EDM Line Change Inflation Percent Calculator
Signed observed EDM line-length percent change, not uniquely attributable inflation.
Description
EDM Line Change Inflation Percent Calculator: return signed distance change percent.
An electronic-distance-measurement line can be compared with its earlier length as a signed percentage. Interpretation requires the measurement geometry and uncertainty.
This tool returns signed distance change percent. Use the stated units and model convention when interpreting these fields.
When to use this tool
Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.
- Check the supported input and output contract against an existing calculation or observation.
- Use the complete example to confirm units, selector spelling and result interpretation.
How to use the tool and how it works
- Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Return 100 times (observedDistanceM-initialDistanceM) divided by the positive initial distance.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| initialDistanceM | Initial distance m. Meters. | Finite number; greater than zero |
| observedDistanceM | Observed distance m. Meters. | Finite number; greater than zero |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.signedDistanceChangePercent | Signed distance change percent; use the stated units and sign convention. |
{
"input": {
"initialDistanceM": 100,
"observedDistanceM": 101
},
"output": {
"result": {
"signedDistanceChangePercent": 1
}
}
}Limitations and assumptions
- Positive values mean extension and negative values shortening. No deformation source or inflation model is solved.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.
References
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