云南香格里拉区域尺度森林类型遥感分类评价

Remote Sensing Classification and Evaluation of Regional Scale Forest Types in Shangri-La, Yunnan

  • 摘要: 基于Google Earth Engine云平台和Sentinel–2影像,通过多时相影像和地形特征的不同组合,利用随机森林算法对云南省香格里拉地区的森林类型进行3个层次上的识别和分类制图。结果表明:多时相特征结合地形信息在3个层次上分类精度最高;森林和非森林类型,总体精度为98.15%,Kappa系数为0.9624;针叶林和阔叶林,总体精度为89.74%,Kappa系数为0.7926;8种针叶林类型,总体精度为92.87%,Kappa系数为0.9180。地形信息有利于森林类型信息的提取,多时相的Sentinel–2数据对于大范围精确识别森林类型具有较大的潜力。

     

    Abstract: Based on the Google Earth Engine cloud platform and Sentinel–2 image, the random forest algorithm was used to identify and classify the forest types in Shangri-La region of Yunnan Province at 3 levels by different combinations of multi-temporal images and topographic features. The results showed that the classification accuracy of multi-temporal features combined with topographic information was the highest at 3 levels. The overall accuracy of forest and non-forest types was 98.15%, and the Kappa coefficient was 0.9624. In coniferous forest and broad-leaved forest, the overall accuracy was 89.74% and the Kappa coefficient was 0.7926. For 8 coniferous forest types, the overall accuracy was 92.87%, and the Kappa coefficient was 0.9180. The results concluded that the terrain information is beneficial to the extraction of forest type information, and the multi-temporal Sentinel–2 data has great potential for the accurate identification of forest type in a large range.

     

/

返回文章
返回