Introduction

wgrib2 will decode the grib file when necessary and save the decoded grid point values in a floating point array (DATA). The -import options read grid point values from a specified file and replace the values of DATA. You would use the -import options to fix old grib files or make new ones.

Note that the import functions will reset the precision of the grib writing (new files) to 12 bits. Any -set_metadata should be done after the -import functions.

Usage

-import_bin data.txt              .. a binary (native format floating point) file
-import_ieee data.ieee            .. a big-endian 32-bit ieee file
-import_text data.txt		  .. a text file
                                     note that the -header and -no_header affect the data file format

Example

wgrib2 IN.grb -bin dump.bin              .. make a binary sequential file of the fields
Fix.sh dump.bin dump.bin.new             .. alter dump.bin
wgrib2 IN.grb -set_grib_type same -import_bin dump.bin.new -grib_out IN.new.grb

See also: -set_grib_type, -undefine, -grib_out,