Flake Platform Angle Measurement Tool
Flake Platform actual ordered planar-ray angle from independently identified measurement landmarks;3 Dprojection, protocol and biological interpretation caller established. Caller independently establishes sample/context/calibration applicability; not definitive chronology, provenance, taxonomy, disease or human identity.
Description
A platform angle is measured between independently defined planar ray directions.
A platform angle is measured between independently defined planar ray directions.1
It does not infer the original knapping force or reconstruct a three-dimensional platform automatically. Use Flake Platform Angle Measurement Tool to evaluate the supplied inputs under the model explained below.
When to use Flake Platform Angle Measurement Tool
Use Flake Platform Angle Measurement Tool to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Flake Platform Angle Measurement Tool and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed flake platform ray one, Observed flake platform ray two using the field table and validation rules below, then run the tool.
- Read Observed planar angle degrees; 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 |
|---|---|---|---|
| observedFlakePlatformRayOne | Observed flake platform ray one | array of number | Required; constraints below |
| observedFlakePlatformRayTwo | Observed flake platform ray two | array of number | Required; constraints below |
Enter two finite nonzero planar ray vectors with exactly two components each. Normalize, clamp the dot product to [−1,1] and convert acos to degrees 0–180. No ray extraction, platform reconstruction or three-dimensional measurement occurs.
angleDegrees=acos(clamp(dot(normalizedRay1,normalizedRay2),−1,1))×180/π Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| observedPlanarAngleDegrees | Observed planar angle degrees | number |
{
"input": {
"observedFlakePlatformRayOne": [
1,
0
],
"observedFlakePlatformRayTwo": [
0,
1
]
},
"output": {
"observedPlanarAngleDegrees": 90
}
}Limitations and assumptions
It does not infer the original knapping force or reconstruct a three-dimensional platform automatically. 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 Mandibular Gonial Angle Measurement Tool for a related task: A gonial-angle measurement depends on independently defined rays and a measurement plane.
Use Prismatic Blade Length Width Ratio for a related task: A blade's length-to-width ratio describes measured shape.
References
-
Flake Platform Angle Measurement Tool — tool.io
Similar or alternative tools
- Mandibular Gonial Angle Measurement Tool
A gonial-angle measurement depends on independently defined rays and a measurement plane.
- Prismatic Blade Length Width Ratio
A blade's length-to-width ratio describes measured shape.