{"id":69341,"date":"2019-02-23T17:27:32","date_gmt":"2019-02-23T17:27:32","guid":{"rendered":"https:\/\/ant.plantae.lavallweb.com\/?p=69341"},"modified":"2025-03-11T20:43:24","modified_gmt":"2025-03-11T18:43:24","slug":"imagenes-satelitales-e-indices-ndvi-y-ndwi","status":"publish","type":"post","link":"https:\/\/ant.plantae.lavallweb.com\/en\/imagenes-satelitales-e-indices-ndvi-y-ndwi\/","title":{"rendered":"Satellite images and indexes NDVI and NDWI-Precision Agriculture"},"content":{"rendered":"\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Con el aumento de la poblaci\u00f3n y la cada vez m\u00e1s creciente demanda de alimentos por parte de la misma, la agricultura se ha visto obligada a evolucionar y a usar tecnolog\u00eda relacionada con las <strong>im\u00e1genes satelitales<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hay que satisfacer las necesidades de una comunidad \u00e1vida de nutrientes, asegurar la buena administraci\u00f3n de los recursos agr\u00edcolas y por tanto el uso de las nuevas tecnolog\u00edas juega un papel fundamental.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pues bien, la agricultura se ha servido de la<em> tecnolog\u00eda satelital o a\u00e9rea de Detecci\u00f3n Remota (RS por sus siglas en ingl\u00e9s)<\/em> para dicho prop\u00f3sito, poniendo la ingenier\u00eda espacial a su servicio.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"412\" data-id=\"76038\" src=\"https:\/\/ant.plantae.lavallweb.com\/wp-content\/uploads\/2020\/12\/campazas-leon-2.jpg\" alt=\"Im\u00e1genes satelitales y drones en el \u00e1mbito agroforestal\" class=\"wp-image-76038\"\/><figcaption class=\"wp-element-caption\">Im\u00e1genes satelitales y drones en el \u00e1mbito agroforestal<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"300\" height=\"414\" data-id=\"76037\" src=\"https:\/\/ant.plantae.lavallweb.com\/wp-content\/uploads\/2020\/12\/campazas-leon.jpg\" alt=\"Im\u00e1genes satelitales y drones en el \u00e1mbito agroforestal\" class=\"wp-image-76037\"\/><figcaption class=\"wp-element-caption\">Comparaci\u00f3n de im\u00e1genes satelitales y drones en el \u00e1mbito agroforestal<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfQu\u00e9 im\u00e1genes satelitales se toman?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La combinaci\u00f3n de im\u00e1genes satelitales nos permite analizar elementos espec\u00edficos de la superficie terrestre en funci\u00f3n de su espectro de emisi\u00f3n. Gracias a las&nbsp;<a href=\"http:\/\/www.gisandbeers.com\/equivalencia-bandas-multiespectrales-satelites\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>distintas bandas multiespectrales<\/strong>&nbsp;<\/a>de operaci\u00f3n de los sat\u00e9lites podemos interpretar aspectos como la vegetaci\u00f3n, los usos del suelo o las masas de agua.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La misi\u00f3n Sentinel-2 dispone del instrumento <strong>MSI<\/strong> (MultiSpectral Instrument) que toma datos de alta resoluci\u00f3n espacial con el fin de monitorizar la superficie terrestre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>En las siguientes im\u00e1genes satelitales se aprecia la diferencia de humedad en las diferentes parcelas de la provincia de Le\u00f3n.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-gallery aligncenter has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"300\" height=\"368\" data-id=\"76040\" src=\"https:\/\/ant.plantae.lavallweb.com\/wp-content\/uploads\/2020\/02\/Los-Almagros-Murcia.jpg\" alt=\"Imagen satelital en Los-Almagros-Murcia\" class=\"wp-image-76040\"\/><figcaption class=\"wp-element-caption\">Imagen satelital<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"391\" data-id=\"76039\" src=\"https:\/\/ant.plantae.lavallweb.com\/wp-content\/uploads\/2020\/02\/Los-Almagros-Murcia-.jpg\" alt=\"Im\u00e1genes satelitales y drones en el \u00e1mbito agroforestal en los Almagros\" class=\"wp-image-76039\"\/><figcaption class=\"wp-element-caption\">Los Almagros-Murcia<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Podemos comparar con las siguientes de la regi\u00f3n de Murcia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tipos de bandas<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Las bandas obtenidas a partir del&nbsp;sat\u00e9lite Sentinel-2&nbsp;del programa Copernicus de ESA son:<\/strong>\n<ul class=\"wp-block-list\">\n<li>1: 443 nm (azul), resoluci\u00f3n 60 m\/px<\/li>\n\n\n\n<li>2: 490 nm (azul), resoluci\u00f3n 10 m\/px<\/li>\n\n\n\n<li>3: 560 nm (verde), resoluci\u00f3n 10 m\/px<\/li>\n\n\n\n<li>4: 665 nm (rojo), resoluci\u00f3n 10 m\/px<\/li>\n\n\n\n<li>5: 705 nm (rojo), resoluci\u00f3n 20 m\/px<\/li>\n\n\n\n<li>6: 740 nm (ultrarojo), resoluci\u00f3n 20 m\/<\/li>\n\n\n\n<li>7: 783 nm (rojo lejano), resoluci\u00f3n 20 m\/px<\/li>\n\n\n\n<li>8: 842 nm (infrarrojo cercano), resoluci\u00f3n 10 m\/px<\/li>\n\n\n\n<li>9: 940 nm (vapor de agua), resoluci\u00f3n 60 m\/px<\/li>\n\n\n\n<li>10: 1375 nm (onda corta infarroja &#8211; Cirrus) , resoluci\u00f3n 60 m\/px<\/li>\n\n\n\n<li>11: 1610 nm (onda corta infrarrojo), resoluci\u00f3n 20 m\/px<\/li>\n\n\n\n<li>12: 2190 nm (onda corta infrarrojo 2), resoluci\u00f3n 20 m\/px<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Combinaciones espec\u00edficas RGB nos mostrar\u00e1n y discriminar\u00e1n los elementos de nuestras im\u00e1genes satelitales de forma r\u00e1pida.