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Urban Soil Test Sample Area Weight Term Tool

Calculate urban soil test sample area weight term from explicit caller-supplied inputs.

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Description

Calculate areaWeighted=sum(results[i]*areas[i])/sum(areas), requiring aligned arrays, nonnegative areas, and positive total area.

A farm or garden budget depends on a common area, quantity, observation period, and system boundary. Recovery, exclusions, overlap, and allocation change how a share is calculated. Supplied accounting or geometry terms remain separate from measured crop performance and verified environmental outcomes.

Calculate areaWeighted=sum(results[i]*areas[i])/sum(areas), requiring aligned arrays, nonnegative areas, and positive total area.

When to use this tool

Use Urban Soil Test Sample Area Weight Term when you need a clearly bounded area, material, resource, energy, or allocation term for supplied garden or farm records.

How to use the tool and how it works

  1. Enter results, areas. Keep parallel arrays aligned. 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 areaWeighted. Use the output convention below.

Calculate areaWeighted=sum(results[i]*areas[i])/sum(areas), requiring aligned arrays, nonnegative areas, and positive total area.1

Input fieldMeaning and unitsAccepted input
resultsResultsRequired. Array of finite number; maximum items 256.
areasAreasRequired. Array of finite number; maximum items 256.
Output fieldInterpretationReturned shape
areaWeightedArea WeightedRequired. Finite number.
json
{
  "input": {
    "results": [
      2,
      6
    ],
    "areas": [
      10,
      30
    ]
  },
  "output": {
    "areaWeighted": 5
  }
}

Limitations and assumptions

  • Results need a common measurement and assay basis; areas must represent the intended sampling weights. No soil interpolation, contaminant assessment, sample quality, or growing-safety decision is inferred.
  • 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

Verify the system boundary, units, and source records before combining this term into a resource or environmental report. Physical design and crop-performance questions require appropriate measurements and a broader model.

References

  1. Calculation and input contract: urban-agriculture/urban-soil-test-sample-area-weight-term — tool.io

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