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Trait proj::Transform

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pub trait Transform<T> {
    type Output;
    fn transform(&mut self, proj: &Proj) -> Result<(), ProjError>;

    fn transformed(&self, proj: &Proj) -> Result<Self::Output, ProjError>;

    fn transform_crs_to_crs(
        &mut self, 
        source_crs: &str, 
        target_crs: &str
    ) -> Result<(), TransformError> { ... }

    fn transformed_crs_to_crs(
        &self, 
        source_crs: &str, 
        target_crs: &str
    ) -> Result<Self::Output, TransformError> { ... }
}
Expand description

Transform a geometry using PROJ.

Associated Types

Required methods

Transform a Geometry by mutating it in place.

Examples

Transform a geometry using a PROJ string definition:

use geo_types;
use proj::{Proj, Transform};

let mut point = geo_types::point!(x: -36.508f32, y: -54.2815f32);
let proj = Proj::new("+proj=axisswap +order=2,1,3,4").expect("invalid proj string");
 point.transform(&proj);

assert_relative_eq!(
    point,
    geo_types::point!(x: -54.2815f32, y: -36.508f32)
);

Immutable flavor of Transform::transform, which allocates a new geometry.

Examples

Transform a geometry using a PROJ string definition:

use geo_types;
use proj::{Proj, Transform};

let point = geo_types::point!(x: -36.508f32, y: -54.2815f32);
let proj = Proj::new("+proj=axisswap +order=2,1,3,4").expect("invalid proj string");

assert_relative_eq!(
    point.transformed(&proj).unwrap(),
    geo_types::point!(x: -54.2815f32, y: -36.508f32)
);

// original `point` is untouched
assert_relative_eq!(
    point,
    geo_types::point!(x: -36.508f32, y: -54.2815f32)
);

Provided methods

Transform a geometry from one CRS to another CRS by modifying it in place.

Examples
use proj::Transform;
use geo_types::{point, Point};

let mut point: Point<f32> = point!(x: -36.508f32, y: -54.2815f32);
point.transform_crs_to_crs("EPSG:4326", "EPSG:3857").unwrap();

assert_relative_eq!(point, point!(x: -4064052.0f32, y: -7223650.5f32));

Immutable flavor of Transform::transform_crs_to_crs, which allocates a new geometry.

Examples
use proj::Transform;
use geo_types::{point, Point};

let mut point: Point<f32> = point!(x: -36.508f32, y: -54.2815f32);

assert_relative_eq!(
    point.transformed_crs_to_crs("EPSG:4326", "EPSG:3857").unwrap(),
    point!(x: -4064052.0f32, y: -7223650.5f32)
);

Implementations on Foreign Types

Implementors