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 subregion 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(1gmt),
grdinfo(1gmt),
gmt(1gmt)