Description
Sum eligible time and time satisfying all flags, then divide or return zero with defined false for no eligible time.
Wildlife survey effort can use observer-hours, trap-nights, observation windows, or repeated visits. Equivalent effort applies a declared reporting rule and does not automatically correct detection probability.
Sum eligible time and time satisfying all flags, then divide or return zero with defined false for no eligible time.
When to use this tool
Use Amphibian Survey Support Share when you need one explicit herpetological survey-effort component.
How to use the tool and how it works
- Enter visitDurations, habitatEligible, weatherValid, observerPresent. Keep parallel arrays aligned. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read eligibleTime, supportedTime, share, defined. Inspect defined before interpreting the associated values.
Require aligned nonnegative visitDurations and habitatEligible, weatherValid, and observerPresent flags. Sum eligible time and time satisfying all flags, then divide or return zero with defined false for no eligible time.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| visitDurations | Visit Durations | Required. Array of finite number; minimum 0; maximum items 256. |
| habitatEligible | Habitat Eligible | Required. Array of boolean; maximum items 256. |
| weatherValid | Weather Valid | Required. Array of boolean; maximum items 256. |
| observerPresent | Observer Present | Required. Array of boolean; maximum items 256. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| eligibleTime | Eligible Time | Required. Finite number. |
| supportedTime | Supported Time | Required. Finite number. |
| share | Dimensionless share under the stated denominator and exclusion convention. | Required. Finite number. |
| defined | Whether the associated ratio has its required denominator; inspect before using a zero placeholder. | Required. Boolean. |
{
"input": {
"visitDurations": [
2,
3,
5
],
"habitatEligible": [
true,
true,
false
],
"weatherValid": [
true,
true,
true
],
"observerPresent": [
true,
false,
true
]
},
"output": {
"eligibleTime": 5,
"supportedTime": 2,
"share": 0.4,
"defined": true
}
}Limitations and assumptions
- The share is duration weighted and flags are supplied; no weather criteria, habitat quality, detection probability, or survey validity is independently assessed.
- 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 the complete survey design, environmental conditions, detection methods, and appropriate wildlife protocols.
References
Similar or alternative tools
- Reptile Survey Basking Window Overlap
Return their nonnegative overlap and its fraction of survey duration.
- Herpetofauna Survey Effort Hour Factor
Sum nonnegative observerMinutes and divide by positive minutesPerHour.