1GRIBTOCDL(1) General Commands Manual GRIBTOCDL(1)
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6 gribtocdl - create netCDF CDL-file from GRIB dataset
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9 gribtocdl [-v] [-g tabfile] [-q qspecs] gribfiles
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12 This program decodes GRIB products and generates to stdout the corre‐
13 sponding CDL code that can be used in gribtonc(1) to convert the GRIB
14 products to netCDF format. The default parameter translation is made
15 according to a definition by UCAR, but the user may supply specific
16 translations in a separate file by the -g tabfile option. The user-sup‐
17 plied translations will override the default ones.
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20 -v Verbose, reports decoding steps to stderr.
21 -g tabfile
23 Use GRIB-netcdf translation defined in this file. The format of
24 this file is described below.
25 -q qspecs
27 Specification for how to expand so-called quasi-regular or
28 thinned grids into rectangular grids. This argument is a comma-
29 delimited text string that specifies the method of interpolation
30 used (currently lin for linear or cub for cubic), and the lati‐
31 tude and longitude increments in degrees for the resulting grid
32 (e.g. dlat=2.5,dlon=5.0).
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36 The format of the translation table is as follows: Each line contains
37 GRIB parameter number
38 netCDF parameter name (cannot start with digit, [A-Za-z0-9_] only )
39 netCDF long description
40 netCDF units
41 An optional comment
42 These are all separated by semicolon (";"). To comment a whole line,
44 put any letter or special character (i.e. not a digit) in front of it.
45 Trailing spaces are ignored before each semicolon, but not after. The
46 GRIB number may have spaces in front. Parameters found in the separate
47 file take presidence over the default parameter table, those not listed
48 in the separate file are unchanged. All parameters will be named with
49 a level suffix in addition to the name assigned in the separate file.
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53 The command
54 gribtocdl -v -g my.tab sst.grib > sst.cdl
55 will decode the products in sst.grib and generate the corresponding CDL
57 code into file sst.cdl. The file my.tab contains a specific conversion
58 table to be used when naming a parameter from GRIB. Later the GRIB
59 file may be converted to netCDF by using gribtonc:
60 gribtonc -v -g my.tab sst.cdl sst.nc < sst.grib
61 The file my.tab looks like this:
63 Grib;netCDF;long name ;units;comments
64 31 ;CI ;Sea-ice cover ;none ;(0-1)
65 34 ;SSTK ;Sea surface temperature ;K ;
66 151 ;MSL ;Mean sea-level pressure ;Pa ;
67 167 ;T2M ;2 metre temperature ;K ;
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70 gribdump(1), gribtonc(1), netcdf(3), udunits(3)
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73 Error messages and log messages are written to stderr.
74 31 May 2002 GRIBTOCDL(1)