[−][src]Crate polyline
Google Encoded Polyline encoding & decoding in Rust
Polyline is a lossy compression algorithm that allows you to store a series of coordinates as a single string.
Example
use polyline; use geo_types::line_string; let coord = line_string![(x: -120.2, y: 38.5), (x: -120.95, y: 40.7), (x: -126.453, y: 43.252)]; let output = "_p~iF~ps|U_ulLnnqC_mqNvxq`@"; let result = polyline::encode_coordinates(coord, 5).unwrap(); assert_eq!(result, output)
A Note on Coordinate Order
This crate uses Coordinate
and LineString
types from the geo-types
crate, which encodes coordinates
in (x, y)
order. The Polyline algorithm and first-party documentation assumes the opposite coordinate order.
It is thus advisable to pay careful attention to the order of the coordinates you use for encoding and decoding.
Functions
decode_polyline | Decodes a Google Encoded Polyline. |
encode_coordinates | Encodes a Google Encoded Polyline. |