{"id":15507,"date":"2025-09-16T10:00:00","date_gmt":"2025-09-16T08:00:00","guid":{"rendered":"https:\/\/www.sigterritoires.fr\/?p=15507"},"modified":"2025-09-10T15:36:47","modified_gmt":"2025-09-10T13:36:47","slug":"creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below","status":"publish","type":"post","link":"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/","title":{"rendered":"Cr\u00e9er des cartes de sensibilisation avec QGIS : l\u2019\u00e9quivalent du style Above and Below \u00bb"},"content":{"rendered":"\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenu <\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/#Cartes_de_sensibilisation_dans_QGIS\" >Cartes de sensibilisation dans QGIS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/#Le_theme_%C2%AB_Au-dessus_et_en_dessous_%C2%BB_dans_QGIS\" >Le th\u00e8me \u00ab Au-dessus et en dessous \u00bb dans QGIS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/#Quand_utiliser_cette_approche\" >Quand utiliser cette approche ?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/#Creer_le_gradient_de_couleurs_AboveAndBelow\" >Cr\u00e9er le gradient de couleurs AboveAndBelow<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/#Appliquer_cette_symbologie_a_une_couche_de_polygones\" >Appliquer cette symbologie \u00e0 une couche de polygones<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/#Expression_AboveAndBelow\" >Expression AboveAndBelow<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cartes_de_sensibilisation_dans_QGIS\"><\/span>Cartes de sensibilisation dans QGIS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lorsqu\u2019un probl\u00e8me est relativement nouveau, il est souvent utile de passer par une phase de <strong>sensibilisation<\/strong>. Les cartes jouent alors un r\u00f4le cl\u00e9 : elles permettent de r\u00e9v\u00e9ler des faits pr\u00e9occupants et d\u2019attirer l\u2019attention du public ou des d\u00e9cideurs sur un enjeu.<\/p>\n\n\n\n<p>Dans QGIS, une carte de sensibilisation efficace s\u2019appuie g\u00e9n\u00e9ralement sur une <strong>symbologie divergente<\/strong>. L\u2019id\u00e9e est de centrer la repr\u00e9sentation sur une valeur de r\u00e9f\u00e9rence (moyenne, m\u00e9diane, z\u00e9ro, objectif politique, etc.), puis de mettre en \u00e9vidence les valeurs au-dessus et en dessous de ce seuil.<\/p>\n\n\n\n<p>Une couleur vive (par ex. magenta, rouge ou bleu intense) peut \u00eatre utilis\u00e9e pour attirer imm\u00e9diatement l\u2019\u0153il sur les zones critiques.<\/p>\n\n\n\n<p>Exemple : les polygones en magenta sur une carte peuvent repr\u00e9senter les secteurs o\u00f9 le taux de pauvret\u00e9 est nettement plus \u00e9lev\u00e9 que la moyenne.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Le_theme_%C2%AB_Au-dessus_et_en_dessous_%C2%BB_dans_QGIS\"><\/span>Le th\u00e8me \u00ab Au-dessus et en dessous \u00bb dans QGIS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>L\u2019\u00e9quivalent du style <em>Above and Below<\/em> d\u2019ArcGIS Online peut \u00eatre reproduit dans QGIS avec un <strong>gradient de couleurs centr\u00e9e sur une valeur cl\u00e9<\/strong> :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>D\u00e9finir la valeur centrale<\/strong> : moyenne statistique, m\u00e9diane ou un seuil connu (par ex. z\u00e9ro, objectif de politique publique, valeur l\u00e9gale).<\/li>\n\n\n\n<li><strong>D\u00e9finir les classes hautes et basses<\/strong> : en utilisant un \u00e9cart-type, des quantiles ou des seuils personnalis\u00e9s.<\/li>\n\n\n\n<li><strong>Appliquer une palette divergente<\/strong> \u00e0 trois couleurs :\n<ul class=\"wp-block-list\">\n<li>une couleur vive pour les valeurs \u00e9lev\u00e9es,<\/li>\n\n\n\n<li>une autre pour les valeurs faibles,<\/li>\n\n\n\n<li>une couleur neutre pour les valeurs proches de la normale.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Pour les <strong>points et lignes<\/strong>, vous pouvez combiner <strong>taille proportionnelle<\/strong> et <strong>couleur divergente<\/strong> afin de mettre en \u00e9vidence non seulement l\u2019\u00e9cart par rapport \u00e0 la valeur de r\u00e9f\u00e9rence, mais aussi l\u2019importance relative de chaque entit\u00e9.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quand_utiliser_cette_approche\"><\/span>Quand utiliser cette approche ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Choisissez ce type de carte lorsque vous souhaitez <strong>ancrer la lecture autour d\u2019une valeur de r\u00e9f\u00e9rence claire<\/strong>, afin de montrer :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>quelles zones performent mieux que pr\u00e9vu,<\/li>\n\n\n\n<li>quelles zones sont en difficult\u00e9,<\/li>\n\n\n\n<li>et quelles zones se situent dans la norme.<\/li>\n<\/ul>\n\n\n\n<p> Exemple : pour des donn\u00e9es de trafic, vous pouvez mettre en \u00e9vidence les secteurs o\u00f9 le volume est <strong>sup\u00e9rieur<\/strong> ou <strong>inf\u00e9rieur<\/strong> \u00e0 la moyenne observ\u00e9e, ce qui facilite l\u2019identification des points noirs ou au contraire des r\u00e9ussites.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Creer_le_gradient_de_couleurs_AboveAndBelow\"><\/span>Cr\u00e9er le gradient de couleurs AboveAndBelow<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La palette va du vert au magenta en passant par le jaune. Pour la cr\u00e9er:<br>&#8211; copiez-collez le code suivant dans un fichier que vous nommerez aboveandbelow.xml<\/p>\n\n\n<div class='stb-container stb-style-download stb-caption-box'><div class='stb-caption'><div class='stb-logo'><img class='stb-logo__image' 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' alt='img'\/><\/div><div class='stb-caption-content'>aboveandbelow.xml <\/div><div class='stb-tool'><\/div><\/div><div class='stb-content'><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;!DOCTYPE qgis_style&gt;\n&lt;qgis_style version=\"2\"&gt;\n  &lt;symbols\/&gt;\n  &lt;colorramps&gt;\n    &lt;colorramp type=\"gradient\" name=\"AboveAndBelow\" tags=\"Colorful,AboveAndBelow\"&gt;\n      &lt;Option type=\"Map\"&gt;\n        &lt;Option value=\"69,146,21,255,hsv:0.26974999999999999,0.85304036011291673,0.57334248874647131,1\" type=\"QString\" name=\"color1\"\/&gt;\n        &lt;Option value=\"248,247,207,255,hsv:0.16225000000000001,0.16768139162279697,0.9739070725566491,1\" type=\"QString\" name=\"color2\"\/&gt;\n        &lt;Option value=\"ccw\" type=\"QString\" name=\"direction\"\/&gt;\n        &lt;Option value=\"0\" type=\"QString\" name=\"discrete\"\/&gt;\n        &lt;Option value=\"gradient\" type=\"QString\" name=\"rampType\"\/&gt;\n        &lt;Option value=\"rgb\" type=\"QString\" name=\"spec\"\/&gt;\n        &lt;Option value=\"0.504808;221,238,209,255,hsv:0.26338888888888889,0.12065308613717861,0.93389791714351111,1;rgb;ccw:0.997596;231,25,178,255,hsv:0.87608333333333333,0.89083695735103385,0.90663004501411459,1;rgb;ccw\" type=\"QString\" name=\"stops\"\/&gt;\n      &lt;\/Option&gt;\n    &lt;\/colorramp&gt;\n  &lt;\/colorramps&gt;\n  &lt;textformats\/&gt;\n  &lt;labelsettings\/&gt;\n  &lt;legendpatchshapes\/&gt;\n  &lt;symbols3d\/&gt;\n&lt;\/qgis_style&gt;\n\n<\/code><\/pre>\n\n\n\n<p><\/div><\/div>\n\n\n\n<p><strong>Ouvrez le gestionnaire de style de QGis <\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style_icon.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"311\" data-attachment-id=\"15510\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/gestionnaire_style_icon\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style_icon.jpg?fit=731%2C355&amp;ssl=1\" data-orig-size=\"731,355\" 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;1&quot;}\" data-image-title=\"gestionnaire_style_icon\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style_icon.jpg?fit=640%2C311&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style_icon.jpg?resize=640%2C311&#038;ssl=1\" alt=\"\" class=\"wp-image-15510\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style_icon.jpg?w=731&amp;ssl=1 731w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style_icon.jpg?resize=300%2C146&amp;ssl=1 300w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p>Utilisez le bouton Importer\/Exporter pour pointer sur le fichier aboveandbelow.xml et charger le gradient de couleur dans votre installation QGis.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"299\" data-attachment-id=\"15511\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/gestionnaire_style\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?fit=2381%2C1111&amp;ssl=1\" data-orig-size=\"2381,1111\" 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;1&quot;}\" data-image-title=\"gestionnaire_style\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?fit=640%2C299&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?resize=640%2C299&#038;ssl=1\" alt=\"\" class=\"wp-image-15511\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?resize=1024%2C478&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?resize=300%2C140&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?resize=768%2C358&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?resize=1536%2C717&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?resize=2048%2C956&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/gestionnaire_style.