NAME

      grdclip - Clipping of range in grdfiles.

SYNOPSIS

      grdclip input_file.grd -Goutput_file.grd [ -Sahigh/above ] [
      -Sblow/below ] [ -V ]

DESCRIPTION

      grdclip will set values < low to below and/or values > high to above.
      Useful when you want all of a continent or an ocean to fall into one
      color or grayshade in image processing, or clipping of the range of
      data values is required.  above/below can be any number or NaN (Not a
      Number).  You must choose at least one of -Sa or -Sb.

      input_file.grd
           The input 2-D binary grdfile.

      -G   output_file.grd is the modified output grdfile.

OPTIONS

      -Sa  Set all data[i] > high to above.

      -Sb  Set all data[i] < low to below.

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

EXAMPLES

      To set all values > 70 to NaN and all values < 0 to 0 in file
      data.grd, try:

      grdclip data.grd -Gnew_data.grd -Sa70/NaN -Sb0/0 -V

SEE ALSO

      gmt, grdlandmask, grdmask, grdmath, grd2xyz, xyz2grd