docs: public double calcAzimuth(double lat1, double lon1, double lat2, double lon2) {
          double orientation = Math.PI / 2 - calcOrientation(lat1, lon1, lat2, lon2);
          if (orientation < 0)
              orientation += 2 * Math.PI;
  
          return Math.toDegrees(Helper.round4(orientation)) % 360;
      }