{"id":175,"date":"2018-11-21T11:53:53","date_gmt":"2018-11-21T11:53:53","guid":{"rendered":"https:\/\/campus.hesge.ch\/blog-master-is\/?p=175"},"modified":"2020-01-06T12:50:05","modified_gmt":"2020-01-06T12:50:05","slug":"de-la-necessite-de-la-visualisation-face-au-deluge-des-donnees","status":"publish","type":"post","link":"https:\/\/campus.hesge.ch\/blog-master-is\/de-la-necessite-de-la-visualisation-face-au-deluge-des-donnees\/","title":{"rendered":"De la n\u00e9cessit\u00e9 de la visualisation face au d\u00e9luge des donn\u00e9es"},"content":{"rendered":"<blockquote>\n<p style=\"text-align: justify\"><em>\u00ab Philosophers have relied on visual metaphors to analyse ideas and explain their theories at least since Plato. Descartes is famous for his system of axes, and Wittgenstein for his first design of truth table diagrams. Today, visualization is a form of \u2018computer-aided seeing\u2019 information in data.<\/em><em> \u00bb<\/em> (Chen, Floridi, 2013)<\/p>\n<\/blockquote>\n<h2 style=\"text-align: justify\"><strong>Contexte<\/strong><\/h2>\n<p style=\"text-align: justify\">Le 19 octobre 2018 a eu lieu \u00e0 l\u2019aula de la HEG-Gen\u00e8ve un s\u00e9minaire s\u2019intitulant <a href=\"https:\/\/twitter.com\/heg_id\/status\/1052585434096824320\">\u00ab\u00a0Donn\u00e9es \u2013 Information\u00a0\u00bb<\/a>. Celui-ci a \u00e9t\u00e9 r\u00e9alis\u00e9 par trois \u00e9tudiants du <a href=\"https:\/\/www.hesge.ch\/heg\/formation-base\/masters-science\/master-en-sciences-linformation\">Master en Sciences de l\u2019Information<\/a>.<\/p>\n<p style=\"text-align: center\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-178 aligncenter\" src=\"https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/affiche_info-donn\u00e9es.png\" alt=\"\" width=\"258\" height=\"365\" srcset=\"https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/affiche_info-donn\u00e9es.png 523w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/affiche_info-donn\u00e9es-212x300.png 212w\" sizes=\"(max-width: 258px) 100vw, 258px\" \/><\/p>\n<p style=\"text-align: center\">Figure 1: Affiche du s\u00e9minaire \u00ab Donn\u00e9es \u2013 Information\u00a0\u00bb<\/p>\n<p style=\"text-align: justify\">Sur la base d\u2019articles scientifiques, trois questions principales ont \u00e9t\u00e9 soulev\u00e9es par les organisateurs du s\u00e9minaire (Cevey et al., 2018).<\/p>\n<p style=\"text-align: justify\">La question <em>\u00ab\u00a0Qu\u2019est-ce que la quatri\u00e8me r\u00e9volution au sens de Luciano Floridi\u00a0?\u00a0\u00bb<\/em> m\u2019a particuli\u00e8rement int\u00e9ress\u00e9 car elle annonce un changement de paradigme qui, certes, nous affecte tous, mais qui positionne en quelque sorte les sp\u00e9cialistes des sciences de l\u2019information comme des acteurs pivots. Nous nous retrouvons ainsi au centre des processus pour accompagner au mieux nos publics et trouver des lignes directrices au sein de cette r\u00e9volution num\u00e9rique<a href=\"#_ftn1\" name=\"_ftnref1\">[1]<\/a>.<\/p>\n<p style=\"text-align: justify\">Le second \u00e9l\u00e9ment qui m\u2019a marqu\u00e9 fut les nombreuses infographies et ic\u00f4nes utilis\u00e9es au sein de <a href=\"https:\/\/prezi.com\/p\/u9tevnj46lnw\/seminaire-information-donnees\/\">la pr\u00e9sentation<\/a>. En creusant d\u2019ailleurs les sujets d\u2019int\u00e9r\u00eat de <a href=\"http:\/\/www.philosophyofinformation.net\/\">Luciano Floridi<\/a>, philosophe de l\u2019information \u00e0 l\u2019Universit\u00e9 d\u2019Oxford, j\u2019ai pu remarquer que la visualisation \u00e9tait une th\u00e9matique majeure.