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Local definitions are required when one needs to store information which is not part of the standard GRIB header. This would typically be a mars key (like |
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Please note: First of all ask the data provider for any local tables/definitions which they used in their GRIB messages. |
Step-by-step guide
Local tables for parameters
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/usr/local/share/eccodes/definitions/grib[edition]/localConcepts/[centre:s] |
So for example the GRIB edition 2 local parameters for DWD (centre=edzw) are defined in definitions/grib2/localConcepts/edzw
and GRIB edition 1 local parameters for SMHI (centre=eswi) are in definitions/grib1/localConcepts/eswi
.
The following are examples in an example of the contents for the above files in order to handle ECMWF parameter Geopotential
in GRIB edition 1:
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#Geopotential 'Geopotential' = { table2Version = 128 ; indicatorOfParameter = 129 ; } |
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#Geopotential#Geopotential '129' = { table2Version = 128 ; indicatorOfParameter = 129 ; } |
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#Geopotential 'z' = { table2Version = 128 ; indicatorOfParameter = 129 ; } |
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#Geopotential 'm**2 s**-2' = { table2Version = 128 ; indicatorOfParameter = 129 ; } |
In And for GRIB edition 2, the contents of the same files for parameter Geopotential
Potential temperature gradient
are:
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#Geopotential#Potential temperature gradient 'GeopotentialPotential temperature gradient' = { discipline = 0192 ; parameterCategory = 3129 ; parameterNumber = 43 ; } |
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#Geopotential#Potential temperature gradient '129129003' = { discipline = 0192 ; parameterCategory = 3129 ; parameterNumber = 43 ; } |
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#Geopotential#Potential temperature gradient 'zptgrd' = { discipline = 0192 ; parameterCategory = 3129 ; parameterNumber = 43 ; } |
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#Geopotential 'm**2 s**-2#Potential temperature gradient 'K' = { discipline = 0192 ; parameterCategory = 3129 ; parameterNumber = 43 ; } |
Local Definitions (Local Use section)
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Also please study the slides here: Training course presentation.
And the How-To Article GRIB: Converting edition 1 to 2 (The "Local configuration" section)
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