Socio-spatial Heterogeneity in Megacities: Modelling small-scale inequalities with GIS in Rio de Janeiro
Department of Geography, University of Cologne
Last modified: June 8, 2007
Presentation date: 06/12/2007 10:00 AM in ISCTE-II B202
This paper will describe a way how a Geographic Information System (GIS) can be used to measure socio-spatial inequalities within cities. The focus of the procedure presented in this paper is the spatial location and proximity respective of unequally developed areas that enables one to model socio-spatial disparities. The basis for the analysis is the data of the official census of which the smallest units (sectors or tracts) have been smoothed by means of pycnophylactic interpolation in order to represent socio-economic indicators as a continuous surface. This surface has been visualized as 3D-Model and its gradient calculated. This shows how big are the social contrasts between neighbouring spatial units and thus inner urban social barriers. In the next step of the analysis the social gradient layer is the basis for calculating two indices showing socio-spatial heterogeneity and fragmentation of the urban social space. The first index shows hot spots of directly confronting social contrast while the other index aims at quantifying socio-spatial dispersion on the basis of administrative boundaries (districts). The results are new approaches that go beyond the classic models of socio-spatial city structure and the conventional measurements of social disparities.