Geografic-Information-System/raster/r.tile/r.tile.html

<h2>DESCRIPTION</h2>

<em>r.tile</em> retiles an existing raster map with user defined 
x and y tile size.

<h2>NOTES</h2>

<em>r.tile</em> generates a separate raster for each tile.
This is equivalent to running <em>g.region</em> along with
<em>r.resample</em> in a double loop.
<p>
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.
<p>
The overlap is defined in rows/columns.

<h2>EXAMPLE</h2>

Retiling example for the North Carolina DEM:

<div class="code"><pre>
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
</pre></div>

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

<h2>SEE ALSO</h2>

<em>
<a href="g.region.html">g.region</a>,
<a href="r3.retile.html">r3.retile</a>
</em>

<h2>AUTHOR</h2>

Glynn Clements

<p><i>Last changed: $Date$</i>