Description
Divide settlementArea within [0, totalArea] by positive totalArea.
Population indicators depend on compatible boundaries, time periods, counted groups, and denominator choices. A share or density can change when exclusions or daytime populations change, even without arithmetic error.
Divide settlementArea within [0, totalArea] by positive totalArea.
When to use this tool
Use Settlement Area Share when you need one transparent population-accounting component.
How to use the tool and how it works
- Enter settlementArea, totalArea. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read share. Use the output convention below.
Divide settlementArea within [0, totalArea] by positive totalArea.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| settlementArea | Settlement Area | Required. Finite number; minimum 0. |
| totalArea | Total Area | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| share | Dimensionless share under the stated denominator and exclusion convention. | Required. Finite number. |
{
"input": {
"settlementArea": 3,
"totalArea": 12
},
"output": {
"share": 0.25
}
}Limitations and assumptions
- Areas share units and compatible boundaries; the fraction does not determine a settlement definition, density, or land-use classification.
- 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 source definitions, geography, temporal alignment, and uncertainty before making a demographic or service-access conclusion.
References
Similar or alternative tools
- Population Grid Cell Area Share
Return eligibleCellArea and eligibleCellArea/studyArea.
- Population Cell Density Factor
Divide nonnegative integer population by positive cellArea for density.