The assignment was to be used for the “Map” section on the back page of each Harper’s. The design problem was to graphically show the linked relationship between increased rainfall, global warming and the spread of infectious diseases such as cholera. The main challenge was to depict the different layers of information in a complimentary but distinct manner, showing each layer independently but making the correlation evident. Numerical information on the cholera data ranged from less than 10 cases per country to nearly 50,000, requiring an icon system that encompassed the vast margin through scale and color. Information had to be easily read and graphically appealing.