1906
Akisato, Yamane
1937
Sentoksha Bunshin Nihon Chosun Osaka University
1909
Saito, K.
1907
John Murray
1945
Ya Kwang Geographical Institute
1:24k
1927
Great Britain. Ordnance Survey.
1937
Sentoksha Bunshin Nihon Chosun Osaka University
1950
Nagel
1921
China. Whangpoo Conservancy Board
1:10k
1921
China. Whangpoo Conservancy Board
1:10k