NAME

     makecpt - Make GMT color palette tables

SYNOPSIS

     makecpt -Ccint_or_file -Snshades_or_file[c]
      [ -I ] [ -Mmidval [ -Z ]

DESCRIPTION

     makecpt is a utility that will help you make  color  palette
     tables  (cpt files).  Optionally, you may define equidistant
     contour intervals and create a grayramp or rainbow palette.

     -C    Name of a single-column contour  interval  file  OR  a
          positive number, the contour interval desired.

     -S    Name of a color table OR a positive number, the number
          of  intervals  desired.  Append a c to create a rainbow
          color table [Default is gray ramp].

OPTIONS

     -I    Reverses the sense of the gray or color ramp.

     -M    Sets the middle contour value.  Ignored if -C is given
          a file name.

     -Z    Creates a continuous cpt file [Default is  discontinu-
          ous,  i.e. constant colors for each interval].  Ignored
          if contour or color tables are specified.

EXAMPLES

     To convert the GMT v1.x style contours.d and colors.d tables
     into a cpt file, try

     makecpt -Ccontours.d -Scolors.d > colors.cpt

     To make an equidistant cpt file from z = -2 to 6,  in  steps
     of 1, using continuous rainbow colors, try

     makecpt -C1.0 -S8c -M2 -Z > rainbow.cpt

SEE ALSO

     gmt, grd2cpt

REFERENCES

     Wessel, P., and W. H. F. Smith, 1995,  The  Generic  Mapping
     Tools  (GMT)  version  3.0  Technical  Reference & Cookbook,
     SOEST/NOAA.
     Wessel, P., and W. H. F. Smith, 1995,  New  Version  of  the
     Generic Mapping Tools Released, EOS Trans. AGU, 76, p. 329.
     Wessel, P., and W. H. F. Smith, 1995,  New  Version  of  the
     Generic           Mapping           Tools          Released,
     http://www.agu.org/eos_elec/95154e.html, Copyright  1995  by
     the American Geophysical Union.
     Wessel, P., and W. H. F. Smith, 1991,  Free  Software  Helps
     Map and Display Data, EOS Trans. AGU, 72, p. 441.