Research On Large-scale Mapping Method For Small Unmanned Aerial Vehicle Aerial Survey System

UAV aerial system as a means of large-scale map,has been recognized in many areas.With the rapid development of domestic light and small unmanned aerial vehicle platform and digital camera,the technology is maturing,the production cost is gradually declining,the unmanned aerial photography measurement software is automated and intelligent,and the UAV will walk into the large scale terrain Figure map of the field,has been replaced by the traditional field measured map of the trend.The photogrammetric system not only can carry out the strict aerial triangulation to generate the digital elevation model(DEM)?the digital orthophoto model(DOM)and the digital surface model(DSM)can also intelligently reconstruct the dense point cloud information by multiple steps such as image matching.The digital line graphic(DLG)is based on the traditional "binocular vision" artificial three-dimensional mapping.In this paper,a large-scale mapping method for small UAV aerial system based on dense point cloud and orthoimage is discussed in this paper.This method is based on the Pix4 Dmapper software to generate the digital orthophoto(DOM),digital surface model(DSM),dense point cloud data.Based on this,MapMatrix "binocular vision" artificial three-dimensional mapping,ArcGIS and CASS The Pix4 Dmapper point cloud editing and CASS mapping three digital line mapping method,the DLG production;Finally,the method and the traditional based on "binocular vision" artificial three-dimensional mapping method for precision and efficiency Comparative analysis.The results show that the method avoids the error of human eye interpretation,and the mapping accuracy is reliable.The requirements of the map personnel are reduced,and the work can be done without long training.The production efficiency is greatly improved.