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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Using Unmanned Aerial Vehicles in Postfire Vegetation Survey Campaigns through Large and Heterogeneous Areas: Opportunities and Challenges
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Using Unmanned Aerial Vehicles in Postfire Vegetation Survey Campaigns through Large and Heterogeneous Areas: Opportunities and Challenges

机译：在大面积和异类地区进行的后植被调查中使用无人飞行器：机遇与挑战

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This study evaluated the opportunities and challenges of using drones to obtain multispectral orthomosaics at ultra-high resolution that could be useful for monitoring large and heterogeneous burned areas. We conducted a survey using an octocopter equipped with a Parrot SEQUOIA multispectral camera in a 3000 ha framework located within the perimeter of a megafire in Spain. We assessed the quality of both the camera raw imagery and the multispectral orthomosaic obtained, as well as the required processing capability. Additionally, we compared the spatial information provided by the drone orthomosaic at ultra-high spatial resolution with another image provided by the WorldView-2 satellite at high spatial resolution. The drone raw imagery presented some anomalies, such as horizontal banding noise and non-homogeneous radiometry. Camera locations showed a lack of synchrony of the single frequency GPS receiver. The georeferencing process based on ground control points achieved an error lower than 30 cm in X-Y and lower than 55 cm in Z. The drone orthomosaic provided more information in terms of spatial variability in heterogeneous burned areas in comparison with the WorldView-2 satellite imagery. The drone orthomosaic could constitute a viable alternative for the evaluation of post-fire vegetation regeneration in large and heterogeneous burned areas.
机译：这项研究评估了使用无人机以超高分辨率获得多光谱正镶嵌卫星的机会和挑战，这对于监测大型和异类燃烧区域可能有用。我们在西班牙大火的周边，在3000公顷的框架内，使用配备了鹦鹉SEQUOIA多光谱摄像机的八旋翼飞机进行了调查。我们评估了相机原始图像和获得的多光谱正镶嵌图像的质量，以及所需的处理能力。此外，我们还比较了由正射无人机以超高空间分辨率提供的空间信息与由WorldView-2卫星以高空间分辨率提供的另一幅图像。无人机原始影像呈现出一些异常，例如水平条带噪声和非均匀辐射测量。相机位置显示单频GPS接收器缺乏同步性。基于地面控制点的地理配准过程在X-Y方向上的误差小于30 cm，在Z方向上的误差小于55 cm。与WorldView-2卫星图像相比，正交异体无人机提供了关于异类燃烧区域空间变异性的更多信息。在大面积和不同种类的烧伤地区，正射镶嵌无人机可能是评估火后植被更新的可行选择。

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