code: function CHtoWGSlat(y, x) {
  
    // Converts militar to civil and  to unit = 1000km
    // Axiliary values (% Bern)
    const y_aux = (y - 600000) / 1000000;
    const x_aux = (x - 200000) / 1000000;
  
    // Process lat
    let lat = 16.9023892 +
        3.238272 * x_aux -
        0.270978 * Math.pow(y_aux, 2) -
        0.002528 * Math.pow(x_aux, 2) -
        0.0447 * Math.pow(y_aux, 2) * x_aux -
        0.0140 * Math.pow(x_aux, 3);
  
    // Unit 10000" to 1 " and converts seconds to degrees (dec)
    lat = lat * 100 / 36;
  
    return lat;
  
  }
docs: Convert CH y/x to WGS lat