Figure 2
From: Quantitative urban classification for malaria epidemiology in sub-Saharan Africa
Classification of level of urbanization in Kisumu, Kenya using three methods. a) Classification based on administrative designation as rural or urban; b) Classification based on population density thresholds: urban > 1,000/km2; peri-urban > 500/km2; c) Classification based on k-means clustering of factors identified through principal components analysis. In all cases, darker regions are more urban.