Ermine Spot Pattern Density Calculator
Observed ermine-spot density per declared inspected area, not an inferred heraldic authenticity criterion.
Description
Ermine spot density relates annotated spots to the inspected area.
Ermine spot density relates annotated spots to the inspected area.1
The area unit and counting boundary must stay consistent for comparisons.
When to use Ermine Spot Pattern Density Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the source tradition, viewing frame, coordinate units and independently annotated features.
How to use Ermine Spot Pattern Density Calculator and understand its results
- Establish the source tradition, viewing frame, coordinate units and independently annotated features.
- Enter observedErmineSpotCount, inspectedFieldArea, using the field meanings and rules below, then run the tool.
- Read result.spotDensity, using the output meanings and calculation rules below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedErmineSpotCount | Observed ermine spot count | number | Required |
| inspectedFieldArea | Inspected field area | number | Required |
Use a nonnegative safe-integer annotated spot count and positive inspected area. Divide count by area, preserving the declared area unit.
spotDensity=spotCount/inspectedArea Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Calculated observation or reference | object |
| result.spotDensity | spot Density | number |
{
"input": {
"observedErmineSpotCount": 12,
"inspectedFieldArea": 60
},
"output": {
"result": {
"spotDensity": 0.2
}
}
}Limitations and assumptions
Spot identification and area measurement are supplied. No ideal spacing, pattern regularity or image recognition is assessed.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Heraldic Fur Area Coverage Analyzer: Fur coverage is the sum of independently measured fur-region areas relative to the whole field. For a complementary comparison, use Vair Bell Pattern Unit Counter: Vair patterns contain repeated bell-like units that may be cut at row boundaries.
References
-
Ermine Spot Pattern Density Calculator — tool.io
Similar or alternative tools
- Heraldic Fur Area Coverage Analyzer
Fur coverage is the sum of independently measured fur-region areas relative to the whole field.
- Vair Bell Pattern Unit Counter
Vair patterns contain repeated bell-like units that may be cut at row boundaries.