{"id":14312,"date":"2024-09-23T16:44:20","date_gmt":"2024-09-23T16:44:20","guid":{"rendered":"https:\/\/dailyai.com\/?p=14312"},"modified":"2024-09-24T08:54:06","modified_gmt":"2024-09-24T08:54:06","slug":"googles-open-buildings-project-maps-urban-expansion-across-the-global-south","status":"publish","type":"post","link":"https:\/\/dailyai.com\/fr\/2024\/09\/googles-open-buildings-project-maps-urban-expansion-across-the-global-south\/","title":{"rendered":"Le projet Open Buildings de Google cartographie l'expansion urbaine dans les pays du Sud"},"content":{"rendered":"<p><strong>Google Research a publi\u00e9 l'ensemble de donn\u00e9es temporelles Open Buildings 2.5D, un projet qui suit l'\u00e9volution des b\u00e2timents dans les pays du Sud entre 2016 et 2023.<\/strong><\/p>\n<p>Cet ensemble de donn\u00e9es exceptionnellement d\u00e9taill\u00e9es offre une vision dynamique de l'urbanisation, ann\u00e9e par ann\u00e9e. Il rend compte de la construction, de la croissance et de la transformation des b\u00e2timents dans des r\u00e9gions o\u00f9 de telles donn\u00e9es ont longtemps \u00e9t\u00e9 rares ou inexistantes.<\/p>\n<p><span style=\"font-weight: 400;\">John Quinn, ing\u00e9nieur logiciel chez Google Research, explique <\/span><span style=\"font-weight: 400;\">pourquoi <a href=\"https:\/\/research.google\/blog\/open-buildings-25d-temporal-dataset-tracks-building-changes-across-the-global-south\/\" target=\"_blank\" rel=\"noopener\">le projet<\/a><\/span><span style=\"font-weight: 400;\"> est important : \"Ne pas savoir o\u00f9 se trouvent les b\u00e2timents est un gros probl\u00e8me pour de nombreuses raisons pratiques. Si vous cr\u00e9ez des services ou des campagnes de vaccination ou si vous secourez des personnes en cas d'urgence, c'est un probl\u00e8me\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La principale avanc\u00e9e de cet outil r\u00e9side dans sa capacit\u00e9 \u00e0 extraire des informations \u00e0 haute r\u00e9solution \u00e0 partir d'images satellite Sentinel-2 \u00e0 faible r\u00e9solution.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">En analysant jusqu'\u00e0 32 images d\u00e9cal\u00e9es dans le temps d'un m\u00eame lieu, l'IA peut d\u00e9tecter des structures bien plus petites qu'un seul pixel.<\/span><\/p>\n<figure id=\"attachment_14313\" aria-describedby=\"caption-attachment-14313\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-14313 size-full\" src=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/09\/OB_Temporal_Img2.width-800.png\" alt=\"IA Google\" width=\"800\" height=\"374\" srcset=\"https:\/\/dailyai.com\/wp-content\/uploads\/2024\/09\/OB_Temporal_Img2.width-800.png 800w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/09\/OB_Temporal_Img2.width-800-300x140.png 300w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/09\/OB_Temporal_Img2.width-800-768x359.png 768w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/09\/OB_Temporal_Img2.width-800-18x8.png 18w, https:\/\/dailyai.com\/wp-content\/uploads\/2024\/09\/OB_Temporal_Img2.width-800-60x28.png 60w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-14313\" class=\"wp-caption-text\">Densit\u00e9 des b\u00e2timents en 2023 sur la base des donn\u00e9es temporelles Open Buildings 2.5D. Source de donn\u00e9es : <a href=\"https:\/\/research.google\/blog\/open-buildings-25d-temporal-dataset-tracks-building-changes-across-the-global-south\/\">Google<\/a>.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Au-del\u00e0 de la d\u00e9tection, le syst\u00e8me estime la hauteur des b\u00e2timents avec une pr\u00e9cision remarquable, de l'ordre de 1,5 m\u00e8tre en moyenne. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les images satellites plates sont ainsi transform\u00e9es en donn\u00e9es riches et multicouches, offrant aux urbanistes et aux organisations humanitaires un instrument puissant pour comprendre la densit\u00e9 de la population et les besoins en ressources.<\/span><\/p>\n<h2><strong>Cartographie du Sud mondial<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Le terme \"Sud mondial\" d\u00e9signe g\u00e9n\u00e9ralement les pays en d\u00e9veloppement d'Afrique, d'Asie, d'Am\u00e9rique latine et des Cara\u00efbes.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ces r\u00e9gions, qui abritent la majorit\u00e9 de la population mondiale, sont souvent confront\u00e9es \u00e0 des d\u00e9fis en mati\u00e8re de fourniture de soins de sant\u00e9 de qualit\u00e9, de d\u00e9veloppement urbain, de conservation de l'environnement et de gestion des ressources.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Abdoulaye Diack, gestionnaire du projet, a d\u00e9clar\u00e9 : \"Nous voulons que les personnes du Sud qui prennent des d\u00e9cisions politiques disposent des m\u00eames outils que celles du Nord\".\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">L'ensemble des donn\u00e9es trouve d\u00e9j\u00e0 des applications pratiques. En Ouganda, le <\/span><a href=\"https:\/\/sunbird.ai\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">non lucratif Sunbird AI<\/span><\/a><span style=\"font-weight: 400;\"> exploite ces donn\u00e9es pour des projets d'\u00e9lectrification rurale.