﻿{"id":15937,"date":"2025-11-19T10:00:00","date_gmt":"2025-11-19T09:00:00","guid":{"rendered":"https:\/\/www.sigterritoires.fr\/?p=15937"},"modified":"2025-11-11T17:38:26","modified_gmt":"2025-11-11T16:38:26","slug":"estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp","status":"publish","type":"post","link":"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/","title":{"rendered":"Estudio de los corales con Sentinel-2 Deep Resolution 3 (S2DR3) con QGis y SCP"},"content":{"rendered":"\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">Tras el art\u00edculo \u00abC\u00f3mo aumentar la resoluci\u00f3n de las im\u00e1genes Sentinel 2 de 10 a 1 m\u00bb y \u00abUtilizar S2DR3 en Google Colab para el estudio de los corales en Mauricio\u00bb, veamos aqu\u00ed c\u00f3mo explotar las capas de superresoluci\u00f3n en QGis con el complemento SCP.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\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_85 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\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Carga_de_datos_en_QGIS\" >Carga de datos en QGIS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Bandas_Sentinel-2_y_longitudes_de_onda\" >Bandas Sentinel-2 y longitudes de onda<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Aplicaciones_clave_relacionadas_con_los_corales\" >Aplicaciones clave relacionadas con los corales<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#2_Composiciones_RGB_para_visualizar_los_arrecifes\" >2. Composiciones RGB para visualizar los arrecifes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#3_Bandas_utiles_para_los_corales\" >3. Bandas \u00fatiles para los corales<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#4_Indices_espectrales_recomendados\" >4. \u00cdndices espectrales recomendados<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Ejemplo_de_profundidad_relativa\" >Ejemplo de profundidad relativa<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Ejemplo_Deteccion_de_corales_vivos_B2_B3_B4_%E2%80%93_Sentinel-2\" >Ejemplo: Detecci\u00f3n de corales vivos (B2, B3, B4 \u2013 Sentinel-2)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Objetivo\" >Objetivo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Bandas_necesarias\" >Bandas necesarias<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#2Indice_espectral_%C2%ABCoral_Index%C2%BB_CI\" >2.\u00cdndice espectral \u00abCoral Index\u00bb (CI)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Calculo_del_indice_en_QGIS_SCP\" >C\u00e1lculo del \u00edndice en QGIS \/ SCP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Filtrado_3%C3%973_reduccion_del_ruido\" >Filtrado 3\u00d73 (reducci\u00f3n del ruido)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Visualizacion\" >Visualizaci\u00f3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Interpretacion_sobre_el_terreno_Blue_Bay_%E2%80%93_Ile_aux_Aigrettes\" >Interpretaci\u00f3n sobre el terreno (Blue Bay \u2013 \u00cele aux Aigrettes)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Comparacion_entre_Sentinel-2_original_y_S2DR3\" >Comparaci\u00f3n entre Sentinel-2 original y S2DR3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Consejos_para_un_analisis_fiable\" >Consejos para un an\u00e1lisis fiable<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.sigterritoires.fr\/index.php\/es\/estudio-de-los-corales-con-sentinel-2-deep-resolution-3-s2dr3-con-qgis-y-scp\/#Ejemplo_de_flujo_de_trabajo_SCP_resumen\" >Ejemplo de flujo de trabajo SCP (resumen)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Carga_de_datos_en_QGIS\"><\/span>Carga de datos en QGIS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Abra QGIS \u2192 men\u00fa Complementos \u2192 Complemento de clasificaci\u00f3n semiautom\u00e1tica (SCP).<\/li>\n\n\n\n<li>En el panel SCP \u2192 pesta\u00f1a Preprocesamiento, a\u00f1ada el archivo GeoTIFF procedente de Colab:<br>Ruta: \/MyDrive\/Sentinel2_Coraux_S2DR3\/output\/\u2026_MS.tif (contiene todas las bandas)<\/li>\n\n\n\n<li>Haga clic en \u00abBand set\u00bb \u2192 \u00abCreate band set\u00bb y, a continuaci\u00f3n, a\u00f1ada todas las bandas S2DR3 (B0 a B9).