However, three sheets of this map set-Keelung, Kaohsiung and Penghu-were designated as military strongholds during the Japanese occupation and as such were kept from public view. Generations of geographers after the war were unable to locate them.
然而，這套圖的基隆、高雄、澎湖 3 個部分，由於在日據時期被列為軍事要塞、不准公開而長期下落不明，戰後幾代地理學者也遍尋不著。