DESCRIPTION
Copies the content of grib GRIB files printing values of some keys. If the name of the output_grib_file contains a key enclosed in square brackets, its value will be used.
USAGE
grib_copy [options] grib_file grib_file ... output_grib_file
OPTIONS
-f
Force. Force the execution not to fail on error.
-r
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.
-p key[:{s
...
|d
...
|i}],key[:{s
...
|d
...
|i}],...
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.
-P key[:{s
...
|d
...
|i}],key[:{s
...
|d
...
|i}],...
As -p adding the declared keys to the default list.
-w key[:{s
...
|d
...
|i}]{=
...
|!=}value,key[:{s
...
|d
...
|i}]=value,...
Where clause. Only grib 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. In the value you can also use the forward-slash character '/' to specify an OR condition (i.e. a logical disjunction)
Note: only one -w clause is allowed.
-B order by directive
Order by. The output will be ordered according to the order by directive. Order by example
Example: "step:i asc, centre desc" (step numeric ascending and centre descending)
Default sort mode is 'asc'
-V
Version.
-W width
Minimum width of each column in output. Default is 10.
-M
Multi-field support off. Turn off support for multiple fields in single grib GRIB message.
-T T | B | M | A
Message type. T->GTS, B->BUFR, M->METAR (Experimental),A->Any (Experimental). The input file is interpreted according to the message type.
-g
Copy GTS header.
-G
GRIBEX compatibility mode.
-7
Does not fail when the message has wrong length
-X offset
Input file offset in bytes. Processing of the input file will start from "offset".
-v
Verbose.
grib_copy examples
To copy only the pressure levels from a file
Code Block > grib_copy -w levtype=pl ../data/tigge_pf_ecmwf.grib2 out.gribTo copy only the fields that are not on pressure levels from a file
Code Block > grib_copy -w levtype!=pl ../data/tigge_pf_ecmwf.grib2 out.gribTo copy only the first three fields from a file
Code Block > grib_copy -w count=1/2/3 ../data/tigge_pf_ecmwf.grib2 out.gribA grib_file with multi field messages can be converted in single field messages with a simple grib_copy.
Code Block > grib_copy multi.grib simple.gribUse the square brackets to insert the value of a key in the name of the output file (This is a good way to split a large GRIB file)
Code Block > grib_copy in.grib 'out_[shortName].grib'Note: we need to quote the name of the output so the shell does not interpret the square brackets
To copy fields whose typeOfLevel is either 'surface' or 'meanSea'
Code Block > grib_copy -w typeOfLevel=surface/meanSea orig.grib out.gribNote: we need to quote the name of the output so the shell does not interpret the square brackets To copy selected fields and apply sorting (sorted by level in ascending order)
Code Block > grib_copy -w typeOfLevel=heightAboveGround -B'level:i asc' tigge_af_ecmwf.grib2 out.gribNote: we need to specify the ':i' to get a numerical sort. By default values are sorted as strings so a level of 100 would come before 20!