grd2xyz - Converting a grdfile to an ASCII or binary table grd2xyz grdfile [ -H [ nrec ] ] [ -R west / east / south / north [ r ] [ -S ] [ -Z [ flags ] ] [ -bo [ s ] ] grd2xyz reads a binary 2-D grdfile and writes out xyz-triplets in ASCII [or binary] format to standard output. Modify the precision of the ASCII output format by editing the D_FORMAT parameter in your .gmtdefaults file, or choose binary output using single or double precision storage. ... Ignored if binary output is selected. ...