Fig. 1From: Effectiveness of the spectral area index created by three algorithms for tree species recognitionImage of WorldView-3 (RGB 532 combination) in the study area with sample distribution of different tree species. T1–T16 represent the serial numbers of the 16 different tree species/bamboo to be classified. The dots of different colours in the image represent the collection locations of the corresponding tree species and grass samplesBack to article page