<\/li>\n\n\n\n<li>Compruebe que la resoluci\u00f3n es de 1 m y que las bandas est\u00e1n alineadas correctamente.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"302\" data-attachment-id=\"15858\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/scp_sd3\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?fit=2560%2C1207&amp;ssl=1\" data-orig-size=\"2560,1207\" 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=\"scp_sd3\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?fit=640%2C302&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3.jpg?resize=640%2C302&#038;ssl=1\" alt=\"\" class=\"wp-image-15858\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?resize=1024%2C483&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?resize=300%2C141&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?resize=768%2C362&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?resize=1536%2C724&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?resize=2048%2C965&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_sd3-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">A continuaci\u00f3n se muestra la tabla completa de bandas Sentinel-2 con sus longitudes de onda centrales y resoluciones nativas (antes de la superresoluci\u00f3n S2DR3).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bandas_Sentinel-2_y_longitudes_de_onda\"><\/span>Bandas Sentinel-2 y longitudes de onda<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Banda<\/th><th>Nombre\/Descripci\u00f3n<\/th><th>Longitud de onda (nm)<\/th><th>Resoluci\u00f3n nativa (m)<\/th><th>Uso t\u00edpico<\/th><\/tr><\/thead><tbody><tr><td><strong>B1<\/strong><\/td><td>Costera\/Aerosoles<\/td><td>443<\/td><td>60<\/td><td>Estudio de la atm\u00f3sfera, aguas costeras poco profundas<\/td><\/tr><tr><td><strong>B2<\/strong><\/td><td>Azul<\/td><td>490<\/td><td>10<\/td><td>Aguas claras, batimetr\u00eda, salud de los corales<\/td><\/tr><tr><td><strong>B3<\/strong><\/td><td>Verde<\/td><td>560<\/td><td>10<\/td><td>V\u00e9g\u00e9tation aquatique, coraux, herbiers<\/td><\/tr><tr><td><strong>B4<\/strong><\/td><td>Rojo<\/td><td>665<\/td><td>10<\/td><td>Detecci\u00f3n de clorofila, corales estresados<\/td><\/tr><tr><td><strong>B5<\/strong><\/td><td>Red Edge 1<\/td><td>705<\/td><td>20<\/td><td>Transici\u00f3n rojo\/NIR, vegetaci\u00f3n<\/td><\/tr><tr><td><strong>B6<\/strong><\/td><td>Red Edge 2<\/td><td>740<\/td><td>20<\/td><td>Salud de la vegetaci\u00f3n, turbidez <\/td><\/tr><tr><td><strong>B7<\/strong><\/td><td>Red Edge 3<\/td><td>783<\/td><td>20<\/td><td>An\u00e1lisis detallado de la vegetaci\u00f3n costera <\/td><\/tr><tr><td><strong>B8<\/strong><\/td><td>NIR (infrarrojo cercano)<\/td><td>842<\/td><td>10<\/td><td>Detecci\u00f3n de vegetaci\u00f3n, profundidad (agua clara)<\/td><\/tr><tr><td><strong>B8A<\/strong><\/td><td>Red Edge 4<\/td><td>865<\/td><td>20<\/td><td>Mejora de los contrastes entre el suelo y la vegetaci\u00f3n<\/td><\/tr><tr><td><strong>B9<\/strong><\/td><td>Banda de vapor de agua<\/td><td>945<\/td><td>60<\/td><td>Correcci\u00f3n atmosf\u00e9rica (vapor de agua)<\/td><\/tr><tr><td><strong>B10<\/strong><\/td><td>Cirros<\/td><td>1375<\/td><td>60<\/td><td>Detecci\u00f3n de cirros<\/td><\/tr><tr><td><strong>B11<\/strong><\/td><td>SWIR 1 (infrarrojo corto)<\/td><td>1610<\/td><td>20<\/td><td>Sedimentos, humedad, turbidez<\/td><\/tr><tr><td><strong>B12<\/strong><\/td><td>SWIR 2 (infrarrojo corto)<\/td><td>2190<\/td><td>20<\/td><td>Discriminaci\u00f3n de suelos, alta turbidez<\/td><\/tr><\/tbody><\/table><\/figure>\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=\"Aplicaciones_clave_relacionadas_con_los_corales\"><\/span>Aplicaciones clave relacionadas con los corales<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tema Bandas principales Explicaci\u00f3n Detecci\u00f3n de corales vivos B2, B3, B4 Los corales reflejan m\u00e1s en el verde que en el azul, pero absorben mucho en el rojo. Praderas marinas y algas B3, B5, B6 El borde rojo revela los pigmentos clorof\u00edlicos de las praderas marinas. Batimetr\u00eda (profundidad relativa) B2\/B3, B3\/B4 Cuanto mayor es la profundidad, m\u00e1s r\u00e1pidamente disminuye la reflectancia azul. Turbidez\/sedimentos B8, B11, B12 El infrarrojo es absorbido en gran medida por el agua, pero reflejado bien por las part\u00edculas en suspensi\u00f3n.