Abstract: With the advance of consumer-level unmanned aerial vehicles (UAVs) technology,it is possible to conduct photogrammetry by using consumer-level multi-rotor UAVs.In the paper,the unmanned aerial vehicles are first equipped with the ordinary high-precisely calibrated camera.Then the characteristics of the consumer-level UAVs is used to design and analyze the deployment of photo-control point,which can generate the general law of the deployment of photo-control point for consumer-level UAVs photogrammetry.The ability of performing large-scale map is analyzed and evaluated for UAVs.This result indicates that the mapping accuracies of UAVs,including aerial triangulation,the resolution and the elevation,meet the precise requirement of large-scale terrain survey,involving 1:500,1:1000 and 1:2000.Using consumer-level UAVs to conduct large-scale survey can improve the efficiency of work,reduce costs and be applied to mapping small area.

Key words: consumer UAVs, camera calibration, photo control point, large scale mapping, precision evaluation