Survey processes of suburban intermediate centres. The problem of central places and of centrality in a large built-up area as the Paris one involves directly the future of the city, it is peculiarly difficult to solve in the intermediate suburban centres located between the centre of Paris and the new towns. Effectively the study is hindered at the same time by conceptual difficulties ; what is a urban centre ? by changing locations in which each function tends objectively to privilege its own space without seeking the concentration in a same place, and by the data which are rare and varied. In spite of that, the perennity of the urban centre concept in the different profects and in the thought of the building authorities is a striking ...