This image is usefu as an ethnographic text in so far that the author does well in explicating the socially contingent impact of exposure to lead to particular communities. In addition, while the map is primairly focused on macro-level data, the author does a strong job of describing how the forms of knowledge contained in the map are bound to the way poisoning is obscured from the general public. By doing so, the author is implicitly revealing how this (state/local) failure to visualize toxicity is prolonging poisoning.
