proj4rs 0.1.9

Rust adaptation of Proj4
Documentation 
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//!
//! Unit tests
//!
use env_logger;
use std::sync::Once;

static INIT: Once = Once::new();

pub fn setup() {
    // Init setup
    INIT.call_once(|| {
        env_logger::init();
    });
}

pub(crate) mod utils {
    use crate::math::adjlon;
    use crate::proj::{Proj, ProjData};
    use approx::assert_abs_diff_eq;

    pub(crate) fn scale(d: &ProjData, xyz: (f64, f64, f64)) -> (f64, f64, f64) {
        (xyz.0 * d.ellps.a + d.x0, xyz.1 * d.ellps.a + d.y0, xyz.2)
    }

    pub(crate) fn descale(d: &ProjData, xyz: (f64, f64, f64)) -> (f64, f64, f64) {
        (
            (xyz.0 - d.x0) * d.ellps.ra,
            (xyz.1 - d.y0) * d.ellps.ra,
            xyz.2,
        )
    }

    pub(crate) fn to_deg(lam: f64, phi: f64, z: f64) -> (f64, f64, f64) {
        (lam.to_degrees(), phi.to_degrees(), z)
    }

    pub(crate) fn to_rad(lpz: (f64, f64, f64)) -> (f64, f64, f64) {
        (lpz.0.to_radians(), lpz.1.to_radians(), lpz.2)
    }

    pub(crate) fn test_proj_forward(
        p: &Proj,
        inputs: &[((f64, f64, f64), (f64, f64, f64))],
        prec: f64,
    ) {
        let d = p.data();
        inputs.iter().for_each(|(input, expect)| {
            let (lam, phi, z) = to_rad(*input);
            let out = scale(
                d,
                p.projection()
                    .forward(adjlon(lam - d.lam0), phi, z)
                    .unwrap(),
            );
            println!("{:?}", out);
            assert_abs_diff_eq!(out.0, expect.0, epsilon = prec);
            assert_abs_diff_eq!(out.1, expect.1, epsilon = prec);
            assert_abs_diff_eq!(out.2, expect.2, epsilon = prec);
        })
    }

    pub(crate) fn test_proj_inverse(
        p: &Proj,
        inputs: &[((f64, f64, f64), (f64, f64, f64))],
        prec: f64,
    ) {
        let d = p.data();
        inputs.iter().for_each(|(expect, input)| {
            let (x, y, z) = descale(d, *input);
            let (lam, phi, z) = p.projection().inverse(x, y, z).unwrap();
            let out = to_deg(adjlon(lam + d.lam0), phi, z);
            println!("{:?}", out);
            assert_abs_diff_eq!(out.0, expect.0, epsilon = prec);
            assert_abs_diff_eq!(out.1, expect.1, epsilon = prec);
            assert_abs_diff_eq!(out.2, expect.2, epsilon = prec);
        })
    }
}

use crate::proj::Proj;
use crate::transform::transform;
use approx::assert_abs_diff_eq;

#[test]
fn test_transform_array() {
    let mut data: Vec<(f64, f64, f64)> = (1..=1_000)
        .map(|_| (2.0f64.to_radians(), 1.0f64.to_radians(), 0.0f64))
        .collect();

    let from = Proj::from_proj_string("+proj=latlong +ellps=GRS80").unwrap();
    let to = Proj::from_proj_string("+proj=etmerc +ellps=GRS80").unwrap();

    transform(&from, &to, data.as_mut_slice()).unwrap();

    // Check values
    data.iter().for_each(|(x, y, _)| {
        assert_abs_diff_eq!(*x, 222650.79679758527, epsilon = 1.0e-10);
        assert_abs_diff_eq!(*y, 110642.22941193319, epsilon = 1.0e-10);
    });
}

#[test]
fn test_utm33_grs80() {
    let from = Proj::from_proj_string("+proj=latlong +ellps=GRS80").unwrap();
    let to = Proj::from_proj_string("+proj=utm +ellps=GRS80 +zone=33").unwrap();

    let mut v1 = vec![(
        13.393921852111816_f64.to_radians(),
        52.5200080871582_f64.to_radians(),
        0.0,
    )];

    transform(&from, &to, v1.as_mut_slice()).unwrap();

    assert_abs_diff_eq!(v1[0].0, 391027.67777461524, epsilon = 1.0e-10);
    assert_abs_diff_eq!(v1[0].1, 5820089.724404063, epsilon = 1.0e-10);
}

#[test]
fn test_wgs84_bng_conversion() {
    //crate::nadgrids::catalog::files::

    let from = Proj::from_proj_string("+proj=latlong +datum=WGS84").unwrap();
    let to = Proj::from_proj_string(concat!(
        "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 ",
        "+ellps=airy ", //+nadgrids=OSTN15_NTv2_OSGBtoETRS.gsb",
    ))
    .unwrap();

    let mut v1 = vec![(-4.89328_f64.to_radians(), 51.66311_f64.to_radians(), 0.0)];

    transform(&from, &to, v1.as_mut_slice()).unwrap();

    assert_abs_diff_eq!(v1[0].0, 199925.978901151626, epsilon = 1.0e-8);
    assert_abs_diff_eq!(v1[0].1, 200052.051949012151, epsilon = 1.0e-8);
}

