Struct SphericalArea 

pub struct SphericalArea {
    pub radius: f64,
}

Spherical surface area via the trapezoidal spherical-excess rule.

Carries the sphere radius; the result of AreaStrategy::area is in squared radius units (m² for SphericalArea::EARTH, steradians for SphericalArea::UNIT). Default::default() produces SphericalArea::EARTH.

Mirrors boost::geometry::strategy::area::spherical<> from strategies/spherical/area.hpp.

Fields

radius: f64

Sphere radius. The area comes back in these units squared.

Implementations

impl SphericalArea

pub const EARTH: Self

Mean Earth radius in metres, matching Boost’s spherical Earth convention (test/algorithms/area/area_sph_geo.cpp uses per-test radii; 6_371_000 m is the WGS84 mean radius).

pub const UNIT: Self

Unit sphere (radius = 1): the area is then the solid angle (steradians) the polygon subtends (area_sph_geo.cpp:93-106).

Trait Implementations

impl<R> AreaStrategy<R> for SphericalArea

where R: Ring, <R::Point as Point>::Cs: CoordinateSystem + HasAngularUnits, <<R::Point as Point>::Cs as CoordinateSystem>::Family: SameAs<SphericalFamily>, R::Point: Point<Scalar = f64>,

Available on crate feature std only.

type Out = f64

The output scalar type. Typically the geometry’s coordinate scalar. Mirrors area_result<G, Strategies>::type from algorithms/area_result.hpp.

fn area(&self, r: &R) -> f64

Compute the area of g.

impl Clone for SphericalArea

fn clone(&self) -> SphericalArea

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SphericalArea

impl Debug for SphericalArea

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

Formats the value using the given formatter.

impl Default for SphericalArea

fn default() -> Self

Returns the “default value” for a type.