-grid_changes¶

Introduction¶

The -grid_changes option is a safety option. Normally we don't expect the grid to change within a grib file, and many programs would fail if the grid did change. Wgrib2 will work if the grid changes but it would work much slower. (Each grid change would require a recalculation of the grid parameters such as the the grid point locations if needed.) The -grid_changes option prints to stderr, the number of times the grid changed during processing of the file. Only grib (sub-)messages that were processed and not skipped by a -match or similar option will count.

Usage¶

-grid_changes

Example¶

$ wgrib2 fcst.grb2 -bin fcst.bin -grid\_changes -count
-sh-3.00$ wgrib2 fcst.grb2 -bin fcst.bin -grid_changes
1:4:d=2007032600:HGT:1000 mb:anl:
2:422561:d=2007032600:HGT:1000 mb:3 hour fcst:
Good: only one grid
number of records: 2

In the above example, we converted the file to binary. It consisted of a single grid and two records.