Figure 3From: Human population, urban settlement patterns and their impact on Plasmodium falciparum malaria endemicityThe Normalized Difference Vegetation Index (NDVI) classes used in this study. The NDVI was calculated from AVHRR, then classified into NDVI < 0.350, corresponding to drier, relatively less vegetated areas and NDVI > = 0.35, corresponding to wetter, relatively more vegetated areas.Back to article page