Semen studied at the Azov Province Survey Expedition. One of his first military posts was as a surveyor in Tavrida province (with the rank of ensign). He participated in the storming of Anapa, and in the suppression of the "confederates" in...
Studied at the Academy of Arts and in the Shliakhta Infantry Corps. Worked in the Geography Department of the Academcy of Sciences 1780-1785 and then in the Geography Department of the Military-Topographical Depo and the Ministry of Education. He tau...