|A value used as part of the calibration of an instrument at a particular time.
|Data are the result of a mathematical transformation where there is some subjectivity in the selected equation form and/or where parameters are typically fitted. A rating curve relating stage to discharge is a transformation that fits this definition; therefore stage is observed but discharge is derived.
|Values that are roughly calculated, judged, or approximated. Values may result from professional judgement or from ancillary data.
|Data reflect the measurement the sensor is designed to make, reported at the frequency of data collection
|Model Simulation Result
|Values generated by a simulation model
|Observation that is the result of analyzing a sample in a laboratory
|The value type is unknown