Abstract
With the development of UAV technology, obtaining high-resolution remote sensing images through aerial photography has gradually become popular. This technique has been widely used in various aspects of geomatics. However, state of UAV when flying in the air will be affected by the valley airflow due to small size, light weight, and low flying height in UAV. In addition, the image range of the non-measurement camera equipped with the drone is small, which may lead to a large error in plane and elevation accuracy. For example, it is difficult for the accuracy of drone photogrammetry to meet the survey work of the 1:500 large-scale topographic maps in hills and mountains. Therefore, how to improve the mapping accuracy of the UAV has attract people’s attention at present. In this paper, the source of errors in the 1: 500 UAV mapping process is used as an entry point, and the related factors that affect the accuracy of the mapping are analyzed, so as to improve the design of the UAV route.
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