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:

       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)



GMT4.0                            1 Oct 2004                        GRDCLIP(l)