NAME

       makecpt - Make GMT color palette tables

SYNOPSIS

       makecpt [ -Ctable ] [ -I ] [ -Tz0/z1/dz | -Tztable] [ -V ] [ -Z ]

DESCRIPTION

       makecpt  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.

OPTIONS

       -C     Selects the master color table table to use in  the  interpolation.   Choose  among  the  built-in
              tables  (type  makecpt  to  see the list) or give the name of an existing cptfile [Default gives a
              rainbow cpt file].

       -I     Reverses the sense of color progression in the master cptfile.

       -T     Defines the range of the new cptfile 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 cptfile will be used intact.

       -V     Selects verbose mode, which will send progress reports to stderr [Default runs "silently"].

       -Z     Creates a continuous cpt file [Default is discontinuous, i.e. constant colors for each interval].

EXAMPLES

       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 -Cpolar -T-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 -T-2/6/1 -Z > rainbow.cpt

       To make a GEBCO look-alike cpt file for bathymetry, try

       makecpt -Cgebco > my_gebco.cpt

BUGS

       Since  makecpt  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.

SEE ALSO

       gmt(1gmt), grd2cpt(1gmt)

                                                   1 Jan 2004                                         MAKECPT(l)