**Moacir P. de S Pereira** is the research data librarian at Columbia University Libraries. He helps researchers improve their use of data in their scholarly projects, including visualizing their data. Additionally, he is a scholar of literature and geography, where he uses spatial data to generate new literary research questions. Specifically, he focuses on American novels of the 20th and 21st centuries, tracking migration and geographical imagination. He has taught at New York University and the University of Chicago.