Fig. 5

The spatial distribution of RTCL and FTCL from 1990 to 2020 (Note: (a) and (b) are results during 1990–2000, (c) and (d) are results during 2000–2010, (e) and (f) are results during 2010–2020) (Map processed by ArcMap 10.8. URL: http://www.esri.com/).