Abstract: With the progress of technology and the accumulation of experience,the application of UAV aerial survey has been expanding,and point cloud has gradually become a new type of surveying and mapping geographic information product.The application of point cloud can greatly improve work efficiency and reduce labor intensity in the field.Sirius UAV as a high precision measuring UAV,the image matching point cloud can make a high precision digital elevation model,which can be used for the calculation of the earthwork of the road and the design of any section.Taking a highway road surveying project as an example,through the contrast analysis,this paper elaborates the feasibility of the application of new technology,which can provide a reference for similar projects.

Key words: point cloud, UAV, image matching, accuracy analysis, transection measurement