polyline

Polyline encoding and decoding

polyline

A simple google-esque polyline implementation in Javascript. Compatible with nodejs (npm install polyline and the browser (copy src/polyline.js)).

Encodes/decodes into lat/lng coordinate pairs. Use fromGeoJSON() to encode from GeoJSON objects.

npm install polyline
var polyline = require('polyline');
 
// returns an array of lat, lon pairs 
polyline.decode('_p~iF~ps|U_ulLnnqC_mqNvxq`@');
 
// returns a string-encoded polyline 
polyline.encode([[38.5, -120.2], [40.7, -120.95], [43.252, -126.453]]);
 
// returns a string-encoded polyline from a GeoJSON LineString 
polyline.fromGeoJSON({ "type": "Feature",
  "geometry": {
    "type": "LineString",
    "coordinates": example_flipped
  },
  "properties": {}
});

Documentation