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


About creating a predefined geographic coordinate system

The ISpatialReferenceFactory interface provides access for creating a geographic coordinate system (GCS) in ArcGIS. You can return a single GCS with ISpatialReferenceFactory.CreateGeographicCoordinateSystem. Lists of the supported GCS are available in the esriSRGeoCSType, esriSRGeoCS2Type, and esriSRGeoCS3Type enumerations.
See the following code example:
[C#]
private void CreateGeographicCoordinateSystem()
{
    // 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;

    // Use the enumeration to create an instance of the predefined object.

    IGeographicCoordinateSystem geographicCS =
        srFact.CreateGeographicCoordinateSystem((int)
        esriSRGeoCSType.esriSRGeoCS_NAD1983);
}
[VB.NET]
Private Sub CreateGeographicReferenceSystem()
    ' 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
    
    ' Use the enumeration to create an instance of the predefined object.
    
    Dim geographicCS As IGeographicCoordinateSystem=srFact.CreateGeographicCoordinateSystem(esriSRGeoCSType.esriSRGeoCS_NAD1983)
End Sub


See Also:

Creating a custom geographic 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
Engine Developer Kit Engine
ArcGIS Desktop Advanced ArcGIS Desktop Advanced
ArcGIS Desktop Standard ArcGIS Desktop Standard
ArcGIS Desktop Basic ArcGIS Desktop Basic