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Decreasing computational time of urban cellular automata through model portability / C. Dietzel in Geoinformatica, vol 10 n° 2 (June - August 2006)  

Public [article]  inGeoinformatica > vol 10 n° 2 (June - August 2006) . - pp 197 - 211 Titre : Decreasing computational time of urban cellular automata through model portability Type de document : Article/Communication Auteurs : C. Dietzel, Auteur ; K.C. Clarke, Auteur Année de publication : 2006 Article en page(s) : pp 197 - 211 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] automate cellulaire [Termes IGN] échantillonnage [Termes IGN] efficacité [Termes IGN] portabilité [Termes IGN] système d'exploitation [Termes IGN] traitement automatique de données Résumé : (Auteur) This paper investigates how portability of a model between different computer operating Systems can lead to increased efficiency in code execution. The portability problem is not a trivial one, as many geographic models are designed to be run inside a set environment (Unix, Solaris, Linux, and Windows), and are further limited by hardware constraints. The SLEUTH urban growth model [K.C Clarke, S. Hoppen, and L. Gaydos. "A self-modifying cellular automaton model of historical urbanization in the San Francisco Bay area", Environment and Planning B, 24:247-261, 1997] was implemented under three different operating Systems (Solaris, Linux, and Windows). Results suggest that the model's performance is optimized by porting it from its original environment (Unix/Solaris) to Linux or Windows where faster processors are available. While the results show optimization of model performance, there are some suggestions of computational bottlenecks that may eventually limit the increased performance of the model. Regardless, the research demonstrates that the portability of a model can lead to not only to a de-crease in computation time, but may increase the viability in practical applications and attract a wider user base. Copyright Springer Numéro de notice : A2006-216 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-006-7579-0 En ligne : https://doi.org/10.1007/s10707-006-7579-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27943 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-06021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Spatio-temporal dynamics in California's central valley: empirical links to urban theory / C. Dietzel in International journal of geographical information science IJGIS, vol 19 n° 2 (february 2005)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 19 n° 2 (february 2005) . - pp 175 - 195 Titre : Spatio-temporal dynamics in California's central valley: empirical links to urban theory Type de document : Article/Communication Auteurs : C. Dietzel, Auteur ; Martin Herold, Auteur ; J.J. Hemphill, Auteur ; K.C. Clarke, Auteur Année de publication : 2005 Article en page(s) : pp 175 - 195 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse spatiale [Termes IGN] Californie (Etats-Unis) [Termes IGN] classification barycentrique [Termes IGN] croissance urbaine [Termes IGN] densité de population [Termes IGN] échelle géographique [Termes IGN] modèle conceptuel de données spatio-temporelles [Termes IGN] population urbaine [Termes IGN] spatial metrics [Termes IGN] urbanisation [Termes IGN] ville Résumé : (Auteur) This paper explores an addition to theory in urban geography pertaining to spatio-temporal dynamics. Remotely sensed data on the historical extent of urban areas were used in a spatial metrics analysis of geographical form of towns and cities in the Central Valley of California (USA). Regularities in the spatiotemporal pattern of urban growth were detected and characterized over a hundred year period. To test hypotheses about variation over geographical scale, multiple spatial extents were used in examining a set of spatial metric values including an index of contagion, the mean nearest neighbor distance, urban patch density and edge density. Through changes in these values a general temporal oscillation between phases of diffusion and coalescence in urban growth was revealed. Analysis of historical datasets revealed preliminary evidence supporting an addition to the theory of urban growth dynamics, one alluded to in some previous research, but not well developed. The empirical results and findings provide a lead for future research into the dynamics of urban growth and further development of existing urban theory. Numéro de notice : A2005-047 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001713407 En ligne : https://doi.org/10.1080/13658810410001713407 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27185 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-05021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-05022	RAB	Revue	Centre de documentation	En réserve L003	Disponible