The Impact of Historic Underground Buildings on Land Use

During the Second Taiwan Strait Crisis from 1958 to 1979, a large number of underground tunnels were dug to meet the needs of the war on the island of Kinmen, which is located between Taiwan and China, to provide defense, refuge, and transportation of materials. However, the tunnels caused many problems during the post-war development of the island. For example, there are problems of property ownership between underground and aboveground objects, and difficulties in infrastructure construction. Therefore, it is necessary to clarify the relationship between assets of historical significance and value and aboveground objects to ensure that cultural assets are adequately protected and properly planned. In this study, the 3D point cloud model of underground tunnels and the ground surface will be integrated by ground-based lidar technology and analyzed by overlapping with cadastral maps and urban planning maps to obtain accurate spatial relationships. The point cloud data measurements can be used to obtain the location and depth of the tunnels, which can be used as a reference for land disputes, urban planning, engineering design, and preservation or restoration plans for cultural assets.