Centre de documentation
scientifique

What is so “hot” in heatmap? qualitative code cluster analysis with foursquare venue / Ilyoung Hong in Cartographica, vol 52 n° 4 (Winter 2017)  

Public [article]  inCartographica > vol 52 n° 4 (Winter 2017) . - pp 332 - 348 Titre : What is so “hot” in heatmap? qualitative code cluster analysis with foursquare venue Type de document : Article/Communication Auteurs : Ilyoung Hong, Auteur ; Jin-Kyu Jung, Auteur Année de publication : 2017 Article en page(s) : pp 332 - 348 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse spatiale [Termes IGN] carte de densité de clics [Termes IGN] distribution spatiale [Termes IGN] réseau social géodépendant [Termes IGN] Seattle (Washington) [Vedettes matières IGN] Géovisualisation Résumé : (Auteur) Foursquare is a popular Web service and a representative location-based social network (LBSN) service using position data. Heatmap is a widely used means of geovisualization for analyzing social data with locational values. Until now, heatmap analysis of LBSN has focused on identifying quantitative distribution and patterns, with little consideration of the qualitative analysis of data content. Based on a case study of Foursquare venues and user-created content in Seattle, WA, this study conducts analyses assessing both the quantitative spatial distribution and the qualitative characteristics of coffee shops in the Seattle metropolitan area. It specifically proposes a new analytical method referred to as “code cluster,” which is designed to employ quantitative and qualitative approaches simultaneously. The significance of this method is its capacity to explain geographical differences in terms of qualitative traits in cluster regions, in addition to analyzing their spatial characteristics and distributions. In introducing this new hybrid approach, our aims are to reflect the original intent and essence of the data throughout the research process and to make further efforts to analyze and interpret the contextualized meanings. This will be possible through integration of advanced spatial analysis, geovisualization, and qualitative research that build on current geographic and geovisual research with big data. Numéro de notice : A2017-830 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/cart.52.4.2016-0005 En ligne : https://doi.org/10.3138/cart.52.4.2016-0005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89364 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-2017041	SL	Revue	Centre de documentation	Revues en salle	Disponible

Bumps and bruises in the digital skins of cities: unevenly distributed user-generated content across US urban areas / Colin Robertson in Cartography and Geographic Information Science, Vol 43 n° 4 (September 2016)  

Public [article]  inCartography and Geographic Information Science > Vol 43 n° 4 (September 2016) . - pp 283 - 300 Titre : Bumps and bruises in the digital skins of cities: unevenly distributed user-generated content across US urban areas Type de document : Article/Communication Auteurs : Colin Robertson, Auteur ; Robert Feick, Auteur Année de publication : 2016 Article en page(s) : pp 283 - 300 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] analyse de données [Termes IGN] Dallas (Texas) [Termes IGN] données descriptives [Termes IGN] données localisées des bénévoles [Termes IGN] données socio-économiques [Termes IGN] géobalise [Termes IGN] image 2D [Termes IGN] Nouvelle-Orléans (Louisiane) [Termes IGN] qualité des données [Termes IGN] représentation des données [Termes IGN] representativité [Termes IGN] Seattle (Washington) Résumé : (Auteur) As momentum and interest build to leverage new forms of user-generated content that contains geographical information, classical issues of data quality remain significant research challenges. In this article, we explore issues of representativeness for one form of user-generated content, geotagged photographs in US urban centers. Generalized linear models were developed to associate photograph distribution with underlying socioeconomic descriptors at the city-scale, and examine intra-city variation in relation to income inequality. We conclude our analyses with a detailed examination of Dallas, Seattle, and New Orleans. Our findings add to the growing volume of evidence outlining uneven representativeness in user-generated data, and our approach contributes to the stock of methods available to investigate geographic variations in representativeness. In addition to city-scale variables relating to distribution of user-generated content, variability remains at localized scales that demand an individual and contextual understanding of their form and nature. The findings demonstrate that careful analysis of representativeness at both macro and micro scales can simultaneously provide important insights into the processes giving rise to user-generated data sets and potentially shed light on their embedded biases and suitability as inputs to analysis. Numéro de notice : A2016-415 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2015.1088801 En ligne : https://doi.org/10.1080/15230406.2015.1088801 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81309 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2016041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Satellite-derived urban heat islands from three coastal cities and the utilization of such data in urban climatology / M. Roth in International Journal of Remote Sensing IJRS, vol 10 n° 11 (November 1989)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 10 n° 11 (November 1989) . - pp 1699 - 1720 Titre : Satellite-derived urban heat islands from three coastal cities and the utilization of such data in urban climatology Type de document : Article/Communication Auteurs : M. Roth, Auteur ; T.R. Oke, Auteur ; W.J. Emery, Auteur Année de publication : 1989 Article en page(s) : pp 1699 - 1720 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] corrélation [Termes IGN] image NOAA-AVHRR [Termes IGN] image thermique [Termes IGN] Los Angeles [Termes IGN] microclimat [Termes IGN] milieu urbain [Termes IGN] nuit [Termes IGN] occupation du sol [Termes IGN] rayonnement infrarouge thermique [Termes IGN] Seattle (Washington) [Termes IGN] thermographie [Termes IGN] Vancouver (Colombie britannique) [Termes IGN] ville Numéro de notice : A1989-381 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168908904002 En ligne : https://doi.org/10.1080/01431168908904002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25340 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-89101	RAB	Revue	Centre de documentation	En réserve L003	Disponible