Description
Supplied parcel-dimension ratio without zoning or buildability interpretation.
Planning indicators combine supplied counts, time intervals, distances, and area definitions. The denominator, geometric envelope, and category boundaries affect a reported density or share. A scenario calculation follows those assumptions while the governing rules and actual site conditions require separate verification.
Supplied parcel-dimension ratio without zoning or buildability interpretation.
When to use this tool
Use Parcel Frontage Depth Ratio when you need an explicit scenario indicator from supplied site dimensions, service records, or policy assumptions.
How to use the tool and how it works
- Enter frontage, depth, suppliedFrontageExclusion, excludeMarked. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read effectiveFrontage, ratio. Use the output convention below.
Subtract suppliedFrontageExclusion only when excludeMarked for effectiveFrontage, then divide by positive depth for ratio. Require nonnegative frontage and an exclusion no greater than it.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| frontage | Frontage | Required. Finite number; minimum 0. |
| depth | Depth | Required. Finite number; strictly above 0. |
| suppliedFrontageExclusion | Supplied Frontage Exclusion | Required. Finite number; minimum 0. |
| excludeMarked | Exclude Marked | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| effectiveFrontage | Effective Frontage | Required. Finite number. |
| ratio | Dimensionless ratio under compatible input units and the stated formula. | Required. Finite number. |
{
"input": {
"frontage": 20,
"depth": 40,
"suppliedFrontageExclusion": 4,
"excludeMarked": true
},
"output": {
"effectiveFrontage": 16,
"ratio": 0.4
}
}Limitations and assumptions
- The exclusion is validated even when not applied. The ratio uses a shared length unit; it does not establish a parcel measurement convention, frontage eligibility, or zoning compliance.
- The field tables state structural bounds; the mechanics also specify cross-field constraints. Malformed inputs and unsupported domains cause errors. A successful false flag, empty branch value, or zero placeholder has the meaning stated above and is distinct from an input error.
- 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. Signed zero is exported as zero.
Alternative or Complementary methods
Check measured site data and the applicable authoritative definitions before using a scenario in a planning decision. Geographic analysis, transport modeling, or a complete design review may be needed beyond the stated term.
References
Similar or alternative tools
- Parcel Split Frontage Width Budget
Subtract accessWidth once from frontage for totalUsable and divide by positive integer parcels for equalFrontage.
- Parcel Setback Area Term
Compute one rectangular setback strip from supplied dimensions without accounting for corner overlaps or zoning rules.