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This article relates to GRIB edition 2 |
Problem
Setting the fixed surface keys in the wrong order can lead to incorrect values.
Solution
The keys in Section 4 that relate to fixed surface properties should be set such that the two "type" keys typeOfFirstFixedSurface typeOfSecondFixedSurface
are set before the scale keys.
For example:
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codes_handle* h = ...; ... codes_set_long(h, "typeOfFirstFixedSurface", 106); // Depth below land surface (m) codes_set_long(h, "typeOfSecondFixedSurface", 106); codes_set_long(h, "scaledValueOfFirstFixedSurface", 3); codes_set_long(h, "scaleFactorOfFirstFixedSurface", 2); codes_set_long(h, "scaledValueOfSecondFixedSurface", 5); codes_set_long(h, "scaleFactorOfSecondFixedSurface", 2); |
This should also be done when you define a "concept" like paramId, shortName etc in the definition files paramId.def, shortName.def etc. For example:
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...
#Mean sea water temperature in the upper 300 m
'151127' = {
discipline = 10 ;
parameterCategory = 4 ;
parameterNumber = 15 ;
typeOfFirstFixedSurface = 160 ;
typeOfSecondFixedSurface = 160 ;
scaledValueOfFirstFixedSurface = 0 ;
scaleFactorOfFirstFixedSurface = 0 ;
scaledValueOfSecondFixedSurface = 300 ;
scaleFactorOfSecondFixedSurface = 0 ;
}
... |
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