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Visualization of the spatial patterns of inter-urban income disparities using coordinate transformations / R. Gluhih in International journal of geographical information science IJGIS, vol 18 n° 3 (april - may 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 3 (april - may 2004) . - pp 281 - 297 Titre : Visualization of the spatial patterns of inter-urban income disparities using coordinate transformations Type de document : Article/Communication Auteurs : R. Gluhih, Auteur ; B.A. Portnov, Auteur Année de publication : 2004 Article en page(s) : pp 281 - 297 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes IGN] carte thématique [Termes IGN] disparité [Termes IGN] Israël [Termes IGN] milieu urbain [Termes IGN] revenu [Termes IGN] transformation de coordonnées [Termes IGN] urbanisation [Termes IGN] ville [Termes IGN] visualisation Résumé : (Auteur) Inter-urban income disparities reflect differences between individual urban localities in the average incomes of their residents. The present paper discusses different ways of visualizing such disparities on thematic maps. The approach we propose is based on the transformation of distances between individual localities and a reference city (e.g. a major population centre of a country) in proportion to the actual differences in the income levels. The general principle of such a transformation is to bring closer to the reference city places with higher incomes, while moving away localities with low income levels. Three alternative approaches to the implementation of this transformation technique are discussed. According to the 'actual distance' method, the spatial 'shift' of a locality on the map is set proportional to both the relative difference in incomes and the aerial distance between a locality and the reference city. In the 'proportional increment' transformation, the distance between a locality and the reference city is adjusted by a parameter whose values are proportional to income disparities between the two. Lastly, according to the 'concentric circle' transformation, localities with identical levels of incomes are positioned at a certain distance from the reference city, forming concentric circles around it. Both advantages and disadvantages of these transformation techniques are discussed, and the 'proportional increment' method is chosen as the best-performing visualization technique. The performance of this technique is demonstrated using income data for urban localities in Israel in 1991 and 1999. As analysis indicates, the proposed method helps to illustrate both the existing patterns of inter-urban income disparities and their dynamics over time. Numéro de notice : A2004-161 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001620951 En ligne : https://doi.org/10.1080/13658810310001620951 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26688 [article]

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