Struct Ellipsoid 

pub struct Ellipsoid {
    pub a: f64,
    pub f: f64,
}

A reference ellipsoid.

Fields

a: f64

Semi-major axis (equatorial radius) in meters.

f: f64

Flattening (f = (a - b) / a).

Implementations

impl Ellipsoid

pub const fn from_a_rf(a: f64, rf: f64) -> Self

Create an ellipsoid from semi-major axis and inverse flattening.

pub const fn sphere(radius: f64) -> Self

Create a sphere (flattening = 0).

pub fn b(&self) -> f64

Semi-minor axis (polar radius) in meters.

pub fn e2(&self) -> f64

First eccentricity squared: e² = 2f - f².

pub fn e(&self) -> f64

First eccentricity.

pub fn n(&self) -> f64

Third flattening: n = f / (2 - f) = (a - b) / (a + b).

pub fn ep2(&self) -> f64

Second eccentricity squared: e’² = e² / (1 - e²).

pub fn n_radius(&self, phi: f64) -> f64

Radius of curvature in the prime vertical at latitude phi (radians).

pub fn m_radius(&self, phi: f64) -> f64

Radius of curvature in the meridian at latitude phi (radians).

Trait Implementations

impl Clone for Ellipsoid

fn clone(&self) -> Ellipsoid

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Ellipsoid

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for Ellipsoid