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Planter Rootball Free Volume Tool

Signed free-volume budget using an independently supplied rootball/drainage intersection.

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Description

Subtract rootballVolume and drainageVolume from planterVolume and add their sharedVolume once.

Simple site geometry approximates an area, section, or volume using ideal shapes. Coherent length units and the distinction between signed and unsigned quantities determine the result's meaning.

Subtract rootballVolume and drainageVolume from planterVolume and add their sharedVolume once.

When to use this tool

Use Planter Rootball Free Volume when you need one transparent landscape geometry component.

How to use the tool and how it works

  1. Enter planterVolume, rootballVolume, drainageVolume, sharedVolume. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read freeVolume. Use the output convention below.

Subtract rootballVolume and drainageVolume from planterVolume and add their sharedVolume once.1

Input fieldMeaning and unitsAccepted input
planterVolumePlanter VolumeRequired. Finite number; minimum 0.
rootballVolumeRootball VolumeRequired. Finite number; minimum 0.
drainageVolumeDrainage VolumeRequired. Finite number; minimum 0.
sharedVolumeShared VolumeRequired. Finite number; minimum 0.
Output fieldInterpretationReturned shape
freeVolumeFree VolumeRequired. Finite number.
json
{
  "input": {
    "planterVolume": 100,
    "rootballVolume": 30,
    "drainageVolume": 10,
    "sharedVolume": 0
  },
  "output": {
    "freeVolume": 60
  }
}

Limitations and assumptions

  • Shared volume cannot exceed either component; freeVolume may be negative and suitability or drainage performance is not established.
  • 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

Use a surveyed terrain or construction model when irregular shapes, settlement, drainage, and structural performance matter.

References

  1. Calculation and input contract: landscape-architecture/planter-rootball-free-volume — tool.io

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