Ino Yoshinori compared the legends of every settlement related to the origins of ancestors, as well as customs and geographical conditions. Then he boldly deduced that the ancestors of the Ketagalan, an Austronesian group, very likely set their feet on Taiwan the first time at Shen-ao Harbor (also called "Aodi") near Sandiao Cape, and then they migrated toward the west and the south.
伊能嘉矩便藉著各社有關祖先起源的傳說、習俗和地理條件等資料的比對，大膽地推測屬於南島語系的凱達格蘭人祖先，首度踏上台灣的腳印，極可能落在三貂角附近的深澳港（或稱澳底），然後往西、南遷徙。