[![crates.io](https://img.shields.io/crates/v/polyline-codec?style=flat-square)](https://crates.io/crates/polyline-codec) [![docs.rs](https://img.shields.io/docsrs/polyline-codec?style=flat-square)](https://docs.rs/polyline-codec)
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# Rust port of Google Maps Polyline Encoding

## Description

Encode and decode polyines in Rust using this package.

Polyline encoding is a lossy compression algorithm that allows you to store a series of coordinates as a single string. Point coordinates are encoded using signed values.

Read more at https://developers.google.com/maps/documentation/utilities/polylinealgorithm.

## Note

I have no affiliation with Google or Google Maps. This package was ported from https://github.com/googlemaps/js-polyline-codec.

## Example

```rust
    use polyline_codec::LatLng;
    let encoded = "_p~iF~ps|U_ulLnnqC_mqNvxq`@";
    assert_eq!(
        polyline_codec::decode(encoded, 5).unwrap(),
        vec![
            LatLng(38.5, -120.2,),
            LatLng(40.7, -120.95,),
            LatLng(43.252, -126.453,),
        ]
    );

    let path = &[(38.5, -120.2), (40.7, -120.95), (43.252, -126.453)];
    assert_eq!(
        polyline_codec::encode(path, 5).unwrap(),
        "_p~iF~ps|U_ulLnnqC_mqNvxq`@",
    );
```

## License

MIT OR Apache v2.0