Application Analysis Of UAV Measurement Technology In Topographic Survey And Mapping

In recent years,topographic survey has been carried out by using unmanned aerial vehicle remote sensing,which has achieved rapid mapping,high accuracy,low cost and labor saving.The transformation from field survey to internal processing has been basically realized,and the production speed of mapping can be greatly accelerated in large-scale topographic map survey.However,the traditional aerial photography technology and operation process can no longer meet the rapid development and realtime requirements of topographic survey in the new era.Therefore,UAV survey technology has an extensive and promising prospect in topographic survey.Taking actual projects such as flat land,hills and mines as research objects,the technical points and matters needing attention in aerial photography and actual flight of unmanned aerial vehicles under different terrain conditions are compared and analyzed,as well as the advantages and disadvantages of aerial survey using unmanned aerial vehicles in terrain survey.In this paper,Tianjin Jinghai leveling area is taken as the research object to explore the optimal layout method of ground control points.In order to enhance the internal work,the spatial data processing process of pixel mapping after image distortion removal,refined position information and mapping accuracy are compared and analyzed,and it applies an efficient processing method of complex terrain with pixel mapping as the main and pixel mapping as the auxiliary.Through the comparison of precision generated by the three different surveying and mapping,it is comprehensively divided into: analyzing the topographic survey of unmanned aerial vehicles under different topographic conditions,putting forward a series of matters needing attention in the aerial survey process to ensure the surveying and mapping precision,and obtaining the factors influencing the precision under different topographic conditions;Through the operation and analysis of the generation process of digital product maps(DLG)and the brief introduction of the usage of different digital products,a set of efficient operation processes in the management of internal business departments are obtained.Comprehensive research on unmanned aerial vehicle aerial photography technology and optimization of the processing flow of aerial survey data can further expand the application and analysis of unmanned aerial vehicle aerial photography technology in topographic survey,promote the transformation of traditional topographic survey work to a more efficient and convenient measurement method,and point out further direction for the application of unmanned aerial vehicle aerial photography technology in other aspects.Figure 28;Table 35;Reference 67...