#[test]
#[cfg(feature = "local_tests")]
fn test_wgs84_bng_nadgrid_conversion() {
    use crate::nadgrids::{catalog, files::read_from_file};
    catalog::set_builder(read_from_file);

    let from = Proj::from_proj_string("+proj=latlong +datum=WGS84").unwrap();
    let to = Proj::from_proj_string(concat!(
        "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 ",
        "+ellps=airy +nadgrids=OSTN15/OSTN15_NTv2_OSGBtoETRS.gsb",
    ))
    .unwrap();

    let mut v1 = vec![(-4.89328_f64.to_radians(), 51.66311_f64.to_radians(), 0.0)];

    transform(&from, &to, v1.as_mut_slice()).unwrap();

    eprintln!("{:?}", v1[0]);

    assert_abs_diff_eq!(v1[0].0, 199999.973939543968, epsilon = 1.0e-6);
    assert_abs_diff_eq!(v1[0].1, 200000.366094537778, epsilon = 1.0e-6);
}

#[test]
#[cfg(feature = "local_tests")]
fn test_wgs84_bng_nadgrid_inverse_conversion() {
    use crate::nadgrids::{catalog, files::read_from_file};
    catalog::set_builder(read_from_file);

    let to = Proj::from_proj_string("+proj=latlong +datum=WGS84").unwrap();
    let from = Proj::from_proj_string(concat!(
        "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 ",
        "+ellps=airy +nadgrids=OSTN15/OSTN15_NTv2_OSGBtoETRS.gsb",
    ))
    .unwrap();

    let mut v1 = vec![(199999.973939543968, 200000.366094537778, 0.0)];

    transform(&from, &to, v1.as_mut_slice()).unwrap();

    eprintln!("{:?}", (v1[0].0.to_degrees(), v1[0].1.to_degrees()));

    assert_abs_diff_eq!(v1[0].0, -4.89328_f64.to_radians(), epsilon = 1.0e-10);
    assert_abs_diff_eq!(v1[0].1, 51.66311_f64.to_radians(), epsilon = 1.0e-10);
}

#[test]
#[cfg(feature = "local_tests")]
fn test_wgs84_bng_latlong_nadgrid() {
    use crate::nadgrids::{catalog, files::read_from_file};
    catalog::set_builder(read_from_file);

    let from = Proj::from_proj_string("+proj=latlong +datum=WGS84").unwrap();
    let to = Proj::from_proj_string(concat!(
        "+proj=latlong ",
        "+nadgrids=OSTN15/OSTN15_NTv2_OSGBtoETRS.gsb",
    ))
    .unwrap();

    let mut v1 = vec![(-9.0_f64.to_radians(), 49.0_f64.to_radians(), 0.0)];
    //let mut v1 = vec![(-4.89328_f64.to_radians(), 51.66311_f64.to_radians(), 0.0)];

    transform(&from, &to, v1.as_mut_slice()).unwrap();

    eprintln!("{:?}", (v1[0].0.to_degrees(), v1[0].1.to_degrees()));

    // Compare to output of proj 9
    // echo -9.0 49.0 | cct -z0 -t0 -d 12 +proj=longlat +nadgrids=OSTN15_NTv2_OSGBtoETRS.gsb
    assert_abs_diff_eq!(v1[0].0, -8.999464150263_f64.to_radians(), epsilon = 1.0e-10);
    assert_abs_diff_eq!(v1[0].1, 48.999301262247_f64.to_radians(), epsilon = 1.0e-10);
}


#[test]
#[cfg(feature = "local_tests")]
fn test_epsg27700_bad_point() {
    // From https://github.com/3liz/proj4rs/issues/37
    use crate::nadgrids::{catalog, files::read_from_file};
    catalog::set_builder(read_from_file);

    const EPSG_27700: &str = concat!(
        "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 ",
        "+ellps=airy +nadgrids=OSTN15/OSTN15_NTv2_OSGBtoETRS.gsb",
    );
    
    let epsg_4326 = Proj::from_proj_string("+proj=longlat +datum=WGS84").unwrap();
    let epsg_27700 = Proj::from_proj_string(EPSG_27700).unwrap();

    crate::adaptors::transform_vertex_2d(
        &epsg_4326,
        &epsg_27700,
        (-0.03209530211282055, 0.8866271675445546),
    )
    .unwrap();

    crate::adaptors::transform_vertex_2d(
        &epsg_4326,
        &epsg_27700,
        (-0.0321, 0.8866271675445546),
    )
    .unwrap();

    crate::adaptors::transform_vertex_2d(
        &epsg_4326,
        &epsg_27700,
        (-0.03209530211282055, 0.8866272),
    )
    .unwrap();

}