Site Catchment Radius Walk-Time Calculator
Caller explicitly effective walk speed/time scenario after stops, not terrain/network catchment, travel safety or settlement access reconstruction. Caller independently establishes sample/context/calibration applicability; not definitive chronology, provenance, taxonomy, disease or human identity.
Description
A catchment radius can be estimated from a travel budget and effective walking speed.
A catchment radius can be estimated from a travel budget and effective walking speed.1
Straight-line reach differs from terrain-constrained paths and return-trip planning. Use Site Catchment Radius Walk-Time Calculator to evaluate the supplied inputs under the model explained below.
When to use Site Catchment Radius Walk-Time Calculator
Use Site Catchment Radius Walk-Time Calculator to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Site Catchment Radius Walk-Time Calculator and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Caller effective planar walking speed meters per minute, Caller available walk minutes, Caller already budgeted stop minutes using the field table and validation rules below, then run the tool.
- Read Conditional straight line catchment radius meters; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerEffectivePlanarWalkingSpeedMetersPerMinute | Caller effective planar walking speed meters per minute | number | Required; constraints below |
| callerAvailableWalkMinutes | Caller available walk minutes | number | Required; constraints below |
| callerAlreadyBudgetedStopMinutes | Caller already budgeted stop minutes | number | Required; constraints below |
Enter positive effective planar speed in m/min and nonnegative available and already budgeted stop times in min, with stops≤available. Multiply speed by available−stops for radius in m. All available moving time is used one way; no automatic halving for a return journey, terrain path or accessibility analysis occurs.
radiusM=callerEffectiveSpeed×(availableMinutes−stopMinutes) Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| conditionalStraightLineCatchmentRadiusMeters | Conditional straight line catchment radius meters | number |
{
"input": {
"callerEffectivePlanarWalkingSpeedMetersPerMinute": 50,
"callerAvailableWalkMinutes": 20,
"callerAlreadyBudgetedStopMinutes": 5
},
"output": {
"conditionalStraightLineCatchmentRadiusMeters": 750
}
}Limitations and assumptions
Straight-line reach differs from terrain-constrained paths and return-trip planning. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use Site Size From Artifact Scatter Calculator for a related task: An artifact scatter's convex hull encloses its measured outer points.
Use Site Grid Coordinate Converter for a related task: A local site grid can be scaled, rotated and translated into a shared planar frame.
References
Similar or alternative tools
- Site Size From Artifact Scatter Calculator
An artifact scatter's convex hull encloses its measured outer points.
- Site Grid Coordinate Converter
A local site grid can be scaled, rotated and translated into a shared planar frame.