There are conflicting accounts as to who were Hayden's topographers or map makers. These cities were built on the basis of master plans drawn up by Russian topographers. Another mixed party on horseback of U.S. Army topographers, hunters, scouts, etc. The crew included carpenters, cooks, herders, laborers, teamsters, and topographers. Among his uncles were Christian Sommerfeldt and Ole Hannibal Sommerfeldt, both topographers and county governors. This topographic surface is generally the concern of topographers, hydrographers, and geophysicists. Academy- in 1873 to prepare military engineers, topographers and telegraphers, besides military officers. Topographers and Russian military expeditions have been visiting the Yaghnob Valley since the 1820s. For his thesis, he submitted the "Manual for Topographers" he had written in the Philippines. After 1870, military topographers started to map the mountains, including the Zarafshan Range.