Comparison of water body extraction methods based on Sentinel-1 data,combined with Sentinel-2 data and Landsat8 images:taking Luban reservoir as an example
Base on sentinel-1 data,combined with sentinel-2 data and Landsat8 data,the annual changes of water bodies in Luban reservoir from 2017 to 2021 were extracted,the extracted water body area analysis was analyzed,and the difference of water bodies extracted by the two images of Luban reservoir were compared.The water body area of Luban reservoir in this study area was obtained through the calculation and analysis of the water body index.It was better to extract water from sentinel-2 image data than Landsat8 data.The overall classification accuracy of sentinel-2 image was 0.993 and the kappa coefficient was 0.991,while the overall accuracy of Landsat8 was 0.989 and the kappa coefficient was 0.986.Sentinel-2 data is more suitable for water body extraction in Luban reservoir,a large and medium-sized water body.
water body extractionwater indexSentinel-2Landsat8Sentinel-1
万方数据
维普
