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<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.-->
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<head>
<title>GrADS Command: set kml</title>
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<h2><b>set kml</b></h2>
<p>
<code>set kml <-<em>type</em>> <i>fnameroot</i></code>
<p>
Sets the filename root and output options for Keyhole Markup Language (KML) output. </p>
<p>Where <code><em>type</em></code> may be one of the following:</p>
<ul>
<code>img | image </code>(default) For writing out an image file and complementary KML file<br>
<code>ln | line </code>For writing out contour lines in a KML file<br>
<code>poly </code>For writing out polygons from the shaded contouring algorithm in KML format. <br>
</ul>
<p>When using the <code>-img</code> or <code>-image</code> option (the default), two output files will be created: </p>
<ul>
<p><code><i>fnameroot</i>.tif </code>A TIFF image file with a pixel for each gridbox in the domain (default is <code>grads.tif</code>)<br>
<code><i>fnameroot</i>.kml </code>A text file in the Keyhole Markup Language (KML) that contains <br>
<code> </code>the georeferencing information for the TIFF image (default is <code>grads.kml</code>)<br>
</ul>
Otherwise, only one file is written:</p>
<ul>
<code><i>fnameroot</i>.kml </code>A text file in the KML format that contains the color, thickness, and <br>
<code> </code>georeferencing information for the contour lines or polygons (default is <code>grads.kml</code>)
</ul>
<h3> </h3>
<h3>Usage Notes</h3>
<p>
This command is available in version 2.0.a5 or later.
The <code>-ln</code> option for writing out contours in KML format is available in version 2.0.a9 or later. The <code>-poly</code> option for writing out polygons in KML format is available in version 2.0.0 or later. In order to use the <code>-img</code> option, GrADS must be linked with the TIFF and GeoTIFF libraries. Check the output from 'q config' for the message "GeoTIFF and KML/TIFF output ENABLED". The <code>-ln</code> and <code>-poly</code> options do not depend on the TIFF library, and are always enabled.
<p>This command is used in conjunction with the <code><a href="gradcomdsetgxout.html">set gxout kml</a> </code> command which sets the graphics output type; the <code><a href="gradcomddisplay.html">display</a></code> command will then create the output file(s) instead of drawing a plot. The display expression must be a
2-dimensional grid that varies in X and Y (longitude and latitude), and the projection must be latlon.
<p>The files <code><i>fnameroot</i>.tif</code> and <code><i>fnameroot</i>.kml</code> will be replaced if they exist. If
<code> <i>fnameroot</i> </code>provided by the user ends in ".kml", GrADS will not append an additional ".kml", and will change the extension to ".tif" for the image file (if necessary).
<p>The output in KML format is intended for use with GIS tools such as <a href="http://earth.google.com/">Google Earth</a>. Please note that Google Earth prefers longitudes to range from -180 to 180 instead of 0 to 360.
<h3>Examples </h3>
<pre>clear
set gxout kml
set kml myimg
d var
clear
set gxout kml
set kml -ln mycntr
d var
</pre>
</p>
<p> </p>
<p> </p>
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