Abstract: In recent years, low altitude unmanned aerial vehicle(UAV) has been widely used in the field of surveying and mapping, Accurate and rapid acquisition of earthwork volume is of great significance to engineering construction. This paper mainly introduces the method of earthwork volume calculation by UAV aerial photography collecting three-dimensional point cloud data mapping. Taking the earthwork measurement during the construction of Shenjiang Industrial Park as an example, the research shows that UAV aerial mapping has obvious advantages over traditional total station and GPS mapping. The case results show that compared with the traditional UAV aerial photography method, the manual workload and labor intensity are greatly reduced. At the same time, when the accuracy index is almost the same as that of the traditional method, the amount of data per unit area is far greater than that of the latter, and the work efficiency is greatly improved.

Key words: UAV, earthwork survey, point cloud data, accuracy analysis