| Class | Description | 
|---|---|
| GridCell | |
| GridExtent | 
 This class defines a grid system (coordinates and cellsize) 
 | 
| GridWrapper | 
 Abstract class for grip wrappers. 
 | 
| GridWrapperInterpolated | 
 A grid wrapper that performs interpolation to calculate
 cell values. 
 | 
| GridWrapperNotInterpolated | 
 A grid wrapper that does not perform interpolation to
 calculate cell values. 
 |