Horizonatal and Vertical datum transformation.
Interfaces
| Interfaces | Description | 
|---|---|
| IClone (esriSystem) | Provides access to members that control cloning of objects. | 
| IDatumTransformationInfo | Provides common properties for GeoTransformation and HVCompositeDatumTransformation | 
| IHVCompositeDatumTransformation | Provides a combined Horizontal and Vertical transformation of Geographic Datum. | 
| IPersist (esriSystem) | |
| IPersistStream (esriSystem) | |
| ITransformation | Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on. | 
| IXMLSerialize (esriSystem) | Provides access to members that XML serialize and deserialize an object to/from XML. | 
| IXMLVersionSupport (esriSystem) | Provides access to members that help in serializing an object to different namespaces (versions). |