Cable Yarder Lateral Yard Distance Calculator

Measure local log-to-corridor lateral distance from independently resolved planar line, no geodesy, cable deflection, rigging loads or yarding authorization. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

A yarder-corridor line can be represented by a point and a nonzero direction vector.

A yarder-corridor line can be represented by a point and a nonzero direction vector.^[1]

Perpendicular distance to that infinite line is distinct from distance to a finite corridor segment or a working envelope. Use this tool to calculate cable yarder lateral yard distance from the supplied measurements and assumptions.

When to use Cable Yarder Lateral Yard Distance Calculator

Use this tool to calculate cable yarder lateral yard distance from the supplied measurements and assumptions. Establish the species/site, survey protocol, units, sampled area or exposure, and the independently chosen reference or model.

How to use Cable Yarder Lateral Yard Distance Calculator and understand its results

Establish the species/site, survey protocol, units, sampled area or exposure, and the independently chosen reference or model.
Enter observedLogLocalXyM, callerCorridorLineDirectionXy, callerCorridorPointXy, using the field meanings and rules below, then run the tool.
Read observedLateralCorridorDistancesM. Interpret the fields using their units, signs and evidence conventions below.
If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.

Input field	Meaning	Value type	Requirement
observedLogLocalXyM	Observed log local xy m	list of list of number	Required
callerCorridorLineDirectionXy	Caller corridor line direction xy	list of number	Required
callerCorridorPointXy	Caller corridor point xy	list of number	Required

Enter an origin point, a nonzero corridor direction vector and measured stump positions as two-component vectors in meters. Compute absolute 2D cross product of stump-minus-origin with direction divided by direction norm for each stump. Return distance to the infinite line, with no segment endpoints, corridor width or work limit.

distanceM=abs((stump−origin) cross direction)/norm(direction)

Use the exact units, boundary rules, ordering and missing-evidence conventions above.

Output field	Meaning	Value type
observedLateralCorridorDistancesM	Observed Lateral Corridor Distances M; follow the units, sign, ordering and evidence convention stated above	list of number

json

{
  "input": {
    "observedLogLocalXyM": [
      [
        3,
        4
      ],
      [
        6,
        8
      ]
    ],
    "callerCorridorLineDirectionXy": [
      1,
      0
    ],
    "callerCorridorPointXy": [
      0,
      0
    ]
  },
  "output": {
    "observedLateralCorridorDistancesM": [
      4,
      8
    ]
  }
}

Limitations and assumptions

Perpendicular distance to that infinite line is distinct from distance to a finite corridor segment or a working envelope. Interpretation depends on the units, sampling scope and exact model described above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.

Alternative or Complementary methods

Use Crop Tree Release Spacing RD-Ratio Tool for this related task: Crown spacing can be compared with the sum of independently measured crown radii.

Use Active Crown Fire Spotting Distance Calculator when its separate inputs and assumptions fit the question: Integrating horizontal wind over an independently sampled ember flight time gives a conditional advection displacement.

References

Cable Yarder Lateral Yard Distance Calculator — tool.io

Similar or alternative tools

Crop Tree Release Spacing RD-Ratio Tool
Crown spacing can be compared with the sum of independently measured crown radii.
Active Crown Fire Spotting Distance Calculator
Integrating horizontal wind over an independently sampled ember flight time gives a conditional advection displacement.