Figure 1
From: Annual economic impacts of seasonal influenza on US counties: Spatial heterogeneity and patterns
The kriging model to estimate county ILI rates: (a) Sample semivariogram of city ILI rates (red squares) and the fitted spherical model (blue curves): 46692*Nugget+342120*Spherical(3405500, 1599800, 328.8°) ; (b) Scatterplot of reported ILI rates vs. kriging predicted ILI rates.The blue straightline summarizes the trend as: y=0.698x+465.73 (Figures were created with ESRI ArcGIS 10.0).