pub fn to_lonlat_from_pwd_mercator(x: f64, y: f64) -> (f64, f64)Expand description
Approximate inverse of the projection PowerWorld’s auto generated layouts
use (verified against ACTIVSg200/2000 to within ~0.02 degrees): longitude
is x / K, latitude the inverse Gudermannian of y / K. Hand edited
diagrams drift from this, so treat the result as approximate.