Description
Calculate accessibleLength=sum(accessibleSegments)-suppliedOverlap and accessShare=accessibleLength/perimeter.
A planning scenario combines parcel dimensions, frontage, service space, and explicitly supplied rules. Gross, excluded, and counted areas can use different bases. A geometric result describes the chosen model while site conditions and the governing requirements need separate verification.
Calculate accessibleLength=sum(accessibleSegments)-suppliedOverlap and accessShare=accessibleLength/perimeter.
When to use this tool
Use Block Perimeter Access Share when you need the stated geometric or planning-indicator term under supplied site dimensions and rule choices.
How to use the tool and how it works
- Enter perimeter, accessibleSegments, suppliedOverlap. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read accessibleLength, accessShare. Use the output convention below.
Calculate accessibleLength=sum(accessibleSegments)-suppliedOverlap and accessShare=accessibleLength/perimeter. Require positive perimeter and a feasible nonnegative union length within it.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| perimeter | Perimeter | Required. Finite number; strictly above 0. |
| accessibleSegments | Accessible Segments | Required. Array of finite number; maximum items 256. |
| suppliedOverlap | Supplied Overlap | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| accessibleLength | Accessible Length | Required. Finite number. |
| accessShare | Access Share | Required. Finite number. |
{
"input": {
"perimeter": 100,
"accessibleSegments": [
30,
20
],
"suppliedOverlap": 10
},
"output": {
"accessibleLength": 40,
"accessShare": 0.4
}
}Limitations and assumptions
- Overlap is supplied rather than derived geometrically. Length membership does not establish legal access, a continuous accessible route, or accessibility 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
Use measured site geometry and the applicable authoritative definitions when a planning decision needs more than this supplied term. A complete layout, access, or structural review can require additional models.
References
Similar or alternative tools
- Block Perimeter Active Frontage Share
Calculate eligibleFrontage=perimeter-excludedFrontage and fraction=activeFrontage/eligibleFrontage.
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