Great Britain. War Office. General Staff. Geographical Section. G.S.G.S. no. 2097. North Decimal Degree 41.4167. South Decimal Degree 40.5833. East Decimal Degree 29.3333. West Decimal Degree 27.6667. Alternate title: Turkey: Constantinople. Relief shown by 100 feet contour interval and spot heights. Glossary in Turkish transliteration and English. Map is filed with "The Balkans, scale 1:250,000. Series G.S.G.S. no. 2097." It is a set of 23 sheets.