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tema<\/th><th>Bandas principales<\/th><th>Explicaci\u00f3n <\/th><\/tr><\/thead><tbody><tr><td><strong>Detecci\u00f3n de corales vivos<\/strong><\/td><td>B2, B3, B4<\/td><td>Los corales reflejan m\u00e1s en el verde que en el azul, pero absorben mucho en el rojo. <\/td><\/tr><tr><td><strong>Praderas marinas y algas<\/strong><\/td><td>B3, B5, B6<\/td><td>El Red Edge revela los pigmentos clorof\u00edlicos de las praderas marinas.<\/td><\/tr><tr><td><strong>Batimetr\u00eda (profundidad relativa) <\/strong><\/td><td>B2\/B3, B3\/B4<\/td><td>Cuanto mayor es la profundidad, m\u00e1s r\u00e1pidamente disminuye la reflectancia azul<\/td><\/tr><tr><td><strong>Turbidez\/sedimentos<\/strong><\/td><td>B8, B11, B12<\/td><td>El infrarrojo es absorbido en gran medida por el agua, pero reflejado bien por las part\u00edculas en suspensi\u00f3n.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Composiciones_RGB_para_visualizar_los_arrecifes\"><\/span>2. Composiciones RGB para visualizar los arrecifes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tema<\/th><th>Bandas (R-G-B)<\/th><th>Efecto visual principal<\/th><\/tr><\/thead><tbody><tr><td><strong>True color (natural)<\/strong><\/td><td>B4-B3-B2<\/td><td>Vista realista del agua y los fondos.<\/td><\/tr><tr><td><strong>Litoral \/ corales poco profundos<\/strong><\/td><td>B3-B2-B1<\/td><td>Mayor sensibilidad a las variaciones de profundidad y a las praderas marinas. <\/td><\/tr><tr><td><strong>Detecci\u00f3n de turbidez\/sedimentos<\/strong><\/td><td>B11-B8-B4<\/td><td>Resalta las zonas turbias o arenosas. <\/td><\/tr><tr><td><strong>An\u00e1lisis batim\u00e9trico<\/strong><\/td><td>B2-B3-B4 (ou B2-B3-B8)<\/td><td>Ideal para visualizar la variaci\u00f3n de profundidades sobre fondos claros.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Consejo: ajuste la transparencia del agua con la curva de contraste para distinguir mejor los corales.<\/p>\n<\/blockquote>\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=\"3_Bandas_utiles_para_los_corales\"><\/span>3. Bandas \u00fatiles para los corales<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Banda<\/th><th>Nombre<\/th><th>Resoluci\u00f3n nativa<\/th><th>Sensibilidad principal<\/th><\/tr><\/thead><tbody><tr><td>B1<\/td><td>Coastal aerosol<\/td><td>60 m \u2192 1 m S2DR3<\/td><td>Colonias de coral poco profundas, turbidez.<\/td><\/tr><tr><td>B2<\/td><td>Blue<\/td><td>10 m \u2192 1 m<\/td><td>Aguas claras, profundidad, sustrato.<\/td><\/tr><tr><td>B3<\/td><td>Green<\/td><td>10 m \u2192 1 m<\/td><td>Reflectancia de corales y praderas marinas.<\/td><\/tr><tr><td>B4<\/td><td>Red<\/td><td>10 m \u2192 1 m<\/td><td>Contraste con las zonas terrestres. <\/td><\/tr><tr><td>B8<\/td><td>NIR<\/td><td>10 m \u2192 1 m<\/td><td>Salud de la vegetaci\u00f3n litoral, turbidez.<\/td><\/tr><tr><td>B11<\/td><td>SWIR1<\/td><td>20 m \u2192 1 m<\/td><td>Humedad, sedimentos, profundidad.<\/td><\/tr><tr><td>B12<\/td><td>SWIR2<\/td><td>20 m \u2192 1 m<\/td><td>Detecci\u00f3n de zonas h\u00famedas y minerales.<\/td><\/tr><\/tbody><\/table><\/figure>\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=\"4_Indices_espectrales_recomendados\"><\/span>4. \u00cdndices espectrales recomendados<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u00cdndice<\/th><th>F\u00f3rmula(SCP \u2192 Band calc)<\/th><th>Interpretaci\u00f3n<\/th><\/tr><\/thead><tbody><tr><td><strong>NDWI<\/strong> (\u00cdndice de agua normalizado)<\/td><td><code>(B3 - B8) \/ (B3 + B8)<\/code><\/td><td>Delimita las zonas de agua \/ tierra emergida.<\/td><\/tr><tr><td><strong>BSI<\/strong> (Bare Soil Index)<\/td><td><code>((B11 + B4) - (B8 + B2)) \/ ((B11 + B4) + (B8 + B2))<\/code><\/td><td>Identifica arena \/ sustratos descubiertos.<\/td><\/tr><tr><td><strong>NDTI<\/strong> (Turbidity Index)<\/td><td><code>(B11 - B8) \/ (B11 + B8)<\/code><\/td><td>Detecta agua turbia o cargada de sedimentos.<\/td><\/tr><tr><td><strong>Coral Index (exp\u00e9rimental)<\/strong><\/td><td><code>(B3 - B2) \/ (B3 + B2)<\/code><\/td><td>Resalta las zonas coralinas poco profundas (cuanto mayor es el valor, m\u00e1s predomina la reflectancia verde).