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A command line utility that decodes GRIB2 files as JSON.
This utility uses the netCDF-Java GRIB decoder, part of the THREDDS project
by University Corporation for Atmospheric Research/Unidata.
Installation
git clone <this project>
mvn package
This creates a .tar.gz in the target directory. Unzip and untar the package in a location of choice.
Usage
The grib2json launch script is located in the bin directory and requires the JAVA_HOME environment
variable to be defined.
> grib2json --help
Usage: grib2json [options] FILE
[--compact -c] : enable compact Json formatting
[--data -d] : print GRIB record data
[--filter.category --fc value] : select records with this numeric category
[--filter.parameter --fp value] : select records with this numeric parameter
[--filter.surface --fs value] : select records with this numeric surface type
[--filter.value --fv value] : select records with this numeric surface value
[--help -h] : display this help
[--names -n] : print names of numeric codes
[--output -o value] : write output to the specified file (default is stdout)
[--verbose -v] : enable logging to stdout
For example, the following command outputs to stdout the records for parameter 2 (U-component_of_wind), with
surface type 103 (Specified height level above ground), and surface value 10.0 meters from the GRIB2 file
gfs.t18z.pgrbf00.2p5deg.grib2. Notice the optional inclusion of human-readable xyzName keys and the data array:
