Exploring new geographies of interactions in and around the metropolitan area of Brussels

Abstract : In a global effort to achieve sustainable land management, regional and urban planning call for new adaptive datasets and methods to better grasp interactions between people and places. Understanding the moves of people, freight and information, and the relationships with the geographies of places are necessary knowledge for land use policies. Big-data currently offer a huge amount of information at very fine scales and in real-time. Analysing these data requires new techniques to obtain quick robust results. When dealing with origin and destination matrices resulting from big-data, community detection methods are useful to find how places are connected. The Louvain Method was applied on census or sensors datasets to define ‘interaction fields’. Analyses are performed on Belgium and Brussels. After a theoretical background, the second Part performs sensitivity analyses of the Louvain Method. The third part analyses moves of people. Results show that communities of commuting moves are much larger than those obtained by residential changes, and that administrative borders are serious constraints, confirmed by the study of train schedules requests. The fourth part uses GPS traces left by trucks as proxy of freight transportation. Diverting a dataset from its original fiscal objective requires pre-processing and conceptualisation that are time consuming. However, outcomes show that this dataset is a real opportunity to model goods transportation. Finally, the fifth part deals with mobile phone as proxy of moves of information. The very fine scale of the data and their variation in time lead to urban pulses but also to partitions varying in time and space. Big-data are a real opportunity to measure and understand space, but they need to be clearly understood and theoretically conceptualised.
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Arnaud Adam. Exploring new geographies of interactions in and around the metropolitan area of Brussels. Geography. Université catholique de Louvain, 2019. English. ⟨tel-02284406⟩

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