<\/td><\/tr><tr><td><strong>Depth Ratio<\/strong> (profundidad relativa)<\/td><td><code>B2 \/ B3<\/code><\/td><td>Estima las variaciones batim\u00e9tricas en fondos claros.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Para todos estos \u00edndices:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aplique un filtro 3\u00d73 para reducir el ruido.<\/li>\n\n\n\n<li>Utilice la paleta \u00abSpectral\u00bb para visualizar mejor los gradientes.<\/li>\n<\/ul>\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=\"Ejemplo_de_profundidad_relativa\"><\/span>Ejemplo de profundidad relativa<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La relaci\u00f3n entre las bandas B2 y B3 permite visualizar las variaciones batim\u00e9tricas. Veamos en detalle c\u00f3mo hacerlo.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>En SCP, vaya a la pesta\u00f1a \u00abC\u00e1lculo de banda\u00bb,<\/li>\n\n\n\n<li>introduzca la f\u00f3rmula \u00abbandset1b2\u00bb\/ \u00abbandset1b3\u00bb<\/li>\n\n\n\n<li>Haga clic en Iniciar<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"302\" data-attachment-id=\"15859\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/scp_calcband\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?fit=2560%2C1207&amp;ssl=1\" data-orig-size=\"2560,1207\" 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=\"scp_calcband\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?fit=640%2C302&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband.jpg?resize=640%2C302&#038;ssl=1\" alt=\"\" class=\"wp-image-15859\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?resize=1024%2C483&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?resize=300%2C141&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?resize=768%2C362&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?resize=1536%2C724&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?resize=2048%2C965&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_calcband-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">De este modo se obtiene la trama del \u00edndice.<\/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\/10\/scp_b2B3.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"409\" data-attachment-id=\"15860\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/scp_b2b3\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?fit=2423%2C1548&amp;ssl=1\" data-orig-size=\"2423,1548\" 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=\"scp_b2B3\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?fit=640%2C409&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?resize=640%2C409&#038;ssl=1\" alt=\"\" class=\"wp-image-15860\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?resize=1024%2C654&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?resize=300%2C192&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?resize=768%2C491&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?resize=1536%2C981&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?resize=2048%2C1308&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/scp_b2B3.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Podemos comparar nuestro resultado con el obtenido con el ICESat_2 Space_Based Laser Bathymetry disponible en Arcgis Online.<\/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\/10\/arconline-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"314\" data-attachment-id=\"15861\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/arconline\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?fit=2560%2C1254&amp;ssl=1\" data-orig-size=\"2560,1254\" 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=\"arconline\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?fit=640%2C314&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline.jpg?resize=640%2C314&#038;ssl=1\" alt=\"\" class=\"wp-image-15861\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?resize=1024%2C502&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?resize=300%2C147&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?resize=768%2C376&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?resize=1536%2C753&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?resize=2048%2C1003&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/arconline-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\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=\"Ejemplo_Deteccion_de_corales_vivos_B2_B3_B4_%E2%80%93_Sentinel-2\"><\/span>Ejemplo: