{"id":14009,"date":"2021-04-27T19:04:19","date_gmt":"2021-04-27T17:04:19","guid":{"rendered":"http:\/\/cienciagandia.webs.upv.es\/?p=14009"},"modified":"2021-04-27T19:02:19","modified_gmt":"2021-04-27T17:02:19","slug":"teledeteccio-de-parcelles-de-citrics-abandonades","status":"publish","type":"post","link":"https:\/\/cienciagandia.webs.upv.es\/ca\/2021\/04\/teledeteccio-de-parcelles-de-citrics-abandonades\/","title":{"rendered":"Teledetecci\u00f3 de parcel\u00b7les de c\u00edtrics abandonades"},"content":{"rendered":"<p>L&#8217;aband\u00f3 de les terres agr\u00edcoles \u00e9s un problema cada vegada major i la Comunitat Valenciana, una de les regions productores de c\u00edtrics m\u00e9s importants, \u00e9s una de les que m\u00e9s pateix aquesta situaci\u00f3. Per aix\u00f2, personal investigador del <a href=\"http:\/\/www.upv.es\/contenidos\/CGANDIA\/index-va.html\">Campus de Gandia<\/a> de la <a href=\"http:\/\/www.upv.es\/index-va.html\">Universitat Polit\u00e8cnica de Val\u00e8ncia (UPV)<\/a> ha realitzat un estudi en el qual es proposa l&#8217;\u00fas<strong> d&#8217;imatges d&#8217;alta resoluci\u00f3 i t\u00e8cniques d&#8217;aprenentatge autom\u00e0tic per a la teledetecci\u00f3 de parcel\u00b7les de c\u00edtrics abandonades.<\/strong><\/p>\n<p><strong>\u201cLa teledetecci\u00f3 pot aportar una informaci\u00f3 molt valuosa per al control, el seguiment i la gesti\u00f3 de les parcel\u00b7les agr\u00edcoles\u201d,<\/strong> ha indicat <strong><a href=\"http:\/\/www.upv.es\/pls\/oalu\/sic_person.info?PE=K5MRNhA8C7iTib%2FgTfPnDH9jEHmW6bB9FPK58HEwfG70i7lVQyCjFXaFOtRc0p0z8HfoIu2wU%2FJW%2FP0lsgPW4ffbJBlxYkXaaZ%2BUtOuOECni46ey%2FlZXzA%3D%3D&amp;P_IDIOMA=v&amp;P_VISTA=\">Sergio Morell<\/a><\/strong>, investigador del Campus. \u201cTradicionalment, els mapes agr\u00edcoles s&#8217;han generat mitjan\u00e7ant fotointerpretaci\u00f3 d&#8217;ortofotografies o a trav\u00e9s de campanyes de camp. Per\u00f2, en l&#8217;actualitat, la teledetecci\u00f3 s&#8217;ha convertit en una eina poderosa per a obtenir mapes d&#8217;usos del s\u00f2l que pot reempla\u00e7ar la creaci\u00f3 de mapes manuals amb un \u00fas m\u00e9s eficient dels recursos personals i una major immediatesa\u201d.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13992\" src=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-imagen_parcelas-abandonadas.jpg\" alt=\"\" width=\"640\" height=\"370\" srcset=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-imagen_parcelas-abandonadas.jpg 640w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-imagen_parcelas-abandonadas-432x250.jpg 432w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-imagen_parcelas-abandonadas-150x87.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>L&#8217;estudi, dut a terme per Morell juntament amb personal expert en teledetecci\u00f3,<strong> <a href=\"http:\/\/www.upv.es\/pls\/oalu\/sic_person.info?PE=K5MRNhA8C7iTib%2FgTfPnDGNJh%2FCt%2BmPRpCLH13n99r70i7lVQyCjFXaFOtRc0p0zq8JqPuXsfIFW%2FP0lsgPW4ffbJBlxYkXa0OOgpU%2BpdEZKSj4YWEA1%2BQ%3D%3D&amp;P_IDIOMA=v&amp;P_VISTA=normal\">Mar\u00eda Teresa Sebasti\u00e1<\/a><\/strong>, i <a href=\"http:\/\/www.upv.es\/pls\/oalu\/sic_person.info?PE=K5MRNhA8C7iTib%2FgTfPnDMBhyMtxWZ2PowD73IGDVoD0i7lVQyCjFXaFOtRc0p0zNXHf%2F0IvKfcNw2s9GHQjy84bM%2FW%2F4HfcRzmKYuR2TWeCzOLecQHkbg%3D%3D&amp;P_IDIOMA=v&amp;P_VISTA=normal\"><strong>Javier Estornell<\/strong><\/a>, del Campus de Gandia, mostra la dificultat per a detectar parcel\u00b7les abandonades de c\u00edtrics a trav\u00e9s de les imatges del sat\u00e8l\u00b7lit Sentinel-2 del programa Copernicus de la Comissi\u00f3 Europea i proposa l&#8217;\u00fas d&#8217;imatges d&#8217;alta resoluci\u00f3. En el nostre territori, aquesta dificultat \u201c\u00e9s deguda a la xicoteta grand\u00e0ria de les explotacions agr\u00edcoles, a l&#8217;alta fragmentaci\u00f3 espacial i a les m\u00ednimes difer\u00e8ncies espectrals entre parcel\u00b7les abandonades i en producci\u00f3\u201d.