1r3.gradient(1)                Grass User's Manual               r3.gradient(1)
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NAME

6       r3.gradient   - Computes gradient of a 3D raster map and outputs gradi‐
7       ent components as three 3D raster maps.
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KEYWORDS

10       raster3d, gradient, voxel
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SYNOPSIS

13       r3.gradient
14       r3.gradient --help
15       r3.gradient                       input=name                       out‐
16       put=grad_x,grad_y,grad_z[,grad_x,grad_y,grad_z,...]             [block‐
17       size=size_x,size_y,size_z[,size_x,size_y,size_z,...]]     [--overwrite]
18       [--help]  [--verbose]  [--quiet]  [--ui]
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20   Flags:
21       --overwrite
22           Allow output files to overwrite existing files
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24       --help
25           Print usage summary
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27       --verbose
28           Verbose module output
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30       --quiet
31           Quiet module output
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33       --ui
34           Force launching GUI dialog
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36   Parameters:
37       input=name [required]
38           Name of input 3D raster map
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40       output=grad_x,grad_y,grad_z[,grad_x,grad_y,grad_z,...] [required]
41           Name for output 3D raster map(s)
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43       blocksize=size_x,size_y,size_z[,size_x,size_y,size_z,...]
44           Size of blocks
45           Default: 30,30,20
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DESCRIPTION

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

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

60        r3.flow, r.flow
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AUTHORS

63       Anna Petrasova, NCSU OSGeoREL, developed during GSoC 2014.
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65       Last changed: $Date: 2014-11-27 00:20:52 +0100 (Thu, 27 Nov 2014) $
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SOURCE CODE

68       Available at: r3.gradient source code (history)
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70       Main  index | 3D raster index | Topics index | Keywords index | Graphi‐
71       cal index | Full index
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73       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual
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77GRASS 7.6.0                                                     r3.gradient(1)
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