1. 五万分一樺太空中寫眞測量要圖 惠須取 -- 1:50,000 Karafuto kūchū shashin sokuryō yōzu Esutoru, Maps Index Datasets Stanford University Public content 2023. Stanford Geospatial Center. This polygon shapefile is an index to the map series, '五万分一樺太空中寫眞測量要圖 惠須取 -- 1:50,000 Karafuto kūchū shashin sokuryō yōzu Esutoru.' This map series... Stanford Digital Repository.