August 12, 2019. Iowa State University. Sustainable Urban Systems, Redesigning the Urban-Rural Interface along the Mississippi River.
2007 Map: link
2016 Map: link
Spatial heterogeneity 2007: link
Spatial heterogeneity 2016: link
The data source is here
The full citation to the data source is: van Donkelaar, A., R. V. Martin, et al. (2019). Regional Estimates of Chemical Composition of Fine Particulate Matter using a Combined Geoscience-Statistical Method with Information from Satellites, Models, and Monitors. Environmental Science & Technology, 2019, doi:10.1021/acs.est.8b06392. [Link]
You can change the transparency of the overlay under places / demo_ge_groundoverlay / ge_groundoverlay / properties. Questions, email me charles-stanier@uiowa.edu