.TH r.tile 1grass "" "GRASS 7.8.5" "GRASS GIS User's Manual"
.SH NAME
\fI\fBr.tile\fR\fR  \- Splits a raster map into tiles.
.SH KEYWORDS
raster, tiling
.SH SYNOPSIS
\fBr.tile\fR
.br
\fBr.tile \-\-help\fR
.br
\fBr.tile\fR \fBinput\fR=\fIname\fR \fBoutput\fR=\fIstring\fR \fBwidth\fR=\fIinteger\fR \fBheight\fR=\fIinteger\fR  [\fBoverlap\fR=\fIinteger\fR]   [\-\-\fBhelp\fR]  [\-\-\fBverbose\fR]  [\-\-\fBquiet\fR]  [\-\-\fBui\fR]
.SS Flags:
.IP "\fB\-\-help\fR" 4m
.br
Print usage summary
.IP "\fB\-\-verbose\fR" 4m
.br
Verbose module output
.IP "\fB\-\-quiet\fR" 4m
.br
Quiet module output
.IP "\fB\-\-ui\fR" 4m
.br
Force launching GUI dialog
.SS Parameters:
.IP "\fBinput\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name of input raster map
.IP "\fBoutput\fR=\fIstring\fR \fB[required]\fR" 4m
.br
Output base name
.IP "\fBwidth\fR=\fIinteger\fR \fB[required]\fR" 4m
.br
Width of tiles (columns)
.IP "\fBheight\fR=\fIinteger\fR \fB[required]\fR" 4m
.br
Height of tiles (rows)
.IP "\fBoverlap\fR=\fIinteger\fR" 4m
.br
Overlap of tiles
.SH DESCRIPTION
\fIr.tile\fR retiles an existing raster map with user defined
x and y tile size.
.SH NOTES
\fIr.tile\fR generates a separate raster for each tile.
This is equivalent to running \fIg.region\fR along with
\fIr.resample\fR in a double loop.
.PP
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.
.PP
The overlap is defined in rows/columns.
.SH EXAMPLE
Retiling example for the North Carolina DEM:
.br
.nf
\fC
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
\fR
.fi
creates 4 tiles with the prefix \fIelev_tile\fR (named:
elev_tile\-000\-000, elev_tile\-000\-001, elev_tile\-001\-000, ...).
.SH SEE ALSO
\fI
g.region,
r3.retile
\fR
.SH AUTHOR
Glynn Clements
.SH SOURCE CODE
.PP
Available at: r.tile source code (history)
.PP
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.PP
© 2003\-2020
GRASS Development Team,
GRASS GIS 7.8.5 Reference Manual