Application of Airborne LiDAR Data in the Production of Large-scale Topographic Maps
Compared with digital aerial photogrammetry stereoscopic collecting geomorphic elements,it is more efficient and accurate to obtain contour lines and elevation points through airborne LiDAR data.Taking the 1∶500 topographic map production project of a cer-tain place in Nanchong city as an example,this paper explores the application mechanism of airborne LiDAR technology combined with digital aerial photogrammetry technology in the measurement of urban large-scale topographic maps,forms a complete set of technical operation process,analyzes the feasibility of the method and systematically evaluates the accuracy of the mapping results.The results show that the accuracy of geomorphic elements obtained based on airborne LiDAR data can meet the accuracy requirements of 1∶500 scale topographic maps.
digital aerial photogrammetryairborne laser scannerstereoscopic mappinglarge-scale topographic maps
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