Figure 3
Spatial distribution maps of (a) Cu, (b) Zn, (c) Pb, and (d) Cd in the study area. The base map was generated in ArcGIS10.2 (Esri, Redlands, CA, USA, 2014) (https://www.esri.com/en-us/arcgis/about-arcgis/overview).
Figure 3 | Scientific Reports
