This thesis examines the concept of prefiguration within the context of Geographic Information Systems (GIS) interfaces, focusing on their affects, politics, and decision-making processes. The research investigates how GIS interfaces are integrated into civil defence and protection organisations in Portugal and Brazil, and the affective dynamics underpinning these integrations. By drawing from International Relations, Political Science, Science and Technology Studies, and Media Studies, the study explores the visual and aesthetic components of GIS interfaces and their impact on decision-making. Additionally, the thesis delves into Esri's influence as a leading provider of GIS technology, scrutinising its marketing strategies and aesthetic choices that shape perceptions of GIS. Through detailed case studies of the Portuguese GeoMAI and Brazilian S2ID systems, the thesis highlights how these interfaces shape political practices and embody visions of state efficiency, rationality and political systems