The Survey of Bangladesh (SOB) is the national surveying and mapping agency for Bangladesh. The agency functions under the Ministry of Defence and is headed by the Surveyor General of Bangladesh. The main objectives and responsibilities of SOB are: establishment of trigonometrical and primary geodetic control networks, conduct ground surveys and preparation, revision and updating of maps at various scales, demarcation of international boundary of the country, preparation of geographical and political maps, aerial photography and its control, printing, maintenance and custody of the negatives as well as preparation of topographic maps and other various thematic maps.
