Research On The Application Of UAV Oblique Photogrammetry Technology In The Integrated Project Of Housing And Real Estate

UAV Oblique photogrammetry technology is a high-tech developed in recent years,and is widely used in many fields of surveying and mapping such as disaster monitoring,terrain surveying,electric power inspection,housing and land integration,geophysical exploration,etc.The use of unmanned aerial vehicles to mount Obliqueing loads for measurement work greatly improves the operating efficiency,and the accuracy of the results is high.Compared with traditional operation methods,UAV aerial photogrammetry technology has a strong advantage,effectively make up for the limitations of traditional measurement technology.UAV Oblique photogrammetry technology is to quickly build a three-dimensional model with high-precision coordinates through high-resolution,high-overlap images obtained by UAV aerial operations,and then vectorize the three-dimensional model to output DSM,DOM,TDOM,DLG and other digital products for surveying and mapping.Therefore,the establishment of a high-precision three-dimensional model is the key to the UAV Oblique photogrammetry technology.This article mainly focuses on the application of the multi-rotor UAV Oblique photogrammetry technology in the integrated topographic map of the premises:(1)The principle of UAV aerial triangulation technology is described.According to the principle of lens distortion of UAV camera,this paper examines UAV camera by direct linear transformation(DLT)light beam adjustment method of non-measurement camera.After collating,the results of inspection are obtained,and the PMVS dense matching algorithm for multi-view oblique images is optimized.(2)In this paper,through in-depth study of the camera exposure delay mechanism and analysis of the effect of exposure delay on GPS / IMU-assisted air three,a GPS /IMU-assisted air three adjustment method that takes into account exposure delay is proposed,and a mathematical correction model for adjustment is derived.Using a rural real estate integration project in Pucheng County,Nanping City,Fu jian Province,the number of different image control points and different layout schemes were adopted,and a high-precision differential POS independent module device to solve the exposure delay was installed on the drone to carry out four kinds of air three designs.Program,and the accuracy analysis through the checkpoints shows that this method is the best solution.The researchsignificance of this method is to change the traditional image-controlled layout mode,and reduce a large amount of manpower and material resources while ensuring the accuracy of mapping.This method is particularly prominent when the personnel in complex terrain survey areas can hardly carry out fieldwork.(3)This paper proposes to use Mirauge3 D software for air three data processing,which can well solve the shortcomings of Context Capture software when the photos are too many,such as interruption,running collapse,long running time,air three faults,and rough three results.Using the complementary characteristics of the two softwares,the results of Mirauge3 D software's air three are imported into Context Capture software for model construction.According to the experimental comparison,it is proved that the joint use of the two softwares can improve work efficiency and improve the accuracy of air three.In terms of line drawing,this paper proposes two linkage and joint drawing methods in CASS?3D software,that is,the combination of CASS?3D "intelligent drawing" and three-dimensional "border edge co-edge" and other drawing methods to draw DLG line drawing,and pass the checkpoint accuracy assessment demonstration The accuracy meets the project requirements,and the efficiency and accuracy of the results have been further improved to achieve the effect of shortening the project cycle.