{"id":5470,"date":"2022-08-10T17:39:00","date_gmt":"2022-08-10T15:39:00","guid":{"rendered":"https:\/\/geopard.tech\/?p=5470"},"modified":"2026-09-15T21:38:40","modified_gmt":"2026-09-15T19:38:40","slug":"quest-ce-que-lindice-de-vegetation-par-difference-normalisee-ndvi","status":"publish","type":"post","link":"https:\/\/geopard.tech\/fr\/blog\/what-is-ndvi-normalized-difference-vegetation-index\/","title":{"rendered":"L'indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) facilite la vie des agriculteurs"},"content":{"rendered":"L'indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) est une mesure couramment utilis\u00e9e pour quantifier la densit\u00e9 et la sant\u00e9 de la v\u00e9g\u00e9tation. Ses valeurs vont de -1 \u00e0 1. Les valeurs n\u00e9gatives indiquent la pr\u00e9sence d'eau ou de sol nu, les valeurs proches de z\u00e9ro indiquent une v\u00e9g\u00e9tation clairsem\u00e9e, et les valeurs plus \u00e9lev\u00e9es indiquent une v\u00e9g\u00e9tation plus dense et plus saine.\r\n<h2>Qu'est-ce que l'indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) ?<\/h2>\r\nIl s&#039;agit d&#039;une m\u00e9thode qui calcule la diff\u00e9rence entre la quantit\u00e9 de lumi\u00e8re rouge re\u00e7ue par la v\u00e9g\u00e9tation et la quantit\u00e9 de lumi\u00e8re proche infrarouge fortement r\u00e9fl\u00e9chie par celle-ci. L&#039;objectif de cette m\u00e9thode est de fournir une analyse quantitative de l&#039;\u00e9tat de la v\u00e9g\u00e9tation. Sa valeur se situe toujours entre -1 et +1. Cependant, il n&#039;existe pas de distinction nette entre les diff\u00e9rents types de couverture terrestre. Si la somme des valeurs est inf\u00e9rieure \u00e0 z\u00e9ro, il est fort probable que la substance en question soit de l&#039;eau. Si vous obtenez un score NDVI tr\u00e8s proche de 1, il y a de fortes chances qu&#039;il s&#039;agisse simplement d&#039;un amas de feuilles vertes tr\u00e8s serr\u00e9es. Cela est particuli\u00e8rement vrai si les feuilles sont tr\u00e8s denses. Les feuilles vertes ont une valeur plus \u00e9lev\u00e9e que les feuilles rouges, ce qui explique ce r\u00e9sultat. Imaginez un instant que cet indice soit tr\u00e8s proche de z\u00e9ro. Dans une telle situation, il n&#039;y a pratiquement aucune chance que des feuilles, quelles qu&#039;elles soient, subsistent, et la r\u00e9gion pourrait m\u00eame \u00eatre urbanis\u00e9e. L&#039;indicateur de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) est l&#039;indice utilis\u00e9 par les analystes dans ce domaine. <a href=\"https:\/\/geopard.tech\/fr\/blog\/types-de-teledetection-en-agriculture\/\">t\u00e9l\u00e9d\u00e9tection<\/a> la plupart du temps.\r\n<h2>Pourquoi l'indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e est-il utile ?<\/h2>\r\nIl existe un grand nombre d'indices de v\u00e9g\u00e9tation diff\u00e9rents, et la grande majorit\u00e9 d'entre eux sont comparables les uns aux autres. Cependant, c'est celui qui est utilis\u00e9 le plus souvent et le plus largement, et il pr\u00e9sente \u00e9galement un avantage essentiel, \u00e0 savoir une haute r\u00e9solution des images qui sont d\u00e9riv\u00e9es de l'indice de v\u00e9g\u00e9tation. <a href=\"https:\/\/help.geopard.tech\/web\/satellitemonitor\/\">donn\u00e9es satellitaires<\/a>.Dans ce genre de situation, on peut utiliser des canaux d&#039;une r\u00e9solution de dix m\u00e8tres pour d\u00e9terminer l&#039;indice NDVI. Il faut savoir qu&#039;un pixel correspond \u00e0 une surface de dix m\u00e8tres sur dix. En revanche, la r\u00e9solution de l&#039;indice utilisant des canaux de lumi\u00e8re suppl\u00e9mentaires, notamment le rouge, peut atteindre vingt m\u00e8tres, un pixel correspondant alors \u00e0 une surface de vingt m\u00e8tres sur vingt.\r\n<h2>Comment le NDVI est-il calcul\u00e9 ?