DESCRIPTION

r.gradient create a gradient map. It is able to create horizontal, vertical and oblique gradient.

EXAMPLES

To calculate vertical gradient from North to South
  r.gradient output=gradient_ns range=0,50 direction=N-S
  
To calculate horizontal gradient from East to West
  r.gradient output=gradient_ea range=10,20 direction=E-W
  
To calculate oblique gradient from North-East to South-West you have to set also the percentile option to set the slope of the gradient.
  r.gradient output=gradient_oblique range=10,20 direction=NE-SW
  

AUTHOR

Luca Delucchi, Fondazione E. Mach (Italy)

Thanks to Johannes Radinger for the code of horizontal and vertical gradient

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