Detecci\u00f3n de corales vivos (B2, B3, B4 \u2013 Sentinel-2)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Objetivo\"><\/span>Objetivo<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Identificar las zonas en las que los corales vivos se distinguen de la arena y las praderas marinas, aprovechando su mayor reflectancia en el verde y su menor reflectancia en el rojo.<\/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=\"Bandas_necesarias\"><\/span>Bandas necesarias<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Banda<\/th><th>Nombre<\/th><th>Longitud de onda (nm)<\/th><th>Utilidad<\/th><\/tr><\/thead><tbody><tr><td>B2<\/td><td>Azul<\/td><td>490<\/td><td>Sensible al agua clara y a las zonas de poca profundidad<\/td><\/tr><tr><td>B3<\/td><td>Verde<\/td><td>560<\/td><td>Reflectancia m\u00e1xima de los corales vivos<\/td><\/tr><tr><td>B4<\/td><td>Rojo<\/td><td>665<\/td><td>Absorbido por los pigmentos zooxantelas (corales vivos)<\/td><\/tr><\/tbody><\/table><\/figure>\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=\"2Indice_espectral_%C2%ABCoral_Index%C2%BB_CI\"><\/span>2.\u00cdndice espectral \u00abCoral Index\u00bb (CI)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00f3rmula simple inspirada en el principio NDVI, adaptada a los corales:<\/p>\n\n\n\\(<br \/>\n\\text{Coral Index} = \\frac{B3 &#8211; B4}{B3 + B4}<br \/>\n\\)\n\n\n\n<p class=\"wp-block-paragraph\">Este \u00edndice es positivo para los corales vivos (mayor reflectancia en el verde que en el rojo) y tiende a 0 o es negativo para la arena o las zonas de aguas profundas.<\/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=\"Calculo_del_indice_en_QGIS_SCP\"><\/span>C\u00e1lculo del \u00edndice en QGIS \/ SCP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Abra SCP \u2192 pesta\u00f1a \u00abConjuntos de bandas\u00bb\n<ul class=\"wp-block-list\">\n<li>A\u00f1ada las bandas B2, B3, B4 (pretratadas o procedentes de S2DR3).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Haga clic en \u00abC\u00e1lculo de banda\u00bb (calculadora).<\/li>\n\n\n\n<li>En el \u00e1rea de f\u00f3rmula, escriba: (\u00abbandset1b3\u00bb &#8211; \u00abbandset1b4\u00bb)\/ (\u00abbandset1b3\u00bb + \u00abbandset1b4\u00bb), que corresponde a (B3 &#8211; B4)\/(B3 + B4).<\/li>\n\n\n\n<li>Elija un nombre de salida: Coral_Index.tif.<\/li>\n\n\n\n<li>Haga clic en Iniciar.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"302\" data-attachment-id=\"15876\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/corralindex\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?fit=2560%2C1207&amp;ssl=1\" data-orig-size=\"2560,1207\" 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=\"corralindex\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?fit=640%2C302&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex.jpg?resize=640%2C302&#038;ssl=1\" alt=\"\" class=\"wp-image-15876\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?resize=1024%2C483&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?resize=300%2C141&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?resize=768%2C362&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?resize=1536%2C724&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?resize=2048%2C965&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindex-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">En nuestro caso, obtenemos:<\/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\/10\/corralindexbrut-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"411\" data-attachment-id=\"15877\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/corralindexbrut\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?fit=2560%2C1643&amp;ssl=1\" data-orig-size=\"2560,1643\" 