Chidoch'ŏp, [Late Chosŏn i.e. 18th century].

An atlas of Korea. This is an atlas of Chosŏn dynasty, and can be considered a follow-up version of the Tongguk chido (東國地圖), or the Map of Korea, drawn by Chŏng Sang-gi (鄭尚驥, 1678-1752), which has been evaluated as an outstanding accomplishment in the history of cartography. The atlas consists of a complete map of Korea, and eight maps for the provinces. The complete map of Korea is a down-scaled version in smaller size. As to the maps of each province, Kyŏnggi Province and Ch'ungch'ŏng Province were drawn in one piece, while Hamgyŏng Province, larger in area, was rendered in two pieces; northern and southern Hamgyŏng Province. A scale of one hundred ri (里) to one cha (尺) was applied and marked accurately on each of the provincial maps. The introduction of accurate scale to the map was one of the most striking features of Chŏng Sang-gi's Map of Korea. Also noteworthy are the elaborate rendering of the demarcation lines of the northern borders, and the detailed representation of the land and the sea routes, which are also the characteristics of Chŏng Sang-gi's maps. This atlas is presumed to be a copy of one that was produced before 1767 because the town names of Anŭm (安陰) and Sanŭm (山陰) of Kyŏngsang Province are given using earlier names instead of the new names adopted in that year. Other distinguishing features are that Paegyagot (白也串) in the east of Hŭngyang (興陽), Chŏlla Province is represented as an island instead of a promontory, that there is a lake near Sŏgwip'o in Cheju Island, and that the place names are marked on the northern banks across the Amnok River (鴨綠江) and Tuman River (豆滿江), which had previously been left blank. These attest to the fact that this atlas was produced or at least is a copy of one that was produced in between the original version of Chŏng Sang-gi's Map of Korea and its revised version.

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