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The urban is a complex phenomenon whose exploration remains a important scientific challenge. Choosing complex thought in order to renew our capacities for understanding and action on and with the urban is not trivial. The complex thought developed by Edgar Morin is as elegant as elusive. The social sciences of space developed by Jacques Lévy and Michel Lussault have contributed to the renewal of the space's place to understand the inhabited. The objective of this thesis is to articulate these two constructivist approaches, in order to achieve a higher level of synthesis regarding the understanding and measure of the social construction of inhabited space. The thesis consists in three parts : - the epistemological challenge : how to enagage with a complex problem ? - the theoretical challenge : how to appreciate the social construction of space in order to measure an urban substance ? - the methodological challenge : how to measure this substance ? Based on reflections concerning measuring urbanity, I propose a generalization to that of the spatialization of social realities. By translating the notions of metric, scale and place, the author's work leads to the proposal of an indisciplinary concept and methodology for measuring the spatialization of social realities: the hologrammatic place. The thesis defended is that such conceptualization allows us to identify boundaries of places by their emergence. Such an a posteriori identification allows the establishment not of an indicator, but of a measure of the spatialization of social realities. This research contribute to the renewal of urban planning methodologies toward the establishment of a complex methodology that makes conceivable a relative and relational urbanism.