Description
Return yearCoordinate+suppliedOffset, allowing signed real coordinates and offsets.
Historical and regional records connect source vintages, era coordinates, folio sides, time coverage and locally defined units. Literal tokens and supplied offsets can organize metadata without authenticating an archive or establishing historical calendar equivalence. Preserve the original source and its conventions.
Return yearCoordinate+suppliedOffset, allowing signed real coordinates and offsets.
When to use this tool
Use Public Calendar Era Offset when checking the stated regional archival, chronology, coverage or unit convention.
How to use the tool and how it works
- Enter yearCoordinate, suppliedOffset. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read mappedCoordinate. Use the output convention below.
Return yearCoordinate+suppliedOffset, allowing signed real coordinates and offsets.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| yearCoordinate | Year Coordinate | Required. Finite number. |
| suppliedOffset | Supplied Offset | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| mappedCoordinate | Mapped Coordinate | Required. Finite number. |
{
"input": {
"yearCoordinate": 1400,
"suppliedOffset": 600
},
"output": {
"mappedCoordinate": 2000
}
}Limitations and assumptions
- A numerical offset is not a full calendar conversion, historical-era determination or civil-date validation.
- 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
Consult the original archive and appropriate historical/calendar/unit authorities for provenance and substantive interpretation.
References
Similar or alternative tools
- Public African Era Year Gap
Add supplied integer source/target origins to their whole year coordinates using exact arithmetic.
- African Archive Dual Date Token
Compare them literally and JSON-encode [firstCalendar,firstDate,secondCalendar,secondDate] as key.