<\/h2>\r\nIl peut \u00eatre d\u00e9termin\u00e9 \u00e0 l'aide de la proc\u00e9dure math\u00e9matique simple suivante, qui convertit les informations satellitaires brutes en indices de v\u00e9g\u00e9tation.\r\n\r\n<img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" data-attachment-id=\"5475\" data-permalink=\"https:\/\/geopard.tech\/fr\/blog\/what-is-ndvi-normalized-difference-vegetation-index\/74-2-min\/\" data-orig-file=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?fit=2400%2C1300&amp;ssl=1\" data-orig-size=\"2400,1300\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Normalized Difference Vegetation Index formula\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?fit=1024%2C555&amp;ssl=1\" class=\"wp-image-5475 aligncenter\" src=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=810%2C439&#038;ssl=1\" alt=\"Formule de l&#039;indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e\" width=\"810\" height=\"439\" srcset=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=1024%2C555&amp;ssl=1 1024w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=300%2C163&amp;ssl=1 300w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=768%2C416&amp;ssl=1 768w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=1536%2C832&amp;ssl=1 1536w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=2048%2C1109&amp;ssl=1 2048w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?resize=1200%2C650&amp;ssl=1 1200w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.2-min.jpg?w=1620&amp;ssl=1 1620w\" sizes=\"(max-width: 810px) 100vw, 810px\" \/>\r\n\r\nL&#039;\u00e9quation g\u00e9n\u00e8re un nombre unique repr\u00e9sentatif qui int\u00e8gre les informations accessibles dans les bandes rouge et proche infrarouge (NIR). Pour ce faire, elle soustrait la r\u00e9flectance dans la bande spectrale rouge de celle dans la bande NIR. Le r\u00e9sultat est ensuite divis\u00e9 par la r\u00e9flectance totale des longueurs d&#039;onde rouge et NIR. L&#039;indice NDVI est toujours positif ou n\u00e9gatif. De plus, une valeur comprise entre -1 et 0 indique une plante morte ou des \u00e9l\u00e9ments inorganiques comme des pierres, des routes ou des b\u00e2timents. En revanche, pour les plantes vivantes, sa valeur varie de 0 \u00e0 1, 1 repr\u00e9sentant la plante la plus saine et 0 la plus malade. Il est possible d&#039;attribuer une valeur unique \u00e0 chaque pixel d&#039;une image, qu&#039;il repr\u00e9sente une simple feuille ou un champ de bl\u00e9 de 200 hectares.\r\n<h2>Comment utiliser l'indice de v\u00e9g\u00e9tation diff\u00e9rentiel normalis\u00e9 ?<\/h2>\r\n\u00c0 juste titre, il est d\u00e9sormais utilis\u00e9 dans de nombreux domaines de recherche. Par exemple, il est mis \u00e0 profit en agriculture pour l&#039;agriculture de pr\u00e9cision et l&#039;\u00e9valuation de la biomasse. Il est \u00e9galement employ\u00e9 par les forestiers pour \u00e9valuer les ressources foresti\u00e8res et l&#039;indice de surface foliaire (LAI). De plus, la NASA le consid\u00e8re comme un indicateur fiable de la pr\u00e9sence de s\u00e9cheresse. Le NDVI relatif et la densit\u00e9 de v\u00e9g\u00e9tation sont tous deux plus faibles dans les zones o\u00f9 l&#039;eau fait obstacle \u00e0 l&#039;implantation de la v\u00e9g\u00e9tation. En effet, l&#039;eau emp\u00eache les racines des plantes de s&#039;enfoncer profond\u00e9ment dans le sol. Il comprend, ainsi que d&#039;autres types de <a href=\"https:\/\/geopard.tech\/fr\/blog\/types-de-teledetection-en-agriculture\/\">t\u00e9l\u00e9d\u00e9tection<\/a>, En r\u00e9alit\u00e9, il est possible de l'utiliser de diff\u00e9rentes mani\u00e8res.\r\n<h2>Que peut nous apprendre le NDVI sur les plantes ?<\/h2>\r\nIl est essentiel de bien comprendre que la diff\u00e9rence normalis\u00e9e <a href=\"https:\/\/geopard.tech\/fr\/blog\/les-indices-de-vegetation-comment-sont-ils-utilises-en-agriculture-de-precision\/\">Indice de v\u00e9g\u00e9tation<\/a> L&#039;indice NDVI n&#039;est qu&#039;une indication de l&#039;\u00e9tat de sant\u00e9 de la plante et ne fournit aucune information sur les causes d&#039;un probl\u00e8me donn\u00e9. Il s&#039;agit davantage d&#039;une expression que d&#039;un reflet direct de la r\u00e9alit\u00e9 sur le terrain. Examinons trois applications de l&#039;indice NDVI pour l&#039;analyse de terrain\u00a0:\r\n\r\n<strong>Quand une nouvelle saison commence<\/strong>\r\n\r\nElle permet de comprendre la r\u00e9sistance de la plante \u00e0 l'hiver et la fa\u00e7on dont elle a r\u00e9ussi \u00e0 survivre.\r\n<ul>\r\n \t<li>Si sa valeur est inf\u00e9rieure \u00e0 0,15, il est probable que toutes les plantes de cette section du champ ont p\u00e9ri. En r\u00e8gle g\u00e9n\u00e9rale, ces chiffres se rapportent au sol labour\u00e9 sans aucune plante.<\/li>\r\n \t<li>Un autre exemple de chiffre faible est 0,15-0,2. Il pourrait sugg\u00e9rer que les plantes ont commenc\u00e9 \u00e0 se pr\u00e9parer \u00e0 l'hiver au d\u00e9but de la p\u00e9riode ph\u00e9nologique, avant la phase de labourage.<\/li>\r\n \t<li>Un r\u00e9sultat compris entre 0,2 et 0,3 est satisfaisant. Les plantes ont probablement progress\u00e9 jusqu'au stade du labour et ont retrouv\u00e9 leur \u00e9tat v\u00e9g\u00e9tatif.0.3-<\/li>\r\n \t<li>0,5 est une valeur convenable. Cependant, il est important de se rappeler que des valeurs de NDVI plus \u00e9lev\u00e9es sugg\u00e8rent que les plantes ont hivern\u00e9 \u00e0 un stade ph\u00e9nologique plus avanc\u00e9. Supposons que l'image satellite ait \u00e9t\u00e9 prise avant que la v\u00e9g\u00e9tation ne reprenne sa forme normale. Dans ce cas, il est important d'analyser la zone apr\u00e8s que la v\u00e9g\u00e9tation a repris sa forme normale.<\/li>\r\n \t<li>Un chiffre sup\u00e9rieur \u00e0 0,5 indique une anomalie durant la phase post-hivernale. Il est recommand\u00e9 de v\u00e9rifier cette zone de terrain.<\/li>\r\n<\/ul>\r\nEn r\u00e9sum\u00e9, si vous remarquez que les valeurs obtenues sont sensiblement diff\u00e9rentes de la norme, vous devez proc\u00e9der \u00e0 une inspection de la partie concern\u00e9e du champ. Un \u00e9cart important par rapport \u00e0 la norme est n\u00e9cessaire pour que les valeurs soient consid\u00e9r\u00e9es comme anormales dans une zone donn\u00e9e.\r\n\r\n<strong>Quand la saison est au milieu<\/strong>\r\n\r\nL&#039;utilisation de cet indice peut s&#039;av\u00e9rer utile pour mieux comprendre le d\u00e9veloppement des plantes. Imaginons que les valeurs se situent entre faible et \u00e9lev\u00e9 (0,5-0,85). Il est fort probable que cette partie de la zone ne rencontre actuellement aucun probl\u00e8me majeur. Si l&#039;indice reste inf\u00e9rieur \u00e0 la normale, il peut y avoir des probl\u00e8mes tels qu&#039;une carence en eau ou en nutriments du sol. Toutefois, il est n\u00e9cessaire de mener votre propre enqu\u00eate sur cette zone. Nous g\u00e9n\u00e9rons <a href=\"https:\/\/geopard.tech\/fr\/zones-de-gestion-cartes-vra\/\">cartes pour l'application de taux variables (VRA)<\/a> Nous utilisons l&#039;indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) pour d\u00e9terminer les besoins en azote. Nous identifions les r\u00e9gions en fonction de l&#039;indice de v\u00e9g\u00e9tation, du plus faible au plus \u00e9lev\u00e9. Ensuite, il revient \u00e0 chaque agriculteur de d\u00e9terminer la quantit\u00e9 d&#039;engrais n\u00e9cessaire. Voici la m\u00e9thode la plus efficace pour l&#039;application d&#039;azote\u00a0:\r\n<ul>\r\n \t<li>Supposons que l'indice de v\u00e9g\u00e9tation de la r\u00e9gion soit \u00e9lev\u00e9. Dans ce cas, la dose d'engrais recommand\u00e9e doit \u00eatre r\u00e9duite \u00e0 10 et 30 % de la dose habituelle.<\/li>\r\n \t<li>Si l'indice de v\u00e9g\u00e9tation se situe autour de la moyenne, la dose d'engrais recommand\u00e9e doit \u00eatre augment\u00e9e de 20 \u00e0 25 % de la quantit\u00e9 habituelle.