雖然有許多史料證明今日社子地區與「麻少翁社」關係密切，但是就史料分析或文獻記載，在乾隆年間古地圖有「大浪泵洲」的出現，代表著無法否認大浪泵社，對昔日社子地區的部分土地所有權。 而兩社之間並無割讓或買賣的史料記載，連民間鄉野傳說都未曾聽聞，換言之若想證明在平埔族時代，社子沙洲是何者的屬地，必須透過地理學的解讀，才有辦法解決此一問題，因為此地為地形易改變的老年期地形。 在日後漢人的土地開發共業契約中，也出現少有的十年重新換地抓鬮抽籤，分組補給流失的土地，唯有透過史料記載、土地契約、古地圖分析，歷史與地理雙管齊下，才可以了解契約內文中，特有的處理模式，是為了適應此地特殊地理環境的智慧。

She-Zi, the flood bar area in Taipei City, is middle bar between Tamsui River and Keelung River. Most of past academic researches on the land ownership of She-Zi believe it belonged to MaoShaoWeng Village (one of Ketagalan tribes in Taiwan Pingpu ethic groups) in the past. However, we would find the location of She-Zi in the old map also has been called “Lung-Tong-Zhou”. Obviously, Pourompon Village, another one of Ketagalan tribes in the south Taipei, also owned part of She-Zi area. Utilizing old maps, antique contract documents and local toponym research, this paper adopts methods of historical and geographical research to analyze which Village owns early land ownership of She-Zi sandbank.