Abstract
How does the compositional arrangement of elements in a complex image, like a diagram, a picture or a map, represent the structural features of its content? In this paper I argue that they do so iconically, through the exploitation of relations of visual similarity and dissimilarity. I develop the general claim that our interpretation of this sort of images is guided by the implicit defeasible assumption that things that are patently related represent things that are relevantly related in a similar way. I also identify the usual intrinsic and extrinsic mechanisms we use to represent structural features and illustrate them with an example from real life: a recent infographic from a popular science magazine.