r.tile(1grass)

NAME

r.tile - Splits a raster map into tiles.

KEYWORDS

raster, tiling

SYNOPSIS

r.tile
r.tile --help
r.tile input=name output=string width=integer height=integer [overlap=integer] [--help] [--verbose] [--quiet] [--ui]

Flags:

--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=string [required]: Output base name

width=integer [required]: Width of tiles (columns)

height=integer [required]: Height of tiles (rows)

overlap=integer: Overlap of tiles

DESCRIPTION

r.tile retiles an existing raster map with user defined x and y tile size.

NOTES

r.tile generates a separate raster for each tile. This is equivalent to running g.region along with r.resample in a double loop.

The module can be used to split a large raster map into smaller tiles, e.g. for further parallelized analysis on a cluster computing system.

The overlap is defined in rows/columns.

EXAMPLE

Retiling example for the North Carolina DEM:

g.region raster=elevation -p
# rows:       1350
# cols:       1500
# generating 2 x 2 = 4 tiles (width=1500/2, height=rows/2)
r.tile input=elevation output=elev_tile width=750 height=675

creates 4 tiles with the prefix elev_tile (named: elev_tile-000-000, elev_tile-000-001, elev_tile-001-000, ...).

AUTHOR

Glynn Clements

SOURCE CODE

Available at: r.tile source code (history)

Accessed: Monday Feb 24 17:50:55 2025