distanceTo method

double distanceTo(LocationUpdate other)

Calculates distance in meters to another location using Haversine formula.

Returns the great-circle distance between this location and other.

Implementation

double distanceTo(LocationUpdate other) {
  const earthRadiusMeters = 6371000.0;

  final dLat = _toRadians(other.latitude - latitude);
  final dLon = _toRadians(other.longitude - longitude);

  final a =
      (math.sin(dLat / 2) * math.sin(dLat / 2)) +
      (math.cos(_toRadians(latitude)) *
          math.cos(_toRadians(other.latitude)) *
          math.sin(dLon / 2) *
          math.sin(dLon / 2));

  final c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a));

  return earthRadiusMeters * c;
}