Description
Return a supplied artwork-date interval midpoint and half-width.
Exhibition and catalog budgets distinguish object-days, area support, estimated missing text, date envelopes and monetary rates. Each total depends on its denominator and counting convention. A local estimate or premium term does not establish a historical date, an insurance entitlement or an actual exhibition condition.
Return a supplied artwork-date interval midpoint and half-width.
When to use this tool
Use Artwork Date Range Midpoint when reconciling the stated artwork coverage, duration, uncertainty envelope or cost term.
How to use the tool and how it works
- Enter earliest, latest. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read midpoint, halfWidth. Use the output convention below.
Return a supplied artwork-date interval midpoint and half-width. Require earliest <= latest; midpoint = earliest/2+latest/2, halfWidth = (latest-earliest)/2.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| earliest | Earliest | Required. Finite number. |
| latest | Latest | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| midpoint | Midpoint | Required. Finite number. |
| halfWidth | Half Width | Required. Finite number. |
{
"input": {
"earliest": 1600,
"latest": 1620
},
"output": {
"midpoint": 1610,
"halfWidth": 10
}
}Limitations and assumptions
- These describe an input interval, not a probability distribution, confidence bound or independently established date.
- 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 exhibition, provenance and insurance records with the intended measurement and contractual conventions for substantive decisions.
References
Similar or alternative tools
- Artwork Date Interval Width
Return artwork year-range width under an endpoint policy.
- Exhibition Duration Object Day Term
Return display/loan object-days and time share.