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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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