In 1625, the first Dutch governor sent three expeditions around the island by sea, based on which a map was sketched out. This "Map of Peikang," on loan from the Netherlands National Archives in The Hague, was the first map ever to depict a yam-shaped Taiwan, thereby correcting the depiction of Taiwan as an archipelago in previous Portuguese and Spanish maps.
一六二五年，荷蘭首任台灣總督宋克，派人搭船三次環繞台灣島後，實測繪出一幅地圖，這幅來自荷蘭海牙國家檔案館的「北港圖」，可是全世界第一幅將台灣畫成蕃薯形的古地圖，修正了過去葡萄牙與西班牙將台灣畫成三座島嶼或多座島嶼的錯誤。