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DESCRIPTION

Get values of some keys from a grib file. It is similar to grib_ls, but fails returning an error code when an error occurs (e.g. key not found).

USAGE

grib_get [options] grib_file grib_file ...

OPTIONS


-f

Force. Force the execution not to fail on error.


-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.


-F format

C style format for floating point values.


-l Latitude,Longitude[,MODE,file]

Value close to the point of a Latitude/Longitude. Allowed values for MODE are: 4 (4 values in the nearest points are printed) Default 1 (the value at the nearest point is printed) file (file is used as mask. The closer point with mask value>=0.5 is printed)


-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. Messages are processed only if they match all the key/value constraints. 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 specified. 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.


-n namespace

All the keys belonging to namespace are printed.


-s key[:{s|d|i}]=value,key[:{s|d|i}]=value,...

Key/values to set. For each key a string (key:s), a double (key:d) or an integer (key:i) type can be defined. By default the native type is set.


-V

Version.


-W width

Minimum width of each column in output. Default is 10.


-m

Mars keys are printed.


-M

Multi-field support off. Turn off support for multiple fields in single grib message.


-g

Copy GTS header.


-G

GRIBEX compatibility mode.


-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.


-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".


-i index

Data value corresponding to the given index is printed.

grib_get examples

  1. grib_get fails if a key is not found.

     
    > grib_get -p gribname ../data/tigge_pf_ecmwf.grib2
    


  2. To get the step of the first GRIB message in a file:

     
    > grib_get -w count=1 -p step ../data/tigge_pf_ecmwf.grib2
    


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