<\/p>\n<h2 style=\"text-align: justify\"><strong>D\u00e9finitions et buts de la visualisation<\/strong><\/h2>\n<p style=\"text-align: justify\">La visualisation de l\u2019information est une repr\u00e9sentation de donn\u00e9es dans un espace physique sous la forme de graphiques. De m\u00eame, la visualisation se r\u00e9f\u00e8re autant \u00e0 la cr\u00e9ation de repr\u00e9sentations appropri\u00e9es qu\u2019\u00e0 la transmission\/diss\u00e9mination de ces derni\u00e8res (Chen, Floridi, 2013).<\/p>\n<p style=\"text-align: justify\">Pour aller des donn\u00e9es vers la connaissance, il faut que celles-ci soient bien form\u00e9es, significatives et v\u00e9ridiques<a href=\"#_ftn2\" name=\"_ftnref2\">[2]<\/a>. La cartographie de la visualisation (voir figure ci-dessous) reprend ces \u00e9l\u00e9ments en int\u00e9grant diff\u00e9rentes \u00e9tapes n\u00e9cessaires \u00e0 la cr\u00e9ation de ces repr\u00e9sentations graphiques. Dans la plupart des applications, la taille totale des donn\u00e9es est trop large pour \u00eatre compl\u00e9ment repr\u00e9sent\u00e9e de mani\u00e8re visuelle. Il s\u2019agit donc de s\u00e9lectionner certaines informations. Ce tri se fait soit par le syst\u00e8me, soit par le cr\u00e9ateur, soit par l\u2019utilisateur final (Chen, Floridi, 2013).<\/p>\n<p style=\"text-align: center\"><img decoding=\"async\" class=\"wp-image-177 aligncenter\" src=\"https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/cartographie_floridi.png\" alt=\"\" width=\"731\" height=\"476\" srcset=\"https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/cartographie_floridi.png 1780w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/cartographie_floridi-300x196.png 300w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/cartographie_floridi-768x500.png 768w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/cartographie_floridi-1024x667.png 1024w\" sizes=\"(max-width: 731px) 100vw, 731px\" \/><\/p>\n<p style=\"text-align: center\">Figure 2: Une cartographie de la visualisation (Chen, Floridi, 2013)<\/p>\n<p style=\"text-align: justify\">La visualisation a pour but de procurer une meilleure compr\u00e9hensibilit\u00e9 (<em>gain insight<\/em>) \u00e0 leurs utilisateurs. N\u00e9anmoins, ceci reste un objectif assez impr\u00e9cis car difficilement mesurable (Chen et al., 2014). Les m\u00eames auteurs listent tout de m\u00eame plusieurs avantages que pr\u00e9sentent une visualisation par rapport \u00e0 une lecture brute des donn\u00e9es en prenant l\u2019exemple d\u2019un s\u00e9ismographe\u00a0:<\/p>\n<ul style=\"text-align: justify\">\n<li>Effectuer des observations<\/li>\n<li>Faciliter la m\u00e9morisation externe<\/li>\n<li>Stimuler la r\u00e9flexion et engendrer de nouvelles hypoth\u00e8ses<\/li>\n<li>\u00c9valuer les hypoth\u00e8ses<\/li>\n<li>Diss\u00e9miner les connaissances<\/li>\n<\/ul>\n<p style=\"text-align: justify\">La seule qualit\u00e9 mesurable de la visualisation des donn\u00e9es r\u00e9side cependant dans le gain de temps de lecture que cela procure aux utilisateurs (Chen et al., 2014). Cet indicateur est particuli\u00e8rement int\u00e9ressant dans un monde o\u00f9 la cr\u00e9ation de donn\u00e9es est toujours croissante.<\/p>\n<h2 style=\"text-align: justify\"><strong>La visualisation dans le contexte du d\u00e9luge des donn\u00e9es<\/strong><\/h2>\n<p style=\"text-align: justify\"><em>\u00abInformation visualization promises to help us speed our understanding and action in a world of increasing information volumes.