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<HTML>
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<TITLE>makecpt</TITLE>
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<H1>makecpt</H1>
<HR>
<PRE>
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makecpt - Make GMT color palette tables
</PRE>
<H2>SYNOPSIS</H2><PRE>
<B>makecpt</B> [ <B>-C</B><I>table</I> ] [ <B>-I</B> ] [ <B>-T</B><I>z0/z1/dz</I> | <B>-T</B><I>ztable</I>] [ <B>-V</B> ]
[ <B>-Z</B> ]
</PRE>
<H2>DESCRIPTION</H2><PRE>
<B>makecpt</B> is a utility that will help you make color palette
tables (cpt files). You define an equidistant set of con
tour intervals or pass your own z-table, and create a new
cpt file based on an existing master cpt file. The result
ing cpt file can be reversed relative to the master cpt,
and can be made continuous or discrete.
</PRE>
<H2>OPTIONS</H2><PRE>
<B>-C</B> 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 cptfile [Default gives a rainbow cpt
file].
<B>-I</B> Reverses the sense of color progression in the mas
ter cptfile.
<B>-T</B> Defines the range of the new cptfile by giving the
lowest and highest z-value and the interval. Alter
natively, give the name of a ASCII file that has
one z-value per record. If not given, the existing
range in the master cptfile will be used intact.
<B>-V</B> Selects verbose mode, which will send progress
reports to stderr [Default runs "silently"].
<B>-Z</B> Creates a continuous cpt file [Default is discon
tinuous, i.e. constant colors for each interval].
</PRE>
<H2>EXAMPLES</H2><PRE>
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, try
makecpt <B>-C</B><I>polar</I> <B>-T</B>-200/200/25 > colors.cpt
To make an equidistant cpt file from z = -2 to 6, in steps
of 1, using continuous default rainbow colors, try
makecpt <B>-T</B>-2/6/1 <B>-Z</B> > rainbow.cpt
To make a GEBCO look-alike cpt file for bathymetry, try
makecpt <B>-C</B>gebco > my_gebco.cpt
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.
</PRE>
<H2>SEE ALSO</H2><PRE>
<I>gmt</I>(l), <I><A HREF="grd2cpt.html">grd2cpt</A></I>(l)
</PRE>
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