Surface surveys and soil studies indicate that the site is larger than the Dayuan Primary School campus. In fact, it covers about five hectares, about half the size of the Chiang Kai-shek Memorial Plaza (also known as the Taiwan Democracy Memorial Plaza).
根據這次地面調查與土質探勘結果，即發現遺址範圍大過整個大園國小，超過 5 公頃，相當於半個中正紀念堂（台灣民主紀念廣場）。