function getLambda(y, x) {
    y = (y - 600000)/1000000;
    x = (x - 200000)/1000000;
 
    lambda = 2.6779094;
    lambda = lambda + 4.728982 * y;
    lambda = lambda + 0.791484 * y * x;
    lambda = lambda + 0.1306 * y * Math.pow(x, 2);
    lambda = lambda - 0.0436 * Math.pow(y, 3);
   
    lambda = lambda * 100/36;

   return lambda;
  }
  
  function getRho(y, x) {
    y = (y - 600000)/1000000;
    x = (x - 200000)/1000000;
    
    rho = 16.9023892;
    rho = rho + 3.238272 * x;
    rho = rho - 0.270978 * Math.pow(y, 2);
    rho = rho - 0.002528 * Math.pow(x, 2);
    rho = rho - 0.0447 * Math.pow(y, 2) * x;
    rho = rho - 0.0140 * Math.pow(x, 3);

    rho = rho * 100/36;

   return rho;
  }