DJI Drones Are Used In The Verification Of Different Terrain Mapping

Topographic map,which contains precise geographical location and attribute elements,has become an indispensable basic data in the construction of national economy.With the continuous development and progress of science and technology,the birth of advanced products such as digital total station,GPS and 3D laser scanner,has made surveying and mapping technology take a big step forward.The development of aerospace science and technology makes the resolution of satellite data higher and higher,and the way to obtain data more and more simple.Surveying and mapping technology also keeps pace with the Times,especially with the Internet,cloud computing,big data,intelligent machine and other advanced technology fields have carried on the deep integration and development.However,there are still many challenges in surveying and mapping technology.O n the one hand,the traditional ground mapping mode has large field workload,harsh environment and hidden safety risks.On the other hand,the traditional aviation and space mapping has the problems of long mapping cycle,high cost and low mapping accuracy.Therefore,this paper verifies the feasibility of DJI UAV in terrain mapping.The purpose is to replace and make up for the deficiency of the existing mapping model and promote the development of surveying and mapping science through the application research of new mapping technology.This paper selected Yunnan Tonghai Be lt water supply project,Dongchuan Dabaini River Belt debris flow ditch,campus terrain as the research area,to verify the feasibility of DJI Spirit 4,DJI Spirit 4 RTK unmanned aerial vehicle used in terrain mapping and key mapping technology research.First of all,strip water supply project is taken as the research object.Two mapping modes are used to make topographic maps: one is to use RTK technology to collect survey data,CASS7.1 to draw digital line drawing;The other mode is based on DJI Spirit 4 UAV mapping technology to make digital line drawing.Two methods are used to analyze the accuracy of the UAV mapping results.O ne method is to superposition the UAV mapping results with the topographic map made by RTK technology.Another method is to collect 18 ground object points which are easy to recognize and not easy to deform as checkpoints.Accurate analysis method based on point primitive is used to analyze the mapping results of UAV.The feasibility of using DJI Spirit 4 UAV in strip water supply project is verified by qualitative and quantitative analysis.Secondly,because the layout of image control points is an important link in the mapping technology of UAV,it has an important influence on the final mapping accuracy.Therefore,based on the DJI Spirit 4 UAV,this paper optimized the layout scheme of image control points by taking the Daimnihe strip debris flow ditch in Dongchuan as the research area.According to the number and location of 34 image control points(including 4 checkpoints),20 kinds of image control point layout schemes were designed.Then,the 3D modeling was carried out for 20 kinds of image control point layout schemes.Finally,the optimal image control point layout scheme for the Daunihe band-shaped debris flow gully in Dongchuan was selected through the accuracy comparison optimization within the group and between the groups.Finally,based on the mapping technology of DJI Spirit 4 RTK UAV,Lianhua campus of Kunming University of Science and Technology was taken as the research area to verify the feasibility of the image-free mapping technology of DJI Spirit 4 RTK UAV.The verification methods mainly include random collection of campus feature points by the total station to analyze the accuracy of checkpoints,prism-free collection of line and plane elements of buildings by the total station,and precision analysis based on line and plane elements.Therefore,it is feasible to apply DJI Spirit 4 RTK UAV to campus terrain mapping.Above all,the paper closely around the " DJI UAV is applied to the test of different topographic map" theme,with zonal water supply project,Dongchuan Dongchuan Dabaini river banded debris flow gully,the campus landscape as the research area,with DJI UAV as the main data acquisition mode,with the traditional way of ground data acquisition for DJI UAV mapping technology to verify the feasibility.The key technology of UAV mapping is optimized.