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13998\" src=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/2-foto_investigadores1-759x500.jpg\" alt=\"\" width=\"669\" height=\"441\" srcset=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/2-foto_investigadores1-759x500.jpg 759w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/2-foto_investigadores1-380x250.jpg 380w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/2-foto_investigadores1-150x99.jpg 150w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/2-foto_investigadores1.jpg 764w\" sizes=\"auto, (max-width: 669px) 100vw, 669px\" \/><\/p>\n<p>En el treball, publicat en la revista <em>Remote Sensing <\/em>i que \u00e9s fruit de la <strong>tesi doctoral<\/strong> de <strong>Sergio Morell<\/strong>, s&#8217;ha desenvolupat una <strong>metodologia per a la detecci\u00f3 de parcel\u00b7les abandonades<\/strong> i s&#8217;ha demostrat que les imatges a\u00e8ries d&#8217;alta resoluci\u00f3 amb quatre bandes espectrals generen resultats m\u00e9s precisos que les imatges Sentinel-2 per a identificar xicotetes parcel\u00b7les de c\u00edtrics abandonades.<\/p>\n<p><strong>NOU ENFOCAMENT <\/strong><\/p>\n<p>L&#8217;aband\u00f3 de terres ha sigut estudiat en el camp de la teledetecci\u00f3. No obstant aix\u00f2, fins ara, ha sigut poc estudiat i <strong>no s&#8217;hi havia<\/strong> <strong>geolocalitzat l&#8217;aband\u00f3 de terres de c\u00edtrics amb aquest nivell de detall<\/strong>. Com ha explicat Morell, \u201cla metodologia proposada <strong>combina t\u00e8cniques de teledetecci\u00f3 i aprenentatge autom\u00e0tic que permeten classificar una parcel\u00b7la agr\u00edcola en tres categories<\/strong> (abandonada, productiva i no productiva) a partir de caracter\u00edstiques espectrals i de textura extretes d&#8217;una imatge d&#8217;alta resoluci\u00f3. La metodologia va obtenir una <strong>precisi\u00f3 de classificaci\u00f3 del 95% <\/strong>en l&#8217;\u00e0rea d&#8217;entrenament i d&#8217;un 93% fora d&#8217;aquesta \u00e0rea\u201d. Per a Morell, \u201cel treball <strong>proporciona un nou enfocament per a detectar parcel\u00b7les agr\u00edcoles abandonades de grand\u00e0ria redu\u00efda en cultius llenyosos de fulla perenne\u201d. <\/strong><\/p>\n<audio class=\"wp-audio-shortcode\" id=\"audio-14009-1\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/entrevista.mp3?_=1\" \/><a href=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/entrevista.mp3\">https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/entrevista.mp3<\/a><\/audio>\n<p>&nbsp;<\/p>\n<p>A m\u00e9s, la identificaci\u00f3 precisa de l&#8217;aband\u00f3 de terres ofereix informaci\u00f3 \u00fatil \u201cper a avaluar <strong>l&#8217;efectivitat de les pol\u00edtiques agr\u00edcoles, realitzar inventaris de c\u00edtrics i estimacions de rendiment anual, per a la gesti\u00f3 del paisatge i dels recursos h\u00eddrics<\/strong>, entre altres\u201d.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13986\" src=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-7-estudio.png\" alt=\"\" width=\"640\" height=\"349\" srcset=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-7-estudio.png 640w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-7-estudio-458x250.png 458w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-7-estudio-150x82.png 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<p><strong>APLICACI\u00d3 A OLIVA<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-13989 