应用无人机(UAV)低空影像监测黄兔尾鼠鼠洞初探

Application of UAV Low-altitude image on rathole monitoring of Eolagurus luteus

黄兔尾鼠是新疆北部地区荒漠草原的主要危害鼠种之一。其灾害调查长期以人工地面调查为主。为探究无人机(UAV)低空遥感在黄兔尾鼠鼠洞调查中的适用性,选择巴音沟牧场典型鼠害区进行航拍试验,采用小型无人机作为低空遥感平台,获取研究区可见光航拍影像。采用极大似然法和面向对象分类方法提取鼠洞,通过混淆矩阵结合地面样方对分类结果进行精度评价。结果表明,应用UAV监测黄兔尾鼠洞穴的空间分辨率应不低于1.5 cm;极大似然法鼠洞分类精度为69%,而面向对象分类方法分类精度达91%,面向对象分类方法识别鼠洞正确率更高。UAV低空遥感在黄兔尾鼠灾害调查中表现良好,具有很好的应用和推广价值。

Eolagurus luteus is one of the main harmful rodent species in desert steppe in northern Xinjiang in China, and its damage has been investigated mainly by manual ground survey for a long time. In order to explore the applicability of the unmanned aerial vehicle(UAV) low-altitude remote sensing in the investigation of the rathole made by E. luteus, this paper selected the typical rodent damage area of Bayingou pasture for aerial photography test, and used the small UAV as the low-altitude remote sensing platform to obtain the visible aerial image of the study area. Then, the rathole was extracted by the maximum likelihood method and the object-oriented classification method, and the accuracy of classification results was evaluated by confusion matrix combined with ground sample. The results showed that the spatial resolution of monitoring the hole made by E. luteus should be no less than 1.5 cm. And classification accuracy of maximum likelihood classification was 69%, while that of object-oriented classification was 91%, which had a higher accuracy in identifying rathole. The UAV low-altitude remote sensing performed well in the investigation of E. luteus damage, with good application and popularization prospect.