Analysis And Research On Mapping Accuracy Of UAV Based On PPK Technology

The low altitude UAV mapping has the characteristics of high efficiency,high accuracy,short working cycle,low cost and high flexibility,which effectively complements the aerial remote sensing and aerospace remote sensing.In recent years,it has been widely used in national major engineering construction,and has broad prospects in digital city construction,basic mapping and other aspects.The UAV,based on post processing kinetic,has the unique advantage in low altitude UAV mapping.The test is based on the UAV of post processing kinetic technology.When the number of image control points is different,the accuracy of digital products from the same test area is compared and analyzed.By expanding the area of the test area,the number of image control points can be obtained when the generated products meet the mapping accuracy requirements of the mapping scale.The test area is divided into three areas,about two square kilometers,four square kilometers and seven square kilometers.In the same measuring area,the number of image control points is obtained when the product meets the accuracy requirements of mapping scale.In different area of UAV mapping based on PPK technology,the reasonable number of image control points can not only ensure the mapping accuracy,but also reduce the cost and improve the work efficiency.In the same survey area,the plane point mean square error is easier to meet the error requirements,while the elevation point mean square error to meet the standard accuracy requirements needs to add image control points.After adding image control points,the change of plane mean square error is smaller,and the change of elevation mean square error is larger.The extracted elevation value is closer to the real elevation.By comparing a number of field data and extracted data,we get the corresponding conclusion of UAV mapping accuracy,which shows the applicability and feasibility.It can provide some basis and reference for the number of image control points and data processing of UAV Based on PPK technology.Figure 34;Table 18;Reference 68...