Tanganyika 1:50,000 [cartographic material].

Various eds. Topographic map series of Tanzania showing international and provincial boundaries, roads, railways, mosques and populated areas. Relief shown by contours, form lines and spot heights.; Some sheets issued by the Directorate under its earlier name: Directorate of Colonial Surveys as D.C.S. 22. Some sheets issued by General Staff, Geographical Section of the War Office as G.S.G.S. 4789 and others issued by the D. Survey, War Office and Air Ministry. Some sheets have added series designation D.O.S. 422. Title varies slightly.; Each sheet variously includes boundary diagram, grid reference diagram, index to adjoining sheets, reliability diagram and sheet history.; Each sheet is named and numbered individually.; In 1964 Tanganyika merged with Zanzibar and became the jurisdiction of Tanzania. This topographic map series covers the post and pre-merger period. Therefore Tanganyika changed its name to Tanzania which is reflected in the change of title.; The Directorate of Colonial Surveys started a photogrammetric 1:50,000 scale series in 1947. This map series also consists of preliminary plot maps.Tanzania 1:50,000East Africa 1:50,000 (Tanzania