large grib files

[Hai-Ru Chang]

Hello,
              When I use grads to plot a field in a large grib file
(~3.1GB), to the end of 1/3 of the file the output are always wrong.
I doubt is is owing to the command gribmap  can't handle such a big
file.  The following is the part of output from the gribmap command:

!!!!! MATCH:  16462  2147303268  255  1     0  135  100 175
2147172943          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00
!!!!! MATCH:  16463  2147433708  255  1     0  131  100 175
2147303383          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00
!!!!! MATCH:  16464  2147564148  255  1     0  132  100 175
2147433823          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00
!!!!! MATCH:  16465  2147694588  255  1     0  129  100 150
-2147403033          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00
!!!!! MATCH:  16466  2147825028  255  1     0  130  100 150
-2147272593          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00
!!!!! MATCH:  16467  2147955468  255  1     0  133  100 150
-2147142153          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00
!!!!! MATCH:  16468  2148085908  255  1     0  135  100 150
-2147011713          0  16 btim: 1992012206:00 tau:      0 dtim:
1992012206:00

As you can see there are negative numbers after 150 in several lines.





Dr. Hai-Ru Chang
School of Earth and Atmospheric Sciences
Georgia Institute of Technology
Atlanta, GA 30332-0340


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