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use num_traits::FromPrimitive;
use crate::{CoordFloat, Line, LineString, MultiLineString};
use crate::{Haversine, Length};
#[deprecated(
since = "0.29.0",
note = "Please use the `Haversine.length(&line)` via the `Length` trait instead."
)]
/// Determine the length of a geometry using the [haversine formula].
///
/// [haversine formula]: https://en.wikipedia.org/wiki/Haversine_formula
///
/// *Note*: this implementation uses a mean earth radius of 6371.0088 km, based on the [recommendation of
/// the IUGG](ftp://athena.fsv.cvut.cz/ZFG/grs80-Moritz.pdf)
pub trait HaversineLength<T, RHS = Self> {
/// Determine the length of a geometry using the [haversine formula].
///
/// # Units
///
/// - return value: meters
///
/// # Examples
///
/// ```
/// use geo::prelude::*;
/// use geo::LineString;
///
/// let linestring = LineString::<f64>::from(vec![
/// // New York City
/// (-74.006, 40.7128),
/// // London
/// (-0.1278, 51.5074),
/// ]);
///
/// let length = linestring.haversine_length();
///
/// assert_eq!(
/// 5_570_230., // meters
/// length.round()
/// );
/// ```
///
/// [haversine formula]: https://en.wikipedia.org/wiki/Haversine_formula
fn haversine_length(&self) -> T;
}
#[allow(deprecated)]
impl<T> HaversineLength<T> for Line<T>
where
T: CoordFloat + FromPrimitive,
{
fn haversine_length(&self) -> T {
Haversine.length(self)
}
}
#[allow(deprecated)]
impl<T> HaversineLength<T> for LineString<T>
where
T: CoordFloat + FromPrimitive,
{
fn haversine_length(&self) -> T {
Haversine.length(self)
}
}
#[allow(deprecated)]
impl<T> HaversineLength<T> for MultiLineString<T>
where
T: CoordFloat + FromPrimitive,
{
fn haversine_length(&self) -> T {
Haversine.length(self)
}
}