Description
Return netArea = firstArea+secondArea-overlap and seedAmount = netArea*seedPerArea.
Area and boundary terms describe different spatial properties. Adding areas requires an overlap convention, while dividing perimeter by area introduces an inverse-length scale rather than a dimensionless measure of habitat quality.
Return netArea = firstArea+secondArea-overlap and seedAmount = netArea*seedPerArea.
When to use this tool
Use Restoration Seed Area Overlap Deduction when checking a local spatial quantity under supplied area and boundary assumptions.
How to use the tool and how it works
- Enter firstArea, secondArea, overlap, seedPerArea. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read netArea, seedAmount. Use the output convention below.
Require nonnegative firstArea, secondArea and seedPerArea, with overlap between zero and min(firstArea,secondArea). Return netArea = firstArea+secondArea-overlap and seedAmount = netArea*seedPerArea. The seed rate is amount per the supplied area unit.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstArea | First Area | Required. Finite number; minimum 0. |
| secondArea | Second Area | Required. Finite number; minimum 0. |
| overlap | Overlap | Required. Finite number; minimum 0. |
| seedPerArea | Seed Per Area | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| netArea | Net Area | Required. Finite number. |
| seedAmount | Seed Amount | Required. Finite number. |
{
"input": {
"firstArea": 100,
"secondArea": 80,
"overlap": 20,
"seedPerArea": 0.03
},
"output": {
"netArea": 160,
"seedAmount": 4.8
}
}Limitations and assumptions
- This deducts only the supplied two-area overlap. It does not map spatial geometry, check ecological suitability, recommend seeding density or account for viability and establishment losses.
- 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 mapped geometry or spatial analysis for actual overlaps, boundaries and heterogeneous restoration requirements.
References
Similar or alternative tools
- Biodiversity Offset Supplied Multiplier Term
Return lostUnits = impactedArea*conditionFraction, requiredCredits = lostUnits*requiredMultiplier and restoredArea = requiredCredits/creditPerRestoredArea.
- Land Cover Patch Edge Area Ratio
Return ratio = perimeter/area.