<\/em><em> \u00bb<\/em> (Chen, Floridi, 2013 citant Card, 2007)<\/p>\n<p style=\"text-align: justify\"><a href=\"https:\/\/blogs.cisco.com\/sp\/the-zettabyte-era-officially-begins-how-much-is-that\">A l\u2019\u00e8re du zettabyte\u00a0<\/a><a href=\"#_ftn3\" name=\"_ftnref3\">[3]<\/a>, nous g\u00e9n\u00e9rons une quantit\u00e9 de donn\u00e9es de fa\u00e7on exponentielle. Nous avons plus que besoin de synth\u00e9tiser les informations, de les filtrer et de les mettre sous forme de graphique pour faciliter la lecture.<\/p>\n<p style=\"text-align: justify\">Lorsque nous croisons une grande quantit\u00e9 de donn\u00e9es, des graphiques statiques ne me semblent pas \u00eatre une r\u00e9ponse suffisante. Il me para\u00eet n\u00e9cessaire de rendre les visualisations les plus modulaires possibles. L\u2019image ci-dessous est <a href=\"http:\/\/www.openculture.com\/2017\/10\/the-philosophers-web.html\">une repr\u00e9sentation interactive des influences qu\u2019ont eu les philosophes entre eux<\/a>. Les donn\u00e9es proviennent de triplets <a href=\"https:\/\/www.w3.org\/RDF\/\">RDF<\/a> (<em>Resource Description Framework<\/em>) de <a href=\"https:\/\/wiki.dbpedia.org\/\">dbpedia<\/a>, projet extrayant les donn\u00e9es structur\u00e9es de Wikip\u00e9dia.<\/p>\n<p style=\"text-align: justify\"><img decoding=\"async\" class=\"wp-image-176 aligncenter\" src=\"https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/philosopher-web.png\" alt=\"\" width=\"798\" height=\"414\" srcset=\"https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/philosopher-web.png 2846w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/philosopher-web-300x156.png 300w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/philosopher-web-768x398.png 768w, https:\/\/campus.hesge.ch\/blog-master-is\/wp-content\/uploads\/2018\/11\/philosopher-web-1024x531.png 1024w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p>\n<p style=\"text-align: center\">Figure 3: The Philosopher&#8217;s Web &#8211; source: <a href=\"https:\/\/kumu.io\/GOliveira\/philosophers-web\">https:\/\/kumu.io\/GOliveira\/philosophers-web<\/a><\/p>\n<p style=\"text-align: justify\">Ces visualisations devraient \u00eatre id\u00e9alement con\u00e7ues comme des \u00ab\u00a0p\u00e9riph\u00e9riques d\u2019entr\u00e9e\u00a0\u00bb (Jansen, 2014) o\u00f9 l\u2019utilisateur final pourrait lui-m\u00eame fouiller les donn\u00e9es d\u2019une mani\u00e8re interactive. En outre, les nouvelles annotations ou ajouts de donn\u00e9es par les chercheurs pourraient, apr\u00e8s curation, \u00eatre int\u00e9gr\u00e9es au sein de ces repr\u00e9sentations graphiques dynamiques. Chaque contribution deviendrait ainsi un n\u0153ud suppl\u00e9mentaire compl\u00e9tant un graphe de connaissances. La visualisation ne serait donc plus un \u00ab\u00a0but en soi\u00a0\u00bb mais une v\u00e9ritable m\u00e9thode n\u00e9cessaire \u00e0 l\u2019heure du Big Data, \u00e9poque o\u00f9 nous devons faire un tri et gagner du temps pour remplir au mieux nos missions de sp\u00e9cialistes en sciences de l\u2019information.<\/p>\n<h2 style=\"text-align: justify\"><strong>Bibliographie<\/strong><\/h2>\n<p style=\"text-align: justify\">CEVEY, Matthieu, COURTIN, Am\u00e9lie et PERRITAZ, Alex, 2018. S\u00e9minaire : Information &#8211; Donn\u00e9es. In\u00a0: <em>Master IS. S\u00e9minaires<\/em> [en\u00a0ligne]. Carouge, Suisse. 