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/*! \page grib_copy grib_copy
\section DESCRIPTION
Copies the content of grib files printing values of some keys.
\section USAGE
grib_copy
[options] grib_file grib_file ... output_grib_file
\section OPTIONS
-f \n Force. Force the execution not to fail on error.
\n \n -r \n Repack data. Sometimes after setting some keys involving properties
of the packing algorithm a repacking of data is needed.
This repacking is performed setting this -r option.
\n \n -p key[:{s/d/i}],key[:{s/d/i}],... \n
Declaration of keys to print.
For each key a string (key:s), a double (key:d) or an integer (key:i)
type can be requested. Default type is string.
\n \n -P key[:{s/d/i}],key[:{s/d/i}],... \n
As -p adding the declared keys to the default list.
\n \n -w key[:{s/d/i}]{=/!=}value,key[:{s/d/i}]=value,... \n
Where clause.
Only grib messages matching the key/value constraints are copied to the
output_grib_file.
A valid constraint is of type key=value or key!=value.
For each key a string (key:s), a double (key:d) or an integer (key:i)
type can be defined. Default type is string.
\n \n -B order by directive \n
Order by. The output will be ordered according to the order by directive.
Order by example: "step:i asc, centre desc" (step numeric ascending and centre descending)
\n \n -V \n Version.
\n \n -W width \n
Minimum width of each column in output. Default is 10.
\n \n -M \n Multi-field support off. Turn off support for multiple fields in single grib message.
\n \n -T T | B | M | A \n Message type. T->GTS, B->BUFR, M->METAR (Experimental),A->Any (Experimental).
The input file is interpreted according to the message type.
\n \n -g \n Copy GTS header.
\n \n -G \n GRIBEX compatibility mode.
\n \n -7 \n Does not fail when the message has wrong length
\n \n -v \n Verbose.
\n \n
\section grib_copy_examples grib_copy examples
-# To copy only the pressure levels from a file\n
\verbatim
> grib_copy -w levtype=pl ../data/tigge_pf_ecmwf.grib2 out.grib
\endverbatim\n
-# To copy only the fields that are not on pressure levels from a file\n
\verbatim
> grib_copy -w levtype!=pl ../data/tigge_pf_ecmwf.grib2 out.grib
\endverbatim\n
-# To copy only the first three fields from a file\n
\verbatim
> grib_copy -w count=1/2/3 ../data/tigge_pf_ecmwf.grib2 out.grib
\endverbatim\n
-# A grib_file with multi field messages can be converted in single field messages
with a simple grib_copy.\n
\verbatim
> grib_copy multi.grib simple.grib
\endverbatim\n
-# Use the square brackets to insert the value of a key
in the name of the output file.\n
\verbatim
> grib_copy in.grib 'out_[shortName].grib'
\endverbatim\n
*/
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