Description
Return sampledUnion=first+second-overlap, sampledShare=union/blockArea, and remainingArea=blockArea-union.
Laboratory records distinguish specimen identity, sampling coverage, retained quantities, processing times, image scale, and measurement uncertainty. Areas, volumes, counts, and source-support flags measure different aspects of a record. A local calculation does not identify tissue or establish diagnostic adequacy.
Return sampledUnion=first+second-overlap, sampledShare=union/blockArea, and remainingArea=blockArea-union.
When to use this tool
Use Tissue Block Sampling Area Share when you need this specimen-record, sampling, processing-time, dimensional, or uncertainty calculation.
How to use the tool and how it works
- Enter blockArea, sampledArea, overlapArea, secondSampleArea. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read sampledUnion, sampledShare, remainingArea. Use the output convention below.
Require positive blockArea, nonnegative sampledArea and secondSampleArea, overlap within both, and their union no greater than blockArea. Return sampledUnion=first+second-overlap, sampledShare=union/blockArea, and remainingArea=blockArea-union.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| blockArea | Block Area | Required. Finite number; strictly above 0. |
| sampledArea | Sampled Area | Required. Finite number; minimum 0. |
| overlapArea | Overlap Area | Required. Finite number; minimum 0. |
| secondSampleArea | Second Sample Area | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| sampledUnion | Sampled Union | Required. Finite number. |
| sampledShare | Sampled Share | Required. Finite number. |
| remainingArea | Remaining Area | Required. Finite number. |
{
"input": {
"blockArea": 100,
"sampledArea": 20,
"overlapArea": 5,
"secondSampleArea": 15
},
"output": {
"sampledUnion": 30,
"sampledShare": 0.3,
"remainingArea": 70
}
}Limitations and assumptions
- Areas need one unit and pair overlap is supplied rather than calculated geometrically. Area coverage alone does not establish representative or diagnostically adequate sampling.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- 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
Use validated laboratory procedures, traceable measurements, and authenticated specimen records for a complete assessment. Check the relevant sampling and processing assumptions before interpreting a local quantity.
References
Similar or alternative tools
- Tissue Block Sampling Share
Sum all volumes into totalVolume and selected valid-source volumes into sampledValidVolume; return their share when positive, otherwise zero with defined=false.
- Slide Region Area Fraction
Compute a supplied research annotation area fraction without diagnostic classification.