Fig. 2From: Spatial accessibility to health facilities in Sub-Saharan Africa: comparing existing models with survey-based perceived accessibilityRelationship between modelled and perceived accessibility for respondents with or without access to motorized transportation. Euclidean distance A is expressed in meters, cost-distance methods B, C in minutes and Kernel density D in an adimensional unit. Curves are generated with a GAM function, with the shaded area showing confidence intervalsBack to article page