Yi Chung-hwan ( Korean: 이중환; Hanja: 李重煥; 1690–1756) was a Joseon civil servant and geographer. [1] He wrote the classic Taengniji (1751), describing places in Korea in detail, [2] [3] including provinces of Pyeong'an, Hamgyeong, Hwanghae, Gangwon, Gyeongsang, Jeolla, Chungcheong, and Gyeonggi. [1]