Comparison of Measurement Accuracy for Planning Condition Verification Measurement Based on Ground-based Laser Scanning and Hand-held Laser Scanning
In view of the complex spatial distribution of urban scene,traditional surveying and mapping technology can not meet the needs of planning verification and measurement,and three-dimensional laser scanning technology is not mature in planning verification and measure-ment,this paper takes the newly built factory in Nansha District of Guangzhou city as the experimental area,and studies the feasibility of RANSAC algorithm and least squares algorithm to automatically extract the outer contour of buildings.The results obtained by different plat-form laser scanning methods are compared with the traditional methods.The results show that the handheld 3D laser scanning method has the highest scanning efficiency and the lowest cost,but the quality and accuracy of the collected point cloud are lower than that of the ground-based 3D laser point cloud.Field verification has shown that ground-based LiDAR scanning meets the precision requirements of measurement standards,while some building edge lengths measured with hand-held 3D laser scanning have larger errors.Accuracy verification and control are needed during the production process.
万方数据
维普
