A multi-band combination water index model based on Landsat 8

doi:10.13474/j.cnki.11-2246.2022.0135

Abstract

Abstract: In this paper, by analyzing the spectral difference between the visible light band and the near-infrared band in the Landsat 8 data, the visible light band in the Landsat 8 data is taken as one group, and the near-infrared band and the mid-infrared band are taken as another group, and a multi-band combination water index (MBCWI) model is constructed. Based on Landsat 8 data, water extraction experiments were carried out in Hefei, Ankang and Kangding areas with a total of 3 scene data and 5 different scenarios. The results show that the model can not only suppress the influence of clouds, shadows, bare soil, bright-colored ground objects and buildings on water extraction, but also can extract water containing a large number of cyanobacteria well, and the threshold is stable, and the Kappa coefficient is better than 0.968 5, the overall accuracy is as high as 99.69%, and the overall error is less than 8.92%. Compared with other water indices, the extraction accuracy is significantly improved.

Key words: water extraction, multi-band combination, water index, Landsat 8, accuracy verification

CLC Number:

P237

WANG Chunxia, ZHANG Jun, LI Yixu, FAN Chengcheng. A multi-band combination water index model based on Landsat 8[J]. Bulletin of Surveying and Mapping, 2022, 0(5): 20-25.

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