Evaluation of Red Edge of Sentinel-2A in Vegetation Classification of Lakeside Zone

doi:10.13466/j.cnki.lyzygl.2021.02.018

Abstract

Abstract:

Sentinel-2A image has been widely used in the vegetation growth monitoring field thanks to the advantages of high spatial resolution and continuous times series.Its special settings of the red edge bands ensure it can accurately capture the vegetation red edge features,which can avoid the influence of chlorophyll saturation effect and make it possible for the vegetation classification of high vegetation coverage.This study makes the classification of vegetation community in the lakeside of Taihu lake based on existing knowledge and builds a vegetation red edge slope calculation model to calculate the variation of slope of red edge in 2017.Finally,the results of classification based on normalized vegetation index and quantitative statistics on the separability of different vegetation communities under different classification methods are used as verification.The results show that the slope of the red edge of vegetation has a better effect on the classification of vegetation community in the lakeside zone,and has a more obvious advantage in the period of high vegetation cover.Therefore,it can be concluded that the red edge slope feature of sentinel-2A has a good application in the classification of vegetation community.

Key words: Sentinel-2A, lakeside zone, vegetation classification, slope of red edge, NDVI

CLC Number:

PU Yihan, ZHANG Dong, XU Dandan, LUAN Zhaoqing. Evaluation of Red Edge of Sentinel-2A in Vegetation Classification of Lakeside Zone[J]. FOREST RESOURCES WANAGEMENT, 2021, (2): 131-139.

Figures/Tables 12

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月份	捕获日期	月份	捕获日期
1	20170129	8	20170827
2	20170228	9	20170916
4	20170419	10	20181001
5	20170529	11	20171105
6	20170608	12	20171205

波段	分辨率/m	中心波长/nm	波段宽/nm
红波段B4	10	665	30
红边波段B5	20	705	15
红边波段B6	20	740	15
红边波段B7	20	783	20
近红外波段B8	10	842	115
红边波段B8A	20	865	20