Struct SinusoidalProjection 

pub struct SinusoidalProjection { /* private fields */ }

Sinusoidal (Sanson-Flamsteed)

Classification: Pseudocylindrical

Available forms: Forward and inverse, spherical and ellipsoidal

Defined area: Global

Alias: sinu

Domain: 2D

Input type: Geodetic coordinates

Output type: Projected coordinates

Projection String

+proj=sinu

Parameters

All parameters are optional.

• +lon_0=<value>: Central meridian.
• +R=<value>: Radius of the sphere or semi-major axis of the ellipsoid.
• +x_0=<value>: False easting.
• +y_0=<value>: False northing.

Mathematical Definition

MacBryde and Thomas developed generalized formulas for several of the pseudocylindricals with sinusoidal meridians. The formulas describing the Sinusoidal projection are:

Forward projection: $$x = C\lambda(m+cos\theta) / ( m + 1)$$ $$y = C\theta$$

Inverse projection: $$\lambda = x \cdot \frac{m + 1}{C \cdot (m + \cos(y / C))}$$ $$\theta = y / C$$

Where: $$C = \sqrt { (m + 1 ) / n }$$

Further Reading

• Wikipedia

Trait Implementations

impl Clone for SinusoidalProjection

fn clone(&self) -> SinusoidalProjection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CoordinateStep for SinusoidalProjection

fn new(proj: Rc<RefCell<Proj>>) -> Self

Create a new Converter

fn forward<P: TransformCoordinates>(&self, p: &mut P)

forward conversion

fn inverse<P: TransformCoordinates>(&self, p: &mut P)

inverse conversion

impl Debug for SinusoidalProjection

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

Formats the value using the given formatter.

impl PartialEq for SinusoidalProjection

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ProjectCoordinates for SinusoidalProjection

fn code(&self) -> i64

ESPG code for this projection

fn name(&self) -> &'static str

Projection name

fn names() -> &'static [&'static str]

Returns the list of canonical names for this projection. This is an associated function, similar to a static method.

fn datum_type() -> u8

get the datum type. Defaults to no datum

impl StructuralPartialEq for SinusoidalProjection