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A platform for research: civil engineering, architecture and urbanism
Extracting Ground Points and Generating Digital Elevation Model (DEM) from Point Clouds from Point Clouds
Digital elevation models (DEM) is essential information for leveling, surveying in building construction. There are many methods for generating DEM. Because of consuming much time and labor, directed methods are replaced by many indirect methods for generating DEM. In this study, DEM is proposed to be generated from point clouds rapidly collected by laser scanning or photogrammetry. Two datasets are used for checking the proposed data processing process. As a result, two ground point cloud areas were extracted. Many ground points in the steepest areas cannot be extracted. For a flat area with less than 10° of slope angle, the results of ground point extraction are good. The surface is divided into many equal grid cells for generating DEM, and the grid cell’s elevation is computed from the point’s elevation inside it. Finally, DEMs are displayed as TINs by creating Delaunay triangle networks.
Extracting Ground Points and Generating Digital Elevation Model (DEM) from Point Clouds from Point Clouds
Digital elevation models (DEM) is essential information for leveling, surveying in building construction. There are many methods for generating DEM. Because of consuming much time and labor, directed methods are replaced by many indirect methods for generating DEM. In this study, DEM is proposed to be generated from point clouds rapidly collected by laser scanning or photogrammetry. Two datasets are used for checking the proposed data processing process. As a result, two ground point cloud areas were extracted. Many ground points in the steepest areas cannot be extracted. For a flat area with less than 10° of slope angle, the results of ground point extraction are good. The surface is divided into many equal grid cells for generating DEM, and the grid cell’s elevation is computed from the point’s elevation inside it. Finally, DEMs are displayed as TINs by creating Delaunay triangle networks.
Extracting Ground Points and Generating Digital Elevation Model (DEM) from Point Clouds from Point Clouds
Lecture Notes in Civil Engineering
Reddy, J. N. (editor) / Wang, Chien Ming (editor) / Luong, Van Hai (editor) / Le, Anh Tuan (editor) / Phan, Anh Thu Thi (author) / Phan, Quoc Thai (author) / Nguyen, Anh Khoa Viet (author)
2022-09-21
8 pages
Article/Chapter (Book)
Electronic Resource
English
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