=Activator.CreateInstance(t)
    Dim srFact As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory=obj
    Dim srFact3 As ISpatialReferenceFactory3=srFact
    
    Dim vDatumSet As ISet=srFact3.CreatePredefinedVerticalDatums();
    vDatumSet.Reset()
    Dim vDatum As IVerticalDatum
    
    For i As Integer=0 To vDatumSet.Count - 1
        vDatum=vDatumSet.Next()
        Console.WriteLine("VDatum Name: {0} (Code: {1})", vDatum.Name, vDatum.FactoryCode)
    Next i
End Sub
If you know the VCS or vertical datum you want to work with, use ISpatialReferenceFactory3.CreateVerticalCoordinateSystem or ISpatialReferenceFactory3.CreateVerticalDatum, then pass in the appropriate factory code. See the following code example:
[C#]
private void CreateVerticalReferenceSystem()
{
    // Set up the SpatialReferenceEnvironment.
    // SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.

    Type t=Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
    System.Object obj=Activator.CreateInstance(t);
    ISpatialReferenceFactory3 srFact3=obj as ISpatialReferenceFactory3;

    // Dimension a vertical datum and VCS.
    // Use the enumerations to create instances of the predefined objects.

    IVerticalDatum verticalDatum=srFact3.CreateVerticalDatum((int)
        esriSRVerticalDatumType.esriSRVertDatum_Alicante);
    IVerticalCoordinateSystem verticalCoordinateSystem =
        srFact3.CreateVerticalCoordinateSystem((int)
        esriSRVerticalCSType.esriSRVertCS_Alicante);
}
[VB.NET]
Private Sub CreateVerticalReferenceSystem()
    ' Set up the SpatialReferenceEnvironment.
    ' SpatialReferenceEnvironment is a singleton object and needs to use the Activator class.
    
    Dim t As Type=Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment")
    Dim obj As System.Object=Activator.CreateInstance(t)
    Dim srFact3 As ESRI.ArcGIS.Geometry.ISpatialReferenceFactory3=obj
    
    ' Dimension a vertical datum and VCS.
    ' Use the enumerations to create instances of the predefined objects.
    
    Dim verticalDatum As IVerticalDatum=srFact3.CreateVerticalDatum(esriSRVerticalDatumType.esriSRVertDatum_Alicante)
    Dim verticalCoordinateSystem As IVerticalCoordinateSystem=srFact3.CreateVerticalCoordinateSystem(esriSRVerticalCSType.esriSRVertCS_Alicante)
End Sub


See Also:

Creating a custom vertical coordinate system




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 Desktop Basic ArcGIS Desktop Basic
ArcGIS Desktop Standard ArcGIS Desktop Standard
ArcGIS Desktop Advanced ArcGIS Desktop Advanced
Engine Developer Kit Engine