Figure 5

Standard Deviation Ellipse of the CHD Prevalence Hotspot. It is the standard deviation ellipse of the CHD prevalence hotspots detected by $\mathit{Getis}\text{'}\mathit{s}{\mathit{G}}_{\mathit{i}}^{*}$ at different distance thresholds. (a) distance threshold = 14 km, (b) distance threshold = 20 km, (c) distance threshold = 30 km, (d) overlay of the standard deviation ellipse.