Stems Per Hectare Density Calculator
Actual independently qualifying live-stem count per actual sampled hectare, no Rein eke normalization or assumed full plot census.
Description
A sampled stem-density estimate depends on independently qualified live stems and measured plot area.
A sampled stem-density estimate depends on independently qualified live stems and measured plot area.1
This tool calculates stems per hectare without inferring a complete forest census or a normalized density index.
When to use Stems Per Hectare Density Calculator
Use this tool to calculate stems per hectare without inferring a complete forest census or a normalized density index.
How to use Stems Per Hectare Density Calculator and how it works
- Prepare actualMeasuredLiveStemCount, actualSampledPlotAreaHectares, with the units, conventions and assumptions below.
- Enter the required fields and run Stems Per Hectare Density Calculator.
- Read result.value using the output definitions below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualMeasuredLiveStemCount | Actual Measured Live Stem Count. Use the units and matching context stated in the calculation below. | number | Required; integer 0–1000000; finite; other constraints below |
| actualSampledPlotAreaHectares | Actual Sampled Plot Area Hectares. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Require a stem count that is an integer from 0 to 1,000,000 and a strictly positive sampled area in hectares. Return count divided by area as stems per hectare. The sampling design and which stems qualify are caller-established.
densityStemsPerHectare=count/areaHectares Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Observed live-stem density in stems per hectare. | number |
{
"input": {
"actualMeasuredLiveStemCount": 10,
"actualSampledPlotAreaHectares": 2
},
"output": {
"result": {
"value": 5
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Under Bark Diameter Calculator for a complementary operation: Under-bark diameter subtracts bark thickness on both sides of an over-bark diameter.
Use Double Bark Thickness Calculator for a complementary operation: Double bark thickness is a diametral difference, twice the corresponding radial-thickness convention.
References
-
Stems Per Hectare Density Calculator — tool.io
Similar or alternative tools
- Under Bark Diameter Calculator
Under-bark diameter subtracts bark thickness on both sides of an over-bark diameter.
- Double Bark Thickness Calculator
Double bark thickness is a diametral difference, twice the corresponding radial-thickness convention.