Study On The Accuracy Of Drawing Large Scale Topographic Maps With 3D Model Of UAV Oblique Photogrammetry

Oblique photogrammetry technology as a photogrammetry technology developed in recent years,has more applications in the three-dimensional modeling of digital cities.At present,the use of drones to shoot three-dimensional models of real-time imagery to create realistic three-dimensional models,there have been more mature technology methods and data processing software;research on real-time three-dimensional model measurement and production has always been a hot issue,it carries on the real three-dimensional model Vector digitization has great application significance.With EPS platform software,the use of three-dimensional model and two-dimensional positive image map for topographic map drawing,breaking through the limitations of the traditional terrain map drawing needs to be painted,or need to use stereo glasses to observe multiple photos on the simulated three-dimensional model Limitations.This paper proposes a new method for large scale mapping of topographic maps for this problem.It only requires a small amount of field measurements and does not require equipment to be worn.Data processing within the room can be used to complete the mapping of large-scale topographic maps.This type of topographic map drawing method greatly improves the production efficiency,reduces the labor cost,and has a high reference value for the production of surveying and mapping operations.Digitizing three-dimensional and two-dimensional models,which have high accuracy requirements for model accuracy and accuracy of two-dimensional and three-dimensional model mapping.This article refers to a large number of domestic and foreign relevant literature and experimental data research,analyzes the accuracy of the three-dimensional model of tilt camera measurement of drones,follows the technical standards and relevant laws of drones,conducts drone flight experiments,and analyzes the tilt using EPS software.The Influence of Mapping Accuracy and Different Drawing Methods on the Drawing Accuracy of Photography Three-dimensional Models.The research content of the thesis mainly includes the following three parts:(1)The technical theory of tilted photographic measurement and the system composition of tilted photographic measurement for drones are introduced in detail.The key technologies for 3D modeling of tilted photographic measurements are image matching,aerial triangulation,dense matching,triangulation,texture mapping.Five key technologies are introduced and analyzed in detail.(2)Analyze the main error sources of 3D modelling accuracy of oblique photogrammetry theoretically.Take Yaoshan Village and A-Gan Town as experimental areas,design a drone inclination photogrammetry experiment,and analyze the accuracy of the experimental data.Aerial triangulation accuracy index,evaluation of the accuracy of three-dimensional model.(3)Analyze the precision of human error in the process of drawing topographic maps,use EPS to collect topographic map data,design and test the accuracy of topographic maps,and analyze the precision of 2D and 3D models for drawing large-scale topographic maps.Finally,the method of drawing topographic map using 3D model and 2D model is summarized.