基于多旋翼无人机低空摄影的公路边坡测绘研究

he mapping method of road-slope based on low-altitude aerophotogrammetry by using multi-rotor UAV is proposed. To this end, the Digital Orthophoto Map (DOM) and the Digital Surface Model （DSM）of a road-slope were obtained based on the proper hardware of UAV, the proper flight route and the proper using of software for digital image processing. The mapping results of case study on the road-slope show that, 1) the error in length is 2%, indicating the DOM result can be used in the plan mapping of road-slope; 2) the error in slope is 1 , indicating the DSM results can be used for the mapping of typical cross-section. In addition, the typical cross-section and the whole Surface of the road-slope can be intuitively shown by the DSM results, facilitating the observation on the conditions of the road-slope.