Examples
Examples
Try the starting example
- Line trend or plane strike (degrees)
- 45
- Line plunge or plane dip (degrees)
- 30
- Input type: 0 line; 1 plane pole (right-hand rule)
- 0
- Projection: 0 equal-area; 1 equal-angle
- 0
- Stereonet east,north coordinates
- [0.5,0.5]
Try another scenario
- Line trend or plane strike (degrees)
- 49.50000000000001
- Line plunge or plane dip (degrees)
- 30
- Input type: 0 line; 1 plane pole (right-hand rule)
- 0
- Projection: 0 equal-area; 1 equal-angle
- 0
- Stereonet east,north coordinates
- [0.53768821473,0.459229119003]
Calculation method
Calculation method
Stereonet east,north coordinates
Lower hemisphere unit disk: radius=sqrt(2)sin((90−plunge)/2) equal-area; tan((90−plunge)/2) equal-angle. Plane uses lower pole.
Symbols and units
- a
- Line trend or plane strike (degrees)
- b
- Line plunge or plane dip (degrees)
- c
- Input type: 0 line; 1 plane pole (right-hand rule)
- d
- Projection: 0 equal-area; 1 equal-angle
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
- Plane-line orientations, projection convention. Returns Stereonet plot coordinates. 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 or plane strike (degrees): minimum 0, maximum 360. Line plunge or plane dip (degrees): minimum 0, maximum 90. Input type: 0 line; 1 plane pole (right-hand rule): minimum 0, maximum 1. Projection: 0 equal-area; 1 equal-angle: minimum 0, maximum 1.
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.