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=\"corralindexbrut\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?fit=640%2C411&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut.jpg?resize=640%2C411&#038;ssl=1\" alt=\"\" class=\"wp-image-15877\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?resize=1024%2C657&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?resize=300%2C193&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?resize=768%2C493&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?resize=1536%2C986&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?resize=2048%2C1314&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexbrut-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">La presencia de tierra firme da valores negativos. Podemos aplicar una m\u00e1scara para ocultar las zonas que no nos interesan o, simplemente, forzar la simbolog\u00eda conservando solo los valores positivos.<\/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\/10\/corralindexpos-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"308\" data-attachment-id=\"15878\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/corralindexpos\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?fit=2560%2C1234&amp;ssl=1\" data-orig-size=\"2560,1234\" 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=\"corralindexpos\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?fit=640%2C308&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos.jpg?resize=640%2C308&#038;ssl=1\" alt=\"\" class=\"wp-image-15878\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?resize=1024%2C493&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?resize=300%2C145&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?resize=768%2C370&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?resize=1536%2C740&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?resize=2048%2C987&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpos-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Lo que da como resultado:<\/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\/10\/corralindexpross-scaled.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"409\" data-attachment-id=\"15879\" data-permalink=\"https:\/\/www.sigterritoires.fr\/index.php\/etude-des-coraux-avec-sentinel-2-deep-resolution-3-s2dr3-avec-qgis-et-scp\/corralindexpross\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?fit=2560%2C1636&amp;ssl=1\" data-orig-size=\"2560,1636\" 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=\"corralindexpross\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?fit=640%2C409&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross.jpg?resize=640%2C409&#038;ssl=1\" alt=\"\" class=\"wp-image-15879\" srcset=\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?resize=1024%2C654&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?resize=300%2C192&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?resize=768%2C491&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?resize=1536%2C982&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?resize=2048%2C1309&amp;ssl=1 2048w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?w=1280&amp;ssl=1 1280w, https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2025\/10\/corralindexpross-scaled.jpg?w=1920&amp;ssl=1 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\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=\"Filtrado_3%C3%973_reduccion_del_ruido\"><\/span>Filtrado 3\u00d73 (reducci\u00f3n del ruido)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En QGIS:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Abre la caja de herramientas de procesamiento.<\/li>\n\n\n\n<li>Busca Grass-&gt;Raster-&gt;r.neighbors<br>\u2192 Entrada: CoralIndex.tif<br>\u2192 Tama\u00f1o del n\u00facleo: 3<br>\u2192 Salida: CoralIndex_filtered.tif<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">La diferencia entre el \u00edndice bruto y el \u00edndice filtrado se aprecia claramente al ampliar una zona de corales:<\/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=\"Visualizacion\"><\/span>Visualizaci\u00f3n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Estilo \u2192 Paleta de pseudocolores (viridis o RdYlGn)<\/li>\n\n\n\n<li>Regla:\n<ul class=\"wp-block-list\">\n<li>Valores altos (verdes) \u2192 probablemente corales vivos<\/li>\n\n\n\n<li>Valores bajos (azules\/rojos) \u2192 arena, praderas marinas o aguas profundas<\/li>\n<\/ul>\n<\/li>\n<\/ul>\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=\"Interpretacion_sobre_el_terreno_Blue_Bay_%E2%80%93_Ile_aux_Aigrettes\"><\/span>Interpretaci\u00f3n sobre el terreno (Blue Bay \u2013 \u00cele aux Aigrettes)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zonas verde-amarillo claro: arrecifes sanos, corales vivos.