This polygon shapefile is an index to 1:2,000,000 scale maps of East Asia, Australia, titled 'Nihyakumanbun no ichi Taiheiyō shūiki yochizu (kōkūzu) -- [1:2,000,000 Aerial Charts of the Pacific Rim] -- 二百萬分一太平洋周域輿地圖(航空圖).’ This map series was originally produced by the Japanese Land Survey Department of the General Staff Headquarters in 1943. Stanford University Libraries holds a large collection of Japanese military and imperial maps, referred to as gaihōzu, or "maps of outer lands." These maps were produced starting in the early Meiji (1868-1912) era and the end of World War II by the Land Survey Department of the General Staff Headquarters, the former Japanese Army. The Library is in the process of scanning and making available all of the maps in the collection. To create this index, footprints were generated using the fishnet tool, and metadata were supplied for the digitized paper maps by Stanford University Libraries. After the footprints were created, the shapefile was trimmed and labeled according to the sources. This layer provides an index map that can be used to locate individual scanned map sheets. Stanford Geospatial Center. (2016). Nihyakumanbun no ichi Taiheiyō shūiki yochizu, Maps Index. Stanford Digital Repository. Available at: http://purl.stanford.edu/gy090jz0601. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.