| Class | Description | 
|---|---|
| GeographicCS | 
 Represents the Geographic (Datum) coordinate
 system. 
 | 
| HorizontalCS | 
 Represents the base class of the EPSG  
 horizontal coordinate systems. 
 | 
| ProjectedCS | 
 Represents the Projected  coordinate
 system. 
 | 
| Exception | Description | 
|---|---|
| InvalidCodeException | 
 Represents the Exception when an invalid coordinate
 system code is entered. 
 |