Description
Return cutoff-sourceAt and whether sourceAt exceeds cutoff.
Agricultural time series depend on clock origins, reporting intervals, source vintage and crop-season labeling. A supplied clock offset can reconcile timestamps, while matching source labels alone cannot prove clock synchronization. Calendar-year labels and start-year/end-year crop-season labels use different boundary conventions.
Return cutoff-sourceAt and whether sourceAt exceeds cutoff.
When to use this tool
Use Field Boundary Source Age when checking the stated clock, period, reporting-support or season-label convention.
How to use the tool and how it works
- Enter sourceAt, cutoff. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read age, futureSource. Inspect futureSource before interpreting the associated values.
Return cutoff-sourceAt and whether sourceAt exceeds cutoff. Keep a negative age when the supplied source lies in the future.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| sourceAt | Source At | Required. Finite number. |
| cutoff | Cutoff | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| age | Age | Required. Finite number. |
| futureSource | Future Source | Required. Boolean. |
{
"input": {
"sourceAt": 10,
"cutoff": 25
},
"output": {
"age": 15,
"futureSource": false
}
}Limitations and assumptions
- Use one clock and time unit; record age does not verify accuracy, provenance or fitness for a decision.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified time metadata, calibrated clocks and the relevant complete crop/calendar conventions for actual temporal alignment and interpretation.
References
Similar or alternative tools
- Farm Task Clock Source Flag
Compare clock-source labels literally.
- Farm Event Source Delay
Normalize eventTime by subtracting sourceOffset.