r3.gradient(1grass) GRASS GIS User's Manual r3.gradient(1grass)
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=name [required]
Name of input 3D raster map
output=grad_x,grad_y,grad_z[,grad_x,grad_y,grad_z,...] [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)
Accessed: unknown
Main index | 3D raster index | Topics index | Keywords index | Graphi-
cal index | Full index
© 2003-2022 GRASS Development Team, GRASS GIS 7.8.7 Reference Manual
GRASS 7.8.7 r3.gradient(1grass)
Generated by dwww version 1.14 on Fri Dec 27 18:18:04 CET 2024.