wgrib2: -ijbox
Introduction
The -ijbox option takes a rectangular box
of data from a rectanular grid an writes it out in either
text, bin, or spread (sheet) format. The extracted box can
have every point or every n-th point.
Usage
-ijbox i1:i2:di j1:j2:dj output_file format
format = bin, text or spread (format of output_file)
The data in output_file is written out as
do iy=j1, j2, dj
do ix=i1, i2, di
data(ix,iy)
enddo
enddo
Note: -big_endian and -little_endian have no effect the bin type output
Example
Wgrib2 when writing binary, can make a fortran header at the
beginning of the grid and a fortran trailer at the end of
the grid. I wanted to create a file with fortran header
and trailer surrounding each row of the grid. I was
able to do it with -ijox. The grid of rtgssthr_grb2
is 1041 x 441.
rm output
i=1
while [ $i -le 441 ] ; do
wgrib2 rtgssthr_grb2 -append -header ijbox 1:1041 $i:$i output bin
i=`expr $i + 1`
done
See also:
-undefine,
-small_grib,
-text_col,
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