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<title>MAKECPT</title>
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<h1 align="center">MAKECPT</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#OPTIONS">OPTIONS</a><br>
<a href="#EXAMPLES">EXAMPLES</a><br>
<a href="#BUGS">BUGS</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<hr>
<h2>NAME
<a name="NAME"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">makecpt −
Make GMT color palette tables</p>
<h2>SYNOPSIS
<a name="SYNOPSIS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>makecpt</b>
[ <b>−C</b><i>table</i> ] [ <b>−D</b> ] [
<b>−I</b> ] [ <b>−M</b> ] [ <b>−N</b> ] [
<b>−Q</b>[<b>i|o</b>] ] [
<b>−T</b><i>z0/z1/dz</i> |
<b>−T</b><i>ztable</i> ] [ <b>−V</b> ] [
<b>−Z</b> ]</p>
<h2>DESCRIPTION
<a name="DESCRIPTION"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>makecpt</b>
is a utility that will help you make color palette tables
(cpt files). You define an equidistant set of contour
intervals or pass your own z-table, and create a new cpt
file based on an existing master cpt file. The resulting cpt
file can be reversed relative to the master cpt, and can be
made continuous or discrete. <br>
The color palette includes three additional colors beyond
the range of z-values. These are the background color (B)
assigned to values lower than the lowest <i>z</i>-value, the
foreground color (F) assigned to values higher than the
highest <i>z</i>-value, and the NaN color (N) painted
whereever values are undefined. <br>
If the master cpt file includes B, F, and N entries, these
will be copied into the new master file. If not, the
parameters <b><A HREF="gmtdefaults.html#COLOR_BACKGROUND">COLOR_BACKGROUND</A></b>, <b><A HREF="gmtdefaults.html#COLOR_FOREGROUND">COLOR_FOREGROUND</A></b>,
and <b><A HREF="gmtdefaults.html#COLOR_NAN">COLOR_NAN</A></b> from the .gmtdefaults4 file or the
command line will be used. This default behavior can be
overruled using the options <b>−D</b>, <b>−M</b>
or <b>−N</b>. <br>
The color model (RGB, HSV or CMYK) of the palette created by
<b>makecpt</b> will be the same as specified in the header
of the master cpt file. When there is no <b><A HREF="gmtdefaults.html#COLOR_MODEL">COLOR_MODEL</A></b>
entry in the master cpt file, the <b><A HREF="gmtdefaults.html#COLOR_MODEL">COLOR_MODEL</A></b>
specified in the .gmtdefaults4 file or on the command line
will be used.</p>
<h2>OPTIONS
<a name="OPTIONS"></a>
</h2>
<table width="100%" border="0" rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em"><b>−C</b></p></td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em">Selects the master color table
<i>table</i> to use in the interpolation. Choose among the
built-in tables (type <b>makecpt</b> to see the list) or
give the name of an existing cpt file [Default gives a
rainbow cpt file].</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−D</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Select the colors for lowest and highest <i>z</i>-values
in the output cpt file as the back- and foreground colors
that will be written to the cpt file [Default uses the
colors specified in the master file, or those defined by the
parameters <b><A HREF="gmtdefaults.html#COLOR_BACKGROUND">COLOR_BACKGROUND</A></b>, <b><A HREF="gmtdefaults.html#COLOR_FOREGROUND">COLOR_FOREGROUND</A></b>,
and <b><A HREF="gmtdefaults.html#COLOR_NAN">COLOR_NAN</A></b>].</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−I</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Reverses the sense of color progression in the master
cpt file. Also exchanges the foreground and background
colors, including those specified by the parameters
<b><A HREF="gmtdefaults.html#COLOR_BACKGROUND">COLOR_BACKGROUND</A></b> and <b><A HREF="gmtdefaults.html#COLOR_FOREGROUND">COLOR_FOREGROUND</A></b>.</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−M</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Overrule background, foreground, and NaN colors
specified in the master cpt file with the values of the
parameters <b><A HREF="gmtdefaults.html#COLOR_BACKGROUND">COLOR_BACKGROUND</A></b>, <b><A HREF="gmtdefaults.html#COLOR_FOREGROUND">COLOR_FOREGROUND</A></b>,
and <b><A HREF="gmtdefaults.html#COLOR_NAN">COLOR_NAN</A></b> specified in the .gmtdefaults4 file or
on the command line. When combined with <b>−D</b>,
only <b><A HREF="gmtdefaults.html#COLOR_NAN">COLOR_NAN</A></b> is considered.</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−N</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Do not write out the background, foreground, and
NaN-color fields [Default will write them].</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−Q</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Selects a logarithmic interpolation scheme [Default is
linear]. <b>−Qi</b> expects input z-values to be
log10(z), assigns colors, and writes out z [Default].
<b>−Qo</b> takes log10(z) first, assigns colors, and
writes out z.</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−T</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Defines the range of the new cpt file by giving the
lowest and highest z-value and the interval. Alternatively,
give the name of a ASCII file that has one z-value per
record. If not given, the existing range in the master cpt
file will be used intact.</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−V</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Selects verbose mode, which will send progress reports
to stderr [Default runs "silently"].</p></td></tr>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p><b>−Z</b></p></td>
<td width="8%"></td>
<td width="78%">
<p>Creates a continuous cpt file [Default is discontinuous,
i.e., constant colors for each interval].</p></td></tr>
</table>
<h2>EXAMPLES
<a name="EXAMPLES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">To make a cpt
file with z-values from -200 to 200, with discrete color
changes every 25, and using a polar blue-white-red
colortable:</p>
<p style="margin-left:11%; margin-top: 1em"><b>makecpt
−C</b><i>polar</i> <b>−T</b>-200/200/25 >
colors.cpt</p>
<p style="margin-left:11%; margin-top: 1em">To make an
equidistant cpt file from z = -2 to 6, in steps of 1, using
continuous default rainbow colors:</p>
<p style="margin-left:11%; margin-top: 1em"><b>makecpt
−T</b>-2/6/1 <b>−Z</b> > rainbow.cpt</p>
<p style="margin-left:11%; margin-top: 1em">To make a GEBCO
look-alike cpt file for bathymetry, run</p>
<p style="margin-left:11%; margin-top: 1em"><b>makecpt
−C</b> gebco > my_gebco.cpt</p>
<h2>BUGS
<a name="BUGS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">Since
<b>makecpt</b> will also interpolate from any existing .cpt
file you may have in your directory, you cannot use one of
the listed cpt names as an output filename; hence the
my_gebco.cpt in the example.</p>
<h2>SEE ALSO
<a name="SEE ALSO"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><i><A HREF="GMT.html">GMT</A></i>(1),
<i><A HREF="grd2cpt.html">grd2cpt</A></i>(1)</p>
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