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Appliquer_cette_symbologie_a_une_couche_de_polygones\"><\/span>Appliquer cette symbologie \u00e0 une couche de polygones<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>QGis ne permet pas de d\u00e9finir directement une symbologie de type \u00ab\u00a0rampe\u00a0\u00bb \u00e9quivalente \u00e0 celle utilis\u00e9e pour les rasters, pour les couches vectorielles.<br>Mais on peut la cr\u00e9er en utilisant le type \u00ab\u00a0symbole unique\u00a0\u00bb avec un \u00ab\u00a0remplissage simple\u00a0\u00bb et en lui affectant une expression \u00e0 la couleur:<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"579\" data-attachment-id=\"15508\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/polygonramp\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?fit=2119%2C1917&amp;ssl=1\" data-orig-size=\"2119,1917\" 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=\"polygonramp\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?fit=640%2C579&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?resize=640%2C579&#038;ssl=1\" alt=\"\" class=\"wp-image-15508\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?resize=1024%2C926&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?resize=300%2C271&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?resize=768%2C695&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?resize=1536%2C1390&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?resize=2048%2C1853&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/polygonramp.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Expression_AboveAndBelow\"><\/span>Expression AboveAndBelow<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>L&rsquo;objectif est d&rsquo;appliquer le gradient de couleur \u00e0 un champ attributaire (ici <strong><em>field_name<\/em><\/strong>). Vous devrez l&rsquo;adapter en le rempla\u00e7ant par le vrai nom du champ attributaire.<\/p>\n\n\n\n<p>L&rsquo;expression calcule \u00e0 la vol\u00e9e la moyenne et l&rsquo;\u00e9cart type des valeurs pr\u00e9sentes dans field_name et ajuste le gradient en affectant la valeur 0 \u00e0 la moyenne- l&rsquo;\u00e9cart type et 1 \u00e0 la valeur moyenne+l&rsquo;\u00e9cart type.<\/p>\n\n\n<div class='stb-container stb-style-download stb-caption-box'><div class='stb-caption'><div class='stb-logo'><img class='stb-logo__image' src='data:image\/png;base64,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' alt='img'\/><\/div><div class='stb-caption-content'>aboveandbelow.xml <\/div><div class='stb-tool'><\/div><\/div><div class='stb-content'><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ramp_color('AboveAndBelow',\n                 scale_linear(\n                        \"field_name\",\n                        mean(\"field_name\") - stdev(\"field_name\"),\n                        mean(\"field_name\") + stdev(\"field_name\"),\n                        0, 1\n                    )\n                )<\/code><\/pre>\n\n\n\n<p><\/div><\/div>\n\n\n\n<p>Ceci se traduit par:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>tous les polygones ayant une valeur moyenne-\u00e9cart type ou inf\u00e9rieure, auront une couleur verte<\/li>\n\n\n\n<li>tous les polygones ayant une valeur moyenne+\u00e9cart type ou sup\u00e9rieure, auront une couleur magenta<\/li>\n\n\n\n<li>les polygones compris entre ces deux valeurs auront une couleur gradu\u00e9e<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/symb_aboveandbelow-1.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"514\" data-attachment-id=\"15513\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/creer-des-cartes-de-sensibilisation-avec-qgis-lequivalent-du-style-above-and-below\/symb_aboveandbelow-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/symb_aboveandbelow-1.jpg?fit=1918%2C1539&amp;ssl=1\" data-orig-size=\"1918,1539\" 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;1&quot;}\" data-image-title=\"symb_aboveandbelow\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/symb_aboveandbelow-1.jpg?fit=640%2C514&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/symb_aboveandbelow-1.jpg?resize=640%2C514&#038;ssl=1\" alt=\"\" class=\"wp-image-15513\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/09\/symb_aboveandbelow-1.jpg?resize=1024%2C822&amp;ssl=1 1024w, 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sensibilisation. 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