Spatial turn in post-metropolis imposes a reflection on governance and planning toolsDuring the last three decades, and following the dynamic pointed out by Font (2007) in its study about the 'explosion of the city', South European territories have changed. This change relies on a progressive colonization of larger areas (Burger et al., 2014;Soja, 2011a) by different urban elements, as inhabitants, 'central' functions (culture, retail, leisure, services, health care, education etc.) and specialized labor market and advanced productions. The result are new, rescaled formations of urbanized territorial organizations (Brenner, Schmid, 2014: 743), in which the banal image of the città diffusa (Indovina, 1990) evolved in a set of interacting environments. According to many different scholars (i.e. Andersen et al., 2011;Glaeser, 2011;Scott, 2011), those habitats assume a fragmented condition, following the physical, social and economic characters of the space. In recent times, academics have been involved in the study of this original environment, where global pressures and trends take place in specific contexts. I argue that if the descriptive tasks have been able to point out its values, its problems and its potentials, the issue of the governance of these post-metropolitan territories needs to be overhauled and especially, the power of decision-makers to produce adequate and relevant projects (Balducci, 2012) for these spaces. Within this framework, the aim of this article is reflecting on the process of production of a specific 'spatial knowledge' and its role for the governance of post-metropolitan territories, presenting two case-studies. The empirical and original representation of space has been a useful and effective support for local and regional actors in order to setting up focused policies and incisive strategies adapted to local contexts.Producing spatial knowledge provides a solid base for policies and strategies at intermediate scale In 2005, Amin and Thrift (2005: 25) pointed out the need of a different comprehension for the current territory due to its complexity, because they consider it «unreadable» if looked only through the consolidated tools of planning and geography. Other authors, as Farinelli (2009), pointed out that spatial descriptions have a prominent role in supporting specific approaches to physical reality and its spatial projection and, consequently, justifying power relationships and/or social orders which shaped them. Therefore, once we reflect on -and we innovate -the way in which we represent the space, we influence the institutional Nowadays, recent evolution of eu urban regions imposes a focus on forms of governance and on the role of public actors in proposing adequate and relevant projects for post-metropolis. The aim of this article is discussing the potential of spatial knowledge -an alternative form of territorial representations based on performative approaches and interpretative readings -, within processes of decision making, especially when consolidated concepts, techniq...