alignleft\" src=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-6-estudio-oliva-547x500.png\" alt=\"\" width=\"411\" height=\"376\" srcset=\"https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-6-estudio-oliva-547x500.png 547w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-6-estudio-oliva-274x250.png 274w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-6-estudio-oliva-150x137.png 150w, https:\/\/cienciagandia.webs.upv.es\/wp-content\/uploads\/2021\/04\/1-figura-6-estudio-oliva.png 640w\" sizes=\"auto, (max-width: 411px) 100vw, 411px\" \/><\/p>\n<p>Per a l&#8217;estudi, el personal investigador s&#8217;ha centrat en el municipi d&#8217;Oliva. La localitat abasta una superf\u00edcie de 59.600 hect\u00e0rees, de les quals el 50% est\u00e0 disponible per a l&#8217;agricultura (95% c\u00edtrics). No obstant aix\u00f2, la situaci\u00f3 desfavorable de les campanyes de c\u00edtrics valencians en el mercat europeu, les febleses del mateix sector juntament amb l&#8217;expansi\u00f3 urbana i el turisme competeixen amb els usos agr\u00edcoles i estan promovent l&#8217;aband\u00f3 de terres en aquest municipi. Les primeres dades derivades d&#8217;aquesta metodologia suggereixen que, \u201ca Oliva, aproximadament <strong>el 30% de les parcel\u00b7les agr\u00edcoles estan abandonades<\/strong>. Aquests resultats posen de manifest la necessitat de la metodologia per a evitar subestimar la superf\u00edcie abandonada\u201d. Addicionalment, la metodologia va ser provada en altres municipis de la Comunitat Valenciana amb cultius de c\u00edtrics <strong>com Bellreguard-Almoines<\/strong> <strong>Benicull-Poliny\u00e0 del X\u00faquer i Nules.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>M\u00e9s informaci\u00f3:<\/p>\n<p><a href=\"https:\/\/www.mdpi.com\/2072-4292\/13\/4\/681\">Morell-Monz\u00f3, S.; Sebasti\u00e1-Frasquet, M.-T.; Estornell, J. Land Use Classification of VHR Images for Mapping Small-Sized Abandoned Citrus Plots by Using Spectral and Textural Information.\u00a0Remote Sens.\u00a0<strong>2021<\/strong>,\u00a013, 681.<\/a><\/p>\n<p><a href=\"https:\/\/www.mdpi.com\/2072-4292\/12\/12\/2062\">Morell-Monz\u00f3, S.; Estornell, J.; Sebasti\u00e1-Frasquet, M.-T. Comparison of Sentinel-2 and High-Resolution Imagery for Mapping Land Abandonment in Fragmented Areas.\u00a0Remote Sens.\u00a0<strong>2020<\/strong>,\u00a012, 2062<\/a>.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">Font: <strong>Laida Frasquet Pascual<\/strong><\/p>\n<p style=\"text-align: center;\">\u00c0rea de Comunicaci\u00f3 del Campus de Gandia<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&#8217;aband\u00f3 de les terres agr\u00edcoles \u00e9s un problema cada vegada major i la Comunitat Valenciana, una de les regions productores de c\u00edtrics m\u00e9s importants, \u00e9s &#8230; <a title=\"Teledetecci\u00f3 de parcel\u00b7les de c\u00edtrics abandonades\" class=\"read-more\" href=\"https:\/\/cienciagandia.webs.upv.es\/ca\/2021\/04\/teledeteccio-de-parcelles-de-citrics-abandonades\/\" aria-label=\"Read more about Teledetecci\u00f3 de parcel\u00b7les de c\u00edtrics abandonades\">Llegir m\u00e9s<\/a><\/p>\n","protected":false},"author":15,"featured_media":13996,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[246],"tags":[],"class_list":["post-14009","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ambientals","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Teledetecci\u00f3 de parcel\u00b7les de c\u00edtrics abandonades - Campus de Gandia Ciencia - UPV Universitat Polit\u00e8cnica de Val\u00e8ncia<\/title>\n<meta name=\"description\" content=\"Investigadors de la UPV han realitzat un estudi per a la teledetecci\u00f3 de parcel\u00b7les de c\u00edtrics abandonats.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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