Description
Calculate a supplied completed-visit opportunity fraction.
Biodiversity records distinguish surveyed sites, nondetection, counts, sampling units, voucher references and source-qualified taxonomic states. A coordinate-precision label changes metadata rather than protecting a location. Relative abundance and mean count per represented unit depend on their supplied denominators and survey scope.
Calculate a supplied completed-visit opportunity fraction.
When to use this tool
Use Plot Detection Opportunity when you already have scheduledVisits, completedVisits and need to calculate a supplied completed-visit opportunity fraction.
How to use the tool and how it works
- Enter scheduledVisits, completedVisits. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read completedOpportunityFraction, missedVisits. Use the output convention below.
Require positive safe scheduledVisits and completedVisits a safe count from zero through scheduledVisits; return completed/scheduled and scheduled-completed.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| scheduledVisits | Scheduled Visits | Required. Safe integer; minimum 1. |
| completedVisits | Completed Visits | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| completedOpportunityFraction | Completed Opportunity Fraction | Required. Finite number. |
| missedVisits | Missed Visits | Required. Safe integer. |
{
"input": {
"scheduledVisits": 8,
"completedVisits": 6
},
"output": {
"completedOpportunityFraction": 0.75,
"missedVisits": 2
}
}Limitations and assumptions
- This is a count of opportunities, not a detection probability or quality measure. Visit duration, independent effort and actual completion are not verified.
- 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
Review specimens, original observations, sampling design and controlled taxonomic sources. Use complete detection, population and spatial methods when a local count fraction, source label or precision bin cannot answer the ecological or disclosure question.
References
Similar or alternative tools
- Source Checklist Presence Code
Encode supplied surveyed/present flags as an observation state.
- Biodiversity Sampling Unit Count Term
Calculate supplied observed count per represented sampling unit.