<\/li>\n\n\n\n<li>Zonas verde oscuro-azul: sustrato desnudo o corales muertos.<\/li>\n\n\n\n<li>Zonas azules: praderas marinas o aguas profundas.<\/li>\n\n\n\n<li>Zonas muy oscuras: turbidez o sombras del agua.<\/li>\n<\/ul>\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=\"Comparacion_entre_Sentinel-2_original_y_S2DR3\"><\/span>Comparaci\u00f3n entre Sentinel-2 original y S2DR3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Descargue la escena Sentinel-2 original (L2A, 10 m) para la misma fecha a trav\u00e9s de Copernicus Hub o SCP \u2192 Descargar productos.<\/li>\n\n\n\n<li>En QGIS:\n<ul class=\"wp-block-list\">\n<li>Cree una composici\u00f3n RGB de 10 m y otra con las bandas de 1 m S2DR3.<\/li>\n\n\n\n<li>Utilice \u00abSwipe map view\u00bb o \u00abTransparency slider\u00bb para compararlas visualmente.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Opci\u00f3n cuantitativa:\n<ul class=\"wp-block-list\">\n<li>Calcule NDWI, NDVI o Coral Index para ambas im\u00e1genes.<\/li>\n\n\n\n<li>Utilice Raster \u2192 Raster calculator para generar una diferencia (\u0394): NDWI_S2DR3 &#8211; NDWI_Sentinel2.<\/li>\n\n\n\n<li>Las zonas con grandes diferencias indican los detalles a\u00f1adidos o las variaciones detectadas.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\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=\"Consejos_para_un_analisis_fiable\"><\/span>Consejos para un an\u00e1lisis fiable<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compruebe los metadatos: fecha, cobertura nubosa, \u00e1ngulo solar.<\/li>\n\n\n\n<li>Evite los d\u00edas con fuerte oleaje o turbidez (los reflejos alteran las proporciones).<\/li>\n\n\n\n<li>Los detalles S2DR3 se deducen mediante IA: util\u00edcelos para la localizaci\u00f3n, no para mediciones m\u00e9tricas precisas.<\/li>\n\n\n\n<li>Para las zonas de inter\u00e9s cient\u00edfico, combine S2DR3 con observaciones con drones o fotograf\u00edas a\u00e9reas para su validaci\u00f3n.<\/li>\n<\/ul>\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=\"Ejemplo_de_flujo_de_trabajo_SCP_resumen\"><\/span>Ejemplo de flujo de trabajo SCP (resumen)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Cargar las bandas S2DR3 (1 m) \u2192 crear Band Set.<\/li>\n\n\n\n<li>Calcular NDWI, NDTI, Coral Index.<\/li>\n\n\n\n<li>Clasificar con \u00abUnsupervised \u2192 K-means\u00bb o \u00abSupervised \u2192 ROI + Classification\u00bb.<\/li>\n\n\n\n<li>Exportar las clases (corales, praderas marinas, arena, aguas profundas).<\/li>\n\n\n\n<li>Comparar con Sentinel-2 10 m para validaci\u00f3n.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tras el art\u00edculo \u00abC\u00f3mo aumentar la resoluci\u00f3n de las im\u00e1genes Sentinel 2 de 10 a 1 m\u00bb y \u00abUtilizar S2DR3 en Google Colab para el estudio de los corales en Mauricio\u00bb, veamos aqu\u00ed c\u00f3mo explotar las&hellip;<\/p>\n","protected":false},"author":1,"featured_media":15860,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[3821,3442,1357],"tags":[3825,3827,2703,3829],"class_list":["post-15937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-images-es","category-pluigin-es","category-qgis-es","tag-google-colab-es","tag-s2dr3-es","tag-scp-es","tag-sentinel-2-es"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Tras el art\u00edculo \u00abC\u00f3mo aumentar la resoluci\u00f3n de las im\u00e1genes Sentinel 2 de 10 a 1 m\u00bb y \u00abUtilizar S2DR3 en Google Colab para el estudio de los corales en Mauricio\u00bb, veamos aqu\u00ed c\u00f3mo explotar las capas de superresoluci\u00f3n en QGis con el complemento SCP. 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