r.gradient - GRASS GIS manual

Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

NAME

r.gradient - Create a gradient map

KEYWORDS

raster, gradient

SYNOPSIS

r.gradient

r.gradient --help

r.gradient output=name direction=string range=integer[,integer,...] [percentile=float] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

output=name [required]: Name for output raster map
direction=string [required]: The direction of gradient; Options: N-S, S-N, W-E, E-W, NW-SE, NE-SW
range=integer[,integer,...] [required]: Minimum and maximum values of gradient
percentile=float: Percentile to calculate (only for oblique gradient); Options: 0-100

DESCRIPTION
EXAMPLES
AUTHOR

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

SOURCE CODE

Available at: r.gradient source code (history)

Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55