Knapping Floor Refit Cluster Density Calculator
Distinct independently identified knapping refit cluster footprint density and fragment density on actually surveyed floor area, notconjoingraphor assumed complete production event count. Caller independently establishes sample/context/calibration applicability; not definitive chronology, provenance, taxonomy, disease or human identity.
Description
Refit-cluster density combines independently assigned clusters with a surveyed floor area.
Refit-cluster density combines independently assigned clusters with a surveyed floor area.1
Cluster counts and fragment counts measure different aspects of the recorded assemblage. Use Knapping Floor Refit Cluster Density Calculator to evaluate the supplied inputs under the model explained below.
When to use Knapping Floor Refit Cluster Density Calculator
Use Knapping Floor Refit Cluster Density 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 Knapping Floor Refit Cluster Density Calculator and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed refit cluster ids, Observed refit fragment counts, Independently surveyed floor area m2 using the field table and validation rules below, then run the tool.
- Read Distinct observed cluster count, Observed clusters per m2, Observed fragments per m2; 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 |
|---|---|---|---|
| observedRefitClusterIds | Observed refit cluster ids | array of string | Required; constraints below |
| observedRefitFragmentCounts | Observed refit fragment counts | array of number | Required; constraints below |
| independentlySurveyedFloorAreaM2 | Independently surveyed floor area m2 | number | Required; constraints below |
Enter nonempty aligned cluster IDs and nonnegative safe-integer fragment counts plus positive surveyed area in m². Count distinct exact IDs and return that count/area and total fragments/area. Duplicate and blank IDs are not rejected by this compute path; duplicates reduce distinct cluster count but do not remove their fragment counts. No refitting or clustering algorithm is applied.
clustersPerM2=distinctIdCount/area; fragmentsPerM2=ΣobservedFragmentCounts/area Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| distinctObservedClusterCount | Distinct observed cluster count | number |
| observedClustersPerM2 | Observed clusters per m2 | number |
| observedFragmentsPerM2 | Observed fragments per m2 | number |
{
"input": {
"observedRefitClusterIds": [
"a",
"b",
"a"
],
"observedRefitFragmentCounts": [
2,
3,
4
],
"independentlySurveyedFloorAreaM2": 3
},
"output": {
"distinctObservedClusterCount": 2,
"observedClustersPerM2": 0.6666666666666666,
"observedFragmentsPerM2": 3
}
}Limitations and assumptions
Cluster counts and fragment counts measure different aspects of the recorded assemblage. 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 Use-Wear Polish Classifier for a related task: Use-wear interpretation combines independently observed surface features with a reference model.
Use Site Size From Artifact Scatter Calculator for a related task: An artifact scatter's convex hull encloses its measured outer points.
References
Similar or alternative tools
- Use-Wear Polish Classifier
Use-wear interpretation combines independently observed surface features with a reference model.
- Site Size From Artifact Scatter Calculator
An artifact scatter's convex hull encloses its measured outer points.