Since 1921, Metric system has been compulsory in Haiti.
[1] Older units before the Metric system were British, old French, and Spanish.
One toise was 1.9488 m and one anne was 1.188 m, according to the legal equivalents during the transition period to metric system.
[1][2] One carreau was equal to 1292.3 square meters according to the legal equivalents during the transition period to metric system.
Some units and their equivalents according to the transition period, are given below:[1][2] 1 baril = 0.1 m3 1 corde = 3.84 m3 1 toise = 8 m3.