Map of northern Namibia showing health facility catchment areas developed using the modelled travel time to the nearest public health facility overlaid with the probability of attendance of a public health facility by children less than five years of when sick with fever. The health facilities are shown as blue dots. Darker shades of red represent increasing probability.
Alegana et al. International Journal of Health Geographics 2012 11:6 doi:10.1186/1476-072X-11-6