4138 1 WAY FORWARD: Cartographic distortions of the past, resulting in differing perceptions, can be resolved using advanced techniques available now. PTI Lt Gen AS Bahia (retd) Ex-Director General, Military Operations INDIA has undelineated and undemarcated, thus disputed, borders with some of its neighbours. With China, the entire length of the border from Ladakh to Arunachal Pradesh, with the exception of 220 km in Sikkim (delimited by the Convention of March 1890, signed between the British regime and China at Calcutta), is not demarcated. A somewhat ambiguous Line of Actual Control (LAC) works as the de facto alignment. This has led to periodic border skirmishes, apart from a major war in 1962 and the one recently averted.