Use ISpatialReferenceFactory::CreatePredefinedDatums

Summary

This code sample shows how to make a list of all the predefined datums available in ArcGIS using Visual Basic for Applications and ArcObjects.

Procedure

1. Open ArcMap.
2. Open the Visual Basic Editor.
   
   
   In ArcMap, select Tools > Macros > Visual Basic Editor.
   
   
3. In the Project Explorer window, expand Project.mxt and select ArcMap Objects > ThisDocument, then right-click and select View Code.
   
   
   

   Note:
   Code in the project's ThisDocument code module will only run in the current map document. If you want to store the code in all your map documents, open the Normal.mxt ThisDocument code module instead. 

   
   
4. Paste the following code into the code module:
   
   

   Code:
   Sub ListDatums()
   Dim pSRFactory As ISpatialReferenceFactory
   Set pSRFactory = New SpatialReferenceEnvironment
   Dim pDatumList As ISet
   Set pDatumList = pSRFactory.CreatePredefinedDatums
   
   'Get a list of the predefined datums.
   Dim pDatum As IDatum
   Set pDatum = pDatumList.Next
   Do Until pDatum Is Nothing
     Debug.Print pDatum.Name
     Debug.Print pDatum.FactoryCode
     Set pDatum = pDatumList.Next
   Loop
   
   End Sub

   
   
5. Close the Visual Basic Editor.
6. Run the code.
   
   
   A. Click Tools > Macros > Macros to display the Macros dialog box.
   B. Select a macro and click Run.