| Excerpt |
|---|
|
Testing excerpt content Why am I not able to set th |
Solution
The GRIB format does keep track of missing values but through the use of a bitmap It does not allow the specification of a missing value. Setting the missing value is a feature that can be used only when encoding the data values stored in a GRIB message. |
Missing values cannot be encoded in a GRIB message. The GRIB format does keep track of missing values but through the use of a bitmap It does not allow the specification of a missing value. Setting the missing value is a feature that can be used only when encoding the data values stored in a GRIB message. This of course means that is the responsibility of the user to know what missing value is meaningful to the data. A default value of 9999 is set for the missing value in the library (not the GRIB message!). That means that when retrieving the values from a message without having set the missing value key, all missing values in the data will be replaced with the default value of 9999.
| Panel |
|---|
| borderColor | black |
|---|
| bgColor | #fff |
|---|
| borderStyle | solid |
|---|
|
A small example on the use of the missing value during encoding can be found here: grib_set_bitmap. During decoding it is advisable to query the bitmap directly to discover missing data values. See example here: grib_iterator_bitmap |
Related articles
| Content by Label |
|---|
| showLabels | false |
|---|
| max | 5 |
|---|
| spaces | ~usa |
|---|
| showSpace | false |
|---|
| sort | modified |
|---|
| reverse | true |
|---|
| type | page |
|---|
| cql | label = in ("kb-troubleshooting-article","eccodes-faqs","grib","missing-values","bitmap","encode") and label in ("grib","missing-values") and type = "page" and space = "~usaUDOC" |
|---|
| labels | kb-troubleshooting-article |
|---|
|
...
...