Established in 1936, the Harvard University Graduate School of Design (GSD) championed a synthesis of architecture, landscape architecture, and city planning under the collective banner of modern design. This chapter examines the presentation materials developed in the course of GSD all-school collaborative problems during the 1940s as a register of disciplinary negotiations between architecture and planning. I argue that data graphics strategies employed at Harvard communicated through specifically architectural means the disciplinary processes and knowledge structures of the American planning profession oriented to the ends of public administration and the methods of the social sciences. They did so by establishing visual connections between physical space and abstract data. The Harvard students’ statistical maps, charts, and diagrams were vivid material demonstrations of evolving disciplinary cross-currents between architecture and planning.