code: function (latitude) {
                  return Math.log(Math.tan(Math.PI / 4 + (latitude * Angle.DEGREES_TO_RADIANS) / 2)) / Math.PI;
              }
docs: Calculates the Gudermannian inverse used to unproject Mercator projections.
  @param {Number} latitude The latitude in degrees.
  @returns {Number} The Gudermannian inverse for the specified latitude.