getCenterLatLong method

Future<LatLng> getCenterLatLong(List<LatLng> latLongList)

Function to get center location between two coordinate

Implementation

Future<LatLng> getCenterLatLong(List<LatLng> latLongList) async {
  double pi = math.pi / 180;
  double xpi = 180 / math.pi;
  double x = 0, y = 0, z = 0;

  if (latLongList.length == 1) {
    return latLongList[0];
  }

  for (int i = 0; i < latLongList.length; i++) {
    double latitude = latLongList[i].latitude * pi;
    double longitude = latLongList[i].longitude * pi;
    double c1 = math.cos(latitude);
    x = x + c1 * math.cos(longitude);
    y = y + c1 * math.sin(longitude);
    z = z + math.sin(latitude);
  }

  int total = latLongList.length;
  x = x / total;
  y = y / total;
  z = z / total;

  double centralLongitude = math.atan2(y, x);
  double centralSquareRoot = math.sqrt(x * x + y * y);
  double centralLatitude = math.atan2(z, centralSquareRoot);

  return LatLng(centralLatitude * xpi, centralLongitude * xpi);
}