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.
-B 'order by' directive
Order by. The output will be ordered according to the 'order by' directive.
Example: "step:i asc, centre desc" (step numeric ascending and centre descending)
Default sort mode is 'asc'.
-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 a 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
grib_get fails if a key is not found:
> grib_get -p nosuchkey ../data/tigge_pf_ecmwf.grib2 ECCODES ERROR : Key/value not found
To get the step of the first GRIB message in a file:
> grib_get -w count=1 -p step ../data/tigge_pf_ecmwf.grib2