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Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (9): 60-69.doi: 10.11707/j.1001-7488.20220906

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Identification of Dominant Tree Species Based on Multi-Temporal Sentinel-2 Images and SNIC Segmentation Algorithm

Wei Yue,Shiming Li*,Zengyuan Li,Qingwang Liu,Yong Pang,Lin Si   

  1. Key Laboratory of Forestry Remote Sensing and Information System, National Forestry and Grassland Administration Research Institute of Forest Resource Information Techniques, CAF Beijing 100091
  • Received:2021-08-20 Online:2022-09-25 Published:2023-01-18
  • Contact: Shiming Li

Abstract:

Objective: The spatial distribution of different tree species is the basis of forest inventory and forest dynamic monitoring, and is of great significance to the protection of forest ecosystems and the sustainable management of forest farms. Method: In this paper, Wangyedian forest farm in Inner Mongolia is selected as the research area. Multi-temporal Sentinel-2 multi-spectral data is used on the Google Earth Engine(GEE)cloud computing platform to extract band reflectance characteristics and spectral index characteristics. The simple non-iterative clustering(SNIC)superpixel segmentation algorithm and the support vector machine(SVM)machine learning classification method are used to identify object-oriented dominant tree species, and the impact of different multi-temporal data combinations on the classification result is analyzed. Result: Experimental result show that the classification accuracy of multi-temporal data combination is significantly higher than that of single-temporal data in each season. Comparing the multi-temporal data combination, The classification accuracy of the combined data of spring and autumn time series is similar to that of multi-season data combination, and their overall accuracy is 94.5%, 95.0%, 95.8%, respectively. Conclusion: The object-oriented classification method proposed in this paper based on multi-temporal data and SNIC algorithm can identify dominant tree species quickly and accurately. Among them, the classification result using multi-season data combination is the best, and the time series data of the spring and autumn seasons can also obtain good classification result, and the overall accuracy is a little lower than the optimal result.

Key words: multi-temporal, simple non-iterative clustering(SNIC), tree species identification, time series

CLC Number: