Abstract: The design of photovoltaic power station requires the higher precision of the plane and elevation in the PV field area. To avoid the terrain and land classification that cannot be occupied the design of photovoltaic power station needs to map 1:500 scale topographic map. Nowadays, the low-altitude UAV aerial survey is the common used technical means for PV field area mapping. However, this method is difficult to collect the high-precision ground elevation information in the sheltered area, and easy to result in large errors and cause losses to design and construction. In response to the above situation, a reasonable and efficient mapping scheme is developed in this paper, the low-altitude UAV-borne LiDAR system is used to conduct all-round data acquisition for the PV field area, then generates high-precision DEM and DOM products which are used to make 1:500 scale topographic map finally. Through the field accuracy comparison and analysis, the 1:500 scale topographic map can meet the design requirements of the PV field area perfectly, and the problem of large errors of the general aerial survey, which cannot express the micro-topography effectively, is solved in the vegetation shielding area.

Key words: UAV-borne LiDAR system, photovoltaic field mapping, DEM, DOM, DLG