Dear gembud,
I recently tried to add a grid to an existing GEMPAK file using gdedit, but I
receive the following error:
blinky:/projects/proto/WRF/EMS/wrf/runs/CONUS/wrfpost/gempak > gdedit
GDEFIL Grid edit file gdedit_cbas.fil
GDFILE Grid file 200608172100_nmm_pres12km.grd
GPACK Packing type/number of bits
Parameters requested: GDEFIL,GDFILE,GPACK.
GEMPAK-GDEDIT>r
[GDEDIT -6] Error reading grid data.
Parameters requested: GDEFIL,GDFILE,GPACK.
GEMPAK-GDEDIT>e
A little background:
Using the existing GEMPAK file listed above, I ran gdlist to create an output
of an entire grid (601x371).
This grid contains negative values that I want to set to missing (-9999.00), so I substituted the negative values using shell commands, preserving the row and column orientation, and wrote the data to a file called "gdedit_cbas.fil". When I tried to add the new grid to the same GEMPAK grid file, I got the error above.
I have ensured that the file has the same # of entries and rows as the actual grid file.
FYI, the header of "gdedit_cbas.fil" is as follows:
Grid file: 200608172100_nmm_pres12km.grd
GRID IDENTIFIER:
TIME1 TIME2 LEVL1 LEVL2 VCORD PARM
060817/2100F012 0 NONE CBAS
AREA: DSET GRID SIZE: 601 371
COLUMNS: 1 601 ROWS: 1 371
Scale factor: 10** 0
COLUMN: 1 2 3 4 5 6 7 8
(etc, etc, etc)
Your feedback & assistance is greatly appreciated!
Regards,
Jonathan Case
