Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 12 March 2020 doi:10.20944/preprints202003.0213.v1 EXTENDING THE CONCEPT OF CITY FOR THE DELINEATION OF LARGE URBAN REGIONS (LUR) FOR THE CITIES OF THE WORLD Céline Rozenblat, University of Lausanne,
[email protected] Abstract: Cities’ delineation remains a hot topic of debate in a time where comparisons between cities are becoming increasingly based on different issues that address various scales of interventions and thus different concepts of cities. Aiming to compare cities and their insertion into globalization, we suggest that the “urban field of influence” is the best way to approach cities for this specific perspective. However, after reviewing the different existing possible concepts, we replace this concept with four different approaches proposed by Pumain et al. (1992): political entities, morphological agglomerations, functional urban areas and conurbations/Mega city regions. We discuss the top-down and bottom-up existing initiatives launched at the world scale and then use a mixed top-down and bottom-up approach to propose a new delineation of a large urban region (LUR), denoting a concept close to the conurbation or Mega city-region concept. The compositions of these LURs are published as an initial incomplete framework, suggesting the need for further critical comments and contributions to improve them. Keywords Cities, definition, Megalopolis, Large Urban Regions, Functional Urban regions, Urban agglomerations, world, statistical delineation, comparative urban research Introduction The issue of defining cities worldwide in a comparative way recently emerged with the visible growth of the urban population (reaching more than half of the world’s population in the 2000s, UN Habitat, 2016) and the increasing global insertion of cities.