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)