1 lines is exactly 1/12 inches. In SI units 1 line is 0.00211666... meters.
4 000 meters. A general or metric league of 4 kilometers. Leagues based on the mile are typically smaller at 3 miles, however there are many variations. Used by Jules Verne in 20 000 Leagues Under the Sea. 1 League (metric) = 4 000 meters (SI unit).