Struct Ellipsoid 

pub struct Ellipsoid { /* private fields */ }

Reference ellipsoid.

Defined by equatorial radius and flattening; polar radius and eccentricities are derived. Common chart ellipsoids are provided; others via Ellipsoid::new.

Implementations

impl Ellipsoid

pub const WGS84: Self

WGS 84, the GNSS reference ellipsoid.

pub const GRS80: Self

GRS 80 (ITRF and most national datums); differs from WGS 84 by 0.1 mm at the pole.

pub const INTERNATIONAL_1924: Self

International 1924 (Hayford): ED50 and many older charts.

pub const CLARKE_1866: Self

Clarke 1866: NAD27.

Defined by both axes; inverse flattening derived as a / (a − b).

pub const AIRY_1830: Self

Airy 1830: OSGB36.

pub const KRASSOWSKY_1940: Self

Krassowsky 1940: Pulkovo 1942, charts of the former USSR.

pub const BESSEL_1841: Self

Bessel 1841: Tokyo datum, DHDN.

pub const AUSTRALIAN_NATIONAL: Self

Australian National Spheroid: AGD66; same figure as GRS 1967 Modified (SAD69).

pub fn new(semi_major_axis: Distance, inverse_flattening: f64) -> Result<Self>

Ellipsoid from equatorial radius and inverse flattening.

Errors

KernelError::OutOfRange for a non-positive radius or an inverse flattening below 1 (f64::INFINITY, a sphere, is accepted).

pub fn semi_major_axis(&self) -> Distance

Equatorial radius a.

pub fn semi_minor_axis(&self) -> Distance

Polar radius b = a (1 − f).

pub fn flattening(&self) -> f64

Flattening f = (a − b) / a.

pub const fn inverse_flattening(&self) -> f64

Inverse flattening 1 / f.

pub fn first_eccentricity_squared(&self) -> f64

First eccentricity squared e² = 2f − f².

Trait Implementations

impl Clone for Ellipsoid

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Ellipsoid

impl Debug for Ellipsoid

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

Formats the value using the given formatter.

impl PartialEq for Ellipsoid

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Ellipsoid