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DESCRIPTION

List content of grib files printing values of some keys. It does not fail when a key is not found.

USAGE

grib_ls [options] grib_file grib_file ...

OPTIONS


-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.


-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.


-j

json output


-B order by directive

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)


-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)


-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.


-i index

Data value corresponding to the given index is printed.


-n namespace

All the keys belonging to namespace are printed.


-m

Mars keys are printed.


-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 message.


-g

Copy GTS header.


-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".


-x

Fast parsing option, only headers are loaded.

grib_ls examples

  1. Without options a default list of keys is printed. The default list is different depending on the type of grib message.

     
    >  grib_ls ../data/reduced*.grib1 ../data/regular*.grib1 ../data/reduced*.grib2 
    


  2. To print offset and count number in file use the keys offset and count Also the total count in a set of files is available as countTotal

     
    >  grib_ls -p offset,count,countTotal ../data/reduced*.grib1
    


  3. To list only a subset of messages use the -w (where option). Only the pressure levels are listed with the following line.

     
    >  grib_ls -w levelType=pl ../tigge_pf_ecmwf.grib2 
    


  4. All the grib messages not on pressure levels are listed as follows:

     
    >  grib_ls -w levelType!=pl ../tigge_pf_ecmwf.grib2 
    


  5. To get the closest grid point to a latitude/longitude.

     
    > grib_ls -l 51.46,-1.33,1 -p paramId,name ../data/reduced_gaussian_surface.grib2
    ../data/reduced_gaussian_surface.grib2
    paramId     shortName    value 
    167         2t          282.002     
    1 of 1 messages in ../data/reduced_gaussian_surface.grib2
    
    1 of 1 total messages in 1 files
    Input Point: latitude=51.46  longitude=-1.33
    Grid Point chosen #3 index=749 latitude=51.63 longitude=0.00 distance=93.81 (Km)
    Other grid Points
    <ul><li>1 - index=845 latitude=48.84 longitude=0.00 distance=306.86 (Km)
    </li><li>2 - index=944 latitude=48.84 longitude=356.40 distance=333.66 (Km)
    </li><li>3 - index=749 latitude=51.63 longitude=0.00 distance=93.81 (Km)
    </li><li>4 - index=844 latitude=51.63 longitude=356.25 distance=168.37 (Km)
    


  6. To get a list ordered by the 'level' key (ascending order).

     
    >  grib_ls -B 'level:i asc' tigge_af_ecmwf.grib2
    
    Note: 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!


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