基于高分六号的水库水体信息提取方法研究——以山东省为例

Study on water information extraction method of typical reservoirs based onGF-6—Taking Shandong Province as an example

为探究高分六号卫星(GF6-WFV)影像的红边波段在水库水体信息提取的提升作用,基于峡山水库和岸堤水库的GF6-WFV数据进行水体特征分析,分别采用单波段、波段差值、波段比值、归一化水指数、红边水体指数进行水体面积提取,并以目视解译人工勾绘的水体矢量面积作为经验值进行精度验证。结果表明,红边水体指数提取的水体面积相对误差最低。该方法可对利用高分六号红边水体指数进行大范围水体信息提取提供参考。

In order to explore the enhancement of the"red edge"band of Gaofen-6 satellite(GF6-WFV)image in the extraction of reservoir water body information as a new data source on improving the extraction accuracy.Based on GF6-WFV data of Xiashan Reservoir and Andi Reservoir,the water body characteristics are analyzed,and the water body area is extracted by using single band,band difference,band ratio,Normalized Water Index(NDWI)and Red Edge Water Index(RSWI)respectively.And the visual interpretation of the artificially sketched water vector area is used as the empirical value to verify the accuracy.The results show that the relative error of water area extracted by RSWI is the lowest.This method can provide a method reference for large-scale water body extraction by using GF-6 red edge water index.