 The SOB began as the "Bengal Survey" on 1 January 1767 in undivided India and conducted surveying and mapping activities until 1947.After the partition of the subcontinent on 14 August 1947, the organization started its new role as Survey of Pakistan and established a regional office at Dhaka.The regional office initially had 2 directorates, 2 field parties, 1 drawing office, 1 photogrammetric office (regional office for East Pakistan) and a geodetic department.