The ICT revolution has impacted the way diasporic groups and individuals communicate and interact with one another. Diasporas are now fueled by unlimited flows of digital contents generated by daily activities or sudden historical events. As a natural result, the science of migration has evolved just as much as its own subject of research. Thus, dedicated branches of research like digital diasporas emerge at the crossroad between fields of social and computational sciences. Thereupon, new types of multi-scale reconstruction methods are developed to investigate the collective shapes of digital diasporas. They allow the researchers to focus on individual interactions before visualizing their global structures and dynamics. In this paper, we present three different multi-scale reconstruction methods applied to reveal the scientific landscape of digital diasporas and to explore the history of an extinct online collective of Moroccan migrants.

信息通信技术革命影响了侨民群体和个人相互交流和互动的方式。侨民现在受到日常活动或突发历史事件产生的无限数字内容流动的推动。自然而然地，移民科学的发展与其自身的研究主题一样多。因此，专门的研究分支，如数字侨民出现在社会科学和计算科学领域之间的十字路口。因此，开发了新型的多尺度重建方法来研究数字侨民的集体形态。它们允许研究人员在可视化其全局结构和动态之前专注于个体交互。在本文中，我们提出了三种不同的多尺度重建方法，用于揭示数字侨民的科学景观并探索已灭绝的摩洛哥移民在线集体的历史。