Examples
Examples
Try the starting example
- Line trend (degrees)
- 70
- Line plunge down (degrees)
- 30
- Vertical section azimuth (degrees)
- 40
- Projected line angle below section horizontal (degrees)
- 33.690068
Try another scenario
- Line trend (degrees)
- 77
- Line plunge down (degrees)
- 30
- Vertical section azimuth (degrees)
- 40
- Projected line angle below section horizontal (degrees)
- 35.863951
Calculation method
Calculation method
Projected line angle below section horizontal (degrees)
atan2(sin plunge,cos plunge cos(trend−section azimuth)); oriented projection can exceed90 degrees.
Symbols and units
- a
- Line trend (degrees)
- b
- Line plunge down (degrees)
- c
- Vertical section azimuth (degrees)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Trend-plunge, section orientation. Returns Projected line angle. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Line trend (degrees): minimum 0, maximum 360. Line plunge down (degrees): minimum -90, maximum 90. Vertical section azimuth (degrees): minimum 0, maximum 360.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.