In the context of the success of urban studies based on Twitter, this article aims to investigate the production of geotagged data on this platform. Based on a case study of tweets located in Paris during the year 2016, we propose a socio-technical analysis of the production and representation of geotagged tweets. Taking into account the interactions between technical and social aspects, we focus on the effects of meaning produced by the materiality of the device and we discuss the recent use of geotagged data as digital traces of social action and more particularly the concept of the “spatial self.”