Trait geoarrow2::algorithm::geo::simplify_vw::SimplifyVw

source · 
pub trait SimplifyVw {
    // Required method
    fn simplify_vw(&self, epsilon: &f64) -> Self;
}
Expand description

Simplifies a geometry.

Polygons are simplified by running the algorithm on all their constituent rings. This may result in invalid Polygons, and has no guarantee of preserving topology. Multi* objects are simplified by simplifying all their constituent geometries individually.

An epsilon less than or equal to zero will return an unaltered version of the geometry.

Required Methods§

source

fn simplify_vw(&self, epsilon: &f64) -> Self

Returns the simplified representation of a geometry, using the Visvalingam-Whyatt algorithm

See here for a graphical explanation

Examples
use geoarrow2::algorithm::geo::SimplifyVw;
use geoarrow2::array::LineStringArray;
use geoarrow2::trait_::GeoArrayAccessor;
use geo::line_string;

let line_string = line_string![
    (x: 5.0, y: 2.0),
    (x: 3.0, y: 8.0),
    (x: 6.0, y: 20.0),
    (x: 7.0, y: 25.0),
    (x: 10.0, y: 10.0),
];
let line_string_array: LineStringArray<i32> = vec![line_string].into();

let simplified_array = line_string_array.simplify_vw(&30.0);

let expected = line_string![
    (x: 5.0, y: 2.0),
    (x: 7.0, y: 25.0),
    (x: 10.0, y: 10.0),
];

assert_eq!(expected, simplified_array.value_as_geo(0))

Object Safety§

This trait is not object safe.

Implementors§