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山洪灾害调查是防灾、减灾、救灾的重要方法之一。传统的调查手段效率低、观测成本高、时间周期长。通过无人机低空航测技术可快速、高效获取高分辨率影像。本文利用该技术获取调查区域影像,制作4D产品数字成果,辅助进行山洪灾害调查。应用案例表明,该方法用于山洪灾害调查效果高、成本低,数据成果精度高,能够满足山洪灾害调查工作要求。该技术在山洪灾害调查评价工作中具有较大的应用前景。
Flood disaster investigation is one of the important methods of disaster prevention, disaster reduction and disaster relief. The traditional means of investigation are inefficient, the cost of observation is high, and the period of time is long. UAV low altitude aerial survey technology can quickly and efficiently obtain high-resolution images. In this paper, we use this technology to obtain the images of the survey area, produce the digital results of 4D products and assist in the investigation of mountain torrent disasters. The application cases show that this method is suitable for the investigation of mountain torrent disasters and has the advantages of high effect, low cost and high precision of data achievement, and can meet the requirements of mountain torrent disaster investigation. This technique has great application prospect in the investigation and evaluation of mountain torrent disasters.