Boundaries
National Land Commission Secretariat
50k_Bhutan Category: Open
The topographic map on a scale of 1:50,000 was based on vertical aerial photographs of the 1950s and field verification in the 1960s. The Survey of India published these topographic maps of Bhutan. Altogether 78 topographic map sheets cover the whole of Bhutan. Later 22 toposheet in 1: 50,000 was completed by June 2001.
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Department of Geology and Mines
Geologic Map of Bhutan Category: Open
Featured in the Journal of Maps in 2011, this geological map presents a newly compiled 1:500,000-scale representation of Bhutan, along with neighboring areas in India and southern Tibet. Assembled from the most recent and comprehensive mapping datasets available at the time, it offers a significantly enhanced level of structural detail compared to earlier geological maps of the region. Bhutan’s geology is broadly categorized into four major lithological units, arranged from south to north: the Siwalik Group, the Lesser Himalayan Zone, the Greater Himalayan Zone, and the Tethyan Himalayan Zone. Alongside this, the antiformal tectonic window exposing Lesser Himalayan units with the Greater Himalaya, and the synformal klippe of Tethyan Himalayan units—both regarded as characteristic structural features of the Himalayas are also mapped in the Bhutanese Himalaya.