Graph A in the top left shows the locations of schools in the study area in blue circles. Graph B at the top right shows the SSB point patterns in red dots. Graph C in the bottom left shows the vendor point patterns in black dots. Graph D shows an overlap of all the point patterns with a clustering of point patterns in the northern and south-easterly regions of the study area.

Figure 1. Kernel density and contour plots, demonstrating the density of sugar-sweetened beverage (SSB) advertisements and their distances to schools and vendors, Soweto, South Africa, 2013. Graph A shows the school point pattern, Graph B shows the SSB point pattern, Graph C shows the vendor point pattern, and Graph D shows all point patterns.

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Figure 2 is a contour density map highlighting the regions where the point patterns are most intense. This is indicated by the white-red regions, which fades into red and green colors the greater the distance from schools in the study area.

Figure 2. Kernel density and contour plots of school point pattern overlayed on vendor and sugar-sweetened beverage point patterns, Soweto, South Africa, 2013.

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