NAME

       grdcut - Extract a subregion out of a .grd file


SYNOPSIS

       grdcut input_file.grd -Goutput_file.grd -Rwest/east/south/north[r] [ -V
       ]


DESCRIPTION

       grdcut will produce a new output_file.grd file which is a subregion  of
       input_file.grd.       The      subregion      is     specified     with
       -Rwest/east/south/north as in other programs; the specified range  must
       not  exceed  the  range  of input_file.grd. If in doubt, run grdinfo to
       check range. Complementary to grdcut there is grdpaste, which will join
       together two grdfiles along a common edge.

       input_file.grd
              this is the input .grd format file.

       -Goutput_file.grd
              this is the output .grd format file.

       -R     west,  east, south, and north specify the Region of interest. To
              specify boundaries in degrees and minutes [and seconds], use the
              dd:mm[:ss]  format.  Append  r if lower left and upper right map
              coordinates are given instead of wesn.  This defines the  subre-
              gion to be cut out.


OPTIONS

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


EXAMPLES

       Suppose you have used surface  to  grid  ship  gravity  in  the  region
       between  148E  -  162E  and 8N - 32N, and you do not trust the gridding
       near the edges, so you want to keep only the area between 150E  -  160E
       and 10N - 30N, then:

       grdcut  grav_148_162_8_32.grd  -Ggrav_150_160_10_30.grd -R150/160/10/30
       -V


SEE ALSO

       grdpaste(l), grdinfo(l), gmt(l)



GMT3.4.6                          1 Jan 2005                         GRDCUT(l)

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