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r3.gradient(1)		    GRASS GIS User's Manual		r3.gradient(1)

NAME
       r3.gradient   - Computes	gradient of a 3D raster	map and	outputs	gradi-
       ent components as three 3D raster maps.

KEYWORDS
       raster3d, gradient, voxel

SYNOPSIS
       r3.gradient
       r3.gradient --help
       r3.gradient			 input=name			  out-
       put=grad_x,grad_y,grad_z[,grad_x,grad_y,grad_z,...]	       [block-
       size=size_x,size_y,size_z[,size_x,size_y,size_z,...]]	 [--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:
       input=nameA [required]
	   Name	of input 3D raster map

       output=grad_x,grad_y,grad_z[,grad_x,grad_y,grad_z,...]A [required]
	   Name	for output 3D raster map(s)

       blocksize=size_x,size_y,size_z[,size_x,size_y,size_z,...]
	   Size	of blocks
	   Default: 30,30,20

DESCRIPTION
       Module r3.gradient computes gradient from a 3D raster map.  Results are
       three 3D	raster maps describing the x, y, z components of the  computed
       gradient	field.

EXAMPLES
       # create	a 3D raster
       g.region	s=0 n=100 w=0 e=100 b=0	t=100 -p
       r3.mapcalc "test_gradient = sqrt(row()*row() +col()*col()+ depth()*depth())"
       # compute gradient
       r3.gradient input=test_gradient output=grad_x,grad_y,grad_z

SEE ALSO
	r3.flow, r.flow

AUTHORS
       Anna Petrasova, NCSU OSGeoREL, developed	during GSoC 2014.

SOURCE CODE
       Available at: r3.gradient source	code (history)

       Main  index | 3D	raster index | Topics index | Keywords index | Graphi-
       cal index | Full	index

       A(C) 2003-2020 GRASS Development	Team, GRASS GIS	7.8.4 Reference	Manual

GRASS 7.8.4							r3.gradient(1)

NAME | KEYWORDS | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHORS | SOURCE CODE

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