Package lat-long

Simple types for representing latitude and longitude coordinates.

Examples

Basic construction and display.

use lat_long::{Angle, Coordinate, Latitude, Longitude};

let lat = Latitude::new(48, 51, 29.6).expect("valid latitude");
let lon = Longitude::new(2, 21, 7.6).expect("valid longitude");
let paris = Coordinate::new(lat, lon);

// Decimal-degree display (default)
println!("{paris}");   // => 48.858222, 2.218778
// Degrees–minutes–seconds display (alternate flag)
println!("{paris:#}"); // => 48° 51' 29.6" N, 2° 21' 7.6" E

Parsing a coordinate from a string.

use lat_long::{parse::{self, Parsed}, Coordinate};

if let Ok(Parsed::Coordinate(london)) = parse::parse_str("51.522, -0.127") {
    println!("{london}"); // => 51.522, -0.127
}

Construct URL (URN) from coordinate.

// Convert to URL, requires `url` feature flag
let url = url::Url::from(paris);
println!("{url}"); // => geo:48.858222,2.218778

Construcxt a JSON value according to the GeoJSON spec.

// Convert to JSON, requires `geojson` feature flag
let json = serde_json::Value::from(paris);
println!("{json}"); // => { "type": "Point", "coordinates": [48.858222,2.218778] }

License(s)

The contents of this repository are made available under the following licenses:

Apache-2.0

Copyright 2025 Simon Johnston <johnstonskj@gmail.com>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

See the enclosed file LICENSE-Apache.

MIT

Copyright 2025 Simon Johnston <johnstonskj@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

See the enclosed file LICENSE-MIT.