Research on Ecoenvironmental Quality Evaluation System Based on Big Data Analysis

Figure 3

The NDSI distribution map of remote sensing data in various periods for Dongjiangyuan River: (a) 1991; (b) 2000; (c) 2004; (d) 2010; (e) 2013; (f) 2018; (g) 2019.

(a)

(b)

(c)

(d)

(e)

(f)

(g)