Introduction

The -GRIB option is used to copy an entire GRIB2 message (including all the submessages) to a specified file. This is useful if you want to preserve to keep the submessages. This is in contrast to the -grib option which writes submessages into its own grib message.

The -GRIB option should only be used to copy the original grib message to another file. Unlike the the -grib option, changing the metadata is not recommended.

Usage

-GRIB file_name

Example

The grib standard allows arbitrary data between grib messages. Sometimes one want to remove this "junk" and only keep the grib messages. For grib files with no submessages, the cleaning operation is simple.

$ wgrib2 IN.grb -grib OUT.grb

$ wgrib2 IN.grb -if "^[0-9]*(\.1:|:)" -GRIB OUT.grb                all versions of wgrib2
$ wgrib2 IN.grb -if "^[0-9]*(\.1:|:)" -GRIB OUT.grb -endif         wgrib2 v3.0.0+

-if "^[0-9]*(\.1:|:)"  matches message number XXX or XXX.1, single grib message or first grib submessage
-GRIB                  write grib message including any submessage