Much of the empirical research in cartography over the past half century addressed representation design, evaluating how maps visually encode geographic information from perceptual, cognitive, and social/critical perspectives. We remain active in the study of cartographic design, particularly in the face of evolving mapping technologies and professional practices. Our recent research on cartographic representation includes aesthetics and style, bivariate and multivariate mapping, multiscale generalization, semiotics, terrain representation, and uncertainty visualization, among other topics.