Thursday, 3 December 2020

Survey of Bangladesh


The survey of Bangladesh is the authority of the national map of Bangladesh.  The agency operates under the Ministry of Defense and is headed by the Surveyor General of Bangladesh . According to the English alphabet,Survey of Bangladesh is called SOB. 


The Bangladesh Survey was started on 1 January 18 as Undivided India and conducted survey and mapping activities till 1947. After the subcontinent division on 14 August 1947, it started its new role as a survey of the organization in Pakistan . There was a field party, 1 drawing office, 1 photographic office ( regional office for East Pakistan ) and a geodetic department.

Topographic maps of Bengal were made in the last quarter of the eighteenth century, covering the whole of Bangladesh on a scale of 1: 50,000.

Duties and responsibilities 

SOB is entitled to all aerial photographs and other topographic maps of Bangladesh. They conduct periodic geodetic , topographic and aerial surveys and keep records of basic geodetic and leveling networks. Topo Maps have been prepared, updated and verified by ground survey. SOB's regular responsibilities include modifying and upgrading topographic base maps above the 1: 50,000 scale.

Aerial photographs of Bangladesh are used in accordance with the 'Rules on Classification, Preservation and Issue of Aerial Photographs' issued by the Government of the People's Republic of Bangladesh, Ministry of Defense. It is divided into two categories: 'classified photographs' and 'public photographs'. Aerial photographs, including sensitive sites, are classified as 'classified' and those that do not contain sensitive information are called 'public'.

The SOB is also responsible for the following:

  1. International Boundary Mapping ( Chittagong - Mizo Hill Sector and Bangladesh - Myanmar Region)
  2. Observation means sea level
  3. Cantonment survey
  4. Project mapping; Mapping services of various ministries, departments and agencies; Biographical photograph processing and preservation
  5. Production of maps in different scales as per the demand of different departments

Updating maps is a regular process and is done once every five to seven years. SOB is currently digitally updating the base map of Bangladesh. SOB publishes all the maps from its own offset printing press and the products are available at the sales center at the SOB campus at Tejgaon Industrial Area, Dhaka-1208.

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