Research On Application Of EBEE UAV Aerial Photogrammetry System

With the continuous development of China's economic construction and national defense construction,each domain is increasing demand for mapping work,high-precision surveying and mapping method is adopted to complete each map scale,various types of maps has become an important theme of the international competition,in here photogrammetry play an important role.Unmanned aerial vehicle(uav)combined with aerial photographic measurement,becoming a uav low-altitude photogrammetry system was introduced into one of the important reasons for the surveying and mapping industry,combined with the measurement the introduction of the digital camera,making the uav aerial system becomes a new development direction in the field of aerial photography.Unmanned aerial system development has been increasingly mature,its application is becoming more and more widely.Unmanned aerial system,with its highly intelligent,high resolution,low cost,lightweight flexible,strong maneuverability etc,has become of a new type of surveying and mapping method of obtain high precision space geographic information data.This paper takes EBEE's aerial survey system as an example to study the application of uav aerial survey.This paper introduces the research background of uav aerial survey and the development history and research status of uav aerial photogrammetry,and learns some basic theoretical knowledge of aerial photogrammetry.On the basis of the composition of software hardware of EBEE uav measurement system,the following aspects are studied:(1)Design and summary of the working process of EBEE unmanned aerial survey system.Routes of the EBEE uav aerial system,like the control point selection,aerial time selection,field quality control,production in the industry are orthographic(DOM),digital elevation model(DEM)and digital surface model(DSM),and draw the working process of the digital topographic map(DLG)to carry on the design,andsummarizes the matters needing attention in the work.(2)Design of the control point layout plan.Trial design six kinds of layout scheme as locus of control,using Posteflight 3 d software,and the same set of aerial flight data of 1:2000 orthogonal projection like data,through the comparative analysis of the precision of the checkpoint and selected as the labor hours needed to control point layout of comparative analysis,from the perspective of mapping precision and the effort required to draw every two baseline,article 2 of article 6 of strip,about 700 metres as control point layout density is advisable.(3)TThe accuracy of EBEE's aerial survey system was verified.Based on map scale up low-altitude aerial photogrammetry and the choice of ground resolution requirements,in the same area using EBEE uav aerial system choice ground resolution limit of 5 cm,to 10 cm,20 cm,to obtain three groups of flight results.Through the same checkpoint precision inspection and analysis,test the EBEE uav aerial system mapping precision and surface coarse rate to meet the requirements of the rules of the corresponding map scale,but the elevation of the coarse rate does not meet the requirements.(4)The analysis of the influence factors of the aerial mapping of the uav to the elevation accuracy.Based on the principle of space intersection,the calculation formula of elevation accuracy is derived.This paper summarizes the factors that influence the accuracy of aerial survey of uav,such as point measurement precision,ground resolution and base height ratio.The calculation formula of elevation accuracy provides a feasible reference for the development of flight plan.This study is of reference to the practical application of unmanned aerial survey system.