Fig. 1. (a, b) Overview of the study area; (c, d) Orthophoto of the study area

Fig. 2. "Fairy circle" and normal vegetation identification technology route based on random forest algorithm

Fig. 3. Schematic diagram of the random forest algorithm

Fig. 4. (a) Original intensity, and (b) corrected intensity, where the red box represents the training set and the orange box represents the replacement training set

Fig. 5. (a) Extracted result obtained by reference [13]; (b) Extracted result obtained by the proposed method; (c) Extracted result obtained by the proposed method without geometric features; (d) Extracted result obtained by the proposed method without spatial coordinates; (e) Extracted result obtained by the proposed method without corrected intensity