| Class | Description | 
|---|---|
| CoordinateSystem | 
 This class represents a coordinate system. 
 | 
| CoordinateSystemRegistry | 
 Implements a registry for  
CoordinateSystems. | 
| CoordinateSystemSupport | 
 Utility class. 
 | 
| Geographic | 
 This class is a base for geographic coordinate systems. 
 | 
| Planar | 
 A base class for planar coordinate systems. 
 | 
| Projection | 
 This is the abstract base class for all projections. 
 | 
| Radius | 
 Utility class, holds constants associated with Radius 
 for various projections. 
 | 
| Reprojector | 
 The source and destination coordinate reference systems must have
 the same datum (for example, WGS 84). 
 | 
| Spheroid | 
 GRS80 spheroid. 
 |