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Remote Sensing for Natural Resources    2025, Vol. 37 Issue (1) : 68-75     DOI: 10.6046/zrzyyg.2023291
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Exploration of curved UAV flight path design methods for banded aerial survey areas
SUN Xinchao1(), LUO Qifeng2(), HE Zongyou2, ZHANG Aoli1, CAI Guolin1
1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
2. Institute of Land and Resource Surveying and Mapping of Guangdong Province, Guangzhou 510700, China
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Abstract  

To improve the efficiency of UAV aerial surveys in complex banded areas, this study explored and proposed a design method for curved flight paths. This method included planning algorithms for both horizontal and variable-altitude curved flight paths for banded areas, as well as a detection algorithm for flight path safety based on a digital elevation model (DEM). First, a simulation system for UAV aerial surveys was constructed, and the method was tested for planar aerial surveys, variable altitude aerial surveys, and safety detection through simulation experiments. Then, the quality of the aerial photography production data was verified using actual aerial photography experiments. The results indicate that design algorithms for horizontal and variable-altitude flight paths can automatically generate reasonable flight paths for complex banded areas and that the detection algorithm for flight path safety can ensure route safety. Compared to conventional flight paths, the quality of aerial photography data from curved flight paths can also meet the requirements of existing regulations. In other words, for aerial surveys in complex banded areas, the method presented in this study allows for the automatic design of reasonable, safe flight paths and, thus, can effectively improve the operational efficiency of UAV aerial photography.
Keywords banded areas      UAV aerial survey      design of curved flight paths      safety detection     
ZTFLH:  TP79  
  P237  
Issue Date: 17 February 2025
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Xinchao SUN
Qifeng LUO
Zongyou HE
Aoli ZHANG
Guolin CAI
Cite this article:   
Xinchao SUN,Qifeng LUO,Zongyou HE, et al. Exploration of curved UAV flight path design methods for banded aerial survey areas[J]. Remote Sensing for Natural Resources, 2025, 37(1): 68-75.
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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023291     OR     https://www.gtzyyg.com/EN/Y2025/V37/I1/68
Fig.1  Constructing the coordinate system
Fig.2  Diagram of Pi point outreach calculation
Fig.3  Schematic diagram of fixed heading height and variable height route
Fig.4  Buffer distance detection point schematic
Fig.5  UAV aerial camera simulation system interface
Fig.6  Simulation of single lens aerial photography of different routes
Fig.7  Simulation of five-shot tilt aerial photography of different routes
镜头 航线类型 航程/m 影像数量/张
单镜头 常规航线 6 452.60 130
水平曲线航线 3 062.15 70
变高曲线航线 3 153.34 70
五镜头 常规航线 6 453.30 650
水平曲线航线 3 062.10 350
变高曲线航线 3 151.50 350
Tab.1  Generating different route parameters
Fig.8  Results of orthophoto acquisition on different routes
Fig.9  Route safety detection experiment
Fig.10  Aerial data of different routes
Fig.11  Aerial photography results and checkpoints
检查点 常规航线 水平曲线航线 变高曲线航线
△x △y △x △y △x △y
GCP-1 -0.002 1 0.001 3 0.001 2 -0.003 0 0.001 8 0.000 0
GCP-2 -0.002 2 0.001 8 -0.004 2 0.001 5 0.004 3 -0.002 2
GCP-3 0.004 2 0.003 9 0.004 1 0.002 4 0.005 2 0.003 8
GCP-4 0.005 9 0.001 8 -0.004 4 -0.004 4 0.003 4 0.003 6
GCP-5 -0.002 3 -0.001 8 0.001 9 0.003 3 -0.002 1 0.001 6
Tab.2  Error of DOM data control points of different routes (m)
航线类型 DEM平均误差 DEM中误差
常规航线 0.465 9 0.711 6
水平曲线航线 0.486 5 0.717 0
变高曲线航线 0.326 4 0.422 7
Tab.3  Error comparison of DEM data of different routes (m)
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