Compare Elevation Accuracy Between Ground and Airborne LiDARs – Roadside Slope as example

• Main Authors: Cheng-Fu Feng, 風承甫
• Other Authors: Jee-Cheng Wu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/f5h95q

碩士 === 國立宜蘭大學 === 土木工程學系碩士班 === 103 === Taiwan’s hillside is over-exploitation, poor soil and water conservation which located on pacific ring of fire and typhoon entrained abundant rainfall in summer and autumn. Thus, floods or mudslides and other disaster threaten people’s life and property safety. Due to the reason, obtaining the relevant information of the roadside slope, how to make data to be valid and follow-up of the multiple uses is very important. This study investigated Terrain LiDAR for detecting Airborne LiDAR for LiDAR point cloud of roadside slope. Since the two kinds of LiDARs of different point cloud density and have their scans dead, so compare accurate to the point cloud of Terrain LiDAR and Airborne LiDAR of roadside slope. In this research, Provincial Route 7, Provincial Route 8 and Provincial Route 9’s slope would be taken the test. First, defining the test area grid, calculated to obtain the LiDAR point cloud classification and classification before effective rate grid. Second, Random sample of 32 effective rate grid analysis. Then, the sampling grid with Airborne LiDAR minus Terrain LiDAR the resulting difference in elevation and its standard comparison with correlation coefficient. At last, the deviation of correlation coefficient of effective grid to further explore the elevation difference error sources. Basic on the research, scanning Terrain LiDAR of the elevation error often cause by radiation and scanning dead.