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.texture.tiled - Runs r.texture in parallel over tiles
KEYWORDS
raster,
texture,
tiling
SYNOPSIS
r.texture.tiled
r.texture.tiled --help
r.texture.tiled input=name output=basename method=string size=integer distance=integer tile_width=integer tile_height=integer processes=integer [mapset_prefix=string] [--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 raster map
- output=basename [required]
- Name for output basename raster map(s)
- method=string [required]
- Texture method to apply
- Options: asm, contrast, corr, var, idm, sa, sv, se, entr, dv, de, moc1, moc2
- size=integer [required]
- The size of moving window (odd and >= 3)
- Default: 3
- distance=integer [required]
- The distance between two samples (>= 1)
- The distance must be smaller than the size of the moving window
- Default: 1
- tile_width=integer [required]
- Width of tiles
- Default: 1000
- tile_height=integer [required]
- Height of tiles
- Default: 1000
- processes=integer [required]
- Number of parallel processes
- Default: 1
- mapset_prefix=string
- Mapset prefix
r.texture.tiled cuts a raster input map into tiles and runs
r.texture over these tiles before patching the
result together into a single output raster map.
The overlap between tiles is calculated internally in order to correspond to
the window size in order to avoid any border effects.
Tiles can be defined with the tile_width, tile_height and
overlap parameters. If processes is higher than one, these tiles
will be processed in parallel.
The mapset_prefix parameter allows to make sure that the temporary
mapsets created during the tiled processing have unique names. This is useful
if the user runs r.texture.tiled several times in parallel (e.g. in
an HPC environment).
The parameters for texture calculation are identical to those of
r.texture. Currently, this module only allows
calculating one texture feature at a time. The
n flag allowing null
cells is automatically set in order to avoid issues at the border of the
current computational region / of the input map.
Run r.texture over tiles with size 1000x1000 using 4 parallel processes:
g.region rast=ortho_2001_t792_1m
r.texture.tiled ortho_2001_t792_1m output=ortho_texture method=idm \
tile_width=1000 tile_height=1000 processes=4
r.texture
Moritz Lennert
SOURCE CODE
Available at:
r.texture.tiled source code
(history)
Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55
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.
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GRASS Development Team,
GRASS GIS 7.8.8dev Reference Manual