| 英文摘要 |
The advancement of surveying technology has made field surveying simpler. In recent years, pioneers have been dedicated to using LiDAR technology in cadastral surveying. They have introduced the concept of three-dimensional cadastre, or four-dimension by incorporating time. They have brought about a new era in cadastral surveying. This study focuses on ''Construction and Overlaying of Cadastral Map, Topographic Map, and Urban Planning Map.'' Point clouds of LiDAR combined with point clouds produced by dense matching from UAV photography. The point clouds from both methods were extracted into topo points for map overlays and analysis. The objective was to meet the requirements of graphical area cadastral surveying, simplify surveying works, and provide original data for surveyors. The results of LiDAR technology align with cadastral surveying accuracy, and it is more convenient than theodolite surveying. The accuracy of the point clouds, which were produced by aerial images, meets the requirements of graphical area cadastral surveying. This method can assist in capturing points behind the house. However, if the point cloud is only produced by vertical aerial photographs, it has a lower point density in the vertical direction. And it causes many feature points can’t be measured or incorrectly interpreted. It caused the results to fall short of requirements. It is the direction for further research. |
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