https://github.com/chanced/rs-polyline-codec

Polyline encoding and decoding.
https://github.com/chanced/rs-polyline-codec

Last synced: about 1 year ago
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Polyline encoding and decoding.

• Host: GitHub
• URL: https://github.com/chanced/rs-polyline-codec
• Owner: chanced
• License: apache-2.0
• Created: 2022-04-10T22:44:36.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2022-04-11T01:13:09.000Z (about 4 years ago)
• Last Synced: 2024-10-06T00:42:37.652Z (over 1 year ago)
• Language: Rust
• Size: 17.6 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
[![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)

![Crates.io](https://img.shields.io/crates/l/polyline-codec?style=flat-square)

# 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