Olaf Nikolas Olsen

Olaf Nikolas Olsen was a cartographer and an officer of the Danish army. He taught cartography at the Royal Cadet School and from 1830 on also at the new Army Academy. In 1836 was made a member of the General Staff, and in 1842 he was named head of the topographic department of the staff, with the rank of a Major. In 1848, he was promoted to the rank of colonel.