<\/li>\r\n \t<li>Si l'indice de v\u00e9g\u00e9tation est faible, il faut d'abord en d\u00e9terminer les raisons.<\/li>\r\n<\/ul>\r\nPour reconstituer les <a href=\"https:\/\/geopard.tech\/fr\/donnees-de-rendement\/\">rendement agricole<\/a>, nous utilisons \u00e9galement cet indice. Avec ces donn\u00e9es, nous produisons des cartes qui peuvent \u00eatre utilis\u00e9es pour l'application variable d'engrais potassiques et phosphat\u00e9s.\r\n\r\n<strong>Lorsque la saison est termin\u00e9e<\/strong>\r\n\r\nL'indice NDVI est un outil utile pour d\u00e9terminer si les champs sont pr\u00eats \u00e0 \u00eatre r\u00e9colt\u00e9s ; plus l'indice est bas, plus une partie de la zone est proche du stade o\u00f9 elle est pr\u00eate \u00e0 \u00eatre r\u00e9colt\u00e9e. Dans ce sc\u00e9nario, une valeur de l'indice inf\u00e9rieure \u00e0 0,25 serait id\u00e9ale.\r\n\r\n<img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"5476\" data-permalink=\"https:\/\/geopard.tech\/fr\/blog\/what-is-ndvi-normalized-difference-vegetation-index\/74-3-min-1\/\" data-orig-file=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?fit=2400%2C1300&amp;ssl=1\" data-orig-size=\"2400,1300\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"What can NDVI tell us about plants\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?fit=1024%2C555&amp;ssl=1\" class=\"wp-image-5476 aligncenter\" src=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=810%2C439&#038;ssl=1\" alt=\"L&#039;indice NDVI est un outil utile pour d\u00e9terminer si les champs sont pr\u00eats \u00e0 \u00eatre r\u00e9colt\u00e9s.\" width=\"810\" height=\"439\" srcset=\"https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=1024%2C555&amp;ssl=1 1024w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=300%2C163&amp;ssl=1 300w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=768%2C416&amp;ssl=1 768w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=1536%2C832&amp;ssl=1 1536w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=2048%2C1109&amp;ssl=1 2048w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?resize=1200%2C650&amp;ssl=1 1200w, https:\/\/i0.wp.com\/geopard.tech\/wp-content\/uploads\/2022\/07\/74.3-min-1.jpg?w=1620&amp;ssl=1 1620w\" sizes=\"(max-width: 810px) 100vw, 810px\" \/>\r\n\r\nL&#039;indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) est un calcul math\u00e9matique effectu\u00e9 pixel par pixel sur une image \u00e0 l&#039;aide d&#039;outils SIG (Syst\u00e8me d&#039;Information G\u00e9ographique). Calcul\u00e9 en comparant les quantit\u00e9s de lumi\u00e8re rouge et infrarouge proche absorb\u00e9es et r\u00e9fl\u00e9chies par la plante, il mesure son \u00e9tat de sant\u00e9 g\u00e9n\u00e9ral. Le NDVI peut \u00eatre utilis\u00e9 pour \u00e9tudier les terres du monde entier, ce qui le rend id\u00e9al pour les \u00e9tudes de terrain cibl\u00e9es et la surveillance de la v\u00e9g\u00e9tation \u00e0 l&#039;\u00e9chelle nationale ou mondiale. Gr\u00e2ce au NDVI, nous obtenons une analyse imm\u00e9diate des parcelles, permettant aux agriculteurs d&#039;optimiser le potentiel de production des zones, de limiter leur impact sur l&#039;environnement et d&#039;adapter leurs pratiques agricoles de pr\u00e9cision. De plus, son analyse conjointe avec d&#039;autres flux de donn\u00e9es, comme les donn\u00e9es m\u00e9t\u00e9orologiques, peut fournir des informations suppl\u00e9mentaires sur les cycles r\u00e9currents de s\u00e9cheresse, de gel ou d&#039;inondations et leurs cons\u00e9quences sur la v\u00e9g\u00e9tation.\r\n\r\n<hr \/>\r\n\r\n<h2>Questions fr\u00e9quemment pos\u00e9es<\/h2>\r\n\r\n<hr \/>\r\n\r\n<strong>1. Qu'est-ce que le NDVI sert principalement \u00e0 d\u00e9terminer ?