Mapping is a very common commercial use of drones. With its unique flight capabilities and aerial views, a mapping drone can help surveyors quickly collect large-area image data, and automatically map flat areas or three-dimensional models of buildings, greatly improving the accuracy and efficiency of mapping. It can be said that a good mapping drone relies on mature surveying and mapping systems and GPS technology for accurate data. Currently, drones with RTK modules are specialists in this field, which can achieve centimeter-level positioning accuracy and generate high-precision maps of a large area.