Korean Usando-Ulluengdo antique map list
From 15Century to 1694
Most of Full Peninsula map of Korea and Kanwon-do（江原道） area maps, Usando（于山島） located on West, Northwest or Southwest of Ulleungdo and east of Samchok（三陟） and Uljin（蔚珍）and Pyonghae（平海）. It means, Usando locates between Korean peninsul and Ulluengdo. It can assumed that there are poor Geography information of Ulleungdo or they recognized one island twin names coz Usan is just a another old name of Ulluengdo written in Samguk-sigi and other Korean records..
From 1694 to 20Century
Usano is drawn on northeast of Ulleungdo mostly with single narrow-wide shapes island. After Anh's（安龍福） incident and territorial dispute between Joseon dynasty（朝鮮王朝） and Japan's Tsushima Office（対馬藩） about Ulleungdo（鬱陵島）(Called "Takeshima（竹嶋）" by Japan, different island with today's Takeshima (Liacnourt Rocks or dokdo, and Matsushima on Edo's Japan) , Joseon dynasty（朝鮮王朝） starts detailed Ulluengo inspection and make Detaild Ulleungdo maps by thier Ulluengdo inspector s(捜討官）.
Inspector's detailed Map had quoted many maps after that and it refrects the new desigon of Full=Korean peninsula map and Kanwondo-Maps.
Those detailed maps had developped around 1750's, Korean use measurement for each maps and Usando had drawn almost 2~12km norheast of Ulleungdo with single narrow-wide shape.
On the other hand, there are some maps Usando drawn west of Ulluengdo, considered to be quoted old map recognization before 1694.
Around 1850-1860's famous Map producer Kim Jon-ho（金正浩） and 1883's Ulleungdo inspector Lee-Guwon李奎遠 they considered Usando is another nam of Ulluengdo so they didn't draw Usando.
After that, around 1890's, orthdox Ulleungdo design, most prominent adjunctive island of Usando-Jukdo(Boussole Rock) and small southern five rocks revival on Koran maps.
After 1905
Mostly they depends on Japan's modern maps. But some Korean who master modern map makings they produced some maps.
After 1950's
Korean invaded Takeshima(Liacnourt Rocks, or Dokdo) and they started illegal occupation and describes Takeshima(Liacnourt Rocks) as "Dokdo" on Koran maps.
テーマ別にも分けてあるので、参照されたし。
・1694年以降の朝鮮王朝の鬱陵島捜討官の製作した鬱陵島詳細図
・円型の鬱陵島圖形（+江原道圖）
・お結び型の于山が書かれた地図。（藪太郎氏） 保坂への反論（薮太郎氏のWebsiteに飛びます）
是よりも大幅に強化して有ると思います。