Le logiciel OH_FET pour l’analyse des dynamiques urbaines dans la longue durée

L’objectif de l’atelier est de proposer aux participants d’utiliser le logiciel OH_FET à partir de leurs jeux de données. Développé comme un logiciel libre, il rend accessible les outils d’analyses correspondant au modèle pour l’étude des villes à partir d’un jeu de données en entrée avec une structuration peu contraignante. Son utilisation est possible pour n’importe quel espace urbain à partir d’un ensemble d’objets historiques décrit par un terme dans un thésaurus, une géométrie et une chronologie sous la forme d’une date d’apparition et d’une date de disparition. Sur cette base, l’application effectue les déconstructions spatiale et temporelle préconisées par le modèle OH_FET et produit…

Modélisation de l’information spatio-temporelle

International audience

Study of the urban dynamics by a new computer application, OH-FET

International audience; The study of the urban fabric and the spatial dynamics of urban space is based on an understanding of the city as a complex system composed of individual historical objects. The OH_FET model which we developed since 2004, is based on this approach of urban space. It describes the historical urban object as the Cartesian product of three basic dimensions: function (social use), space and time from the works of Donna Peuquet in geomatics and James Allen in artificial intelligence. Although the heuristic potential of the model have already been proven to work on the cities of Tours and , more recently, Vendome in France, the integration constraints, the designing and da…

ToToPI (Topographie de Tours Pré-Industriel), a GIS for understanding urban dynamics based on the OH_FET model (Social Use, Space and Time)

http://proceedings.caaconference.org/files/2009/41_Rodier_et_al_CAA2009.pdf; International audience; ToToPI, for Topography of Tours Pre-Industrial, is a GIS for studying of the city of Tours (France) in large time span. The concepts for understanding the urban dynamic is based on considering the town as a set of complex objects, taking a systemic approach. The town system used to study the urban fabric over large time spans is composed of three sub-systems relating to historical objects from the level of the excavation to that of the former urban space: function (social use), space (location, surface area and morphology) and time (dating, duration and chronology). The historical object is …

OH_FET: a computer application for analysing urban dynamics over long time spans

International audience; OH_FET formalism has been designed to analyse urban fabric over long time spans (Lefebvre et al., 2008; Rodier and Saligny, 2010; Rodier et al., 2010). The conceptual model is founded on the idea of historical object (OH – objet historique) which is defined as the Cartesian product of three elementary dimensions: social use (what), space (where) and time (when). Processes are performed in Python programming language and data are stored in various kinds of spatial database. With a minimum of required data from archaeologists’ observations, the application allows users to automate the calculation of standardised indicators about urban transformations and to generate gr…

La modélisation de l'information spatio-temporelle