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       makecpt - Make GMT color palette tables


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


       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.


       -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

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


       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


       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.


       gmt(1gmt), grd2cpt(1gmt)

                                            1 Jan 2004                                 MAKECPT(l)