<\/strong>\r\n\r\nIl est principalement utilis\u00e9 pour d\u00e9terminer la sant\u00e9 et la densit\u00e9 de la v\u00e9g\u00e9tation dans une zone donn\u00e9e. Cet indice est largement utilis\u00e9 en agriculture, en sylviculture et en \u00e9cologie pour surveiller la croissance de la v\u00e9g\u00e9tation, \u00e9valuer les niveaux de stress des plantes, identifier les zones de s\u00e9cheresse ou de maladie et aider \u00e0 la prise de d\u00e9cision en mati\u00e8re de gestion des cultures.\r\n\r\n<strong>2. Comment lire les images NDVI ?<\/strong>\r\n\r\nPour interpr\u00e9ter les images NDVI, il faut se r\u00e9f\u00e9rer \u00e0 l&#039;\u00e9chelle de couleurs associ\u00e9e aux valeurs de l&#039;indice. G\u00e9n\u00e9ralement, une v\u00e9g\u00e9tation dense et vigoureuse appara\u00eet en vert, tandis qu&#039;une v\u00e9g\u00e9tation moins dense ou clairsem\u00e9e appara\u00eet en jaune ou en rouge. Les teintes fonc\u00e9es peuvent indiquer des zones \u00e0 forte biomasse, tandis que les teintes claires peuvent sugg\u00e9rer une faible densit\u00e9 de v\u00e9g\u00e9tation ou la pr\u00e9sence de sol nu. La connaissance du contexte de la zone analys\u00e9e, comme le type de culture ou les conditions environnementales, peut faciliter l&#039;interpr\u00e9tation des images NDVI et permettre de prendre des d\u00e9cisions \u00e9clair\u00e9es concernant les pratiques agricoles.\n\n\n<div class=\"gp-lead\">\n<section class=\"gpx-aiband\">\n  <style>\n    .gp-lead .gpx-aiband{display:flex;align-items:center;gap:24px;flex-wrap:wrap;background:#f2f7ee;border:1px solid #d6e2c5;border-radius:14px;padding:22px 26px;margin:26px 0}\n    .gp-lead .gpx-aiband-txt{flex:1 1 380px}\n    .gp-lead .gpx-aiband-new{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.05em;color:#ffffff;background:#f76a0c;border-radius:999px;padding:3px 9px;vertical-align:3px;margin-left:10px}\n    .gp-lead .gpx-aiband h2{margin:0;font-size:1.3rem}\n    .gp-lead .gpx-aiband p{margin:8px 0 0;color:#4c6066;font-size:.98rem;line-height:1.55}\n    .gp-lead .gpx-aiband-btn{flex:0 0 auto;display:inline-flex;align-items:center;min-height:46px;background:#15701e;color:#ffffff;font-weight:600;padding:0 22px;border-radius:999px;text-decoration:none}\n    .gp-lead .gpx-aiband-btn:hover{background:#145328;color:#ffffff}\n    @media (max-width:640px){ .gp-lead .gpx-aiband{padding:18px} .gp-lead .gpx-aiband-btn{width:100%;justify-content:center} }\n  <\/style>\n  <div class=\"gpx-aiband-txt\">\n    <h2>D\u00e9couvrez l&#039;assistant IA de GeoPard<span class=\"gpx-aiband-new\">NOUVEAU<\/span><\/h2>\n    <p>L&#039;intelligence artificielle raisonn\u00e9e au service de l&#039;agriculture de pr\u00e9cision\u00a0: elle pose les bonnes questions agronomiques, pr\u00e9sente ses calculs et \u00e9labore des prescriptions valid\u00e9es \u00e0 partir de vos donn\u00e9es. Vous approuvez chaque \u00e9tape.<\/p>\n  <\/div>\n  <a class=\"gpx-aiband-btn\" href=\"https:\/\/geopard.tech\/fr\/ia\/\">Observez comment l&#039;IA pense \u2192<\/a>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>L&#039;indice de v\u00e9g\u00e9tation par diff\u00e9rence normalis\u00e9e (NDVI) est une mesure couramment utilis\u00e9e pour quantifier la densit\u00e9 et la sant\u00e9 de la v\u00e9g\u00e9tation. Ses valeurs varient de -1 \u00e0 1\u2026<\/p>","protected":false},"author":210157960,"featured_media":5474,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_eb_attr":"","content-type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"{title}\n\n{excerpt}\n\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false,"jetpack_post_was_ever_published":false},"categories":[1662,1380,1377],"tags":[1618,1619],"class_list":["post-5470","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ndvi","category-whats","category-crop-monitoring","tag-crop-monitoring","tag-normalized-difference-vegetation-index"],"acf":[],"yoast_head":"<!-- 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