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfC\u00f3mo se analizan las im\u00e1genes satelitales?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Con las im\u00e1genes satelitales y mediante programas de procesamiento&nbsp;raster, <strong>podemos calcular distintos \u00edndices como: <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>El NDVI<\/strong> (\u00cdndice diferencial de vegetaci\u00f3n normalizado) <strong>que mide la intensidad de verde de la planta.<\/strong><\/li>\n\n\n\n<li>Y el <strong>NDWI<\/strong>\u00a0(del ingl\u00e9s\u00a0<em>Normalized Difference Water Index<\/em>)\u00a0<strong>\u00edndice diferencial de agua normalizado<\/strong>\u00a0que\u00a0se utiliza como una medida de la cantidad de\u00a0<a href=\"https:\/\/es.wikipedia.org\/wiki\/Agua\" target=\"_blank\" rel=\"noreferrer noopener\">agua<\/a>\u00a0que posee la vegetaci\u00f3n o el nivel de saturaci\u00f3n de\u00a0<a href=\"https:\/\/es.wikipedia.org\/wiki\/Humedad\" target=\"_blank\" rel=\"noreferrer noopener\">humedad<\/a>\u00a0que posee el suelo.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Con el <strong>NDVI<\/strong> se calcula pixel por pixel la imagen a partir de la reflexi\u00f3n de la longitud de onda del infrarrojo cercano y del rojo y permite generar una imagen que muestra la biomasa relativa. La absorci\u00f3n de clorofila en la banda roja y la reflectancia relativamente alta de la vegetaci\u00f3n en la banda infrarroja cercana (NIR) tambi\u00e9n se utilizan para calcular dicho \u00edndice.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para el <strong>NDVI<\/strong> se usan las bandas 8 y 4 con esta relaci\u00f3n&nbsp;<em>[(8-4) \/ (8+4)]<\/em> mientras que para el <strong>NDWI<\/strong> se utilizan las bandas 3 y 8 con la relaci\u00f3n <em>[(3-8) \/ (3+8)].<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfC\u00f3mo usa Plantae esta tecnolog\u00eda?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para definir correctamente la instalaci\u00f3n de los sensores y su ubicaci\u00f3n, en <strong><a href=\"https:\/\/ant.plantae.lavallweb.com\/visualizando-algunos-clientes\/\" target=\"_blank\" rel=\"noreferrer noopener\">Plantae<\/a><\/strong> usamos esta tecnolog\u00eda definiendo a nuestros clientes d\u00f3nde recomendar\u00edamos hacer la implementaci\u00f3n de las sondas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En las im\u00e1genes satelitales inferiores se expresa c\u00f3mo mostramos el comportamiento de una finca con las precipitaciones y riegos, marcando posteriormente la ubicaci\u00f3n.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"514\" height=\"400\" data-id=\"76042\" src=\"https:\/\/ant.plantae.lavallweb.com\/wp-content\/uploads\/2020\/02\/satelite.png\" alt=\"Imagen satelital\" class=\"wp-image-76042\"\/><figcaption class=\"wp-element-caption\">Imagen satelital<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"500\" data-id=\"76041\" src=\"https:\/\/ant.plantae.lavallweb.com\/wp-content\/uploads\/2020\/02\/IMAGEN-SATELITAL.png\" alt=\"Imagen satelital\" class=\"wp-image-76041\"\/><figcaption class=\"wp-element-caption\">Comparativa con la anterior<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Fuentes:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-plantae wp-block-embed-plantae\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"06VyhGvFDG\"><a href=\"https:\/\/ant.plantae.lavallweb.com\/\">Inicio<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u00abInicio\u00bb \u2014 Plantae\u00ae\" src=\"https:\/\/ant.plantae.lavallweb.com\/embed\/#?secret=4JhbJfwJcr#?secret=06VyhGvFDG\" data-secret=\"06VyhGvFDG\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Agriculture uses Remote Sensing satellite or aerial imagery to prosper, putting space engineering at its service.<\/p>","protected":false},"author":5,"featured_media":76042,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[139],"tags":[15,140,146,3,31],"class_list":["post-69341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agricultura-de-precision-sondas-sensores","tag-agricultura-de-precision","tag-agrotecnologia","tag-imagenes-satelitales","tag-plantae","tag-sensores-y-sondas-agricolas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - 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