Description
Apply a supplied north-reference offset to a strike angle.
Earth-science records distinguish depth signs, vertical datums, before-present ages, calibration factors and specimen definitions. Apparent porosity can be negative for inconsistent density inputs, and core recovery may exceed the drilled interval. Local labels and supplied transformations do not establish geological interpretation, physical validity or actual observation quality.
Apply a supplied north-reference offset to a strike angle.
When to use this tool
Use Geologic Structure Strike Reference North when you already have strikeDegrees, suppliedNorthReferenceOffsetDegrees and need to apply a supplied north-reference offset to a strike angle.
How to use the tool and how it works
- Enter strikeDegrees, suppliedNorthReferenceOffsetDegrees. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read referencedStrikeDegrees. Use the output convention below.
Reduce strike and offset separately modulo 360, add, then wrap into [0,360) degrees.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| strikeDegrees | Strike Degrees | Required. Finite number. |
| suppliedNorthReferenceOffsetDegrees | Supplied North Reference Offset Degrees | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| referencedStrikeDegrees | Directed [0,360) representation; no automatic 180-degree strike equivalence or declination model. | Required. Finite number. |
{
"input": {
"strikeDegrees": 350,
"suppliedNorthReferenceOffsetDegrees": 20
},
"output": {
"referencedStrikeDegrees": 10
}
}Limitations and assumptions
- No declination, grid convergence, right-hand rule or 180-degree undirected-strike equivalence is inferred. Floating-point boundary rounding can affect an extreme near-zero result.
- 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. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified survey, sample, sensor and timescale records with consistent units and reference frames. Apply the complete geological, hydrological or physical model when local density ratios, depth spans or calibration terms cannot establish the required interpretation.
References
Similar or alternative tools
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