...
Table D.1 Enumeration of quality flags
Enumeration | Description |
0 | Original/Reliable The data value is the original value retrieved from an external source and it successfully passes all validation criteria set. |
1 | Corrected/Reliable The original value was removed and corrected. Correction may be through interpolation or manual editing. |
2 | Completed/Reliable Original value was missing. Value has been filled in through interpolation, transformation (e.g. stage discharge) or a model. |
3 | Original/Doubtful Observed value retrieved from external data source. Value is valid, but marked as suspect due to soft validation limits being exceeded. |
4 | Corrected/Doubtful The original value was removed and corrected. However, the corrected value is doubtful due to validation limits. |
5 | Completed/Doubtful Original value was missing. Value has been filled in as above, but resulting value is doubtful due to limits in transformation/interpolation or input value used for transformation being doubtful. |
6 | Missing/Unreliable Observed value retrieved from external data source. Value is invalid due to validation limits set. Value is removed |
7 | Corrected/Unreliable The original value was removed and corrected. However, corrected value is unreliable and is removed. |
8 | Completed/Unreliable Original value was missing. Value has been filled in as above, but resulting value is unreliable and is removed. |
9 | Missing value in originally observed series. Note this is a special form of both Original/Unreliable and Original/Reliable. |
Next to the flag it is also possible to get or set information why the flag is as it is through the so-called flagSource. Since version 2012.01 FEWS stores not only the quality flags, but also the source of the flag, the so-called flagSource. So the user is able to see why a certain value is validated as unreliable, eg. due to exceeding of the hard max.
The list of flagSources is:
- IMP: flag is imported
- SN: soft min.
- HN: hard min.
- SX: soft max.
- HX: hard max.
- ROR: rate of rise
- ROF: rate of fall
- SR: same reading
- TS: temporary shift
- SC: secundairy validation, series comparison
- FC: secundairy validation, flag comparison
- KT: secundairy validation, Mann-Kendall test
- MAN: manual edit
Note |
---|
- No difference is made between historic and forecast data. This is not considered a quality flag. The data model of NFFS is constructed such that this difference is inherent to the data type definition.
- External sources may either be an actual external source, a forecasting module or a transformation. The convention in NFFS the definition of data series parameter types identifies the data source.
|