Maps of Sikkim produced by Survey of India in 1923, 1933 and 1937 show Gipmochi as the tri-junction point, However, a map from 1910 that shows the details of the Chumbi Valley and Bhutan gives Batang La as the tri-junction point. Indian sources state that the Survey of India map of 1956 and other maps since then by both Indian and Bhutanese sources have depicted the tri-junction near Batang La.