The maximum error in the model's predicted azimuth given the Pole of
rotations uncertainty and distance of the data point to the pole.

## Usage

`prd_err(dist_PoR, sigma_PoR = 1)`

## Arguments

- dist_PoR
Distance to Euler pole (great circle distance, in degree)

- sigma_PoR
uncertainty of the position of the Pole of rotation
(in degree).

## Value

numeric vector. The maximum error for azimuths prediction (in degree)

## References

Ramsay, J.A. Folding and fracturing of rocks. McGraw-Hill, New York, 1967.

## Examples

```
prd_err(67, 1)
#> [1] 0.9060055
```