LatLong - Lightweight library for common latitude and longitude calculation
This library supports both, the "Haversine" and the "Vincenty" algorithm.
"Haversine" is a bit faster but "Vincenty" is far more accurate!
Catmull-Rom algorithm is used for smoothing out the path.
Basic usage
Distance
const distance = new Distance();
// km = 423
const km = distance.as(LengthUnit.Kilometer,
new LatLng(52.518611,13.408056),new LatLng(51.519475,7.46694444));
// meter = 422591.551
const meter = distance.distance(
new LatLng(52.518611,13.408056),
new LatLng(51.519475,7.46694444)
);
Offset
const distance = new Distance();
const distanceInMeter = Math.round(EARTH_RADIUS * Math.PI / 4));
const p1 = new LatLng(0.0, 0.0);
const p2 = distance.offset(p1, distanceInMeter, 180);
// LatLng(latitude:-45.219848, longitude:0.0)
console.log(p2.round());
// 45° 13' 11.45" S, 0° 0' 0.00" O
console.log(p2.toSexagesimal());
Path smoothing
// zigzag is a list of coordinates
const path = new Path.from(zigzag);
// Result is below
const steps = path.equalize(8,smoothPath: true);
For more - check out my tests