JarCastinggoogle-polyline
Encodes and decodes Google's polyline format
Install via npm
$ npm install --save google-polyline
Usage
var polyline = require( 'google-polyline' )
polyline.encode([
[ 38.5, -120.2 ],
[ 40.7, -120.95 ],
[ 43.252, -126.453 ]
])
> '_p~iF~ps|U_ulLnnqC_mqNvxq`@'
polyline.decode( '_p~iF~ps|U_ulLnnqC_mqNvxq`@' )
> [
[ 38.5, -120.2 ],
[ 40.7, -120.95 ],
[ 43.252, -126.453 ]
]
Benchmarks
$ npm run benchmark
# decode: 3 points ⨉ 100000
ok ~21 ms (0 s + 21199187 ns)
# decode: ~350 points ⨉ 100000
ok ~741 ms (0 s + 740819246 ns)
# encode: 3 points ⨉ 100000
ok ~221 ms (0 s + 221480259 ns)
# encode: ~350 points ⨉ 100000
ok ~2.4 s (2 s + 403294668 ns)