<\/span><\/p>\n<p><a href=\"https:\/\/www.worldpop.org\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">WorldPop<\/span><\/a><span style=\"font-weight: 400;\">bas\u00e9 \u00e0 l'universit\u00e9 de Southampton, l'utilise pour affiner les estimations de la population mondiale, une information essentielle pour planifier toutes sortes d'activit\u00e9s, des campagnes de vaccination aux interventions en cas de catastrophe.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le directeur de WorldPop, le professeur Andrew Tatem, explique pourquoi ces donn\u00e9es sont importantes : \"Il est essentiel de comprendre o\u00f9 vivent les gens pour s'assurer que les ressources sont r\u00e9parties \u00e9quitablement et que personne n'est laiss\u00e9 pour compte dans la fourniture de services tels que les soins de sant\u00e9\".<\/span><\/p>\n<p>L'IA am\u00e9liore la cartographie par satellite et en 3D, ce qui permet d'obtenir des informations plus pr\u00e9cises et plus opportunes sur la croissance urbaine et les changements environnementaux.<\/p>\n<p><span style=\"font-weight: 400;\">Par exemple, un\u00a0<a href=\"https:\/\/www.ayadata.ai\/case-study\/environmental-change-detection-using-high-resolution-satellite-imagery\/\" target=\"_blank\" rel=\"noopener\">projet r\u00e9cent d'Aya Data<\/a> au Ghana e<\/span><span style=\"font-weight: 400;\">a utilis\u00e9 l'IA pour analyser des milliers d'images satellites de l'Am\u00e9rique du Sud et suivre l'\u00e9volution des for\u00eats, des zones urbaines et des terres agricoles sur plusieurs ann\u00e9es.<\/span><\/p>\n<p>La capacit\u00e9 de l'IA \u00e0 d\u00e9tecter des changements subtils, tels que des signes pr\u00e9coces de d\u00e9forestation ou de nouveaux d\u00e9veloppements, permet d'\u00e9clairer les politiques agricoles et de conservation dans le monde r\u00e9el.<\/p>\n<p>Au-del\u00e0 de l'observation des changements \u00e0 long terme de l'environnement, l'IA permet aux chercheurs de d\u00e9tecter et de r\u00e9pondre \u00e0 des menaces telles que l'exploitation foresti\u00e8re ill\u00e9gale, le braconnage des animaux sauvages et les changements non autoris\u00e9s dans l'utilisation des terres, visibles \u00e0 partir d'images satellitaires.<\/p>\n<p><span style=\"font-weight: 400;\">Google admet que son ensemble de donn\u00e9es a des limites. Une couverture nuageuse persistante peut emp\u00eacher la collecte de donn\u00e9es dans certaines des r\u00e9gions les plus humides du monde, et de tr\u00e8s petites structures peuvent \u00e9galement \u00e9chapper \u00e0 la d\u00e9tection.\u00a0<\/span><\/p>\n<p>N\u00e9anmoins, l'ensemble de donn\u00e9es temporelles 2.5D d'Open Buildings est un excellent exemple de la puissante synergie entre la d\u00e9mocratisation des donn\u00e9es et l'IA.<\/p>\n<p>En d\u00e9mocratisant l'acc\u00e8s \u00e0 des informations g\u00e9ospatiales complexes, il ouvre la voie \u00e0 une planification urbaine plus \u00e9quitable, \u00e0 la pr\u00e9paration aux catastrophes et au d\u00e9veloppement durable \u00e0 l'\u00e9chelle mondiale.<\/p>","protected":false},"excerpt":{"rendered":"<p>Google Research a publi\u00e9 l'ensemble de donn\u00e9es temporelles Open Buildings 2.5D, un projet qui suit l'\u00e9volution des b\u00e2timents dans les pays du Sud entre 2016 et 2023. Cet ensemble de donn\u00e9es exceptionnellement d\u00e9taill\u00e9 offre une vision dynamique de l'urbanisation, ann\u00e9e par ann\u00e9e. Il rend compte de la construction, de la croissance et de la transformation des b\u00e2timents dans des r\u00e9gions o\u00f9 de telles donn\u00e9es ont longtemps \u00e9t\u00e9 rares ou inexistantes. John Quinn, ing\u00e9nieur logiciel chez Google Research, explique l'importance du projet : \"Ne pas savoir o\u00f9 se trouvent les b\u00e2timents est un gros probl\u00e8me pour de nombreuses raisons pratiques. Si vous cr\u00e9ez des services ou des campagnes de vaccination ou si vous secourez des gens apr\u00e8s une urgence, c'est un probl\u00e8me\". L'outil<\/p>","protected":false},"author":2,"featured_media":14319,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[88],"tags":[102],"class_list":["post-14312","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethics","tag-google"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Google&#039;s Open Buildings project maps urban expansion across the Global South | DailyAI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dailyai.com\/fr\/2024\/09\/googles-open-buildings-project-maps-urban-expansion-across-the-global-south\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Google&#039;s Open Buildings project maps urban expansion across the Global South | DailyAI\" \/>\n<meta property=\"og:description\" content=\"Google Research has released the Open Buildings 2.5D Temporal Dataset, a project that tracks building changes across the Global South from 2016 to 2023. 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