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  process-
     ing,  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(l), grdlandmask(l), grdmask(l), grdmath(l),  grd2xyz(l),
     xyz2grd(l)