近年來文化遺址的保存工作逐漸的獲得重視，對古蹟保存而言，除人為破壞外，自然風化、地震、颱風等自然災害亦對其具有相當大的威脅，然而這些災害的來臨一般都是無法預測，因此以最有效且迅速的方式記錄國內文化遺址實為重要。
　　目前攝影測量技術已達成熟階段，本技術相對於其他技術可廣泛地記錄被測物資訊，包含整體建物的座標記錄及色彩分佈，因此本研究嘗試以攝影測量方法進行古蹟記錄、3D 模型建構之研究。另外以透地雷達進行古蹟內部資訊的探測。
　　本研究以台灣府城垣小東門段為研究對象，對城牆進行透地雷達探測和攝影測量的3D模型建立。利用攝影測量軟體PI-3000所建立出的3D模型，其精度與現地量測結果誤差-1.29%，結果顯示利用攝影測量建立古蹟的3D 模型是可行的，無論外觀或比例方面都很接近實際物體。透地雷達的成果顯示，北二段三合土牆厚度在0.8m~1m之間，北一段三合土牆厚則在1.2m～1.3m之間。北二段位於牆面底下30cm處有施工交界面或是孔洞，北一段內部則有磚石聚集，且透過3D雷達影像圖的判識，可以判識出植生生長範圍與磚石分佈範圍。
　　最後將透地雷達影像圖和攝影測量所建構的3D模型進行數位典藏的工作，建立一個典藏平台，以供後人使用比對。

Around the world, preserving the monuments has been taken seriously recently. Because the solidity of the monuments was threatened by the destruction of human and the destructive power coming from natural disasters such as the weathering, earthquakes, and typhoons which are occurred suddenly and unpredictable. Hence, looking for a way to record the monuments under such dangers effectively and rapidly is an essential issue.
Nowadays, Photogrammetry has become more and more popular in recording the information of the object, including the texture and coordinates of each part of the subject. Therefore, this study tries to create the 3D model of the chosen monument and record its exterior in detail by Photogrammetry. Meanwhile, Ground Penetrating Radar (GPR) is also led into the study to provide the inner information of the monument for the records.
This study takes the Ruins of Tainan lesser east wall as the studying subject, and applying Photogrammetry and GPR to investigate and record the external and inherent data of this historical structure. After a series of procedures, the 3D model of the studying architecture can be created by the Photogrammetry software, PI-3000, and the 3D model has the average accuracy of -1.29% compared with the measurement in situ. Because the outline and the scale of the 3D model simulating the structure are extremely similar to the real one particularly, creating an accurate 3D model of a monument through Photogrammetry is proved.
In the meanwhile, the investigation result of GPR shows that the thickness of the city wall in the section of north two varies from 0.8m to l m, and in the section of north one the thickness of the city wall is in the range from 1.2m to 1.3m. In addition, the wall in the north two section has either an interface of the construction or the voids in the depth 30cm under the surface of the city wall. And some parts of the wall in the north one section aggregate the bricks. Moreover, the distributions of the vegetable and the bricks in the walls can be discriminated by the 3D radar image composed of several linear radar images.
In the conclusions, this paper establishes the Digital Archives Database of the Ruins of Tainan lesser east wall by combining the surface information coming from the 3D model simulated by Photogrammetry with the inherent data obtained by GPR. The Digital Archives Database will be an open platform for the interests in the internet.

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