void getCenterLatLong(){
    num sumX = 0.0;
    num sumY = 0.0;
    num sumZ = 0.0;

    for (var location in locationList) {
      var lat = degreeToRad(location.lat);
      var lng = degreeToRad(location.long);

      sumX += cos(lat) * cos(lng);
      sumY += cos(lat) * sin(lng);
      sumZ += sin(lat);
    }

    num avgX = sumX / attractionPassModel.data.attractionsData.length;
    num avgY = sumY / attractionPassModel.data.attractionsData.length;
    num avgZ = sumZ / attractionPassModel.data.attractionsData.length;

    var lng = atan2(avgY, avgX);
    var hyp = sqrt(avgX * avgX + avgY * avgY);
    var lat = atan2(avgZ, hyp);

    var centerLat = radToDegree(lat);
    var centerLng = radToDegree(lng);
}


void degreeToRad(degree) {
  return degree * pi / 180;
}

void radToDegree(rad) {
  return rad * 180 / pi;
}