19 octobre 2018. [Consult\u00e9\u00a0le\u00a03\u00a0novembre\u00a02018]. Disponible \u00e0 l\u2019adresse\u00a0: <a href=\"https:\/\/prezi.com\/p\/u9tevnj46lnw\/seminaire-information-donnees\/\">https:\/\/prezi.com\/p\/u9tevnj46lnw\/seminaire-information-donnees\/<\/a>.<\/p>\n<p style=\"text-align: justify\">CHEN, Min et FLORIDI, Luciano, 2013. An Analysis of Information Visualisation. In\u00a0: <em>Synthese<\/em>. 2013. Vol.\u00a0190, n\u00b0\u00a016, p.\u00a03421\u20133438.<\/p>\n<p style=\"text-align: justify\">CHEN, Min, FLORIDI, Luciano et BORGO, Rita, 2014. What is Visualization Really for? In\u00a0: <em>arXiv:1305.5670 [cs]<\/em>. 2014. p.\u00a075\u201193. DOI\u00a010.1007\/978-3-319-07121-3_5.<\/p>\n<p style=\"text-align: justify\">FLORIDI, Luciano, 2011. <em>The philosophy of information<\/em>. Oxford\u202f; New York\u00a0: Oxford University Press. ISBN\u00a0978-0-19-923238-3.<\/p>\n<p style=\"text-align: justify\">JANSEN, Yvonne, 2014. <em>Physical and tangible information visualization<\/em> [en\u00a0ligne]. PhD Thesis. Paris, France\u00a0: Universit\u00e9 Paris Sud &#8211; Paris XI. [Consult\u00e9\u00a0le\u00a03\u00a0novembre\u00a02018]. Disponible \u00e0 l\u2019adresse\u00a0: <a href=\"https:\/\/tel.archives-ouvertes.fr\/tel-00981521\/document\">https:\/\/tel.archives-ouvertes.fr\/tel-00981521\/document<\/a>.<\/p>\n<h2 style=\"text-align: justify\"><strong>Notes<\/strong><\/h2>\n<p style=\"text-align: justify\"><a href=\"#_ftnref1\" name=\"_ftn1\">[1]<\/a> Lire l\u2019article <em>\u00ab\u00a0<a href=\"https:\/\/campus.hesge.ch\/blog-master-is\/de-limportance-dune-ethique-dans-linfosphere-la-quatrieme-revolution-technologique-selon-luciano-floridi\/\">De l\u2019importance d\u2019une \u00e9thique dans l\u2019infosph\u00e8re\u00a0: la quatri\u00e8me r\u00e9volution technologique selon Luciano Floridi<\/a>\u00a0\u00bb<\/em> \u00e9crit par ma camarade Anouk Santos pour plus de pr\u00e9cisions.<\/p>\n<p style=\"text-align: justify\"><a href=\"#_ftnref2\" name=\"_ftn2\">[2]<\/a> Il s\u2019agit de la d\u00e9finition de l\u2019information selon Luciano Floridi (2011)\u00a0: \u00ab\u00a0<em>well-formed, meaningful and truthful data<\/em>\u00a0\u00bb.<\/p>\n<p style=\"text-align: justify\"><a href=\"#_ftnref3\" name=\"_ftn3\">[3]<\/a> Un zettabyte repr\u00e9sente 10<sup>21<\/sup> bytes, autrement dit 1 milliard de t\u00e9raoctet.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00ab Philosophers have relied on visual metaphors to analyse ideas and explain their theories at least since Plato. Descartes is famous for his system of axes, and Wittgenstein for his first design of truth table diagrams. Today, visualization is a &hellip; <a href=\"https:\/\/campus.hesge.ch\/blog-master-is\/de-la-necessite-de-la-visualisation-face-au-deluge-des-donnees\/\">Lire la suite\u00ad\u00ad<\/a><\/p>\n","protected":false},"author":6,"featured_media":197,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15,12],"tags":[25,28,32,27,33,26,30,35,42,31,29,34,37],"class_list":["post-175","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-information-donnees","category-reflexion-is","tag-big-data","tag-donnees","tag-heg-geneve","tag-information","tag-knowledge","tag-luciano-floridi","tag-master-is","tag-min-chen","tag-rdf","tag-sciences-de-linformation","tag-seminaire","tag-visualisation-de-linformation","tag-zettabyte"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>De la n\u00e9cessit\u00e9 de la visualisation face au d\u00e9luge des donn\u00e9es<\/title>\n<meta name=\"description\" content=\"Julien A. 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